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WO2013067839A1 - Procédé et dispositif d'attribution de ressources pdcch - Google Patents

Procédé et dispositif d'attribution de ressources pdcch Download PDF

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Publication number
WO2013067839A1
WO2013067839A1 PCT/CN2012/080736 CN2012080736W WO2013067839A1 WO 2013067839 A1 WO2013067839 A1 WO 2013067839A1 CN 2012080736 W CN2012080736 W CN 2012080736W WO 2013067839 A1 WO2013067839 A1 WO 2013067839A1
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WIPO (PCT)
Prior art keywords
search space
pdcch
component carriers
pdcch search
component
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PCT/CN2012/080736
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English (en)
Chinese (zh)
Inventor
赵锐
沈祖康
潘学明
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China Academy of Telecommunications Technology CATT
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China Academy of Telecommunications Technology CATT
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Publication of WO2013067839A1 publication Critical patent/WO2013067839A1/fr
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    • 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) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and an apparatus for configuring and configuring a PDCCH resource. Background technique
  • the terminal needs a physical downlink control channel in a common search space and a user equipment (User Equipment, UE)-specific search space.
  • PDCCH Physical Downlink control channel
  • the control channel element (CCE) aggregation level of the PDCCH can only be 4 and 8 in the common search space.
  • CCE control channel element
  • the number of candidate PDCCHs that need to be blindly detected is 4 and respectively.
  • the CCE aggregation level of the PDCCH may be 1, 2, 4, 8; and the number of candidate PDCCHs requiring blind detection is different under each CCE aggregation level, in 3GPP TS36 A description is given in 9.113 of .213, as shown in Table 1:
  • Table 1 PDCCH candidates in UE specific search space (candidates in the UE-specific control space)
  • the number of candidate PDCCHs in the UE-specific search space can be described as [6, 6, 2, 2], public
  • the number of candidate PDCCHs in the search space can be described as [4, 2] respectively.
  • each number corresponds to one transmission mode.
  • two downlink control information Downlink Control Information, DCI
  • DCI Downlink Control Information
  • the number of candidate PDCCHs at the time indicates the number of CCEs in the subframe k.
  • LTE-Advanced LTE-Advanced, LTE-A
  • LTE-A LTE-Advanced, LTE-A
  • LTE-A LTE-Advanced, LTE-A
  • LTE-A LTE-Advanced
  • the current research bias of the standardization organization is that the consensus for carrier aggregation system design is that the design on each carrier remains as consistent as possible with LTE Rel 8, thus ensuring the LTE Rel 8 system.
  • the terminal can work normally on each member carrier.
  • the PDCCH control scheme mainly has the following two modes: Mode 1: Independent scheduling, that is, independent scheduling of each carrier, does not support cross-carrier scheduling, in this case, each The definition of the PDCCH search space of the carrier is consistent with that in LTER8; as shown in FIG. 2A.
  • Mode 2 Cross-carrier scheduling, that is, other carriers can be scheduled by one carrier, as shown in FIG. 2B.
  • the association relationship between the CCs is that, from the perspective of the terminal, one PDSCH/PUSCH CC can be scheduled only through one PDCCH CC, as shown in FIG. 3 .
  • the different PDSCH/PUSCH CCs have respective PDCCH search spaces, and the CCE aggregation level is
  • the number of candidate PDCCHs at [1, 2, 4, 8] are respectively [6, 6, 2, 2], and the search space is defined as follows:
  • each independent search space is cascaded.
  • the position of the CCE starting point is generated according to a hash function, which is defined as follows:
  • the carrier aggregation (CA) aggregation capability of the UE is determined by the configuration of the UE itself. According to the CA aggregation capability of the UE, the number of PDCCH blind detections that the UE can support can be directly determined, as follows:
  • the downlink CA aggregation capability of the UE is N component carriers, and the uplink CA aggregation capability of the UE is K component carriers.
  • the uplink K carriers of the UE are always K members of the downlink N component carriers.
  • the carrier has a fixed relationship indicated by the system information block 2 (SIB2).
  • SIB2 system information block 2
  • the carrier numbers of the uplink component carriers and the downlink component carriers in the fixed association relationship are the same in the DCI information at the time of scheduling, and the search space of the PDCCH is also
  • the CCE aggregation level is [1, 2, 4, 8] in the PDCCH search space corresponding to each CC aggregated by the UE.
  • the number of corresponding candidate PDCCHs is [6, 6, 2, 2] respectively; in this case, the maximum number of PDCCH blind detections supported by the UE can be calculated as follows:
  • the maximum number of blind detections supported by the UE is:
  • a PDSCH/PUSCH CC ie, a component carrier used for transmitting a PDSCH/PUSCH
  • usually only one CC is defined as a primary carrier (Primary CC), and the Primary CC is selected by the base station and controlled by a radio resource (Radio Resource Control)
  • the RRC command is configured for the UE, and the primary CCs of different UEs may be different.
  • the main functions of the Primary CC binding are as follows:
  • the Primary CC is configured with a Physical Uplink Control Channel (PUCCH) for transmitting a Channel Quality Indicator (CQI)/Acknowledged (ACK)/Schedule Request (SR);
  • PUCCH Physical Uplink Control Channel
  • CQI Channel Quality Indicator
  • ACK Acknowledged
  • SR Service Request
  • the downlink of the Primary CC may serve as a UL timing reference carrier for random access;
  • the Primary CC may serve as a path loss reference for the Primary CC and the CC;
  • RACH random access channel
  • SPS semi-persistent scheduling
  • the RLF is considered to occur on the terminal only if the radio link failure (RLF) occurs on the Primary CC.
  • RLF radio link failure
  • the embodiment of the invention provides a PDCCH resource configuration application method and device, which are used to reduce the blocking probability of a PDCCH in a system.
  • a method for configuring a PDCCH resource including:
  • each control channel element CCE in each PDCCH search space corresponding to each component carrier Determining, in the component carrier set configured for the UE, each control channel element CCE in each PDCCH search space corresponding to each component carrier, according to the component carrier set configured for the UE and the carrier aggregation capability information of the UE.
  • the number of candidate PDCCHs in the aggregation level of the UE is such that the total number of PDCCH blind detections in the PDCCH search space corresponding to the component carriers does not exceed the maximum number of PDCCH blind detections supported by the UE;
  • a method for configuring a PDCCH resource including:
  • a blind check is performed on the determined candidate PDCCH to obtain downlink control information sent by the network side.
  • a configuration application device for a PDCCH resource includes:
  • a first communication unit configured to receive carrier aggregation capability information reported by the terminal UE;
  • a processing unit configured to determine a component carrier set configured for the UE, and determine, according to a component carrier set configured by the UE and carrier aggregation capability information of the UE, respectively, a component carrier set configured for the UE
  • the number of candidate PDCCHs in the CCE aggregation level of each control channel element is such that the total number of PDCCH blind detections of the UE in the PDCCH search space corresponding to each component carrier does not exceed the UE support.
  • a second communication unit configured to select at least one candidate PDCCH in the determined candidate PDCCH to send downlink control information to the UE.
  • a configuration application device for a PDCCH resource includes:
  • a first communication unit configured to receive a component carrier set delivered by the network side
  • control unit configured to determine, according to the set of component carriers and local carrier aggregation capability information, candidate PDCCHs in a CCE aggregation level of each control channel element in a PDCCH search space corresponding to each component carrier in a component carrier set The number of PDCCH blind detections in the PDCCH search space corresponding to each component carrier does not exceed the maximum number of PDCCH blind detections supported locally;
  • a second communication unit configured to perform a blind check on the determined candidate PDCCH to obtain downlink control information sent by the network side.
  • a PDCCH resource enhancement configuration scheme is set, and the base station and the UE combine the component carrier set configured for the UE and the CA capability information of the UE to determine the PDCCH search space corresponding to each component carrier in the component carrier set.
  • the number of candidate PDCCHs in each CCE aggregation level so that the base station can send DCI to the UE on the determined candidate PDCCH, and the UE can perform blind detection on the determined candidate PDCCH to obtain the DCI delivered by the base station;
  • the total number of PDCCH blind detections that are actually performed by the UE can be greatly improved, and the PDCCH is prevented from being blocked, and the system performance is improved.
  • the total number of PDCCH blind detections actually performed by the UE does not exceed the maximum PDCCH supported by the UE.
  • FIG. 1 is a schematic diagram of a prior art download wave polymerization
  • 2A is a schematic diagram of the carrier scheduling in the prior art
  • 2B is a schematic diagram of cross-carrier scheduling in the prior art
  • FIG. 3 is a schematic diagram of a relationship between a PDCCH CC and a PDSCH/PUSCH CC in the prior art
  • FIG. 4 is a schematic structural diagram of a base station in an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a terminal function according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of configuring, by a base station, a PDCCH resource for a UE according to an embodiment of the present invention
  • FIG. 7 is a flowchart of configuring, by using a PDCCH resource, a UE according to a base station indication according to an embodiment of the present invention. detailed description
  • the base station and the UE combine the component carrier set configured for the UE and the CA capability information of the UE to determine each component carrier in the component carrier set.
  • the number of candidate PDCCHs in each CCE aggregation level in the corresponding PDCCH search space so that the base station can send signaling to the UE on the determined candidate PDCCH, and the UE can perform blind detection on the determined candidate PDCCH. Signaling delivered by the base station.
  • the base station includes a first communication unit 40, a processing unit 41, and a second communication unit 42, wherein
  • the first communication unit 40 is configured to receive CA aggregation capability information reported by the UE;
  • the processing unit 41 is configured to determine a component carrier set configured for the UE, and only the component carrier set configured for the UE and the CA capability information of the UE, and determine a PDCCH corresponding to each component carrier in the component carrier set configured for the UE, respectively.
  • the number of candidate PDCCHs in the CCE aggregation level in the search space is such that the total number of PDCCH blind detections in the PDCCH search space corresponding to the component carriers does not exceed the maximum number of PDCCH blind detections supported by the UE.
  • the second communication unit 42 is configured to select at least one candidate PDCCH in the determined candidate PDCCH to send downlink control information to the UE.
  • the processing unit 41 determines, when the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers in the component carrier set configured by the UE, according to the configuration for the UE Confirming the PDCCH search space configuration related parameter corresponding to the any one of the component carriers, and confirming the one of the component carriers according to the mapping relationship established in the existing standard protocol, and the carrier aggregation capability information of the UE
  • the number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space, and the product of the PDCCH search space correlation configuration parameter and the number of initial candidate PDCCHs in each CCE aggregation level are respectively calculated, and the calculation result is taken as The number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers.
  • the processing unit 41 determines, according to the component carrier set configured by the UE and the carrier aggregation capability information of the UE, the PDCCH search space configuration related parameter corresponding to the any one of the component carriers, The number of component carriers in the component carrier set configured by the UE, and determining the number of component carriers supported by the UE characterized by the carrier aggregation capability information of the UE, and using a preset operation rule, based on the component carrier The number and the number of component carriers supported by the UE are calculated, and the PDCCH search space configuration related parameter corresponding to the any one of the component carriers is calculated.
  • the processing unit 41 calculates a PDCCH search space configuration related parameter corresponding to the any one of the component carriers, based on the number of the component carriers and the number of component carriers that the UE supports to aggregate, using a preset operation rule. N_
  • the following parameters are used to calculate the PDCCH search space configuration related parameters by using the operation rule M:
  • the component carriers corresponding to the component carrier set configured for the UE are corresponding.
  • the initial value of the PDCCH search space configuration related parameter is set to M. If the value of the M is not an integer, the PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE is first taken.
  • the value is set to the rounding value of M, and then the remainder of the M is allocated to the corresponding component carrier according to the preset granularity according to the specified allocation priority, so as to correspond to the PDCCH search space corresponding to the corresponding component carrier.
  • the initial value of the configuration related parameter is adjusted to the final value, where the primary component carrier has the highest allocation preference;
  • the M is the number of the component carriers in the set of component carriers configured for the UE, and N is the number of component carriers that the UE supports to aggregate according to the carrier aggregation capability information reported by the UE.
  • the second communication unit 42 before transmitting the downlink control information to the UE, the second communication unit 42 further sends the PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE to the Said UE, or the communication unit and the UE agree to use the same operation rule to calculate a PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE.
  • the UE includes a first communication unit 50, a control unit 51, and a second communication unit 52, where
  • the first communication unit 50 is configured to receive component carrier set information sent by the network side.
  • the control unit 51 is configured to determine, according to the component carrier set information and the local CA capability, the candidate PDCCH in the CCE aggregation level of each control channel element in the PDCCH search space corresponding to each component carrier in the corresponding component carrier set, respectively.
  • the number of PDCCH blind detections in the PDCCH search space corresponding to each component carrier does not exceed the maximum number of PDCCH blind detections supported locally;
  • the second communication unit 52 is configured to perform a blind check on the determined candidate PDCCH to obtain downlink control information sent by the network side.
  • control unit 51 based on the component carrier set information and the local carrier aggregation capability, confirms the candidate PDCCH in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers in the corresponding component carrier set. Confirming the PDCCH search space configuration related parameters corresponding to the any one of the component carriers based on the set of the component carriers and the local carrier aggregation capability, and confirming the any one based on the mapping relationship established in the existing standard protocol.
  • control unit 51 determines, according to the component carrier set and the local carrier aggregation capability, the PDCCH search space configuration related parameter corresponding to the any one of the component carriers, and determines the target according to the high layer signaling sent by the network side.
  • a PDCCH search space configuration related parameter set by any one of the component carriers where the PDCCH search space configuration related parameter is calculated by the network side based on the component carrier set and the local carrier aggregation capability; or, determining the component carrier set
  • the number of component carriers is determined by the local carrier aggregation capability, and the number of component carriers supported by the local support aggregation is calculated by using the operation rule agreed with the network side, and the arbitrary number is calculated based on the number of the component carriers and the number of component carriers that are locally supported for aggregation.
  • control unit 51 calculates the PDCCH search space corresponding to the any one of the component carriers based on the number of the component carriers and the number of component carriers that are locally supported by the aggregation.
  • the PDCCH search space configuration related parameters are obtained by using the operation rule M as follows:
  • the component carriers corresponding to the component carrier set configured for the UE are corresponding.
  • the initial value of the PDCCH search space configuration related parameter is set to M. If the value of the M is not an integer, the PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE is first taken.
  • the value is set to the rounding value of M, and then the remainder of the M is allocated to the corresponding component carrier according to the preset granularity according to the specified allocation priority, so as to correspond to the PDCCH search space corresponding to the corresponding component carrier.
  • the initial value of the configuration related parameter is adjusted to the final value, where the primary component carrier has the highest allocation preference;
  • the M is the number of the component carriers in the set of component carriers configured for the UE
  • N is the number of component carriers that the UE supports to aggregate according to the carrier aggregation capability information reported by the UE.
  • Step 600 The base station receives the CA capability information reported by the UE.
  • the CA capability information reported by the UE indicates the maximum number of PDCCH blind detections supported by the UE
  • K is the capability of the UE to aggregate upstream, that is, the number of uplink carriers that can be aggregated.
  • the number of candidate PDCCHs corresponding to the CCE aggregation level is [1, 2, 4, 8] [6, 6, 2, 2];
  • the two DCI formats need to be blindly checked on all candidate PDCCHs, so the maximum number of PDCCH blind detections supported by the UE is:
  • the total number of blind detections (ie, the maximum number of PDCCH blinds that the UE can support): 12+32*N;
  • the DCI format 4 for UL-MIMO transmission needs to be additionally blinded in the search space corresponding to the PUSCH CC of the uplink. Therefore, the maximum number of PDCCH blind detections supported by the UE is:
  • the total number of blind detections (ie, the maximum number of PDCCH blinds that the UE can support): 12+32*N+16*K;
  • Step 610 The base station determines a component carrier set configured for the UE; for example, the base station determines a PDSCH/PUSCH CC set locally configured for the UE.
  • the base station also needs to notify the UE of the configuration information of the foregoing PDSCH/PUSCH CC set, so that the UE can also determine the PDCCH resource obtained by itself according to the information.
  • Step 620 The base station determines, according to the component carrier set configured for the UE and the CA capability information of the UE, the candidate PDCCH in each CCE aggregation level in the PDCCH search space corresponding to each component carrier in the component carrier set configured for the UE.
  • the number of PDCCH blind detections in the PDCCH search space corresponding to the component carriers does not exceed the maximum number of PDCCH blind detections that the UE can support.
  • step 620 when the base station determines, according to the component carrier set configured for the UE and the CA capability information of the UE, the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers in the component carrier set.
  • the PDCCH search space configuration related parameter corresponding to any one of the component carriers is confirmed according to the component carrier set configured for the UE and the CA capability information of the UE; and then, based on an existing standard protocol (such as 9.1 of 3GPP TS 36.213).
  • the UE corresponds to each component carrier.
  • Total number of PDCCH blind detections in the PDCCH search space total number of PDCCH blind detections of the UE in the common search space +
  • the total number of PDCCH blind detections of the UE in the dedicated space UE Number of DCI formats that need to be blindly checked (usually 2) * (each of the PDCCH search spaces corresponding to carrier 1)
  • M is the number of component carriers in the PDSCH/PUSCH CC set, which can be determined in the following manner: Assume that the number of component carriers in the PDSCH CC set is P, and the number of component carriers in the PUSCH CC set is Q, in Q There are Q1 PUSCH CCs in the PUSCH CC and PDSCH CCs in the PDSCH CC set are not fixed.
  • the value of the parameters related to the PDCCH search space configuration corresponding to each carrier may be the same or different.
  • the former case is introduced as an example.
  • the specific recording method is as follows:
  • CA capability information reported by the UE indicates that the UE supports aggregation of N component carriers
  • the number of carriers included in the PDSCH/PUSCH CC set is M, M ⁇ N, and the PDCCH search space is configured with related parameters.
  • the number of candidate PDCCHs corresponding to the CCE aggregation level [1, 2, 4, 8] in the search space is Mi*[6,6,2,2], ie [Mi*6, Mi*6, Mi*2, Mi *2];
  • the total number of actual PDCCH blind detections of the UE 12+2* ( Ml * ( 6+6+2+2 ) + Mi* ( 6+6+2+2 ) + MM*
  • the base station when performing step 620, the base station confirms the PDCCH search space configuration corresponding to any one of the component carriers according to the foregoing PDSCH/PUSCH CC set and the CA capability information of the UE.
  • the base station correlates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC.
  • the value of the parameter is set to M, so that the value of Mi corresponding to any PDSCH/PUSCH CC is the same.
  • the base station When the value of M is not an integer, the base station first sets the initial value of the PDCCH search space configuration related parameter corresponding to each PDSCH/PUSCH CC to of The remainder is allocated to the corresponding PDSCH/PUSCH CC according to a preset allocation unit (also referred to as granularity), so as to further adjust the initial values of the PDCCH search space configuration related parameters corresponding to the respective PDSCH/PUSCH CCs, and obtain The PDCCH search space configuration related parameter final value, where the primary CC has the highest allocation priority; for example, the base station first correlates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC
  • a preset allocation unit also referred to as granularity
  • the initial value of the parameter is set to M. Then, the remainder of M is preferentially assigned to the Primary CC with a granularity of 1. If there is any remaining, the remaining value is 1 granularity, based on the carrier of other PDSCH/PUSCH CC.
  • the numbering sequence (indicated by CIF (carrier indicator field), which can be from size to size, or from small to large) is allocated to the corresponding PDSCH/PUSCH CC to correlate the PDCCH search space corresponding to each PDSCH/PUSCH CC.
  • the initial value of the configuration parameter is adjusted to the final value.
  • the final value of the PDCCH search space-related configuration parameter corresponding to any one of the PDSCH/PUSCH CCs can be obtained according to whether it is a Primary CC or according to its carrier number.
  • Step 630 The base station selects at least one candidate PDCCH in the determined candidate PDCCH to send the DCI to the UE.
  • the base station may use the high layer signaling (eg, RRC signaling) to search the PDCCH corresponding to each component carrier.
  • the spatial configuration related parameter is notified to the UE, and after the PDSCH/PUSCH CC set is notified to the UE, the UE uses the same operation rule as the base station to calculate the PDCCH search space configuration corresponding to each component carrier in the PDSCH/PUSCH CC set.
  • the base station may use the high layer signaling (eg, RRC signaling) to search the PDCCH corresponding to each component carrier.
  • the spatial configuration related parameter is notified to the UE, and after the PDSCH/PUSCH CC set is notified to the UE, the UE uses the same operation rule as the base station to calculate the PDCCH search space configuration corresponding to each component carrier in the PDSCH/PUSCH CC set.
  • the base station may directly notify the UE of the number of candidate PDCCHs in each aggregation level corresponding to each component carrier in the final determined PDSCH/PUSCH CC set by using the high layer signaling, and details are not described herein again.
  • the detailed process of configuring and applying the PDCCH resource by the UE according to the indication of the base station is as follows:
  • Step 700 The UE receives the component carrier set information sent by the network side. For example, the UE determines that the base station is a PDSCH/PUSCH CC set configured by the UE.
  • Step 710 The UE determines, according to the obtained component carrier set information and the local CA capability, the candidate PDCCH in the CCE aggregation level of each control channel element in the PDCCH search space corresponding to each component carrier in the corresponding component carrier set.
  • the number of PDCCH blind detections in the PDCCH search space corresponding to each component carrier does not exceed the maximum number of PDCCH blind detections supported locally.
  • the UE when the UE is based on the obtained component carrier set information and the local CA capability, When the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers is determined in the corresponding component carrier set, first, any one of the above members is confirmed according to the component carrier set and the local CA capability.
  • the PDCCH search space-related configuration parameter corresponding to the carrier and then, based on the mapping relationship defined in the existing standard protocol, the number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers is confirmed; And calculating a product of the PDCCH search space configuration related parameter and the number of initial candidate PDCCHs in each CCE aggregation level, and using the calculation result as a candidate in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers.
  • the number of PDCCHs is the mapping relationship defined in the existing standard protocol
  • the value of the parameters related to the PDCCH search space configuration corresponding to each carrier may be the same or different.
  • the former case is introduced as an example.
  • the recording method is the same as that of the base station, as follows:
  • the UE when the UE confirms the PDCCH search space configuration related parameter corresponding to any one of the component carriers based on the obtained PDSCH/PUSCH CC set and the local CA capability, the UE may perform the indication sent by the base station through the high layer signaling.
  • the UE may also first Determining the number M of component carriers in the obtained PDSCH/PUSCH CC set, and determining the number of component carriers N of the local support aggregation characterized by the local CA capability, and then using the operation rule agreed with the base station, based on the number of learned component carriers M and the number of component carriers N that are supported by the local aggregation, and the PDCCH search space configuration related parameter (ie, Mi) corresponding to any one of the component carriers is calculated.
  • the UE associates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC.
  • the value of the parameter is set to M, so that the value of Mi corresponding to any PDSCH/PUSCH CC is the same.
  • the UE When the value of M is not an integer, the UE first configures the PDCCH search space corresponding to each PDSCH/PUSCH CC. The remaining number is allocated to the corresponding PDSCH/PUSCH CC according to a preset allocation unit (also referred to as granularity), thereby further adjusting the initial values of the PDCCH search space configuration related parameters corresponding to the respective PDSCH/PUSCH CCs, Obtaining a final value of the PDCCH search space configuration related parameter, where the primary CC has the highest allocation priority; for example, the base station first correlates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC
  • the initial value of the parameter is set to M. Then, the remainder of M is preferentially assigned to the Primary CC with a granularity of 1. If there is any remaining, the remaining value is 1 granularity, based on the carrier of other PDSCH/PUSCH CC.
  • the numbering sequence (indicated by CIF (carrier indicator field), which can be from size to size, or from small to large) is allocated to the corresponding PDSCH/PUSCH CC to correlate the PDCCH search space corresponding to each PDSCH/PUSCH CC.
  • the initial value of the configuration parameter is adjusted to the final value.
  • the final value of the PDCCH search space-related configuration parameter corresponding to any one of the PDSCH/PUSCH CCs can be obtained according to whether it is a Primary CC or according to its carrier number.
  • Step 720 The UE performs blind detection on the determined candidate PDCCH to obtain the DCI sent by the network side.
  • the number of candidate PDCCHs corresponding to the CCE aggregation level [1, 2, 4, 8] in the PDCCH search space corresponding to each PDSCH/PUSCH CC is [ 6,6,2,2]
  • the base station And the UE can determine that the number of candidate PDCCHs corresponding to the CCE aggregation level [1, 2, 4, 8] of the UE in the PDCCH search space corresponding to the PDSCH/PUSCH CC 1 can be 2*[6, 6, 2, respectively.
  • the number of candidate PDCCHs corresponding to the CCE aggregation level [1, 2, 4, 8] in the PDCCH search space corresponding to the PDSCH/PUSCH CC 2 may be 2*, respectively.
  • [6,6,2,2] [12, 12,4,4]
  • the number of candidate PDCCH e corresponding to the CCE aggregation level [1, 2, 4, 8] in the PDCCH search space corresponding to each PDSCH/PUSCH CC is [6,6,2,2]
  • the PDSCH/PUSCH CC1 is a Primary CC
  • both the base station and the UE can determine that if the PDSCH/PUSCH CC1 is a Primary CC, then the CCE aggregation level in the PDCCH search space corresponding to the PDSCH/PUSCH CC 1 is [1, 2, 4, 8]
  • the base station and the UE are combined with the component carrier set configured for the UE and the CA capability information of the UE to determine the component carrier set, and each member carrier corresponds to In the PDCCH search space, the number of candidate PDCCHs in each CCE aggregation level, so that the base station can send DCI to the UE on the determined candidate PDCCH, and the UE can perform blind detection on the determined candidate PDCCH to obtain the base station.
  • the DCI of the PDCCH can be greatly improved, and the total number of PDCCH blind detections that the UE actually performs can be greatly improved, thereby preventing the PDCCH from being blocked and improving the system performance, and the total number of PDCCH blind detections actually performed by the UE is not exceeded.
  • the maximum number of PDCCH blind detections supported by the UE is not exceeded.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the present invention can be applied to one or more computers in which computer usable program code is included. A form of computer program product embodied on a storage medium (including but not limited to disk storage and optical storage, etc.).
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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

Abstract

La présente demande concerne le domaine des communications. Un procédé et un dispositif d'attribution de ressources PDCCH sont décrits pour réduire la probabilité de blocage de PDCCH dans un système. Le procédé comprend les opérations suivantes : en fonction de l'ensemble de porteuses membres attribué à un UE et aux informations de capacité d'agrégation de porteuses (CA) de l'UE, une station de base et l'UE déterminent le nombre de PDCCH candidats sous chaque niveau d'agrégation de CCE dans l'espace de recherche de PDCCH correspondant à chaque porteuse membre dans l'ensemble de porteuses membres ; la station de base envoie des DCI à l'UE sur les PDCCH candidats déterminés ; et l'UE effectue une détection aveugle sur les PDCCH candidats déterminés afin d'obtenir les DCI envoyés par la station de base. La présente invention non seulement augmente fortement le nombre total de détections aveugles de PDCCH réellement exécutées par l'UE dans la plage de capacité admissible de l'UE, mais en outre assure que le nombre total de détections aveugles de PDCCH réellement exécutées par l'UE ne dépasse pas le nombre maximal de détections aveugles de PDCCH pris en charge par l'UE, ce qui évite un blocage de PDCCH et améliore les performances du système.
PCT/CN2012/080736 2011-11-10 2012-08-29 Procédé et dispositif d'attribution de ressources pdcch Ceased WO2013067839A1 (fr)

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