WO2013067839A1

WO2013067839A1 - Pdcch resource allocation method and device

Info

Publication number: WO2013067839A1
Application number: PCT/CN2012/080736
Authority: WO
Inventors: 赵锐; 沈祖康; 潘学明
Original assignee: 电信科学技术研究院
Priority date: 2011-11-10
Filing date: 2012-08-29
Publication date: 2013-05-16
Also published as: CN102368871B; CN102368871A

Abstract

The present application relates to the field of communications. Disclosed are a PDCCH resource allocation method and device, for reducing the probability of the PDCCH blocking in a system. The method comprises: according to the member carrier set allocated for a UE and the carrier aggregation (CA) capability information of the UE, both a base station and the UE determine the number of PDCCH candidates under every CCE aggregation level in the PDCCH search space corresponding to each member carrier in the member carrier set; the base station transmits DCI to the UE on the determined PDCCH candidates; and the UE conducts a blind detection on the determined PDCCH candidates to obtain the DCI transmitted by the base station. The present invention not only greatly improves the total number of times of the PDCCH blind detection actually executed by the UE within the allowable capability range of the UE, but also ensures that the total number of times of the PDCCH blind detection actually executed by the UE does not exceed the maximum times of PDCCH blind detection supported by the UE, thus avoiding PDCCH blocking and improving system performance.

Description

The present invention claims the Chinese patent application filed on November 10, 2011 by the Chinese Patent Office, the application number is 201110355997.9, and the invention name is "a PDCCH resource configuration application method and device" Priority is hereby incorporated by reference in its entirety. Technical field

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

In the Long Term Evolution (LTE) version (Release, Rel) 8 system, the terminal needs a physical downlink control channel in a common search space and a user equipment (User Equipment, UE)-specific search space. , PDCCH) Simultaneous blind detection. The control channel element (CCE) aggregation level of the PDCCH can only be 4 and 8 in the common search space. Correspondingly, under each CCE aggregation level, the number of candidate PDCCHs that need to be blindly detected is 4 and respectively. 2; In the UE-specific search space, 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)

PDCCH) As shown in Table 1, corresponding to the four CCE aggregation levels of [1, 2, 4, 8], 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. Generally, each number corresponds to one transmission mode. For each transmission mode, two downlink control information (Downlink Control Information, DCI) needs to be blindly detected. ) format, from this, it can be seen that the number of times the terminal in LTE needs blind detection is: 2*[6+6+2+2+4+2]=44 times. The definition of the UE-specific search space is as shown in the following formula: = · {1⁄2 + ) D D _CCE , / 』+ ' Y. ^AY^m dD γ-ι = "RNTI≠ ⁰ , = 39827, > = 65537 where is shown in sub-frame k, when the aggregation level is L The location of the PDCCH resource used by the UE, that is, the location of all CCEs included in the PDCCH, Ζ = 0,···, — 1 , = 0,···,Μ ^(Ζ °— 1. (“ indicates that the aggregation level is L The number of candidate PDCCHs at the time indicates the number of CCEs in the subframe k.

Referring to FIG. 1, for an enhanced LTE (LTE-Advanced, LTE-A) system, in order to support a wider system bandwidth (for example, 100 MHz) than an LTE system, it is required to pass multiple LTE carriers (also called members). The resources of the carrier are connected and used in two ways:

Aggregating multiple consecutive LTE carriers provides greater transmission bandwidth for LTE-A.

Aggregating multiple non-contiguous LTE carriers provides greater transmission bandwidth for LTE-A.

Referring to Figure 2A, Figure 2B and Figure 3, 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.

In the LTE-A system (ie, LTE Rel-10), 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.

In the case of cross-carrier scheduling described in Mode 2, considering the complexity of PDCCH design, scheduling flexibility,

The complexity of PDCCH blind detection, and the impact of uplink and downlink asymmetric carrier aggregation, setting the physical downlink control channel component carrier (PDCCH CO and physical downlink shared channel and/or physical uplink shared channel component carrier (PDSCH/PUSCH) 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:

The placement of 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:

C

+ i

Y _k =(AY _k _,) modD

Υ. _λ = « _RN Ti≠ 0 ^ = 39827 D = 65537 Where ^k ' ⁿ denotes a PDCCH search space with a CCE aggregation level of L for the PDSCH/PUSCH CC _n in the subframe K, " = 1, ² , · · ·, ( - 1) , where Ν is the aggregated component carrier The number of candidate PDCCHs when the aggregation level is L, where = 0, " , , M ⁽ ) - 1 , = 0, · · · , - 1 , represents the kth subframe The number of CCEs.

Meanwhile, when the search space between different CCs is inside one PDCCH CC, if the bits in the DCI format are the same, different CCs can also share the search space inside the PDCCH CC.

Generally, 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:

It is assumed that 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. In Rel-10, 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). 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:

If the UE does not support uplink multi-user input and output (UL-MIMO), then two DCI formats need to be blindly checked on all candidate PDCCH candidates, so the maximum number of blind detections supported is:

Public search space: 2* ( 4+2 ) =12;

UE-specific search space: N*2* (6+6+2+2);

Total number of blind inspections: 12+32*N;

If the UE supports UL-MIMO, an additional blind check DCI format4 for UL-MIMO transmission is required in the search space corresponding to the PUSCH CC of the uplink. Therefore, the maximum number of blind detections supported by the UE is:

Public search space: 2* ( 4+2 ) =12;

UE-specific search space: N*2* (6+6+2+2) +k* (6+6+2+2);

Total number of blind inspections: 12+32*N+16*K;

In a PDSCH/PUSCH CC (ie, a component carrier used for transmitting a PDSCH/PUSCH) that is aggregated by a UE, 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:

Only the Primary CC is configured with a Physical Uplink Control Channel (PUCCH) for transmitting a Channel Quality Indicator (CQI)/Acknowledged (ACK)/Schedule Request (SR); 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;

Only the primary access channel can transmit a random access channel (RACH);

Only semi-persistent scheduling (SPS) resources can be configured on the Primary CC;

The RLF is considered to occur on the terminal only if the radio link failure (RLF) occurs on the Primary CC. It can be seen that, in the PDCCH search space defined in the LTE-A system, regardless of the CA aggregation capability of the UE, the size of the PDCCH search space agreed by the UE and the network side is always related to the CC included in the PDSCH/PUSCH CC set. The maximum number of blind detections that the UE can support is not fully utilized. With the development of the smart terminal technology, the blind detection capability of the UE is increasingly enhanced. If the PDCCH search space is configured for the UE in the conventional manner, the UE capability and the PDCCH resources are caused. If the number of UEs is large, the PDCCH search space is configured in the traditional manner, which causes PDCCH blocking and reduces system throughput, thus affecting system performance. Summary of the invention

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.

The specific technical solutions provided by the embodiments of the present invention are as follows:

A method for configuring a PDCCH resource, including:

Receiving carrier aggregation capability information reported by the terminal UE;

Determining a set of component carriers configured for the UE;

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;

Selecting at least one candidate PDCCH among the determined candidate PDCCHs transmits downlink control information to the UE. A method for configuring a PDCCH resource, including:

Receiving component carrier set information sent by the network side;

Determining, according to the component carrier set information and the local carrier aggregation capability, the number of candidate PDCCHs 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 total number of PDCCH blind detections in the PDCCH search space corresponding to each component carrier does not exceed the maximum number of locally supported PDCCH blind detections;

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 In the PDCCH search space corresponding to each component carrier, 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. Maximum number of PDCCH blind detections;

And 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;

a 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;

And 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.

In the embodiment of the present invention, 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. The number of blind checks. DRAWINGS

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;

3 is a schematic diagram of a relationship between a PDCCH CC and a PDSCH/PUSCH CC in the prior art;

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;

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

In order to effectively reduce the PDCCH blocking probability in the system and improve the system performance, in the embodiment of the present invention, 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.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to FIG. 4, in the embodiment of the present invention, 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.

Further, 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.

Further, 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.

Further, 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:

N_

If the value of M is an integer, the component carriers corresponding to the component carrier set configured for the UE are corresponding.

N_ N_

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.

N_ N_

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. Further, 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.

As shown in FIG. 5, in the embodiment of the present invention, 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.

Further, the 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. The number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the component carrier, and the product of calculating the PDCCH search space configuration related parameter and the number of initial candidate PDCCHs in each CCE aggregation level, respectively, The result of the calculation The number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to one component carrier.

Further, the 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. A PDCCH search space configuration related parameter corresponding to one component carrier.

Further, the 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.

N_

When the relevant parameters are set, the PDCCH search space configuration related parameters are obtained by using the operation rule M as follows:

N_

N_ N_

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. Based on the foregoing technical solution, as shown in FIG. 6, in the embodiment of the present invention, the detailed process of the base station configuring and applying the PDCCH resource (ie, the PDCCH search space) for the UE is as follows:

Step 600: The base station receives the CA capability information reported by the UE.

In this embodiment, the CA capability information reported by the UE indicates the maximum number of PDCCH blind detections supported by the UE, and the CA capability information may be defined as N=max (L, K) component carriers, where L is the downlink aggregation capability of the UE, that is, The number of downlink carriers that can be aggregated. K is the capability of the UE to aggregate upstream, that is, the number of uplink carriers that can be aggregated. Specifically:

In the PDCCH search space corresponding to each CC of the aggregation, the number of candidate PDCCHs corresponding to the CCE aggregation level is [1, 2, 4, 8] [6, 6, 2, 2];

If the UE does not support UL-MIMO, 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:

Public search space: 2* ( 4 + 2 ) =12;

UE-specific search space: N*2* (6+6+2+2);

The total number of blind detections (ie, the maximum number of PDCCH blinds that the UE can support): 12+32*N;

If the UE supports UL-MIMO, 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:

Public search space: 2* ( 4 + 2 ) =12;

UE-specific search space: N*2* (6+6+2+2) +k* (6+6+2+2);

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.

In a practical application, 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.

In 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. First, 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). 1) The mapping relationship determined in the above, confirming the number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers; and finally, calculating the PDCCH search space configuration related parameters and each CCE aggregation separately The product of the number of initial candidate PDCCHs in the level, and the calculation result is used as the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to any one of the component carriers.

Therefore, it can be inferred that, in the set of component carriers configured for the UE, 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, where 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)

The sum of the number of candidate PDCCHs in the CCE aggregation level * PDCCH search space configuration related parameter 1 + the sum of the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to carrier 2 * PDCCH search space configuration related parameter 2 + . The sum of the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the carrier M * PDCCH search space configuration related parameter M ).

Where 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 relationship between SIB2. Then M = P + Q 1 member carrier.

The value of the parameters related to the PDCCH search space configuration corresponding to each carrier may be the same or different. In this embodiment, the former case is introduced as an example. The specific recording method is as follows:

Assume that the 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.

M

The number is denoted by Mi, i=l, 2, ..., Μ ^ι ^≤ Μ , ^{≤ Ν} , and '; then any one of the component carriers in the PDSCH/PUSCH CC set, that is, the PDCCH corresponding to the i-th PDSCH/PUSCH CC 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]; Then, the total number of actual PDCCH blind detections of the UE = 12+2* ( Ml * ( 6+6+2+2 ) + Mi* ( 6+6+2+2 ) + MM*

(6+6+2+2) =12+32*(M1+ Mi + MM).

On the other hand, in this embodiment, 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.

N_

When the relevant parameter (ie Mi) is used, there are various calculation rules that can be used, for example, M , where

N_

When M is an integer, the base station correlates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC.

N_

The value of the parameter is set to M, so that the value of Mi corresponding to any PDSCH/PUSCH CC is the same.

N_

, that is, Mi= M;

N_

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

N N_

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. Thus, 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.

N

Yes, ie Mi= ^M ” + Ai. On the other hand, in the above embodiment, the CCE starting position of the PDCCH search space under each CCE aggregation level of the UE follows the existing definition.

Step 630: The base station selects at least one candidate PDCCH in the determined candidate PDCCH to send the DCI to the UE. In the foregoing embodiment, after determining the PDCCH search space configuration related parameters 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. Related parameters.

Of course, 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.

Corresponding to the foregoing embodiment, referring to FIG. 7, in the embodiment of the present invention, 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.

During the performing step 710, 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.

The value of the parameters related to the PDCCH search space configuration corresponding to each carrier may be the same or different. In this embodiment, the former case is introduced as an example. The recording method is the same as that of the base station, as follows:

It is assumed that the UE's CA capability indicates that the UE supports aggregation of N component carriers. Meanwhile, it is assumed that the number of carriers included in the PDSCH/PUSCH CC set is M, M≤N, and the PDCCH search space configuration related parameters are recorded as Mi, i=l, 2 ,...,M

M

^{1 Μ Μ} '' ^≤ W , and ' = ι '; then any one of the component carriers in the PDSCH/PUSCH CC set, that is, the CCE aggregation level in the PDCCH search space corresponding to the i-th PDSCH/PUSCH CC [1, 2, 4 , 8] the corresponding number of candidate PDCCHs is Mi*[6,6,2,2], ie [Mi*6, Mi*6, Mi*2, Mi*2]; then, the actual PDCCH blind detection of the UE Total number of times = 12+2* ( Ml* ( 6+6+2+2 ) + Mi* ( 6+6+2+2 ) + MM* ( 6+6+2+2 )

=12+32*(M1+ Mi + MM).

In the above embodiment, 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. Determining a PDCCH search space configuration related parameter that is set for any one of the foregoing component carriers, where the PDCCH search space configuration related parameter is calculated by the base station based on the PDSCH/PUSCH CC set delivered to the UE and the CA capability of the UE; or, 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 calculation rule that the UE can use when calculating the PDCCH search space-related configuration parameter corresponding to the i-th PDSCH/PUSCH

N_

There are many, for example, ^Μ , where,

N_

When M is an integer, the UE associates the PDCCH search space configuration corresponding to each PDSCH/PUSCH CC. N_

N_

, that is, Mi=M;

N_

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

N N_

N

Yes, ie Mi= ^M ” + Ai. Step 720: The UE performs blind detection on the determined candidate PDCCH to obtain the DCI sent by the network side.

The implementation effects of the foregoing embodiments are specifically described below through three practical application scenarios.

Scenario 1 : Assume that the CA capability of the UE is to support aggregation of two carriers, that is, N = 2, and the PDSCH/PUSCH CC set configured by the base station for the UE includes the number of component carriers, that is, M = 1. Then, in the definition of the original Rel-10-based search space, the number of candidate PDCCHs corresponding to the CCE aggregation level [1, 2, 4, 8] is [6, 6, 2, 2], respectively, and the UE actually performs The total number of PDCCH blind detections is 12+2*[6+6+2+2]=44. With the PDCCH resource enhancement configuration method given in the foregoing embodiment, both the base station and the UE can determine that the CCE is in the PDCCH search space. The number of candidate PDCCHs corresponding to the aggregation level [1, 2, 4, 8] may be 2*[6,6,2,2]=[12,12,4,4], respectively, and the UE performs in the exclusive PDCCH search space. The total number of PDCCH blind detections is 2*[12+12+4+4]=64, and the total number of PDCCH blind detections actually performed by the UE is 12+64=76.

Scenario 2: It is assumed that the CA capability reported by the UE is to support aggregation of 4 carriers, that is, N=4, and the base station configures for the UE. The number of component carriers included in the PDSCH/PUSCH CC set is 2, that is, M = 2. Then, in the definition of the original Rel-10-based search space, 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 total number of PDCCH blind detections actually performed by the UE is 12+2*[6+6+2+2]=44; 釆 using the PDCCH resource increase configuration method given in the foregoing embodiment, 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. , 2]=[12, 12,4,4], 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 total number of PDCCH blind detection performed by the UE in the exclusive PDCCH search space is: 2*[12+12+4+4]+ 2 *[12+12+4+4]=128, , the total number of PDCCH blind checks actually performed by the UE is 12+128=140.

Scenario 3: It is assumed that the CA capability reported by the UE is to support aggregation of 4 carriers, that is, N=4, and the number of component carriers included in the PDSCH/PUSCH CC set configured by the base station for the UE is 3, that is, M=3. Then, in the definition of the original Rel-10-based search space, 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 total number of PDCCH blind detections actually performed by the UE is 12+2*[6+6+2+2]=44; 釆using the PDCCH resource increase configuration method given in the foregoing embodiment If 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 number of corresponding candidate PDCCHs may be 2*[6,6,2,2]=2*[12,12,4,4], and the CCE aggregation level in the PDCCH search space corresponding to PDSCH/PUSCH CC2 [ The number of candidate PDCCHs corresponding to 1, 2, 4, 8] may be 1*[6,6,2,2]=[6,6,2,2], respectively, in the PDCCH search space corresponding to PDSCH/PUSCH CC3 The number of candidate PDCCH candidates corresponding to the CCE aggregation level [1, 2, 4, 8] may be 1*[6,6,2,2]=[6,6,2,2] respectively, and the UE-specific PDCCH search space The total number of PDCCH blind checks performed within is 2* [12+12+4+4] + 2* [6+6+2+2] +2* [6+6+2+2]=128, , The total number of PDCCH blind checks actually performed by the UE is 12+128=140.

It can be seen that, by using the PDCCH resource enhancement configuration scheme that is set by the embodiment of the present invention, 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.

Those skilled in the art will appreciate that 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 present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each process and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

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.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

Rights request

A physical downlink control channel PDCCH resource configuration application method, comprising: receiving carrier aggregation capability information reported by a terminal UE;

Determining a set of component carriers configured for the UE;

Selecting at least one candidate PDCCH among the determined candidate PDCCHs transmits downlink control information to the UE.

The method according to claim 1, wherein 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 is determined. Includes:

And confirming, according to the component carrier set configured by the UE, and the carrier aggregation capability information of the UE, a PDCCH search space configuration related parameter corresponding to the any one of the component carriers;

Confirming the number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH exploration space corresponding to any one of the component carriers, based on the mapping relationship established in the existing standard protocol;

Calculating a product of the PDCCH search space-related configuration parameter and the number of initial candidate PDCCHs in each CCE aggregation level, respectively, and using the calculation result as the PDCCH search space corresponding to the any one of the component carriers, at each CCE aggregation level. The number of candidate PDCCHs.

The method of claim 2, wherein the PDCCH search space configuration related parameter corresponding to the any one of the component carriers is confirmed according to the component carrier set configured for the UE and the carrier aggregation capability information of the UE , including:

Determining a number of component carriers within a set of component carriers configured for the UE;

Determining, by using the carrier aggregation capability information reported by the UE, the number of component carriers that the UE supports to be aggregated; using a preset operation rule, calculating 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 Corresponding PDCCH search space configuration related parameters.

The method according to claim 3, wherein the PDCCH search space corresponding to the any one of the component carriers is calculated based on the number of the component carriers and the number of component carriers supported by the UE. Configure related parameters, including:

N_

The PDCCH search space configuration related parameters are obtained by using the operation rule M according to the following method:

N_

If the value of M is an integer, the component carriers corresponding to the component carrier set configured for the UE are corresponding. N_ N_

N_ N_

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 method according to claim 2, 3 or 4, further comprising: before transmitting the downlink control information to the UE, further comprising:

Transmitting, by the high layer signaling, a PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE to the UE, or calculating, by using the same operation rule, with the UE The PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE.

A PDCCH resource configuration application method, comprising:

Receiving component carrier set information sent by the network side;

The method according to claim 6, wherein, according to the component carrier set information and the local carrier aggregation capability, each of the PDCCH search spaces corresponding to any one of the component carriers in the corresponding component carrier set is confirmed. The number of candidate PDCCHs in the CCE aggregation level, including:

Confirming, according to the component carrier set and the local carrier aggregation capability, the corresponding one of the component carriers

PDCCH search space configuration related parameters;

Calculating the PDCCH search space configuration related parameters and initial candidates under each CCE aggregation level separately

The product of the number of PDCCHs is used as the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the any one of the component carriers.

8. The method of claim 7, wherein: based on the set of component carriers and a local carrier The PDCCH search space configuration related parameter that is set for the any one of the component carriers is determined according to the high layer signaling sent by the network side, and the PDCCH search is performed. The space configuration related parameter is calculated by the network side based on the set of component carriers and the local carrier aggregation capability;

Or,

Determining the number of component carriers in the set of component carriers, determining the number of component carriers that are locally supported by the local carrier aggregation capability, and using the operation rules agreed with the network side, based on the number of the component carriers and the members of the local support aggregation. The number of carriers is used to calculate a PDCCH search space configuration related parameter corresponding to the any one of the component carriers.

The method according to claim 8, wherein the operation rule agreed with the network side is used to calculate the corresponding one of the component carriers based on the number of the component carriers and the number of component carriers that are locally supported for aggregation.

PDCCH search space configuration related parameters, including:

N_

N_ N_

A PDCCH resource configuration application device, comprising:

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 In the PDCCH search space corresponding to each component carrier, 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. Maximum number of PDCCH blind detections;

The device according to claim 10, wherein the processing unit determines a candidate for each CCE aggregation level in a PDCCH search space corresponding to any one of the component carriers in the component carrier set configured by the UE. The PDCCH search space configuration related parameter corresponding to the any one of the component carriers is confirmed according to the component carrier set configured for the UE and the carrier aggregation capability information of the UE, and is determined based on an existing standard protocol. Mapping the relationship, confirming the number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the any one of the component carriers, and calculating the PDCCH search space related configuration parameters and each CCE aggregation level respectively. The product of the number of candidate PDCCHs, and the calculation result is used as the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the any one of the component carriers.

The device according to claim 11, wherein the processing unit confirms the PDCCH search corresponding to the any one of the component carriers according to the component carrier set configured for the UE and the carrier aggregation capability information of the UE. And determining, by the space configuration related parameter, the number of component carriers in the component carrier set configured for the UE, and determining the number of component carriers supported by the UE that is characterized by the carrier aggregation capability information reported by the UE, and using a preset operation The PDCCH search space configuration related parameter corresponding to the any one of the component carriers is calculated according to the number of the component carriers and the number of component carriers that the UE supports to aggregate.

The device according to claim 12, wherein the processing unit calculates the corresponding 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 according to a preset operation rule.

N_

When the PDCCH search space is configured with related parameters, the PDCCH search space configuration related parameters are obtained by using the operation rule M as follows:

N_

N_ N_

14. The apparatus according to claim 11, 12 or 13, wherein said second communication unit is in the UE Before transmitting the downlink control information, the PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured by the UE is sent to the UE by using the high layer signaling, or the communication unit and the UE It is agreed that the PDCCH search space configuration related parameter corresponding to each component carrier in the component carrier set configured for the UE is calculated by using the same operation rule.

A PDCCH resource configuration application device, comprising:

a first communication unit, configured to receive component carrier set information sent by the network side;

a control unit, configured to determine, according to the component carrier set information and the local carrier aggregation capability, candidates 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 PDCCHs is such that the total number of PDCCH blind detections in the PDCCH search space corresponding to each component carrier does not exceed the maximum number of locally supported PDCCH blind detections;

The second communication unit performs blind detection on the determined candidate PDCCH to obtain downlink control information sent by the network side.

The device according to claim 15, wherein the control unit confirms a PDCCH search space corresponding to any one of the component carriers in the corresponding component carrier set based on the component carrier set information and the local carrier aggregation capability. And determining the PDCCH search space configuration related parameter corresponding to the any one of the component carriers based on the component carrier set and the local carrier aggregation capability, and based on the existing standard protocol, when the number of the candidate PDCCHs in the CCE aggregation level is determined. And determining a number of initial candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the any one of the component carriers, and calculating the PDCCH search space configuration related parameters and each CCE aggregation level respectively. A product of the number of initial candidate PDCCHs, and the calculation result is used as the number of candidate PDCCHs in each CCE aggregation level in the PDCCH search space corresponding to the any one of the component carriers.

The device according to claim 16, wherein the control unit determines the PDCCH search space configuration related parameter corresponding to the any one of the component carriers based on the component carrier set and the local carrier aggregation capability, according to The high layer signaling sent by the network side determines a PDCCH search space configuration related parameter that is set for the 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 number of component carriers in the set of component carriers, determining the number of component carriers of the local support aggregation characterized by the local carrier aggregation capability, using an operation rule agreed with the network side, based on the number of the component carriers and the local Supporting the number of component carriers to be aggregated, and calculating PDCCH search space configuration related parameters corresponding to the any one of the component carriers.

The device according to claim 17, wherein the control unit calculates the arbitrary one member based on the number of the component carriers and the number of component carriers that are locally supported for aggregation, using an operation rule agreed with the network side.

N_

When the relevant parameters of the PDCCH search space corresponding to the carrier are configured, the operation rule M is used to calculate and obtain the method according to the following method. PDCCH search space configuration related parameters:

N_

N_ N_