ACCESS NETWORK DEVICE, USER EQUIPMENT AND RESPECTIVE METHODS FOR CONFIGURING DEMODULATION REFERENCE

专利摘要:
relevant demodulation reference signal resource configuration method and device the embodiments of the present invention disclose relevant demodulation reference signal resource configuration methods and devices, wherein a resource configuration method of a demodulation reference signal demodulation may comprise: determining the number of eu transmission layers to transmit uplink data; select combinable cs and occ sequence configurations needed to generate dmrs sequences from the respective eu transmission layers to transmit uplink data, from a combinable configuration item of multiple combinable cs and occ sequence configuration items that are predefined, targeted for the maximum number of transmission layers supported by the system, and usable to generate demodulation reference signal sequences dmrs of the respective transmission layers, based on the determined number of transmission layers; generate and deliver to the eu a control signal containing configuration indication information. solutions of the modalities of the present invention can simplify the complexity of a protocol by describing the configurations of dmrs resources, and are useful for reducing dmrs interference between code words.
公开号:BR112012033717B1
申请号:R112012033717-3
申请日:2011-01-20
公开日:2021-03-23
发明作者:Yang Li；Mingyu Zhou；Yuan Xia
申请人:Huawei Technologies Co., Ltd.；
IPC主号:

专利说明:

[0001] The present invention relates to the field of telecommunications technology, in particular to a relevant method and device for configuring resources of a demodulation reference signal. BACKGROUND OF THE INVENTION
[0002] In a Long-Term Evolution (LTE) system of a Third Generation Partnership Project (3GPP), a data link upstream transmission usually uses a Demodulation Reference Signal (DMRS) for channel estimation.
[0003] A base station allocates a Block of Physical Resources (PRB) or PRBs to transmit uphill link data for each User Equipment (UE) needing to transmit uphill link data, considering that the minimum granularity of the resource mapping is referred to as Element Resource (RE), and the resources for loading DMRS are located within the PRBs for transmitting uphill link data allocated by the base station to the UE. For example, the pilot frequency structure of a Relte-8 LTE uplink DMRS is shown in figure 1. A subframe consists of 14 symbols, which are divided into two intervals, each interval containing 7 symbols. Within each allocated PRB, the resource element carrying DMRS occupies the fourth and eleventh symbol, that is, the symbols in the middle of each interval. A DMRS sequence can be generated by cyclically shifting a Sequence of Constant Amplitude With Zero Correlation (CAZAC). Different CAZAC sequences generate different DMRS sequences. The base station informs through a control signaling a UE about the Cyclic Displacement (CS) used to generate the DMRS sequence, and the UE generates the DMRS sequence according to the control signaling.
[0004] In an LTE-Advanced (LTE-A) system, to further increase the rate of upstream link transmission of a UE, transmission of Multiple Inputs, Multiple Outputs (MIMO) of uplink link is introduced. The UE can perform a multi-layer spatial multiplexing transmission. To support multi-layer transmission, the base station needs to allocate respective DMRS strings to UE transmission layers, which are orthogonal to each other. In order not to increase the complexity of the system design, the respective DMRS sequences of transmission layers can occupy the same time-frequency resources. That is, the LTE Rel-8 DMRS time-frequency standard is still used, and code division orthogonality is achieved by configuring different CSs to generate the DMRS strings.
[0005] For multiple user MIMO scheduling (MU-MIMO), that is, at least two UEs are matched for transmission, if the PRB resources allocated by the base station to the matched UEs are not aligned, then the lengths of the DMRS strings used by the matched UEs are different. DMRS strings of different lengths cannot be orthogonalized with code splitting only through CSs. To ensure the orthogonality between the DMRS strings of MU-MIMO UEs with allocated non-aligned PRB resources, the LTE-A system introduces a code division mode based on the sequence of Orthogonal Cover Codes (OCC), that is, in addition to allocate for each UE a CS to generate DMRS sequence, different OCC sequences will also be allocated to act on the DMRS sequence of two intervals of a PRB.
[0006] The OCC strings can be {1, 1} and {1, -1}. It can be assumed that UE1 and UE2 are married UEs staggered for MU-MIMO, and the sequence {1, 1} is allocated to UE1, the sequence {1, -1} is allocated to UE2. Within the first interval of a certain PRB, UE1 and UE2 multiply the DMRS sequence generated after cyclic displacement by the first bit of the OCC sequence, and within the second interval they multiply the DMRS sequence generated after cyclic displacement by the second bit of the OCC sequence. In such a case, to achieve orthogonality, the CSs used by each UE within the two intervals of a PRB are the same, and the UEs do not perform a sequence group jump between intervals. As an OCC sequence can also further strengthen the orthogonality between DMRSs for multiple layers, in an LTE-A system, an OCC sequence can also be applied for DMRS orthogonality for a single UE MIMO. That is, different OCC sequences can be allocated to different transmission layers from a single UE. In such a case, a control signal delivered by the base station needs to inform the UE about the CS and OCC sequence required to generate the respective transmission layer DMRS sequences.
[0007] The current proposal R1-101008 presents multiple combinable configurations of CS and OCC sequence that can be applied in the generation of DMRS sequences, in which different combinable configurations of CS and OCC sequence can be established corresponding to a different transmission layer number than a UE. The multiple combinable configurations based on different classification values, which are presented by proposal R1-101008, are shown specifically in Table 1 (it can be called the DMRS resource configuration table).
[0008] In Table 1, classification denotes the number of transmission layers of a UE to transmit data on uphill link. In Table 1, for example, assuming that the system can support a maximum of four transmission layers, the base station selects the combinable CS configuration and OCC sequence allocated to the UE in the predefined Table 1, and informs the UE about the values of classification and the DMRS resource configuration number. The UE searches in the predefined Table 1 according to the informed classification value and DMRS resource configuration number, and obtains the combinable configuration item from the CS and OCC sequence resource usable to generate the DMRS sequence and allocated by the base station.
[0009] When studying and practicing the prior art, the inventor found that, in the current DMRS resource configuration mode, the combinable configuration items of the established CS and OCC sequence resources corresponding to different classification values are independent of each other, which by some extension add complexity to the specification definition. SUMMARY OF THE INVENTION
[0010] Modalities of the present invention provide a relevant method and device for configuring resources for a demodulation reference signal, which can simplify the complexity of describing the specification regarding the combinable CS configuration and OCC sequence that are required to generate DMRS, and can reduce interference between code word DMRSs.
[0011] To solve the technical problems indicated above, the modalities of the present invention provide the following technical schemes: A method of configuring resources for a demodulation reference signal, including: determining the number of User Equipment (UE) transmission layers to transmit uphill link data; select, based on the determined number of transmission layers, a combinable CS configuration and OCC sequence that is required to generate respective DMRS streams from the UE transport layer to transmit uplink data from one of multiple items of combinable configurations predefined CS resources and OCC sequence, where combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective transmission layer DMRS strings, and where a first configuration condition is satisfied between the various items of the predefined combinable configuration items, and the first configuration condition includes that different OCC strings are configured among the combinable configuration items that are configured with at least two equal CS features; generate a control signal and deliver the control signal to the UE, where the control signal contains configuration indication information, and the configuration indication information indicates the selected combinable configuration of the CS and OCC sequence that is required to generate respective DMRS sequences of the transmission layers of the UE to transmit uplink data.
[0012] A method of configuring resources for a demodulation reference signal, including: receiving a control signal containing configuration indication information delivered by an access network device, where configuration indication information indicates a combinable configuration of CS resources and OCC sequence that is required to generate respective transmission layer DMRS sequences UE to transmit uphill link data, the configuration combination is selected by the access network device, based on a specified number of transmission layers of the UE to transmit uplink data, from one of multiple items of preset combinable configurations of CS and OCC sequence, and multiple items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system, and are usable to generate DMRS strings from the respective transmission layers; determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information, where the combinable configuration is selected by the access network device and is required to generate respective UE transmission layer DMRS strings for transmitting uphill link data, and the combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective transmission layer DMRS strings; generate the respective DMRS strings of the UE transmission layers to transmit uphill link data using CS and OCC sequence resources corresponding to the determined combinable configuration.
[0013] An access network device, including: a determination module, configured to determine the number of transmission layers of a UE to transmit uphill link data; a configuration selection module, configured to select, based on the number of transmission layers determined by the determination module, a combinable configuration of CS and OCC sequence that is required to generate respective DMRS strings from the UE transmission layers to transmit data uplink link, from one of multiple items of preset combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective DMRS layers transmission, and where a first configuration condition is satisfied among the predefined combinable configuration items, and the first configuration condition includes that different OCC sequences are configured among the combinable configuration items that are configured with at least two equal CS resources; an indication module, configured to generate control signaling and deliver the control signaling to the UE, where the control signaling contains configuration indication information, and the configuration indication information indicates the combinable configuration of the CS and OCC sequence that it is selected by the configuration selection module and is required to generate respective DMRS strings from the UE transmission layers to transmit uphill link data.
[0014] User equipment, including: a reception module, configured to receive control signaling containing configuration indication information delivered by an access network device, where configuration indication information indicates a combinable CS configuration and OCC sequence that is required to generate respective DMRS sequences of transmission layers of a UE to transmit uphill link data, the combination configuration is selected by the access network device, based on a specified number of transmission layers of the UE to transmit uphill link data, from a multiple items of preset combinable configurations of CS and OCC sequence, and the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings; a configuration determination module, configured to determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information contained in the control signal received by the control module reception, where the combinable configuration is selected by the access network device and is required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data, and the combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings; a generation module, configured to generate the respective DMRS sequences from the UE transmission layers to transmit uplink data using CS and OCC sequence corresponding to the combinable configuration determined by the configuration determination module.
[0015] A computer program product on an access network device, configured to store the executable indications of the access network device, where the computer program product includes: computer-readable storage media, including: a first code, configured to activate a computer to determine the number of transmission layers of User Equipment (UE) to transmit uphill link data; a second code, configured to activate a computer to select, based on the determined number of transmission layers, a combinable Cyclic Shift (CS) configuration and Orthogonal Cover Code (OCC) sequence that is required to generate respective Signal sequences Demodulation Reference (DMRS) of the UE transmission layers to transmit uphill link data, from one of multiple items of preset combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings, and where a first configuration condition is satisfied among the predefined combinable configuration items, and the first configuration condition includes that different OCC sequences are configured between the items of combinable configurations that are configured with pel at least two equal CS resources; a third code, configured to activate a computer to generate control signaling and deliver the control signaling to the UE, where the control signaling contains configuration indication information, and the configuration indication information indicates the selected combinable configuration of the CS and OCC sequence that is required to generate respective DMRS sequences from the transmission layers of the UE to transmit uphill link data.
[0016] A computer program product on an access network device, configured to store the executable indications of the access network device, where the computer program product comprises: computer-readable storage media, including: a first code, configured to activate a computer to receive control signaling containing configuration indication information delivered by an access network device, where the configuration indication information indicates a combinable configuration of Cyclic Displacement (CS) and sequence of Orthogonal Cover Codes (OCC) that is required to generate respective Demodulation Reference Signal (DMRS) strings from User Equipment (UE) transmission layers to transmit uphill link data, the combination setting is selected by the access network device, based on a specified number of transmission layers of the UE to transmit uplink data, from one of multiple items of preset combinable configurations of CS and OCC sequence, and the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate r respective DMRS sequences of transmission layers; a second code, configured to activate a computer to determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information contained in the control signal received by the module of reception, where the combinable configuration is selected by the access network device and is required to generate respective DMRS sequences of transmission layers of the UE to transmit uphill link data, and the combinable configuration items are defined with respect to the maximum number transmission layers supported by the system and are required to generate respective transmission layer DMRS strings; a third code, configured to activate a computer to generate the respective DMRS strings from the UE transmission layers to transmit uphill link data using CS and OCC sequence corresponding to the combinable configuration determined by the configuration determination module.
[0017] A computer-readable storage medium applicable to an access network device or user equipment in a communication system, where the storage medium is configured to store multiple items of preset combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings, and where a first configuration condition is satisfied between the predefined combinable configuration items, and the first condition Configuration options include that different OCC strings are configured among the combinable configuration items that are configured with at least two equal CS features.
[0018] It can be seen from the above that the modalities of the present invention can only preset multiple items of combinable configurations of CS and OCC sequence with respect to the maximum number of transmission layers supported by the system, where the items of combinable configurations are required to generate respective transmission layer DMRS sequences; and the combinable configuration of CS and OCC sequence required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data is a configuration subset of one of the multiple items of predefined combinable configurations. This mode of implementation can simplify the complexity of describing standardization with respect to generating combinable configurations of CS resources and OCC sequence usable to generate DMRS, and is relatively easy for standardization and systematic implementation. Establishing configuration conditions for the CS resource and OCC sequence configuration modes in the respective preset combinable configuration items is beneficial in reducing DMRS interference between code words. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In the description which follows, drawings to be used to explain the modalities of the invention or the prior art are described briefly to explain the technical solutions of the modalities of the present invention or the prior art more clearly. Obviously, the drawings as described in the following show only a few embodiments of the present invention. For those skilled in the art, other designs are easily obtainable according to these designs, without any creative effort.
[0020] Figure 1 is a schematic diagram of the DMRS pilot frequency structure of a UTE Rel-8 uplink link; Figure 2 is a flow chart of a method of configuring resources of a demodulation reference signal according to an embodiment of the present invention; Figure 3 is a schematic diagram of an access network device according to an embodiment of the present invention; Figure 4 is a schematic diagram of user equipment according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE MODALITIES
[0021] The embodiments of the present invention provide a relevant method and device for configuring resources for a demodulation reference signal, which can simplify the complexity of describing the specification regarding the combinable CS configuration and OCC sequence that are required to generate DMRS, and can reduce interference between code word DMRSs.
[0022] In order to make the purpose, features and benefits of the present invention clearer and easier to understand, the foregoing makes reference to the figures of the modalities of the present invention to clearly describe the technical solutions of the modalities of the present invention. Of course, the modalities described in this document are only a part and not all of the modalities of the present invention. All other modalities made without any creative effort by a person of ordinary skill in the art, based on the modalities of the present invention, are included in the scope of protection of the present invention. First Mode
[0023] In the description that follows, an embodiment of the method of configuring the resources of a demodulation reference signal of the present invention is described from the appearance of an access network device. The method may include: determining the number of User Equipment (UE) transmission layers to transmit uphill link data; select, based on the determined number of transmission layers, a combinable Cyclic Shift (CS) configuration and Orthogonal Cover Code (OCC) sequence that is required to generate respective Demodulation Reference Signal (DMRS) sequences from the layers of UE transmission to transmit uphill link data, from one of multiple items of preset combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective transmission layer DMRS strings, and where a first configuration condition is satisfied among several items of the predefined combinable configuration items, and the first configuration condition comprises that different OCC sequences are configured among the combinable configuration items that are configured with at least two equal CS resources; generate a control signal and deliver the control signal to the UE, where the control signal contains configuration indication information, and the configuration indication information indicates the selected combinable configuration of the CS and OCC sequence resources that is required to generate respective DMRS sequences from the transmission layers of the UE to transmit uphill link data.
[0024] Referring to figure 2, specific steps may include: 210: An access network device determines the number of transmission layers of a UE to transmit uphill link data.
[0025] In practice, the access network device can determine the number of transmission layers of the UE to currently transmit uplink data based on actual needs and the maximum number of transmission layers supported by the system, where the determined number of layers transmission rate is equal to or less than the maximum number of transmission layers supported by the system.
[0026] 220: The access network device selects, based on the determined number of transmission layers, a combinable configuration of CS and OCC sequence that is required to generate respective DMRS sequences from the UE transmission layers to transmit uphill link data, of one of multiple items of preset combinable configurations of CS and OCC sequence. The combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective DMRS strings of transmission layers.
[0027] In an application scenario, the multiple items of combinable configurations of CS and OCC sequence required to generate respective transmission layer DMRS strings can be predefined in the access and UE network with respect to the maximum number of transmission layers supported by the system. The multiple items of predefined combinable configurations can be saved in a DMRS resource configuration table (or saved in another way), and each of the combinable configuration items is saved as an entry in the DMRS resource configuration table.
[0028] A first configuration condition is satisfied among the predefined combinable configuration items.
[0029] The first configuration condition comprises that different OCC sequences are configured among the combinable configuration items that are configured with at least two equal CS resources.
[0030] In addition, each of the preset combinable configuration items can satisfy a second configuration condition or a third configuration condition. The second configuration condition comprises that, in a combinable configuration item, the spacing between CS resources corresponding to the transmission layers mapped to the same code word (for example, two transmission layers can be mapped to the same code word) is greater than the spacing between CS resources corresponding to the transmission layers mapped to different code words. The third configuration condition comprises that, in a combinable configuration item, if the spacing between CS resources corresponding to different transmission layers mapped to the same code word is less than the spacing between CS resources corresponding to the transmission layers mapped to different words codes, then the different transmission layers mapped to the same code word are configured with different OCC sequence resources.
[0031] The access network device can select, based on the determined number of transmission layers and the current communication status, a combinable configuration of CS and OCC sequence that is required to generate respective DMRS sequences from the UE transmission layers to transmit data uplink link, from one of multiple items of preset combinable configurations of CS and OCC sequence. The combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings. That is, the selected combinable configuration is a configuration subset of one of the multiple items of predefined combinable configurations.
[0032] For example, if the maximum number of transmission layers supported by the system is 4, and the number of transmission layers of the UE to transmit uphill link data is 2, the access network device can select a combinable CS configuration and OCC sequence that is required to generate 2-layer DMRS transmission strings from the UE to transmit uphill link data, from one of multiple items of preset CS combinable configurations and OCC sequence, where the items of combinable configurations are predefined with respect to 4 transmission layers and are required to generate respective transmission layer DMRS strings.
[0033] In practice, to perform resource configuration more flexibly, the mapping relationship between the number of transmission layers and the transmission layer selection modes can be predefined (for example, this mapping relationship can be configured dynamically or semi-statically) UE or access network device). Based on the different transmission layer selection modes, the combinable CS configuration and OCC sequence that is selected from one of the preset combinable configuration items may be different. For example, if it is determined that the number of transmission layers of the UE to transmit uplink data is 2, the access network device may select, based on a certain transmission layer selection mode, a combinable configuration of CS and OCC sequence corresponding to transmission layers 0 and 1, of one of the preset combinable configuration items, and use the selected combinable configuration as the combinable configuration of CS and OCC sequence corresponding to transmission layers 0 and 1 of the UE to transmit uphill link data. Alternatively, the access network device may select, based on another transmission layer selection mode, a combinable configuration of CS and OCC sequence corresponding to transmission layers 0 and 2 (or transmission layers 0 and 3, or transmission layers 1 and 2, or transmission layers 2 and 3) of one of the predefined combinable configuration items, and use the selected combinable configuration as the combinable configuration of the CS and OCC sequence corresponding to the transmission layers 0 and 1 of the UE to transmit uplink data. The rest can be deduced by analogy for another number of transmission layers.
[0034] 230: The access network device generates control signaling and delivers control signaling to the UE. The control signaling contains configuration indication information, and the configuration indication information indicates the selected combinable configuration of the CS and OCC sequence that is required to generate respective DMRS sequences from the UE transmission layers to transmit uphill link data.
[0035] In an application scenario, different item numbers can be allocated to the multiple items of predefined combinable configurations, and different items of combinable configurations can be differentiated by the item numbers.
[0036] The configuration indication information contained in the control signaling indicated above can include: the determined number of transmission layers, and an item number corresponding to the combinable configuration item from which the combinable configuration of CS resources and OCC sequence required to generate respective DMRS sequences of the transmission layers of the UE to transmit uphill link data is selected. The UE can determine, based on the item number and the number of transmission layers, the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence, where the combinable configuration is selected by the device access network and is required to generate respective DMRS transmission layer strings from the UE to transmit uphill link data, and combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable for generate respective DMRS sequences of transmission layers. It can be understood that the configuration indication information contained in the preceding control signaling may be another information capable of informing the UE of the corresponding combinable configuration indicated.
[0037] In an application scenario, the UE receives the control signal containing the configuration indication information delivered by the access network device. The configuration indication information is used to indicate the combinable configuration of CS and OCC sequence that is required to generate respective DMRS sequences of transmission layers of the UE to transmit uphill link data. The combinable configuration is selected by the access network device, based on the determined number of transmission layers, from one of multiple items of preset combinable configurations of CS and OCC sequence, and the items of combinable configurations are defined with respect to the maximum number transmission layers supported by the system and are required to generate respective transmission layer DMRS strings. The UE determines the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information, where the combinable configuration is selected by the access network device and is required to generate respective DMRS transmission layer strings from the UE to transmit uphill link data, and combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective layer DMRS strings transmission. The UE then generates the respective DMRS strings from the UE's transmission layers to transmit uphill link data using CS and OCC sequence corresponding to the determined combinable configuration.
[0038] Additionally, the access network device may indicate a DMRS sequence group hopping mode used by the UE, when using the OCC sequence features in the selected combinable configuration required to generate DMRS strings from the respective transmission layers of the UE to transmit data from climb link. If the OCC sequence resources in the selected combinable configuration required to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data are the same, the access network device may indicate a DMRS sequence group hop mode between subframes adopted by the EU. If the OCC sequence resources in the selected combinable configuration required to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data are different, the access network device may indicate a DMRS sequence group hopping mode between intervals (or a DMRS sequence group jump mode between subframes). In such a case, the UE may determine a DMRS sequence group hopping mode based on the OCC sequence resources determined in the selected combinable configurations which are usable to generate respective transmission layer DMRS sequences for transmitting uphill link data.
[0039] Furthermore, the mapping relationship between item numbers and DMRS sequence group hop modes can be predefined. The access network device can indicate a DMRS sequence group hopping mode for use by the UE, by using the item number contained in the configuration indication information, based on a mapping relationship between each of the items corresponding to the respective items of predefined combinable configurations and in a DMRS sequence group jump mode. The DMRS sequence group jump mode may include a DMRS sequence group jump mode between intervals, or a DMRS sequence group jump mode between subframes. In such a case, the UE may determine a DMRS sequence group hopping mode based on the item numbers contained in the configuration indication information on the received control signal.
[0040] Additionally, if the determined number of transmission layers of the UE is greater than 2, the access network device can indicate two HARQ feedback channel resources allocated to the UE, by using the CS resources that are in the selected combinable configuration and correspond to two layers of transmission adopting the same established available CS resource.
[0041] It can be understood that the technical solution of the present modality can be implemented specifically in the access network device. The access network device can be a base station, an evolution base station or other access network device having the capability of wireless access network.
[0042] As can be seen from the above, the present modality can only preset multiple items of combinable configurations of CS and OCC sequence with respect to the maximum number of transmission layers supported by the system, where the items of combinable configurations are required to generate respective transmission layer DMRS sequences; and the combinable configuration of CS and OCC sequence required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data is a configuration subset of one of the multiple items of predefined combinable configurations. This implementation can reduce the complexity of describing standardization with respect to generating the combinable configuration of CS and OCC sequence resources usable to generate DMRS. Defining configuration conditions for the CS and OCC sequence configuration modes in the respective preset combinable configuration items is beneficial for reducing DMRS interference between code words. Second Mode
[0043] In the description that follows, another embodiment of the method of setting the resources of a demodulation reference signal of the present invention is described from the aspect of user equipment. The method can include the following steps:
[0044] Receive control signaling including configuration indication information delivered by an access network device, where configuration indication information indicates a combinable configuration of CS resources and OCC sequence that is required to generate respective DMRS sequences from transmission layers of a UE to transmit uphill link data, the combination configuration is selected by the access network device, based on a specified number of transmission layers of the UE to transmit uphill link data, from one of multiple configuration items preset combinable CS and OCC sequence, and combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective transmission layer DMRS strings. Determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information, where the combinable configuration is selected by the access network device and is required to generate respective transmission layer DMRS strings of the UE to transmit uphill link data, and combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are usable to generate respective transmission layer DMRS strings. Generate the respective DMRS strings from the UE transmission layers to transmit uphill link data using CS and OCC sequence resources corresponding to the determined combinable configuration.
[0045] In addition, the UE may determine a DMRS sequence group hopping mode to be adopted, based on the OCC sequence in the determined combinable configuration. If configuration of OCC sequence resources corresponding to the respective transmission layers in the determined combinable configuration is the same, the UE determines a DMRS sequence group hopping mode between subframes to be adopted. If the configuration of OCC sequence resources corresponding to the respective transmission layers in the determined combinable configuration is different, the UE determines a DMRS sequence group hopping mode between intervals to be adopted.
[0046] In an application scenario, assume that the configuration indication information contained in the received control signaling comprises the number of transmission layers from the UE to transmit uphill link data, and an item number corresponding to the combinable configuration item of which the combinable configuration of CS resources and OCC sequence required to generate respective DMRS strings from the UE transmission layers to transmit uphill link data is selected. In such a case, if a mapping relationship established between each of the item numbers and a DMRS sequence group hopping mode is predefined, then the UE may determine a DMRS sequence group hopping mode, based on the number of item included in the configuration indication information on the control signal received.
[0047] Additionally, if the number of transmission layers to transmit uphill link data is greater than 2, then determine the two HARQ feedback channel resources allocated by the access network device, based on a mapping relationship between the resources of the access network. feedback channel HARQ and the CS resources that are in the selected combinable configuration and corresponding to two transmission layers adopting the same established available CS resource.
[0048] As can be seen from the above, the present modality can only preset multiple items of combinable configurations of CS and OCC sequence with respect to the maximum number of transmission layers supported by the system, where the items of combinable configurations are required to generate respective transmission layer DMRS sequences; and the combinable configuration of CS and OCC sequence required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data is a configuration subset of one of the multiple items of predefined combinable configurations. This implementation can reduce the complexity of describing standardization with respect to generating the combinable configuration of CS and OCC sequence resources usable to generate DMRS. Defining configuration conditions for the CS and OCC sequence configuration modes in the respective preset combinable configuration items is beneficial for reducing DMRS interference between code words. Third Mode
[0049] To help better understand the technical solutions of the modalities of the present invention, in the following, multiple items of predefined combinable configurations of CS and OCC resources are described, where the items of combinable configurations are defined with respect to the maximum number of transmission layers. supportable by the system and are usable to generate respective transmission layer DMRS strings. Furthermore, a combinable configuration of CS resources and OCC sequence required to generate respective UE transmission layer DMRS strings to transmit uphill link data is a configuration subset of one of the multiple items of predefined combinable configurations.
[0050] For example, the maximum number of transmission layers supported by the system is 4, that is, the maximum rating value is 4, the range of values for CS resource is 0 to 11, and the available OCC strings are {1, 1 }, {1, -1}. Table 2 shows the items of combinable configurations that are predefined in the access network device and in the user equipment with respect to the maximum number of transmission layers supported by the system, which are usable to generate respective DMRS sequences of transmission layers.
[0051] The following provides descriptions according to four scenarios. (1)
[0052] If the access network device determines that the number of transmission layers of the UE to transmit uplink data is 1, that is, rating = 1, the access network device can select, from Table 2 which is predefined, a combinable configuration of CS and OCC sequence that corresponds to any entry in Table 3, such as the combinable configuration of CS and OCC sequence required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data.
[0053] In table 3, the CS resource configuration corresponding to transmission layer 0 is the same as the LTE Rel-8 single transport layer DMRS CS resource configuration, which achieves backward compatibility and can well support the coexistence of LTE UEs. -Advanced and LTE Rel-8 on the same network.
[0054] To support MU-MIMO transmission, it is necessary to allocate different CS resources to the married UEs. In the CS configurations in Table 3, among the items of combinable configurations of CS = 2, 3, 4 and CS = 8, 9, 10, the spacing between CS resources is only 1. In the modality of the present invention, considering that in a channel environment having significant delay time, the orthogonality between the respective items of combinable configurations with relatively small CS resource spacing (less than a defined threshold spacing, for example, 1 or 2) cannot be ensured. Therefore, for CS resources with relatively small spacing, resources from different OCC sequences are configured to improve orthogonality. For example, the OCC sequence resource configured corresponding to CS = 3 is {1, -1}, and the OCC sequence corresponding to CS = 2 and 4 is {1, 1}. For example, the OCC sequence resource configured corresponding to CS = 9 is {1, -1}, and the OCC sequence resource corresponding to CS = 8 and 10 is {1, 1}. Because the spacing between other CS configurations are all equal to or greater than 2, orthogonality between respective items of combinable configurations is ensured.
[0055] Additionally, if the protection for the respective items of configurable configurations with CS spacing of 2 is to be improved, modification can be made; for example, the OCC sequence resource configured corresponding to CS = 0 and CS = 6 in Table 3 can be changed to {1, -1}, for example. (two)
[0056] If the access network device determines that the number of transmission layers of the UE to transmit uphill link data is 2, that is, rating = 2, the access network device can select, from Table 2 which is predefined, a combinable configuration of CS and OCC sequence corresponding to any entry in Table 4, such as the combinable configuration of CS and OCC sequence required to generate respective transmission layer DMRS strings from the UE to transmit uphill link data.
[0057] In table 4, the CS spacing of the two transmission layers (the transmission layers 0 and 1) in any combinable configuration is 6, that is, the maximum spacing within the CS value range, which can achieve an ideal CS orthogonality .
[0058] In practice, considering MU-MIMO scaling, married UEs need to achieve DMRS orthogonality through OCC sequences. So, for the two transmission layers of the same UE, DMRS orthogonality cannot be achieved when using OCC strings. For example, transmission layer 0 and transmission layer 1 can use the same OCC sequence.
[0059] In Table 4, there is also a situation where different items of combinable configurations contain equal CS resources corresponding to different transmission layers. For example, in combinable configuration items corresponding to item numbers 0 and 1 in Table 4, the configured CS resources are {0, 6} and {6, 0}, respectively. In combinable configuration items corresponding to item numbers 2 and 7, the configured CS resources are {3, 9} and {9, 3}, respectively. For respective items of combinable configurations containing equal CS resources, the OCC sequence configured accordingly can be established to be orthogonal between layers. For example, in the combinable configuration item corresponding to an item number 0, the OCC strings used by the two transmission layers can be established to be {1, 1} and {1, 1}, respectively, while in the configuration item combinable corresponding to an item number 1, the OCC strings used by the two transmission layers can be established to be {1, 1} and {1, -1}, respectively. In this way, for the transmission of two layers from a single UE, the DMRS orthogonality between layers can be achieved in a better way. For UEs with relatively significant channel delay time, a different OCC sequence can be configured for different transmission layers. In addition, to enable configuration items containing equal CS resources to support MU-MIMO transmission, different OCC resources can be used for these configuration items. For example, in the combinable configuration item corresponding to item number 0, the OCC strings used by the two transmission layers can be established to be {1, 1} and {1, 1}, respectively, and in the combinable configuration item corresponding to an item number 1, the OCC strings used by the two transmission layers can be set to be {1, 1} and {1, -1}, respectively. (3)
[0060] If the access network device determines that the number of transmission layers of the UE to transmit uplink data is 3, that is, rating = 3, the access network device can select, from Table 2 which is predefined, a combinable CS configuration and OCC sequence corresponding to any entry in Table 5, such as the combinable configuration of CS resources and OCC sequence required to generate respective UE transmission layer DMRS strings to transmit uphill link data.
[0061] In Table 5, the CS spacing between the transmission layer 0 and the transmission layer 1 in each combinable configuration is 6, equal to the CS spacing of the classification = 2. The CS spacing between the transmission layer 2 and the transmission layer 0 and the CS spacing between the transmission layer 2 and the transmission layer 1 are all 3. This spacing is the maximum configurable spacing within the CS value range and achieves optimal CS orthogonality. In such a case, the CS spacing between any two different transmission layers is different, and different OCC sequences from OCC sequences from other transmission layers can be configured for the transmission layers having relatively small CS spacing with respect to other transmission layers, to improve the orthogonality of your DMRS strings. Furthermore, to support MU-MIMO scaling with OCC orthogonality, multiple transmission layers from the same UE need to use the same OCC sequences. To satisfy the demands for DMRS orthogonality between single UE MIMO layers and DMRS orthogonality between MU-MIMO UEs, different OCC sequence configuration modes can be used in the configuration items containing the same CS resources or in a part of the configuration items containing the same CS resources. For example, if both items of combinable configurations corresponding to item number 0 and item number 1 contain the resource CS {0, 6}, then define in the combinable configuration item corresponding to item number 0 that different layers of transmission use identical OCC strings, and in the combinable configuration item corresponding to item number 1 that the OCC sequence for transmission layer 2 is different from the OCC sequences for the other two transmission layers. Similarly, to enable configuration items containing equal CS resources to support MU-MIMO transmission, different OCC resources can be used for these configuration items. For example, in the combinable configuration item corresponding to item number 0, it can be defined that the OCC strings used by the three transmission layers are all {1, 1}, whereas in the combinable configuration item corresponding to item number 2, it can be defined that the OCC sequences used by two transmission layers are all {1, -1}. (4)
[0062] If the access network device determines that the number of transmission layers of the UE to transmit uplink data is 4, that is, rating = 4, the access network device can select, from Table 2 which is predefined, a combinable configuration of CS and OCC sequence corresponding to any one input, such as the combinable configuration of CS and OCC sequence required to generate respective transmission layer DMRS strings from the UE to transmit uphill link data. The settings of CS and OCC resources corresponding to the transmission layers 0 to 2 are the same as the settings of the classification = 3.
[0063] According to the mapping relationships between the LTE-Advanced transmission layers and code words, transmission layers 0 and 1 are mapped to the code word 0, and transmission layers 2 and 3 are mapped to the code word 1 .
[0064] It can be seen that, in Table 2, the CS spacing between the two transmission layers mapped to the same code word under each combinable configuration is 6. This arrangement enables the CS spacing between the transmission layers to be still the maximum when a single code word is retransmitted non-adaptively. Therefore, the orthogonality of the retransmitted DMRS resources is ensured.
[0065] Additionally, in Table 2, the CS spacing between the transmission layers mapped to different code words is 3, which is less than the CS spacing between the two transmission layers mapped to the same code word (that is, a second condition of configuration is satisfied). Therefore, OCC strings can be used to improve orthogonality.
[0066] To support MU-MIMO scaling with OCC sequence orthogonality, configurations where different transmission layers use the same OCC sequences are also required. Therefore, different OCC sequence resource configuration modes can be used in the respective combinable configuration items containing at least two equal CS resource configurations (containing completely or partially equal CS resource configurations). For example, in Table 2, all items of combinable configurations corresponding to item numbers 0 and 1 contain the resource CS {0, 3, 6, 9}, then, in the combinable configuration item corresponding to item number 0, layers Different transmission units use the same OCC sequence resources, and in the combinable configuration item corresponding to item number 1, the OCC sequence configured for transmission layers 2 and 3 is different from the OCC sequence configured for transmission layers 0 and 1.
[0067] The access network device can generate control signaling and deliver the control signaling to the UE. The control signaling may contain configuration indication information which is used to indicate the selected combinable configuration of CS resources and OCC sequence required to generate respective DMRS strings from the UE transmission layers to transmit uphill link data.
[0068] The configuration indication information can comprise the determined number of transmission layers, and the item number corresponding to the combinable configuration item (any one from 0-7) from which the combinable configuration of CS resources and OCC sequence required to generate respective DMRS sequences of the transmission layers of the UE to transmit uphill link data is selected.
[0069] The UE receives the control signal that contains the configuration indication information and which is delivered by the access network device; determines the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information (number of transmission layers and an item number corresponding to a combinable configuration item selected), in which the combinable configuration is selected by the access network device and is required to generate respective DMRS strings of UE transmission layers to transmit uphill link data, and the combinable configuration items are defined with respect to the number maximum transmission layers supported by the system and are required to generate respective transmission layer DMRS strings; generates the respective DMRS strings of the UE transmission layers to transmit uplink data using CS and OCC sequence corresponding to the combinable configuration determined by the configuration determination module. Fourth Mode
[0070] In the present modality, multiple items of combinable configurations of CS and OCC resources usable to generate the respective transmission layer DMRS sequences are predefined with respect to the maximum number of transmission layers supported by the system.
[0071] In the respective items of combinable configurations, different features of OCC strings are configured between items of combinable configurations with relatively small CS spacing, to improve DMRS orthogonality.
[0072] For example, as shown in Table 6, with respect to Table 2, when classification = 1, different OCC strings are used for respective items of combinable configurations with CS spacing being less than 3. The CS and OCC resource configuration modes corresponding to other classification values are similar to those of the third modality.
[0073] The processing modes of the access network device and the UE of the present modality can be learned by referring to the relevant description in the third modality and, therefore, are not described in this document. Fifth Mode
[0074] In the present modality, multiple items of combinable CS configurations and OCC resources required to generate the respective transmission layer DMRS sequences are predefined with respect to the maximum number of transmission layers supported by the system.
[0075] The respective preset combinable configuration items satisfy that different OCC sequences are configured among the combinable configuration items containing at least two equal CS resources (the first configuration condition). This mode can be used to optimize DMRS orthogonality between layers of a single UE, and achieve DMC OCC orthogonality between MU-MIMO UEs.
[0076] For example, as shown in Table 7, when the rating = 2, combinable configuration items containing identical CS resources use different OCC sequence resource configuration modes.
[0077] As shown in Table 7, to conclude that the combinable configurations for the small classification values are a configuration subset of the combinable configurations for the large classification values, in a predefined combinable configuration item, the same or different OCC sequences can be defined for the transmission layers with the same CS resources, such as the configuration items corresponding to the numbers 1, 5, 6, 7.
[0078] The processing modes of the access network device and the UE of the present modality can be learned by referring to the relevant description in the third modality and, therefore, are not described in this document. Sixth Mode
[0079] In the present mode, to achieve resource configuration more flexibly, a mapping relationship between the numbers of transmission layers and the transmission layer selection modes can be predefined (that is, the same or different selection modes of the transmission layer) corresponding to different classification values are predefined respectively). This can ensure that, under different classification values, the same transmission layer numbers can use the same or different CS and OCC resource configurations.
[0080] Under different classification values, the same transmission layer numbers correspond to the scenario of using the same CS and OCC resource configurations, that is, performing the selection of the number of small transmission layers for the number of large transmission layers.
[0081] For example, in the combinable configuration item where classification = 4 is predefined, the combinable configuration of CS resources and OCC sequence of your transmission layer 0 is also the CS and OCC configuration used by transmission layer 0 selected under classification = 1, rating = 2 and rating = 3, your transmission layer 1 setting is also the CS and OCC resource setting used by transmission layer 1 selected under rating = 2 and rating = 3.
[0082] Where, under different classification values, identical transmission layer numbers correspond to the scenario of using different CS and OCC resource configurations, that is, not performing the selection of the number of small transmission layers for the number of large transmission layers .
[0083] For example, the combinable configuration of CS and OCC sequence for rating = 1 can be defined as the configuration of CS and OCC resources used by transmission layer 0, or transmission layer 1, or by other transmission layers in the configuration items preset combinable.
[0084] The CS resource and OCC sequence setting for rating = 2 is defined as the CS and OCC resource setting used by transmission layers 0 and 1, 2 or 3, or transmission layers 1 and 2, or by a combination of two other different transmission layers in the preset combinable configuration items.
[0085] The CS resource and OCC sequence setting for rating = 3 is defined as the CS and OCC resource setting used by transmission layers 0, 1, 2 or transmission layers 2, 3, 4 or transmission layers 1, 3, 4 or by a combination of three other different transmission layers in the predefined resource configurations.
[0086] The system can simultaneously support multiple mapping relationships between the number of transmission layers and the transmission layer selection modes. The access network device can inform the UE or the network about the mapping relationship currently used between the number of transmission layers and the transmission layer selection modes, in a dynamic or semi-static configuration mode. Seventh Mode
[0087] In the present embodiment, the access network device indicates to the UE the DMRS sequence group hop modes.
[0088] In an application scenario, when OCC orthogonality is used, a DMRS sequence group jump mode between intervals is not used. In such a case, a DMRS sequence group hopping mode between subframes can be used to maintain DMRS interference between random cells. The access network device can allocate sequence group hop between intervals and sequence group hop between different subframes or UEs, respectively, and notify the UEs by means of control signaling.
[0089] The DMRS sequence group hop mode setting can also be configured, along with CS and OCC features, as a part of the access network device's DMRS feature setting.
[0090] The access network device may indicate a DMRS sequence group hopping mode to be adopted by the UE, when using the OCC sequence features in the selected combinable configuration required to generate the DMRS strings from the respective transmission layers of the UE to transmit data uplink link.
[0091] For example, as shown in Table 8, if the OCC sequence resource in the selected combinable configuration required to generate the respective DMRS strings from the UE transmission layers to transmit uphill link data, selected by the access network device, is the same (or the combinable configuration with the same OCC sequence used by all transmission layers), then indicate to the UE to adopt the DMRS sequence group jump mode between subframes.
[0092] If the OCC sequence resource settings required to generate the respective DMRS streams from the UE transmission layers to transmit uphill link data, such as selected by the access network device, are different (or the configuration combinable with different OCC sequences used by all transmission layers), then indicate to the UE to adopt DMRS sequence group hopping mode between intervals or DMRS sequence group hopping mode between subframes.
[0093] In such a case, after determining the OCC sequence resource configuration required to generate the respective DMRS streams from its transmission layers to transmit uphill link data, the UE can determine the DMRS sequence group hopping mode based on the configuration Determined OCC.
[0094] For example, as shown in Table 8, items of combinable DMRS configurations with item numbers 0, 2, 3, 4 can be configured as the jump between subframes, and other items of combinable configurations can be configured as the jump between intervals (or the jump between subframes).
[0095] In addition, in real systems the maximum number of transmission layers of married MU-MIMO UEs is subject to a limit (for example, at most one transmission of classification = 2 can be performed). Therefore, sequence group hop modes can be defined according to the OCC settings of part of the transmission layers in DMRS resource settings. For example, DMRS sequence group hop modes can be set only according to the OCC settings of the transmission layer 0 and the transmission layer 1. If the OCC sequences of the two transmission layers are identical, then the jump between intervals or the jump between subframes can be configured. If the OCC sequences of the two transmission layers are different, then the jump between intervals can be configured. In the meantime, the items of combinable configurations of the DMRS resources, which are configured with the jump between subframes, must include configurations using different OCC sequences. As shown in Table 8, DMRS configurations with configuration numbers 0, 1, 4, 5 are configured with the jump between subframes, where the OCC used by configurations 0 and 1 is {1, -1}, the OCC used by configurations 4 and 5 is {1, 1}. For other specific CS and OCC configuration tables, the same principles can be followed to add sequence group hop mode settings.
[0096] In another application scenario, the mapping relationship between a DMRS sequence group jump mode and each of the item numbers of the respective items of predefined combinable configurations can be predefined. That is, under the same combinable configuration item, different rating values use identical sequence group hop modes. Also, these hop modes can be changed adaptively based on the OCC resource settings under respective rating values. In table 9, when rating = 1, 3 or 4, the sequence group hop mode settings as listed are used. When rating = 2, because different transmission layers in all resource configuration options use identical OCC sequences, all configuration options can use sequence group jump between subframes. Because the jump mode settings are decided by the OCC settings, adaptive changes in the sequence group hop modes under different rating values will not incur additional signaling overhead.
[0097] As can be seen from the above, in the present embodiment, the access network device can configure the group hop modes between UE OCC sequences without including additional signaling. Eighth Mode
[0098] In the present modality, the access network device indicates to the UE the resource locations of HARQ feedback channels.
[0099] When adopting UL MIMO transmission in an LTE-A system, it is necessary to allocate two HARQ feedback channels to a UE, each of the two HARQ feedback channels corresponding to a data transmission block.
[0100] Mapping relationships between CS resource configurations and CS resource numbers can be defined. The resource locations of HARQ feedback channels can be indicated to the UE when using CS resources that are in the selected combinable configuration and correspond to two transmission layers adopting the same defined available CS resource.
[0101] For example, in the respective modalities configuration tables indicated above, the set of available CS resources of transmission layers 0 and 1 is {0, 2, 3, 4, 6, 8, 9, 10}, and the item numbers of the combinable configuration items mapped by CS resources are different. A mapping relationship between CS resource configuration and CS resource number can be defined (for example, as shown in Table 10).
[0102] The access network device can indicate the two HARQ feedback channel resources allocated to the UE, using the CS resources that are in the selected combinable configurations and that correspond to two transmission layers adopting the same defined available CS resource. The UE can generate the CS resource numbers corresponding to the CS resource configurations of the transmission layers 0 and 1 (as shown in Table 11), respectively, based on the defined mapping relationship, apply the CS resource numbers to the equation of current HARQ feedback channel allocation, respectively, and the allocated HARQ feedback channel resources can be determined.
[0103] For example, when the access network device informs the UE to use the configuration item combinable with an item number 0, transmission layer 0 uses CS = 0 and transmission layer 1 uses CS = 6 in its configuration. corresponding CS resource. The UE can determine that the CS resource numbers corresponding to the CS resource configuration of the two transmission layers are 0 and 1 (as shown in Table 11), based on the mapping relationship between CS resource configurations and CS resource numbers defined in Table 10. The UE can apply the numbers of CS resources to the current HARQ feedback channel allocation equation, respectively, and determine the HARQ feedback channel resources as allocated by the access network device.
[0104] It can be understood that, if the CS resource configured for transmission layer 0 is identical to the CS resource in the LTE system, and the mapping relationship defined between the CS resource configurations and the CS resource numbers is identical to that defined in the LTE system, so MU-MIMO scheduling can be well achieved for LTE and Advanced LTE, and conflicts will not occur between the allocated HARQ feedback channels.
[0105] As can be seen from the above, in the present embodiment, the access network device can indicate to the UE two layers of HARQ feedback channels using CS resource configurations, without including additional signaling.
[0106] In the modalities previously exposed, the respective modalities are described with respective focuses, and a part not described in detail in a certain modality can be found in the relevant description of other modalities.
[0107] In summary, the solutions of the modalities of the present invention can preset only multiple items of combinable configurations of CS resources and OCC sequence with respect to the maximum number of transmission layers supported by the system, where the items of combinable configurations are usable to generate respective sequences Transmission layer DMRS; and the combinable configuration of CS and OCC sequence required to generate respective DMRS streams of transmission layers from the UE to transmit uphill link data is a configuration subset of one of the multiple items of predefined combinable configurations. This mode of implementation can simplify the complexity of describing standardization with respect to generating the combinable CS configuration and OCC sequence usable to generate DMRS, and it is easy for both standardization and systematic implementation.
[0108] In the meantime, defining the respective configuration conditions for CS resource and OCC sequence configuration modes in the respective combinable configuration items is useful to reduce DMRS interference between code words. This optimizes the DMRS orthogonality between different transmission layers in a single UE MIMO transmission, while at the same time supporting the DMRS of a UE in a MU-MIMO transmission to use OCC orthogonality.
[0109] In addition, the access network device can configure CS sequence group hop modes of the UE, without including additional signaling.
[0110] Additionally, the access network device can indicate to the UE two layers of HARQ feedback channels using CS resource configurations, without including additional signaling.
[0111] In order to better implement the technical solutions of the previously indicated modalities of the present invention, the modalities of the present invention additionally provide devices corresponding to the technical solutions of the previously indicated modalities of the present invention.
[0112] Referring to Figure 3, an access network device 300 provided by the embodiments of the present invention includes: a determination module 310, configured to determine the number of transmission layers of a UE for transmitting uphill link data; a configuration selection module 320, to select, based on the number of transmission layers as determined by determination module 310, combinable CS cyclic displacement configurations and OCC Orthogonal Cover Code sequence required to generate DMRS strings of respective layers UE transmission data to transmit uphill link data, from a combinable configuration item to multiple items of combinable CS configurations and OCC sequence that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable to generate sequences of DMRS demodulation reference signals from the respective transmission layers; wherein a first configuration condition is satisfied among the respective predefined combinable configuration items, the first configuration condition including that respective combinable configuration items containing at least two identical CS resource configurations use resource configurations from different OCC strings; an indication module 330, to generate and deliver to the UE a control signal containing configuration indication information, the information of which is used to indicate the combinable CS and OCC sequence configurations necessary to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data, as selected by the configuration selection module 320.
[0113] In an application scenario, the respective predefined combinable configuration items also satisfy a second configuration condition or a third configuration condition.
[0114] Where the second configuration condition includes that, in a combinable configuration, the spacing between CS resources corresponding to different transmission layers mapped to the same code word is greater than the spacing between CS resources corresponding to the transmission layers mapped to different code words .
[0115] The third configuration condition includes that, in a combinable configuration item, if the spacing between CS resources corresponding to different transmission layers mapped to the same code word is less than the spacing between CS resources corresponding to the transmission layers mapped to code words different, then the different transmission layers mapped to the same code word are configured with a different OCC sequence.
[0116] In an application scenario, indication module 330 can be used additionally to indicate DMRS sequence group hop modes adopted by the UE, by using the selected OCC sequence resource configurations necessary to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data. Where, if the selected OCC sequence resource configurations required to generate DMRS streams from the respective transmission layers of the UE to transmit uphill link data are identical, indicate to the UE to use the DMRS sequence group hopping mode between subframes. If the selected OCC sequence resource settings required to generate DMRS strings from the respective transmission layers of the UE to transmit uphill link data are different, indicate to the UE to use the DMRS sequence group hopping mode between intervals.
[0117] In an application scenario, the configuration indication information includes the determined number of transmission layers, and the item number corresponding to the combinable configuration item selected from the multiple items of predefined combinable configurations.
[0118] Indicator module 330 can be used additionally to indicate, based on mapping relationships between item numbers corresponding to the respective items of predefined combinable configurations and DMRS sequence group hop modes, DMRS sequence group hop modes to be adopted by the UE, using the item numbers included in the configuration indication information.
[0119] In an application scenario, the configuration selection module 320 can be used specifically to select, according to the determined number of transmission layers, and based on a predefined mapping relationship between the number of transmission layers and modes of transmission. selection of a transmission layer, combinable CS configurations and OCC sequence necessary to generate DMRS strings from respective UE transmission layers to transmit uphill link data, from a combinable configuration item to multiple combinable CS and sequence configurations items OCC that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable to generate DMRS demodulation reference signal streams from the respective transmission layers.
[0120] In an application scenario, indication module 330 can be used in addition to indicate two HARQ hybrid auto-repeat request feedback channel resources allocated to the UE, using CS resource configurations corresponding to two selected transmission layers adopting collections of identical CS resources available, when the number of transmission layers as determined by determination module 310 is greater than 2.
[0121] It can be understood that the access network device 300 of the present modality can be similar to the access network devices of the method modalities mentioned above, and the functions of their respective functional modules can be implemented specifically according to the methods in the modalities of access. method mentioned above, which for this reason are omitted in this document.
[0122] Referring to figure 4, user equipment 400 provided by the modalities of the present invention, includes: a receiving module 410, configured to receive a control signal containing configuration indication information delivered by an access network device, configuration indication information to indicate combinable CS configurations and OCC sequence necessary to generate DMRS sequences from respective transmission layers of the UE for transmitting uphill link data, which are selected by the access network device, based on the determined number of transmission layers of the user equipment to transmit uphill link data, from a configuration item combinable of multiple items of combinable CS configurations and OCC sequence that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable to generate DMRS demodulation reference signal sequences from the respective transmission layers; a configuration determination module 420, configured to determine, based on the configuration indication information contained in the control signal received by the receiving module 410, combinable CS configurations and OCC sequence necessary to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data, such as selected by the access network device, from a combinable configuration item of multiple items of combinable configurations of CS and OCC sequence that are predefined, directed to the maximum number of bearable transmission layers by the system, and usable to generate DMRS demodulation reference signal sequences from the respective transmission layers; a generation module 430, configured to generate the DMRS sequences of the respective transmission layers of the UE to transmit uplink data, and to use the CS and OCC sequence corresponding to the combinable configurations as determined by the configuration determination module 420.
[0123] In an application scenario, the configuration determination module 420 can be used additionally to determine the DMRS sequence group hop modes to be used, based on the OCC sequence corresponding to the respective transmission layers in the determined combinable configuration. Where, if the OCC sequence resource configurations corresponding to the respective transmission layers in the determined combinable configuration are identical, then the DMRS sequence group hopping mode between subframes is determined for use. If the OCC sequence resource settings corresponding to the respective transmission layers in the determined combinable configuration are different, then the DMRS sequence group hopping between intervals is determined for use.
[0124] In an application scenario, the configuration determination module 420 can be used additionally to obtain the two HARQ feedback channel resources as allocated by the access network device, based on the mapping relationships between the feedback channel resources. Predefined HARQ and CS resources corresponding to two transmission layers adopting collections of identical CS resources available in the determined combinable configuration.
[0125] It can be understood that the user equipment 400 of the present modality can be similar to the UEs of the method modalities mentioned above, and the functions of their respective functional modules can be implemented specifically according to the methods in the method modalities mentioned above, which for this reason they are omitted from this document.
[0126] A person of ordinary skill in the art may realize that all or part of the steps in the respective methods of the modalities indicated above can be implemented by a program instructing pertinent hardware. The program can be stored on a computer-readable storage medium. The storage media can include ROM, RAM, magnetic disk or optical disk, etc.
[0127] In the foregoing, a method and relevant devices of configuring resources of a demodulation reference signal as provided by the modalities of the present invention are described in detail. Specific examples are used to expose the principles and implementations of the present invention. The description of the modalities indicated above is intended only to help understand the method and main point of the present invention. In the meantime, a person of ordinary skill in the art can modify the specific modalities and scope of application of the present invention, in accordance with the spirit of the present invention. In short, the contents of this description should not be interpreted as a limitation to the present invention.

权利要求:
Claims (20)
[0001]
Method of configuring the resources of a demodulation reference signal of an access network device, in which the method comprises: determining (210) the number of transmission layers of User Equipment, UE, to transmit uphill link data; select (220), based on the determined number of transmission layers, a combinable combination of Cyclic Shift, CS, and sequence of Orthogonal Cover Codes, OCC, which is required to generate respective Demodulation Reference Signal sequences, DMRS, of the UE transmission layers to transmit uphill link data, of one of multiple items of preset combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings, and where a first configuration condition is satisfied among the predefined combinable configuration items, and the first configuration condition comprises that different OCC sequences are configured between at least part of the combinable configuration items that are configured with at least two CS i features guais; generate (230) control signaling and deliver the control signaling to the UE, where the control signaling contains configuration indication information, and the configuration indication information indicates the selected combinable configuration of the CS and OCC sequence that is required to generate respective DMRS sequences from the transmission layers of the UE to transmit uphill link data; the method characterized by the fact that, each of the preset combinable configuration items also satisfies a second configuration condition; where the second configuration condition comprises that, in a combinable configuration item, the spacing between CS resources corresponding to the transmission layers mapped to the same code word is greater than the spacing between CS resources corresponding to the transmission layers mapped to code words many different.
[0002]
Method, according to claim 1, characterized by the fact that the configuration indication information comprises the determined number of transmission layers, and the item number corresponding to the combinable configuration item selected from the multiple items of predefined combinable configurations.
[0003]
Method according to claim 1, characterized by the fact that it additionally comprises: indicate the DMRS sequence group hop modes used by the UE, when using the selected OCC sequence resource configurations necessary to generate DMRS sequences from the respective transmission layers of the UE to transmit uphill link data; if the selected OCC sequence resource settings required to generate DMRS streams from the respective transmission layers of the UE to transmit uphill link data are identical, indicate to the UE to adopt the DMRS sequence group hopping mode between subframes, if the selected OCC sequence resource settings required to generate DMRS streams from the respective transmission layers of the UE to transmit uphill link data are different, indicate to the UE to adopt the DMRS sequence group hopping mode between intervals.
[0004]
Method according to claim 2, characterized by the fact that it additionally comprises: indicate a DMRS sequence group jump mode adopted by the UE, when using the item numbers included in the configuration indication information, based on a mapping relationship between item numbers corresponding to the respective items of predefined combinable configurations and modes of DMRS sequence group hops.
[0005]
Method, according to claim 1, characterized by the fact that select, based on the determined number of transmission layers, the combinable CS and OCC sequence configurations required to generate DMRS strings from the respective UE transmission layers to transmit uplink data from a combinable configuration item of multiple configuration items combinable CS and OCC sequence that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable to generate DMRS demodulation reference signal sequences from the respective transmission layers, comprises: select, based on the determined number of transmission layers, and based on a predefined mapping relationship between the number of transmission layers and transmission layer selection modes, combinable CS configurations and OCC sequence required to generate DMRS sequences from respective UE transmission layers for transmitting uphill link data, from a combinable configuration item of multiple items of combinable CS configurations and OCC sequence that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable for generate sequences of DMRS demodulation reference signals from the respective transmission layers.
[0006]
Method according to claim 1, characterized by the fact that it additionally comprises: if the determined number of transmission layers is greater than 2, then indicate two HARQ hybrid auto-repeat request feedback channel resources allocated to the UE, using the selected CS resource configurations corresponding to two transmission layers adopting resource collections Identical CS available.
[0007]
Method of configuring resources of a demodulation reference signal of a User Equipment, UE, in which the method comprises: receive control signaling containing configuration indication information delivered by an access network device, where configuration indication information indicates a combinable Cyclic Shift, CS, and Orthogonal Cover Code, OCC sequence, which is required to generate respective Demodulation Reference Signal, DMRS, sequences of User Equipment transmission layers, UE, to transmit uphill link data, the combination configuration is selected by the access network device, based on a number set of transmission layers of the UE to transmit uphill link data, of one of multiple items of preset combinable configurations of CS and OCC sequence, and the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS sequences; determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information, where the combinable configuration is selected by the access network device and is required for generate respective DMRS transmission layer strings from the UE to transmit uphill link data, and combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings ; generate the respective DMRS strings from the UE transmission layers to transmit uphill link data using CS and OCC sequence corresponding to the determined combinable configuration where a first configuration condition is satisfied among the predefined combinable configuration items, and the first configuration condition comprises that different OCC sequences are configured between at least a part of the combinable configuration items that are configured with at least two equal CS resources ; the method characterized by the fact that each of the preset combinable configuration items also satisfies a second configuration condition; where the second configuration condition comprises that, in a combinable configuration item, the spacing between CS resources corresponding to the transmission layers mapped to the same code word is greater than the spacing between CS resources corresponding to the transmission layers mapped to code words many different.
[0008]
Method, according to claim 7, characterized by the fact that, the configuration indication information comprises the determined number of transmission layers, and the item number corresponding to the combinable configuration item selected from the multiple items of predefined combinable configurations.
[0009]
Method according to claim 7, characterized by the fact that it additionally comprises: determining a DMRS sequence group hopping mode to be used, based on the OCC sequence corresponding to the respective transmission layers in the determined combinable configuration; if the OCC sequence resource configurations corresponding to the respective transmission layers in the determined combinable configuration are the same, determine a DMRS sequence group hopping mode between subframes to be used; if the OCC sequence resource settings corresponding to the respective transmission layers in the determined combinable configuration are different, determine a DMRS sequence group hopping mode between intervals to be used.
[0010]
Method according to claim 7, characterized by the fact that it additionally comprises: if the number of transmit layers to transmit uphill link data is greater than 2, obtain the two HARQ feedback channel resources allocated by the access network device, based on a predefined mapping relationship between feedback channel resources HARQ and CS resources corresponding to the two transmission layers using collections of available CS resources equal in the determined combinable configuration.
[0011]
Access network device, where the device comprises: a determination module (310), configured to determine the number of transmission layers of User Equipment, UE, for transmitting uphill link data; a configuration selection module (320), configured to select, based on the number of transmission layers determined by the determination module, a combinable Cyclic Shift, CS, and Orthogonal Cover Code sequence, OCC, which is required to generate respective Demodulation Reference Signal (DMRS) sequences from the UE transmission layers to transmit uphill link data, from one of multiple items of predefined combinable configurations of CS and OCC sequence, where the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings, and in which a first configuration condition is satisfied between the predefined combinable configuration items, and the first configuration condition includes that different OCC strings are configured between at least a portion of the c items combinable configurations that are configured with at least two equal CS features; an indication module (330), configured to generate control signaling and deliver the control signaling to the UE, where the control signaling comprises configuration indication information, and the configuration indication information indicates the combinable configuration of the CS and OCC sequence that is selected by the configuration selection module and is required to generate respective DMRS sequences from the UE transmission layers to transmit uphill link data; the device characterized by the fact that each of the respective items of preset combinable configurations also satisfies a second configuration condition; where the second configuration condition comprises that, in a combinable configuration item, the spacing between CS resources corresponding to the transmission layers mapped to the same code word is greater than the spacing between CS resources corresponding to the transmission layers mapped to code words many different.
[0012]
Access network device, according to claim 11, characterized by the fact that, the configuration indication information comprised in the control signal generated and delivered by the indication module comprises the number of transmission layers determined by the determination module, and the item number corresponding to the combinable configuration item selected by the configuration configuration module of the multiple items of preset combinable configurations.
[0013]
Access network device according to claim 12, characterized by the fact that the indication module is additionally configured to indicate a DMRS sequence group hopping mode used by the UE, when using an item number included in the information of configuration indication, based on a mapping relationship between item numbers corresponding to the respective items of predefined combinable configurations and DMRS sequence group hop modes.
[0014]
Access network device, according to claim 11, characterized by the fact that, the indication module is additionally configured to indicate a DMRS sequence group hopping mode used by the UE, when using the selected OCC sequence resource settings necessary to generate DMRS sequences from the respective transmission layers of the UE to transmit link data from climb; indicate a DMRS sequence group hopping mode between subframes used by the UE if the selected OCC sequence resource settings required to generate DMRS streams from the respective transmission layers of the UE to transmit uphill link data are the same, and indicate a DMRS sequence group hopping between intervals used by the UE if the selected OCC sequence resource configurations required to generate DMRS strings from the respective transmission layers of the UE to transmit uphill link data are different.
[0015]
Access network device according to claim 11, characterized by the fact that the configuration selection module is configured to select, based on the number of transmission layers determined by the determination module, a combinable configuration of CS and sequence OCC that is required to generate respective Demodulation Reference Signal, DMRS, strings from the UE transmission layers to transmit uphill link data, from one of multiple items of preset combinable configurations of CS and OCC sequence, where the items combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective DMRS sequences of transmission layers, and comprises: select, based on the determined number of transmission layers, and based on a predefined mapping relationship between the number of transmission layers and transmission layer selection modes, combinable CS configurations and OCC sequence required to generate DMRS sequences from respective UE transmission layers to transmit uphill link data, from a combinable configuration item to multiple items of combinable CS configurations and OCC sequence that are predefined, targeted to the maximum number of transmission layers supported by the system, and usable for generate sequences of DMRS demodulation reference signals from the respective transmission layers.
[0016]
Access network device according to claim 11, characterized in that, when the number of transmission layers determined by the determination module is greater than 2, the indication module is additionally configured to indicate two channel resources. HARQ hybrid automatic retry request feedback allocated to the UE, when using the selected CS resource configurations corresponding to two transmission layers adopting identical collections of available CS resources.
[0017]
User equipment, where the equipment comprises: a reception module (410), configured to receive control signaling containing configuration indication information delivered by an access network device, in which the configuration indication information indicates a combinable Cyclic Displacement, CS, and sequence of Orthogonal Cover Codes, OCC, which is required to generate respective Demodulation Reference Signal, DMRS, strings of User Equipment transmission layers, UE, to transmit uphill link data, the combination setting is selected by the device access network, based on a specified number of transmission layers of the UE to transmit uphill link data, from one of multiple items of preset combinable configurations of CS and OCC sequence, and the items of combinable configurations are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective DMRS strings transmission layers; a configuration determination module (420), configured to determine the combinable configuration of CS and OCC sequence from multiple items of predefined combinable configurations of CS and OCC sequence according to the configuration indication information contained in the control signal received by the receiving module, where the combinable configuration is selected by the access network device and is required to generate respective DMRS sequences of transmission layers of the UE to transmit uphill link data, and the combinable configuration items are defined with respect to the maximum number of transmission layers supported by the system and are required to generate respective transmission layer DMRS strings; a generation module (430), configured to generate the respective DMRS sequences of the UE transmission layers to transmit uplink data using CS and OCC sequence corresponding to the combinable configuration determined by the configuration determination module; where a first configuration condition is satisfied among the predefined combinable configuration items, and the first configuration condition comprises that different OCC sequences are configured between at least a part of the combinable configuration items that are configured with at least two equal CS resources ; the equipment characterized by the fact that, each of the preset combinable configuration items also satisfies a second configuration condition; where the second configuration condition comprises that, in a combinable configuration item, the spacing between CS resources corresponding to the transmission layers mapped to the same code word is greater than the spacing between CS resources corresponding to the transmission layers mapped to code words many different.
[0018]
User equipment according to claim 17, characterized by the fact that the configuration indication information comprises the determined number of transmission layers, and the item number corresponding to the combinable configuration item selected from the multiple items of predefined combinable configurations .
[0019]
User equipment according to claim 17, characterized by the fact that the configuration determination module is additionally configured for: determining a DMRS sequence group hopping mode to be used, based on the OCC sequence corresponding to the respective transmission layers in the determined combinable configuration; wherein, if in the combinable configuration determined the OCC sequence resource configurations corresponding to the respective transmission layers are identical, determine the DMRS sequence group hopping mode between subframes for use; if in the determined combinable configuration the OCC sequence resource settings corresponding to the respective transmission layers are different, determine the DMRS sequence group hopping mode between intervals for use.
[0020]
User equipment according to claim 17, characterized by the fact that the configuration determination module is additionally configured for: when the number of transmission layers to transmit uphill link data is greater than 2, obtain the two HARQ feedback channel resources allocated by the access network device, based on a predefined mapping relationship between feedback channel resources HARQ and CS resources corresponding to the two transmission layers adopting collections of identical CS resources available in the determined combinable configuration.

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同族专利:

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公开号 | 公开日

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JP2013543287A|2013-11-28|

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EP2587843A4|2013-07-03|

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EP2587843A1|2013-05-01|

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US20130114547A1|2013-05-09|

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WO2011085702A1|2011-07-21|

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EP2587843B1|2015-09-23|

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CN102300313B|2013-03-27|

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CN102300313A|2011-12-28|

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BR112012033717A2|2016-11-22|

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法律状态:
2018-10-02| B07A| Technical examination (opinion): publication of technical examination (opinion)|

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2019-02-05| B09B| Decision: refusal|

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2019-05-07| B12B| Appeal: appeal against refusal|

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2021-03-23| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 23/03/2021, OBSERVADAS AS CONDICOES LEGAIS. |

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