WO2019192542A1

WO2019192542A1 - Method and device for mapping physical downlink control channel

Info

Publication number: WO2019192542A1
Application number: PCT/CN2019/081335
Authority: WO
Inventors: 张晨晨; 郝鹏
Original assignee: 中兴通讯股份有限公司
Priority date: 2018-04-04
Filing date: 2019-04-03
Publication date: 2019-10-10
Also published as: CN110351041A; CN110351041B

Abstract

Provided are a method and device for mapping a physical downlink control channel. The method comprises: a second communication node reserves at least one physical downlink control channel candidate from multiple physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate in the multiple physical downlink control channel candidates, wherein the physical downlink control channel candidate that is not reserved or is deleted meets a preset condition, or the physical downlink control channel candidate that is reserved or is not deleted meets other preset conditions; the second communication node maps a physical downlink control channel on the physical downlink control channel candidate that is reserved or is not deleted.

Description

Method and device for mapping physical downlink control channel

The present application claims the priority of the Chinese Patent Application, No. PCT Application No

Technical field

The present disclosure relates to the field of communications, for example, to a method and apparatus for mapping a physical downlink control channel.

Background technique

In the Long Term Evolution (LTE) and the New Radio Access Technology (New RAT, NR), the downlink control information is carried by a Physical Downlink Control Channel (PDCCH), and usually In this case, the base station selects one PDCCH candidate among the plurality of PDCCH candidates as the final PDCCH channel. The terminal does not know which PDCCH candidate (which may also be referred to as a candidate PDCCH) that the base station selects among the plurality of PDCCH candidates as the final PDCCH channel. Therefore, the terminal needs to try PDCCH demodulation and decoding one by one among a plurality of PDCCH candidates until the PDCCH channel can be successfully found.

For the foregoing multiple PDCCH candidates, they are usually distributed over multiple aggregation levels, and each aggregation level usually includes multiple PDCCH candidates. The aggregation level refers to the number of Control Channel Elements (CCEs) included in one PDCCH candidate. For example, if the aggregation level is 4, then each PDCCH candidate on the aggregation level consists of 4 CCEs.

It can be seen that the more the number of PDCCH candidates, the more the number of PDCCH candidates that the terminal needs to detect blindly, and therefore, the more the number of CCEs that need channel estimation.

In the new generation wireless communication technology, the terminal still reads the control signaling sent in the PDCCH based on the blind detection mode. The concept of a search space set is defined in the NR, and at least one search space may be included in one search space set, and one search space includes at least one PDCCH candidate. The base station configures a blind detection opportunity and a control resource set (CORESET) corresponding to the search space set for each search space set. According to the configuration of the blind detection opportunity, the terminal can know which time domain locations need to be blindly detected in the search space set. The PDCCH candidate corresponding to all the search spaces, after the terminal performs the blind detection operation on the PDCCH candidate, the terminal can learn whether the base station sends the PDCCH downlink control information (Downlink Control Information (DCI) of the bearer control signaling to itself, if the blind detection is performed. The base station sends a PDCCH DCI to itself, and the control signaling in the PDCCH DCI can be read by demodulation.

There is no effective solution to the problem of the lack of a scheme for mapping a physical downlink control channel in a physical downlink control channel candidate in the related art.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The embodiments of the present disclosure provide a method and an apparatus for mapping a physical downlink control channel, so as to at least avoid a situation in the related art that lacks a scheme of mapping a physical downlink control channel in a physical downlink control channel candidate.

According to an embodiment of the present disclosure, a method for mapping a physical downlink control channel is provided, including: the second communication node retains at least one physical downlink control channel candidate from multiple physical downlink control channel candidates, or deletes multiple physical downlinks At least one physical downlink control channel candidate of the control channel candidate; wherein the physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies the first condition; The second type of resources of the physical downlink control channel candidate meets the first condition; or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a second condition; and the second type of resource of the physical downlink control channel candidate satisfies a second condition; the second communication node maps the physical downlink control channel on the at least one physical downlink control channel candidate that is reserved or not deleted.

According to another embodiment of the present disclosure, a method for detecting a physical downlink control channel is further provided, including: the first communication node does not reserve at least one of physical downlink control channel physical downlink control channel candidates configured by the second communication node according to a condition Physical downlink control channel candidate, or at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, wherein the physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions The first type of resource of the physical downlink control channel candidate satisfies the first condition; and the second type of resource of the physical downlink control channel candidate satisfies the first condition; or the physical downlink control channel candidate that is or is not deleted is satisfied. At least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a second condition; and the second type of resource of the physical downlink control channel candidate satisfies a second condition; the first communication node is reserved or Physical downlink control channel that has not been deleted The blind detection operation is performed, and the blind detection operation is not performed on the physical downlink control channel candidates that are not reserved or deleted.

According to another embodiment of the present disclosure, an apparatus for mapping a physical downlink control channel is further provided, including: a determining module, configured to reserve at least one physical downlink control channel candidate from multiple physical downlink control channel candidates, or delete multiple At least one physical downlink control channel candidate of the physical downlink control channel candidate; wherein the physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies the first condition And the second type of resources of the physical downlink control channel candidate satisfy the first condition; or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first class of the physical downlink control channel candidate The resource satisfies the second condition; and the second type of resource of the physical downlink control channel candidate satisfies the second condition; and the mapping module is configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.

According to another embodiment of the present disclosure, there is provided an apparatus for detecting a physical downlink control channel, comprising: a determining module, configured to not retain at least a physical downlink control channel physical downlink control channel candidate configured by a second communication node according to a condition a physical downlink control channel candidate, or at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, where the physical downlink control channel candidate that is not reserved or deleted meets the following conditions: The first type of resources of the physical downlink control channel candidate meets the first condition; and the second type of resources of the physical downlink control channel candidate meet the first condition; or the physical downlink control channel candidate that is reserved or not deleted At least one of the following conditions is met: the first type of resource of the physical downlink control channel candidate satisfies a third condition; and the second type of resource of the physical downlink control channel candidate satisfies a third condition; and the detecting module is set to reserve or Physical downlink control letter that has not been deleted Candidate perform blind detection operation, that do not retain or delete candidates PDCCH blind detection does not operate.

According to another embodiment of the present disclosure, a base station is provided, including: a processor, configured to reserve at least one physical downlink control channel candidate from multiple physical downlink control channel candidates, or delete multiple physical downlink control channel candidates At least one physical downlink control channel candidate; wherein the non-reserved or deleted physical downlink control channel candidate satisfies at least one of the following conditions: the first type of resources of the physical downlink control channel candidate satisfy a first condition; and the physical downlink The second type of resource of the control channel candidate satisfies the first condition; or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies the third condition; And the second type of resources of the physical downlink control channel candidate meets a third condition; the processor is further configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.

According to another embodiment of the present disclosure, a terminal is provided, including: a processor, configured to not retain at least one physical downlink control channel candidate in a physical downlink control channel physical downlink control channel candidate configured by a second communication node according to a condition And deleting at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, where the physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions: the physical downlink The first type of resource of the control channel candidate satisfies the first condition; and the second type of resource of the physical downlink control channel candidate satisfies the first condition; or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions The first type of resource of the physical downlink control channel candidate satisfies a third condition; and the second type of resource of the physical downlink control channel candidate satisfies a third condition; the processor is further configured to be reserved or not deleted Physical downlink control channel candidate performs blind detection operation That do not retain or delete candidates PDCCH blind detection does not operate.

According to still another embodiment of the present disclosure, there is also provided a storage medium having stored therein a computer program, wherein the computer program is configured to perform the steps of any one of the method embodiments described above at runtime.

According to still another embodiment of the present disclosure, there is also provided an electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being configured to execute the computer program to perform any of the above The steps in the method embodiments.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the present disclosure, which is a part of the present disclosure, and the description of the present disclosure and the description thereof are not intended to limit the disclosure. In the drawing:

1 is a flowchart of a method of mapping a physical downlink control channel according to an embodiment of the present disclosure;

2 is a schematic diagram of a specific implementation 1 according to an exemplary embodiment of the present disclosure;

FIG. 3 is a block diagram showing the hardware structure of a terminal according to an embodiment of the present disclosure.

detailed description

The present disclosure will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second", and the like in the specification and claims of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

A mobile communication network (including but not limited to a 5G mobile communication network) is provided in the embodiment of the present application, and the network architecture of the network may include a network side device (for example, a base station) and a terminal. In this embodiment, an information transmission method that can be run on the network architecture is provided. It should be noted that the operating environment of the foregoing information transmission method provided in the embodiment of the present application is not limited to the foregoing network architecture.

The first communication node in the present application may be a terminal, and the second communication node may be a base station side device, but is not limited thereto.

Embodiment 1

In this embodiment, a method for mapping a physical downlink control channel is provided. FIG. 1 is a flowchart of a method for mapping a physical downlink control channel according to an embodiment of the present disclosure. As shown in FIG. 1 , the process includes steps S102 and S104. .

In step S102, the second communication node reserves at least one physical downlink control channel candidate from the plurality of physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate of the plurality of physical downlink control channel candidates.

The physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies the first condition; and the second type of resource of the physical downlink control channel candidate satisfies the first condition condition.

Or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a third condition; and the second type of resource of the physical downlink control channel candidate satisfies Three conditions.

In step S104, the second communication node maps the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.

It should be added that the physical downlink control channel candidate may be a PDDCH candidate (Candidate). The first condition described above may be a predetermined condition of both parties to the communication.

The second communication node retains at least one physical downlink control channel candidate from the plurality of physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate of the plurality of physical downlink control channel candidates, where the second communication node does not retain or delete The physical downlink control channel candidate satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a preset first condition; and the second type of resource of the physical downlink control channel candidate satisfies a preset first condition; Or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a third condition; and the second type of resource of the physical downlink control channel candidate satisfies The third condition: the second communication node maps the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate. The foregoing technical solution avoids the lack of a scheme for mapping the physical downlink control channel in the physical downlink control channel candidate in the related art, and implements mapping the physical downlink control channel on the reserved physical downlink control channel candidate.

In an embodiment, the execution body of the foregoing steps may be a base station, a terminal, or the like, but is not limited thereto.

In an embodiment, the execution order of step S102 and step S104 is interchangeable, that is, step S104 may be performed first, and then S102 is performed.

In an embodiment, the first type of resource is a time-frequency resource unit that maps a PDCCH demodulation reference signal (DMRS) in the PDCCH candidate, and the second type of resource is a time-frequency resource of the PDCCH candidate. a subset, and the intersection of the subset and the first type of resources is an empty set; wherein the time-frequency resource unit comprises at least one of: a physical resource block (PRB), orthogonal frequency division multiplexing ( Orthogonal Frequency Division Multiplexing (OFDM) symbol, Resource Element (RE), Resource Element Group (REG), and control channel unit.

In an embodiment, the first condition includes one of: at least one of the first type of resource and the second type of resource, overlapping with the third type of resource; and the first type of resource and the second At least one of the class resources overlaps with the third class of resources, and the overlapping resources satisfy the second condition.

It should be added that the first type of resources satisfying the first condition may be that the first type of resources and the third type of resources have overlapping time-frequency resources. The second type of resources satisfying the first condition may be that the second type of resources and the third type of resources have overlapping time-frequency resources, and the overlapping resources satisfy the second condition.

In an embodiment, at least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the overlapping resources satisfy a second condition, wherein the second condition includes the following At least one of (1) and (2):

(1) The ratio of the number of overlapping resources to the number of the first type of resources or the second type of resources is greater than or equal to the first threshold. That is, the ratio of the time-frequency resource unit included in the overlapping time-frequency resource to the ratio of the first-class resource included in the PDCCH candidate or the number of time-frequency resource units included in the second-type resource is greater than or equal to a preset first threshold. The preset first threshold is a value between [0, 1].

(2) The ratio of the number of overlapping resources to the sum of the number of the first type of resources and the number of the second type of resources is greater than or equal to the second threshold. That is, the ratio of the time-frequency resource unit included in the overlapping time-frequency resource to the first-type resource and the second-type resource included in the PDCCH candidate, the ratio of the total number of time-frequency resource units included, is greater than or equal to the preset second Threshold. The preset second threshold is a value between [0, 1]. It should be added that the comparison party in the condition is the sum of the time-frequency resource unit data included in the first type resource and the second type resource.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a port number greater than or equal to a third threshold, where the third threshold includes {1, 2, 4, 8, 16, 24, 32} A value in .

The third type of resource or the subset of the third type of resources includes a number of reference signal resources greater than or equal to a fourth threshold, wherein the fourth threshold is a positive integer. It should be added that the third type of resources includes reference signal resources, and the number of reference signal resources is greater than or equal to a certain number.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a reference signal resource density greater than or equal to a fifth threshold, wherein the preset fifth threshold is a positive number.

The third type of resource or a subset of the third type of resource includes a reference signal resource with a multiple access mode being a specific multiple access mode, wherein the specific multiple access mode includes at least one of the following: no code division multiplexing (No Code) Division Multiplexing (No CDM), Frequency Division-Code Division Multiplexing 2 (FD-CDM2), Code Division Multiplexing CDM4, and Code Division Multiplexing CDM8.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a code division multiplexing group size (CDM group size) greater than or equal to a sixth threshold, wherein the preset sixth threshold is a positive integer The preset sixth threshold may be one of {1, 2, 4, 8}.

The third type of resource or the subset of the third type of resources includes a reference signal resource with a CDM group index as a specific CDM group index, and the specific CDM group index is required to be added. Contains at least one of the following: {0,0,0}, {0}, {0,1}, {0,1,2,3},{0,1,2},{0,1,2,3 , 4,5}, {0,1,2,3,4,5,6,7}, {0,1,2,3,4,5,6,7,8,9,10,11}, And {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}.

In an embodiment, the third type of resources includes at least one of the following: a rate matching resource; a reserved resource; a Synchronous Signal (SS) resource; a Physical Broadcast Channel (PBCH) resource; Rest of Minimum System Information (RMSI) resources; Long Term Evolution Cell Reference Signal (LTE CRS) resources; and Zero Power Channel Status Information Reference Signal (ZP) CSI-RS) resources.

In an embodiment, the third condition includes at least one of the following: the third type of resource is a control resource set, at least one of the first type of resource and the second type of resource, and the third type of resource has Overlapping; and the first type of resource does not overlap with the third type of resource; and at least one of the first type of resource and the second type of resource overlaps with the third type of resource, and the overlapping resource satisfies Fourth condition.

It should be added that the control resource collection can be COREST.

In an embodiment, the fourth condition comprises at least one of the following (1) and (2):

(1) at least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the number of time-frequency resource units included in the overlapping resources and the first type of resources or the second included in the PDCCH candidate The ratio of the number of time-frequency resource units included in the class resource is less than or equal to a preset seventh threshold, wherein the preset seventh threshold is a value between [0, 1].

(2) at least one of the first type of resource and/or the second type of resource overlaps with the third type of resource, and the number of time-frequency resource units included in the overlapping resource, and the first type of resource and the second included in the PDCCH candidate The ratio of the number of time-frequency resource units included in the class resource is less than or equal to a preset eighth threshold, wherein the preset eighth threshold is a value between [0, 1]. It should be added that the comparison of the conditions is the sum of the number of time-frequency resource units included in the first type of resources and the second type of resources.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a port number less than or equal to a ninth threshold, wherein the ninth threshold includes {1, 2, 4, 8, 16, 24, A value in 32}.

The third type of resource or the subset of the third type of resources includes a number of reference signal resources that is less than or equal to a tenth threshold, wherein the tenth threshold is a positive integer. It should be added that the third type of resources may include reference signal resources, and the number of reference signal resources is greater than or equal to a certain number.

The third type of resource or the subset of the third type of resources includes a reference signal resource whose reference signal resource density is less than or equal to the eleventh threshold, wherein the preset eleventh threshold is a positive number.

The third type of resource or a subset of the third type of resource includes a reference signal resource whose multiple access mode is a specific multiple access mode. The specific multiple access mode includes and is not limited to at least one of the following: no code division multiplexing No CDM, frequency division-code division multiplexing FD-CDM2, code division multiplexing CDM4, and code division multiplexing CDM8.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a code division multiplexing group size CDM group size less than or equal to a twelfth threshold, wherein the preset twelfth threshold is a positive integer The preset twelfth threshold may be one of {1, 2, 4, 8}.

The third type of resource or the subset of the third type of resources includes a reference signal resource with a code division multiplexing group index CDM group index as a specific CDM group index, and the specific CDM group index includes the following At least one of: {0,0,0}, {0}, {0,1}, {0,1,2,3},{0,1,2},{0,1,2,3,4 , 5}, {0,1,2,3,4,5,6,7}, {0,1,2,3,4,5,6,7,8,9,10,11}, and { 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}.

It should be added that the first threshold, the second threshold or the Nth threshold involved in the present application file may be pre-configured by the communication system or semi-statically configured by the base station.

In an embodiment, the third type of resource may be a communication system pre-configuration or a base station semi-static indication, and the third type of resources includes at least one of the following: a rate matching resource; a reserved resource; an SS resource; a PBCH resource; and an RMSI resource. ; LTE CRS resources; and ZP CSI-RS resources.

It should be added that the SS resource and the PBCH resource can also be represented as a synchronization signal/physical broadcast channel SS/PBCH resource.

In an embodiment, the rate matching resource or the reserved resource includes at least one of the following: a semi-static rate matching resource; a dynamic rate matching resource; and at least one of a resource block (RB) and a symbol (symbol) a rate matching resource configured in a manner of at least one of a resource unit RE and a symbol; a semi-static resource reserved; a dynamically reserved resource; configured in a manner of at least one of RB and symbol Reserved resources; reserved resources configured in at least one of RE and symbol; Resource-set-Band Width Part (Resource-set-BWP); Rate-match-physical downlink shared channel - set (rate-match-PDSCH-resource-set); resource-set-cell (Resource-set-cell); resource-set-group-1 (resource-set-group-1); resource-set-group 2 ( Resource-set-group-2); and control resource set (CORESET).

In an embodiment, after the second communication node reserves at least one physical downlink control channel candidate from the multiple physical downlink control channel candidates, or deletes one or more physical downlink control channel candidates of the multiple physical downlink control channel candidates, The method further includes: the second communication node performs rate matching on the specified time-frequency resource; or the second communication node performs rate matching on the specified time-frequency resource, and the second communication node instructs the first communication node to specify the time-frequency resource Rate matching is performed.

In an embodiment, the specified time-frequency resource includes at least one of: all or part of the first type of resources of the PDCCH candidate; all or part of the second type of resources of the PDCCH candidate; the first type of resource and the third A time-frequency resource whose class resources overlap; a time-frequency resource whose second type of resource overlaps with the third type of resource. The third type of resources includes at least one of the following: a rate matching resource; an SS/PBCH resource; an RMSI resource; an LTE CRS resource; and a ZP CSI-RS resource.

According to another embodiment of the present disclosure, there is also provided a method of detecting a physical downlink control channel, comprising the following steps.

Step 1: The first communication node does not retain at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, or deletes the physical downlink control channel physical downlink control configured by the second communication node. At least one physical downlink control channel candidate among the channel candidates.

Step 2: The first communication node performs a blind detection operation on the reserved or not deleted physical downlink control channel candidate, and does not perform a blind detection operation on the physical downlink control channel candidate that is not reserved or deleted.

Through the above steps, the first communication node does not reserve or delete part of the PDCCH candidate, and performs blind detection operation on the remaining PDCCH candidates, which avoids the situation that the terminal blindly detects the PDDCH candidate in the related art and consumes a large amount of resources, and the first communication node does not need to be in the Blind detection is performed on all PDCCH candidates, which speeds up processing and saves a lot of resources.

In an embodiment, the first type of resource is a time-frequency resource unit that maps a PDCCH DMRS in the PDCCH candidate; the second type of resource is a subset of the PDCCH candidate time-frequency resource, and the subset and the first A type of resource intersection is an empty set; wherein the time-frequency resource unit includes at least one of the following: a PRB, an OFDM symbol, an RE, a REG, and a CCE.

In an embodiment, the first condition includes one of: the first type of resource and the second type of resource overlap with the third type of resource; the first type of resource and the second type At least one of the resources overlaps with the third type of resources, and the overlapping resources satisfy the second condition.

It should be added that the first type of resources satisfying the first condition may be that the first type of resources and the third type of resources have overlapping overlapping time-frequency resources. The second type of resources satisfying the first condition may be that the second type of resources and the third type of resources have overlapping overlapping time-frequency resources, and the overlapping resources satisfy the second condition.

(1) The ratio of the number of overlapping resources to the number of the first type of resources or the second type of resources is greater than or equal to the first threshold. That is, the ratio of the time-frequency resource unit included in the overlapping time-frequency resource to the first-level threshold included in the first-type resource or the second-frequency resource included in the PDCCH candidate is greater than or equal to a preset first threshold. Wherein, the preset first threshold is a value between [0, 1].

(2) The ratio of the number of overlapping resources to the sum of the number of the first type of resources and the number of the second type of resources is greater than or equal to the second threshold. That is, the ratio of the time-frequency resource unit included in the overlapping time-frequency resource to the first-type resource and the second-type resource included in the PDCCH candidate, the ratio of the total number of time-frequency resource units included, is greater than or equal to the preset second a threshold, wherein the preset second threshold is a value between [0, 1]. It should be added that the comparison party in the condition is the sum of the time-frequency resource unit data included in the first type resource and the second type resource.

The third type of resource or the subset of the third type of resource includes a reference signal resource in a multiple access mode, where the specific multiple access mode includes at least one of the following: No CDM, FD-CDM2. CDM4, and CDM8.

The third type of resource or the subset of the third type of resources includes a reference signal resource having a CDM group size greater than or equal to a sixth threshold, wherein the preset sixth threshold is a positive integer, and the preset sixth threshold may be Is a value in {1, 2, 4, 8}.

The third type of resource or the subset of the third type of resources includes a reference signal resource with a CDM group index of a specific CDM group index, and the supplementary CDM group index includes at least one of the following: {0 ,0,0},{0},{0,1},{0,1,2,3},{0,1,2},{0,1,2,3,4,5},{0 , 1, 2, 3, 4, 5, 6, 7}, {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11}, and {0, 1, 2, 3,4,5,6,7,8,9,10,11,12,13,14,15}.

In an embodiment, the third type of resources includes at least one of: a rate matching resource; a reserved resource; an SS resource; a PBCH resource; an RMSI resource; an LTE CRS resource; and a ZP CSI-RS resource.

In an embodiment, the third condition includes at least one of the following: the third type of resource is a control resource set, at least one of the first type of resource and the second type of resource, and the third type of resource has Overlapping; the first type of resource does not overlap with the third type of resource; and at least one of the first type of resource and the second type of resource overlaps with the third type of resource, and the overlapping resource satisfies Four conditions.

(2) at least one of the first type of resources and/or the second type of resources overlaps with the third type of resources, and the number of time-frequency resource units included in the overlapping resources and the first type of resources and the first The ratio of the number of time-frequency resource units included in the second type of resources is less than or equal to a preset eighth threshold, wherein the preset eighth threshold is a value between [0, 1]. It should be added that the comparison of the conditions is the sum of the number of time-frequency resource units included in the first type of resources and the second type of resources.

The third type of resource or the subset of the third type of resources includes a reference signal resource with a multiple access mode being a specific multiple access mode, wherein the specific multiple access mode includes and is not limited to at least one of the following: No CDM, FD -CDM2, CDM4, and CDM8.

The third type of resource or the subset of the third type of resources includes a reference signal resource whose CDM group size is less than or equal to the twelfth threshold, wherein the preset twelfth threshold is a positive integer, and the preset tenth The second threshold can be one of {1, 2, 4, 8}.

In an embodiment, the rate matching resource or the reserved resource includes at least one of the following: a semi-static rate matching resource; a dynamic rate matching resource; a rate matching resource configured in a manner of at least one of RB and symbol; a rate matching resource configured in a manner of at least one of symbols; a semi-static reserved resource; a dynamically reserved resource; a reserved resource configured in a manner of at least one of RB and symbol; and at least one of RE and symbol Reserved resources configured in the mode; Resource-set-BWP; rate-match-PDSCH-resource-set; Resource-set-cell; Resource-set-group-1; Resource-set-group-2;

In an embodiment, the first communication node performs rate matching on the specified time-frequency resource when the PDCCH candidate is blindly detected according to the system pre-configuration or according to the information indication of the second communication node.

In an embodiment, the specified time-frequency resource includes at least one of: all or part of the first type of resources of the PDCCH candidate; all or part of the second type of resources of the PDCCH candidate; the first type of resource and the third A time-frequency resource in which the class resource overlaps; and a time-frequency resource in which the second class resource overlaps the third class resource. The third type of resources includes at least one of the following: a rate matching resource; an SS/PBCH resource; an RMSI resource; an LTE CRS resource; and a ZP CSI-RS resource.

The detailed description is made below in conjunction with the exemplary embodiments of the present disclosure.

The NR system also defines some resource collections with specific uses, such as Resource Set resources, SS/PBCH resources, RMSI resources, etc. These specific resource collections are usually system-predefined or semi-static base stations. The configuration mode informs the terminal, so the base station and the terminal can know the time-frequency resources corresponding to the resource sets.

At a certain time, for the transmitting side, the base station needs to select which PDCCH candidate to use from among the PDCCH candidates to transmit the PDCCH DCI to the terminal, that is, map the PDCCH DCI to a certain PDCCH candidate. For a PDCCH candidate that overlaps the time-frequency resource with the specific resource set, since the PDCCH DCI may not be mapped on the overlapping time-frequency resource, the base station may use the PDCCH candidate to map the PDCCH DCI, or may not use the PDCCH candidate. Map PDCCH DCI.

For the receiving side, the terminal needs to blindly detect multiple PDCCH candidates included in the search space, and determine whether the base station sends the PDCCH DCI to itself and the PDCCH candidate used by the base station to send the PDCCH DCI to itself. In the search space for terminal blind detection, there may be some overlapping time-frequency resources between the PDCCH candidate and the specific resource set. The PDCCH candidate may not be mapped on the PDCCH candidate with overlapping time-frequency resources.

The user does not know which PDCCH candidate the PDCCH candidate sends on the PDCCH DCI. Therefore, the worst case user may need to blindly detect all PDCCH candidates in the search space. If the user can make a preliminary judgment on the PDCCH candidate that needs to be blindly detected, the base station does not The PDCCH candidates that map the PDCCH DCI are not blindly detected, thereby reducing the number and complexity of blind detection by users, reducing power consumption, and reducing processing delay.

A set of resources with specific uses are defined in the NR system, such as rate allocation resources, SS/PBCH resources, RMSI resources, reserved resources, and some pilot resources, which are used for specific purposes, and part of the search space or All PDCCH candidates may have time-frequency resource overlap. For a PDCCH candidate that has resource overlap, the base station may not be used to transmit the PDCCH DCI. Therefore, it is preferable that the terminal does not perform blind detection on these PDCCH candidates.

Therefore, a method for determining whether the PDCCH candidate can be used to map the PDCCH DCI is provided, and correspondingly, a method for determining whether the PDCCH candidate is blindly detected by the terminal is also given, based on the method given in this paper. The terminal can ignore blind detection of certain PDCCH candidates, thereby reducing the number of blind detections and processing delay.

Embodiment 1: (When a DMRS RE in a candidate overlaps with a third type of resource, the Candidate is not blindly checked)

The base station configures a search space set A for the terminal, which includes a search space {A1, . . . , An}, and each search space includes several PDCCH candidates. According to the monitoring occasion of the base station's configuration of the search space/search space set, when a certain monitoring occasion arrives, the terminal needs to blindly detect multiple search spaces in the search space set A.

For a certain PDCCH candidate in a certain search space, the base station and the terminal may determine which CCEs the PDCCH candidate corresponds to according to the search space calculation formula, and further determine which time-frequency resource units the PDCCH candidate corresponds to, and the time-frequency resource unit may include the following. At least one: PRB, RE, and OFDM symbols.

According to the PDCCH demodulation reference signal configuration, the configuration is a system pre-defined or a base station configuration, and the base station sends a PDCCH demodulation reference signal at a predefined or configured time-frequency resource location, and the terminal can learn according to the predefined or base station configuration. Among the time-frequency resource units included in the PDCCH candidate, which time-frequency resource units transmit PDCCH demodulation pilots, and these time-frequency resource units are referred to as the first type of PDCCH candidate resource units. For those time-frequency resource units that do not transmit the PDCCH demodulation reference signal, which are referred to as a second type of PDCCH candidate resource unit, the PDCCH candidate may include several first-class PDCCH candidate resource units and several second-type PDCCHs. Candidate resource unit.

The base station configures at least one third type of resource to the terminal, and the third type of resource may include at least one of the following: a rate matching resource, an SS/PBCH resource, an RMSI resource, an LTE CRS resource, and a ZP CSI-RS resource. The rate matching resource may be at least one of the following: a semi-static rate matching resource, a dynamic rate matching resource, an RB-symbol level rate matching resource, and an RE-symbol level rate matching resource.

In the case that a certain PDCCH candidate in the search space overlaps with the time-frequency resource of the at least one first-type PDCCH candidate resource unit and the certain specific resource set, the base station may discard the PDCCH candidate, and The PDCCH DCI is sent to the terminal on the PDCCH candidate, and the terminal does not need to blindly detect the PDCCH candidate. According to this method, the terminal can determine which PDCCH candidates in the search space {A1, . . . , An} need to perform blind detection, and which PDCCH candidates do not need to perform blind detection, and the terminal only needs to blindly determine those PDCCH candidates that need to perform blind detection. Detection operation.

2 is a schematic diagram of a specific implementation 1 according to an exemplary embodiment of the present disclosure, as shown in FIG. 2, in which Candidate1 and Candidate2 are PDCCH candidates in the search space, where a first type of PDCCH candidate resource unit and a specific resource set of Candidate1 There is overlap, as shown by the dashed box in Figure 2, then the terminal will not blindly detect Candidate1. The first type of PDCCH candidate resource unit of the Candidate2 does not overlap with the specific resource set (the second type of PDCCH candidate resources of the Candidate2 overlaps with the specific resource set), and the terminal performs blind detection on the Candidate2.

Embodiment 2: (When a DMRS RE or all REs in a candidate overlap with a specific resource set to reach a certain threshold, the Candidate is not blindly checked)

The base station configures a search space set A for the terminal, which includes a search space {A1, . . . , An}, and each search space includes several PDCCH candidates. According to the monitoring occasion configured by the base station to the search space/search space set, when a monitoring occasion arrives, the terminal needs to blindly detect multiple search spaces in the search space set A.

According to the PDCCH demodulation reference signal configuration, the configuration is a system pre-defined or a base station configuration, and the base station sends a PDCCH demodulation reference signal at a predefined or configured time-frequency resource location, and the terminal can learn according to the predefined or base station configuration. Among the time-frequency resource units included in the PDCCH candidate, which time-frequency resource units transmit the PDCCH demodulation reference signals, and these time-frequency resource units are referred to as the first type of PDCCH candidate resource units. For those time-frequency resource units that do not transmit the PDCCH demodulation reference signal, which are referred to as a second type of PDCCH candidate resource unit, the PDCCH candidate may include several first-class PDCCH candidate resource units and several second-type PDCCHs. Candidate resource unit.

The base station configures the terminal with at least one specific resource set, where the specific resource set may include at least one of the following: a rate matching resource, an SS/PBCH resource, an RMSI resource, an LTE CRS resource, and a ZP CSI-RS resource. The rate matching resource may be at least one of the following: a semi-static rate matching resource, a dynamic rate matching resource, an RB-symbol level rate matching resource, and an RE-symbol level rate matching resource.

For a certain PDCCH candidate in a certain search space, if the time-frequency resource unit included in the search space overlaps with the specific resource set, and the overlapping resource satisfies the first condition, the base station discards the PDCCH candidate, and does not The PDCCH candidate is mapped to the PDCCH DCI, and the terminal does not blindly detect the PDCCH candidate. If there is no overlapping resource or overlapping resources but does not satisfy the first condition, the base station may map the PDCCH DCI on the PDCCH candidate, and the terminal still blindly detects the PDCCH candidate.

The first condition includes at least one of the following:

1) The overlapping resources do not include the first type of PDCCH candidate resources, and the overlapping resources include the second type of PDCCH candidate resources.

2) The overlapping resources include the second type of PDCCH candidate resources.

3) The ratio of the number of overlapping resources to the number of at least one of all the first type of PDCCH candidate resource units and the second type of PDCCH candidate resource units included in the PDCCH candidate is greater than or equal to the threshold 1. The overlapping resource includes at least one of a first type of PDCCH candidate resource unit and a second type of PDCCH candidate resource unit, where the threshold 1 is a value between [0, 1], and the threshold 1 may be a system pre-configuration or a base station. Semi-static configuration.

4) The at least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit included in the overlapping resource includes a pilot resource whose port number is greater than or equal to the threshold 2, and the pilot may be an LTE CRS, At least one of ZP CSI-RS and CSI-RS, but is not limited thereto. The threshold 2 may be one of {1, 2, 4, 8, 16, 24, 32}, and the threshold 2 may be a system pre-configuration or a base station semi-static configuration.

5) At least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit that is included in the overlap resource includes a pilot resource whose resource number is greater than or equal to the threshold 3, and the pilot may be an LTE CRS, At least one of P CSI-RS and CSI-RS, but is not limited thereto. The threshold 3 is a positive integer, which may be a system pre-configuration or a semi-static configuration of the base station.

6) At least one of the first type of PDCCH candidate resource unit and/or the second type of PDCCH candidate resource unit included in the overlapping resource includes a pilot resource having a density greater than or equal to a threshold 4, and the pilot may be an LTE CRS, At least one of ZP CSI-RS and CSI-RS, but is not limited thereto. The threshold 4 is a positive number, for example, may be a value of {0.5%, 1%, 3%}, which may be a system pre-configuration or a base station semi-static configuration.

7) The at least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit included in the overlapping resource includes a pilot resource whose multiple access mode is a specific multiple access mode, and the pilot may be an LTE CRS. At least one of ZP CSI-RS and CSI-RS, but is not limited thereto. The specific multiple access mode includes at least one of the following: No CDM, FD-CDM2, CDM4, FD-CDM2, and CDM8, etc., which may be system pre-configuration or base station semi-static configuration.

8) At least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit included in the overlapping resource, where the pilot resource with a CDM group size greater than or equal to the threshold 5 is included, and the pilot may be an LTE CRS, At least one of ZP CSI-RS and CSI-RS, but is not limited thereto. The threshold 5 is a positive integer, for example, may be a value of {1, 2, 4, 8}, which may be a system pre-configuration or a semi-static configuration of the base station.

9) At least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit included in the overlapping resource, where the CDM group index is a pilot resource of a specific CDM group index, and the pilot may be an LTE CRS. At least one of ZP CSI-RS and CSI-RS, but is not limited thereto. The specific CDM group Index includes at least one of the following: {0, 0, 0}, {0}, {0, 1}, {0, 1, 2, 3}, {0, 1, 2}, {0 ,1,2,3,4,5},{0,1,2,3,4,5,6,7},{0,1,2,3,4,5,6,7,8,9 , 10, 11}, and {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15} and so on.

Specific Embodiment 3: (rate matching of PDCCH mapping)

According to the PDCCH demodulation reference configuration, the configuration is a system pre-defined or a base station configuration, and the base station sends a PDCCH demodulation reference signal at a predefined or configured time-frequency resource location, and the terminal can learn the PDCCH according to a predefined or base station configuration. Among the time-frequency resource units included in the candidate, the PDCCH demodulation reference signals are sent on the time-frequency resource units, and the time-frequency resource units are referred to as the first-type PDCCH candidate resource units. For those time-frequency resource units that do not transmit the PDCCH demodulation reference signal, which are referred to as a second type of PDCCH candidate resource unit, the PDCCH candidate may include several first-class PDCCH candidate resource units and several second-type PDCCHs. Candidate resource unit.

The base station selects one PDCCH candidate from the plurality of PDCCH candidates to map the PDCCH DCI. If the PDCCH candidate and the specific resource set have overlapping resources, the base station maps the PDCCH DCI to the PDCCH candidate, and all of the overlapping resources Or at least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit performs rate matching, that is, removes all or part of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource in the overlapping resource. The PDCCH DCI is mapped on other resources within the PDCCH candidate of at least one of the cells.

If the terminal determines that a certain PDCCH candidate in the search space needs to perform blind detection, if the PDCCH candidate and the specific resource set have overlapping resources, the terminal considers that the base station will map all the overlapping resources when mapping the PDCCH DCI on the PDCCH candidate. Or at least one of the first type of PDCCH candidate resource unit and the second type of PDCCH candidate resource unit performs rate matching, and at least one of blind detection and decoding of the PDCCH candidate by the terminal is based on the rate matching assumption.

In an embodiment, the at least one of the blind detection and the decoding based on the rate matching hypothesis is: the terminal determines the CCE occupied by the PDCCH candidate, and further determines the REG, and further determines the RE, after learning the RE occupied by the PDCCH candidate. After deducting at least one of all or part of the first type of PDCCH candidate resource unit and/or the second type of PDCCH candidate resource unit in the overlapping resource, the PDCCH DCI is mapped by using other remaining REs.

In the present application, the technical features in the various embodiments may be used in combination in one embodiment without conflict.

By using the method given in the present disclosure, the terminal can determine the monitoring occasion in a certain search space, which Candidates need to perform blind detection in the search space, and which Candidate does not need to perform blind detection, thereby reducing the number of blind detections and reducing the delay and Power consumption, which facilitates the terminal to quickly demodulate DCI. And for Candidate, which needs to perform blind detection, the terminal can determine whether it needs to perform rate matching operation on some of the time-frequency resources.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware. Based on such understanding, the technical solution of the present disclosure, which is essential or contributes to the related art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, CD-ROM). The instructions include a number of instructions for causing a terminal device (which may be a cell phone, computer, server, or network device, etc.) to perform the methods described in various embodiments of the present disclosure.

Embodiment 2

An apparatus for mapping a physical downlink control channel is also provided in this embodiment. The apparatus is configured to implement the foregoing embodiments and example implementations, and details are not described herein. As used hereinafter, the term "module" may implement a combination of at least one of software and hardware for a predetermined function. Although the devices described in the following embodiments may be implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

According to an embodiment of the present disclosure, an apparatus for mapping a physical downlink control channel is provided, including a first determining module and a mapping module.

The first determining module is configured to reserve at least one physical downlink control channel candidate from the multiple physical downlink control channel candidates, or delete at least one physical downlink control channel candidate of the multiple physical downlink control channel candidates.

The physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies the first condition; and the second type of resource of the physical downlink control channel candidate satisfies the first condition condition;

The mapping module is configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.

It should be added that the first type of resources satisfying the first condition may be that the first type of resources overlaps with the third type of resources with overlapping time-frequency resources. The second type of resources satisfying the first condition may be that the second type of resources and the third type of resources have overlapping overlapping time-frequency resources, and the overlapping resources satisfy the second condition.

(1) The ratio of the number of overlapping resources to the number of the first type of resources or the second type of resources is greater than or equal to the first threshold. That is, the ratio of the number of time-frequency resource units included in the overlapping time-frequency resource to the number of time-frequency resource units included in the first-type resource or the second-type resource included in the PDCCH candidate is greater than or equal to a preset first threshold. Wherein, the preset first threshold is a value between [0, 1].

The third type of resource or a subset of the third type of resource includes a reference signal resource whose multiple access mode is a specific multiple access mode. The specific multiple access mode includes at least one of the following: No CDM, FD-CDM2, CDM4, and CDM8.

It should be added that the control resource collection can be COREST.

(2) at least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the number of time-frequency resource units included in the overlapping resources and the first type of resources and the second included in the PDCCH candidate The class resource, the ratio of the total number of time-frequency resource units included, is less than or equal to a preset eighth threshold, wherein the preset eighth threshold is a value between [0, 1]. It should be added that the comparison of the conditions is the sum of the number of time-frequency resource units included in the first type of resources and the second type of resources.

The third type of resource or a subset of the third type of resource includes a reference signal resource whose multiple access mode is a specific multiple access mode. The specific multiple access mode includes and is not limited to at least one of the following: No CDM, FD-CDM2, CDM4, and CDM8.

The third type resource or a subset of the third type resource includes a reference signal resource with a CDM group index as a specific CDM group index. It should be added that the specific CDM group Index contains at least one of the following: {0, 0, 0}, {0}, {0, 1}, {0, 1, 2, 3}, {0, 1 , 2}, {0,1,2,3,4,5},{0,1,2,3,4,5,6,7},{0,1,2,3,4,5,6 , 7, 8, 9, 10, 11}, and {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}.

It should be added that the SS resource and the PBCH resource can also be represented as SS/PBCH resources.

In an embodiment, after the first determining module reserves at least one physical downlink control channel candidate from the multiple physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate of the multiple physical downlink control channel candidates, To perform rate matching on the specified time-frequency resource; or, to perform rate matching on the specified time-frequency resource, and instruct the first communication node to perform rate matching on the specified time-frequency resource.

In an embodiment, the specified time-frequency resource includes at least one of: all or part of the first type of resources of the PDCCH candidate; all or part of the second type of resources of the PDCCH candidate; the first type of resource and the third a time-frequency resource with overlapping resources of the class; a time-frequency resource overlapping the resource of the second type with the third resource; wherein the third resource includes at least one of the following: a rate matching resource; an SS/PBCH resource; and an RMSI resource ; LTE CRS resources; and ZP CSI-RS resources.

According to another embodiment of the present disclosure, there is also provided an apparatus for detecting a physical downlink control channel, comprising a second determining module and a detecting module.

a second determining module, configured to not retain at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, or delete the physical downlink control channel PDCCH candidate configured by the second communication node according to the condition At least one PDCCH candidate.

The condition includes at least one of the following: the first type of resources of the PDCCH candidate satisfy the first condition; and the second type of resources of the PDCCH candidate satisfy the first condition.

The detecting module is configured to perform a blind detection operation on the PDCCH candidate that is reserved or not deleted, and does not perform a blind detection operation on the PDCCH candidate that is not reserved or deleted.

(1) at least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the number of time-frequency resource units included in the overlapping resources and the first type of resources or the second included in the PDCCH candidate The ratio of the number of time-frequency resource units included in the class resource is less than or equal to the preset seventh threshold. Wherein, the preset seventh threshold is a value between [0, 1].

The third type of resource or a subset of the third type of resource includes a reference signal resource having a multiple access mode for a specific multiple access mode. The specific multiple access mode includes and is not limited to at least one of the following: No CDM, FD-CDM2, CDM4, and CDM8.

In an embodiment, the detecting module performs rate matching on the specified time-frequency resource when the PDCCH candidate is blindly detected according to the system pre-configuration or according to the information indication of the second communication node.

It should be noted that the foregoing multiple modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the multiple modules are The form of any combination is located in a different processor.

Embodiment 3

According to another embodiment of the present disclosure, there is also provided a base station comprising a first processor.

The first processor is configured to reserve at least one physical downlink control channel candidate from the multiple physical downlink control channel candidates, or delete at least one physical downlink control channel candidate of the multiple physical downlink control channel candidates.

The physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions: the first type of resources of the physical downlink control channel candidate meets the first condition; and the second type of resources of the physical downlink control channel candidate meets First condition.

Or the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions: the first type of resource of the physical downlink control channel candidate satisfies a third condition; and the second type of resource of the physical downlink control channel candidate Meet the third condition.

The first processor is further configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.

In an embodiment, the base station further includes a first communication device configured to send the mapped physical downlink control channel to the terminal.

According to another embodiment of the present disclosure, there is also provided a terminal, the terminal comprising:

The second processor is configured to not retain at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, or delete the physical downlink control channel PDCCH candidate configured by the second communication node according to the condition At least one PDCCH candidate.

The condition includes at least one of the following: a first type of resource of the PDCCH candidate satisfies a first condition; and a second type of resource of the PDCCH candidate satisfies a first condition.

The second processor is further configured to perform a blind detection operation on the PDCCH candidate that is reserved or not deleted, and does not perform a blind detection operation on the PDCCH candidate that is not reserved or deleted.

In an embodiment, the terminal further comprises a second communication device configured to receive a PDCCH candidate configured by the second communication node.

3 is a block diagram showing the hardware structure of a terminal according to an embodiment of the present disclosure. As shown in FIG. 3, the mobile terminal 30 may include at least one (only one is shown in FIG. 3) processor 302 (the processor 302 may include but not It is limited to a microprocessor (Microcontroller Unit (MCU) or a processing device such as a Field-Programmable Gate Array (FPGA)) and a memory 304 provided to store data. In an embodiment, the mobile terminal may further include a transmission device 306 and a input and output device 308 for communication functions. It will be understood by those skilled in the art that the structure shown in FIG. 3 is merely illustrative, and does not limit the structure of the above mobile terminal. For example, the mobile terminal 30 may also include more or fewer components than those shown in FIG. 3, or have a different configuration than that shown in FIG.

The memory 304 can be used to store software programs and modules of the application software, such as the program instructions or modules corresponding to the method for detecting the physical downlink control channel in the embodiment of the present disclosure, and the processor 302 runs the software program and the module stored in the memory 304, thereby Performing the above-mentioned methods by performing multiple function applications and data processing. Memory 304 can include high speed random access memory, and can also include non-volatile memory, such as at least one magnetic storage device, flash memory, or other non-volatile solid state memory. In some examples, memory 304 can further include memory remotely located relative to processor 302, which can be connected to mobile terminal 30 over a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Transmission device 306 is arranged to receive or transmit data via a network. The above-described network specific example may include a wireless network provided by a communication provider of the mobile terminal 30. In one example, transmission device 306 includes a Network Interface Controller (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 306 can be a Radio Frequency (RF) module configured to communicate with the Internet wirelessly.

Embodiment 4

According to another embodiment of the present disclosure, there is also provided a storage medium having stored therein a computer program, wherein the computer program is configured to execute the method described in any one of the above embodiments .

According to another embodiment of the present disclosure, there is also provided an electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being arranged to execute the computer program to perform the above-described embodiments The method described in one item.

Those skilled in the art will appreciate that the above-described modules or steps of the present disclosure may be implemented in a general-purpose computing device, which may be centralized on a single computing device or distributed across a network of multiple computing devices. For example, they may be implemented in program code executable by a computing device such that they may be stored in a storage device for execution by a computing device and, in some instances, may be performed in a different order than that illustrated herein. Or the steps described, either separately as a plurality of integrated circuit modules, or as a plurality of modules or steps in a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.

Claims

A method for mapping a physical downlink control channel includes:

The second communication node reserves at least one physical downlink control channel candidate from the plurality of physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate of the plurality of physical downlink control channel candidates;

The physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the first condition; and,

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the second condition; and,

The second type of resources of the physical downlink control channel candidate meets the second condition;

The second communication node maps the physical downlink control channel on at least one physical downlink control channel candidate that is reserved or not deleted.
The method of claim 1 wherein

The first type of resource is a resource that maps a physical downlink control channel demodulation reference signal PDCCH DMRS in the physical downlink control channel candidate;

The second type of resource is a resource of the non-PDCCH DMRS in the physical downlink control channel candidate.
The method of claim 2 wherein said first condition comprises one of:

At least one of the first type of resources and the second type of resources overlaps with the third type of resources;

At least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the overlapping resources satisfy a third condition.
The method of claim 3 wherein said third condition comprises at least one of:

a ratio of the number of overlapping resources to the number of the first type of resources or the second type of resources, greater than or equal to a first threshold;

The ratio of the number of overlapping resources to the sum of the number of the first type of resources and the number of the second type of resources is greater than or equal to a second threshold;

The third type of resource or the subset of the third type of resources includes a reference signal resource having a port number greater than or equal to a third threshold;

The third type of resources or the subset of the third type of resources includes a number of reference signal resources greater than or equal to a fourth threshold;

The third type of resource or the subset of the third type of resources includes a reference signal resource having a reference signal resource density greater than or equal to a fifth threshold;

And the subset of the third type of resources or the third type of resources includes a reference signal resource in a multiple access mode, where the specific multiple access mode includes at least one of the following: no code division multiplexing No CDM, frequency division-code division multiplexing FD-CDM2, code division multiplexing CDM4, and code division multiplexing CDM8;

The third type of resource or the subset of the third type of resources includes a reference signal resource having a code division multiplexing group size CDM group size greater than or equal to a sixth threshold; and

The third type of resources or the subset of the third type of resources includes a reference signal resource whose code division multiplexing group index CDM group index is a specific CDM group index.
The method of claim 3 wherein said third type of resource comprises at least one of:

Rate matching resource; reserved resource; synchronization signal SS resource; broadcast channel PBCH resource; remaining minimum system information RMSI resource; long term evolution system cell reference signal LTE CRS resource; and zero power channel state information reference signal ZP CSI-RS resource.
The method of claim 1 wherein said second condition comprises at least one of:

The third type of resource is a control resource set, and at least one of the first type resource and the second type resource overlaps with the third type resource;

The first type of resource does not overlap with the third type of resource; and,

At least one of the first type of resources and the second type of resources overlaps with the third type of resources, and the overlapping resources satisfy a fourth condition.
The method of claim 6 wherein said third type of resource comprises at least one of:

Rate matching resource; reserved resource; synchronization signal SS resource; broadcast channel PBCH resource; remaining minimum system information RMSI resource; long term evolution system cell reference signal LTE CRS resource; and zero power channel state information reference signal ZP CSI-RS resource.
The method of claim 6 wherein said fourth condition comprises at least one of:

a ratio of the number of overlapping resources to the number of the first type of resources or the second type of resources, less than or equal to a seventh threshold;

The ratio of the number of overlapping resources to the sum of the number of the first type of resources and the number of the second type of resources is less than or equal to an eighth threshold;

The third type of resource or the subset of the third type of resources includes a reference signal resource having a port number less than or equal to a ninth threshold;

The third type of resources or the subset of the third type of resources, the number of reference signal resources included is less than or equal to a tenth threshold;

The third type resource or the subset of the third type resource includes a reference signal resource whose reference signal resource density is less than or equal to the eleventh threshold;

The third type of resource or the subset of the third type of resources includes a reference signal resource in a multiple access mode, where the specific multiple access mode includes and is not limited to at least one of the following: no code Division multiplexing No CDM, frequency division-code division multiplexing FD-CDM2, code division multiplexing CDM4, and code division multiplexing CDM8;

The third type of resource or the subset of the third type of resources includes a reference signal resource having a code division multiplexing group size CDM group size less than or equal to a twelfth threshold; and

The third type of resources or the subset of the third type of resources includes a reference signal resource whose code division multiplexing group index CDM group index is a specific CDM group index.
The method according to claim 5 or 7, wherein the rate matching resource or reserved resource comprises at least one of the following:

Semi-static rate matching resource;

Dynamic rate matching resources;

a rate matching resource configured in a manner of at least one of a resource block RB and a symbol symbol;

a rate matching resource configured in a manner of at least one of a resource unit RE and a symbol;

Semi-static reserve resources;

Dynamic reserve resources;

a reserved resource configured in at least one of RB and symbol; and,

A reserved resource configured in at least one of RE and symbol.
The method according to claim 2, after the second communication node reserves at least one physical downlink control channel candidate from the plurality of physical downlink control channel candidates, or deletes at least one physical downlink control channel candidate of the plurality of physical downlink control channel candidates, Also includes:

The second communication node performs rate matching on the specified time-frequency resource;

Or, the second communication node performs rate matching on the specified time-frequency resource, and the second communication node instructs the first communication node to perform rate matching on the specified time-frequency resource.
The method of claim 10, wherein the specified time-frequency resource comprises at least one of:

All or part of the first type of resources of the physical downlink control channel candidate;

All or part of the second type of resources of the physical downlink control channel candidate;

All or part of the time-frequency resource in which the first type of resource overlaps with the third type of resource;

All or part of the time-frequency resource in which the second type of resource overlaps with the third type of resource;

The third type of resources, including at least one of the following: a rate matching resource; a reserved resource; a synchronization signal SS resource; a broadcast channel PBCH resource; a remaining minimum system information RMSI resource; a long term evolution system cell reference signal LTE CRS resource; And a zero power channel state information reference signal ZP CSI-RS resource.
A method for detecting a physical downlink control channel includes:

The first communication node does not retain at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node, or deletes the physical downlink control channel physical downlink control channel candidate configured by the second communication node At least one physical downlink control channel candidate, wherein the physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the first condition;

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the second condition;

The second type of resources of the physical downlink control channel candidate meets the second condition;

The first communication node performs a blind detection operation on the reserved or not deleted physical downlink control channel candidate, and does not perform a blind detection operation on the physical downlink control channel candidate that is not reserved or deleted.
The method of claim 12, wherein

The first communication node performs rate matching on the specified time-frequency resource when the physical downlink control channel candidate is blindly detected according to the system pre-configuration or according to the information indication of the second communication node.
The method of claim 13 wherein said specified time-frequency resource comprises at least one of:

All or part of the first type of resources of the physical downlink control channel candidate;

All or part of the second type of resources of the physical downlink control channel candidate;

All or part of the time-frequency resource in which the first type of resource overlaps with the third type of resource;

All or part of the time-frequency resource in which the second type of resource overlaps with the third type of resource;

The third type of resources, including at least one of the following: a rate matching resource; a reserved resource; a synchronization signal SS resource; a broadcast channel PBCH resource; a remaining minimum system information RMSI resource; a long term evolution system cell reference signal LTE CRS resource; And a zero power channel state information reference signal ZP CSI-RS resource.
An apparatus for mapping a physical downlink control channel includes:

a determining module, configured to reserve at least one physical downlink control channel candidate from multiple physical downlink control channel candidates, or delete at least one physical downlink control channel candidate of multiple physical downlink control channel candidates;

The physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the first condition;

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the second condition;

The second type of resources of the physical downlink control channel candidate meets the second condition;

The mapping module is configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.
A device for detecting a physical downlink control channel includes:

a determining module, configured to not retain at least one physical downlink control channel candidate of the physical downlink control channel physical downlink control channel candidate configured by the second communication node according to the condition, or delete the physical downlink control channel physical downlink control channel candidate configured by the second communication node At least one physical downlink control channel candidate, wherein the physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the first condition;

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the second condition;

The second type of resources of the physical downlink control channel candidate meets the second condition;

The detecting module is configured to perform a blind detection operation on the reserved or undeleted physical downlink control channel candidate, and does not perform a blind detection operation on the physical downlink control channel candidate that is not reserved or deleted.
A base station comprising:

The processor is configured to reserve at least one physical downlink control channel candidate from the multiple physical downlink control channel candidates, or delete at least one physical downlink control channel candidate of the multiple physical downlink control channel candidates;

The physical downlink control channel candidate that is not reserved or deleted meets at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate meets the first condition;

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate meets the second condition;

The second type of resources of the physical downlink control channel candidate meets the second condition;

The processor is further configured to map the physical downlink control channel on the reserved or not deleted physical downlink control channel candidate.
A terminal, comprising: a processor, configured to not retain at least one physical downlink control channel candidate in a physical downlink control channel physical downlink control channel candidate configured by a second communication node according to a condition, or to delete a physical downlink control configured by a second communication node At least one physical downlink control channel candidate in the channel physical downlink control channel candidate, where

The physical downlink control channel candidate that is not reserved or deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the first condition;

The second type of resources of the physical downlink control channel candidate satisfy the first condition;

Alternatively, the physical downlink control channel candidate that is reserved or not deleted satisfies at least one of the following conditions:

The first type of resources of the physical downlink control channel candidate satisfy the second condition;

The second type of resources of the physical downlink control channel candidate meets the second condition;

The processor is further configured to perform a blind detection operation on the reserved or not deleted physical downlink control channel candidate, and does not perform a blind detection operation on the physical downlink control channel candidate that is not reserved or deleted.
A storage medium having stored therein a computer program, wherein the computer program is arranged to execute the method of any one of claims 1 to 14 at runtime.
An electronic device comprising a memory and a processor, wherein the memory stores a computer program, the processor being arranged to execute the computer program to perform the method of any one of claims 1 to 14.