WO2013138980A1 - Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée - Google Patents

Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée Download PDF

Info

Publication number
WO2013138980A1
WO2013138980A1 PCT/CN2012/072543 CN2012072543W WO2013138980A1 WO 2013138980 A1 WO2013138980 A1 WO 2013138980A1 CN 2012072543 W CN2012072543 W CN 2012072543W WO 2013138980 A1 WO2013138980 A1 WO 2013138980A1
Authority
WO
WIPO (PCT)
Prior art keywords
res
cce
pdcch
allocated
base station
Prior art date
Application number
PCT/CN2012/072543
Other languages
English (en)
Chinese (zh)
Inventor
张健
张元涛
张翼
王轶
周华
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2012/072543 priority Critical patent/WO2013138980A1/fr
Publication of WO2013138980A1 publication Critical patent/WO2013138980A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver

Definitions

  • the present invention relates to a control information transmission technology in a communication system, and more particularly to a resource allocation method, a distributed transmission method and apparatus for an enhanced physical downlink control channel in an LTE-A (LTE-Advanced, Enhanced Long Term Evolution) system .
  • LTE-A LTE-Advanced, Enhanced Long Term Evolution
  • the PDCCH Physical Downlink Control CHannel
  • the base station transmits downlink scheduling to the user (UE, User Equipment).
  • the allocation and uplink scheduling give equal control signaling, so that the user can know information such as resource allocation and transmission mode used for uplink and downlink transmission.
  • the correct reception of the PDCCH is a prerequisite for successful demodulation of the data channel, so it plays an important role in system design.
  • the PDCCH occupies the first M OFDM (Orthogonal Frequency Division Multiplexing) symbols per subframe, and the M value ranges from 1 to 4; In the frequency domain, the PDCCH is distributed to the entire system bandwidth.
  • the PDCCH is used to carry downlink control information (DCI, Downlink Control Information), and the control channel element (CCE, Control Channel Element) is configured as a minimum unit.
  • DCI Downlink Control Information
  • CCE Control Channel Element
  • One PDCCH (DCI) may be composed of L CCEs, where each CCE includes 36.
  • resource particles (RE, resource Element), L in the range of 1, 2, 4, 8, showing the degree of polymerization different from the PDCCH (aggregation level) 0 of each CCE 9 and can be seen as RE groups (REG, RE Group), each REG contains 4 REs, and the REG size (4RE) is the smallest unit of PDCCH interleaving and resource mapping.
  • REG resource Element
  • REG resource Element
  • each REG contains 4 REs
  • the REG size (4RE) is the smallest unit of PDCCH interleaving and resource mapping.
  • the PDCCH search space referred to herein includes a common search space and all user-specific (UE-specific) search spaces, and is used to indicate a location where all PDCCHs may appear.
  • Figure 1 assumes that the total number of REGs that the PDCCH region can accommodate is N REe , so the total number of available REs it contains is 4N REC , which can be divided into N: water CCE, and CCE "CCE N constitutes the PDCCH search.
  • the cable space contains the locations where all PDCCHs may occur, and REs with less than 1 CCE will not be utilized by the PDCCH, which is labeled "unused RE" in Figure 1.
  • the search space of Figure 1 actually represents the complex between PDCCHs.
  • the bit stream constituting CCE Q ⁇ CCE N is sequentially subjected to scrambling, QPSK (Quadature Phase Shift Keying) modulation, layer mapping, and SFBC (Space Frequency Block Code).
  • the interleaving process is performed in all N REC REG ranges, that is, the unused REs also participate in interleaving, and participate in determining the PDCCH interleaving. position.
  • the resource mapping of the PDCCH is performed in the form of the REG, in the form of the first-time and post-frequency.
  • Figure 3 shows the PRB pair, the physical resource block pair (physical resource block pair) as an example, and the REG is given on the time-frequency resource. The way of dividing.
  • Figure 3 shows the REG position within a PRB pair.
  • the left figure shows the REG position in the PDCCH, where the PDCCH occupies the first 3 OFDM symbols; the right picture shows the REG partition in the R-PDCCH (Relay PDCCH), which is the base station eNB and the relay node (Relay Node) Inter-control channel, which is transmitted in the legacy PDSCH region, and a single R-PDCCH cannot be mapped across slots, so Figure 3 shows the location of the REG in the first slot, the second slot is the same. Available.
  • the division of the REG in the R-PDCCH is to support the R-PDCCH transmission of the interleaving mode.
  • the processing module before the REG mapping mostly reuses the PDCCH structure described above, and is not repeated, and the DM-RS reference signal does not appear in the PRB pair where the R-PDCCH is located.
  • Figure 3 shows the difference between R-PDCCH and PDCCH in REG mapping.
  • the number of REGs included in each PRB pair is always an integer.
  • the PDCCH/R-PDCCH will perform multi-antenna transmission in SFBC mode.
  • E-PDCCH Enhanced Physical Downlink Control Channel
  • Enhanced PDCCH has been incorporated into the standardization process of Release 11, and is under discussion and research.
  • the E-PDCCH is transmitted in the PDSCH region, which can alleviate the capacity problem on the one hand.
  • Existing data channel enhancement techniques can also be utilized. In order to ensure the robustness of E-PDCCH transmission, a distributed transmission mode supporting E-PDCCH is also required.
  • the E-PDCCH distributed transmission can reuse the transmission mode of the PDCCH, including CCE size, REG based interleaving, REG mapping, and SFBC transmission.
  • the traditional PDCCH method directly applied to the E-PDCCH transmission may cause insufficient utilization of resources.
  • FIG. 4 illustrates this problem by two examples.
  • the E-PDCCH is not distributed to the entire system bandwidth, and only occupies several PRB pairs spaced apart from each other in frequency.
  • FIG. 4 assumes that the E-PDCCH occupies four PRB pairs uniformly dispersed in the system bandwidth.
  • the reference signal is configured as 4 CRS ports, 4 DM-RS ports, and 4 CSI-RS ports.
  • 4 PRB pairs can be used.
  • the remaining 28 REs are not used by E-PDCCH.
  • 28 REs are equivalent to 1/4 of a PRB pair in terms of magnitude, and such resource utilization is not ideal. Resources are underutilized.
  • the traditional PDCCH and the R-PDCCH also have the same problem, that is, there are unused REs, but for the PDCCH, since the total system bandwidth is occupied, the total number of available REs is large, so the percentage of unused REs is not A high level of E-PDCCH is achieved; for the R-PDCCH, since the number of relay nodes is much smaller than the number of users in the E-PDCCH, the requirement for resource utilization is not as tight as the E-PDCCH.
  • the reuse of the traditional PDCCH method in the E-PDCCH causes the problem that the resources allocated to the E-PDCCH cannot be fully utilized.
  • FIG. 5 illustrates this issue.
  • Figure 5 (1) shows a schematic diagram of REG partitioning in the E-PDCCH region according to the conventional PDCCH scheme.
  • the REG partition is not different from the PDCCH, but for the OFDM symbol in which the DM-RS is located, the conventional REG
  • the division mode may cause the two REs constituting the SFBC transmission to be excessively spaced in frequency.
  • the two REs constituting the SFBC transmission labeled in Figure 5 (1) are separated by 5 REs, which is not conducive to SFBC demodulation.
  • one PRB pair in Fig. 5 (1) cannot be divided into an integer number of REGs.
  • one method is to use STBC (Space Time Block Code) in the OFDM symbol in which the DM-RS/CSI-RS is located, and two adjacent STBCs (the same)
  • the occupation of 4 REs is defined as one REG, as shown in Figure 5 (2), while other OFDM symbols still use the REG definition of the legacy PDCCH.
  • the performance loss of the SFBC can be avoided, but whether the E-PDCCH resource can be divided into an integer number of REGs depends on the reference signal configuration and the number of PRB pairs allocated for the E-PDCCH.
  • the root cause is that a PRB pair may not be able to be divided. Is an integer number of REGs. As shown in Figure 5 (2), the PRB pair cannot be divided into an integer number of REGs, and 2 unused REs remain.
  • An object of the embodiments of the present invention is to provide a resource allocation method, a distributed transmission method, and an apparatus for an enhanced physical downlink control channel in an LTE-A system, so as to overcome the technical problem of insufficient resource utilization caused by reusing the traditional PDCCH method. .
  • a resource allocation method for an enhanced physical downlink control channel includes:
  • the remaining REs of less than one CCE are allocated to the CCE.
  • a distributed transmission method of an E-PDCCH includes:
  • the CCEs of the REs of the remaining less than one CCE are interleaved and resource mapped in units of pre-defined RE groups.
  • a base station includes: a dividing unit, which divides an RE allocated to an E-PDCCH into a plurality of CCEs according to a predetermined size of a CCE; It allocates the remaining REs of less than one CCE to the CCE according to a predetermined policy.
  • a method for distributed transmission of an E-PDCCH is provided, where the method includes:
  • the REs allocated to the E-PDCCH are interleaved and resource mapped in units of pre-defined RE groups; wherein the pre-defined RE groups include 2 REs for each RE group.
  • a base station includes: a dividing unit that performs resource division by using an RE allocated to an E-PDCCH;
  • a transmission unit that performs interleaving and resource mapping on REs allocated to the E-PDCCH in units of pre-defined RE groups;
  • the pre-defined RE group includes 2 REs for each RE group.
  • a resource allocation method for an E-PDCCH includes:
  • each physical resource block pair (PRB pair) allocated for the E-PDCCH is divided into a plurality of enhanced control channel particles (E-CCE) according to a predetermined policy with two adjacent REs as a minimum unit.
  • E-CCE enhanced control channel particles
  • a method for distributed transmission of an E-PDCCH includes:
  • Each of the PRBs allocated to the E-PDCCH is divided into a plurality of E-CCEs according to a predetermined policy by using two adjacent REs as a minimum unit;
  • the pre-defined RE group includes 2 REs for each RE group.
  • a base station includes: a dividing unit that uses two adjacent REs as a minimum unit, and allocates each of the E-PDCCHs according to a predetermined policy.
  • the PRB divides the included RE into multiple E-CCEs.
  • a computer readable program wherein, when the program is executed in a base station, the program causes a computer to perform the foregoing resource allocation method of the E-PDCCH in the base station; Alternatively, the program causes the computer to perform the aforementioned distributed transmission method of the E-PDCCH in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the foregoing resource allocation method of the E-PDCCH in a base station, or the foregoing A distributed transmission method of E-PDCCH.
  • the resource partitioning method and the distributed transmission method in the embodiment of the present invention overcome the method of dividing the RE resources allocated to the E-PDCCH according to the traditional resource partitioning method of the PDCCH.
  • the resulting resources exploit inadequate technical issues.
  • FIG. 2 is a schematic diagram of a PDCCH interleaving process
  • Figure 3 is a schematic diagram of REG resource division
  • Figure 5 is a schematic diagram of REG resource division
  • FIG. 6 is a flowchart of a resource allocation method of an E-PDCCH according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of a distributed transmission method of an E-PDCCH according to an embodiment of the present invention.
  • Figure 8 is a schematic diagram of redistribution of unused REs
  • FIG. 9 is a schematic diagram of an interleaving process of an E-PDCCH
  • FIG. 10 is a schematic diagram of resource and reference signal configuration of an E-PDCCH
  • FIG. 14 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 15 is a flowchart of a distributed transmission method of an E-PDCCH according to another embodiment of the present invention.
  • FIG. 16 is a schematic diagram of a base station according to another embodiment of the present invention.
  • FIG. 17 is a flowchart of a resource allocation method of an E-PDCCH according to another embodiment of the present invention.
  • FIG. 18 is a flowchart of a distributed transmission method of an E-PDCCH according to another embodiment of the present invention.
  • FIG. 19 is a schematic diagram of an existing E-CCE division;
  • 21 is a schematic diagram of an E-CCE search space
  • 22 is a schematic diagram of an E-CCE interleaving process
  • Figure 24 is a schematic diagram of an E-CCE search space
  • Figure 25 is a block diagram showing the composition of a base station according to another embodiment of the present invention. detailed description
  • FIG. 6 is a flow chart of the method, please refer to Figure 6, the method includes:
  • Step 601 Divide the RE allocated to the E-PDCCH into multiple CCEs according to a predetermined size of the CCE.
  • Step 602 Assign the remaining REs of less than one CCE to the CCE according to a predetermined policy.
  • the predetermined size of the CCE is generally 36 REs.
  • the REs of less than one CCE will not be utilized, and the embodiment of the present invention will This part of the unused RE is reassigned to the CCE for use.
  • the most flexible allocation method is which CCEs are assigned to REs, and the number of REs allocated by each CCE is informed to the user, but such flexible RE allocation is not necessary from the perspective of notification overhead and search space requirements.
  • the remaining REs of less than one CCE also referred to as unused in the following description
  • reassign it to several CCEs making these CCEs exceed the size limit of 36 REs.
  • the unused REs may be first divided into groups, each group including a predetermined number of REs, and then each group of REs is assigned to at least one CCE according to a predetermined policy. If there are REs that are not grouped in this part of the unused RE, then this part of the RE that cannot be grouped is assigned to a CCE according to the principle of resource division.
  • the predetermined number is an even number, for example, 2 or 4, that is, the unused REs are divided into groups, each group including 2 REs or 4 REs.
  • the predetermined policy is, for example, first assigning to the even-numbered CCEs according to the cyclic shifting manner, and then allocating to the odd-numbered CCEs; or, according to the cyclic shifting manner, first assigning the odd-numbered CCEs. , and then assigned to the even-numbered CCE; or, to the CCE of the specified number.
  • the predetermined policy may be other methods as long as the unused RE can be reassigned to the CCE, and the embodiment is not limited thereto.
  • the unused REs may be first divided into multiple groups of multiple sizes, and then each group of REs is allocated to one CCE according to a predetermined policy, wherein the number of REs of each size is It is even.
  • an unused RE is divided into multiple groups of two sizes, one size is 2 REs, and the other size is 4 REs, and then each group of REs is assigned to one CCE according to a predetermined policy.
  • a predetermined policy For example, follow the loop In the bit mode, a group of 2 REs is assigned to an odd-numbered CCE, and a group of 4 REs is assigned to an even-numbered CCE.
  • the method in this embodiment is applicable to the transmission of the user search space of the E-PDCCH, and is also applicable to the transmission of the common search space of the E-PDCCH.
  • the method of the embodiment of the present invention is applicable to control information transmission using SFBC.
  • the embodiment of the invention further provides a distributed transmission method of an E-PDCCH.
  • Figure 7 is a flow chart of the method, please refer to Figure 7, the method includes:
  • Step 701 The RE that is allocated to the E-PDCCH is divided into multiple CCEs according to the predetermined size of the CCE.
  • Step 702 Allocate the remaining REs of less than one CCE to the CCE according to a predetermined policy.
  • Step 703 The defined RE group is a unit, and performs interleaving and resource mapping on CCEs that allocate the remaining REs of less than one CCE.
  • the pre-defined RE group contains 2 REs for each RE group, and step 703 performs interleaving and resource mapping for CCEs that have allocated unused REs in units of 2 REs.
  • the steps 701 and 703 can be implemented according to the methods of step 601 and step 602 of the embodiment 1.
  • the content of the method is incorporated herein, and details are not described herein.
  • REs that are not utilized are reassigned to use by several CCEs such that these CCEs can exceed the size limit of a predetermined size (36 REs). Since these additional CCEs that obtain RE resources do not necessarily contain an integer number of REGs, the interleave based on the REG size (4 REs) is no longer applicable, so the inventive embodiment accordingly interleaves and maps with 2 REs as the smallest unit.
  • the method in this embodiment is applicable to the transmission of the user search space of the E-PDCCH, and is also applicable to the transmission of the common search space of the E-PDCCH.
  • the method of the embodiment of the present invention is applicable to control information transmission using SFBC.
  • Figure 8 shows a simple and feasible RE assignment process diagram.
  • the unused REs are divided into groups of k REs, and several packets can be obtained, and each packet (ie, k REs) is again allocated to one CCE, thereby increasing the size of the CCE.
  • the control channel particles of the E-PDCCH are generally referred to as E-CCE.
  • the RE redistribution process follows some basic principles, for example: the number of k should be even, thus ensuring smooth implementation of SFBC coding; for example: determining which CCEs an unused RE will be assigned according to certain rules; for example: For allocation A possible packet of less than k REs is finally assigned to a CCE.
  • Both the base station and the user (UE) follow the above basic principles, so the user can restore the operation of the originating base station, thereby demodulating the control information sent to itself.
  • the allocation process generates an E-CCE containing 36+k REs due to
  • E-CCE 36+k is not necessarily a multiple of 4, and an E-CCE does not necessarily contain an integer number of REGs, so the REG-based interleaving in the legacy PDCCH is no longer applicable here.
  • Embodiments of the present invention define new REG sizes to address this problem.
  • the resource particle group in the E-PDCCH is called E-REG, and each E-REG is defined by 2 REs.
  • Each E-CCE will contain an integer number of E-REGs, which can be based on the E-REG size (2).
  • the subsequent resource mapping is also performed in units of E-REG.
  • mapping resources in units of E-REG is beneficial to the full utilization of resources, and also facilitates the implementation of SFBC/STBC.
  • Figure 9 shows the interleaving process in E-REG.
  • FIG. 10 is a schematic diagram showing the configuration of an E-PDCCH resource and a reference signal.
  • a predetermined policy can be set, as described above, according to a predetermined policy.
  • the allocation is made to the even-numbered CCE and then to the odd-numbered CCE.
  • the rules that is, the predetermined strategy
  • this way is beneficial to ensure that the highly aggregated E-PDCCH still has similar dimensions.
  • other rules can also be used to determine the location of the CCE that can allocate the RE, not enumerated.
  • FIG. 11 is a schematic diagram of allocating E-PDCCH resources shown in FIG. 10 according to a method according to an embodiment of the present invention.
  • the E-CCE has both 36 and 40 sizes.
  • all E-CCEs are interleaved with 2 REs as the minimum unit, and the interleaving process is still as shown in Fig. 9.
  • a new E-REG sequence is obtained, and the resource mapping is performed in units of E-REG.
  • the E-REG position can be divided for each PRB pair according to the manner of FIG.
  • the number of REs available for E-PDCCH in a PRB pair is always an even number. Therefore, resource mapping with 2 RE units can always guarantee that a PRB pair contains an integer number of E-REGs.
  • the use of 2 REs as resource mapping units facilitates SFBC/STBC implementation.
  • the OFDM symbols appearing for DM-RS and CSI-RS can be STBC mapped, which can avoid the situation where multiple REs are separated between the same SFBC codes in Figure 5 (1).
  • the E-REG sequence output after the final interleaving will be mapped to all four P B pairs, and each PRB pair will be mapped according to the position shown in Figure 12.
  • assign the group containing 4 REs to the even-numbered CCEs such as CCEs numbered 0, 2, 4, and assign the group containing 2 REs to the odd-numbered CCEs and other even-numbered CCEs.
  • the foregoing allocation rules are merely illustrative, and the embodiment is not limited thereto.
  • the present invention further provides a base station, as described in Embodiment 3 below, the principle of solving the problem by the base station is similar to the resource allocation method and the distributed transmission method of the E-PDCCH of Embodiment 1 or Embodiment 2, For specific implementations, reference may be made to the implementation of the methods of Embodiment 1 and Embodiment 2, and the details are not described again.
  • the embodiment of the invention further provides a base station.
  • 14 is a schematic diagram of the composition of the base station. Referring to FIG. 14, the base station includes:
  • a dividing unit 141 which divides the RE allocated to the E-PDCCH into a plurality of CCEs according to a predetermined size of the CCE
  • the allocating unit 142 allocates the remaining REs of less than one CCE to the CCE according to a predetermined policy.
  • the allocating unit 142 includes:
  • a first dividing module 1421 which divides the remaining REs of less than one CCE into multiple groups, each group including a predetermined number of REs;
  • a first allocating module 1422 which allocates the REs of each group to at least one of the CCEs according to a predetermined policy
  • the predetermined number is an even number.
  • the first allocating module 1422 allocates the RE that cannot be grouped to a CCE when there are REs that are not grouped in the remaining REs.
  • the allocating unit 142 includes:
  • a second dividing module 1423 which divides the remaining REs of less than one CCE into multiple groups having multiple sizes
  • the second allocating module 1424 assigns each group of REs to one of the CCEs according to a predetermined policy; wherein the number of REs of each size is an even number.
  • the base station may further include:
  • the transmitting unit 143 performs interleaving and resource mapping on the CCEs that allocate the remaining REs of less than one CCE in units of pre-defined RE groups;
  • the pre-defined RE group includes 2 REs for each RE group.
  • the unused REs are reassigned to a number of CCEs, so that the CCEs can exceed the size limit of 36 REs, thereby overcoming the resources according to the conventional PDCCH.
  • the division method when dividing the RE resources allocated to the E-PDCCH, the technical problem of insufficient utilization of the generated resources.
  • the embodiment of the invention further provides a distributed transmission method of an E-PDCCH.
  • Figure 15 is a flow chart of the method. Referring to Figure 15, the method includes:
  • Step 1501 Perform resource division on the RE allocated to the E-PDCCH.
  • Step 1502 Perform interleaving and resource mapping on the RE allocated to the E-PDCCH in units of pre-defined RE groups.
  • the pre-defined RE group includes 2 REs for each RE group.
  • the REs allocated to the E-PDCCH are not limited.
  • the REs allocated to the E-PDCCH may be divided according to the resource partitioning methods of Embodiment 1 and Embodiment 2; In some methods, each PRB pair allocated to the E-PDCCH is first divided into several equal parts, each of which is used as an E-CCE, so that the E-CCE will no longer be limited by the size of 36 REs, so there will be no The RE resource being used.
  • step 1502 the REs allocated to the E-PDCCH are interleaved and resource mapped in units of 2 REs.
  • the present invention further provides a base station, as described in the following embodiment 5.
  • the principle of the problem solved by the base station is similar to the distributed transmission method of the E-PDCCH of the fourth embodiment. The implementation of the method, the same points will not be repeated.
  • the embodiment of the invention further provides a base station.
  • 16 is a schematic diagram of the composition of the base station. Referring to FIG. 16, the base station includes:
  • a dividing unit 161 which performs resource division on the RE allocated to the E-PDCCH;
  • a transmitting unit 162 which performs interlacing and resource mapping on REs allocated to the E-PDCCH in units of pre-defined RE groups;
  • the pre-defined RE group includes 2 REs for each RE group.
  • the embodiment of the invention further provides a resource allocation method for an E-PDCCH.
  • Figure 17 is a flow chart of the method. Referring to Figure 17, the method includes:
  • Step 1701 divide the RE included in each PRB pair allocated for the E-PDCCH into multiple E-CCEs according to a predetermined policy by using two adjacent REs as a minimum unit.
  • the predetermined policy may be: first dividing the REs in the frequency domain, and dividing the REs in the frequency domain does not ensure that the two REs are adjacent, and dividing the REs in the time domain.
  • each of the PRBs allocated for the E-PDCCH may be divided into four E-CCEs.
  • the method in this embodiment is applicable to the transmission of the user search space of the E-PDCCH, and is also applicable to the transmission of the common search space of the E-PDCCH.
  • the method of the embodiment of the present invention is applicable to control information transmission using SFBC.
  • each PRB pair allocated to the E-PDCCH is divided into several CCEs, and two adjacent REs are used as a minimum unit in the division, and each CCE is ensured to have a similar RE size.
  • the method does not generate an unused RE, and solves the performance inequality caused by the large difference in the size of the divided E-CCEs in the existing partitioning method.
  • the embodiment of the invention further provides a distributed transmission method of an E-PDCCH.
  • Figure 18 is a flow chart of the method. Referring to Figure 18, the method includes:
  • Step 1801 divide the RE included in each PRB allocated to the E-PDCCH into multiple E-CCEs according to a predetermined policy by using two adjacent REs as a minimum unit;
  • Step 1802 Perform interleaving and resource mapping on the REs included in each PRB pair allocated to the E-PDCCH in units of pre-defined RE groups or in units of the E-CCE.
  • the pre-defined RE group includes 2 REs for each RE group.
  • the step 1801 can be implemented by the step 1701 of the embodiment 6, and the content thereof is incorporated herein, and details are not described herein again.
  • the method in this embodiment is applicable to the transmission of the user search space of the E-PDCCH, and is also applicable to the transmission of the common search space of the E-PDCCH.
  • the method of the embodiment of the present invention is applicable to control information transmission using SFBC.
  • each E-CCE is substantially the same, and the performance inequality is overcome; in the aspect of interleaving and mapping, interleaving and mapping are performed in units of E-CCE, or The two REs are interleaved and mapped, ensuring that the two REs used as SFBC are always adjacent to each other, improving the transmission performance of the SFBC.
  • each P B pair into several equal parts, each serving as an E-CCE.
  • the E-CCE will no longer be limited by the size of 36 REs, so there will be no unused RE resources. For example, divide a PRB pair into 4 E-CCEs.
  • Figure 19 shows a conventional frequency division method.
  • FIG. 20 is a schematic diagram of E-CCE division (multiplexing) according to the method of the embodiment of the present invention.
  • Figure 20 shows two examples of E-CCE partitioning. All REs marked with "0" constitute E-CCE Q , and so on. The division is performed with 2 adjacent REs (E-REG) as the smallest unit to facilitate SFBC/STBC mapping. In the OFDM symbols in which DM-RS and CSI-RS appear, there may be STBC mode mapping, and others are mapped in SFBC mode. Each of the four E-REGs constitutes a numbered cycle, thereby ensuring that the PRB is equally divided as much as possible. According to this division, in the end, the difference between the different E-CCEs is at most 2 REs, so that the maximum division can be achieved.
  • E-REG 2 adjacent REs
  • FIG. 20 multiplexes four E-CCEs as an example. For other numbers of E-CCE multiplexes, they can be divided in a similar manner, and are not enumerated.
  • the foregoing E-CCE multiplexing scheme actually determines the number of REs included in each E-CCE, and globally numbers all E-CCEs in the four PRB pairs allocated to the E-PDCCH, and can also form the search space used previously. Concept, the search space is shown in Figure 21.
  • the new E-CCE sequence output is obtained, and then the resource mapping can be performed according to the E-CCE resource location defined in FIG. 20, and the new E-CCE sequence is mapped to the four PRB pairs of the E-PDCCH. transmission.
  • the definition of the previous E-REG can still be used, and the E-REG is used as the minimum unit for interleaving, that is, the interleave of 2 RE units, and then according to the rule of FIG. Perform resource mapping in units of E-REG. Since the interleaving and resource mapping are performed based on E-REG, the E-CCE partitioning shown in Fig. 20 actually only serves to evenly divide the size of each E-CCE.
  • Figure 20 divides to get the exact same E-CCE size. Another embodiment is given below, in which the multiplexed E-CCEs are different in size, but the above procedure is equally applicable.
  • Figure 23 shows the multiplexing of two E-CCEs in one PRB pair.
  • Figure 24 shows an example of an E-CCE with 28 REs in every 4 E-CCEs.
  • E-CCE arrangements can also have other options, as long as the base station and the user agree on this.
  • the E-REG sequence is further mapped in units of E-REG.
  • the location of the E-REG in the PRB pair is shown in Figure 12. All E-REGs are mapped to the four PRB pairs in which the E-PDCCH is located. Interleaving and resource mapping can also be performed in units of E-CCE, and will not be described again.
  • the user For a scheme of multiplexing multiple E-CCEs in a PRB pair, the user performs demapping and deinterleaving operations, and the user can know the corresponding search space location by knowing the number of E-CCEs multiplexed within one PRB pair, and then Perform blind detection and demodulation of the E-PDCCH.
  • the base station can semi-statically configure the number of E-CCEs multiplexed within one PRB.
  • the present invention further provides a base station, as described in the following Embodiment 8, the principle of solving the problem by the base station is similar to the resource allocation method and the distributed transmission method of the E-PDCCH of Embodiment 6 or Embodiment 7, For specific implementations, reference may be made to the implementation of the methods of Embodiment 6 and Embodiment 7, and the same portions are not described again.
  • the embodiment of the invention further provides a base station.
  • 25 is a schematic structural diagram of the base station. Referring to FIG. 25, the base station includes:
  • the dividing unit 251 divides the RE included in each PRB pair allocated to the E-PDCCH into a plurality of E-CCEs according to a predetermined policy by using two adjacent REs as a minimum unit.
  • the base station further includes:
  • the transmitting unit 252 is configured to perform interleaving and resource mapping on the RE included in each PRB pair allocated to the E-PDCCH in units of a predefined RE group or in units of the E-CCE;
  • the pre-defined RE group includes 2 REs for each RE group.
  • the predetermined policy is: first, the REs in the frequency domain are divided, and when the REs in the frequency domain are not divided to ensure that the two REs are adjacent, the REs in the time domain are divided.
  • each E-CCE is substantially the same, which overcomes performance inequality; in terms of interleaving and mapping, interleaving and mapping are performed in units of E-CCE, or The two REs are interleaved and mapped, ensuring that the two REs used as SFBC are always adjacent to each other, improving the transmission performance of the SFBC.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a base station, the program causes the computer to execute the resource of the E-PDCCH described in Embodiment 1 or Embodiment 6 in the base station. Or the allocation method; or the program causes the computer to perform the distributed transmission method of the E-PDCCH described in Embodiment 2, Embodiment 4 or Embodiment 7 in the base station.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the resource allocation method of the E-PDCCH described in Embodiment 1 or Embodiment 6 in a base station, Or the distributed transmission method of the E-PDCCH according to Embodiment 2, Embodiment 4 or Embodiment 7.
  • the above apparatus and method of the present invention may be implemented by hardware, or may be implemented by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente invention portent sur un procédé d'attribution de ressources d'un E-PDCCH et sur un procédé et un dispositif de transmission distribuée. Selon un mode de réalisation, le procédé d'attribution de ressources consiste : à diviser un RE attribué à un E-PDCCH en de multiples CCE selon une taille préréglée d'un CCE ; et à attribuer le reste du RE, qui est inférieur à un CCE, au CCE selon une politique préétablie. Les modes de réalisation de la présente invention résolvent le problème technique de l'utilisation incomplète des ressources durant une attribution de ressources et une transmission distribuée de l'E-PDCCH si un procédé PDCCH classique est réutilisé.
PCT/CN2012/072543 2012-03-19 2012-03-19 Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée WO2013138980A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/072543 WO2013138980A1 (fr) 2012-03-19 2012-03-19 Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2012/072543 WO2013138980A1 (fr) 2012-03-19 2012-03-19 Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée

Publications (1)

Publication Number Publication Date
WO2013138980A1 true WO2013138980A1 (fr) 2013-09-26

Family

ID=49221783

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2012/072543 WO2013138980A1 (fr) 2012-03-19 2012-03-19 Procédé d'attribution de ressources, et procédé et dispositif de transmission distribuée

Country Status (1)

Country Link
WO (1) WO2013138980A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011119765A1 (fr) * 2010-03-23 2011-09-29 Qualcomm Incorporated Utilisation efficace des ressources dans un système de duplexage par répartition temporelle (tdd)
CN102300270A (zh) * 2010-06-25 2011-12-28 电信科学技术研究院 回程链路控制信道信息的资源配置方法和设备

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011119765A1 (fr) * 2010-03-23 2011-09-29 Qualcomm Incorporated Utilisation efficace des ressources dans un système de duplexage par répartition temporelle (tdd)
CN102300270A (zh) * 2010-06-25 2011-12-28 电信科学技术研究院 回程链路控制信道信息的资源配置方法和设备

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"3GPP TECHNICAL SPECIFICATION GROUP RADIO ACCESS NETWORK.", 3GPP TS 36.211 V10.4.0: EVOLVED UNIVERSAL TERRESTRIAL RADIO ACCESS (E-UTRA). PHYSICAL CHANNELS AND MODULATION (RELEASE 10)., 31 December 2011 (2011-12-31), pages 66 - 67 *
LG ELECTRONICS.: "Concept of E-PDCCH CCE.", 3GPP TSG RAN WG1 MEETING #68, R1-120454, 10 February 2012 (2012-02-10), pages 1, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_57/Docs/R1-120454.zip> *

Similar Documents

Publication Publication Date Title
JP6445595B2 (ja) エンハンスト物理ダウンリンク制御チャネル伝送の方法及び装置
JP7105824B2 (ja) データを送信するための方法と装置
US10200984B2 (en) Wireless communication control channel apparatus and method
EP2847875B1 (fr) Canaux de commande de liaison descendante communs améliorés
US9538507B2 (en) Method and apparatus for transmitting control channel signal in orthogonal frequency division multiplexing communication system
JP2015516128A (ja) 下り制御情報送信方法、検出方法、基地局及びユーザ機器
WO2018141180A1 (fr) Procédé de transmission d&#39;informations de commande, procédé de réception, dispositif, station de base et terminal
WO2013185316A1 (fr) Procédé et dispositif de détermination de ressources de canal de commande de liaison montante
WO2013023541A1 (fr) Procédé et dispositif pour transmettre des données de contrôle sur la liaison descendante
JP2016504801A (ja) 共通サーチスペース及びｕｅ固有サーチスペースをブラインド検出するための方法及び装置
CN117336869A (zh) 用于在无线通信系统中传输控制信息的方法和装置
CN109586888B (zh) 一种控制信道候选的分配方法及装置
WO2013097418A1 (fr) Procédé et dispositif d&#39;attribution de ressource de référence
CN109905221B (zh) 增强型物理下行控制信道传输方法及装置
EP3089418B1 (fr) Procédé et dispositif pour la mise en correspondance entre une ressource de canal de commande de liaison descendante améliorée et un port d&#39;antenne
TW201824908A (zh) 傳輸信息的方法、網絡設備和終端設備
WO2013149594A1 (fr) Procédé et dispositif de configuration de ressources
WO2014019283A1 (fr) Procédé, appareil et système de transmission d&#39;informations de commande
WO2016029455A1 (fr) Procédé et dispositif d&#39;affectation de ressources
WO2013114632A1 (fr) Procédé de cadriciel de multiplexage de dci et conception d&#39;espace de recherche
MX2014007640A (es) Metodo y aparato para la asignacion de recuros de un canal fisico de control de enlace descendente.
WO2014183472A1 (fr) Procédé et dispositif de transmission d&#39;ephich
TW201417606A (zh) 配置用於增強物理下行控制頻道（ｅＰＤＣＣＨ）的增強控制頻道元件（ｅＣＣＥ）的方法
WO2014201620A1 (fr) Procédé et dispositif de détection et d&#39;envoi d&#39;informations de commande de liaison descendante
WO2013138980A1 (fr) Procédé d&#39;attribution de ressources, et procédé et dispositif de transmission distribuée

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12872089

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12872089

Country of ref document: EP

Kind code of ref document: A1