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    • 专利摘要:
      METHODS FOR CANCELING INTERFERENCE AT KEYWORD LEVEL WITH NETWORK ASSISTANCE.A method is proposed for a receiver to cancel or suppress cochannel interference with network assistance. The method comprises obtaining a first set of parameters related to interference signals in a mobile communication network; receiving a second set of parameters related to the network interference signals; and canceling the contribution of interference signals from the received signal based on the combination of the first set and the second set of parameters. In one embodiment, scrambling rules and resource block allocation information are flagged for the victim UE to facilitate Keyword Level Interference Cancellation (CWTC). While the scramble rule for control channel is based on specific EU identity, the scramble rule for data channel is based on cell specific identity or other network configurable identity to facilitate CWIC. In addition, RA allocation information is signaled to the victim UE in an efficient manner.
    公开号:BR112016012150A2
    申请号:R112016012150-3
    申请日:2014-11-27
    公开日:2020-09-01
    发明作者:Lung-Sheng Tsai；Xiangyang Zhuang；Pei-Kai Liao
    申请人:Mediatek Inc.；
    IPC主号:
    专利说明:

    [1] [1] This patent application claims priority under Title 35 of US Code §119 of US Provisional Patent Application No. 61 / 909,494, entitled "Methods for Interference Cancellation / Suppression with Network Assistance", filed November 27 2013, the subject of which is incorporated into this document by reference. TECHNICAL FIELD
    [2] [2] The revealed modalities refer in general to mobile communication networks and, more particularly, to methods for canceling / suppressing interference with network assistance. FUNDAMENTALS
    [3] [3] Long Term Evolution (LTE) is an improved universal mobile telecommunications system (UMTS) that provides higher data rate, lower latency and better system capacity. In LTE systems, an evolved universal terrestrial radio access network includes a plurality of base stations, called evolved Nodes-Bs (eNBs), which communicate with a plurality of mobile stations, called user equipment (UE). A UB can communicate with a base station or an eNB through the downlink and the uplink. The downlink (DL) refers to the communication from the base station to the UE. The uplink (UL) refers to the communication from the UE to the base station. LTE is generally marketed as 4G LTE, and standard LTE is developed by 3GPP.
    [4] [4] Beginning in April 2013, 3GPP initiated a new study item (SI), "Cancellation and Suppression of Network Assisted Interference" (NAICS), to investigate the benefit on system performance by leveraging the receiver's fitness interference cancellation.
    [5] [5] In the NAICS study item, several useful candidate parameters for canceling interference were identified. For example, parameters that are configured in the upper layer by current specifications (for example, transmission mode, cell ID, MBSFN subframes, CRS antenna ports, P1, PB); parameters that are dynamically signaled by current specifications (for example, CFI, PMI, RI, MCS, resource allocation, DMRS ports, n¡DRS used in TM1O); and other implementation related parameters (eg siror i. dç, CP, subframe / groove alignment). Although it is possible to let the receiver detect or estimate these parameters associated with the interference signal without any signaling aid, the cost of complexity could be too high to estimate them. The current LTE system provides sufficient signaling and reference signals that support only the channel estimation for the desired signal link, but not for the interference link. Solutions are sought to obtain the characteristics of interference or improved reliability to estimate these parameters. SUMMARY
    [6] [6] A method is proposed for a receiver to cancel or suppress cochannel interference with network assistance.
    [7] [7] In one embodiment, the interference signals comprise intracellular interference signals and / or intercellular interference signals. While intercellular interference comes from adjacent cells, intracellular interference comes from MU-MIMO transmission to other users in the same service cell as the victim UE.
    [8] [8] In another modality, scrambling rules and resource block allocation information are signaled to the victim UE to facilitate Keyword Level Interference Cancellation (CW1C). Although the scramble rule for the control channel is based on the specific EU identity, the scramble rule for the data channel is based on the cell specific identity or other configurable network identity to facilitate CWIC. In addition, RA allocation information is signaled to the victim UE in an efficient manner.
    [9] [9] Other modalities and advantages are described in the detailed description below. This summary is not intended to define the invention. The invention is defined by the claims. BRIEF DESCRIPTION OF THE DRAWINGS
    [10] [10] Figure 1 illustrates a mobile communication network with interference cancellation for both intercellular and intracellular interference according to an innovative aspect.
    [11] [11] Figure 2 is a diagram of blccus i: pl J _ u l of a base station and user equipment to carry out some embodiments of the present invention.
    [12] [12] Figure 3 illustrates functional blocks in a communication system that maps bits of information from a transport block to keywords and then maps to baseband signals for transmission.
    [13] [13] Figure 4 is a flow chart of an interference cancellation method from the perspective of the UE according to an innovative aspect.
    [14] [14] Figure 5 is a flow chart of an interference cancellation method from the perspective of eNB according to an innovative aspect.
    [15] [15] Figure 6 illustrates the signaling of scrambling rules to support CWIC.
    [16] [16] Figure 7 illustrates the signaling of resource allocation to support CWIC.
    [17] [17] Figure B is a flow chart of a CWIC method with network assistance from the perspective of the UE according to an innovative aspect.
    [18] [18] Figure 9 is a flow chart of a CWIC method with network assistance from the perspective of eNB according to an innovative aspect. DETAILED DESCRIPTION
    [19] [19] Reference will now be made in detail to some modalities of the invention, examples of which are illustrated in the accompanying drawings.
    [20] [20] Figure 1 illustrates a mobile communication network 100 with interference cancellation for both intercellular and intracellular interference according to an innovative aspect. The mobile communication network 100 is an OFDM network comprising a plurality of user equipment UE 101, UE 102 and UE 103, an eNB 104 service base station, and an adjacent eNB 105 base station. In the link-based LTE 3GPP system descendant OFDMA, the radio resource is partitioned into subframes in the time domain, each subframe being composed of two grooves and each groove having seven OFDMA symbols in the case of normal Cyclic Prefix (CP), or six OFDMA symbols in the case of extended CP. Each OFDMA symbol also consists of a number of OFDMA subcarriers in the frequency domain that depend on the system's bandwidth. The basic unit of the resource grid is called the Resource Element (RE), which extends an OFDMA subcarrier by an OFDMA symbol. Resource elements are grouped into resource blocks, where each resource block (RB) consists of 12 consecutive subcarriers in a slot.
    [021] [021] Several physical downlink channels and reference signals are defined to use a set of resource elements that carry information originating from higher layers. For downlink channels, the Downlink Shared Physical Channel (PDSCH) is the main downlink channel that supports LTE data, while the Downlink Control Physical Channel (PDCCH) is used to carry link control information. descending (DCI) in LTE. The control information can include programming decision, information related to reference signal information, rules that make up the corresponding transport block (TB) to be transported by the PDSCH, and power control command. For reference signals, Cell-specific reference signals (CRS) are used by UEs for demodulation of control / data channels in non-pre-coded or pre-coded transmission modes based on coding table, link monitoring, radio and channel state information feedback (CSI) measurements. UE-specific reference signals (DM-RS) by UEs are used for demodulation of control / data channels in pre-coded transmission modes not based on codebook.
    [22] [22] In addition to downlink channels, multi-user transmission of multiple inputs - multiple outputs (MU-MIMO) is becoming a new system technique to enable high system capacity in LTE networks. The base station must apply spatial filtering (pre-coding) of transmission, computed from the channel information acquired in the auscultation and feedback of the MU-MIMO downlink channel to obtain an orthogonal (or almost orthogonal) transmission from multiple streams to multiple users, that is, eliminating (or reducing) the amount of mutual interference between transmission to multiple mobile stations. According to this condition, each mobile station only receives the space flow (s) intended for itself and not the interference of the space flow (s) intended for other mobile stations.
    [23] [23] In the example in Figure 1, the UE 101 is served by its base service station eNB 104. The UE 101 receives the desired radio signal 111 transmitted by eNB 104. However, the UE 101 also receives radio interference signals. In one example, the UE 101 receives intracellular interference radio signal 112 transmitted from the same service eNB 104. Typically, such intracellular interference is due to the MU-MIMO transmission destined for other UEs (for example, UE 102 and UE 103 ) in the same service cell. In another example, the UE 101 receives intercellular interference radio signal 113 transmitted from the adjacent base station eNB 105. The UE 101 may be equipped with an interference cancellation (IC) receiver which is capable of canceling the contribution of the signals interference of the desired signals.
    [24] [24] In the study item "Cancellation and Suppression of Network Assisted Interference" (NAICS), several useful candidate parameters for interference cancellation were identified. For example, parameters that are configured in the upper layer by current specifications (for example, transmission mode, cell ID, MRS RN subframes, CRS, PA, PS antenna ports); parameters that are dynamically signaled by current specifications (for example, CFI, PMI, RI, MCS, resource allocation, DMRS ports, tt ~ p RS used in TM10); and other implementation-related parameters (eg, synchronization, CP, subframe / slot alignment). Although it is possible to let the receiver detect or estimate these parameters associated with the interference signal without any signaling aid, the cost of complexity could be too high to estimate them. In addition, since the characteristic of go and r. It is. , you can change for each PRB / subframe, dynamic signaling of all parameters is not feasible.
    [25] [25] In accordance with an innovative aspect, signaling methods are provided to support robust interference cancellation by obtaining information associated with interference signals from the network side and the way to use assistant signaling. The target interference for cancellation can be intercellular interference from adjacent cells or intracellular interference from MU-MIMO transmission. Target receiver types include both symbol-level IC (SLIC) and keyword-level IC (CWIC) receivers. The signaling methods mainly comprise 1) which parameters to signal, 2) how to signal a parameter (signaling format), and 3) limitations and restrictions on the transmission side.
    [026] [026] Figure 2 is a simplified block diagram of a base station 201 and user equipment 211 to carry out some modalities of the present invention on a mobile communication network 200. For base station 201, antenna 221 transmits and receives radio signals. The RF transceiver module 208, coupled to the antenna, receives RF signals from the antenna, converts them to baseband signals and transmits them to the 203 processor. The RE 208 transceiver also converts baseband signals received from the processor, converts them to RF signals, and transmits them to antenna 221. The 203 processor processes the received baseband signals and invokes different functional modules to execute resources on the base station 201. Memory 202 stores program instructions and data 209 to control base station operations. There is a similar configuration in UE 211 where antenna 231 transmits and receives RF signals. The RF transceiver module 218, coupled to the antenna, receives RF signals from the antenna, converts them to baseband signals and transmits them to processor 213. The RF transceiver 218 also converts baseband signals received from the processor, converts them into RF signals, and transmits them to antenna 231. The processor 213 processes the received baseband signals and invokes different functional modules to execute resources in the UE 211. Memory 212 stores program instructions and data 219 for control the operations of the UE.
    [027] [027] Base station 201 and UE 211 also include several functional modules to carry out some embodiments of the present invention. The different functional modules can be configured and implemented by software, firmware, hardware, or any combination of these. Functional modules, when executed by processors 203 and 213 (for example, via executable program codes 209 and 219), for example, allow base station 201 to program (via programmer 204), to code (via 205), map (via mapping module 206), and transmit control information and data (via control module 207) to the UE 211, and allow the UE 211 to receive, demap (via the demapper 216), and decode (by means of decoder 215) the control information and data (by means of control module 217) appropriately with interference cancellation capability. In one example, base station 201 provides assistance information that includes parameters related to interference signals for the UE 211. Upon receipt of the related parameters, the UE 211 is then able to perform interference cancellation via the IC 214 module for cancel the contribution of the interference signals accordingly.
    [29] [29] The mapping rules in these function blocks must be known for a receiving device to receive transport blocks. A UE receives a signal that supports information that propagates through a physical channel or wireless channel and processes it to recover the transport block. For the UE to receive TBs transported by PDSCH, it first needs to know the DCI transported by the PDCCH associated with these transport blocks. The DCI indicates the rules that map the information bits of each TB to the modulated symbols in the PDSCH, the RB allocation for the coded and modulated symbols of the transport blocks, information related to the reference signals used for channel estimation, and power control commands. The UE decodes the TBs based on the received control information and the configured parameters provided by the network.
    [30] [30] Although the UE receives and decodes information bits from the desired radio signals, the UE also receives unwanted radio interference signals. The UE therefore needs to cancel the contribution of the interfering signals from the desired signals. To improve reception performance through interference cancellation techniques, the key components that a receiver needs to know or estimate may include all or some of the following components: Cl) channel status information between the source of interference and the victim receiver; C2) resource block assignment (RB) of the interference signal; C3) modulation order (MOD) of the interference signal.
    [31] [31] Obtaining channel status information depends on the reference signals received and may require signaling help to know the pre-encoder used. For PDSCH transmission, the transmission mode could be either based on CRS or based on DMRS. For CRS-based transmission mode, the pre-encoder used by PDSCH is signaled to the receiver via the control channel. Pre-encoder information cannot be extracted from received cell-specific reference signals. On the other hand, for DMRS - based transmission mode, pre - coding is also applied in DMRS. The receiver directly estimates the composite channel formed by the propagation channel and the precoding vector / matrix used for further processing.
    [32] [32] While it is assumed that the victim receiver knows the complete control information for its own PDSCH signal via RRC and PDCCH from its service eNS, the components listed above associated with the interference signal are generally unknown to the victim receiver. Without additional signaling, the receiver can further estimate the above components for cochannel interference on a RB basis. Nevertheless, such uncertainty degrades the performance of the CI. An efficient way to signal information regarding these interference components would reduce the receiver's complexity to estimate / detect interference information and help the receiver to provide better performance resulting from CI gain.
    [33] [33] Figure 4 is a flow chart of an interference cancellation method from the perspective of the UE according to an innovative aspect. In step 401, a user equipment (UE) receives a desired radio signal and an interference radio signal in a service cell of a mobile communication network. The interference signal can be either intracellular or intercellular interference. In step 402, the UE obtains a first set of parameters related to the interference signal. For example, the UE can blindly detect some of the parameters related to the interference signal by the UE receiver without any signaling. In step 403, the UE obtains a second set of parameters related to the interference signal. The purpose is for the UE receiver to obtain additional parameters related to the interference signal to improve the quality of interference cancellation (IC).
    [34] [34] For example, parameters may comprise predefined rules for generating the reference signal associated with the interference signal. The rules can indicate exactly how to generate the reference signal associated with the interference signal, or indicate multiple candidates on how to generate the reference signal associated with the interference signal. The UE is then able to estimate the interference channel that uses the reference signal.
    [35] [35] Figure 5 is a flow chart of an interference cancellation method from the perspective of eNB according to an innovative aspect. In step 501, a service base station (eNB) transmits radio signals to user equipment (UE) on a mobile communication network. In step 502, eNB determines a first set of parameters related to an intracellular interference signal for the UE. For example, the intracellular interference signal is due to the MUNIM transmission of the service eNB to other users served in the same cell. In step 503, eNB determines a second set of parameters related to an intercellular interference signal for the UE. For example, the intercellular interference signal is due to transmission from adjacent cells. In step 504, the eNB transmits the first and second sets of parameters to the UE for the UE to cancel a contribution from the interference signals based on the first set and the second set of parameters.
    [36] [36] The cochannel interference MOD can either be signaled to the victim UE by implicit means or be explicitly signaled. An example of an implicit mode is to let the programmer follow a rule that limits the MOD of cochannel users to be with a small constellation size, for example, QPSK. This is based on the assumption that a low dimensional constellation is more likely to be correctly detected compared to a high-order constellation. Based on the same consideration above, another technique with reduced overhead is to signal the victim UE if a cochannel interference signal is modulated or not by a small dimension constellation.
    [037] [037] Pre-coding information associated with the target CI interference signal can be signaled to the victim UE. In CRS-based TMs, it is useful for the UE to have pre-encoder information that cannot be estimated from CRS. To reduce overhead, instead of explicitly signaling the pre-encoder used by interference, it is only possible to signal a subset of pre-encoder candidates from the coding table and then rely on the UE's ability to further detect that pre-encoder encoder is actually used by the interference. Another alternative is to pre-define a subset of pre-encoders, restrict the pre-encoder used by an interference source to be within this subset, and then signal which pre-encoder is used by the interference source. The predefined subset can also be a function of the precoder used by the victim receiver. This is feasible for the case of MU-MIMO transmission, since the other interference channel MIMO user generally does not apply the same pre-coding weight as that used by the victim receiver, and programming tends to pair MOCO channel users with orthogonal precoders.
    [038] [038] A victim receiver can estimate the interference channel with the help of known pilot signals from cocanal interference. For example, if the signaled information is for the generation of a DMRS interference pattern, such reference signal information is beneficial for (1) detecting the existence of interference in each RB; and (2) estimation for the interference channel. In this case based on DMRS, as already mentioned, the interference pre-coding information is not necessary because DMRS is pre-coded by the same pre-encoder applied in the interference PDSCH. If the signaled information is for the generation of the CRS interference pattern, it is useful to estimate the interference channel, but not for the interference pre-coding information. In this case, obtaining the pre-coding information may depend on later signaling or the receiver's ability to detect it.
    [039] [039] The network may not need to signal all the parameters necessary to generate a reference signal associated with the interference, and the UE may make some blind detection if some of the parameters are unknown.
    [40] [40] For CWIC, all the issues found for SLIC, for example, the lack of RB and MOD allocation of the interference signal, undoubtedly do not exist. More challengingly, the receiver needs to know the mapping rules of how the transport block is formed in order to reconstruct the interference contribution.
    [41] [41] Unpacking is a critical issue that a receiver would encounter when running CWIC. As shown in Figure 3, before the modulation mapping of step 305, the transmitter scrambles the bits of information encoded for PDSCH with random bits generated by a scrambler.
    [42] [42] A receiver must unscramble the demodulated signal before decoding and verifying the CRC. Although the RNTI associated with the interference signal is not revealed to a victim UE, the control information for decoding / recoding the TB associated with the interference signal cannot be obtained by decoding the PDCCH associated with the interference signal and must be signaled to the EU victim by some means. In addition, in current specifications there is no way to unscramble another cocanal signal because the scrambling rule is associated with the RNTI of each EU. Due to the heavy overload of RNTI, signaling the interference RNTI is impossible. Safety is another concern, since the DCI of the interference DE would become soluble by others with known RNTI.
    [43] [43] In accordance with an innovative aspect of CWIC support, the scrambling rule for PDSCH becomes either (1) cell specific; or (2) substitutes nRNTI for N, which can be a configured value, or multiple configured values, and then can be chosen for additional signaling. The key is that shuffling should not be a function of EU RNTI. As a result, protection for PDCCH is still preserved, since RNTI is unknown to other recipients. The victim receiver then explicitly or implicitly receives the scrambling rule for the cochannel signals to be decoded / recoded. Based on knowledge of the scrambling rules for both the desired signal and the interference signal, the victim receiver can perform CWIC properly.
    [44] [44] Figure 6 illustrates the signaling of scrambling rules to support CWIC in a 600 subframe of a radio frame. As illustrated in Figure 6, each subframe includes resource elements allocated to the control channel (legacy PDCCH and ePDCCH) and data channel (legacy PDSCH). For the control channel, the base station applies scrambling with each EU RNTI for protection. For the data channel, the base station applies scrambling with 1) specific cell value (for example, Cell ID), or 2) configurable value (s) by the base station. For the purpose of interference cancellation, the base station can signal the interference signal scrambling rule to the victim UE, and the victim UE can decode / recode accordingly.
    [45] [45] Among all possible candidates that could help a receiver to have more information regarding interference, it is quite challenging to inform the allocation of interference signal resource blocks (RB assignment) to a victim receiver due to the large signaling overhead . Such information is useful for a receiver to know about interference. It is also useful for estimating MOD because MOD is the same for all programmed RBs in a transmission. Otherwise, the interference MOD is estimated for each subframe and each RB, or needs to be signaled additionally. Furthermore, with the knowledge of the RB allocation of the interference user, the aggregation function of physical resource blocks, which implies that the same pre-encoder is used for a predefined number of consecutive physical resource blocks, becomes applicable to better estimate the interference link channel for DMRS-based transmission modes.
    [46] [46] There are two techniques for representing RB assignment for PDSCH transmission. Technique 1 is a bitmap-based technique where each bit indicates whether each RB or each group of RBs is assigned or not. Technique 2 is to signal the starting RB index (or the starting RB group index) and the number of contiguous RBs (or groups of RBs) assigned. Technique 2 significantly reduces signaling overhead when compared to Technique 1 specifically for a broadband system, at the cost of limiting some of the feasibility of programming to maintain contiguous RB allocation. However, even according to Technique 2, the additional signaling for assigning RB of cocanal interference is still a heavy load for the control channel.
    [47] [47] According to an innovative aspect, the representation of the RB assignment for interference is proposed. In general, it may not be necessary to signal the full RB assignment of the target interference to be canceled. For SLIC, a receiver does not even care about interference signals in the RBs not assigned to it. In addition, as discussed earlier, a receiver has some ability to detect cochannel interference, especially in DMRS-based transmission modes.
    [48] [48] Several methods are proposed to further reduce the amount of signaling overhead from assigning RBs to interference. The general concepts of the proposed methods are: 1) signaling the RBs that are interfered instead of signaling all the RBs assigned to interference TB; 2) leverage the UE's ability to reduce overload; and 3) signal according to programming restrictions. Each method comprises 1) The set of RBs to be signaled, represented by S; 2) The F format to represent S; for example, it could be represented by both Technique 1 and Technique 2. For ease of demonstration below, SV represents the set of RBs allocated to the victim UE and SIk represents the set of RBs allocated to the interference source k.
    [49] [49] Method 1: Signals the interference signal programming information when it can be represented in a compact mode. The programmer can follow a specific rule that aligns resource allocation for all cochannel users. For example, eNB simply signals the victim UE whether Sn S1 = St, whether it remains or not. This technique would not induce too much overhead for signaling, but it limits programming flexibility. Method 2: Signals the full RBs allocation of interference: S = Si. Method 3: Signals the location of "interfered" RBs: S = (Si, n Sr). Method 4: signals the superset that contains all interfered RBs and the superset is contiguous: S (S „n SI). This is a technique between completely signaling the allocation of interference RBs and blindly detecting the existence of an interference signal. Once the SU set is known in the victim UE, the UE can identify (SU n SIk) by detecting the existence of only k interference in the RBs belonging to (S n Ss,). Method 5: signals the allocation of RBs to some or all MOD candidates without specifying the interference contributor in each RB. For example, the receiver is signaled with the RBs allocation maps corresponding to QPSK, 16QAM and 64QAM. Due to the different level of symbol detection reliability, signaling only maps corresponding to low-order modulation schemes can help to reduce signaling overhead without significant loss of performance.
    [51] [51] For the methods illustrated above, the format representing the set S can be based on Technique 1 or Technique 2. It is also possible to choose a coarse granularity of RBs for resource allocation to reduce signaling overhead. A possible choice for the coarse granularity of RBs is the subband granularity, which is defined for the purpose of CSI feedback. In addition, joint signaling can be applied to allocate RBs and other parameters. For example, eNB can signal the allocation of RBs to some or all MOD candidates without specifying the interference contributor (for example, source) in each RB.
    [52] [52] Referring again to Figure 7, S „_ {0, 1, 6, 7, 10, 11, 12, 13, 14} represents the set of RBs allocated to the victim UE, SI, = {O, 1, 2, 3, 9, 5, 6, 7, 8} represents the set of RBs allocated to the interference source 1, and S12 = {10, 11, 12, 13, 14} represents the set of RBs allocated to the interference source 2. The PRBs allocated to both interference sources 1 and 2 are occupied in the same QPSK modulation order. As a result, the service eNB signals all PRBs interfered with QPSK, that is, S = {0, 1, 6, 7, 10, 11, 12,
    [53] [53] Figure 8 is a flow chart of a CWIC method with network assistance from the perspective of the UE according to an innovative aspect. In step 801, a user equipment receives a desired radio signal and an interference radio signal in a service cell of a mobile communication network. In step 802, the UE obtains a set of parameters related to the interference signal, and the set of parameters comprises a scrambling rule of the interference signal. The scrambling rule is based on a sequence that is either cell specific or configured by the network. In step 803, the UE cancels an interference signal contribution from the desired signal by canceling interference at the keyword level based on the parameter set. In one mode, the set of parameters also includes information on the allocation of resources from the interference signal.
    [54] [54] Figure 9 is a flow chart of a CWIC method with network assistance from an eNB perspective according to an innovative aspect. In step 901 a service base station transmits radio signals to user equipment (UE) on a mobile communication network. In step 902, the service base station determines a set of parameters related to an interference signal for the UE, the parameter set comprising an interference signal scrambling rule. The scrambling rule is based on a sequence that is either cell specific or based on the value (s) configured by the service base station. In step 903, the service base station transmits the parameter set to the UE so that the UE is able to cancel the contribution of the interference signal by means of keyword level interference cancellation based on the parameter set.
    [055] [055] Although the present invention has been described in connection with some specific modalities for instructional purposes, the present invention is not limited by those. Consequently, various modifications, adaptations and combinations of different resources of the described modalities can be performed without departing from the scope of the invention as presented in the claims.
    权利要求:
    Claims (14)
    [1]
    1. Method, characterized by the fact that it comprises: receiving a desired signal and an interference signal by a user equipment (UE) in a service cell of a mobile communication network; obtain a set of parameters related to the interference signal, where the set of parameters comprises a scrambling rule to unscramble the interference signal; and canceling a contribution from the desired signal interference signals by keyword level interference cancellation (CWIC) based on the set of parameters.
    [2]
    2_ Method, according to claim 1, characterized by the fact that the UE receives control information through a physical downlink control channel (PDCCH), and by the fact that the UE receives data information through a downlink shared physical channel (PDSCH).
    [3]
    3. Method, according to claim 2, characterized by the fact that the UE unspins the PDCCH using a specific UE identity, and by the fact that the UE unspins the PDSCH using the scrambling rule.
    [4]
    4. Method, according to claim 3, characterized by the fact that the scrambling rule is a specific cell identity or configured by the network.
    [5]
    5. Method, according to claim 1, characterized by the fact that the set of parameters also includes information on the allocation of resources of the interference signal.
    [6]
    6. Method, according to claim 5, characterized by the fact that the resource allocation information comprises blocks of overlapping physical resources (PRBs) allocated to both the interference signal and the desired signal.
    [7]
    7. User equipment (UE), characterized by the fact that it comprises: a receiver that receives a desired signal and an interference signal by a user equipment (UE) in a service cell of a mobile communication network; a control and configuration module that obtains a set of parameters related to the interference signal, where the set of parameters comprises a scrambling rule to unscramble the interference signal; and an interference cancellation (IC) module that cancels a contribution of the desired signals interference signals by means of keyword level interference cancellation (CWIC) based on the set of parameters.
    [8]
    8. UE, according to claim 7, characterized by the fact that the UE receives control information through a physical downlink control channel (PDCCH), and by the fact that the UE receives data information through a downlink shared physical channel (PDSCH).
    [9]
    9. UE, according to claim 8, characterized by the fact that the UE unspins the PDCCH using a specific EU identity, and by the fact that the UE unspins the PDSCH using the scrambling rule.
    [10]
    10. UE, according to claim 9, characterized by the fact that the scrambling rule is a specific cell identity or configured by the network.
    [11]
    11. UP, according to r_eivinrii: açrc 7, characterized by the fact that the set of parameters also includes information on the allocation of resources of the interference signal.
    [12]
    12. UE, according to claim 11, characterized by the fact that the resource allocation information comprises overlapping physical resource blocks (PRBs) allocated to both the interference signal and the desired signal.
    [13]
    13. Method, characterized by the fact that it comprises: transmitting radio signals through a base service station (eNB) to user equipment (UE) on a mobile communication network; determine a set of parameters related to an interference signal for the UP, where the set of parameters comprises an interference signal scrambling rule; and transmitting the set of parameters to the UE to the UE to cancel a contribution from the interference signal by means of keyword level interference cancellation (CWIC) based on the set of parameters.
    [14]
    14. Method, according to claim 13, characterized by the fact that the base station transmits
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    公开号 | 公开日
    US20150147994A1|2015-05-28|
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    法律状态:
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2019-06-11| B25A| Requested transfer of rights approved|Owner name: HFI INNOVATION INC. (CN) |
    2020-08-18| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04W 72/04 Ipc: H04B 7/0452 (2017.01), H04B 7/06 (2006.01), H04L 5 |
    2020-08-18| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2020-08-25| B25L| Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled|Owner name: MEDIATEK INC. (TW) Free format text: ANULADA A PUBLICACAO CODIGO 25.1 NA RPI NO 2527 DE 11/06/2019 POR TER SIDO INDEVIDA. |
    2020-09-08| B15I| Others concerning applications: loss of priority|Free format text: PERDA DA PRIORIDADE US 61/909,494 DE 27/11/2013 POR NAO CUMPRIMENTO DE EXIGENCIA REFERENTE A COMPROVACAO DE DIREITO DE PRIORIDADE |
    2020-12-08| B11B| Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements|
    2021-08-24| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-11-23| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    优先权:
    申请号 | 申请日 | 专利标题
    US201361909494P| true| 2013-11-27|2013-11-27|
    US14/555,271|2014-11-26|
    US14/555,271|US9813124B2|2013-11-27|2014-11-26|Methods for codeword level interference cancellation with network assistance|
    PCT/CN2014/092371|WO2015078385A1|2013-11-27|2014-11-27|Methods for codeword level interference cancellation with network assistance|
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