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    • 专利摘要:
    METHOD TO DETECT DOWNLINK CONTROL INFORMATION, DEVICE TO DETECT DOWNLINK CONTROL INFORMATION WHICH IS APPLIED ON A RELAY NODE AND EVOLVED NODE B (ENB). The present invention describes a method and a device for detecting downlink control information. The method includes: a Relay Node (RN) that receives control information loaded on a Relay Physical Downlink Control Channel (R-PDCCH) sent by an evolved Node B (eNB) to acquire a control resource; wherein the RN performs detection on the control resource according to an index of the control resource to acquire the control information itself; where the control resource is a Relay Control Channel Element (R-CCE) or a Physical Resource Block (PRB). The present invention can decrease system burden and increase system transmission efficiency.
    公开号:BR112012001321B1
    申请号:R112012001321-1
    申请日:2010-08-25
    公开日:2021-05-18
    发明作者:Ming Yuan；Feng Bi；Jin Yang；Shuanshuan Wu；Feng Liang
    申请人:Zte Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention relates to the field of mobile communication and particularly to a method and a device to detect the downlink control information. FUNDAMENTALS OF THE RELATED TECHNIQUE
    [002] The future wireless communication or cellular system is required to increase the coverage range and to support a higher speed transmission, which presents new challenges to the wireless communication technique. However, the issue of system construction and maintenance expenses stands out even more. With increasing transmission rate and communication distance, the issue of battery power consumption has also become evident, and future wireless communication will use higher frequencies, which result in more severe attenuation of path loss. In order to increase the high data rate, the group mobility and the coverage range of the temporary network distribution, to increase the cutting edge cellular effluent, and to provide services to users within the coverage holes of the cellular system, the system Wireless communication introduces the relay technique and therefore the relay technique is considered as a crucial technique of 4G.
    [003] In the Long Duration Evolution (LTE) communication system, a Physical Downlink Control Channel (PDCCH) is designed to be composed of a plurality of different components, and each component has its own specific functions. A plurality of terms and conventions are defined below for the sake of convenience of description:
    [004] 1. Resource Element (RE): the minimum time and frequency resource block, which occupies 1 secondary carrier in 1 Orthogonal Frequency Division Multiplexing (OFDM) symbol.
    [005] 2. Resource Element Group (REG): 1 REG can be composed of 4 or 6 REs according to different positions of the reference symbol in each OFDM symbol.
    [006] 3. Control Channel Element (CCE): The CCE is composed of 36 REs, 9 REGs, and the CCE comprises information such as: user downlink scheduling grant information (DL grant) and information uplink scheduling grant (UL grant), as well as information related to system information (SI), random access response (RA) and people search.
    [007] 4. Physical Resource Block (PRB): 1 continuous slot in the time domain, and 12 consecutive secondary carriers in the frequency domain.
    [008] 5. PRB pair: 1 continuous secondary frame in the time domain, and 12 consecutive secondary carriers in the frequency domain.
    [009] 6. L aggregation level: a combination format of CCEs, that is, the PDCCH can only be composed of L CCEs, where LG{1,2,4,8}. That is, the PDCCH is only composed of the combination of 1 CCE (denoted 1-CCE), the combination of 2 CCEs (denoted 2-CCEs), the combination of 4 CCEs (denoted 4-CCEs) or the combination of 8 CCEs ( denoted 8-CCEs), and these four different combinations further correspond to four different encoding rates, that is, the encoding rate of 1-CCE is 2/3, the encoding rate of 2-CCE is 1/3, the 4-CCE encoding rate is 1/6 and 8-CCE encoding rate is 1/12.
    [010] 7. Search Space (SS): the search space is composed of a plurality of candidate control channel groups, and the UE monitors the search space and blindly detects the downlink control channel related to this space search in search space.
    [011] 8. Two types of search spaces: one is the UE Common Search Space that all UEs must monitor, and carries the common information related to SI response, RA response and people search; the other is the UE-specific Search Space, which carries the respective UE uplink and downlink scheduling grant information.
    [012] 9. Different CCE aggregation levels have the corresponding number of candidate control channels, namely the maximum blind detection times. For example, in UE-Specific Search Space: the number of candidate control channels of 1-CCE is 6, that is, blind detection times according to 1-CCE as a group is no more than 6; the number of candidate control channels of 2-CCE is 6, that is, the blind detection times according to 2 CCEs as a group is no more than 6; the number of candidate control channels of 4-CCE is 2, that is, the blind detection times according to 4 CCEs as a group is no more than 2; and the number of candidate control channels of 8-CCE is 2, that is, the blind detection times according to 8 CCEs as a group is no more than 2. In Common UE Search Space: the number of 4-CCE candidate control channels is 4, that is, blind detection times according to 4 CCEs as a group is no more than 4; and the number of candidate control channels of 8-CCE is 2, that is, the blind detection times according to 8 CCEs as a group is no more than 2.
    [013] The detailed process of the UE performing blind detection on the PDCCH in the LTE system is:
    [014] on the eNB side (where eNB is also called E-UTRAN NodeB, where E-UTRAN is the Evolved Universal Terrestrial Radio Access Network);
    [015] Step 1: Channel coding is performed on the control information loaded in the PDCCH of each UE respectively;
    [016] Step 2: The encoded control information loaded in the PDCCHs of all UEs is cascaded, and is mixed with a cell specific sequence;
    [017] Step 3: Quadrature Phase Shift Key (QPSK) modulation is performed to acquire a string of CCEs that match the control information loaded on all PDCCHs at this time, and the CCEs are numbered starting from 0 ; it is assumed that the PDCCH at this time is composed of 32 CCEs in total, that is, it is numbered as CCE 0, CCE 1 , CCE 31.
    [018] Step 4: The string above CCEs is interleaved by taking the REG as the unit and then mapping to the RE;
    [019] Step 5: the CCEs are transmitted after the execution of the Fast Inverse Fourier Transform (IFFT).
    [020] On the EU side,
    [021] Step 1: the receiving end acquires a string of CCEs with the same numbers as those on the eNB side after performing the Fast Fourier Transform (FFT) and deinterlacing;
    [022] Step 2: The UE starts blind detection from the 1-CCE combination, first calculates the start position of the 1-CCE based on parameters such as the UE identity (ID), the secondary frame number and so on, that is, blind detection starts from the CCE with each number, and then determines the search space according to the number of candidate control channels. For example, the start position of 1-CCE is CCE 5, and then the UE search space is {CCE 5, CCE 6, CCE 7, CCE 8, CCE 9, CCE 10}. In other words, the UE must perform blind detection in [CCE 5, CCE 6, CCE 7, CCE 8, CCE 9, CCE 10], respectively.
    [023] Step 3: If the UE does not detect a matching UE ID when performing blind detection according to the 1-CCE combination, it starts to perform blind detection from the 2-CCE combination. First, the start position of 2-CCE is still calculated according to parameters such as its UE ID, the subframe number, and so on, so the search space is determined according to the number of control channels candidates. For example, the starting position of 2-CCE is CCE 10, and then the UE search space is {[CCE 10 CCE 11], [CCE 12 CCE 13], , [CCE 20 CCE 21]}. In other words, the UE shall perform blind detection on [CCE 10 CCE 11], [CCE 12 CCE 13], , [CCE 20 CCE 21] respectively, and so on.
    [024] Step 4: If the UE does not monitor the ID of the matching UE in the whole blind detection process, it means that there is no control signaling to be sent to this UE, and the UE switches to standby mode; if the UE monitors the corresponding UE ID, it demodulates the corresponding service information according to the instructions in the control signaling.
    [025] In the mobile communication system with relay nodes, as shown in Figure 1, the link between the eNB and the RN is called the long-haul Forwarding Link, the link between the RN and a user within its coverage range is called the Access Link, and the link between the eNB and the UE under its coverage is called the Direct Link. For the eNB, the RN is equivalent to the UE; and for the UE, the RN is equivalent to an eNB.
    [026] The inband relay means that the long-haul forwarding link and the access link use the same frequency range and, therefore, when applying the inband relay, the RN cannot perform sending and receiving operations simultaneously on the same frequency feature in order to avoid your own sending and receiving interference. When the RN sends the downlink control information to the UE that belongs to this RN, it cannot receive the downlink control information sent from the eNB. Therefore, the RN first sends the downlink control information to the UE belonging to this RN in one or two of the preceding symbols during downlink transmission, then switches from transmission to reception in a certain period and, after the switching is finished, receives data from the eNB in subsequent OFDM symbols, where the data includes Relay Physical Downlink Control Channel (R-PDCCH) and Relay Physical Downlink Shared Channel (R-PDSCH), as shown in Figure 2, a namely, the downlink control channel sent by the eNB to the RN is loaded into the Physical Resource Block (PRB).
    [027] The eNB sends the downlink control information through the R-PDCCH (the Relay PDCCH), and the control information loaded into the R-PDCCH includes information such as the RN's uplink/downlink schedule grant and so on. on. In the downlink long-way forwarding secondary frame, the eNB semi-statically reserves a plurality of PRBs for R-PDCCH transmission, as shown in Figure 3. In the downlink long-way forwarding secondary frame, the eNB semi-reserves - statically a plurality of PRB pairs for R-PDCCH transmission, wherein the PDCCH of the Rel-8 UE is transmitted in the preceding n symbols (n < 3) in the first slot, the downlink scheduling grant information ( DL grant) of the RN are transmitted in the remaining symbols in the first slot unless the symbol occupied by the PDCCH, and the uplink scheduling grant information (UL grant) of the RN is transmitted in the second slot.
    [028] At the moment, the R-PDCCH search in the Relay search is always an access point. Because of the R-PDCCH detection problem, the Third Generation Partnership Project (3GPP) has only the SS common to the RN similar to the SS common to the EU. However, there is no solution for detecting R-PDCCH. BRIEF DESCRIPTION OF THE INVENTION
    [029] The technical problem to be solved in the present invention is the provision of a method and a device to detect the downlink control information to solve the problem of how relay nodes search for their own downlink control information in the system of LTE-A with the relay nodes.
    [030] In order to solve the above technical problem, the present invention provides a method to detect the downlink control information, wherein the method comprises:
    [031] a Relay Node (RN) that receives downlink control information loaded on a physical relay downlink control channel (R-PDCCH) sent by an evolved node B (eNB) to acquire a control resource;
    [032] in which the control resource is loaded into a group of physical resource blocks (PBR) or PBR pairs semi-statically reserved by the eNB for the relay, and said control resource is based on an element of the channel. relay control (R-CCE) or in an aggregation of one or more PRBs.
    [033] The control resource consists of the downlink control information loaded into the R-PDCCH; wherein the method further comprises: performing detection on the control resource by the RN according to an index of the control resource to acquire its own downlink control information.
    [034] The above method may additionally have the following characteristics:
    [035] when the control resource is based on the R-CCE, the R-PDCCH of the uncle RN is interleaved, and the step of reception by the RN of the downlink control information loaded on the R-PDCCH sent by the eNB to acquire the resource control comprises:
    [036] said reception by the RN of the downlink control information loaded in the R-PDCCH sent by the eNB in a group of PRBs or PRB pairs semi-statically reserved by the eNB for the relay, and the execution of the Fast Fourier Transform (FFT) and de-interlacing to acquire a plurality of R-CCEs.
    [037] The above method may additionally have the following characteristics:
    [038] when the control resource is transmitted in the aggregation of one or more PRBs, the R-PDCCHs of several RNs are not interleaved with each other, and the step of reception by the RN of the downlink control information loaded in the R-PDCCH sent by eNB to acquire the control feature comprises:
    [039] the reception by the RN of the downlink control information loaded on the R-PDCCH sent by the eNB in one or more PRB pairs of a group of PRB pairs semi-statically reserved by the eNB for the relay.
    [040] The above method may additionally have the following characteristics:
    [041] when the control resource is based on the R-CCE, the step of execution by the RN of the detection in the control resource according to the R-CCE index to acquire the control information itself comprises:
    [042] said acquisition by the RN of an RN-specific search space according to an identity of the RN, a secondary frame number of a long-route secondary frame, an aggregation level of a CCE and a number of candidate control channels, in which the RN-specific search space is denoted by an index of R-CCE; and
    [043] in which the RN performs blind detection on the R-CCEs in the RN-specific search space, and if an R-CCE that corresponds to an RN's own identity is detected, the downlink control information loaded in this R- CCE will be the RN's own control information.
    [044] The above method may additionally have the following characteristics:
    [045] said RN-specific search space is:

    [046] where L e{1,2,4,8}, L e {1,2,4}, L e {1,2} or L e {1}, ei = 0 ,•••, L -1, e = 0,..., E(L) -1, and E(L) is the number of candidate control channels, and NR-CCE,k is a total number of R-CCEs for the transmission of the relay link, Yk =( A*Yk-i) mod D, Yi=n RNTI^O, A =39827, D =65537, k is the secondary frame number of long-route forwarding secondary frame, and nRNT1 is one RN identity index; the number of candidate control channels is 6, 4, or 2;
    [047] since the DL grant is mapped to a first socket and the UL grant is mapped to a second socket, then the RN respectively performs detection on the DL grant and the UL grant, namely, the RN detect DL grant in the first socket and detect UL grant in a second socket; that is, the RN has two specific search spaces, namely, a DL grant specific search space and a UL grant specific search space, at this moment;
    [048] the way to calculate the DL grant specific search space and the RN UL grant specific search space is as above, where the values of L are the same or different.
    [049] The above method may additionally have the following characteristics:
    [050] when the control resource is transmitted in the aggregation of one or more PRBs, the step of execution by the RN of the detection in the control resource according to the control resource indices to acquire the control information itself comprises:
    [051] said acquisition by the RN of a specific RN search space according to an identity of the RN, a secondary frame number of a long-route secondary frame, an aggregation level of PRBs and a number of PRBs candidates, in which the RN-specific search space is denoted by a PRB index; and
    [052] where the RN performs blind detection on PRBs in the RN-specific search space, and if a PRB that matches the RN's own identity is detected, the downlink control information loaded in this PRB will be the control information itself of the NB.
    [053] The above method may additionally have the following characteristics:
    [054] said RN-specific search space is:

    [055] where ne{1,2,4,8}, ne {1,2,4}, ne {1,2} or ne {1}, ei = 0 , •••, n-1, m = 0,..., M(n)-1, and M(n) is the number of candidate PRBs, and NBL is a total number of PRBs reserved semi-statically by the eNB for the relay, Yk=(A*Yk -1) mod D, Y-1=nRNTX^O, A =39827, D =65537, and k is the secondary frame number of the long route forwarding secondary frame; and the number of candidate PRBs is 6, 4 or 2;
    [056] the RN detects the downlink schedule grant information (DL grant) in a first slot and detects the uplink schedule grant information (UL grant) in a second slot;
    [057] a DL grant specific search space and an RN UL grant specific search space are calculated as a formula above, where the values of L are the same or different when calculating the grant specific search space of DL and the RN's UL grant-specific search space.
    [058] When n is 2, 4 or 8, the insertion of a fixed integer times interval between 2 or 4 or 8 consecutive PRB indices acquired according to the formula above to acquire non-consecutive PRBs.
    [059] The above method may additionally have the following characteristics:
    [060] the step of execution by the RN of the detection in the control resource according to the control resource index comprises:
    [061] the notification by the eNB of the RN's R-PDCCH control resource index through transmission signaling, upper layer signaling or message 2 in a random access process, and the further execution of detection in the control that matches the index of the control resource; and
    [062] notification by the eNB of the respective indices of a DL grant and an UL grant of the RN through broadcast signaling, upper layer signaling or message 2 in the random access process, and further execution of detection in the control resource that corresponds to the respective indices of the DL grant and the UL grant.
    [063] The above method may additionally have the following characteristics:
    [064] the eNB notifies the RN's R-PDCCH control resource index via a bitmap; or the eNB notifies the RN's R-PDCCH control resource index via a tree structure.
    [065] The above method may additionally have the following characteristics:
    [066] the step of execution by the RN of the detection in the control resource according to the control resource index comprises: the appointment of various levels of aggregation between the RN and the control resource index through the eNB and the RN, and further performing detection on the control resource that matches the index of the control resource.
    [067] The above method may additionally have the following characteristics:
    [068] the eNB notifies a change in the aggregation level between the RN and the control resource index through a transmission channel of the RN.
    [069] When the control feature is based on R-CCE, RN's DL grants are interleaved with each other, and RN's UL grants are interleaved with each other;
    [070] the step of receiving by the RN the downlink control information loaded on the R-PDCCH sent by the eNB to acquire the control resource further comprises:
    [071] the reception by the RN of a DL grant interleaved in a first slot of a group of PRB pairs semi-statically reserved by the eNB for the relay, the execution of the Fast Fourier Transform (FFT) and the deinterlacing to acquire a plurality of R-CCEs DL grants;
    [072] the reception of an UL grant interleaved in a second slot of a group of PRB pairs semi-statically reserved by the eNB for the relay, the execution of the Fast Fourier Transform (FFT) and the de-interlacing to acquire a plurality of R-CCEs UL concessions; and wherein the RN performs detection in a DL grant search space and an UL grant search space, respectively.
    [073] When the control resource is transmitted in the aggregation of one or more PRBs, the R-PDCCHs of several RNs are not interleaved with each other, and the RN has a specific PRB,
    [074] the step of receiving by the RN the downlink control information loaded on the R-PDCCH sent by the eNB to acquire the control resource further comprises:
    [075] the RN receiving a DL grant in a first slot of one or more pairs of PRBs semi-statically reserved by the eNB for the relay, and receiving a UL grant in a second slot; and
    [076] where the RN performs detection in a DL grant search space and in an UL grant search space, respectively.
    [077] The DL grant search space and the UL grant search space correspond to the same level of aggregation or different levels of aggregation.
    [078] In order to solve the above technical problem, the present invention provides a device to detect the downlink control information, which is applied in a Relay Node, and the device comprises a receiving unit and a detection unit, on what:
    [079] the receiving unit is configured: to receive the control information loaded on a physical relay downlink control channel (R-PDCCH) sent by an evolved node B (eNB) in a group of physical resource blocks ( PRB) semi-statically reserved by the eNB for the relay to acquire a control resource;
    [080] the detection unit is configured: to perform detection on the control resource acquired by the receiving unit according to an index of the control resource to acquire the RN's downlink control information.
    [081] The receiving node is configured: to acquire the downlink control information loaded into the R-PDCCH as the control resource, where the control resource is based on an element of the relay control channel (R-CCE ) or in an aggregation of one or more PRBs.
    [082] The device above may additionally have the following features:
    [083] the receiving unit is configured: to receive the control information loaded on the R-PDCCH sent by the eNB in a group of PRBs or PRB pairs semi-statically reserved by the eNB for the relay, and perform the Fast transform of Fourier (FFT) and deinterlacing to acquire a plurality of R-CCEs;
    [084] to receive a DL grant interleaved in a second slot from a group of PRB pairs semi-statically reserved by the eNB for the relay, and to receive an UL grant interleaved in a second slot.
    [085] The device above may additionally have the following features:
    [086] the receiving unit is also configured: to receive the control information loaded on the R-PDCCH sent by the eNB in a group of PRBs or PRB pairs semi-statically reserved by the eNB for the relay; to receive a DL grant in a first slot of one or more PRB pairs semi-statically reserved by the eNB for the relay, and to receive an UL grant in a second slot.
    [087] The detection unit is configured: to acquire an RN-specific search space according to an RN identity, a secondary frame number of a long-route secondary frame, an aggregation level of a CCE and a number of candidate control channels, to perform blind detection on the R-CCEs in the RN-specific search space, and if an R-CCE that matches the RN's own identity is detected, the control information loaded into this R-CCE will be the RN's own control information; where the RN-specific search space is denoted by an index of R-CCE.
    [088] The device above may additionally have the following features:
    [089] the detection unit is configured: respectively, to perform detection on the DL grant and the UL grant since the DL grant is mapped into a first slot and the UL grant is mapped into a second slot, namely, to detect the DL grant in the first socket and detect the UL grant in a second socket; that is, at this moment, there are two specific search spaces, namely, a DL grant specific search space and a UL grant specific search space, which are respectively denoted by a respective R-CCE index.
    [090] The device above may additionally have the following features:
    [091] the detection unit is also configured: to acquire an RN-specific search space according to an RN's identity, a secondary frame number of a long-route secondary frame, an aggregation level of PRBs and a number of candidate PRBs, to perform blind detection on PRBs in the RN-specific search space, and if a PRB that matches the RN's own identity is detected, the downlink control information loaded into this PRB will be the control information itself of the RN;
    [092] where the RN-specific search space is denoted by a PRB index.
    [093] The detection unit is configured: respectively, to perform detection on the DL grant and the UL grant since the DL grant is mapped into a first slot and the UL grant is mapped into a second slot, namely, to detect the DL grant in the first socket and detect the UL grant in a second socket; that is, at this moment, there are two specific search spaces, namely, a DL grant specific search space and a UL grant specific search space, which are respectively denoted by a respective R-CCE index.
    [094] The device above may additionally have the following features:
    [095] the detection unit is also configured: to additionally perform detection in the control resource that corresponds to the control resource index according to the RN's R-PDCCH control resource index notified by the eNB through the signaling of transmitting, upper layer signaling or message 2 in a random access process; and to further perform a detection in the control resource that corresponds to the respective indices of a DL grant and an UL grant by the eNB in accordance with the respective indices of the DL grant and UL grant of the RN notified by the eNB through the broadcast signaling, upper layer signaling or message 2 in the random access process.
    [096] The device above may additionally have the following features:
    [097] the detection unit is also configured: to point out various levels of aggregation between the RN and the index of the control resources through the eNB and the RN, and to additionally perform detection on the control resources that correspond to the index of the resources of control.
    [098] In order to solve the above technical problem, the present invention provides an evolved Node B (eNB), which comprises a support module and a sending module, in which
    [099] The support module is configured to: support download control information from a relay node (RN) on a physical relay downlink control channel (R-PDCCH), and then send the R-PDCCH to the shipping module;
    [0100] the send is configured to send the R-PDCCH so that the RN acquires a control resource and then the RN performs detection on the control resource according to an index of the control resource to acquire the control information itself ;
    [0101] where the control resource is a Relay Control Channel Element (R-CCE) or a Physical Resource Block (PRB).
    [0102] Briefly, the present invention fully employs the good conditions of the long-distance forwarding link channel and greatly simplifies the complexity of the RN's execution of detection in the R-PDCCH. The present invention is very suitable for the RN, it decreases the system burden and increases the transmission efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS
    [0103] Figure 1 is the basic architecture of the system after the introduction of the Relay;
    [0104] Figure 2 is the frame structure of the downlink long way forwarding secondary frame;
    [0105] Figure 3 is a diagram of the position relationship between the R-PDCCH and the PDCCH;
    [0106] Figure 4 is a flowchart of the method to detect the downlink control information according to Example 1 of the present invention;
    [0107] Figure 5 is a flowchart of the method to detect the downlink control information according to Example 2 of the present invention. PREFERRED ACHIEVEMENTS OF THE PRESENT INVENTION
    [0108] In the present invention, the RN receives the control information loaded in the R-PDCCH sent by the eNB to acquire the control resources; the RN detects the control resources according to the control resource index to acquire its own control information;
    [0109] where the control resources are R-CCEs or PRBs.
    [0110] That is, the RN can perform detection on the downlink control channel based on the R-CCE index (the relay control channel element index), and can also perform detection based on the index of PRB (the Physical Resource Block index).
    [0111] The present invention will be illustrated in detail in combination with the figures and specific examples.
    [0112] Example 1 deals with performing detection on the downlink control channel based on the R-CCE index.
    [0113] As shown in Figure 4, this example of the present invention comprises the following steps:
    [0114] step 301, the RN receives the control information loaded in the R-PDCCH that are sent by the eNB in a group of PRBs that is semi-statically reserved by the eNB for the relay, and performs the FFT and de-interlacing to acquire a plurality of R-CCEs;
    [0115] step 302, the RN performs detection on the R-CCEs according to the R-CCE indices to acquire its own control information.
    [0116] In this method, the control information of different RNs themselves is interleaved, but different RNs have different search spaces.
    [0117] In this example, the R-CCE index can be acquired by an implicit notification form or by an explicit notification form:
    [0118] 1. The form of implicit notification: using the ID of the RN, the secondary frame number of the long-route secondary frame (-the relay secondary frame), the aggregation level L, and the number of channels candidate controls for calculating the RN-specific search spaces S(L) that correspond to different L, wherein the RN-specific search space is denoted by the R-CCE index; the blind detection by the RN of the R-CCEs in the RN's specific search spaces, and if it detects an R-CCE that corresponds to its own RN ID, the control information loaded in this R-CCE is the RN's own control information .
    [0119] Furthermore, since the channel condition between the eNB and the RN is much better than the channel condition between the eNB and the UE, then the above calculation method can be incremented to further reduce the times of blind detection. The parameters in the specific increment are tl as follows:
    [0120] the R-PDCCH is composed only of a combination of LR-CCEs, where L and {1, 2}, that is, the R-PDCCH is composed only of the combination of 1 R-CCE (denoted 1-R - CCE) or the combination of 2 R-CCEs (denoted 2-R-CCE) that correspond, respectively, to two higher encoding rates.
    [0121] The number of candidate control channels of 1-R-CCE and 2-R-CCE is not limited to 4 or 2, that is, when the RN performs blind detection according to 1-R-CCE and 2-R-CCE, blind detection times are no more than 4 or 2,
    [0122] in which the specific search spaces of RN S(L) are:

    [0123] where L e {1,2}, i = 0 ,•••, L —1, e = 0,..., E (L) —1, and E (L ) is the number of channels of candidate controls, and NR-CCE,k the total number of R-CCEs for the forwarding link transmission over the long haul allocated by the eNB, Yk = ( A*Yk-i) mod D, Y—1=n RNTX^O , A =39827, D=65537, k is the subframe number of the long route subframe, and nRNT1 is the RN ID index.
    [0124] 2. The form of explicit notification: setting the R—CCE index of the R—CCE that carries the R—PDCCH of each RN, and the notification by the eNB of the R—CCE index of the R—PDCCH of the RN , and the RN does not need to perform blind detection. This form is suitable for the condition where the number of RNs in the cell is relatively small,
    [0125] in which the specific form of notification of the R-CCE index may comprise:
    [0126] 1) Explicit notification of each RN of the respective R-CCE index when loading the R-CCE index in random access message 2 or from the upper layer signal. There are two specific ways to follow:
    [0127] (1) the bitmap form: if there are NR-CCE,k CCEs in the subframe k in total, it will be necessary for the NR-CCE,k bits to notify the R-CCE index;
    [0128] (2) the tree structure: since the R-CCEs that make up the R-PDCCH have the continuity characteristic and an R-PDCCH is composed only of 1 to 2 R-CCEs, then the tree structure can be used to further decrease charges. This form requires the eNB and the RN to point to various combinations of R-CCEs denoted by the bit used. If there are NR-CCE,k R-CCEs in subframe k in total, then [log2(2NR-CCE,k - 1)] bits are needed;
    [0129] 2) the semi-static change of the index of R-CCE fixed above: the presetting by the eNB and by the RN of a plurality of combinations between the index of RN and R-CCE; notification by the NB's eNB of the change in the aggregation level between the RN and R-CCE index through the RN's Physical Relay Transmission Channel (R-PBCH) to obtain the semi-static change of the R- CCE.
    [0130] Consequently, the device for detecting the downlink control information according to the example of the present invention is applied to the relay nodes, and the device comprises the receiving unit and detection unit, wherein:
    [0131] the receiving unit is used to receive the control information loaded in the R-PDCCH that are sent by the eNB in a group of PRBs that is semi-statically reserved by the eNB for the relay, to perform the FFT and the de-interlacing for acquire a plurality of R-CCEs;
    [0132] The detection unit is used to perform detection on the R-CCEs acquired by the receiving unit in accordance with the R-CCE indices to acquire the Relay Node control information.
    [0133] Therefore, an evolved Node B (eNB) comprises a support module and a sending module, in which
    [0134] The support module is configured to: support download control information from a relay node (RN) on a physical relay downlink control channel (R-PDCCH), and then send the R-PDCCH to the shipping module;
    [0135] the send is configured to send the R-PDCCH so that the RN acquires a control resource and then the RN performs detection on the control resource according to an index of the control resource to acquire the control information itself ;
    [0136] where the control resource is a Relay Control Channel Element (R-CCE) or a Physical Resource Block (PRB).
    [0137] Example 2 deals with performing detection on the downlink control channel based on the PRB index.
    [0138] As shown in Figure 5, this example of the present invention comprises the following steps:
    [0139] step 401, the RN receives the control information loaded in the R-PDCCH that are sent by the eNB in one or more PRBs of a group of PRBs that are semi-statically reserved by the eNB for the relay;
    [0140] step 402, the RN performs detection on the PRBs according to the PRB indices to acquire its own control information.
    [0141] In this method, the control channel information of different RNs themselves is independent and not interleaved, and the RN-specific search space is found in certain specific PRBs.
    [0142] In this example, the PRB index can be acquired by an implicit notification form or by an explicit notification form:
    [0143] 1. The form of implicit notification: the R-PDCCHs of different RNs that have a different PRB start index, using the RN ID, the secondary frame number of the long route forwarding secondary frame and the level n of aggregation of PRBs, as well as the number of candidate PRBs to calculate the RN-specific search spaces that correspond to the different n, where the RN-specific search space is denoted by the PRB index; in which the RN blindly detects the PRBs in the RN S(n) specific search spaces; if it detects a PRB that matches its own RN ID, the control information loaded into this PRB will be the RN's own control information,
    [0144] in which the specific way of calculating the RN-specific search space is as follows:
    [0145] the R-PDCCH is composed only of a combination of n PRBs, where ne {1, 2}, that is, the R-PDCCH is composed only of the combination of 1 PRB (denoted 1-PRB) or the combination of 2 PRBs (denoted 2-PRB) which correspond, respectively, to two higher encoding rates.
    [0146] The number of candidate PRBs of 1-PRB and 2-PRB is not limited to 4 or 2, that is, when the RN performs blind detection according to 1-PRB and 2-PRB, the times of blind detection are not more than 4 or 2.
    [0147] At this time, the specific search spaces of RN S(n) are:

    [0148] where ne {1,2}, i = 0 ,•••, n -1, m = 0,..., M (n) -1, and M (n) is the number of candidate PRBs , and NBL is the total number of a group of PRBs semi-statically reserved by the eNB for the relay, Yk=(A*Yk-1) mod D, Y-1=nRNTI^O, A =39827, D =65537, ké the secondary frame number of the long route forwarding secondary frame.
    [0149] 2. The form of explicit notification: fixing the PRB index of the PRB occupied by the R-PDCCH of each RN, and the notification by the eNB of the PRB index of the R-PDCCH of the RN.
    [0150] 1) Explicit notification of the respective PRB index occupied by each RN when loading the RPB index in which the R-PDCCH is found in the random access or upper layer signaling message 2. Similarly, the eNB can use the above bitmap and tree structure forms to notify the RN, whereby the RN need not perform blind detection.
    [0151] 2) Semi-static change of the PRB index fixed above: preset by the eNB and the RN of a plurality of combinations between the index of RN and R-CCE; notification by the RN's eNB about the change in the aggregation level between the RN index and R-CCE through the RN's physical relay transmission channel (R-PBCH) to obtain the semi-static change of the R- index CCE.
    [0152] Example 3 deals with the execution of detection on the DL grant and the UL grant, respectively, based on the R-CCE index.
    [0153] Step 1: the RN receives the DL grant sent by the eNB in the first slot of a group of PRB pairs semi-statically reserved by the eNB for the relay and receives the UL grant sent by the eNB in the second slot, performs the FFTs and de-interlacing , respectively, to acquire multiple R-CCEs that correspond to the DL grant, termed the R-CCE the DL grant, and multiple R-CCEs that correspond to the UL grant, termed the R-CCE the UL grant.
    [0154] Step 2: the RN performs the detection in the R-CCE DL concession according to the R-CCE DL concession index to acquire the RN's own DL concession; performs detection on R-CCE UL grant according to R-CCE UL grant index to acquire RN's own UL grant.
    [0155] In this method, DL grants from different RNs are merged and mapped to the first slot, and UL grants from different RNs are merged and mapped to the second slot. DL grants and UL grants can have the same level of aggregation or different levels of aggregation.
    [0156] Example 4 deals with performing detection on the DL grant and UL grant, respectively, based on the PRB index.
    [0157] Step 1: the RN receives the DL grant sent by the eNB in the first slot of one or more PRB pairs in a group of PRB pairs semi-statically reserved by the eNB for the relay, and receives the UL grant sent by the eNB in the second slot.
    [0158] Step 2: the RN performs detection on the DL grant and the UL grant, respectively, according to the PRB pair index in the first slot, called PRB DL grant, and the PRB pair index in the second slot, known as PRBconcession of UL, to acquire the DL concession itself and the RN concession of UL.
    [0159] In this method, DL grants from different RNs are not merged but are mapped to the first slot, and UL grants from different RNs are not merged but are mapped to the second slot. When DL grants and UL grants have the same level of aggregation, their search spaces are also the same; when DL grants and UL grants have different aggregation levels, their search spaces are also different. For example, when the n values of the aggregation levels of DL grants and UL grants are both ne{1, 2, 4}, their respective corresponding search spaces are completely the same. If the n values of the DL grants aggregation levels are ne{1, 2, 4}, while the n values of the UL grants aggregation levels are ne{1, 2}, the DL grants will have more a search space of n = 4 than in the case of the UL grant.
    [0160] Consequently, a device for detecting the downlink control information according to the examples of the present invention, which is applied in the relay nodes, comprises a receiving unit and a detection unit, wherein:
    [0161] the receiving unit is used to receive the control information loaded on the R-PDCCH that is sent by the eNB to acquire the control resources;
    [0162] the detection unit is used to perform detection on the control resources acquired by the receiving unit in accordance with the control resource indices to acquire the control information of this relay node;
    [0163] where the control resources are R-CCEs or PRBs.
    [0164] The receiving unit is additionally used to receive the control information loaded on the R-PDCCH sent by the eNB in a group of PRBs semi-statically reserved by the eNB for the relay, performs FFT and de-interlace to acquire a plurality of R-CCEs.
    [0165] The receiving unit is additionally used to receive the control information loaded on the R-PDCCH sent by the eNB into one or more PRBs in a group of PRBs semi-statically reserved by the eNB for the relay.
    [0166] The detection unit is additionally used to acquire the RN-specific search space according to the RN ID, the secondary frame number of the long-route secondary frame, the aggregation level of the R-CCEs and the number of candidate control channels, and perform blind detection on the R-CCEs in the RN-specific search space, and if it detects an R-CCE that matches its own RN ID, the control information loaded into this R-CCE will be the RN's own control information; where the RN-specific search space is denoted by the R-CCE index.
    [0167] The detection unit is also used to acquire the RN-specific search space according to the RN ID, the secondary frame number of the long-route secondary frame, the aggregation level of PRBs and the number of candidate PRBs, and performs blind detection on the PRBs in the RN-specific search space, and if it detects that a PRB matches its own RN ID, the control information loaded into this PRB will be the RN's own control information; where the RN-specific search space is denoted by the PRB index.
    [0168] The detection unit is additionally used to perform detection on the control resources that correspond to the control resource indices in accordance with the control resource indices of the RN's R-PDCCH notified by the eNB.
    [0169] The detection unit is additionally used to perform detection on the control resources that correspond to the control resource indices according to the level of aggregation between the RN and the control resource indices pointed out by the eNB and the RN.
    [0170] The following application examples are used to further describe the present invention.
    [0171] Application Example 1: Based on the R-CCE index, the specific detection steps when applying the implicit notification form are as follows:
    [0172] Assuming that: the secondary frame number of the long-route secondary frame is secondary frame #1, ie, k = 1; the total number of PRBs in the 20MHz system bandwidth is 100, where 10 PRBs are allocated for R-PDCCH transmission; the R-PDCCH is composed of 16 R-CCEs in total; the RN ID is B396 (hex), and the number of candidate control channels, ie, E LL), is 4, e = 0.1,2,3, and L e{1,2}.
    [0173] On the eNB side,
    [0174] the channel coding is performed on the control information loaded in the R-PDCCH of each RN, respectively, where each coding rate is used specifically and is determined according to the channel quality of the long-distance forwarding link , for example.
    [0175] 2) the encoded control information loaded into the PDCCHs of all RNs are cascaded, and mixed with a specific sequence of cells;
    [0176] 3) QPSK or 16QAM modulation is performed to acquire a strand of R-CCE that corresponds to all R-PDCCHs at this time, and the R-CCEs are numbered, ie, R-CCE 0 - R -CCE 15;
    [0177] 4) the string of R-CCEs above is interleaved by taking the REG as the unit and is then mapped to the corresponding RE for the 10 PRBs reserved semi-statically by the eNB by the delay;
    [0178] 5) R-CCEs are transmitted after executing the IFFT.
    [0179] On the RN side, the specific detection steps in the R-PDCCH are:
    [0180] step 1: the receiving end receives the RE that corresponds to the 10 PRBs semi-statically reserved by the eNB for the relay, and performs the FFTs and de-interlacing to acquire the same string of R-CCEs, that is, R- CCE 0 - R-CCE 15, with this at the transmitting end;
    [0181] step 2: the RN uses the RN ID, the secondary frame number of the long-route secondary frame, the aggregation level L as well as the number of candidate control channels to calculate the specific search spaces of RN S(L) that correspond to different L:
    [0182] the RN determines that the specific search space of RN S(1) that corresponds to L=1 is:

    [0183] the RN determines that the specific search space of RN S(2) that corresponds to L=2 is:

    [0184] step 3: the RN blindly detects R-CCE 9, R-CCE 10, R-CCE 11, and R-CCE 12 in the specific search space of RN S1(1) according to the case in which the combination is 1 R-CCE. If there is an RN ID that matches this RN, step 5 will be performed; if there is no RN ID that matches this RN, step 4 will be performed.
    [0185] Step 4: the RN blindly detects [R-CCE 2, R-CCE 3], [R-CCE 4, R-CCE 5], [R-CCE 6, R-CCE 7] and [R-CCE 8, R-CCE 9] in the RN specific search space S1(2) according to the case where the combination is 2 R-CCEs. If there is an RN ID that matches this RN, step 5 will be performed; if there is no RN ID that matches this RN, it indicates that there is no downlink control information related to this RN in this child frame.
    [0186] Step 5: The RN demodulates the corresponding service information according to the instructions into its own control information after it has acquired the control information loaded into the R-PDCCH.
    [0187] Application Example 2: Based on the R-CCE index, the specific detection steps when applying the explicit notification form are as follows:
    [0188] On the eNB side,
    [0189] the eNB adjusts the index of the R-CCE occupied by each RN that belongs to this eNB as a fixed value, such as, the index of the R-CCE occupied by RN1 is 2, the indexes of the R-CCEs occupied by RN2 are 8 and 9, and so on. Also, the R-CCE indices of all RNs are not superimposed.
    [0190] When the RN initially accesses the eNB, the eNB notifies the RN of the R-CCE index in random access message 2.
    [0191] For example, a given long-haul forwarding secondary frame has 16 R-CCEs in total, when applying the bitmap form, it needs 16 bits to notify the initial R-CCE index; when applying the incremented form of the tree structure, it only needs [log2 (2NR-CCE,k - 1)] = [log 2 (2xl6-1)] = 5 bits.
    [0192] On the RN side,
    [0193] When using the bitmap form, the RN determines its own R-CCE index according to the received 16-bit bitmap pattern. For example, the R-CCE index occupied by RN1 is 2, and the bitmap pattern received by the RN must be 00100000000000000; the R-CCE indexes occupied by the RN2 are 8 and 9, and the bitmap pattern received by the RN must be 0000000011000000.
    [0194] By using the incremented form of the tree structure, the RN can acquire those R-CCEs that are occupied by its R-PDCCH specifically according to the 5 bit information in message 2 and various levels of R-CCE aggregation denoted by the bits used that are pointed to by the RN and the eNB, such as, 10000 denoted that the R-CCE index of the R-CCE occupied by said RN1 is 0, and 11100 denoted that the R-CCE index of the R-CCEs occupied by said RN1 are 6 and 7, and so on.
    [0195] Application example 3: the R-PBCH is used to semi-statically notify your changes to the fixed index of R-CCE.
    [0196] The eNB and the RN predefine several levels of aggregation between the index of RN and R-CCE, as an aggregation level is: the R-CCE index of RN1 is 1, the R-CCE index of RN2 are 3 and 4, and the R-CCE index of RN3 is 5; another level of aggregation is: the R-CCE indices of RN1 are 2 and 3, the R-CCE indices of RN2 are 4, and the R-CCE indices of RN3 are 6 and 7; and so on.
    [0197] When it needs to change the aggregation level, the eNB uses the R-PBCH to notify the RN that it is changed for each aggregation level. The RN can also find its own R-CCE index according to the corresponding aggregation level.
    [0198] Application Example 4: Based on the PRB index, the specific detection steps when applying implicit notification are as follows:
    [0199] Assuming that: the secondary frame number of the long-route secondary frame is secondary frame #1, ie, k = 1; the total number of PRBs in the 20MHz system bandwidth is 100, where 10 PRBs are allocated for forwarding link transmission per lane.
    rada, i.e., =10; the ID of the RN is 3B50 (hex), the number m of the candidate PRBs is 4, that is, m=0.1,2,3, and n{1,2}.
    [0200] On the eNB side,
    [0201] 1) the channel coding is performed on the control information loaded in the R-PDCCH of each RN, respectively, where each coding rate specifically used is determined according to the channel quality of the long-distance forwarding link , for example
    [0202] 2) the encoded control information loaded in the PDCCHs of each RN are mixed with a specific sequence of cells, respectively;
    [0203] 3) QPSK or 16QAM modulation is then performed to acquire the separate control information loaded into the R-PDCCH of each RN;
    [0204] 4) the eNB uses the channel's frequency selective characteristics to map the control information loaded in the R-PDCCH of each RN to 1 or 2 respective PRBs with relatively good channel conditions;
    [0205] 5) Control information is transmitted after executing the IFFT.
    [0206] On the RN side, the specific detection steps in the R-PDCCH are:
    [0207] step 1: the receiving end uses the ID of the RN, the secondary frame number of the long route forwarding secondary frame, n, as well as the number of candidate PRBs to calculate the specific search spaces of RN S( n) that correspond to different n:
    [0208] the RN determines that the specific search space of RN S(1) that corresponds to n=1 is:

    [0209] (1) the RN determines that the specific search space of RN S(2) that corresponds to n=2 is:

    [0210] step 2: the RN first receives respectively PRB 3, PRB 4, PRB 5, and PRB 6 in RN's specific search space S1(1), and then performs the FFTs and blind detection, respectively, if there is a RN ID that matches this RN, step 5 will be performed; if there is no RN ID that matches this RN, step 4 will be performed.
    [0211] Step 4: the RN receives respectively {PRB 6, PRB 7} and {PRB 8, PRB 9} in the RN's specific search space S1(2), and then executes the FFTs and blind detection, respectively, if there is an RN ID that matches the RN, step 5 will be performed; if there is no RN ID that matches this RN, it indicates that there is no downlink control information related to this RN in the secondary frame.
    [0212] Step 5: The RN demodulates the corresponding service information according to the instructions in its own control information after having acquired the control information loaded in the R-PDCCH.
    [0213] Application Example 5: Based on the PRB index, the specific detection steps when applying explicit notification are as follows:
    [0214] On the eNB side,
    [0215] 1) the eNB adjusts the PRB index of each RNs that belong to this eNB as a fixed value, such as the PRB index of the PRB occupied by RN1 is 5, the PRB index of the PRBs occupied by RN2 are 7 and 8, and so on. Furthermore, the PRB indices occupied by all RNs are not overlapped.
    [0216] 2) when the RN initially reaches the eNB, the eNB notifies the RN of the PRB index in the random access or upper layer signaling message 2. For example, the total number of PRBs in 20 MHz system bandwidth is 100, where 10 PRBs are used for R-PDCCH transmission, when applying bitmap form, requires 10 bits to notify PRB index; when applying the incremented form of the tree structure, you only need to

    [0217] On the RN side,
    [0218] 1) When using the bitmap form, the RN determines its own PRB index according to the received 10-bit bitmap pattern. For example, the PRB index occupied by RN1 is 5, and the bitmap pattern received by RN must be 0000010000; the PRB indexes occupied by RN2 are 7 and 8, and the bitmap pattern received by the RN must be 0000000110;
    [0219] 2) by using the incremented form of the tree structure, the RN can acquire which PRBs are occupied by its R-PDCCH specifically according to the 5-bit information in message 2 or upper layer signaling, and by several PRB aggregation levels denoted by used bits that are pointed to by the RN and the eNB.
    [0220] Application example 6: the R-PBCH is used to semi-statically notify its changes to the fixed PRB index.
    [0221] The eNB and the RN predefine several levels of aggregation between the RN and the PRB index, such as an aggregation level is: the PRB index of RN1 is 1, the PRB index of RN2 are 8 and 9, and the PRB indices of the RN3 are 18 and 19; another level of aggregation is: the PRB indices of RN1 are 49 and 50, the PRB indices of RN2 are 69 and 70, and the PRB index of RN3 is 90; and so on.
    [0222] When it needs to change the aggregation level, the eNB uses the R-PBCH to notify the RN that it is changed in each aggregation level. The RN can also find its own initial PRB index according to the corresponding aggregation level.
    [0223] Briefly, the present invention is very suitable for relay nodes, ensures a lower complexity of the relay nodes that detect the downlink control information, and increases the overall system efficiency.
    [0224] Of course, the present invention may also have a variety of other examples, and those skilled in the art can make various modifications and transformations corresponding to the present invention without deviating from the character and essence of the present invention, and all such modifications or transformations are within the scope of protection of the appended claims of the present invention. INDUSTRIAL APPLICABILITY
    [0225] The present invention fully employs the good channel conditions of the long-haul forwarding link and greatly simplifies the complexity of the detection execution by the RN in the R-PDCCH. The present invention is very suitable for the RN, it decreases the system burden and increases the transmission efficiency of the system.
    权利要求:
    Claims (13)
    [0001]
    1. METHOD FOR DETECTING DOWNLINK CONTROL INFORMATION, the method characterized by comprising: a Relay Node, RN, which receives downlink control information loaded on a relay physical downlink control channel, R-PDCCH, sent by an evolved B-node, eNB, to acquire a control resource; and the RN performs detection on the control resource in accordance with an index of the control resource to acquire the control information itself; in which the control resource is a Relay Control Channel Element, R-CCE, R-PDCCHs of said RN are interleaved with each other, and the step of the RN that receives the downlink control information born in the R-PDCCH sent by the eNB to acquire the control resource comprises: said reception of information by the downlink control RN loaded on the R-PDCCH sent by the eNB in a group of PRBs or PRB pairs semi-statically reserved by the eNB for the relay, and performing the Fast Fourier Transform, FFT, and de-interlacing to acquire a plurality of R-CCEs; receive a DL grant interleaved in a first slot of the PRB pair group semi-statically reserved by the eNB for the relay and receive a UL grant interleaved in a 2nd slot of the PRB pair group semi-statically reserved by the eNB for the relay or relay .
    [0002]
    2. METHOD, according to claim 1, characterized by: when the control resource is the R-CCE, the step of execution by the RN of the detection in the control resource according to the index of the R-CCE to acquire the own control information comprises: said acquisition by the RN of an RN-specific search space according to an RN's identity, a secondary frame number of a long-route secondary frame, an aggregation level of a CCE and a number of candidate control channels, where the RN-specific search space is denoted by an index of R-CCE; and in which the RN performs blind detection on the R-CCEs in the RN-specific search space, and if an R-CCE that matches the RN's own identity is detected, the downlink control information loaded into the R-CCEs will be the RN's own control information.
    [0003]
    3. METHOD, according to claim 2, characterized in that: said RN-specific search space is:
    [0004]
    4. METHOD, according to claim 1, characterized by: the step of execution by the RN of the detection in the control resource according to the index of the control resource comprises: the notification by the eNB of the index of the control resource of the R- RN's PDCCH via broadcast signaling, upper layer signaling or message 2 in a random access process, and further performing detection on the control resource corresponding to the control resource's index; and notification by the eNB of the respective indices of a DL grant and an UL grant of the RN via broadcast signaling, upper layer signaling or message 2 in the random access process, and further performing detection on the resource. corresponding to the respective indices of the DL grant and the UL grant.
    [0005]
    5. METHOD, according to claim 4, characterized in that: the eNB notifies the RN's R-PDCCH control resource index through a bitmap; or the eNB notifies the RN's R-PDCCH control resource index via a tree structure.
    [0006]
    6. METHOD, according to claim 4, characterized in that: the step of execution by the RN of the detection in the control resource according to the index of the control resource comprises: pointing out several levels of aggregation between the RN and the index of the control resource through the eNB and the RN, and further performing detection on the control resource that matches the control resource index.
    [0007]
    7. METHOD, according to claim 6, characterized in that: the eNB notifies a change in the aggregation level between the RN and the control resource index through a transmission channel of the RN.
    [0008]
    8. METHOD, according to claim 1, characterized in that when the control resource is transmitted in the R-CCE, the RN's DL concessions are interleaved with each other, and the RN's UL concessions are interleaved with each other; the step of reception by the RN of the downlink control information loaded on the R-PDCCH sent by the eNB to acquire the control resource further comprises: the reception by the RN of a DL grant interleaved in a first slot of a group of PRB pairs semi-statically reserved by the eNB for the relay, performing Fast Fourier Transform, FFT, and de-interlacing to acquire a plurality of R-CCEs DL grants; receiving an UL grant interleaved in a second slot of a group of PRB pairs semi-statically reserved by the eNB for the relay, performing Fast Fourier Transform, FFT, and de-interlacing to acquire a plurality of R-CCE grants of UL; and wherein the RN performs detection in a DL grant search space and an UL grant search space, respectively.
    [0009]
    9. DEVICE TO DETECT DOWNLINK CONTROL INFORMATION THAT IS APPLIED TO A RELAY NODE, which device comprises a receiving unit and a detection unit, characterized in that: the receiving unit is configured: to receive the loaded control information on a physical relay downlink control channel, R-PDCCH, sent by an evolved node B, eNB to acquire a control resource; the detection unit is configured: to perform detection on the control resource acquired by the receiving unit according to an index of the control resource to acquire the RN's downlink control information; where the control resource is based on an R-CCE, R-PDCCHs of said RN are interleaved with each other, the receiving unit is configured as: receiving the control information born in the R-PDCCH sent by the eNB in a group of PRBs or PRB pairs reserved semi-statically by the eNB for the relay, and performing Fast Fourier Transform (FFT) and deinterleaving to acquire a plurality of R-CCEs; receiving a DL grant interleaved in a first slot of the PRB pair group semi-statically reserved by the eNB for the relay and receiving a UL grant interleaved in a 2nd slot of the PRB pair group semi-statically reserved by the eNB for the relay or the relay .
    [0010]
    Device according to claim 9, characterized in that the detection unit is configured: to acquire an RN-specific search space according to an identity of the RN, a secondary frame number of a forwarding secondary frame. time-consuming route, an aggregation level of a CCE and a number of candidate control channels, to perform blind detection on the R-CCEs in the RN-specific search space, and if the R-CCE that corresponds to the RN's own identity is detected, the control information loaded in the R-CCEs will be the RN's own control information; where the RN-specific search space is denoted by an index of R-CCE.
    [0011]
    The device of claim 10, characterized in that: the detection unit is configured: to detect a DL grant in a first slot and to detect a UL grant in a second slot; wherein a DL grant specific search space and an UL grant specific search space are respectively denoted by a respective index of R-CCE.
    [0012]
    12. DEVICE according to claim 9, characterized in that the detection unit is also configured: to perform additional detection on the control resource that corresponds to the control resource index according to the control resource index of R- PDCCH of the RN notified by the eNB via broadcast signaling, upper layer signaling or message 2 in a random access process; and to perform an additional detection in the control resource that corresponds to the respective indices of a DL grant and an UL grant by the eNB in accordance with the respective DL grant and UL grant indices of the RN notified by the eNB through the broadcast signaling, upper layer signaling or message 2 in the random access process.
    [0013]
    13. DEVICE according to claim 9, characterized in that the detection unit is also configured: to point out various levels of aggregation between the RN and the index of the control resources through the eNB and the RN, and to perform an additional detection in the control resources that correspond to the index of the control resources.
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    同族专利:
    公开号 | 公开日
    US8804641B2|2014-08-12|
    EP2482592A1|2012-08-01|
    JP6026278B2|2016-11-16|
    KR101410961B1|2014-06-25|
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    BR112012001321A2|2018-03-13|
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    WO2011035675A1|2011-03-31|
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    法律状态:
    2019-01-08| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-02-11| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04W 48/12 Ipc: H04W 48/12 (2009.01), H04W 84/04 (2009.01), H04L 5 |
    2020-02-11| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-04-06| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-18| B16A| Patent or certificate of addition of invention granted|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 25/08/2010, OBSERVADAS AS CONDICOES LEGAIS. PATENTE CONCEDIDA CONFORME ADI 5.529/DF |
    优先权:
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    CN2009101778457A|CN102036262A|2009-09-25|2009-09-25|Detecting method and device for descending control information|
    CN200910177845.7|2009-09-25|
    PCT/CN2010/076355|WO2011035675A1|2009-09-25|2010-08-25|Method and device for detecting downlink control information|
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