CN115136527A

CN115136527A - Downlink control information receiving method, transmitting method and device

Info

Publication number: CN115136527A
Application number: CN202080097228.0A
Authority: CN
Inventors: 刘显达; 李雪茹
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-02-21
Filing date: 2020-02-21
Publication date: 2022-09-30
Also published as: WO2021164031A1

Abstract

The application provides a method and a device for receiving and sending downlink control information, relates to the technical field of communication, and is used for achieving diversity gain of PDCCH transmission. The method comprises the following steps: the user equipment receives indication information of CORESET, wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate; wherein the first PDCCH candidate comprises a first CCE and a second CCE, the first CCE and the second CCE both comprise one or more CCEs, and the CCE numbers of the first CCE and the second CCE are different, the first QCL is assumed to correspond to the first CCE, and the second QCL is assumed to correspond to the second CCE; the user equipment receives downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.

Description

Downlink control information receiving method, transmitting method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method and an apparatus for receiving, sending and receiving downlink control information.

Background

In a wireless communication system, a base station issuing Downlink Control Information (DCI) may need a User Equipment (UE) to determine, on some specific physical resources, the DCI issued on the specific physical resources through multiple blind detections on candidate physical resources. The implications of DCI blind detection are: and performing signal detection and decoding on different candidate physical resources according to a certain rule.

A set of candidate physical resources where the DCI is located is defined as a control resource set (CORESET), and a physical resource location where the UE blindly detects the DCI each time is defined as a Physical Downlink Control Channel (PDCCH) candidate. The size and the position of the physical resource corresponding to a PDCCH candidate may be determined by Aggregation Level (AL) and Control Channel Element (CCE), where the AL represents the number of CCEs occupied by one PDCCH candidate, and the actual physical resource positions occupied by CCEs with different numbers in CORESET are different. One CCE includes 6 Resource Element Groups (REGs), each REG includes 1 Resource Block (RB) in the frequency domain and 1 OFDM symbol in the time domain, and the REGs are numbered in the time domain and the frequency domain, and a plurality of REGs with consecutive numbers may be referred to as REG clusters (REG clusters). The protocol agrees on the mapping relationship between REG clusters and each CCE number, which can be used to determine the actual physical resource location of each CCE.

In order to increase the reliability of DCI transmission, a DCI transmission scheme based on a multi-Transmission Receiver Point (TRP) is proposed in the prior art. In this scheme, different OFDM symbols of one PDCCH candidate correspond to different quasi co-location (QCL) hypotheses, so whether the scheme can achieve diversity gain is limited by the number of OFDM symbols occupied by one PDCCH candidate. In addition, when the CORESET includes a plurality of OFDM symbols, the UE cannot perform time-domain filtering according to demodulation reference signals (DMRSs) on the plurality of OFDM symbols, so that the channel estimation performance cannot be improved.

Disclosure of Invention

The application provides a method and a device for receiving downlink control information, and is used for realizing diversity gain of PDCCH transmission when DCI is transmitted on PDCCH candidates.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, a method for receiving downlink control information is provided, where the method includes: receiving indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, or the CORESET comprises the first CCE and the second CCE; the first CCE and the second CCE both comprise one or more CCEs, and the CCE numbers of the first CCE and the second CCE are different, the first QCL is supposed to correspond to the first CCE, and the second QCL is supposed to correspond to the second CCE; receiving downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.

In the above technical solution, the first PDCCH candidate associated with the CORESET includes a first CCE and a second CCE, or the CORESET includes a first CCE and a second CCE, the first CCE corresponds to the first QCL hypothesis, and the second CCE corresponds to the second QCL hypothesis, so that the first PDCCH candidate corresponds to the two QCL hypotheses, and thus, the network device may implement diversity gain for PDCCH transmission when sending DCI on the first PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis. Meanwhile, the technical scheme is that the QCL hypothesis mapped by taking frequency domain resources as granularity can correspond to a plurality of QCL hypotheses on a plurality of symbols of a time domain, so that joint filtering on the plurality of symbols can be realized, and the performance of channel estimation is improved.

In a possible implementation manner of the first aspect, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb shape in the frequency domain of the CORESET, which may also be referred to as that the CCEs in the first CCE and the CCEs in the second CCE are alternately distributed in the frequency domain of the CORESET, each comb may include W CCEs, that is, a plurality of QCL hypotheses are alternately mapped with W numbered consecutive CCEs as a granularity, and a value of W may be a positive integer. Optionally, the first CCE includes odd-numbered CCEs, and the second CCE includes even-numbered CCEs. When the CORESET comprises a first CCE and a second CCE, the first CCE comprises odd-numbered CCEs in the CORESET, and the second CCE comprises even-numbered CCEs in the CORESET. When the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes odd-numbered CCEs in the first PDCCH candidate, and the second CCE includes even-numbered CCEs in the first PDCCH candidate. In the foregoing possible implementation manner, the PDCCH candidate associated with the CORESET may be made to correspond to two QCL hypotheses, so that the network device may implement diversity gain of PDCCH transmission when sending DCI on the PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis.

In a possible implementation manner of the first aspect, the precoding granularity of the CORESET is a resource element group REG cluster, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster. In the possible implementation manner, the precoding of multiple REGs in the same REG cluster is the same, so that the signals on the multiple REGs can be jointly filtered, and the performance of channel estimation is further ensured.

In one possible implementation manner of the first aspect, the first CCE includes M numbered consecutive CCEs, the second CCE includes N numbered consecutive CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). When the CORESET comprises the first CCE and the second CCE, the first CCE comprises M numbered consecutive CCEs in the CORESET, and the second CCE comprises N numbered consecutive CCEs in the CORESET, where the number of CCEs included in the CORESET may be (M + N). When the CORESET associates with the first PDCCH candidate, where the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M CCEs with consecutive numbers in the first PDCCH candidate, and the second CCE includes N CCEs with consecutive numbers in the first PDCCH candidate, where the number of CCEs included in the first PDCCH candidate may be (M + N). Optionally, M is equal to N. Optionally, the plurality of first PDCCH candidates associated with the CORESET each include a first CCE and a second CCE; when the plurality of first PDCCH candidates correspond to different aggregation levels, there is a mutual overlap of a first CCE and a second CCE between two first PDCCH candidates in the plurality of first PDCCH candidates. In the possible implementation manner, the PDCCH candidate associated with the CORESET may correspond to two QCL hypotheses, so that the network device may implement diversity gain of PDCCH transmission when sending DCI on the PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis; in addition, the implementation mode can also ensure that CCEs corresponding to the same QCL hypothesis are continuous on the frequency domain as much as possible, thereby ensuring the performance of channel estimation.

In a possible implementation manner of the first aspect, the pre-coding of multiple REG clusters that are consecutive in frequency domain within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same. This precoding scheme may also be referred to as wideband precoding, where the wideband is a frequency band comprised by a plurality of consecutive REG clusters. In the possible implementation manner, the precoding of a plurality of consecutive REG clusters is the same, so that CCEs corresponding to the same QCL hypothesis are consecutive in the frequency domain as much as possible, and thus, signals on the plurality of CCEs can be jointly filtered, thereby ensuring the performance of channel estimation.

In a possible implementation manner of the first aspect, the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level in the plurality of PDCCH candidates associated with the core set, where the predetermined aggregation level may be set in advance or configured by a network device, for example, a value of the predetermined aggregation level may be 4, 8, or 16. Optionally, the first PDCCH candidate is a PDCCH candidate with the largest aggregation level among PDCCH candidates associated with the CORESET. In the possible implementation manner, CCEs corresponding to the same QCL hypothesis may be made continuous in the frequency domain as much as possible, so that signals on the multiple CCEs may be jointly filtered, and performance of channel estimation is further ensured.

In one possible implementation manner of the first aspect, the CORESET associates two first PDCCH candidates that are adjacent in the frequency domain, and these two first PDCCH candidates are respectively referred to as a first PDCCH candidate 0 and a first PDCCH candidate 1, and a first CCE in the first PDCCH candidate 0 and a first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or a second CCE in the first PDCCH candidate 0 and a second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain. In the possible implementation manner, CCEs corresponding to the same QCL hypothesis can be made continuous in the frequency domain as much as possible, so that signals on the multiple CCEs can be jointly filtered, and the performance of channel estimation is further ensured.

In a possible implementation manner of the first aspect, the CORESET further associates a second PDCCH candidate, where the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain; when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; alternatively, the second PDCCH candidate corresponds to the second QCL hypothesis when the CCE of the second PDCCH candidate is adjacent to the second CCE. In the possible implementation manner, CCEs corresponding to the same QCL hypothesis may be made continuous in the frequency domain as much as possible, so that signals on the multiple CCEs may be jointly filtered, and performance of channel estimation is further ensured.

In a possible implementation manner of the first aspect, when a first CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal DMRS on the third CCE employs a first QCL hypothesis; or, when the second CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE uses the second QCL hypothesis. The third CCE may belong to a PDCCH candidate allocated to other user equipment, or a REG corresponding to the third CCE is used for transmitting a PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE. In the possible implementation manner, CCEs corresponding to the same QCL hypothesis can be made continuous in the frequency domain as much as possible, so that channel estimation can be performed based on DMRSs on the multiple CCEs, the accuracy of channel estimation can be improved, and the complexity of channel estimation can be reduced.

In a possible implementation manner of the first aspect, the CORESET adopts a mapping manner of non-interleaved CCEs to REG clusters. In the possible implementation manner, CCEs corresponding to the same QCL hypothesis can be made continuous in the frequency domain as much as possible, so that signals on the multiple CCEs can be jointly filtered, and the performance of channel estimation is further ensured.

In a possible implementation of the first aspect, the mapping of the plurality of QCL hypotheses on the core set, or on the PDCCH candidate associated with the core set, is determined according to a precoding granularity of the core set.

In a possible implementation manner of the first aspect, the mapping manner of the multiple QCL hypotheses on the core set or on the PDCCH candidate associated with the core set is determined according to the interleaving manner of the core set.

In a second aspect, a method for receiving downlink control information is provided, where the method includes: receiving indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Resource Element Group (REG) cluster and a second REG cluster, or the CORESET comprises a first REG cluster and a second REG cluster; the first REG cluster and the second REG cluster are not overlapped and both comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster; and receiving downlink control information on the first REG cluster and the second REG cluster respectively according to the first QCL hypothesis and the second QCL hypothesis. Meanwhile, the technical scheme is that the QCL hypothesis mapped by taking frequency domain resources as granularity can correspond to a plurality of QCL hypotheses on a plurality of symbols of a time domain, so that joint filtering on the plurality of symbols can be realized, and the performance of channel estimation is improved.

In the above technical solution, the first PDCCH candidate associated with the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster corresponds to the first QCL hypothesis, and the second REG cluster corresponds to the second QCL hypothesis, so that the first PDCCH candidate corresponds to the two QCL hypotheses, and thus, the network device may implement the diversity gain of PDCCH transmission when sending DCI on the first PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis.

In a possible implementation manner of the second aspect, the method further includes: and receiving configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster. In the possible implementation manners, the network device may flexibly configure the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster according to requirements.

In a possible implementation manner of the second aspect, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the first PDCCH candidate; or, the CORESET adopts a mapping mode from interleaved REG clusters to a control channel element CCE, and the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by an interleaving matrix dimension mapped from the CCE to the REG clusters. In the foregoing possible implementation manner, the user equipment and the network device may determine the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster according to a predefined manner, so as to reduce signaling interaction between the user equipment and the network device.

In a possible implementation manner of the second aspect, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb-tooth shape in the frequency domain of the CORESET, which may also be referred to as that the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are alternately distributed in the frequency domain of the CORESET, each comb may include Z REG clusters, that is, multiple QCL hypotheses are alternately mapped with Z numbered consecutive REG clusters as a granularity, and a value of Z may be a positive integer. Optionally, the first REG cluster includes odd-numbered REG clusters, and the second REG cluster includes even-numbered REG clusters. Wherein, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the CORESET, and the second REG cluster includes even-numbered REG clusters in the CORESET. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes even-numbered REG clusters in the first PDCCH candidate. In the foregoing possible implementation manner, the PDCCH candidate associated with the CORESET may be made to correspond to two QCL hypotheses, so that the network device may implement diversity gain of PDCCH transmission when sending DCI on the PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis.

In a possible implementation manner of the second aspect, the precoding granularity of the CORESET is the REG cluster, that is, the precoding of the signals transmitted in the same REG cluster is the same, and/or the precoding of the signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster. In the possible implementation manner, the precoding of multiple REGs in the same REG cluster is the same, so that the signals on the multiple REGs can be jointly filtered, and the performance of channel estimation is further ensured.

In one possible implementation manner of the second aspect, the first REG cluster and the second REG cluster each include a plurality of consecutively numbered REG clusters. When the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes X numbered consecutive REG clusters in the CORESET, and the second REG cluster includes Y numbered consecutive REG clusters in the CORESET, where the number of REG clusters included in the CORESET may be (X + Y), and X and Y are positive integers. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes X 'numbered consecutive REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' numbered consecutive REG clusters in the first PDCCH candidate, where the number of REG clusters included in the first PDCCH candidate may be (X '+ Y'), and X 'and Y' are positive integers. In the possible implementation manner, the PDCCH candidate associated with the CORESET may correspond to two QCL hypotheses, so that the network device may implement diversity gain of PDCCH transmission when sending DCI on the PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis; in addition, the implementation mode can also ensure that CCEs corresponding to the same QCL hypothesis are continuous on the frequency domain as much as possible, thereby ensuring the performance of channel estimation.

In a possible implementation manner of the second aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters with continuous frequency domains in the second REG cluster is the same. This precoding scheme may also be referred to as wideband precoding, where the wideband is a frequency band comprised by a plurality of consecutive REG clusters. In the possible implementation manner, the precoding of the multiple consecutive REG clusters is the same, so that the REG clusters corresponding to the same QCL hypothesis are consecutive in the frequency domain as much as possible, and thus, the signals on the multiple REG clusters can be jointly filtered, thereby ensuring the performance of channel estimation.

In one possible implementation manner of the second aspect, when a first REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal DMRS on the third REG adopts a first QCL hypothesis; or, when a second REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG cluster adopts a second QCL assumption. The third REG cluster may belong to PDCCH candidates allocated to other user equipments, or the third REG cluster is used for transmitting PDCCHs of other user equipments, or no DCI transmission is allocated on the third REG cluster. In the possible implementation manner, REG clusters corresponding to the same QCL hypothesis can be made continuous in the frequency domain as much as possible, so that channel estimation can be performed based on DMRSs on the multiple REG clusters, thereby improving the accuracy of channel estimation and reducing the complexity of channel estimation.

In a possible implementation of the second aspect, the mapping of the plurality of QCL hypotheses on the CORESET or on the PDCCH candidate associated with the CORESET is determined according to the precoding granularity of the CORESET.

In a possible implementation manner of the second aspect, the mapping manner of the multiple QCL hypotheses on the core set or on the PDCCH candidate associated with the core set is determined according to the interleaving manner of the core set.

In a third aspect, a method for sending downlink control information is provided, where the method includes: transmitting indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, or the CORESET comprises the first CCE and the second CCE; the first CCE and the second CCE both comprise one or more CCEs, the numbers of the first CCE and the second CCE are different, the first QCL is supposed to correspond to the first CCE, and the second QCL is supposed to correspond to the second CCE; and transmitting downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis respectively.

In a possible implementation manner of the third aspect, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb shape in the frequency domain of the CORESET, which may also be referred to as that the CCEs in the first CCE and the CCEs in the second CCE are alternately distributed in the frequency domain of the CORESET, each comb may include W CCEs, that is, a plurality of QCL hypotheses are alternately mapped with W numbered consecutive CCEs as a granularity, and a value of W may be a positive integer. Optionally, the first CCE includes odd-numbered CCEs, and the second CCE includes even-numbered CCEs. When the CORESET comprises a first CCE and a second CCE, the first CCE comprises odd-numbered CCEs in the CORESET, and the second CCE comprises even-numbered CCEs in the CORESET. When the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes odd-numbered CCEs in the first PDCCH candidate, and the second CCE includes even-numbered CCEs in the first PDCCH candidate.

In a possible implementation manner of the third aspect, the precoding granularity of the CORESET is a resource element group REG cluster, that is, precoding of signals transmitted in the same REG cluster is the same, and/or precoding of signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In one possible implementation manner of the third aspect, the first CCE includes M consecutive CCEs, the second CCE includes N consecutive CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). When the CORESET comprises the first CCE and the second CCE, the first CCE comprises M numbered consecutive CCEs in the CORESET, and the second CCE comprises N numbered consecutive CCEs in the CORESET, where the number of CCEs included in the CORESET may be (M + N). When the CORESET is associated with a first PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M CCEs numbered consecutively in the first PDCCH candidate, and the second CCE includes N CCEs numbered consecutively in the first PDCCH candidate, where the number of CCEs included in the first PDCCH candidate may be (M + N).

In a possible implementation manner of the third aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same. This type of precoding scheme may also be referred to as wideband precoding, where the size of the wideband is the frequency band included in a plurality of consecutive REG clusters.

In a possible implementation manner of the third aspect, the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level in a plurality of PDCCH candidates associated with the core set, where the predetermined aggregation level may be set in advance, configured by a network device, or the like, for example, a value of the predetermined aggregation level may be 4, 8, or 16. Optionally, the first PDCCH candidate is a PDCCH candidate with the largest aggregation level among PDCCH candidates associated with the CORESET.

In a possible implementation manner of the third aspect, the CORESET associates two first PDCCH candidates adjacent in the frequency domain, where the two first PDCCH candidates are respectively referred to as a first PDCCH candidate 0 and a first PDCCH candidate 1, and a first CCE in the first PDCCH candidate 0 and a first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or a second CCE in the first PDCCH candidate 0 and a second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

In a possible implementation manner of the third aspect, the CORESET further associates a second PDCCH candidate, where the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain; when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; alternatively, the second PDCCH candidate corresponds to the second QCL hypothesis when the CCE of the second PDCCH candidate is adjacent to the second CCE.

In a possible implementation manner of the third aspect, when a first CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal DMRS on the third CCE employs a first QCL hypothesis; or, when the second CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis. The third CCE may belong to a PDCCH candidate allocated to other user equipment, or a REG corresponding to the third CCE is used for transmitting a PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

In a possible implementation manner of the third aspect, the CORESET adopts a mapping manner of non-interleaved CCEs to REG clusters.

In a fourth aspect, a method for sending downlink control information is provided, where the method includes: transmitting indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Resource Element Group (REG) cluster and a second REG cluster, or the CORESET comprises a first REG cluster and a second REG cluster; the first REG cluster and the second REG cluster are not overlapped and both comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster; and respectively sending downlink control information on the first REG cluster and the second REG cluster according to the first QCL hypothesis and the second QCL hypothesis.

In one possible implementation manner of the fourth aspect, the method further includes: and transmitting configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.

In a possible implementation manner of the fourth aspect, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the first PDCCH candidate; or, the CORESET adopts a mapping mode from interleaved REG clusters to Control Channel Elements (CCEs), and the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by the interleaving matrix dimension mapped from CCEs to REG clusters.

In a possible implementation manner of the fourth aspect, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb-tooth shape in the frequency domain of the CORESET, which may also be referred to as that the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are alternately distributed in the frequency domain of the CORESET, each comb may include Z REG clusters, that is, multiple QCL hypotheses are alternately mapped with Z numbered consecutive REG clusters as a granularity, and a value of Z may be a positive integer. Optionally, the first REG cluster includes odd-numbered REG clusters, and the second REG cluster includes even-numbered REG clusters. When the CORESET comprises a first REG cluster and a second REG cluster, the first REG cluster comprises the odd-numbered REG cluster in the CORESET, and the second REG cluster comprises the even-numbered REG cluster in the CORESET. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes even-numbered REG clusters in the first PDCCH candidate.

In a possible implementation manner of the fourth aspect, the precoding granularity of the CORESET is an REG cluster, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In a possible implementation manner of the fourth aspect, the first REG cluster and the second REG cluster each include a plurality of REG clusters with consecutive numbers. When the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes X numbered consecutive REG clusters in the CORESET, and the second REG cluster includes Y numbered consecutive REG clusters in the CORESET, where the number of REG clusters included in the CORESET may be (X + Y), and X and Y are positive integers. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes X 'numbered consecutive REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' numbered consecutive REG clusters in the first PDCCH candidate, where the number of REG clusters included in the first PDCCH candidate may be (X '+ Y'), and X 'and Y' are positive integers.

In a possible implementation manner of the fourth aspect, the multiple REG clusters that are continuous in frequency domain within the first REG cluster are precoded the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same. This precoding scheme may also be referred to as wideband precoding, where the wideband is a frequency band comprised by a plurality of consecutive REG clusters.

In a possible implementation manner of the fourth aspect, when a first REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal DMRS on the third REG adopts a first QCL hypothesis; or, when a second REG cluster in the first PDCCH candidate is adjacent to a third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG cluster adopts the second QCL hypothesis. The third REG cluster may belong to PDCCH candidates allocated to other user equipments, or the third REG cluster is used for transmitting PDCCHs of other user equipments, or no DCI transmission is allocated on the third REG cluster.

In a fifth aspect, a downlink control information receiving apparatus is provided, where the apparatus includes: a receiving unit, configured to receive indication information of a control resource set, CORESET, where the indication information is used to indicate a first QCL hypothesis and a second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, or the CORESET comprises the first CCE and the second CCE; the first CCE and the second CCE both comprise one or more CCEs, and the numbers of the first CCE and the second CCE are different, the first QCL is supposed to correspond to the first CCE, and the second QCL is supposed to correspond to the second CCE; a receiving unit, further configured to receive downlink control information on the first CCE and the second CCE according to the first QCL assumption and the second QCL assumption, respectively.

In a possible implementation manner of the fifth aspect, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb shape in the frequency domain of the CORESET, which may also be referred to as that the CCEs in the first CCE and the CCEs in the second CCE are alternately distributed in the frequency domain of the CORESET, each comb may include W CCEs, that is, a plurality of QCL hypotheses are alternately mapped with W numbered consecutive CCEs as a granularity, and a value of W may be a positive integer. Optionally, the first CCE includes odd-numbered CCEs, and the second CCE includes even-numbered CCEs. When the CORESET comprises a first CCE and a second CCE, the first CCE comprises odd-numbered CCEs in the CORESET, and the second CCE comprises even-numbered CCEs in the CORESET. When the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes odd-numbered CCEs in the first PDCCH candidate, and the second CCE includes even-numbered CCEs in the first PDCCH candidate.

In a possible implementation manner of the fifth aspect, the precoding granularity of the CORESET is a resource element group REG cluster, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In one possible implementation manner of the fifth aspect, the first CCE includes M numbered consecutive CCEs, the second CCE includes N numbered consecutive CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). When the CORESET comprises the first CCE and the second CCE, the first CCE comprises M numbered consecutive CCEs in the CORESET, and the second CCE comprises N numbered consecutive CCEs in the CORESET, where the number of CCEs included in the CORESET may be (M + N). When the CORESET associates with the first PDCCH candidate, where the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M CCEs with consecutive numbers in the first PDCCH candidate, and the second CCE includes N CCEs with consecutive numbers in the first PDCCH candidate, where the number of CCEs included in the first PDCCH candidate may be (M + N).

In a possible implementation manner of the fifth aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same. This type of precoding scheme may also be referred to as wideband precoding, where the size of the wideband is the frequency band included in a plurality of consecutive REG clusters.

In a possible implementation manner of the fifth aspect, the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level among a plurality of PDCCH candidates associated with the core set, where the predetermined aggregation level may be set in advance, or configured by a network device, and the like, for example, a value of the predetermined aggregation level may be 4, 8, or 16. Optionally, the first PDCCH candidate is a PDCCH candidate with the largest aggregation level among PDCCH candidates associated with the CORESET.

In a possible implementation manner of the fifth aspect, the CORESET associates two first PDCCH candidates adjacent in the frequency domain, where the two first PDCCH candidates are respectively referred to as a first PDCCH candidate 0 and a first PDCCH candidate 1, and a first CCE in the first PDCCH candidate 0 and a first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or a second CCE in the first PDCCH candidate 0 and a second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

In a possible implementation manner of the fifth aspect, the CORESET further associates a second PDCCH candidate, and the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain; when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; alternatively, the second PDCCH candidate corresponds to the second QCL hypothesis when the CCE of the second PDCCH candidate is adjacent to the second CCE.

In one possible implementation manner of the fifth aspect, when the first CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal DMRS on the third CCE employs a first QCL hypothesis; or when a second CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE employs a second QCL hypothesis.

In one possible implementation manner of the fifth aspect, the CORESET adopts a mapping manner of non-interleaved CCEs to REG clusters.

In a sixth aspect, an apparatus for receiving downlink control information is provided, the apparatus including: a receiving unit, configured to receive indication information of a control resource set, which is used to indicate a first QCL hypothesis and a second QCL hypothesis; the first PDCCH candidate comprises a first Resource Element Group (REG) cluster and a second REG cluster, the first REG cluster and the second REG cluster are not overlapped and comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster; and the receiving unit is further configured to receive downlink control information on the first REG cluster and the second REG cluster respectively according to the first QCL hypothesis and the second QCL hypothesis. The third CCE may belong to a PDCCH candidate allocated to other user equipment, or a REG corresponding to the third CCE is used for transmitting a PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

In a possible implementation manner of the sixth aspect, the receiving unit is further configured to: and receiving configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.

In a possible implementation manner of the sixth aspect, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively half of the number of REG clusters in the first PDCCH candidate; or, the CORESET adopts a mapping mode from interleaved REG clusters to Control Channel Elements (CCEs), and the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by the interleaving matrix dimension from CCE to REG cluster mapping.

In one possible implementation manner of the sixth aspect, the first REG cluster includes odd-numbered REG clusters, and the second REG cluster includes even-numbered REG clusters.

In a possible implementation manner of the sixth aspect, the precoding granularity of the CORESET is a REG cluster.

In a possible implementation manner of the sixth aspect, the first REG cluster and the second REG cluster each include a plurality of REG clusters with consecutive numbers.

In a possible implementation manner of the sixth aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same.

In a possible implementation manner of the sixth aspect, when a first REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal DMRS on the third REG adopts a first QCL hypothesis; or, when a second REG cluster in the first PDCCH candidate is adjacent to a third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG cluster adopts the second QCL hypothesis. Wherein the third REG cluster may belong to PDCCH candidates allocated to other user equipments, or the third REG cluster is used for transmitting PDCCHs of other user equipments, or no DCI transmission is allocated on the third REG cluster.

A seventh aspect provides a downlink control information transmitting apparatus, including: a transmitting unit, configured to transmit indication information of a control resource set, the indication information indicating the first QCL hypothesis and the second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Resource Element Group (REG) cluster and a second REG cluster, or the CORESET comprises a first REG cluster and a second REG cluster; the first CCE and the second CCE both comprise one or more CCEs, the numbers of the first CCE and the second CCE are different, the first QCL is supposed to correspond to the first CCE, and the second QCL is supposed to correspond to the second CCE; and the transmitting unit is further configured to transmit downlink control information on the first CCE and the second CCE, respectively, according to the first QCL hypothesis and the second QCL hypothesis.

In a possible implementation manner of the seventh aspect, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb-tooth shape in the frequency domain of the CORESET, which may also be referred to as the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are alternately distributed in the frequency domain of the CORESET, each comb may include Z REG clusters, that is, multiple QCL hypotheses are alternately mapped by using Z numbered consecutive REG clusters as a granularity, and a value of Z may be a positive integer. Optionally, the first REG cluster includes odd-numbered REG clusters, and the second REG cluster includes even-numbered REG clusters. Wherein, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the CORESET, and the second REG cluster includes even-numbered REG clusters in the CORESET. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes even-numbered REG clusters in the first PDCCH candidate.

In a possible implementation manner of the seventh aspect, the precoding granularity of the CORESET is a resource element group REG cluster, that is, precoding of signals transmitted in the same REG cluster is the same, and/or precoding of signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In one possible implementation manner of the seventh aspect, the first CCE includes M numbered consecutive CCEs, the second CCE includes N numbered consecutive CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). When the CORESET includes the first CCE and the second CCE, the first CCE includes M numbered consecutive CCEs in the CORESET, and the second CCE includes N numbered consecutive CCEs in the CORESET, where the number of CCEs included in the CORESET may be (M + N). When the CORESET associates with the first PDCCH candidate, where the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M CCEs with consecutive numbers in the first PDCCH candidate, and the second CCE includes N CCEs with consecutive numbers in the first PDCCH candidate, where the number of CCEs included in the first PDCCH candidate may be (M + N).

In a possible implementation manner of the seventh aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same. This precoding scheme may also be referred to as wideband precoding, where the wideband is a frequency band comprised by a plurality of consecutive REG clusters.

In a possible implementation manner of the seventh aspect, the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level in a plurality of PDCCH candidates associated with the core set, where the predetermined aggregation level may be set in advance, or configured by a network device, and the like, for example, a value of the predetermined aggregation level may be 4, 8, or 16. Optionally, the first PDCCH candidate is a PDCCH candidate with the largest aggregation level among PDCCH candidates associated with the CORESET.

In a possible implementation manner of the seventh aspect, the CORESET associates two first PDCCH candidates that are adjacent in the frequency domain, where the two first PDCCH candidates are respectively referred to as a first PDCCH candidate 0 and a first PDCCH candidate 1, and a first CCE in the first PDCCH candidate 0 and a first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or a second CCE in the first PDCCH candidate 0 and a second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

In a possible implementation manner of the seventh aspect, the CORESET further associates a second PDCCH candidate, and the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain; when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; alternatively, when a CCE of a second PDCCH candidate is adjacent to a second CCE, the second PDCCH candidate corresponds to a second QCL hypothesis.

In a possible implementation manner of the seventh aspect, when the first CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal DMRS on the third CCE employs the first QCL hypothesis; or, when the second CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis. The third CCE may belong to a PDCCH candidate allocated to other user equipment, or a REG corresponding to the third CCE is used for transmitting a PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

In a possible implementation manner of the seventh aspect, the CORESET employs a mapping manner from non-interleaved CCEs to REG clusters.

In an eighth aspect, there is provided a downlink control information transmitting apparatus, including: a transmitting unit, configured to transmit indication information of a control resource set, CORESET, where the indication information is used to indicate the first QCL hypothesis and the second QCL hypothesis; wherein the CORESET associates with the first PDCCH candidate and the first PDCCH candidate comprises a first Resource Element Group (REG) cluster and a second REG cluster, or the CORESET comprises a first REG cluster and a second REG cluster; the first REG cluster and the second REG cluster are not overlapped and both comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster; and a sending unit, further configured to send downlink control information on the first REG cluster and the second REG cluster according to the first QCL hypothesis and the second QCL hypothesis, respectively.

In a possible implementation manner of the eighth aspect, the sending unit is further configured to: and transmitting configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.

In a possible implementation manner of the eighth aspect, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the first PDCCH candidate; or, the CORESET adopts a mapping mode from interleaved REG clusters to Control Channel Elements (CCEs), and the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by the interleaving matrix dimension mapped from CCEs to REG clusters.

In a possible implementation manner of the eighth aspect, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb-tooth shape in the frequency domain of the CORESET, which may also be referred to as that the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are alternately distributed in the frequency domain of the CORESET, each comb may include Z REG clusters, that is, multiple QCL hypotheses are alternately mapped with Z numbered consecutive REG clusters as a granularity, and a value of Z may be a positive integer. Optionally, the first REG cluster includes odd-numbered REG clusters, and the second REG cluster includes even-numbered REG clusters. Wherein, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the CORESET, and the second REG cluster includes even-numbered REG clusters in the CORESET. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes even-numbered REG clusters in the first PDCCH candidate.

In a possible implementation manner of the eighth aspect, the precoding granularity of the CORESET is the REG cluster, that is, the precoding of the signals transmitted in the same REG cluster is the same, and/or the precoding of the signals transmitted in different REG clusters is different. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In a possible implementation manner of the eighth aspect, the first REG cluster and the second REG cluster each include a plurality of REG clusters with consecutive numbers. When the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes X numbered consecutive REG clusters in the CORESET, and the second REG cluster includes Y numbered consecutive REG clusters in the CORESET, where the number of REG clusters included in the CORESET may be (X + Y), and X and Y are positive integers. When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes X 'numbered consecutive REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' numbered consecutive REG clusters in the first PDCCH candidate, where the number of REG clusters included in the first PDCCH candidate may be (X '+ Y'), and X 'and Y' are positive integers.

In a possible implementation manner of the eighth aspect, the precoding of multiple REG clusters that are consecutive in frequency domain within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same. This precoding scheme may also be referred to as wideband precoding, where the wideband is a frequency band comprised by a plurality of consecutive REG clusters.

In a possible implementation manner of the eighth aspect, when a first REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal DMRS on the third REG adopts a first QCL hypothesis; or, when a second REG cluster in the first PDCCH candidate is adjacent to a third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG cluster adopts the second QCL hypothesis. Wherein the third REG cluster may belong to PDCCH candidates allocated to other user equipments, or the third REG cluster is used for transmitting PDCCHs of other user equipments, or no DCI transmission is allocated on the third REG cluster.

A ninth aspect provides a downlink control information receiving apparatus, which may be a user equipment or a chip in the user equipment, and includes a processor, and may further include a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected through the bus, and the memory stores instructions, and when the processor executes the instructions, the apparatus is caused to execute the downlink control information receiving method provided in the first aspect or any possible implementation manner of the first aspect.

A tenth aspect provides a downlink control information receiving apparatus, which may be a user equipment or a chip in the user equipment, and includes a processor, and may further include a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected through the bus, and the memory stores instructions, and when the processor executes the instructions, the apparatus is caused to execute the downlink control information receiving method provided in any possible implementation manner of the second aspect or the second aspect.

In an eleventh aspect, a downlink control information sending apparatus is provided, where the apparatus may be a network device or a chip in the network device, and the apparatus includes a processor, and may further include a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected through the bus, and the memory stores instructions, and when the processor executes the instructions, the apparatus is caused to execute the downlink control information sending method provided in any possible implementation manner of the third aspect or the third aspect.

In a twelfth aspect, a downlink control information sending apparatus is provided, which may be a network device or a chip in a network device, and includes a processor, and may further include a memory, a communication interface, and a bus, where the processor, the memory, and the communication interface are connected through the bus, and the memory stores instructions, and when the processor executes the instructions, the apparatus is caused to execute the downlink control information sending method provided in any possible implementation manner of the fourth aspect or the fourth aspect.

In yet another aspect of the present application, there is provided a communication system comprising a user equipment and a network device; the user equipment is the downlink control information receiving apparatus provided in any possible implementation manner of the fifth aspect or the fifth aspect, or the ninth aspect, and is configured to execute the downlink control information receiving method provided in any possible implementation manner of the first aspect or the first aspect; the network device is any one of the seventh aspect, any possible implementation manners of the seventh aspect, or the downlink control information sending apparatus provided in the eleventh aspect, and is configured to execute the downlink control information sending method provided in any one of the third aspect or any possible implementation manners of the third aspect.

In yet another aspect of the present application, there is provided a communication system comprising a user equipment and a network device; the user equipment is the downlink control information receiving apparatus provided in any possible implementation manner of the sixth aspect, or the tenth aspect, and is configured to execute the downlink control information receiving method provided in any possible implementation manner of the second aspect or the second aspect; the network device is the downlink control information transmitting apparatus provided in any one of the above-mentioned eighth aspect, possible implementation manners of the eighth aspect, or the twelfth aspect, and is configured to execute the downlink control information transmitting method provided in any one of the above-mentioned fourth aspect, or possible implementation manners of the fourth aspect.

In a further aspect of the present application, a computer-readable storage medium is provided, where instructions are stored in the computer-readable storage medium, and when the instructions are executed on a device, the instructions cause the device to perform the method for receiving downlink control information provided in the first aspect or any one of the possible implementation manners of the first aspect.

In a further aspect of the present application, a computer-readable storage medium is provided, which stores instructions that, when executed on a device, cause the device to execute the downlink control information receiving method provided by the second aspect or any one of the possible implementation manners of the second aspect.

In a further aspect of the present application, a computer-readable storage medium is provided, where instructions are stored, and when the instructions are executed on a device, the device is caused to execute the downlink control information sending method provided in the third aspect or any one of the possible implementation manners of the third aspect.

In a further aspect of the present application, a computer-readable storage medium is provided, where instructions are stored, and when the instructions are executed on a device, the device is caused to execute the downlink control information sending method provided by the fourth aspect or any one of the possible implementation manners of the fourth aspect.

In a further aspect of the present application, a computer program product is provided, which, when run on a device, causes the device to execute the method for receiving downlink control information provided in the first aspect or any one of the possible implementations of the first aspect.

In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to execute the downlink control information receiving method provided by the second aspect or any one of the possible implementations of the second aspect.

In a further aspect of the present application, a computer program product is provided, which, when running on an apparatus, causes the apparatus to execute the downlink control information transmitting method provided in any one of the above third aspect or the possible implementation manners of the third aspect.

In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to execute the downlink control information transmitting method provided in the fourth aspect or any one of the possible implementation manners of the fourth aspect.

It can be understood that the apparatus for receiving downlink control information, the sending method and apparatus corresponding to the receiving method, the computer readable storage medium, and the computer program product provided above all include all the features of the downlink control information receiving method provided above, and therefore, the beneficial effects achieved by the apparatus can refer to the beneficial effects in the corresponding method provided above, and are not described herein again.

Drawings

Fig. 1 is a schematic diagram of CORESET provided in an embodiment of the present application;

fig. 2 is a schematic diagram of a PDCCH candidate associated with CORESET according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of CCEs in CORESET according to an embodiment of the present application;

fig. 4 is a schematic diagram of CCEs in another CORESET provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another communication system according to an embodiment of the present application;

fig. 7 is a flowchart illustrating a downlink control information transmission method according to an embodiment of the present application;

fig. 8 is a schematic diagram of a CORESET and a first PDCCH candidate according to an embodiment of the present disclosure;

fig. 9 is a schematic diagram of another CORESET and a first PDCCH candidate according to an embodiment of the present application;

fig. 10 is a schematic diagram of a PDCCH candidate according to an embodiment of the present application;

fig. 11 is a schematic diagram of another PDCCH candidate provided in the embodiment of the present application;

fig. 12 is a schematic diagram of another PDCCH candidate provided in the embodiment of the present application;

fig. 13 is a schematic diagram of a PDCCH candidate and a third CCE provided in an embodiment of the present application;

fig. 14 is a flowchart illustrating another downlink control information transmission method according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a downlink control information receiving apparatus according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of another downlink control information receiving apparatus according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a downlink control information transmitting apparatus according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of another downlink control information transmitting apparatus according to an embodiment of the present application.

Detailed Description

In the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b and c can be single or multiple. In addition, the embodiments of the present application use the words "first", "second", etc. to distinguish between similar items or items having substantially the same function or effect. For example, the first threshold and the second threshold are only used for distinguishing different thresholds, and the sequence order of the thresholds is not limited. Those skilled in the art will appreciate that the words "first," "second," and the like do not limit the number or order of execution.

It is noted that the words "exemplary" or "such as" are used herein to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

Before describing the embodiments of the present application, the related terms referred to in the embodiments of the present application will be described below.

Quasi co-location (QCL) assumption of a signal is used to characterize large scale characteristics of the channel experienced by the signal from the transmission end to the reception end, the large scale characteristics including at least: doppler shift, doppler spread, delay spread, average delay, and spatial rx parameter.

Wherein, the doppler frequency offset can be understood as: because there is an angle between the moving direction of the receiving end and the signal arrival direction, the signal generates doppler frequency offset, for example, the frequency when the signal is sent out is fc, and the frequency of the received signal is (fc +/-fd) due to the movement of the receiving end, and fd is the doppler frequency offset. Doppler spread can be understood as: the signal propagation experiences a scattering path, which causes the frequency band of the signal transmission to spread out of band at the receiving end, resulting in doppler spread. The delay spread can be understood as: a pulse signal sent by a sending end not only contains the signal itself, but also contains signals at various time delay points in a signal received by a receiving end, which can cause the time width of the signal to expand. The average delay can be understood as: the average time delay of the signal after the signal passes through the multipath channel and reaches the receiving end. The spatial reception parameters may be understood as: a beamforming (digital weighted sum) scheme (digital weighted sum) is adopted for a transmission signal at a transmitting end, so that the transmission signal has a characteristic of directional transmission in space, a beamforming scheme corresponding to the transmission beamforming can be adopted at a receiving end to improve the performance of the reception signal, and the reception beamforming information is space reception parameter information. The network device may configure a Transmission Control Indication (TCI) state, which includes a QCL type and an index value of a reference signal under the type. The TCI status indicates that, in the QCL type, the reference signal and the DMRS port have a QCL association relationship, that is, the QCL hypothesis of the DMRS port can be obtained according to the reference signal. For example, in the TCI state, when QCL type a is configured, reference signal ID1 and DMRS port have a quasi-co-located association relationship, and when QCL type D is configured, reference signal ID2 and DMRS port have a quasi-co-located association relationship, the user equipment may receive DMRS according to the QCL hypothesis under QCL type a and the QCL hypothesis under QCL type D obtained by reference signal ID 1. The reference signal configured in the TCI state may be a channel state information reference signal (CSI-RS), a Tracking Reference Signal (TRS), a cell common reference signal, or the like.

Wherein the QCL type (type) includes QCL type a, QCL type B, QCL type C, and QCL type D. QCL assumptions corresponding to QCL type a include doppler shift, doppler spread, delay spread, and average delay. QCL hypothesis for QCL type B includes doppler shift and doppler spread. QCL assumptions corresponding to QCL type C include doppler shift and average delay. The QCL hypothesis corresponding to QCL type D includes spatial reception parameters and spatial reception beamforming parameters of the DMRS port. Taking QCL type a as an example, if a QCL type a relationship exists between the DMRS port and the reference signal port 1, the doppler frequency offset, doppler spread, delay spread, and average delay of the DMRS port are determined according to the reference signal port 1, for example, the user equipment performs signal processing according to the reference signal port 1 to determine the relevant parameters included in the QCL type a, and the above parameters of the DMRS port are the same as or have a corresponding relationship with the above parameters of the reference signal port 1. In addition, if a QCL type D relationship exists between the DMRS port and the reference signal port, the spatial reception parameter and the spatial reception beamforming parameter of the DMRS port are determined according to the reference signal port. It should be understood that the reception beam information of the respective reference signals satisfying the QCL type D relationship is the same, and the reception beam of the data channel is the same as the reception beam of the DMRS, that is, based on the QCL relationship and the reception beam information of the reference signals, the user equipment may infer the reception beam employed for receiving the data channel and the DMRS.

A control resource set (CORESET) represents all time-frequency physical resources for carrying Downlink Control Information (DCI), that is, CORESET refers to a resource pool configured by a base station for carrying DCI, or a candidate physical resource set for carrying DCI. Exemplarily, the number of Resource Blocks (RBs) occupied by the CORESET in the frequency domain is an integral multiple of 6, and may occupy a plurality of continuous or discontinuous RBs, the position information configuring the CORESET to occupy the RBs may be indicated by a bitmap (bitmap), and may occupy continuous 1 to 3 OFDM symbols in the time domain, and the number of specifically occupied OFDM symbols may be configured by the base station. As shown in fig. 1, taking the example that the frequency domain resource bandwidth includes 18 RBs (respectively represented as RB0-RB17), the locations of RBs occupied by three CORESET are illustrated, which are respectively represented as CORESET1, CORESET2, and CORESET 3. In fig. 1, CORESET1 occupies 12 consecutive RBs, RB0-RB11, respectively; CORESET2 occupies 12 discontinuous RBs, RB1-RB6 and RB11-RB16 respectively; the CORESET3 occupies 6 RBs in the partial frequency domain resource bandwidth, the 6 RBs being RB0-RB5, respectively.

In addition, information such as QCL hypothesis information signaled on the physical resource, a scrambling ID of the DMRS on the physical resource, and a precoding scheme (including a wideband precoding scheme and a subband precoding scheme) is also configured in CORESET. The wideband precoding scheme is that the same beamforming is used for all resources on the CORESET, or the same beamforming is used for all resources on the CORESET that are continuous in frequency domain or time domain. The beamforming refers to a process of configuring a transmitting end or a receiving end of multiple antennas to generate directional transmitting or receiving beams by controlling the phase and amplitude of each transmitting antenna.

A Physical Downlink Control Channel (PDCCH) candidate refers to a physical resource location corresponding to each DCI detection by a User Equipment (UE), and may also be understood as a basic granularity for blind DCI detection by the UE, that is, one PDCCH candidate corresponds to one DCI detection or one DCI detection process, where the DCI detection process may refer to performing operations such as parsing, decoding, and deciding on information bits. The number of PDCCH candidates represents the complexity of DCI detection by the UE or the overhead of DCI processing resources. The UE blind detection capability may be defined by the number of PDCCH candidates on one fractional bandwidth in one carrier. As shown in table 1 below, the maximum detection number of PDCCH candidates for several different subcarrier spacings is listed, wherein the smaller the subcarrier spacing, the larger the maximum detection number.

TABLE 1

Subcarrier spacing (kHz)	Maximum number of detections of PDCCH candidates
15	44
30	36
60	22
120	20

Meanwhile, another measure of the UE blind detection complexity is the complexity of channel estimation. One metric method is characterized by the number of non-overlapped (non-overlapped) CCEs in a part of bandwidth in one carrier, as shown in table 2, it can be understood that PDCCH candidates under different aggregation levels may occupy part of the same CCEs, but the channel estimation processing is performed only once on the part of the same CCEs, but the channel estimation processing is performed on different CCEs.

TABLE 2

Subcarrier spacing (kHz)	Maximum number of non-overlapping CCEs
15	56

30	56
60	48
120	32

The size and position of the physical resource corresponding to each PDCCH candidate in the CORESET may be determined by an Aggregation Level (AL) corresponding to the PDCCH candidate and a number of a Control Channel Element (CCE) included in the PDCCH candidate.

AL is used to characterize the number of time-frequency resources occupied by one PDCCH candidate, for example, the value of AL is the number of CCEs, and the candidate value of AL is: {1, 2, 4, 8, 16}, DCI may be transmitted with a larger AL to increase reliability when channel conditions are poor, and DCI may be transmitted with a smaller AL to save resource overhead when channel conditions are poor. One or more PDCCH candidates may be configured for each AL, and different PDCCH candidates for the AL may not overlap with each other on physical resources or include CCEs with different numbers. The PDCCH candidates under different AL independently determine the included CCEs according to an agreed manner. For example, for a set s of search spaces associated with CORESET with number p, for a time slot

Medium carrier indicator value n _CI (if carrier indication is not supported, n _CI 0) corresponding to the aggregation level L

The CCE numbers included are:

wherein, for PDCCH candidates in one cell common search space set,

for a PDCCH candidate in a particular search space set s, this parameter is determined according to the CORESET number. N is a radical of _CCE,p Is the number of CCEs included in the CORESET p, the number of the CCEs being from 0 to N in the CORESET in sequence _CCE,p -1；

Is the number of PDCCH candidates at aggregation level L configured in a particular search space set s. Alternatively to this, the first and second parts may,

is at aggregation level L configured in a specific search space set s under all carrier indications

Maximum value of (d); n is _RNTI Is the scrambling code value of the DCI.

According to the above exemplary preset rule, the CCE number included in each PDCCH candidate may be determined, and since each specific CCE number corresponds to a specific physical resource, the CCE included in each PDCCH candidate may be used to characterize an actual physical resource location occupied by each PDCCH candidate in CORESET. As shown in fig. 2, assuming that the CORESET includes 8 CCEs (denoted as CCE0-CCE7, respectively), the CORESET may include 7 PDCCH candidates, 4PDCCH candidates with AL equal to 2, 2PDCCH candidates with AL equal to 4, and 1 PDCCH candidate with AL equal to 8. In fig. 2, PDCCH candidates of 4 AL ═ 2 are denoted AL2PDCCH candidate 0, AL2PDCCH candidate 1, AL2PDCCH candidate 2, and AL2PDCCH candidate 3, respectively, and the corresponding CCEs are CCE0-CCE1, CCE2-CCE3, CCE4-CCE5, and CCE6-CCE7, respectively; PDCCH candidates with 2 AL ═ 4 are respectively denoted as AL4PDCCH candidate 0 and AL4PDCCH candidate 1, and the corresponding CCEs are CCE0-CCE3 and CCE4-CCE 7; PDCCH candidates with 1 AL — 8 are denoted as AL8PDCCH candidate 0, and the corresponding CCEs are CCE0-CCE7, respectively.

Wherein one CCE includes 6 Resource Element Groups (REGs). REGs are basic physical resource units of a control channel, each REG includes 1 RB in the frequency domain, 1 OFDM symbol in the time domain, and REGs in one CORESET are numbered sequentially from the time domain to the frequency domain. Multiple REGs with consecutive numbers may form one REG cluster (REG bundle), and the multiple REG clusters are sequentially numbered according to the occupied frequency domain position on the CORESET. There is a corresponding relationship between each CCE number and REG cluster for determining the actual physical resource location of each CCE, and specifically there may be two corresponding relationships, that is, a non-interleaved (non-interleaved) and an interleaved (interleaved) corresponding relationship.

Non-interleaved: each CCE includes, in order of small to large number, one or more REG clusters from a lower frequency domain location to a higher frequency domain location (in the existing protocol, it is supported that each CCE includes 1 to 3 REG clusters, each CCE includes 6 REGs, and the REG clusters are 2, 3, or 6 REGs in size). The REG clusters included by each CCE do not overlap, i.e., numbered adjacent CCEs include adjacent physical resources. As shown in fig. 3, the CORESET includes 24 REGs (0 to 23 in fig. 3 represent the numbers of REGs), and 6 REGs are one REG cluster, so the CORESET can be divided into 4 CCEs, and each CCE corresponds to one REG cluster in turn, which are represented as CCE0-CCE3 and respectively correspond to REG cluster 0-REG cluster 3 in fig. 3, and the CORESET is described by taking an example that the CORESET occupies one OFDM symbol in the time domain.

And (3) interweaving: each CCE includes one or more REG clusters, and the number of the plurality of REG clusters is non-consecutive. Among other things, the protocol predefines the rules of interleaving so that the base station and the UE can determine the actual physical resources that each CCE includes. Specifically, an interlace matrix is generated: a variable R represents the row number of the interleaving matrix, a variable H represents the column number of the interleaving matrix, R H (indicates a multiplication number) is the number of all REG clusters included in CORESET, and the serial numbers of the REG clusters are sequentially mapped to each interleaving matrix element according to the sequence of the front row and the rear column, for example, the serial number of the REG cluster corresponding to the a row and the b column in the interleaving matrix is a H + b; according to the interleaving matrix, the mapping relationship between CCEs and REG clusters can be further determined, for example, each CCE may sequentially take elements of the interleaving matrix according to the sequence of the preceding column and the following column, the element taken by one CCE according to the sequence corresponds to the REG cluster included by the CCE, for example, the first CCE takes the element of the first column in the interleaving matrix, and the second CCE takes the element of the first column in the interleaving matrix. An example of a manner of interleaving: number of symbols included in CORESET

L ∈ {2,6}, number of symbols

Then the following formula is satisfied for REG cluster f (x) among the REG clusters included by each CCE:

wherein x ═ cR + R, R ═ 0,1, …, R-1, C ═ 0,1, …, C-1,

R∈{2,3,6}。

as shown in fig. 4, it is assumed that the interleaving matrix has 3 rows R and 8 columns H, and reference numerals 0 to 23 in fig. 4 denote REG clusters sequentially arranged in one CORESET. For example, if the size of the REG cluster is 2 REGs, then 8 CCEs (i.e., CCE0 to CCE7) are obtained according to the above mapping relationship, where the CCE0 includes REG clusters {0, 8, 16}, the CCE1 includes REG clusters {1, 9, 17}, … …, and the CCE7 includes REG clusters {7, 15, 23}, specifically as shown in fig. 4 (a), only the REG cluster included in CCE0 is shown in the figure; if the size of the REG cluster is 6 REGs, 24 CCEs (namely CCE0 to CCE23) are obtained according to the above mapping relationship, and the CCEs 0 to CCE23 respectively include

REG clusters

0, 8, 16, 1, 9, 17, …, 7, 15, and 23, specifically, as shown in fig. 4 (b), only REG clusters respectively included in CCE0 to CCE2 are shown in the figure.

The technical scheme provided by the application can be applied to various communication systems or communication scenes. For example, a multi-TRP DCI transmission technology is introduced on the basis of an existing communication system, a 4G communication system, a 5G communication system, a future evolution system, or a multiple communication fusion system. In a possible embodiment, the technical solution provided in the present application may also be applied to a Frequency Division Duplex (FDD) system and a Time Division Duplex (TDD) system. The technical solution provided by the present application may include various application scenarios, for example, in scenarios of homogeneous networks and heterogeneous networks, and further, for example, scenarios such as machine-to-machine (M2M), D2M, macro-micro communication, enhanced mobile internet (eMBB), ultra-high reliability and ultra-low latency communication (urlcc), and massive internet of things communication (mtc). In a possible embodiment, the technical solution provided by the present application may also be applied to a low frequency communication scenario or a high frequency communication scenario. In another possible embodiment, the technical solution provided by the present application may also be applied to a single TRP scenario, or a multiple TRP scenario, and any scenario derived from the single TRP scenario or the multiple TRP scenarios.

The embodiment of the present application provides a system architecture of a communication system, which includes a network device 100 and a user device 200. In this communication system, the network apparatus 100 transmits information (e.g., downlink control information DCI) to the user equipment 200 through a downlink channel (e.g., Physical Downlink Control Channel (PDCCH)) and the user equipment 200 transmits information to the network apparatus 100 through an uplink channel (e.g., Physical Uplink Control Channel (PUCCH)).

In one possible embodiment, as shown in FIG. 5, network device 100 may include a network device 110 and at least two network devices 120. The network device 110 has a scheduling function, and may be used to manage and allocate network resources, etc.; at least two network devices 120 have forwarding functionality and are operable to forward communication information between network device 110 and user device 200. Fig. 5 illustrates an example in which at least two network devices 120 include two network devices 120.

In another possible embodiment, as shown in fig. 6, the network device 100 may include a baseband processing unit (BBU) and at least two Remote Radio Heads (RRHs), where the at least two RRHs are operable to forward communication information sent by the BBU to the user device 200. Fig. 6 illustrates an example where at least two RRHs include two RRHs (i.e., RRH1 and RRH 2).

The network device 100 may include an evolved Node B (evolved Node B, nodeB, eNB, or e-nodeB) in a Long Term Evolution (LTE) system or an LTE-advanced (LTE-a) system, a next generation Node B (next generation Node B, gNB) in a 5G New Radio (NR) system (also referred to as an NR system), or a centralized unit (central unit, CU) and a distributed unit (distributed unit, DU) in a Cloud radio access network (Cloud RAN) system. In an embodiment, the network device 100 may be a base station in a cellular network, and may also be a first type base station or a second type base station in a relay network. In another embodiment, the network device 100 may include a macro base station, a micro base station, a small base station, a relay station, an access point, a primary cell, a secondary cell, and the like. In yet another embodiment, the network device 100 may also be a macro base station, a micro base station, a small base station, a relay station, an access point, a different base station or cell of the primary cell and the secondary cell.

User device 200 may be any terminal device capable of communicating with network device 100. For example, the user equipment 200 may be an access terminal, mobile station, remote station, roadside station, remote terminal, mobile device, terminal, User Equipment (UE), UE unit, UE station, UE terminal, wireless communication device, UE agent, or UE device, etc. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G network or a terminal in a future evolved Public Land Mobile Network (PLMN), etc.

Fig. 7 is a flowchart illustrating a DCI transmission method according to an embodiment of the present application, where the method may be applied to the communication system shown in fig. 5 or fig. 6, and the method includes the following steps.

S301: the network device transmits CORESET indication information, which is used for indicating the first QCL hypothesis and the second QCL hypothesis.

S302: the user equipment receives indication information of CORESET, wherein the indication information is used for indicating the first QCL hypothesis and the second QCL hypothesis. Optionally, the first QCL hypothesis and the second QCL hypothesis associate the CORESET.

Optionally, the indication information of the CORESET may be sent through Radio Resource Control (RRC) signaling, or may be configured to configure a plurality of QCL hypotheses through RRC signaling, and then activate a first QCL hypothesis and a second QCL hypothesis for the CORESET from the plurality of QCL hypotheses through media access control element (MAC CE) signaling.

In the embodiment of the present application, the CORESET in the two steps S301 and S302 may adopt a mapping manner from non-interlaced CCEs to REG clusters (corresponding english: CCE to REG mapping), or may adopt a mapping manner from interlaced CCEs to REG clusters, which is not limited in the embodiment of the present application. The CORESET may include a first CCE and a second CCE; alternatively, the CORESET associates a first PDCCH candidate, which includes a first CCE and a second CCE (illustrated in fig. 7 by way of example). Here, the physical resources corresponding to the first CCE and the second CCE do not overlap and each include one or more CCEs, the first QCL is assumed to correspond to the first CCE, and the second QCL is assumed to correspond to the second CCE.

Optionally, the first CCE and the second CCE include CCEs with different numbers.

Herein, the first CCE may refer to one or more CCEs corresponding to the first QCL hypothesis, and the first CCE may also be referred to as a first CCE aggregation or a first CCE group. The second CCE may refer to one or more CCEs corresponding to a second QCL hypothesis, and may also be referred to as a second CCE set or a second CCE group.

In addition, the first CCE and the second CCE do not overlap may specifically mean that the REG corresponding to the first CCE does not overlap with the REG corresponding to the second CCE. For example, as shown in fig. 3, the first CCE includes a CCE0 (corresponding REG numbers 0 to 5) and a CCE1 (corresponding REG numbers 6 to 11), the second CCE includes a CCE2 (corresponding REG numbers 12 to 17) and a CCE3 (corresponding REG numbers 18 to 23), and the first CCE and the second CCE do not overlap may specifically mean that REGs numbered 0 to 11 and REGs numbered 12 to 23 do not overlap.

Specifically, the network device or the user equipment may first determine that a first CCE included in the CORESET corresponds to a first QCL hypothesis, and a second CCE corresponds to a second QCL hypothesis; and determining one or more PDCCH candidates associated with the CORESET, so that the QCL hypothesis corresponding to the CCE in the one or more PDCCH candidates is determined. Alternatively, the network device or the user equipment may first determine one or more PDCCH candidates associated with the CORESET; for any one of the one or more PDCCH candidates, it is determined that the first CCE included in the PDCCH candidate corresponds to the first QCL hypothesis, and the second CCE corresponds to the second QCL hypothesis.

In one possible embodiment, the first QCL hypothesis and the second QCL hypothesis belong to the same QCL type. Specifically, the first QCL hypothesis and the second QCL hypothesis are both QCL type a, or the first QCL hypothesis and the second QCL hypothesis are both QCL type D.

The following description is made for the positions of the first CCE and the second CCE in the CORESET or the first PDCCH candidate.

The CCE numbering referred to hereinafter is a CCE numbering obtained when all CCEs included in the CORESET are numbered as a whole, and for example, if the CORESET includes 100 CCEs, the 100 CCEs may have numbering from 0 to 99 in order.

In the first embodiment, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb-like manner in the frequency domain in the CORESET, and may also be referred to as that the CCEs in the first CCE and the CCEs in the second CCE are alternately distributed in the frequency domain in the CORESET. When the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb shape, each comb may include W CCEs, for example, a value of W may be 1 or 2, and the like, which is not specifically limited in this embodiment of the application, where taking W as 2 indicates that a plurality of QCL hypotheses are alternately mapped with two CCEs with consecutive numbers as a granularity.

In one possible implementation, the first CCE includes odd-numbered CCEs and the second CCE includes even-numbered CCEs.

Specifically, when the CORESET includes a first CCE and a second CCE, the first CCE includes odd-numbered CCEs in the CORESET, and the second CCE includes even-numbered CCEs in the CORESET. For example, as shown in fig. 8, the CORESET includes 8 CCEs, and the corresponding numbers are sequentially 0 to 7, so that the first CCE includes CCEs numbered 1, 3, 5, and 7, and the second CCE includes CCEs numbered 0, 2, 4, and 6. For the sake of convenience of distinction, in fig. 8, the CCE number is denoted by CCEi (i takes a value of 0 to 7), the REG cluster numbers are denoted by codes 0 to 15, and the number of REGs included in each REG cluster is exemplified by 3.

When the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes odd-numbered CCEs in the first PDCCH candidate, and the second CCE includes even-numbered CCEs in the first PDCCH candidate. For example, as shown in fig. 8, the CORESET includes 8 CCEs, corresponding numbers are sequentially 0 to 7, the first PDCCH candidate includes CCEs coded to 0-3, the first CCE includes CCEs numbered 1 and 3, and the second CCE includes CCEs numbered 0 and 2.

Fig. 8 (a) illustrates an example in which the mapping from CCE to REG cluster in the CORESET is non-interleaved, and fig. 8 (b) illustrates an example in which the mapping from CCE to REG cluster in the CORESET is interleaved.

Optionally, when the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb shape, the precoding granularity of CORESET may be REG clusters, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different. In this way, the precoding of multiple REGs within the same REG cluster is the same, so that the signals on these multiple REGs can be jointly filtered. This precoding scheme may also be referred to as sub-band precoding, where the size of a sub-band is a frequency band included in one REG cluster.

In practical applications, when the CCE in the first CCE and the CCE in the second CCE are distributed in a comb shape, precoding of a plurality of CCEs consecutive within the first CCE may be the same, and/or precoding of a plurality of CCEs consecutive within the second CCE may be the same. Such a precoding scheme may be referred to as a wideband precoding scheme, or may be referred to as that the precoding granularity of the CORESET is wideband, that is, signals transmitted in consecutive frequency domain resources in the CORESET adopt the same precoding.

In a second embodiment, the first CCE includes M numbered consecutive CCEs and the second CCE includes N numbered consecutive CCEs. The values of M and N may be equal or unequal, which is not specifically limited in the embodiments of the present application.

Specifically, when the CORESET includes a first CCE and a second CCE, the first CCE includes M CCEs numbered consecutively in the CORESET, and the second CCE includes N CCEs numbered consecutively in the CORESET, where the number of CCEs included in the CORESET may be (M + N). When the CORESET associates with the first PDCCH candidate, where the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M CCEs with consecutive numbers in the first PDCCH candidate, and the second CCE includes N CCEs with consecutive numbers in the first PDCCH candidate, where the number of CCEs included in the first PDCCH candidate may be (M + N).

For example, as shown in fig. 9, the CORESET includes 8 CCEs, and the corresponding numbers are 0 to 7 in sequence. When the CORESET includes a first CCE and a second CCE, if the values of M and N are both 4, the first CCE may include CCEs numbered 0 to 3, and the second CCE may include CCEs numbered 4 to 7, or the first CCE may include CCEs numbered 4 to 7, and the second CCE may include CCEs numbered 0 to 3. When the first PDCCH candidate includes a first CCE and a second CCE, assuming that the first PDCCH candidate includes CCEs encoded as 0 to 3 of 8 CCEs, and values of M and N are both 2, the first CCE may include CCEs numbered 0 and 1, and the second CCE may include CCEs numbered 2 and 3, or the first CCE may include CCEs numbered 2 and 3, and the second CCE may include CCEs numbered 0 and 1.

Optionally, when the first CCE includes M CCEs with consecutive numbers and the second CCE includes N CCEs with consecutive numbers, precoding of a plurality of CCEs consecutive within the first CCE may be the same, and/or precoding of a plurality of CCEs consecutive within the second CCE may be the same. Such a precoding scheme may be referred to as a wideband precoding scheme, or may be referred to as that the precoding granularity of the CORESET is wideband, that is, signals transmitted in consecutive frequency domain resources in the CORESET adopt the same precoding. In this way, precoding of a plurality of CCEs consecutive within the first CCE or the second CCE is the same, and thus signals on the plurality of CCEs can be jointly filtered.

Of course, when the first CCE includes M CCEs with consecutive numbers and the second CCE includes N CCEs with consecutive numbers, the precoding granularity of the CORESET may also be an REG cluster, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different, which is not specifically limited in this embodiment of the present invention.

Optionally, the number of actual non-overlapped (non-overlapped) CCEs is determined according to the number of QCL hypotheses actually corresponding to the CCEs. Specifically, the CORESET associates a first PDCCH candidate and a second PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, the first CCE includes M1 CCEs with consecutive numbers in the first PDCCH candidate, the second CCE includes N1 CCEs with consecutive numbers in the first PDCCH candidate, the second PDCCH candidate includes a third CCE and a fourth CCE, the third CCE includes M2 CCEs with consecutive numbers in the second PDCCH candidate, and the fourth CCE includes N2 CCEs with consecutive numbers in the second PDCCH candidate. If the aggregation levels of the first PDCCH candidate and the second PDCCH candidate are different, it may happen that partial CCEs of the first PDCCH candidate and the second PDCCH candidate overlap, and the overlapping CCEs correspond to different QCL hypotheses, at this time, each CCE of the overlapping portion should be marked as two non-overlapping CCEs when determining the blind detection complexity of the DCI.

Further, the CORESET may associate a plurality of PDCCH candidates, which may include PDCCH candidates of a plurality of different aggregation levels. For example, as shown in fig. 2, the CORESET associates 7 PDCCH candidates, specifically including AL8PDCCH candidate 0 with aggregation level of 8, AL4PDCCH candidate 0 and AL4PDCCH candidate 1 with aggregation level of 4, AL2PDCCH candidate 0, AL2PDCCH candidate 1, AL2PDCCH candidate 2, and AL2PDCCH candidate 3 with aggregation level of 2.

In one possible implementation, the first PDCCH candidate may be a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level among a plurality of PDCCH candidates associated with the CORESET. The predetermined aggregation level may be set in advance, or configured by a network device, for example, a value of the predetermined aggregation level may be 4, 8, or 16, which is not specifically limited in this embodiment of the application.

Optionally, the first PDCCH candidate is a PDCCH candidate with the largest aggregation level among PDCCH candidates associated with the CORESET.

For example, if the predetermined aggregation level is 4, and PDCCH candidates with an aggregation level greater than or equal to 4 in the plurality of PDCCH candidates associated with the CORESET include AL8PDCCH candidate 0, AL4PDCCH candidate 0, and AL4PDCCH candidate 1, a first PDCCH candidate in the plurality of PDCCH candidates may be AL8PDCCH candidate 0, AL4PDCCH candidate 0, or AL4PDCCH candidate 1. In determining the first CCE and the second CCE in the manner provided in the second embodiment, as shown in fig. 10, the first CCE in AL8PDCCH candidate 0 may include CCE0-CC3, the second CCE may include CCE4-CCE7, the first CCE in AL4PDCCH candidate 0 may include CCE0-CCE1, the second CCE may include CCE2-CCE3, and the first CCE in AL4PDCCH candidate 1 may include CCE4-CC5, and the second CCE may include CCE6-CCE 7.

In another possible implementation, the CORESET may associate two first PDCCH candidates that are adjacent in the frequency domain, where the first CCEs of the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs of the two first PDCCH candidates are adjacent in the frequency domain. For convenience of description, it is assumed hereinafter that the two first PDCCH candidates are PDCCH candidate 0 and PDCCH candidate 1, respectively.

Optionally, the two first PDCCH candidates are adjacent in the frequency domain but do not overlap.

Among the two first PDCCH candidates, the levels of PDCCH candidate 0 and PDCCH candidate 1 may be the same or different, for example, the aggregation levels of PDCCH candidate 0 and PDCCH candidate 1 are both 8, or the aggregation level of PDCCH candidate 0 is 8 and the aggregation level of PDCCH candidate 1 is 4.

In addition, of the two first PDCCH candidates, the number of CCEs included in the first CCE in PDCCH candidate 0 and the number of CCEs included in the first CCE in PDCCH candidate 1 may be the same or different, and/or the number of CCEs included in the second CCE in PDCCH candidate 0 and the number of CCEs included in PDCCH candidate 1 may also be the same or different. Assuming that the number of first CCEs included in PDCCH candidate 0 is M1, the number of second CCEs included in PDCCH candidate 0 is N1, and the number of first CCEs included in PDCCH candidate 1 is M2, and the number of second CCEs included in PDCCH candidate 1 is N2, M1 and M2 may be equal or unequal, and N1 and N2 may also be equal or unequal.

Specifically, the first CCE in the two first PDCCH candidates is adjacent in the frequency domain, which may mean that the first CCE in PDCCH candidate 0 is adjacent to the first CCE in PDCCH candidate 1 in the frequency domain. For example, as shown in fig. 11 (a), if PDCCH candidate 0 and PDCCH candidate 1 are AL4PDCCH candidate 0 and AL4PDCCH candidate 1 with aggregation level 4, respectively, where a first CCE in AL4PDCCH candidate 0 includes CCE2-CCE3, a second CCE includes CCE0-CCE1, and a first CCE in AL4PDCCH candidate 1 includes CCE4-CCE5, and a second CCE includes CCE6-CCE7, the first CCE in PDCCH candidate 0 and the first CCE in PDCCH candidate 1 may specifically mean that CCE2-CCE3 and CCE4-CCE5 are adjacent in the frequency domain.

Likewise, the second CCE in the two first PDCCH candidates being adjacent in the frequency domain may mean that the second CCE in PDCCH candidate 0 is adjacent to the second CCE in PDCCH candidate 1 in the frequency domain. For example, as shown in fig. 11 (b), if PDCCH candidate 0 and PDCCH candidate 1 are AL4PDCCH candidate 0 and AL4PDCCH candidate 1 with aggregation level 4, respectively, where a first CCE in AL4PDCCH candidate 0 includes CCE0-CCE1, a second CCE includes CCE2-CCE3, and a first CCE in AL4PDCCH candidate 1 includes CCE6-CCE7, and a second CCE includes CCE4-CCE5, the second CCE in PDCCH candidate 0 and the second CCE in PDCCH candidate 1 may specifically mean that CCE2-CCE3 and CCE4-CCE5 are adjacent in the frequency domain.

Optionally, two adjacent PDCCHs in one CORESET are respectively denoted as PDCCH candidate 1 and PDCCH candidate 2, a partial CCE included in PDCCH candidate 1 (hereinafter referred to as a first partial CCE) and a partial CCE included in PDCCH candidate 2 (hereinafter referred to as a second partial CCE) are adjacent and correspond to the same QCL hypothesis, QCL hypotheses corresponding to the rest of CCEs included in PDCCH candidate 1 except for the first partial CCE are different from QCL hypotheses corresponding to the first partial CCE, and QCL hypotheses corresponding to the rest of CCEs included in PDCCH candidate 2 except for the second partial CCE are different from QCL hypotheses corresponding to the second partial CCE.

Therefore, CCEs corresponding to the same QCL hypothesis can be continuous on the frequency domain as much as possible, the number of sampling points for frequency domain filtering during channel estimation is ensured, and the performance of channel estimation is further ensured.

In another possible implementation manner, the plurality of PDCCH candidates associated with the CORESET further includes a second PDCCH candidate, and the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain. When the CCE of the second PDCCH candidate is adjacent to the first CCE in the first PDCCH candidate, the second PDCCH candidate corresponds to the first QCL hypothesis; alternatively, the second PDCCH candidate corresponds to the second QCL hypothesis when the CCE of the second PDCCH candidate is adjacent to the second CCE in the first PDCCH candidate.

For example, as shown in fig. 12, the first PDCCH candidate is AL0PDCCH candidate 0 with an aggregation level of 8, the first CCE includes CCE0-CCE3, the second CCE includes CCE4-CCE7 in AL8PDCCH candidate 0, the second PDCCH candidate is AL4PDCCH candidate 2 with an aggregation level of 4, AL4PDCCH candidate 2 includes CCE8-CCE11, and CCE8-CCE11 is adjacent to CCE4-CCE7 in the frequency domain, so that the second PDCCH candidate corresponds to the second QCL hypothesis, and may be referred to as the second PDCCH candidate only including the second CCE.

In another possible implementation, the CORESET further includes a third CCE, and the third CCE does not belong to any PDCCH candidate. That the third CCE does not belong to any PDCCH candidate may be understood as: the third CCE does not belong to any PDCCH candidate allocated to the user equipment, or the REG corresponding to the third CCE is not used for transmitting the PDCCH set by the user. For example, the third CCE may belong to a PDCCH candidate allocated to other user equipment, or a REG corresponding to the third CCE is used for transmitting a PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

Wherein, when a first CCE in the first PDCCH candidate is adjacent to a third CCE in a frequency domain, a demodulation reference signal (DMRS) on the third CCE adopts a first QCL hypothesis; alternatively, when the second CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, the DMRS on the third CCE employs the second QCL hypothesis. At this time, the CORESET may adopt a mapping manner of non-interleaved CCEs to REG clusters.

For example, as shown in fig. 13 (a), the first PDCCH candidate is AL8PDCCH candidate 0 with an aggregation level of 8, and the first CCE includes CCE8 to CCE11 and the second CCE includes CCE12 to 15 in AL8PDCCH candidate 0. If the third CCE includes CCE6-CCE7 and is adjacent to the first CCE in AL8PDCCH candidate 0 in the frequency domain, the DMRS on CCE6-CCE7 assumes the first QCL hypothesis; if the third CCE includes CCE16-CCE17 and is adjacent to the second CCE in AL8PDCCH candidate 0 in the frequency domain, the DMRS on CCE16-CCE17 adopts a second QCL hypothesis.

For another example, as shown in fig. 13 (b), the two first PDCCH candidates include AL8PDCCH candidate 0 and AL8PDCCH candidate 1 having an aggregation level of 8, the first CCE in AL8PDCCH candidate 0 includes CCE8-CCE11, the second CCE includes CCE12-15, and the first CCE in AL8PDCCH candidate 1 includes CCE28-CCE31, and the second CCE includes CCE24-CCE 27. If the third CCE includes CCE0-CCE7 and is adjacent in the frequency domain to the first CCE in AL8PDCCH candidate 0, the DMRS on CCE0-CCE7 assumes the first QCL hypothesis; if the third CCE includes CCE16-CCE23 and is adjacent in the frequency domain to the second CCE in AL8PDCCH candidate 0, while also being adjacent in the frequency domain to the second CCE in AL8PDCCH candidate 1, the DMRS on CCE16-CCE23 assumes the second QCL hypothesis.

In one possible embodiment, the mapping of multiple QCL hypotheses on the CORESET, or on PDCCH candidates associated with the CORESET, is determined according to the precoding granularity of the CORESET.

Specifically, when the precoding granularity of the CORESET is the REG cluster, the QCLs assume to be alternately mapped on the CORESET or the PDCCH candidates associated with the CORESET. For example, the first CCE and the second CCE on the CORESET comprise odd-numbered REG clusters and even-numbered REG clusters in the CORESET, respectively; or, the first CCE and the second CCE on the PDCCH candidate associated with the CORESET respectively include a part of odd-numbered REG clusters and a part of even-numbered REG clusters in the CORESET.

Specifically, when the precoding granularity of the CORESET is a wideband, or when the same precoding is adopted for REG clusters with consecutive numbers in the CORESET, multiple QCL hypotheses are mapped in a centralized manner on the CORESET or PDCCH candidates associated with the CORESET. For example, the first CCE and the second CCE on the CORESET respectively include at least one group of multiple REG clusters with consecutive numbers in the CORESET and do not overlap with each other; the first CCE and the second CCE on the PDCCH candidate associated with the CORESET respectively comprise at least one group of multiple REG clusters with continuous numbers in the CORESET and do not overlap with each other. For example, the first CCE and the second CCE each include one-half of the number of consecutive REG clusters as compared to the number of all REG clusters in the CORESET, or one-half of the number of all REG clusters in the PDCCH candidate.

In one possible embodiment, the mapping of multiple QCL hypotheses on the core set or on the PDCCH candidate associated with the core set is determined according to the interleaving of the core set. Specifically, when the CCE-to-REG cluster mapping scheme of the CORESET adopts a non-interleaved mapping scheme, the number of REG clusters included in the first CCE and the number of REG clusters included in the second CCE are respectively one-half of the number of all REG clusters in the CORESET. When the mapping manner from CCE to REG cluster of the CORESET adopts an interleaving mapping manner, the first CCE and the second CCE each include at least two groups of REG clusters with consecutive numbers, and the number of REG clusters in each group may be one fourth of the number of REG clusters in the CORESET.

In this embodiment of the present application, in each of the several possible implementation manners, multiple frequency domain resources that are continuous as much as possible may correspond to the same QCL hypothesis, so that the user equipment may perform channel estimation on the multiple continuous frequency domain resources only once, so as to reduce complexity of channel estimation.

S303: the network device transmits the DCI on the first CCE and the second CCE according to the first QCL assumption and the second QCL assumption, respectively.

When the network device sends the DCI to the user equipment, the network device sends the DCI to the user equipment by using the one PDCCH candidate associated with the CORESET to carry the one DCI.

One PDCCH candidate is used to carry one complete DCI, which may include the following two ways. First, the coded DCI information bits are mapped on all time-frequency resources occupied by one PDCCH candidate according to a mapping sequence of time domain first and frequency domain later, frequency domain first and time domain later, or frequency domain interleaved. The method for receiving the DCI on the PDCCH candidate by the user equipment is to obtain all information bits carried on the PDCCH candidate, and uniformly enter a decoder to be sequentially mapped to the bits of the decoder. And secondly, mapping the coded DCI information bits on a first CCE of one PDCCH candidate according to a mapping sequence of interleaving of a time domain and a frequency domain, or a frequency domain and a time domain, and mapping the same DCI information bits on a second CCE of the PDCCH candidate according to the same mapping sequence. The method for the user equipment to receive the DCI on the PDCCH candidate is to respectively acquire information bits carried on the first CCE and the second CCE on the PDCCH candidate, and respectively enter a decoder to be sequentially mapped to the bit positions of the decoder, and the user equipment needs to perform soft combining on the information acquired from the first CCE and the second CCE, that is, the acquired likelihood values are sequentially added.

Specifically, when the CORESET associates with a first PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, and the first QCL is assumed to correspond to the first CCE, and the second QCL is assumed to correspond to the second CCE, the network device sends DCI on the first PDCCH candidate includes: and the network equipment sends first DCI on a first CCE in the first PDCCH candidates according to the first QCL hypothesis, and sends second DCI on a second CCE in the first PDCCH candidates according to the second QCL hypothesis, wherein the DCI comprises the first DCI and the second DCI.

For example, taking the network device in the communication system shown in fig. 5 as an example, if the first network device 120 adopts the first QCL assumption and the second network device 120 adopts the second QCL assumption, the network device 110 sends the first DCI to the first network device 120, sends the second DCI to the second network device 120, sends the first DCI to the user equipment on the first CCE in the first PDCCH candidate by the first network device 120, and sends the second DCI to the user equipment on the second CCE in the first PDCCH candidate by the second network device 120.

For another example, taking the network device in the communication system shown in fig. 6 as an example, if RRH1 adopts the first QCL assumption and RRH2 adopts the second QCL assumption, the network device transmits the first DCI on the first CCE in the first PDCCH candidate through RRH1, and transmits the second DCI on the second CCE in the first PDCCH candidate through RRH 2.

Optionally, when the CORESET is further associated with a second PDCCH candidate, if the second PDCCH candidate corresponds to the first QCL hypothesis, the network device sends DCI on the second PDCCH candidate according to the first QCL hypothesis; if the second PDCCH candidate corresponds to the second QCL hypothesis, the network device sends the DCI on the second PDCCH candidate according to the second QCL hypothesis.

S304: the user equipment receives the DCI on the first CCE and the second CCE according to the first QCL assumption and the second QCL assumption, respectively.

Specifically, when the CORESET associates with a first PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, and the first QCL is assumed to correspond to the first CCE, and the second QCL is assumed to correspond to the second CCE, the receiving, by the user equipment, the DCI on the first PDCCH candidate includes: and the user equipment receives first DCI on a first CCE in the first PDCCH candidates according to the first QCL hypothesis, and receives second DCI on a second CCE in the first PDCCH candidates according to the second QCL hypothesis, wherein the DCI comprises the first DCI and the second DCI. Furthermore, when the user equipment receives the first DCI and the second DCI, the user equipment may analyze the first DCI and the second DCI as a whole to obtain signaling information included in the DCI sent by the network equipment.

Optionally, the information bits included in the first DCI and the second DCI are the same, and the user equipment may analyze the first DCI and the second DCI respectively and combine the soft information to obtain signaling information included in the DCI sent by the network equipment.

Optionally, when the CORESET is further associated with a second PDCCH candidate, if the second PDCCH candidate corresponds to the first QCL hypothesis, the ue receives DCI on the second PDCCH candidate according to the first QCL hypothesis; and if the second PDCCH candidate corresponds to the second QCL hypothesis, the user equipment receives the DCI on the second PDCCH candidate according to the second QCL hypothesis. Furthermore, when the user equipment receives the DCI, the user equipment may parse the DCI to obtain the DCI delivered by the network device.

Further, if the precoding granularity of the CORESET is the REG cluster, when the user equipment receives the DCI, the user equipment may perform joint filtering on signals on multiple REGs in the same REG cluster to improve the signal-to-noise ratio of the signals on the multiple REGs. If the precoding granularity of the CORESET is wideband, when the user equipment receives the DCI, the user equipment may perform joint filtering on the signals on the multiple consecutive CCEs that use the same precoding in the CORESET, so as to improve the signal-to-noise ratio of the signals on the multiple consecutive CCEs.

Further, the CORESET further includes a third CCE, and the third CCE does not belong to any PDCCH candidate. When the first CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain and the DMRS on the third CCE uses the first QCL hypothesis, the user equipment may further receive the DMRS on the third CCE according to the first QCL hypothesis; and then, the user equipment performs channel estimation according to the DMRS on the first CCE and the DMRS on the third CCE so as to improve the performance of channel estimation. When a second CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain and the DMRS on the third CCE adopts a second QCL hypothesis, the user equipment may further receive the DMRS on the third CCE according to the second QCL hypothesis; and then, the user equipment performs channel estimation according to the DMRS on the second CCE and the DMRS on the third CCE so as to improve the performance of channel estimation.

In this embodiment of the present application, the first PDCCH candidate associated with the CORESET includes a first CCE and a second CCE, the first CCE corresponds to the first QCL hypothesis, and the second CCE corresponds to the second QCL hypothesis, so that the first PDCCH candidate corresponds to the two QCL hypotheses, and thus, the network device may implement diversity gain of PDCCH transmission when sending DCI on the first PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis. Meanwhile, the method uses QCL hypothesis mapped by taking frequency domain resources as granularity, and can correspond to a plurality of QCL hypotheses on a plurality of symbols of a time domain, thereby realizing combined filtering on the plurality of symbols and further improving the performance of channel estimation.

Fig. 14 is a flowchart illustrating another DCI transmission method according to an embodiment of the present application, where the method may be applied to the communication system shown in fig. 5 or fig. 6, and the method includes the following steps.

S401: the network device transmits CORESET indication information indicating the first QCL hypothesis and the second QCL hypothesis.

S402: the user equipment receives indication information of CORESET, wherein the indication information is used for indicating the first QCL hypothesis and the second QCL hypothesis.

In this embodiment, the CORESET in the two steps S401 and S402 may adopt a non-interleaved CCE to REG cluster mapping manner, or may adopt an interleaved CCE to REG cluster mapping manner, which is not specifically limited in this embodiment of the present application. The CORESET may include a first REG cluster and a second REG cluster; or, the CORESET associates a first PDCCH candidate, which includes a first REG cluster and a second REG cluster. Here, the first REG cluster and the second REG cluster are not overlapped and each include one or more REG clusters, the first QCL is assumed to correspond to the first REG cluster, and the second QCL is assumed to correspond to the second REG cluster.

The first REG cluster may refer to one or more REG clusters corresponding to the first QCL hypothesis, and may also be referred to as a first REG cluster Set (or a Set of REG clusters) or a first REG cluster group. The second REG cluster may refer to one or more REG clusters corresponding to the second QCL hypothesis, and may also be referred to as a second REG cluster set or a second REG cluster group. In addition, the first REG cluster and the second REG cluster do not overlap may specifically mean that one or more REG clusters included in the first REG cluster and one or more REG clusters included in the second REG cluster do not overlap, or that the number of the REG cluster included in the first REG cluster and the number of the REG cluster included in the second REG cluster are different.

Specifically, the network device or the user equipment may first determine that a first REG cluster included in the CORESET corresponds to a first QCL hypothesis, and a second REG cluster corresponds to a second QCL hypothesis; and determining one or more PDCCH candidates associated with the CORESET, so that the QCL hypothesis corresponding to the REG cluster in the one or more PDCCH candidates is determined. Alternatively, the network device or the user equipment may first determine one or more PDCCH candidates associated with the CORESET; for any one of the one or more PDCCH candidates, it is determined that a first REG cluster included in the PDCCH candidate corresponds to the first QCL hypothesis, and a second REG cluster corresponds to the second QCL hypothesis.

Next, the positions of the first REG cluster and the second REG cluster in the CORESET or the first PDCCH candidate will be described.

It should be noted that the reference to the REG cluster in the following is a reference to the REG cluster obtained when all the REG clusters included in the CORESET are numbered in an interleaving order of frequency domain first and time domain second, time domain first and frequency domain second, or frequency domain second, for example, if the CORESET includes 100 REG clusters, the reference to the 100 REG clusters may be 0 to 99 in sequence.

In embodiment 1, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in the CORESET or in the first PDCCH candidate in a comb-tooth shape, which may also be referred to as the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in the CORESET or in the first PDCCH candidate alternately. When the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb shape, each comb may include Z REG clusters, for example, Z may take a value of 1, which is not specifically limited in this embodiment of the present application.

In one possible implementation, the first REG cluster includes odd-numbered REG clusters and the second REG cluster includes even-numbered REG clusters. Specifically, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the CORESET, and the second REG cluster includes even-numbered REG clusters in the CORESET. That is, the first REG cluster includes the REG cluster numbered 2n +1 in the CORESET, and the second REG cluster includes the REG cluster numbered 2n in the CORESET, where n is an integer. For example, the CORESET includes 16 REG clusters, corresponding numbers are sequentially 0 to 15, the first REG cluster includes REG clusters numbered 1, 3, 5, 7, 9, 11, 13, and 15, and the second REG cluster includes REG clusters numbered 0, 2, 4, 6, 8, 10, 12, and 14. Specifically, when the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes odd-numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes even-numbered REG clusters in the first PDCCH candidate. That is, the first REG cluster includes a REG cluster numbered 2n +1 in the first PDCCH candidate, and the second REG cluster includes a REG cluster numbered 2n in the first PDCCH candidate, where n is an integer. For example, the CORESET includes 16 REG clusters, the corresponding numbers are sequentially 0 to 15, the first PDCCH candidate associated with the CORESET includes REG clusters coded from 0 to 7, the first REG cluster includes REG clusters numbered 1, 3, 5, and 7, and the second REG cluster includes REG clusters numbered 0, 2, 4, and 6.

Optionally, when the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb shape, the precoding granularity of the CORESET may be the REG clusters, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different. In this way, the precoding of multiple REGs within the same REG cluster is the same, so that the signals on these multiple REGs can be jointly filtered.

In one possible embodiment, the mapping of multiple QCL hypotheses on the CORESET, or on PDCCH candidates associated with the CORESET, is determined according to the precoding granularity of the CORESET. Specifically, when the precoding granularity of the CORESET is the REG cluster, the QCLs assume to be alternately mapped on the CORESET or the PDCCH candidates associated with the CORESET. For example, the first REG cluster and the second REG cluster on the CORESET include an odd-numbered REG cluster and an even-numbered REG cluster in the CORESET, respectively; the first REG cluster and the second REG cluster on the first PDCCH candidate associated with the CORESET respectively include a part of odd-numbered REG clusters and a part of even-numbered REG clusters in the CORESET.

In practical applications, when the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb-tooth shape, the precoding of multiple consecutive REG clusters within the first REG cluster may be the same, and/or the precoding of multiple consecutive REG clusters within the second REG cluster may be the same. Such a precoding scheme may be referred to as a wideband precoding scheme, or may be referred to as that the precoding granularity of the CORESET is wideband, that is, signals transmitted in consecutive frequency domain resources in the CORESET adopt the same precoding.

In embodiment 2, the first REG cluster and the second REG cluster each include at least one set of multiple REG clusters with consecutive numbers.

Specifically, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes X numbered consecutive REG clusters in the CORESET, and the second REG cluster includes Y numbered consecutive REG clusters in the CORESET, where the number of REG clusters included in the CORESET may be (X + Y). For example, the CORESET includes 16 REG clusters, the corresponding numbers are sequentially 0 to 15, if X and Y both take a value of 8, the first REG cluster may include REG clusters numbered 0 to 7, and the second REG cluster may include REG clusters numbered 8 to 15, or the first REG cluster may include REG clusters numbered 8 to 15, and the second REG cluster may include REG clusters numbered 0 to 7.

Specifically, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes K1 groups of X1 numbered consecutive REG clusters in the CORESET, the second REG cluster includes K2 groups of X2 numbered consecutive REG clusters in the CORESET, and the first REG cluster and the second REG cluster are discontinuous, and the CORESET may include (K1X 1+ K2X 2) REG clusters. For example, the CORESET includes 16 REG clusters, the corresponding numbers are sequentially 0 to 15, if the values of K1 and K2 are both 2 and the values of X1 and X2 are both 4, the first REG cluster may include REG clusters with numbers of 0 to 3 and 8 to 11, and the second REG cluster may include REG clusters with numbers of 4 to 7 and 12 to 15.

When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes X 'numbered consecutive REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' numbered consecutive REG clusters in the first PDCCH candidate, and the number of REG clusters included in the first PDCCH candidate may be (X '+ Y'). For example, the CORESET includes 16 REG clusters, the corresponding numbers are sequentially 0 to 15, the first PDCCH candidate includes REG clusters coded from 0 to 7, and if X 'and Y' both take values of 4, the first REG cluster may include REG clusters numbered from 0 to 3, and the second REG cluster may include REG clusters numbered from 4 to 7, or the first REG cluster may include REG clusters numbered from 4 to 7, and the second REG cluster may include REG clusters numbered from 0 to 3.

Specifically, when the first PDCCH candidate associated with the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes K1 groups of X1 consecutive REG clusters in the first PDCCH candidate, the second REG cluster includes K2 groups of X2 consecutive REG clusters in the first PDCCH candidate, and the first REG cluster and the second REG cluster are discontinuous, and the number of REG clusters included in the first PDCCH candidate may be (K1X 1+ K2X 2). For example, the CORESET includes 16 REG clusters and the first PDCCH candidate includes 8 REG clusters, the corresponding numbers are sequentially 0 to 7, if the values of K1 and K2 are both 2 and the values of X1 and X2 are both 2, the first REG cluster may include REG clusters numbered 0 to 1 and 4 to 5, and the second REG cluster may include REG clusters numbered 2 to 3 and 6 to 7.

Optionally, when the first REG cluster and the second REG cluster both include multiple REG clusters with consecutive numbers, the precoding of the multiple REG clusters consecutive within the first REG cluster may be the same, and/or the precoding of the multiple REG clusters consecutive within the second REG cluster may be the same. Such a precoding scheme may be referred to as a wideband precoding scheme, or may be referred to as that the precoding granularity of the CORESET is wideband, that is, signals transmitted in consecutive frequency domain resources in the CORESET adopt the same precoding. In this way, the precoding of consecutive multiple REG clusters within the first REG cluster or the second REG cluster is the same, so that the signals on these multiple REG clusters can be jointly filtered.

Of course, when the first REG cluster and the second REG cluster both include multiple REG clusters with consecutive numbers, the precoding granularity of the CORESET may also be the REG cluster, that is, the precoding of signals transmitted in the same REG cluster is the same, and/or the precoding of signals transmitted in different REG clusters is different, which is not specifically limited in this embodiment of the present invention.

In one possible implementation manner, when a first REG cluster in the first PDCCH candidates is adjacent to a third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG adopts a first QCL assumption; or, when a second REG cluster in the first PDCCH candidate is adjacent to a third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in the CORESET, the DMRS on the third REG cluster adopts the second QCL hypothesis. Wherein the third REG cluster may belong to PDCCH candidates allocated to other user equipments, or the third REG cluster is used for transmitting PDCCHs of other user equipments, or no DCI transmission is allocated on the third REG cluster.

Further, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster may be determined in the following two ways, which are specifically shown below.

In the ith manner, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are configured by the network device.

Specifically, the network device sends configuration information to the user equipment, where the configuration information is used to indicate the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster; when the user equipment receives the configuration information, the user equipment may determine the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster according to the configuration information.

Optionally, the number of groups of consecutive REG clusters included in the first REG cluster and the number of REG clusters included in each group of consecutive REG clusters are both configured by the network device.

In the ii way, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are predefined or determined in a predefined manner.

Specifically, when the CORESET includes the first REG cluster and the second REG cluster, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the CORESET; when the first PDCCH candidate includes a first REG cluster and a second REG cluster, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the first PDCCH candidate. Optionally, the number of REG clusters in the CORESET, or the number of REG clusters in the first PDCCH candidate may be configured by the network device.

Or, when the CORESET adopts an interleaving CCE to REG cluster mapping manner, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by an interleaving matrix dimension for CCE to REG cluster mapping. Specifically, a group of consecutive REG clusters includes REG clusters corresponding to one row in the interleaving matrix, the first REG cluster includes REG clusters corresponding to odd rows in the interleaving matrix, and the second REG cluster includes REG clusters corresponding to even rows in the interleaving matrix, i.e., the numbers of the REG clusters included in the first REG cluster and the second REG cluster depend on the number of rows and columns in the interleaving matrix. For example, the CORESET includes 24 REG clusters, the interleaving matrix dimension is 4 × 6, the first REG cluster includes REG clusters corresponding to the first row and the third row of the interleaving matrix, and the second REG cluster includes REG clusters corresponding to the second row and the fourth row of the interleaving matrix, i.e., the first REG cluster includes REG clusters numbered 0-5, 12-17, and the second REG cluster includes REG clusters numbered 6-11, 18-23.

In one possible embodiment, the mapping of multiple QCL hypotheses on the CORESET, or on PDCCH candidates associated with the CORESET, is determined according to the precoding granularity of the CORESET. Specifically, when the precoding granularity of the CORESET is a wideband, or the same precoding is adopted for REG clusters with consecutive numbers in the CORESET, the QCLs assume centralized mapping on the CORESET or PDCCH candidates associated with the CORESET. For example, the first REG cluster and the second REG cluster on the CORESET respectively include at least one group of multiple REG clusters with continuous numbers in the CORESET and do not overlap with each other; the first REG cluster and the second REG cluster on the PDCCH candidate associated with the CORESET respectively comprise at least one group of multiple REG clusters with continuous numbers in the CORESET and are not overlapped with each other.

In one possible embodiment, the mapping of multiple QCL hypotheses on the core set or on the PDCCH candidate associated with the core set is determined according to the interleaving of the core set. Specifically, when the CCE to REG cluster mapping manner of the CORESET is non-interleaved, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are respectively one-half of the number of all REG clusters in the CORESET. When the CCE to REG cluster mapping manner of the CORESET adopts an interleaving mapping manner, the first REG cluster and the second REG cluster each include at least two groups of REG clusters with consecutive numbers, and the number of REG clusters in each group may be one fourth of the number of all REG clusters in the CORESET.

S403: the network device transmits the DCI on the first REG cluster and the second REG cluster according to the first QCL assumption and the second QCL assumption, respectively.

When the network device sends the DCI to the user equipment, the network device sends the DCI to the user equipment by using the PDCCH candidate associated with the CORESET to carry the DCI.

Specifically, when the CORESET associates with a first PDCCH candidate, the first PDCCH candidate includes a first REG cluster and a second REG cluster, and the first QCL is assumed to correspond to the first REG cluster and the second QCL is assumed to correspond to the second REG cluster, the sending, by the network device, the DCI on the first PDCCH candidate includes: and the network equipment sends first DCI on a first REG cluster in the first PDCCH candidate according to the first QCL hypothesis, and sends second DCI on a second REG cluster in the first PDCCH candidate according to the second QCL hypothesis, wherein the DCI comprises the first DCI and the second DCI.

S404: the user equipment receives DCI on the first REG cluster and the second REG cluster according to the first QCL assumption and the second QCL assumption, respectively.

Specifically, when the CORESET associates with a first PDCCH candidate, the first PDCCH candidate includes a first REG cluster and a second REG cluster, and the first QCL hypothesis corresponds to the first REG cluster and the second QCL hypothesis corresponds to the second REG cluster, the receiving, by the user equipment, the DCI on the first PDCCH candidate includes: and the user equipment receives first DCI on a first REG cluster in the first PDCCH candidate according to the first QCL hypothesis, and receives second DCI on a second REG cluster in the first PDCCH candidate according to the second QCL hypothesis, wherein the DCI comprises the first DCI and the second DCI. Furthermore, when the user equipment receives the first DCI and the second DCI, the user equipment may analyze the first DCI and the second DCI as a whole to obtain signaling information included in the DCI sent by the network equipment.

It should be noted that all relevant contents in S303 and S304 above can also be cited to the description of S403 and S404, and the difference is only that S403 and S404 are in terms of REG cluster, and S303 and S304 are in terms of CCE. In this embodiment of the present application, the first PDCCH candidate associated with the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster corresponds to the first QCL hypothesis, and the second REG cluster corresponds to the second QCL hypothesis, so that the first PDCCH candidate corresponds to the two QCL hypotheses, and thus, the network device may implement diversity gain of PDCCH transmission when sending DCI on the first PDCCH candidate according to the first QCL hypothesis and the second QCL hypothesis. Meanwhile, the method uses QCL hypothesis mapped by taking frequency domain resources as granularity, and can correspond to a plurality of QCL hypotheses on a plurality of symbols of a time domain, thereby realizing combined filtering on the plurality of symbols and further improving the performance of channel estimation.

The above-mentioned scheme provided by the embodiments of the present application is mainly introduced from the perspective of user equipment and network equipment. It is understood that the user equipment and the network device, in order to implement the above functions, include corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art would readily appreciate that the present application is capable of being implemented as hardware or a combination of hardware and computer software for performing the exemplary network elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the user equipment and the network equipment may be divided into the functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of using an integrated unit, fig. 15 shows a schematic structural diagram of a downlink control information receiving apparatus according to an embodiment of the present application, where the apparatus, as a user equipment or a chip built in the user equipment, includes: a receiving unit 501. Further, the apparatus further comprises a processing unit 502 and a sending unit 503.

In a possible implementation manner, the receiving unit 501 may be configured to support the apparatus to perform S302 and S304 and the like in the above method embodiment. Further, processing unit 502 may be configured to enable the apparatus to perform the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL hypothesis corresponds to the first CCE, the second QCL hypothesis corresponds to the second CCE, and/or other technical processes described herein, etc., in the above method embodiments; the sending unit 503 may be used to support the apparatus to send information to the network device.

In another possible implementation manner, the receiving unit 501 may be configured to support the apparatus to perform steps of S402 and S404 in the above method embodiment, and receive configuration information. Further, the processing unit 502 may be configured to support the apparatus to perform the steps of determining the first PDCCH candidate, the first REG cluster and the second REG cluster, and determining that the first QCL hypothesis corresponds to the first REG cluster, the second QCL hypothesis corresponds to the second REG cluster in the above method embodiments, and/or other technical processes described herein, and/or the like; the sending unit 503 may be used to support the apparatus to send information to the network device.

It should be noted that all relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.

Based on the hardware implementation, the processing unit 502 in the embodiment of the present application may be a processor of the apparatus, the receiving unit 501 may be a receiver of the apparatus, the transmitting unit 503 may be a transmitter of the apparatus, and the transmitter and the receiver may be integrated together to function as a transceiver, and a specific transceiver may also be referred to as a communication interface.

As shown in fig. 16, another schematic structure diagram of a downlink control information receiving apparatus according to the foregoing embodiment provided in an embodiment of the present application is a downlink control information receiving apparatus, where the apparatus, as a user equipment or a chip built in the user equipment, includes: the processor 511 may further include a memory 512, a communication interface 513 and a bus 514, and the processor 511, the memory 512 and the communication interface 513 are connected by the bus 514.

The processor 511 is configured to control and manage the operation of the downlink control information receiving apparatus. In one possible implementation, processor 511 may be configured to enable the apparatus to perform the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL hypothesis corresponds to the first CCE, the second QCL hypothesis corresponds to the second CCE in the above-described method embodiments, and/or other processes for the techniques described herein. In another possible implementation, the processor 511 may be configured to support the apparatus to perform the steps of determining the first PDCCH candidate, the first REG cluster and the second REG cluster, and determining that the first QCL hypothesis corresponds to the first REG cluster, the second QCL hypothesis corresponds to the second REG cluster in the above method embodiments, and/or other processes for the techniques described herein.

In addition, the communication interface 513 is used to support the apparatus to communicate, for example, to support the apparatus to communicate with a network device; the memory 512 is used for storing program codes and data of the apparatus.

In the present application, the processor 511 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, a digital signal processor and a microprocessor, or the like. The bus 514 in fig. 16 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 16, but it is not intended that there be only one bus or one type of bus.

In the case of using an integrated unit, fig. 17 shows a schematic diagram of a possible structure of a downlink control information transmitting apparatus according to an embodiment of the present application, where the apparatus, as a network device or a chip built in the network device, includes: a transmission unit 601. Further, the apparatus further comprises a processing unit 602 and a receiving unit 603.

In a possible implementation manner, the sending unit 601 may be configured to support the apparatus to perform S301 and S303 and the like in the above method embodiment. Further, processing unit 602 may be configured to enable the apparatus to perform the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, determining that the first QCL hypothesis corresponds to the first CCE, determining that the second QCL hypothesis corresponds to the second CCE, and so on in the above method embodiments; the receiving unit 603 may be configured to enable the apparatus to receive information sent by the user equipment.

In another possible implementation manner, the sending unit 601 may be configured to support the apparatus to perform steps of S401 and S403 in the above method embodiment, and send configuration information; processing unit 602 may be configured to support the apparatus to perform the steps of determining the first PDCCH candidate, the first REG cluster and the second REG cluster, and determining that the first QCL hypothesis corresponds to the first REG cluster and the second QCL hypothesis corresponds to the second REG cluster in the foregoing method embodiment, and the like; the receiving unit 603 may be configured to enable the apparatus to receive information sent by the user equipment.

Based on the hardware implementation, the processing unit 602 in the embodiment of the present application may be a processor of the apparatus, the transmitting unit 601 may be a transmitter of the apparatus, the receiving unit 603 may be a receiver of the apparatus, and the transmitter and the receiver may be integrated together to function as a transceiver, and a specific transceiver may also be referred to as a communication interface.

As shown in fig. 18, a schematic diagram of another possible structure of a downlink control information transmitting apparatus according to an embodiment of the present application is shown, where the apparatus, as a network device or a chip built in the network device, includes: the processor 611, which may also include a memory 612, a communication interface 613, and a bus 614.

The processor 611 is configured to control and manage the operation of the apparatus. In one possible implementation, processor 611 may be configured to enable the apparatus to perform the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL hypothesis corresponds to the first CCE, the second QCL hypothesis corresponds to the second CCE, and/or other processes for the techniques described herein, in the above-described method embodiments. In another possible implementation, the processor 611 may be configured to support the apparatus to perform the steps of determining the first PDCCH candidate, the first REG cluster and the second REG cluster, and determining that the first QCL hypothesis corresponds to the first REG cluster, the second QCL hypothesis corresponds to the second REG cluster in the above method embodiments, and/or other processes for the techniques described herein.

In addition, the communication interface 613 may be used to support the apparatus for communication, for example, to support the apparatus for communication with other devices such as user equipment. The memory 612 may be used to store program codes and data for the apparatus, and the like.

In this application, the processor 611 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors in combination, a digital signal processor in combination with a microprocessor, and so forth. The bus 614 in fig. 18 may be a peripheral component interconnect standard (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 18, but it is not intended that there be only one bus or one type of bus.

Based on this, the embodiment of the present application further provides a communication system, where the communication system includes a user equipment and a network device; wherein, the ue is the downlink control information receiving apparatus provided in fig. 15 or fig. 16, and is configured to execute the steps of the ue in the embodiment of the method shown in fig. 7; the network device is the downlink control information sending apparatus provided in fig. 17 or fig. 18, and is configured to execute the steps of the network device in the method embodiment shown in fig. 7.

The embodiment of the application also provides another communication system, which comprises user equipment and network equipment; wherein, the ue is the downlink control information receiving apparatus provided in fig. 15 or fig. 16, and is configured to execute the steps of the ue in the embodiment of the method shown in fig. 14; the network device is the downlink control information sending apparatus provided in fig. 17 or fig. 18, and is configured to execute the steps of the network device in the method embodiment shown in fig. 14.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed.

The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium, which may include: u disk, removable hard disk, read only memory, random access memory, magnetic disk or optical disk, etc. for storing program codes. Based on such understanding, the technical solutions of the embodiments of the present application may be embodied in the form of software products, in essence, or as a part of or all of the technical solutions contributing to the prior art.

In yet another aspect of the present application, a computer-readable storage medium is provided, having stored therein instructions, which, when run on an apparatus, cause the apparatus to perform the steps of the user equipment in the method embodiment shown in fig. 7 described above. In yet another aspect of the present application, a computer-readable storage medium is provided, having stored therein instructions, which, when run on a device, cause the device to perform the steps of the network device in the method embodiment shown in fig. 7 described above.

In yet another aspect of the present application, a computer-readable storage medium is provided, having stored therein instructions, which, when run on an apparatus, cause the apparatus to perform the steps of the user equipment in the method embodiment shown in fig. 14 described above. In yet another aspect of the present application, a computer-readable storage medium is provided, which has instructions stored therein, which when run on a device, cause the device to perform the steps of the network device in the method embodiment shown in fig. 14 described above.

In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to perform the steps of the user equipment in the method embodiment illustrated in fig. 7 described above. In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to perform the steps of the user equipment in the method embodiment illustrated in fig. 14 described above.

In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to perform the steps of the network device in the method embodiment illustrated in fig. 7 described above. In a further aspect of the present application, a computer program product is provided, which, when run on an apparatus, causes the apparatus to perform the steps of the network apparatus in the method embodiment shown in fig. 14 described above.

Finally, it should be noted that: the above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A method for receiving downlink control information, the method comprising:

receiving indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, the first CCE and the second CCE each comprise one or more CCEs and the CCE numbers of the first CCE and the second CCE are different, the first QCL hypothesis corresponds to the first CCE, and the second QCL hypothesis corresponds to the second CCE;

receiving downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The method of claim 1, wherein the first CCE comprises odd-numbered CCEs and the second CCE comprises even-numbered CCEs.
The method of claim 2, wherein the precoding granularity of the CORESET is a Resource Element Group (REG) cluster.
The method of claim 1, wherein the first CCE comprises M CCEs with consecutive numbering, wherein the second CCE comprises N CCEs with consecutive numbering, and wherein the first PDCCH candidate comprises a number of CCEs of (M + N).
The method of claim 4, wherein the precoding for multiple REG clusters that are frequency-domain consecutive within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same.
The method of any one of claims 1-5, wherein the first PDCCH candidate is a PDCCH candidate having an aggregation level greater than or equal to a predetermined aggregation level among a plurality of PDCCH candidates associated with the CORESET.
The method of any of claims 1-6, wherein the CORESET associates two of the first PDCCH candidates that are adjacent in the frequency domain, wherein the first CCE of the two first PDCCH candidates is adjacent in the frequency domain, or wherein the second CCE of the two first PDCCH candidates is adjacent in the frequency domain.
The method of any of claims 1-7, wherein the CORESET further associates a second PDCCH candidate that is adjacent to the first PDCCH candidate in the frequency domain;

when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; or,

when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL hypothesis.
The method according to any of claims 1-8, wherein when the first CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal, DMRS, on the third CCE assumes the first QCL hypothesis; or,

when the second CCE in the first PDCCH candidates is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis.
The method according to any of claims 1-9, wherein the CORESET employs a non-interleaved CCE to REG cluster mapping.
A method for receiving downlink control information, the method comprising:

receiving indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first resource element group, REG, cluster and a second REG cluster, the first REG cluster and the second REG cluster are non-overlapping and each comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster;

and receiving downlink control information on the first REG cluster and the second REG cluster according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The method of claim 11, further comprising:

and receiving configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.
The method of claim 11, wherein the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster set are respectively one-half of the number of REG clusters in the first PDCCH candidate; or,

and the CORESET adopts a mapping mode from interleaved REG clusters to a Control Channel Element (CCE), and the quantity of the REG clusters contained in the first REG cluster and the quantity of the REG clusters contained in the second REG cluster are determined by the dimension of an interleaving matrix mapped from the CCE to the REG clusters.
The method of any one of claims 11-13, wherein the first REG cluster comprises odd-numbered REG clusters and the second REG cluster comprises even-numbered REG clusters.
The method of claim 14, wherein the precoding granularity of CORESET is a REG cluster.
The method of any one of claims 11-13, wherein the first and second REG clusters each comprise a plurality of consecutively numbered REG clusters.
The method of any of claims 11 to 13 or 16, characterized in that the precoding for multiple REG clusters that are frequency domain consecutive within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters with continuous frequency domains in the second REG cluster is the same.
A method for sending downlink control information is characterized in that the method comprises the following steps:

transmitting indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, the first CCE and the second CCE each comprise one or more CCEs and the CCE numbers of the first CCE and the second CCE are different, the first QCL hypothesis corresponds to the first CCE, and the second QCL hypothesis corresponds to the second CCE;

transmitting downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The method of claim 18, wherein the first CCE comprises an odd-numbered CCE and the second CCE comprises an even-numbered CCE.
The method of claim 19, wherein the precoding granularity of CORESET is a Resource Element Group (REG) cluster.
The method of claim 18, wherein the first CCE comprises M consecutive numbered CCEs, wherein the second CCE comprises N consecutive numbered CCEs, and wherein the first PDCCH candidate comprises a number of CCEs that is (M + N).
The method of claim 21, wherein precoding of multiple REG clusters that are frequency-domain consecutive within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same.
The method of any of claims 18-22, wherein the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level from among a plurality of PDCCH candidates associated with the CORESET.
The method of any of claims 18-23 wherein the CORESET associates two of the first PDCCH candidates that are adjacent in the frequency domain, wherein the first CCEs of the two first PDCCH candidates are adjacent in the frequency domain, or wherein the second CCEs of the two first PDCCH candidates are adjacent in the frequency domain.
The method of any one of claims 18-24, wherein the CORESET is further associated with a second PDCCH candidate, said second PDCCH candidate being adjacent to said first PDCCH candidate in the frequency domain;

when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; or,

when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL hypothesis.
The method of any of claims 18-25 wherein, when the first CCE in the first PDCCH candidate is adjacent in the frequency domain to a third CCE, and the third CCE does not belong to any PDCCH candidate in the CORESET, the demodulation reference signals, DMRS, on the third CCE assumes the first QCL hypothesis; or,

and when the second CCE in the first PDCCH candidates is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis.
The method of any of claims 18-26, wherein the CORESET uses a non-interleaved CCE to REG cluster mapping.
A method for sending downlink control information is characterized in that the method comprises the following steps:

transmitting indication information of a control resource set (CORESET), wherein the indication information is used for indicating a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first resource element group, REG, cluster and a second REG cluster, the first REG cluster and the second REG cluster are non-overlapping and each comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster;

and sending downlink control information on the first REG cluster and the second REG cluster respectively according to the first QCL hypothesis and the second QCL hypothesis.
The method of claim 28, further comprising:

and sending configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.
The method of claim 28, wherein the first REG cluster comprises one-half of the number of REG clusters in the first PDCCH candidate and the second REG cluster set comprises one REG cluster; or,

and the CORESET adopts a mapping mode from interleaved REG clusters to a Control Channel Element (CCE), and the quantity of the REG clusters contained in the first REG cluster and the quantity of the REG clusters contained in the second REG cluster are determined by the dimension of an interleaving matrix mapped from the CCE to the REG clusters.
The method of any one of claims 28-30, wherein the first REG cluster comprises odd-numbered REG clusters and the second REG cluster comprises even-numbered REG clusters.
The method of claim 31, wherein the precoding granularity of CORESET is a REG cluster.
The method of any one of claims 28-30, wherein the first and second REG clusters each comprise a plurality of consecutively numbered REG clusters.
The method of any one of claims 28-30 or 33, wherein the precoding for multiple REG clusters that are frequency domain consecutive within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same.
A downlink control information receiving apparatus, the apparatus comprising:

a receiving unit, configured to receive indication information of a control resource set, CORESET, where the indication information is used to indicate a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, the first CCE and the second CCE each comprise one or more CCEs and the CCE numbers of the first CCE and the second CCE are different, the first QCL hypothesis corresponds to the first CCE, and the second QCL hypothesis corresponds to the second CCE;

the receiving unit is further configured to receive downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The apparatus of claim 35, wherein the first CCE comprises odd numbered CCEs and wherein the second CCE comprises even numbered CCEs.
The apparatus of claim 36, wherein the precoding granularity of CORESET is a Resource Element Group (REG) cluster.
The apparatus of claim 35, wherein the first CCE comprises M consecutive numbered CCEs, wherein the second CCE comprises N consecutive numbered CCEs, and wherein the first PDCCH candidate comprises a number of CCEs that is (M + N).
The apparatus of claim 38, wherein precoding of multiple REG clusters that are frequency-domain consecutive within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same.
The apparatus of any of claims 35-39, wherein the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level among a plurality of PDCCH candidates associated with the CORESET.
The apparatus of any of claims 35-40, wherein the CORESET associates two of the first PDCCH candidates that are adjacent in frequency domain, wherein the first CCE of the two first PDCCH candidates is adjacent in frequency domain, or wherein the second CCE of the two first PDCCH candidates is adjacent in frequency domain.
The apparatus of any of claims 35-41, wherein the CORESET is further associated with a second PDCCH candidate that is adjacent to the first PDCCH candidate in the frequency domain;

when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; or,

when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL hypothesis.
The apparatus of any of claims 35-42, wherein when the first CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal (DMRS) on the third CCE adopts the first QCL hypothesis; or,

when the second CCE in the first PDCCH candidates is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis.
The apparatus of any of claims 35-43, wherein the CORESET employs a non-interleaved CCE to REG cluster mapping.
A downlink control information receiving apparatus, comprising:

a receiving unit, configured to receive indication information of a control resource set, CORESET, where the indication information is used to indicate a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first resource element group, REG, cluster and a second REG cluster, the first REG cluster and the second REG cluster are non-overlapping and each comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster;

the receiving unit is further configured to receive downlink control information on the first REG cluster and the second REG cluster according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The apparatus of claim 45, wherein the receiving unit is further configured to:

receiving configuration information, where the configuration information is used to indicate the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.
The apparatus of claim 45, wherein the first REG cluster comprises a number of REG clusters and the second REG cluster set comprises a number of REG clusters that is one-half of the number of REG clusters in the first PDCCH candidate, respectively; or,

the CORESET adopts a mapping mode from interleaved REG clusters to Control Channel Elements (CCEs), and the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster are determined by the dimension of an interleaving matrix mapped from CCEs to REG clusters.
The apparatus of any one of claims 45-47, wherein the first REG cluster comprises odd-numbered REG clusters and the second REG cluster comprises even-numbered REG clusters.
The apparatus of claim 48, wherein the precoding granularity of CORESET is a REG cluster.
The apparatus of any one of claims 45-47, wherein the first REG cluster and the second REG cluster each comprise a plurality of consecutively numbered REG clusters.
The apparatus of any one of claims 45 to 47 or 50, wherein precoding of multiple REG clusters that are frequency domain consecutive within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same.
A downlink control information transmitting apparatus, comprising:

a sending unit, configured to send indication information of a control resource set, CORESET, where the indication information is used to indicate a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first Control Channel Element (CCE) and a second CCE, the first CCE and the second CCE each comprise one or more CCEs and the CCE numbers of the first CCE and the second CCE are different, the first QCL hypothesis corresponds to the first CCE, and the second QCL hypothesis corresponds to the second CCE;

the transmitting unit is further configured to transmit downlink control information on the first CCE and the second CCE according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The apparatus of claim 52, wherein the first CCE comprises an odd-numbered CCE and the second CCE comprises an even-numbered CCE.
The apparatus of claim 53, wherein the precoding granularity of CORESET is a Resource Element Group (REG) cluster.
The apparatus of claim 52, wherein the first CCE comprises M CCEs with consecutive numbering, wherein the second CCE comprises N CCEs with consecutive numbering, and wherein the first PDCCH candidate comprises a number of CCEs of (M + N).
The apparatus of claim 55, wherein precoding for multiple REG clusters that are frequency-domain consecutive within the first CCE is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second CCE is the same.
The apparatus of any of claims 52-56, wherein the first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level among a plurality of PDCCH candidates associated with the CORESET.
The apparatus of any of claims 52-57, wherein the CORESET associates two of the first PDCCH candidates that are adjacent in the frequency domain, wherein the first CCE of the two first PDCCH candidates is adjacent in the frequency domain, or wherein the second CCE of the two first PDCCH candidates is adjacent in the frequency domain.
The apparatus of any of claims 52-58, wherein the CORESET further associates a second PDCCH candidate that is adjacent to the first PDCCH candidate in the frequency domain;

when the CCE of the second PDCCH candidate is adjacent to the first CCE, the second PDCCH candidate corresponds to the first QCL hypothesis; or,

when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL hypothesis.
The apparatus of any of claims 52-59, wherein when the first CCE in the first PDCCH candidate is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, a demodulation reference signal (DMRS) on the third CCE adopts the first QCL hypothesis; or,

when the second CCE in the first PDCCH candidates is adjacent to a third CCE in the frequency domain, and the third CCE does not belong to any PDCCH candidate in the CORESET, the DMRS on the third CCE adopts the second QCL hypothesis.
The apparatus of any of claims 52-60, wherein the CORESET employs a non-interleaved CCE to REG cluster mapping.
A downlink control information transmitting apparatus, comprising:

a sending unit, configured to send indication information of a control resource set, CORESET, where the indication information is used to indicate a first QCL hypothesis and a second QCL hypothesis, and the CORESET is associated with a first PDCCH candidate;

wherein the first PDCCH candidate comprises a first resource element group, REG, cluster and a second REG cluster, the first REG cluster and the second REG cluster are non-overlapping and each comprise one or more REG clusters, the first QCL hypothesis corresponds to the first REG cluster, and the second QCL hypothesis corresponds to the second REG cluster;

the sending unit is further configured to send downlink control information on the first REG cluster and the second REG cluster according to the first QCL hypothesis and the second QCL hypothesis, respectively.
The apparatus of claim 62, wherein the sending unit is further configured to:

and sending configuration information, wherein the configuration information is used for indicating the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster.
The apparatus of claim 62, wherein the first REG cluster comprises a number of REG clusters and the second REG cluster set comprises a number of REG clusters that is one-half of the number of REG clusters in the first PDCCH candidate, respectively; or,

and the CORESET adopts a mapping mode from interleaved REG clusters to a Control Channel Element (CCE), and the quantity of the REG clusters contained in the first REG cluster and the quantity of the REG clusters contained in the second REG cluster are determined by the dimension of an interleaving matrix mapped from the CCE to the REG clusters.
The apparatus of any one of claims 62-64, wherein the first REG cluster comprises odd-numbered REG clusters and the second REG cluster comprises even-numbered REG clusters.
The apparatus of claim 65, wherein the precoding granularity of CORESET is a REG cluster.
The apparatus of any one of claims 62-64, wherein the first REG cluster and the second REG cluster each comprise a plurality of consecutively numbered REG clusters.
The apparatus of any one of claims 62-64 or 67, wherein precoding of multiple REG clusters that are frequency domain consecutive within the first REG cluster is the same; and/or the precoding of a plurality of REG clusters which are continuous in frequency domain in the second REG cluster is the same.
A computer-readable storage medium storing instructions that, when executed by a computer, cause the computer to perform the method of any of claims 1-10, the method of any of claims 11-17, the method of any of claims 18-27, or the method of any of claims 28-34.