A method and apparatus for receiving and transmitting downlink control information

Abstract

The present application provides a method and apparatus for receiving and transmitting downlink control information, relating to the field of communication technologies, and is used to achieve diversity gain of PDCCH transmission. The method includes: a user equipment receives indication information of a CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; wherein, the first PDCCH candidate includes a first CCE and a second CCE, both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; the user equipment receives downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

Description

Technical Field

[0001] This application relates to the field of communication technologies, and in particular, to a method and apparatus for receiving and transmitting downlink control information. Background Art

[0002] In a wireless communication system, a base station transmits downlink control information (DCI) on some specific physical resources. A user equipment (UE) needs to determine the DCI transmitted on the specific physical resources through multiple blind detections on candidate physical resources. The meaning of DCI blind detection is: performing signal detection and decoding according to certain rules on different candidate physical resources.

[0003] Among them, the set of candidate physical resources where the DCI is located is defined as a control resource set (CORESET), and the physical resource position for each blind detection of the DCI by the UE is defined as a physical downlink control channel (PDCCH) candidate. The size and position of the physical resources corresponding to the PDCCH candidate can be determined by an aggregation level (AL) and a control channel element (CCE). The AL represents the number of CCEs occupied by a PDCCH candidate, and the actual physical resource positions occupied by each CCE with a different number in the 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. The REGs are numbered first in the time domain and then in the frequency domain. Multiple consecutively numbered REGs can be called a REG bundle. The protocol stipulates the mapping relationship between the REG bundle and each CCE number, which can be used to determine the actual physical resource position of each CCE.

[0004] To increase the reliability of DCI transmission, a method based on multiple transmission and reception points (transmission recei vDCI transmission scheme for the transmission point (TRP). In this scheme, different OFDM symbols of a PDCCH candidate correspond to different quasi co-location (QCL) assumptions. Therefore, whether diversity gain can be achieved in this scheme is limited by the number of OFDM symbols occupied by a PDCCH candidate. In addition, when the CORESET includes multiple OFDM symbols, the UE cannot perform time-domain filtering based on the demodulation reference signals (DMRS) on the multiple OFDM symbols, so the channel estimation performance cannot be improved. Summary of the Invention

[0005] This application provides a method and apparatus for receiving and transmitting downlink control information, which is used to achieve diversity gain in PDCCH transmission when transmitting DCI on a PDCCH candidate.

[0006] To achieve the above object, the embodiments of this application adopt the following technical solutions:

[0007] In a first aspect, a method for receiving downlink control information is provided. The method includes: receiving indication information of a control resource set (CORESET), where the indication information is used to indicate a first QCL assumption and a second QCL assumption; where the CORESET is associated with a first PDCCH candidate and the first PDCCH candidate includes a first control channel element (CCE) and a second CCE, or the CORESET includes the first CCE and the second CCE; both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; receiving downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0008] In the above technical solution, the first PDCCH candidate associated with the CORESET includes the first CCE and the second CCE or the CORESET includes the first CCE and the second CCE, the first CCE corresponds to the first QCL assumption, and the second CCE corresponds to the second QCL assumption. Therefore, the first PDCCH candidate corresponds to two QCL assumptions. In this way, when the network device transmits DCI on the first PDCCH candidate according to the first QCL assumption and the second QCL assumption, diversity gain in PDCCH transmission can be achieved. At the same time, this technical solution maps QCL assumptions with frequency-domain resources as the granularity, and multiple QCL assumptions can correspond to multiple symbols in the time domain, so joint filtering on multiple symbols can be achieved, thereby improving the performance of channel estimation.

[0009] In a possible implementation of the first aspect, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb-like pattern in the frequency domain of the CORESET, which can also be referred to as the CCEs in the first CCE and the CCEs in the second CCE being alternately distributed in the frequency domain of the CORESET. Each comb can include W CCEs, that is, multiple QCL assumptions are alternately mapped with W consecutively numbered CCEs as the granularity. The value of W can be a positive integer. Optionally, the first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers. Among them, when the CORESET includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the CORESET, and the second CCE includes the CCEs with even numbers in the CORESET. When the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the first PDCCH candidate, and the second CCE includes the CCEs with even numbers in the first PDCCH candidate. In the above possible implementation, the PDCCH candidate associated with the CORESET can correspond to two QCL assumptions, so that when the network device sends DCI on the PDCCH candidate according to the first QCL assumption and the second QCL assumption, the diversity gain of PDCCH transmission can be achieved.

[0010] In a possible implementation of the first aspect, the precoding granularity of the CORESET is a resource element group (REG) cluster. That is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding method can also be referred to as sub-band precoding, and the size of the sub-band is the frequency band included in one REG cluster. In the above possible implementation, the precoding of multiple REGs within the same REG cluster is the same, so that joint filtering can be performed on the signals on these multiple REGs, thereby ensuring the performance of channel estimation.

[0011] In a possible implementation of the first aspect, the first CCE includes M consecutively numbered CCEs, the second CCE includes N consecutively numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). Among them, when the CORESET includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the CORESET, and the second CCE includes N consecutively numbered CCEs in the CORESET. At this time, the number of CCEs included in the CORESET can be (M + N). When the CORESET is associated with the first PDCCH candidate and the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the first PDCCH candidate, and the second CCE includes N consecutively numbered CCEs in the first PDCCH candidate. At this time, the number of CCEs included in the first PDCCH candidate can be (M + N). Optionally, M is equal to N. Optionally, multiple first PDCCH candidates associated with the CORESET all include the first CCE and the second CCE; when the multiple first PDCCH candidates correspond to different aggregation levels, there is an overlap between the first CCE and the second CCE between two of the first PDCCH candidates. In the above possible implementation, the PDCCH candidate associated with the CORESET can correspond to two QCL assumptions, so that when the network device sends DCI on the PDCCH candidate according to the first QCL assumption and the second QCL assumption, diversity gain of PDCCH transmission can be achieved; in addition, this implementation can also make the CCEs corresponding to the same QCL assumption as continuous as possible in the frequency domain, thereby ensuring the performance of channel estimation.

[0012] In a possible implementation of the first aspect, the precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same. This precoding method can also be referred to as wideband precoding, and the size of the wideband is the frequency band included in the multiple consecutive REG clusters. In the above possible implementation, the precoding of the multiple consecutive REG clusters is the same, which can make the CCEs corresponding to the same QCL assumption as continuous as possible in the frequency domain, so that the signals on these multiple CCEs can be jointly filtered, and further ensure the performance of channel estimation.

[0013] In a possible implementation of the first aspect, the first PDCCH candidate is a PDCCH candidate among the multiple PDCCH candidates associated with the CORESET whose aggregation level is greater than or equal to a predetermined aggregation level. The predetermined aggregation level can be set in advance or configured by a network device, etc. For example, the value of the predetermined aggregation level can be 4 or 8 or 16. Optionally, the first PDCCH candidate is the PDCCH candidate with the largest aggregation level among the PDCCH candidates associated with the CORESET. In the above possible implementation, it is possible to make as many CCEs corresponding to the same QCL assumption as possible continuous in the frequency domain, so that the signals on these multiple CCEs can be jointly filtered, thereby ensuring the performance of channel estimation.

[0014] In a possible implementation of the first aspect, the CORESET is associated with two adjacent first PDCCH candidates in the frequency domain. These two first PDCCH candidates are respectively referred to as the first PDCCH candidate 0 and the first PDCCH candidate 1. The first CCE in the first PDCCH candidate 0 and the first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or the second CCE in the first PDCCH candidate 0 and the second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain. In the above possible implementation, it is possible to make as many CCEs corresponding to the same QCL assumption as possible continuous in the frequency domain, so that the signals on these multiple CCEs can be jointly filtered, thereby ensuring the performance of channel estimation.

[0015] In a possible implementation of the first aspect, the CORESET is further associated with 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 assumption; or when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption. In the above possible implementation, it is possible to make as many CCEs corresponding to the same QCL assumption as possible continuous in the frequency domain, so that the signals on these multiple CCEs can be jointly filtered, thereby ensuring the performance of channel estimation.

[0016] In a possible implementation of the first 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 adopts the first QCL assumption; 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 assumption. Among them, the third CCE may belong to a PDCCH candidate allocated to other user equipment, or the REG corresponding to the third CCE is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE. In the above possible implementation, the CCEs corresponding to the same QCL assumption can be made as continuous as possible in the frequency domain, so that channel estimation can be performed based on the DMRS on these multiple CCEs, thereby improving the accuracy of channel estimation and reducing the complexity of channel estimation at the same time.

[0017] In a possible implementation of the first aspect, the CORESET adopts a non-interleaved mapping method from CCE to REG cluster. In the above possible implementation, the CCEs corresponding to the same QCL assumption can be made as continuous as possible in the frequency domain, so that joint filtering can be performed on the signals on these multiple CCEs, thereby ensuring the performance of channel estimation.

[0018] In a possible implementation of the first aspect, the mapping method of multiple QCL assumptions on the CORESET or on the PDCCH candidates associated with the CORESET is determined according to the precoding granularity of the CORESET.

[0019] In a possible implementation of the first aspect, the mapping method of multiple QCL assumptions on the CORESET or on the PDCCH candidates associated with the CORESET is determined according to the interleaving method of the CORESET.

[0020] Second aspect, a downlink control information receiving method is provided, and the method includes: receiving indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption; where the CORESET is associated with a first PDCCH candidate and the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, or the CORESET includes the first REG cluster and the second REG cluster; the above-mentioned first REG cluster and second REG cluster do not overlap and both include one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster; according to the first QCL assumption and the second QCL assumption, downlink control information is received on the first REG cluster and the second REG cluster respectively. At the same time, the technical solution is a QCL assumption mapped in terms of frequency domain resources, and multiple QCL assumptions can correspond to multiple symbols in the time domain, so as to enable joint filtering on multiple symbols, and further improve the performance of channel estimation.

[0021] 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 assumption, and the second REG cluster corresponds to the second QCL assumption, so that the first PDCCH candidate corresponds to two QCL assumptions. In this way, when the network device sends DCI on the first PDCCH candidate according to the first QCL assumption and the second QCL assumption, the diversity gain of PDCCH transmission can be achieved.

[0022] In a possible implementation manner of the second aspect, the method further includes: 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. In the above possible implementation manner, the network device can 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.

[0023] 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 an interleaved mapping method of 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 the interleaved matrix of the CCE-to-REG cluster mapping. In the above possible implementation manner, the user equipment and the network device can 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 method, so as to reduce the signaling interaction between the user equipment and the network device.

[0024] In a possible implementation 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 shape in the frequency domain of the CORESET, which can also be referred to as the REG clusters in the first REG cluster and the REG clusters in the second REG cluster being alternately distributed in the frequency domain of the CORESET. Each comb can include Z REG clusters, that is, multiple QCL assumptions are alternately mapped with Z consecutively numbered REG clusters as the granularity. The value of Z can be a positive integer. Optionally, the first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers. Among them, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the CORESET, and the second REG cluster includes the REG clusters with even numbers in the CORESET. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the first PDCCH candidate, and the second REG cluster includes the REG clusters with even numbers in the first PDCCH candidate. In the above possible implementation, the PDCCH candidate associated with the CORESET can correspond to two QCL assumptions, so that when the network device sends DCI on the PDCCH according to the first QCL assumption and the second QCL assumption, the diversity gain of PDCCH transmission can be achieved.

[0025] In a possible implementation of the second aspect, the precoding granularity of the CORESET is the REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding method can also be referred to as sub-band precoding, and the size of the sub-band is the frequency band included in one REG cluster. In the above possible implementation, 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, thereby ensuring the performance of channel estimation.

[0026] In a possible implementation of the second aspect, both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters. Among them, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes X consecutively numbered REG clusters in the CORESET, and the second REG cluster includes Y consecutively numbered REG clusters in the CORESET. At this time, the number of REG clusters included in the CORESET can be (X + Y), where X and Y are positive integers. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes X' consecutively numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' consecutively numbered REG clusters in the first PDCCH candidate. At this time, the number of REG clusters included in the first PDCCH candidate can be (X' + Y'), where X' and Y' are positive integers. In the above possible implementation, the PDCCH candidate associated with the CORESET can correspond to two QCL assumptions, so that when the network device sends DCI on the PDCCH candidate according to the first QCL assumption and the second QCL assumption, the diversity gain of PDCCH transmission can be achieved; in addition, this implementation can also make the CCEs corresponding to the same QCL assumption as continuous as possible in the frequency domain, so as to ensure the performance of channel estimation.

[0027] In a possible implementation of the second aspect, the precoding of multiple consecutively numbered REG clusters within the first REG cluster in the frequency domain is the same; and / or, the precoding of multiple consecutively numbered REG clusters within the second REG cluster in the frequency domain is the same. This precoding method can also be called wideband precoding, and the size of the wideband is the frequency band included in the multiple consecutively numbered REG clusters. In the above possible implementation, since the precoding of the multiple consecutively numbered REG clusters is the same, the REG clusters corresponding to the same QCL assumption can be made as continuous as possible in the frequency domain, so that the signals on these multiple REG clusters can be jointly filtered, and further the performance of channel estimation can be ensured.

[0028] In a possible implementation manner of the second aspect, when the first REG cluster in the first PDCCH candidate is adjacent to the third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in this CORESET, the demodulation reference signal DMRS on the third REG adopts the first QCL assumption; or when the second REG cluster in the first PDCCH candidate is adjacent to the third REG cluster in the frequency domain, and the third REG cluster does not belong to any PDCCH candidate in this CORESET, the DMRS on the third REG cluster adopts the second QCL assumption. Wherein, the third REG cluster may belong to a PDCCH candidate allocated to other user equipment, or the third REG cluster is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third REG cluster. In the above possible implementation manner, the REG clusters corresponding to the same QCL assumption can be made as continuous as possible in the frequency domain, so that channel estimation can be performed based on the DMRS on these multiple REG clusters, thereby improving the accuracy of channel estimation and reducing the complexity of channel estimation.

[0029] In a possible implementation manner of the second aspect, determine the mapping manner of multiple QCL assumptions on this CORESET or on the PDCCH candidate associated with this CORESET according to the precoding granularity of this CORESET.

[0030] In a possible implementation manner of the second aspect, determine the mapping manner of multiple QCL assumptions on this CORESET or on the PDCCH candidate associated with this CORESET according to the interleaving manner of this CORESET.

[0031] In a third aspect, a method for sending downlink control information is provided. The method includes: sending indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption; wherein, this CORESET is associated with a first PDCCH candidate and the first PDCCH candidate includes a first control channel element CCE and a second CCE, or this CORESET includes a first CCE and a second CCE; both the above first CCE and second CCE include one or more CCEs and the numbers of the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; send downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0032] In a possible implementation 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 can also be referred to as the CCEs in the first CCE and the CCEs in the second CCE being alternately distributed in the frequency domain of the CORESET. Each comb can include W CCEs, that is, multiple QCL assumptions are alternately mapped with W consecutively numbered CCEs as a granularity, and the value of W can be a positive integer. Optionally, the first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers. Among them, when the CORESET includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the CORESET, and the second CCE includes the CCEs with even numbers in the CORESET. When the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the first PDCCH candidate, and the second CCE includes the CCEs with even numbers in the first PDCCH candidate.

[0033] In a possible implementation of the third aspect, the precoding granularity of the CORESET is a resource element group (REG) cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding method can also be referred to as sub-band precoding, and the size of the sub-band is the frequency band included in one REG cluster.

[0034] In a possible implementation of the third aspect, the first CCE includes M consecutively numbered CCEs, the second CCE includes N consecutively numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). Among them, when the CORESET includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the CORESET, and the second CCE includes N consecutively numbered CCEs in the CORESET. At this time, the number of CCEs included in the CORESET can be (M + N). When the CORESET is associated with the first PDCCH candidate and the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the first PDCCH candidate, and the second CCE includes N consecutively numbered CCEs in the first PDCCH candidate. At this time, the number of CCEs included in the first PDCCH candidate can be (M + N).

[0035] In a possible implementation of the third aspect, the precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same. This precoding method can also be referred to as wide-band precoding, and the size of the wide-band is the frequency band included in multiple consecutive REG clusters.

[0036] In a possible implementation of the third aspect, the first PDCCH candidate is a PDCCH candidate among the multiple PDCCH candidates associated with the CORESET whose aggregation level is greater than or equal to a predetermined aggregation level. The predetermined aggregation level can be set in advance or configured by a network device, etc. For example, the value of the predetermined aggregation level can be 4 or 8 or 16. Optionally, the first PDCCH candidate is the PDCCH candidate with the largest aggregation level among the PDCCH candidates associated with the CORESET.

[0037] In a possible implementation of the third aspect, two first PDCCH candidates adjacent in the frequency domain are associated with the CORESET. These two first PDCCH candidates are respectively referred to as the first PDCCH candidate 0 and the first PDCCH candidate 1. The first CCE in the first PDCCH candidate 0 and the first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or the second CCE in the first PDCCH candidate 0 and the second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

[0038] In a possible implementation of the third aspect, the CORESET is further associated with 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 assumption; or when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

[0039] In a possible implementation of the third aspect, 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 adopts the first QCL assumption; or when the 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 adopts the second QCL assumption. Herein, the third CCE may belong to a PDCCH candidate allocated to another user equipment, or the REG corresponding to the third CCE is used to transmit the PDCCH of another user equipment, or no DCI transmission is allocated on the third CCE.

[0040] In a possible implementation of the third aspect, the CORESET adopts a non-interleaved mapping manner from CCE to REG cluster.

[0041] Fourthly, a method for transmitting downlink control information is provided. The method includes: transmitting indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption; wherein, the CORESET is associated with a first PDCCH candidate and the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, or the CORESET includes the first REG cluster and the second REG cluster; the above-mentioned first REG cluster and second REG cluster do not overlap and each includes one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster; according to the first QCL assumption and the second QCL assumption, downlink control information is transmitted on the first REG cluster and the second REG cluster respectively.

[0042] In a possible implementation manner of the fourth aspect, the method further includes: transmitting 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.

[0043] 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 each one half of the number of REG clusters in the first PDCCH candidate; or, the CORESET adopts an interleaved mapping manner of 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 interleaved matrix dimension of the CCE to REG cluster mapping.

[0044] 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 shape in the frequency domain of the CORESET, which can also be referred to as the REG clusters in the first REG cluster and the REG clusters in the second REG cluster being alternately distributed in the frequency domain of the CORESET. Each comb can include Z REG clusters, that is, multiple QCL assumptions are alternately mapped with Z consecutively numbered REG clusters as a granularity, and the value of Z can be a positive integer. Optionally, the first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers. Wherein, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the CORESET, and the second REG cluster includes the REG clusters with even numbers in the CORESET. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the first PDCCH candidate, and the second REG cluster includes the REG clusters with even numbers in the first PDCCH candidate.

[0045] In a possible implementation of the fourth aspect, the precoding granularity of the CORESET is a REG cluster. That is, the precodings of the signals transmitted within the same REG cluster are the same, and / or the precodings of the signals transmitted in different REG clusters are different. This precoding method can also be referred to as subband precoding, and the size of the subband is the frequency band included in one REG cluster.

[0046] In a possible implementation of the fourth aspect, both the first REG cluster and the second REG cluster include a plurality of consecutively numbered REG clusters. Among them, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes X consecutively numbered REG clusters in the CORESET, and the second REG cluster includes Y consecutively numbered REG clusters in the CORESET. At this time, the number of REG clusters included in the CORESET can be (X + Y), where X and Y are positive integers. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes X' consecutively numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' consecutively numbered REG clusters in the first PDCCH candidate. At this time, the number of REG clusters included in the first PDCCH candidate can be (X' + Y'), where X' and Y' are positive integers.

[0047] In a possible implementation of the fourth aspect, the precodings of a plurality of REG clusters that are frequency-domain continuous within the first REG cluster are the same; and / or the precodings of a plurality of REG clusters that are frequency-domain continuous within the second REG cluster are the same. This precoding method can also be referred to as wideband precoding, and the size of the wideband is the frequency band included in the plurality of consecutive REG clusters.

[0048] In a possible implementation of the fourth aspect, when the first REG cluster in the first PDCCH candidate is adjacent to the third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal DMRS on the third REG uses the first QCL assumption; or when the second REG cluster in the first PDCCH candidate is adjacent to the 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 uses the second QCL assumption. Among them, the third REG cluster can belong to the PDCCH candidate allocated to other user equipment, or the third REG cluster is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third REG cluster.

[0049] In a fifth aspect, a downlink control information receiving apparatus is provided. 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 quasi co-location (QCL) assumption and a second QCL assumption; where the CORESET is associated with a first physical downlink control channel (PDCCH) candidate and the first PDCCH candidate includes a first control channel element (CCE) and a second CCE, or the CORESET includes the first CCE and the second CCE; the first CCE and the second CCE each include one or more CCEs and have different numbers, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; the receiving unit is further configured to receive downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0050] 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 the CCEs in the first CCE and the CCEs in the second CCE being alternately distributed in the frequency domain of the CORESET. Each comb may include W CCEs, that is, multiple QCL assumptions are alternately mapped in units of W consecutively numbered CCEs, and the value of W may be a positive integer. Optionally, the first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers. Where when the CORESET includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the CORESET, and the second CCE includes the CCEs with even numbers in the CORESET. When the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the first PDCCH candidate, and the second CCE includes the CCEs with even numbers in the first PDCCH candidate.

[0051] 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 the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding manner may also be referred to as subband precoding, and the size of the subband is the frequency band included in one REG cluster.

[0052] In a possible implementation of the fifth aspect, the first CCE includes M consecutive-numbered CCEs, the second CCE includes N consecutive-numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). Among them, when the CORESET includes the first CCE and the second CCE, the first CCE includes M consecutive-numbered CCEs in the CORESET, the second CCE includes N consecutive-numbered CCEs in the CORESET, and at this time, the number of CCEs included in the CORESET can be (M + N). When the CORESET is associated with the first PDCCH candidate and the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes M consecutive-numbered CCEs in the first PDCCH candidate, the second CCE includes N consecutive-numbered CCEs in the first PDCCH candidate, and at this time, the number of CCEs included in the first PDCCH candidate can be (M + N).

[0053] In a possible implementation of the fifth aspect, the precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same. This precoding method can also be referred to as wideband precoding, and the size of the wideband is the frequency band included in multiple consecutive REG clusters.

[0054] In a possible implementation 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 multiple PDCCH candidates associated with the CORESET. The predetermined aggregation level can be set in advance or configured by a network device, etc. For example, the value of the predetermined aggregation level can be 4 or 8 or 16. Optionally, the first PDCCH candidate is the PDCCH candidate with the largest aggregation level among the PDCCH candidates associated with the CORESET.

[0055] In a possible implementation of the fifth aspect, the CORESET is associated with two first PDCCH candidates that are adjacent in the frequency domain. These two first PDCCH candidates are respectively referred to as the first PDCCH candidate 0 and the first PDCCH candidate 1. The first CCE in the first PDCCH candidate 0 and the first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or the second CCE in the first PDCCH candidate 0 and the second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

[0056] In a possible implementation of the fifth aspect, the CORESET is further associated with 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 assumption; or when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

[0057] In a possible implementation 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 adopts the first QCL assumption; 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 assumption.

[0058] In a possible implementation of the fifth aspect, the CORESET adopts a non-interleaved mapping manner from CCE to REG cluster.

[0059] In the sixth aspect, a downlink control information receiving device is provided. The device 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 assumption and a second QCL assumption; wherein, the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, the first REG cluster and the second REG cluster do not overlap and both include one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption 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 respectively according to the first QCL assumption and the second QCL assumption. Wherein, the third CCE may belong to a PDCCH candidate allocated to other user equipment, or the REG corresponding to the third CCE is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

[0060] In a possible implementation of the sixth aspect, the receiving unit is further configured to: receive 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.

[0061] In a possible implementation 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 each one-half of the number of REG clusters in the first PDCCH candidate; alternatively, the CORESET adopts an interleaved mapping method of REG clusters to control channel elements 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 the dimension of the interleaved matrix of the CCE-to-REG cluster mapping.

[0062] In a possible implementation of the sixth aspect, the first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers.

[0063] In a possible implementation of the sixth aspect, the precoding granularity of the CORESET is a REG cluster.

[0064] In a possible implementation of the sixth aspect, both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters.

[0065] In a possible implementation of the sixth aspect, the precoding of multiple frequency-domain consecutive REG clusters within the first REG cluster is the same; and / or, the precoding of multiple frequency-domain consecutive REG clusters within the second REG cluster is the same.

[0066] In a possible implementation of the sixth aspect, when the first REG cluster in the first PDCCH candidate 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 demodulation reference signal DMRS on the third REG adopts the first QCL assumption; or, when the 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 assumption. Among them, the third REG cluster may belong to a PDCCH candidate assigned to other user equipment, or the third REG cluster is used to transmit the PDCCH of other user equipment, or no DCI transmission is assigned on the third REG cluster.

[0067] In a seventh aspect, a downlink control information transmission apparatus is provided. The apparatus includes: a transmission unit configured to transmit indication information of a control resource set (CORESET), where the indication information is used to indicate a first quasi co-location (QCL) assumption and a second QCL assumption; wherein, the CORESET is associated with a first physical downlink control channel (PDCCH) candidate and the first PDCCH candidate includes a first resource element group (REG) cluster and a second REG cluster, or the CORESET includes the first REG cluster and the second REG cluster; the above-mentioned first control channel element (CCE) and second CCE each include one or more CCEs and the numbers of the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; the transmission unit is further configured to transmit downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0068] 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 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 being alternately distributed in the frequency domain of the CORESET. Each comb may include Z REG clusters, that is, multiple QCL assumptions are alternately mapped in units of Z consecutively numbered REG clusters, and the value of Z may be a positive integer. Optionally, the first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers. Among them, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the CORESET, and the second REG cluster includes the REG clusters with even numbers in the CORESET. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the first PDCCH candidate, and the second REG cluster includes the REG clusters with even numbers in the first PDCCH candidate.

[0069] In a possible implementation manner of the seventh aspect, the precoding granularity of the CORESET is a REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding method may also be referred to as sub-band precoding, and the size of the sub-band is the frequency band included in one REG cluster.

[0070] In a possible implementation of the seventh aspect, the first CCE includes M consecutively numbered CCEs, the second CCE includes N consecutively numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N). Wherein, when the CORESET includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the CORESET, and the second CCE includes N consecutively numbered CCEs in the CORESET. At this time, the number of CCEs included in the CORESET can be (M + N). When the CORESET is associated with the first PDCCH candidate and the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes M consecutively numbered CCEs in the first PDCCH candidate, and the second CCE includes N consecutively numbered CCEs in the first PDCCH candidate. At this time, the number of CCEs included in the first PDCCH candidate can be (M + N).

[0071] In a possible implementation of the seventh aspect, the precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same. This precoding method can also be referred to as wideband precoding, and the size of the wideband is the frequency band included in multiple consecutive REG clusters.

[0072] In a possible implementation of the seventh aspect, the first PDCCH candidate is a PDCCH candidate among multiple PDCCH candidates associated with the CORESET and having an aggregation level greater than or equal to a predetermined aggregation level. The predetermined aggregation level can be set in advance or configured by a network device, etc. For example, the value of the predetermined aggregation level can be 4 or 8 or 16. Optionally, the first PDCCH candidate is the PDCCH candidate with the largest aggregation level among the PDCCH candidates associated with the CORESET.

[0073] In a possible implementation of the seventh aspect, the CORESET is associated with two first PDCCH candidates that are adjacent in the frequency domain. These two first PDCCH candidates are respectively referred to as the first PDCCH candidate 0 and the first PDCCH candidate 1. The first CCE in the first PDCCH candidate 0 and the first CCE in the first PDCCH candidate 1 are adjacent in the frequency domain, or the second CCE in the first PDCCH candidate 0 and the second CCE in the first PDCCH candidate 1 are adjacent in the frequency domain.

[0074] In a possible implementation of the seventh aspect, the CORESET is further associated with 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 assumption; or when the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

[0075] In a possible implementation 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 adopts the first QCL assumption; 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 assumption. Wherein, the third CCE may belong to the PDCCH candidate allocated to other user equipment, or the REG corresponding to the third CCE is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

[0076] In a possible implementation of the seventh aspect, the CORESET adopts a non-interleaved mapping method from CCE to REG cluster.

[0077] In the eighth aspect, a downlink control information sending device is provided. The device includes: 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 assumption and a second QCL assumption; wherein, the CORESET is associated with a first PDCCH candidate and the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, or the CORESET includes a first REG cluster and a second REG cluster; the above-mentioned first REG cluster and second REG cluster do not overlap and both include one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption 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 respectively according to the first QCL assumption and the second QCL assumption.

[0078] In a possible implementation of the eighth aspect, the sending unit is further configured to: send 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.

[0079] In a possible implementation of the eighth aspect, the number of REG clusters included in the first REG cluster set and the number of REG clusters included in the second REG cluster set are each one half of the number of REG clusters in the first PDCCH candidate; alternatively, the CORESET adopts an interleaved mapping manner from REG clusters to control channel elements (CCEs), and the number of REG clusters included in the first REG cluster set and the number of REG clusters included in the second REG cluster set are determined by the dimensions of the interleaving matrix of the CCE-to-REG cluster mapping.

[0080] In a possible implementation of the eighth aspect, the REG clusters in the first REG cluster set and the REG clusters in the second REG cluster set are distributed in a comb shape in the frequency domain of the CORESET, which can also be referred to as the REG clusters in the first REG cluster set and the REG clusters in the second REG cluster set being alternately distributed in the frequency domain of the CORESET. Each comb can include Z REG clusters, that is, multiple QCL assumptions are alternately mapped in units of Z consecutively numbered REG clusters, and the value of Z can be a positive integer. Optionally, the first REG cluster set includes REG clusters with odd numbers, and the second REG cluster set includes REG clusters with even numbers. Among them, when the CORESET includes the first REG cluster set and the second REG cluster set, the first REG cluster set includes the REG clusters with odd numbers in the CORESET, and the second REG cluster set includes the REG clusters with even numbers in the CORESET. When the first PDCCH candidate includes the first REG cluster set and the second REG cluster set, the first REG cluster set includes the REG clusters with odd numbers in the first PDCCH candidate, and the second REG cluster set includes the REG clusters with even numbers in the first PDCCH candidate.

[0081] In a possible implementation of the eighth aspect, the precoding granularity of the CORESET is a REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted in different REG clusters is different. This precoding method can also be referred to as sub-band precoding, and the size of the sub-band is the frequency band included in one REG cluster.

[0082] In a possible implementation of the eighth aspect, both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters. Among them, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes X consecutively numbered REG clusters in the CORESET, and the second REG cluster includes Y consecutively numbered REG clusters in the CORESET. At this time, the number of REG clusters included in the CORESET can be (X + Y), where X and Y are positive integers. When the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes X' consecutively numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' consecutively numbered REG clusters in the first PDCCH candidate. At this time, the number of REG clusters included in the first PDCCH candidate can be (X' + Y'), where X' and Y' are positive integers.

[0083] In a possible implementation of the eighth aspect, the precoding of multiple consecutively numbered REG clusters within the first REG cluster in the frequency domain is the same; and / or, the precoding of multiple consecutively numbered REG clusters within the second REG cluster in the frequency domain is the same. This precoding method can also be referred to as broadband precoding, and the size of the broadband is the frequency band included in the multiple consecutively numbered REG clusters.

[0084] In a possible implementation of the eighth aspect, when the first REG cluster in the first PDCCH candidate is adjacent to the third REG cluster in the frequency domain, and the third REG does not belong to any PDCCH candidate in the CORESET, the demodulation reference signal DMRS on the third REG adopts the first QCL assumption; or, when the second REG cluster in the first PDCCH candidate is adjacent to the 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 assumption. Among them, the third REG cluster may belong to the PDCCH candidate assigned to other user equipment, or the third REG cluster is used to transmit the PDCCH of other user equipment, or no DCI transmission is assigned on the third REG cluster.

[0085] In the ninth aspect, a downlink control information receiving device is provided. The device can be a user equipment or a chip in the user equipment. The device includes a processor, and may further include a memory, a communication interface, and a bus. The processor, the memory, and the communication interface are connected through the bus. Instructions are stored in the memory. When the processor runs the instructions, the device executes the downlink control information receiving method provided in the first aspect or any possible implementation of the first aspect.

[0086] In a tenth aspect, a downlink control information receiving device is provided. The device may be a user equipment or a chip in the user equipment. The device includes a processor, and may further include a memory, a communication interface, and a bus. The processor, the memory, and the communication interface are connected through the bus. Instructions are stored in the memory. When the processor runs the instructions, the device executes the downlink control information receiving method provided in the second aspect or any possible implementation manner of the second aspect.

[0087] In an eleventh aspect, a downlink control information transmitting device is provided. The device may be a network device or a chip in the network device. The device includes a processor, and may further include a memory, a communication interface, and a bus. The processor, the memory, and the communication interface are connected through the bus. Instructions are stored in the memory. When the processor runs the instructions, the device executes the downlink control information transmitting method provided in the third aspect or any possible implementation manner of the third aspect.

[0088] In a twelfth aspect, a downlink control information transmitting device is provided. The device may be a network device or a chip in the network device. The device includes a processor, and may further include a memory, a communication interface, and a bus. The processor, the memory, and the communication interface are connected through the bus. Instructions are stored in the memory. When the processor runs the instructions, the device executes the downlink control information transmitting method provided in the fourth aspect or any possible implementation manner of the fourth aspect.

[0089] In yet another aspect of the present application, a communication system is provided. The communication system includes a user equipment and a network device. The user equipment is the downlink control information receiving device provided in the fifth aspect, any possible implementation manner of the fifth aspect, or the ninth aspect, and is used to execute the downlink control information receiving method provided in the first aspect or any possible implementation manner of the first aspect. The network device is the downlink control information transmitting device provided in the seventh aspect, any possible implementation manner of the seventh aspect, or the eleventh aspect, and is used to execute the downlink control information transmitting method provided in the third aspect or any possible implementation manner of the third aspect.

[0090] In yet another aspect of the present application, a communication system is provided. The communication system includes a user equipment and a network device. The user equipment is the downlink control information receiving device provided in the sixth aspect, any possible implementation manner of the sixth aspect, or the tenth aspect, and is used to execute the downlink control information receiving method provided in the second aspect or any possible implementation manner of the second aspect. The network device is the downlink control information transmitting device provided in the eighth aspect, any possible implementation manner of the eighth aspect, or the twelfth aspect, and is used to execute the downlink control information transmitting method provided in the fourth aspect or any possible implementation manner of the fourth aspect.

[0091] In another aspect of the present application, there is provided a computer-readable storage medium storing instructions which, when run on a device, cause the device to execute the downlink control information receiving method provided in the above first aspect or any possible implementation manner of the first aspect.

[0092] In another aspect of the present application, there is provided a computer-readable storage medium storing instructions which, when run on a device, cause the device to execute the downlink control information receiving method provided in the above second aspect or any possible implementation manner of the second aspect.

[0093] In another aspect of the present application, there is provided a computer-readable storage medium storing instructions which, when run on a device, cause the device to execute the downlink control information sending method provided in the above third aspect or any possible implementation manner of the third aspect.

[0094] In another aspect of the present application, there is provided a computer-readable storage medium storing instructions which, when run on a device, cause the device to execute the downlink control information sending method provided in the above fourth aspect or any possible implementation manner of the fourth aspect.

[0095] In another aspect of the present application, there is provided a computer program product which, when run on a device, causes the device to execute the downlink control information receiving method provided in the above first aspect or any possible implementation manner of the first aspect.

[0096] In another aspect of the present application, there is provided a computer program product which, when run on a device, causes the device to execute the downlink control information receiving method provided in the above second aspect or any possible implementation manner of the second aspect.

[0097] In another aspect of the present application, there is provided a computer program product which, when run on a device, causes the device to execute the downlink control information sending method provided in the above third aspect or any possible implementation manner of the third aspect.

[0098] In another aspect of the present application, there is provided a computer program product which, when run on a device, causes the device to execute the downlink control information sending method provided in the above fourth aspect or any possible implementation manner of the fourth aspect.

[0099] Understandably, the apparatus for any of the above-provided downlink control information receiving methods, the corresponding transmitting method and apparatus, computer-readable storage medium, and computer program product corresponding to the receiving method all include all the features of the downlink control information receiving method provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects in the corresponding method provided above, and will not be elaborated here. Description of the Drawings

[0100] Figure 1 Schematic diagram of a CORESET provided by an embodiment of the present application;

[0101] Figure 2 Schematic diagram of a PDCCH candidate associated with a CORESET provided by an embodiment of the present application;

[0102] Figure 3 Schematic diagram of a CCE in a CORESET provided by an embodiment of the present application;

[0103] Figure 4 Another schematic diagram of a CCE in a CORESET provided by an embodiment of the present application;

[0104] Figure 5 Schematic diagram of the structure of a communication system provided by an embodiment of the present application;

[0105] Figure 6 Another schematic diagram of the structure of a communication system provided by an embodiment of the present application;

[0106] Figure 7 Schematic diagram of the flow of a downlink control information transmission method provided by an embodiment of the present application;

[0107] Figure 8 Schematic diagram of a CORESET and a first PDCCH candidate provided by an embodiment of the present application;

[0108] Figure 9 Another schematic diagram of a CORESET and a first PDCCH candidate provided by an embodiment of the present application;

[0109] Figure 10 Schematic diagram of a PDCCH candidate provided by an embodiment of the present application;

[0110] Figure 11 Another schematic diagram of a PDCCH candidate provided by an embodiment of the present application;

[0111] Figure 12 Another schematic diagram of a PDCCH candidate provided by an embodiment of the present application;

[0112] Figure 13Schematic diagram of a PDCCH candidate and a third CCE provided by an embodiment of the present application;

[0113] Figure 14 Flow schematic diagram of another downlink control information transmission method provided by an embodiment of the present application;

[0114] Figure 15 Schematic diagram of the structure of a downlink control information receiving device provided by an embodiment of the present application;

[0115] Figure 16 Schematic diagram of the structure of another downlink control information receiving device provided by an embodiment of the present application;

[0116] Figure 17 Schematic diagram of the structure of a downlink control information sending device provided by an embodiment of the present application;

[0117] Figure 18 Schematic diagram of the structure of another downlink control information sending device provided by an embodiment of the present application. Detailed implementation manners

[0118] In the present application, "at least one" means one or more, and "a plurality" means two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone, where A and B may be singular or plural. The character " / " generally represents an "or" relationship between the associated objects before and after. "At least one (item)" or its similar expression refers to any combination of these items, including any combination of single item (item) or plural items (items). For example, at least one (item) of a, b, or c may represent: a, b, c, a and b, a and c, b and c, or a, b, and c, where a, b, c may be single or multiple. In addition, the embodiments of the present application use terms such as "first" and "second" to distinguish the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only used to distinguish different thresholds and do not limit their sequence. Those skilled in the art can understand that terms such as "first" and "second" do not limit the quantity and execution order.

[0119] It should be noted that in the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific manner.

[0120] Before introducing the embodiments of the present application, the relevant terms involved in the embodiments of the present application will be introduced and explained first.

[0121] The quasi co-location (QCL) assumption of a signal is used to characterize the large-scale characteristics of the channel that the signal experiences from being sent by the sending end to being received by the receiving end. These large-scale characteristics at least include: doppler shift, doppler spread, delay spread, average delay, and spatial rx parameter.

[0122] Among them, the Doppler frequency offset can be understood as follows: Since there is an angle between the moving direction of the receiving end and the signal arrival direction, the Doppler frequency offset of the signal is caused. For example, when the signal is sent, the frequency is fc. Due to the movement of the receiving end, the frequency of the received signal will be (fc+ / -fd), and fd is the Doppler frequency offset. The Doppler spread can be understood as follows: Since the signal propagation experiences a scattering path, the frequency band of the signal transmission will spread out of the band at the receiving end, resulting in Doppler spread. The delay spread can be understood as follows: For a pulse signal sent by the sending end, the signal received at the receiving end not only contains the signal itself, but also contains the signals at each delay point, which will cause the time width of the signal to expand. The average delay can be understood as follows: The average delay of the signal arriving at the receiving end after passing through the multipath channel. The spatial reception parameter can be understood as follows: The transmission signal of the sending end will adopt a beamforming (beamforming) scheme (digital weighting sum) to make the transmission signal have the characteristic of directional transmission in space. The receiving end can adopt a beamforming scheme corresponding to the sending beamforming to improve the performance of the received signal. This receiving beamforming information is the spatial reception parameter information. The network device can configure the transmission control indication (TCI) state. The TCI state includes the QCL type and the index value of the reference signal under this type. This TCI state indicates that under this QCL type, there is a QCL association relationship between this reference signal and the DMRS port. That is to say, the QCL hypothesis of the DMRS port can be obtained based on this reference signal. For example, if the TCI state is configured with a QCL type A, there is a quasi-colocation association relationship between the reference signal ID1 and the DMRS port, and if the TCI state is configured with a QCL type D, there is a quasi-colocation association relationship between the reference signal ID2 and the DMRS port, then the user equipment can receive the DMRS based on the QCL hypothesis under the QCL type A and the QCL hypothesis under the QCL type D obtained from the reference signal ID1. The reference signal configured in this TCI state can be a channel state information reference signal (CSI-RS), a tracking reference signal (TRS), or a cell common reference signal, etc.

[0123] Among them, the QCL types include QCL type A, QCL type B, QCL type C, and QCL type D. The QCL assumptions corresponding to QCL type A include Doppler frequency offset, Doppler spread, delay spread, and average delay. The QCL assumptions corresponding to QCL type B include Doppler frequency offset and Doppler spread. The QCL assumptions corresponding to QCL type C include Doppler frequency offset and average delay. The QCL assumptions corresponding to QCL type D include the spatial reception parameters and spatial reception beamforming parameters of the DMRS port. Taking QCL type A as an example, if there is a QCL type A relationship between the DMRS port and reference signal port 1, the Doppler frequency offset, Doppler spread, delay spread, and average delay of the DMRS port are determined according to this reference signal port 1. For example, the user equipment first performs signal processing based on reference signal port 1 to determine the relevant parameters included in QCL type A, then the above parameters of the DMRS port are the same as or have a corresponding relationship with the above parameters of reference signal port 1. In addition, if there is a QCL type D relationship between the DMRS port and the reference signal port, the spatial reception parameters and spatial reception beamforming parameters of the DMRS port are determined according to this reference signal port. It should be understood that the received beam information of multiple reference signals satisfying the QCL type D relationship is the same, and the received beam of the data channel is the same as that of the DMRS, that is, based on this QCL relationship and the received beam information of the reference signal, the user equipment can infer the received beam used for receiving the data channel and the DMRS.

[0124] The control resource set (CORESET) represents all the time-frequency physical resources used to carry the downlink control information (DCI). That is, the CORESET refers to the resource pool configured by the base station for carrying DCI, or is a set of candidate physical resources for carrying DCI. Exemplarily, the number of resource blocks (RBs) occupied by the CORESET in the frequency domain is an integer multiple of 6, and it can occupy multiple consecutive or non-consecutive RBs. The position information of the RBs occupied by the CORESET can be indicated by a bitmap. In the time domain, it can occupy 1 - 3 consecutive OFDM symbols, and the specific number of OFDM symbols occupied can be configured by the base station. As Figure 1As shown, taking the frequency-domain resource bandwidth including 18 RBs (denoted as RB0 - RB17 respectively) as an example, the positions of the RBs occupied by three CORESETs are illustrated. These three CORESETs are denoted as CORESET1, CORESET2, and CORESET3. In Figure 1 , CORESET1 occupies 12 consecutive RBs, which are RB0 - RB11 respectively; CORESET2 occupies 12 non-consecutive RBs, which are RB1 - RB6 and RB11 - RB16 respectively; CORESET3 occupies 6 RBs in part of the frequency-domain resource bandwidth, which are RB0 - RB5 respectively.

[0125] In addition, the QCL assumption information for signal transmission on this physical resource, the scrambling ID of DMRS on this physical resource, and the precoding method (including wideband precoding method and subband precoding method) and other information are also configured in the CORESET. Among them, the wideband precoding method means that the same beamforming is used on the resources of this CORESET, or the same beamforming is used on the frequency-domain or time-domain continuous resources of this CORESET. Among them, beamforming refers to the process of configuring the transmitting end or receiving end of multiple antennas to generate a directional transmitting or receiving beam by controlling the phase and amplitude of each transmitting antenna.

[0126] A physical downlink control channel (PDCCH) candidate refers to the physical resource position corresponding to each DCI detection of a user equipment (UE), and can also be understood as the basic granularity for the UE to blindly detect DCI, that is, one PDCCH candidate corresponds to one DCI detection or a DCI detection process. The DCI detection process can refer to operations such as parsing, decoding, and judging information bits. The number of PDCCH candidates reflects the complexity of the UE's DCI detection or the overhead of DCI processing resources. The blind detection ability of the UE can be defined by the number of PDCCH candidates on a partial bandwidth in a carrier. As shown in Table 1 below, the maximum detection numbers of PDCCH candidates under several different subcarrier spacings are listed. Among them, the smaller the subcarrier spacing, the larger the maximum detection number.

[0127] Table 1

[0128] Subcarrier Spacing (kHz) Maximum Number of Detected PDCCH Candidates 15 44 30 36 60 22 120 20

[0129] Meanwhile, another metric for the blind detection complexity of the UE is the complexity of channel estimation. One metric method is characterized by the number of non-overlapped CCEs in a partial bandwidth of a carrier. As shown in Table 2, it can be understood that PDCCH candidates at different aggregation levels may occupy some of the same CCEs, but the channel estimation process is only performed once on the partially same CCEs, while the channel estimation on different CCEs has to be processed.

[0130] Table 2

[0131]

[0132]

[0133] The physical resource size and location corresponding to each PDCCH candidate in the CORESET can be determined by the aggregation level (AL) corresponding to the PDCCH candidate and the number of the control channel element (CCE) included in the PDCCH candidate.

[0134] The AL is used to characterize the amount of time-frequency resources occupied by a PDCCH candidate. For example, the value of the AL is the number of CCEs, and the candidate values of the AL are: {1, 2, 4, 8, 16}. When the channel condition is poor, a larger AL can be used to send DCI to increase reliability, and when the channel condition is good, a smaller AL can be used to send DCI to save resource overhead. Under each AL, one or more PDCCH candidates can be configured, and different PDCCH candidates under the same AL do not overlap in physical resources or include CCEs with different numbers. PDCCH candidates under different ALs independently determine the included CCEs according to a predefined manner. For example, for the search space set s associated with the CORESET numbered p, for the time slot and the carrier indication value n CI (if carrier indication is not supported, n CI = 0), the number of the CCEs included in the PDCCH candidate at the aggregation level L corresponding to it is:

[0135]

[0136] Among them, for the PDCCH candidate in a cell common search space set, for the PDCCH candidate in a specific search space set s, this parameter is determined according to the CORESET number. N CCE,p is the number of CCEs included in the CORESET p, and the numbers of the CCEs are sequentially from 0 to N in this CORESET CCE,p-1; is the number of PDCCH candidates at the aggregation level L configured in the specific search space set s. Optionally, is the maximum value of at the aggregation level L configured in the specific search space set s under all carrier indications; n RNTI is the scrambling value of the DCI.

[0137] According to the preset rules of the above example, the CCE numbers included in each PDCCH candidate can be determined. Since each specific CCE number corresponds to a specific physical resource, the CCEs included in each PDCCH candidate can be used to represent the actual physical resource position occupied by each PDCCH candidate in the CORESET. As Figure 2 shown, assuming that the CORESET includes 8 CCEs (denoted as CCE0 - CCE7 respectively), the number of PDCCH candidates included in this CORESET can be 7, the number of PDCCH candidates with AL = 2 is 4, the number of PDCCH candidates with AL = 4 is 2, and the number of PDCCH candidates with AL = 8 is 1. In Figure 2 , the 4 PDCCH candidates with AL = 2 are respectively denoted as AL2 PDCCH candidate 0, AL2 PDCCH candidate 1, AL2 PDCCH candidate 2, and AL2 PDCCH candidate 3, and the corresponding CCEs are CCE0 - CCE1, CCE2 - CCE3, CCE4 - CCE5, CCE6 - CCE7 respectively; the 2 PDCCH candidates with AL = 4 are respectively denoted as AL4 PDCCH candidate 0 and AL4 PDCCH candidate 1, and the corresponding CCEs are CCE0 - CCE3, CCE4 - CCE7 respectively; the 1 PDCCH candidate with AL = 8 is denoted as AL8 PDCCH candidate 0, and the corresponding CCEs are CCE0 - CCE7 respectively.

[0138] Among them, one CCE includes 6 resource element groups (REG). A REG is the basic physical resource unit of the control channel. Each REG includes 1 RB in the frequency domain and 1 OFDM symbol in the time domain. The REGs in a CORESET are numbered in sequence first in the time domain and then in the frequency domain. Multiple consecutive numbered REGs can form a REG bundle, and multiple REG bundles are numbered in sequence according to the occupied frequency domain positions on the CORESET. There is a corresponding relationship between each CCE number and the REG bundle, which is used to determine the actual physical resource position of each CCE. Specifically, there can be two corresponding relationships, namely non - interleave and interleave corresponding relationships.

[0139] Non-interleaved: Each CCE sequentially includes one or more REG clusters from a lower frequency-domain position to a higher frequency-domain position in ascending order of number (in existing protocols, each CCE is supported to include 1 - 3 REG clusters, each CCE includes 6 REGs, and the size of a REG cluster is 2, 3, or 6 REGs). The REG clusters included in each CCE do not overlap, that is, adjacent-numbered CCEs include adjacent physical resources. As Figure 3 shown, the CORESET includes 24 REGs ( Figure 3 where 0 to 23 represent the numbers of the REGs), and if 6 REGs form a REG cluster, then this CORESET can be divided into 4 CCEs and each CCE corresponds to a REG cluster in sequence, Figure 3 which is represented as CCE0 - CCE3 and REG cluster 0 - REG cluster 3 respectively, Figure 3 and this CORESET occupying one OFDM symbol in the time domain is taken as an example for illustration.

[0140] Interleaved: Each CCE includes one or more REG clusters, and the numbers of the multiple REG clusters are non-consecutive. Among them, the protocol will pre-define the interleaving rule so that the base station and the UE can determine the actual physical resources included in each CCE. Specifically, first generate an interleaving matrix: The variable R represents the number of rows of the interleaving matrix, the variable H represents the number of columns of the interleaving matrix, R * H (* represents the multiplication sign) is the total number of REG clusters included in the CORESET, and the numbers of the REG clusters are mapped to each element of the interleaving matrix in the order of first row and then column. For example, the number of the REG cluster corresponding to the a-th row and the b-th column in the interleaving matrix is a * H + b; according to this interleaving matrix, the mapping relationship between the CCE and the REG cluster can be further determined. For example, each CCE can sequentially take the elements of the interleaving matrix in the order of first row and then column, and the elements taken by a CCE in this order are the REG clusters included in this CCE. For example, the first CCE takes the elements of the first column in the interleaving matrix, and the second CCE takes the elements of the first column in the interleaving matrix. An example of an interleaving method: The number of symbols L ∈ {2, 6}, the number of symbols then for the REG cluster f(x) in the REG clusters included in each CCE, the following formula is satisfied:

[0141]

[0142] In the formula, x = cR + r, r = 0, 1,..., R - 1, c = 0, 1,..., C - 1, R ∈ {2, 3, 6}.

[0143] As Figure 4 shown, assume that the number of rows R = 3 and the number of columns H = 8 of the interleaving matrix,Figure 4 The numbers 0 to 23 therein represent REG clusters arranged in sequence in a CORESET. Exemplarily, if the size of a REG cluster is 2 REGs, then 8 CCEs (i.e., CCE0 to CCE7) are obtained according to the above mapping relationship. CCE0 includes the REG cluster {0, 8, 16}, CCE1 includes the REG cluster {1, 9, 17},..., CCE7 includes the REG cluster {7, 15, 23}, specifically as shown in Figure 4 (a) in. Only the REG clusters included in CCE0 are shown in the figure; if the size of a REG cluster is 6 REGs, then 24 CCEs (i.e., CCE0 to CCE23) are obtained according to the above mapping relationship. CCE0 to CCE23 respectively include the REG clusters 0, 8, 16, 1, 9, 17,..., 7, 15, 23, specifically as shown in Figure 4 (b) in. Only the REG clusters included in CCE0 - CCE2 are shown in the figure.

[0144] The technical solution provided by this application can be applied to a variety of communication systems or communication scenarios. For example, on the basis of existing communication systems, the multi - TRP transmission DCI technology is introduced, such as 4G communication systems, 5G communication systems, future evolved systems, or various communication fusion systems, etc. In a possible embodiment, the technical solution provided by this application can also be applied to frequency division duplex (FDD) systems and time division duplex (TDD) systems. The technical solution provided by this application can include a variety of application scenarios. For example, in the scenarios of homogeneous networks and heterogeneous networks, and also in scenarios such as machine to machine (M2M), D2M, macro - micro communication, enhanced mobile broadband (eMBB), ultra - reliable & low - latency communication (uRLLC), and massive machine - type communication (mMTC), etc. In a possible embodiment, the technical solution provided by this application can also be applied to low - frequency communication scenarios or high - frequency communication scenarios. In another possible embodiment, the technical solution provided by this application can also be applied to single - TRP scenarios, or multi - TRP scenarios, and any derivative scenarios thereof, etc.

[0145] An embodiment of the present application provides a system architecture of a communication system, and the communication system includes a network device 100 and a user device 200. In this communication system, the network device 100 sends information (such as downlink control information DCI) to the user device 200 through a downlink channel (for example, a physical downlink control channel (PDCCH)), and the user device 200 sends information to the network device 100 through an uplink channel (for example, a physical uplink control channel (PUCCH)).

[0146] In a possible embodiment, as Figure 5 shown, the network device 100 may include a network device 110 and at least two network devices 120. Among them, the network device 110 has a scheduling function and can be used to manage and allocate network resources, etc.; at least two network devices 120 have a forwarding function and can be used to forward communication information between the network device 110 and the user device 200. Figure 5 In the following, an example in which at least two network devices 120 include two network devices 120 is used for illustration.

[0147] In another possible embodiment, as Figure 6 shown, the network device 100 may include a building baseband unit (BBU) and at least two remote radio heads (RRHs). The at least two RRHs can be used to forward communication information sent by the BBU to the user device 200. Figure 6 In the following, an example in which at least two RRHs include two RRHs (i.e., RRH1 and RRH2) is used for illustration.

[0148] Among them, the network device 100 may include an evolved Node B (NodeB or eNB or e-nodeB) in a Long Term Evolution - Advanced (LTE-A) system or a Long Term Evolution (LTE) system, a next generation Node B (gNB) in a 5G New Radio (NR) system (also simply referred to as the NR system), or a centralized unit (CU) and a distributed unit (DU) in a Cloud Radio Access Network (Cloud RAN) system, etc. In one embodiment, the network device 100 may be a base station in a cellular network or a first type of base station or a second type of 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, and a secondary cell, etc. In yet another embodiment, the network device 100 may also be different base stations or cells among a macro base station, a micro base station, a small base station, a relay station, an access point, a primary cell, and a secondary cell.

[0149] The user equipment 200 may be any terminal device capable of communicating with the network device 100. For example, the user equipment 200 may be an access terminal, a mobile station, a remote station, a roadside station, a remote terminal, a mobile device, a terminal, a user equipment (UE), a UE unit, a UE station, a UE terminal, a wireless communication device, a UE agent, or a UE device, etc. The 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 capabilities, a computing device, or other processing devices 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.

[0150] Figure 7 It is a schematic flow diagram of a DCI transmission method provided by an embodiment of this application. This method can be applied to Figure 5 or Figure 6 the communication system shown. This method includes the following steps.

[0151] S301: The network device sends indication information of a CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption.

[0152] S302: The user equipment receives indication information of a CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption. Optionally, the first QCL assumption and the second QCL assumption are associated with the CORESET.

[0153] Optionally, the indication information of the CORESET may be sent through radio resource control (RRC) signaling, or multiple QCL assumptions may be configured through RRC signaling first, and then the first QCL assumption and the second QCL assumption are activated for the CORESET from the multiple QCL assumptions through media access control control element (MAC CE) signaling.

[0154] In an embodiment of this application, the CORESET in the above two steps S301 and S302 may adopt a non-interleaved CCE-to-REG cluster mapping method (corresponding English: CCE to REG mapping), or may adopt an interleaved CCE-to-REG cluster mapping method, and this application embodiment does not make specific restrictions on this. The CORESET may include a first CCE and a second CCE; alternatively, the CORESET is associated with a first PDCCH candidate, and the first PDCCH candidate includes the first CCE and the second CCE ( Figure 7 is taken as an example for illustration here). The physical resources corresponding to the first CCE and the second CCE do not overlap and both include one or more CCEs. The first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE.

[0155] Optionally, the first CCE and the second CCE include CCEs with different numbers.

[0156] Among them, the first CCE may refer to one or more CCEs corresponding to the first QCL assumption, and the first CCE may also be referred to as the first CCE set or the first CCE group. The second CCE may refer to one or more CCEs corresponding to the second QCL assumption, and the second CCE may also be referred to as the second CCE set or the second CCE group.

[0157] In addition, the non-overlap of the first CCE and the second CCE may specifically refer to that the REG corresponding to the first CCE does not overlap with the REG corresponding to the second CCE. For example, Figure 3As shown, the first CCE includes CCE0 (corresponding REG numbers are 0 to 5) and CCE1 (corresponding REG numbers are 6 to 11), and the second CCE includes CCE2 (corresponding REG numbers are 12 to 17) and CCE3 (corresponding REG numbers are 18 to 23). The non - overlap of the first CCE and the second CCE specifically means that the REGs numbered 0 to 11 do not overlap with the REGs numbered 12 to 23.

[0158] Specifically, the network device or the user equipment may first determine that the first CCE included in the CORESET corresponds to the first QCL assumption, and the second CCE corresponds to the second QCL assumption; then determine one or more PDCCH candidates associated with the CORESET, so that the QCL assumptions corresponding to the CCEs in the one or more PDCCH candidates are 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, then determine that the first CCE included in the PDCCH candidate corresponds to the first QCL assumption and the second CCE corresponds to the second QCL assumption.

[0159] In a possible implementation manner, the first QCL assumption and the second QCL assumption belong to the same QCL type. Specifically, both the first QCL assumption and the second QCL assumption are of QCL type A, or both the first QCL assumption and the second QCL assumption are of QCL type D.

[0160] Next, the positions of the first CCE and the second CCE in the CORESET or the first PDCCH candidate are introduced and described.

[0161] It should be noted that the numbers of the CCEs involved in the following text are the numbers of the CCEs obtained when numbering all the CCEs included in the CORESET as a whole. For example, if the CORESET includes 100 CCEs, the numbers of these 100 CCEs can be 0 to 99 in sequence.

[0162] In the first embodiment, the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb - like pattern in the frequency domain of the CORESET, which can also be referred to as the CCEs in the first CCE and the CCEs in the second CCE being alternately distributed in the frequency domain of the CORESET. Among them, when the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb - like pattern, each comb can include W CCEs. For example, the value of W can be 1 or 2, etc. The embodiments of the present application do not make specific limitations on this. When W takes 2, it means that multiple QCL assumptions are alternately mapped with two consecutively numbered CCEs as a granularity.

[0163] In a possible implementation, the first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers.

[0164] Specifically, when the CORESET includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the CORESET, and the second CCE includes the CCEs with even numbers in the CORESET. For example, as Figure 8 shown, the CORESET includes 8 CCEs, and the corresponding numbers are 0 to 7 in sequence. Then the first CCE includes the CCEs numbered 1, 3, 5, and 7, and the second CCE includes the CCEs numbered 0, 2, 4, and 6. It should be noted that for the convenience of distinction, Figure 8 CCEi is used to represent the number of the CCE (the value of i ranges from 0 to 7), the numbers 0 to 15 are used to represent the numbers of the REG clusters, and an example is given with the number of REGs included in each REG cluster being 3.

[0165] When the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes the CCEs with odd numbers in the first PDCCH candidate, and the second CCE includes the CCEs with even numbers in the first PDCCH candidate. For example, as Figure 8 shown, the CORESET includes 8 CCEs, and the corresponding numbers are 0 to 7 in sequence. The first PDCCH candidate includes the CCEs encoded as 0 - 3. Then the first CCE includes the CCEs numbered 1 and 3, and the second CCE includes the CCEs numbered 0 and 2.

[0166] It should be noted that Figure 8 in (a), the mapping from CCEs to REG clusters in the CORESET is non - interleaved, Figure 8 and in (b), the mapping from CCEs to REG clusters in the CORESET is interleaved is taken as an example for illustration.

[0167] Optionally, when the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb - like pattern, the precoding granularity of the CORESET can be a REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the 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 joint filtering can be performed on the signals on these multiple REGs. This precoding method can also be called sub - band precoding, and the size of the sub - band is the frequency band included in one REG cluster.

[0168] In practical applications, when the CCEs in the first CCE and the CCEs in the second CCE are distributed in a comb-like pattern, the precoding of multiple consecutive CCEs within the first CCE can be the same, and / or the precoding of multiple consecutive CCEs within the second CCE can also be the same. This precoding method can be referred to as a wideband precoding method, or it can also be said that the precoding granularity of this CORESET is wideband, that is, the signals transmitted within consecutive frequency-domain resources in this CORESET use the same precoding.

[0169] In the second embodiment, the first CCE includes M consecutive-numbered CCEs, and the second CCE includes N consecutive-numbered CCEs. Among them, the values of M and N can be equal or not equal, and the embodiments of the present application do not make specific limitations on this.

[0170] Specifically, when this CORESET includes the first CCE and the second CCE, the first CCE includes M consecutive-numbered CCEs in this CORESET, and the second CCE includes N consecutive-numbered CCEs in this CORESET. At this time, the number of CCEs included in this CORESET can be (M + N). When this CORESET is associated with the first PDCCH candidate, and the first PDCCH candidate includes the first CCE and the second CCE, the first CCE includes M consecutive-numbered CCEs in the first PDCCH candidate, and the second CCE includes N consecutive-numbered CCEs in the first PDCCH candidate. At this time, the number of CCEs included in the first PDCCH candidate can be (M + N).

[0171] For example, as Figure 9 shown, this CORESET includes 8 CCEs, and the corresponding numbers are 0 to 7 in sequence. When this CORESET includes the first CCE and the second CCE, if the values of M and N are both 4, the first CCE can include the CCEs numbered 0 to 3, and the second CCE can include the CCEs numbered 4 to 7. Or, the first CCE can include the CCEs numbered 4 to 7, and the second CCE can include the CCEs numbered 0 to 3. When the first PDCCH candidate includes the first CCE and the second CCE, assuming that the first PDCCH candidate includes the CCEs numbered 0 to 3 among the 8 CCEs, and the values of M and N are both 2, the first CCE can include the CCEs numbered 0 and 1, and the second CCE can include the CCEs numbered 2 and 3. Or, the first CCE can include the CCEs numbered 2 and 3, and the second CCE can include the CCEs numbered 0 and 1.

[0172] Optionally, when the first CCE includes M consecutively numbered CCEs and the second CCE includes N consecutively numbered CCEs, the precoding of multiple consecutive CCEs within the first CCE may be the same, and / or the precoding of multiple consecutive CCEs within the second CCE may also be the same. This precoding method may be referred to as the wideband precoding method, or it may be said that the precoding granularity of this CORESET is wideband, that is, the signals transmitted within consecutive frequency-domain resources in this CORESET use the same precoding. In this way, the precoding of multiple consecutive CCEs within the first CCE or the second CCE is the same, so that the signals on these multiple CCEs can be jointly filtered.

[0173] Of course, when the first CCE includes M consecutively numbered CCEs and the second CCE includes N consecutively numbered CCEs, the precoding granularity of this CORESET may also be a REG cluster, that is, the precodings of the signals transmitted within the same REG cluster are the same, and / or the precodings of the signals transmitted within different REG clusters are different. The embodiments of the present application do not make specific limitations on this.

[0174] Optionally, according to the number of actually corresponding QCL assumptions on the CCE, determine the number of actually non-overlapped CCEs. Specifically, this CORESET is associated with 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 consecutively numbered CCEs in the first PDCCH candidate, and the second CCE includes N1 consecutively numbered CCEs in the first PDCCH candidate. The second PDCCH candidate includes a third CCE and a fourth CCE. The third CCE includes M2 consecutively numbered CCEs in the second PDCCH candidate, and the fourth CCE includes N2 consecutively numbered CCEs in the second PDCCH candidate. If the aggregation levels of the first PDCCH candidate and the second PDCCH candidate are different, there may be partial CCE overlap between the first PDCCH candidate and the second PDCCH candidate, and different QCL assumptions correspond to the overlapping CCEs. At this time, each CCE in the overlapping part should be counted as two non-overlapped CCEs when determining the blind detection complexity of the DCI.

[0175] Furthermore, this CORESET may be associated with multiple PDCCH candidates, and these multiple PDCCH candidates may include PDCCH candidates with multiple different aggregation levels. For example, as Figure 2As shown, this CORESET is associated with 7 PDCCH candidates, specifically including AL8 PDCCH candidate 0 with an aggregation level of 8, AL4 PDCCH candidate 0 and AL4 PDCCH candidate 1 with an aggregation level of 4, and AL2 PDCCH candidate 0, AL2 PDCCH candidate 1, AL2 PDCCH candidate 2, and AL2 PDCCH candidate 3 with an aggregation level of 2.

[0176] In a possible implementation, the first PDCCH candidate can be a PDCCH candidate among the multiple PDCCH candidates associated with this CORESET whose aggregation level is greater than or equal to a predetermined aggregation level. This predetermined aggregation level can be set in advance or configured by a network device, etc. For example, the value of this predetermined aggregation level can be 4, 8, or 16, and the embodiments of this application do not make specific limitations in this regard.

[0177] Optionally, the first PDCCH candidate is the PDCCH candidate with the largest aggregation level among the PDCCH candidates associated with this CORESET.

[0178] For example, if the value of this predetermined aggregation level is 4, and the PDCCH candidates among the multiple PDCCH candidates associated with this CORESET whose aggregation level is greater than or equal to 4 include AL8 PDCCH candidate 0, AL4 PDCCH candidate 0, and AL4 PDCCH candidate 1, then the first PDCCH candidate among these multiple PDCCH candidates can be AL8 PDCCH candidate 0, AL4 PDCCH candidate 0, or AL4 PDCCH candidate 1. When determining the first CCE and the second CCE in the manner provided by the second embodiment above, as Figure 10 shown, the first CCE in AL8 PDCCH candidate 0 can include CCE0 - CC3, the second CCE can include CCE4 - CCE7, the first CCE in AL4 PDCCH candidate 0 can include CCE0 - CCE1, the second CCE can include CCE2 - CCE3, the first CCE in AL4 PDCCH candidate 1 can include CCE4 - CC5, and the second CCE can include CCE6 - CCE7.

[0179] In another possible implementation, this CORESET can be associated with two first PDCCH candidates adjacent in the frequency domain, and the first CCEs in the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs in the two first PDCCH candidates are adjacent in the frequency domain. For ease of description, it is assumed hereinafter that these two first PDCCH candidates are PDCCH candidate 0 and PDCCH candidate 1 respectively.

[0180] Optionally, the two first PDCCH candidates are adjacent but non - overlapping in the frequency domain.

[0181] Among them, for the two first PDCCH candidates, the ranks of PDCCH candidate 0 and PDCCH candidate 1 can be the same or different. For example, the aggregation ranks of both PDCCH candidate 0 and PDCCH candidate 1 are 8, or the aggregation rank of PDCCH candidate 0 is 8 and the aggregation rank of PDCCH candidate 1 is 4.

[0182] In addition, for 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 can 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 the second CCE in PDCCH candidate 1 can also be the same or different. Suppose the number of CCEs included in the first CCE in PDCCH candidate 0 is M1, the number of CCEs included in the second CCE in PDCCH candidate 0 is N1, the number of CCEs included in the first CCE in PDCCH candidate 1 is M2, and the number of CCEs included in the second CCE in PDCCH candidate 1 is N2. Then M1 and M2 can be equal or unequal, and N1 and N2 can also be equal or unequal.

[0183] Specifically, the first CCEs in the two first PDCCH candidates being adjacent in the frequency domain can mean that the first CCE in PDCCH candidate 0 and the first CCE in PDCCH candidate 1 are adjacent in the frequency domain. For example, as shown in (a) of Figure 11 if PDCCH candidate 0 and PDCCH candidate 1 are respectively AL4 PDCCH candidate 0 and AL4 PDCCH candidate 1 with an aggregation rank of 4, the first CCE in AL4 PDCCH candidate 0 includes CCE2 - CCE3, the second CCE includes CCE0 - CCE1, the first CCE in AL4 PDCCH candidate 1 includes CCE4 - CCE5, and the second CCE includes CCE6 - CCE7, then the first CCE in PDCCH candidate 0 and the first CCE in PDCCH candidate 1 being adjacent in the frequency domain can specifically mean that CCE2 - CCE3 and CCE4 - CCE5 are adjacent in the frequency domain.

[0184] Similarly, the second CCEs in the two first PDCCH candidates being adjacent in the frequency domain can mean that the second CCE in PDCCH candidate 0 and the second CCE in PDCCH candidate 1 are adjacent in the frequency domain. For example, as shown in Figure 11As shown in (b) of [reference], if PDCCH candidate 0 and PDCCH candidate 1 are AL4 PDCCH candidate 0 and AL4 PDCCH candidate 1 with an aggregation level of 4 respectively, the first CCE in AL4 PDCCH candidate 0 includes CCE0 - CCE1, the second CCE includes CCE2 - CCE3, the first CCE in AL4 PDCCH candidate 1 includes CCE6 - CCE7, and the second CCE includes CCE4 - CCE5, then the second CCE in PDCCH candidate 0 and the second CCE in PDCCH candidate 1 being adjacent in the frequency domain specifically may mean that CCE2 - CCE3 and CCE4 - CCE5 are adjacent in the frequency domain.

[0185] Optionally, for two adjacent PDCCHs in a CORESET, denoted as PDCCH candidate 1 and PDCCH candidate 2 respectively, the partial CCEs included in PDCCH candidate 1 (hereinafter referred to as the first partial CCEs) and the partial CCEs included in PDCCH candidate 2 (hereinafter referred to as the second partial CCEs) are adjacent and correspond to the same QCL assumption. The QCL assumptions corresponding to the remaining CCEs other than the first partial CCEs included in PDCCH candidate 1 are different from the QCL assumption corresponding to the first partial CCEs, and the QCL assumptions corresponding to the remaining CCEs other than the second partial CCEs included in PDCCH candidate 2 are different from the QCL assumption corresponding to the second partial CCEs.

[0186] Thus, the CCEs corresponding to the same QCL assumption can be as continuous as possible in the frequency domain, ensuring the number of sampling points for frequency domain filtering during channel estimation, and further ensuring the performance of channel estimation.

[0187] In another possible implementation, the multiple PDCCH candidates associated with the CORESET further include a second PDCCH candidate, and the second PDCCH candidate is adjacent to the first PDCCH candidate in the frequency domain. When the CCEs of the second PDCCH candidate are adjacent to the first CCE in the first PDCCH candidate, the second PDCCH candidate corresponds to the first QCL assumption; or when the CCEs of the second PDCCH candidate are adjacent to the second CCE in the first PDCCH candidate, the second PDCCH candidate corresponds to the second QCL assumption.

[0188] For example, as Figure 12As shown, the first PDCCH candidate is the AL0 PDCCH candidate 0 with an aggregation level of 8. In the AL8 PDCCH candidate 0, the first CCE includes CCE0 - CCE3, and the second CCE includes CCE4 - CCE7. The second PDCCH candidate is the AL4 PDCCH candidate 2 with an aggregation level of 4. The AL4 PDCCH candidate 2 includes CCE8 - CCE11. CCE8 - CCE11 are adjacent to CCE4 - CCE7 in the frequency domain. Then, the second PDCCH candidate corresponds to the second QCL assumption, which can also be said that the second PDCCH candidate only includes the second CCE.

[0189] Thus, the CCEs corresponding to the same QCL assumption can be as continuous as possible in the frequency domain, ensuring the number of sampling points for frequency domain filtering during channel estimation, and further ensuring the performance of channel estimation.

[0190] 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 can be understood as: the third CCE does not belong to any PDCCH candidate allocated to this user equipment, or the REG corresponding to the third CCE is not used to transmit the PDCCH of this user equipment. For example, the third CCE may belong to the PDCCH candidate allocated to other user equipment, or the REG corresponding to the third CCE is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third CCE.

[0191] Among them, when the first CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain, the demodulation reference signal (DMRS) on the third CCE adopts the first QCL assumption; or, 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 adopts the second QCL assumption. At this time, the CORESET can adopt a non-interleaved mapping method from CCE to REG cluster.

[0192] For example, as Figure 13As shown in (a) therein, the first PDCCH candidate is the AL8 PDCCH candidate 0 with an aggregation level of 8. In the AL8 PDCCH candidate 0, the first CCE includes CCE8 - CCE11, and the second CCE includes CCE12 - 15. If the third CCE includes CCE6 - CCE7 and is adjacent to the first CCE in the AL8 PDCCH candidate 0 in the frequency domain, the DMRS on CCE6 - CCE7 adopts the first QCL assumption; if the third CCE includes CCE16 - CCE17 and is adjacent to the second CCE in the AL8 PDCCH candidate 0 in the frequency domain, the DMRS on CCE16 - CCE17 adopts the second QCL assumption.

[0193] For another example, as Figure 13 shown in (b) therein, the two first PDCCH candidates include the AL8 PDCCH candidate 0 and the AL8 PDCCH candidate 1 with an aggregation level of 8. In the AL8 PDCCH candidate 0, the first CCE includes CCE8 - CCE11, and the second CCE includes CCE12 - 15. In the AL8 PDCCH candidate 1, the first CCE includes CCE28 - CCE31, and the second CCE includes CCE24 - CCE27. If the third CCE includes CCE0 - CCE7 and is adjacent to the first CCE in the AL8 PDCCH candidate 0 in the frequency domain, the DMRS on CCE0 - CCE7 adopts the first QCL assumption; if the third CCE includes CCE16 - CCE23 and is adjacent to the second CCE in the AL8 PDCCH candidate 0 in the frequency domain and is also adjacent to the second CCE in the AL8 PDCCH candidate 1 in the frequency domain, the DMRS on CCE16 - CCE23 adopts the second QCL assumption.

[0194] In a possible implementation manner, determine the mapping manner of multiple QCL assumptions on this CORESET or on the PDCCH candidates associated with this CORESET according to the precoding granularity of this CORESET.

[0195] Specifically, when the precoding granularity of this CORESET is a REG cluster, multiple QCL assumptions are alternately mapped on this CORESET or on the PDCCH candidates associated with this CORESET. For example, the first CCE and the second CCE on this CORESET respectively include the REG clusters with odd numbers and the REG clusters with even numbers in the CORESET; or, the first CCE and the second CCE on the PDCCH candidates associated with this CORESET respectively include some REG clusters with odd numbers and some REG clusters with even numbers in the CORESET.

[0196] Specifically, when the precoding granularity of the CORESET is wideband, or when the REG clusters with consecutive numbers in the CORESET use the same precoding, multiple QCL assumptions are mapped on the CORESET or the set of PDCCH candidates associated with the CORESET. For example, the first CCE and the second CCE on the CORESET respectively include at least one set of multiple consecutive-numbered REG clusters in the CORESET and do not overlap with each other; the first CCE and the second CCE on the PDCCH candidates associated with the CORESET respectively include at least one set of multiple consecutive-numbered REG clusters in the CORESET and do not overlap with each other. For example, the number of consecutive-numbered REG clusters included in the first CCE and the second CCE respectively is one half of the total number of REG clusters in the CORESET, or one half of the total number of REG clusters in the PDCCH candidates.

[0197] In a possible implementation manner, the mapping manner of multiple QCL assumptions on the CORESET or on the PDCCH candidates associated with the CORESET is determined according to the interleaving manner of the CORESET. Specifically, when the mapping manner of CCE to REG cluster of the CORESET adopts a non-interleaved mapping manner, 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 total number of REG clusters in the CORESET. When the mapping manner of CCE to REG cluster of the CORESET adopts an interleaved mapping manner, the first CCE and the second CCE each include at least two sets of consecutive-numbered REG clusters, and the number of REG clusters in each set can be one quarter of the number of REG clusters in the CORESET.

[0198] In the embodiments of the present application, the above several possible implementation manners can all make as many consecutive frequency-domain resources as possible correspond to the same QCL assumption, so that the user equipment can perform channel estimation only once on these consecutive frequency-domain resources, thereby reducing the complexity of channel estimation.

[0199] S303: The network device sends DCI on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0200] Wherein, one PDCCH candidate is used to carry a complete DCI. When the network device sends DCI to the user equipment, the network device sends a DCI to the user equipment by carrying it through a PDCCH candidate associated with the CORESET.

[0201] A PDCCH candidate is used to carry a complete DCI, which can include the following two methods. First, the encoded DCI information bits are mapped in the time domain first and then the frequency domain, or the frequency domain first and then the time domain, or in a frequency-domain interleaved mapping order, on all the time-frequency resources occupied by a PDCCH candidate. The way for the user equipment to receive the DCI on this PDCCH candidate is to obtain all the information bits carried on this PDCCH candidate and uniformly enter the decoder to be mapped to the bit positions of the decoder in sequence. Second, the encoded DCI information bits are mapped in the time domain first and then the frequency domain, or the frequency domain first and then the time domain, or in a frequency-domain interleaved mapping order, on the first CCE of a PDCCH candidate, and the same DCI information bits are then mapped on the second CCE of this PDCCH candidate in the same mapping order. The way for the user equipment to receive the DCI on this PDCCH candidate is to separately obtain the information bits carried on the first CCE and the second CCE of this PDCCH candidate and separately enter the decoder to be mapped to the bit positions of the decoder in sequence. The user equipment needs to perform soft combining on the information obtained from the first CCE and the second CCE, that is, add the obtained likelihood values in sequence.

[0202] Specifically, when the CORESET is associated with a first PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, and the first QCL assumption corresponds to the first CCE and the second QCL assumption corresponds to the second CCE, the network device sending the DCI on the first PDCCH candidate includes: the network device sending a first DCI on the first CCE in the first PDCCH candidate according to the first QCL assumption, and sending a second DCI on the second CCE in the first PDCCH candidate according to the second QCL assumption. The DCI includes the first DCI and the second DCI.

[0203] For example, taking Figure 5 the network device in the shown communication system 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 will send the first DCI to the first network device 120 and send the second DCI to the second network device 120. The first network device 120 will send the first DCI to the user equipment on the first CCE in the first PDCCH candidate, and the second network device 120 will send the second DCI to the user equipment on the second CCE in the first PDCCH candidate.

[0204] For another example, taking Figure 6Taking the network device in the shown communication system as an example, if RRH1 adopts the first QCL assumption and RRH2 adopts the second QCL assumption, the network device sends the first DCI on the first CCE in the first PDCCH candidate through RRH1, and sends the second DCI on the second CCE in the first PDCCH candidate through RRH2.

[0205] Optionally, when the CORESET is further associated with a second PDCCH candidate, if the second PDCCH candidate corresponds to the first QCL assumption, the network device sends DCI on the second PDCCH candidate according to the first QCL assumption; if the second PDCCH candidate corresponds to the second QCL assumption, the network device sends DCI on the second PDCCH candidate according to the second QCL assumption.

[0206] S304: The user equipment receives DCI on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

[0207] Specifically, when the CORESET is associated with a first PDCCH candidate, the first PDCCH candidate includes a first CCE and a second CCE, and the first QCL assumption corresponds to the first CCE and the second QCL assumption corresponds to the second CCE, the user equipment receiving DCI on the first PDCCH candidate includes: the user equipment receives the first DCI on the first CCE in the first PDCCH candidate according to the first QCL assumption, and receives the second DCI on the second CCE in the first PDCCH candidate according to the second QCL assumption, and the DCI includes the first DCI and the second DCI. Furthermore, when the user equipment receives the first DCI and the second DCI, the user equipment can parse the first DCI and the second DCI as a whole to obtain the signaling information included in the DCI sent by the network device.

[0208] Optionally, the information bits included in the first DCI and the second DCI are the same, and the user equipment can parse the first DCI and the second DCI respectively and merge the soft information to obtain the signaling information included in the DCI sent by the network device.

[0209] Optionally, when the CORESET is further associated with a second PDCCH candidate, if the second PDCCH candidate corresponds to the first QCL assumption, the user equipment receives DCI on the second PDCCH candidate according to the first QCL assumption; if the second PDCCH candidate corresponds to the second QCL assumption, the user equipment receives DCI on the second PDCCH candidate according to the second QCL assumption. Furthermore, when the user equipment receives the DCI, the user equipment can parse the DCI to obtain the DCI sent by the network device.

[0210] Further, if the precoding granularity of the CORESET is a REG cluster, when the user equipment receives DCI, the user equipment can perform joint filtering on the signals on multiple REGs within the same REG cluster to improve the signal-to-noise ratio of the signals on these multiple REGs. If the precoding granularity of the CORESET is wideband, when the user equipment receives DCI, the user equipment can perform joint filtering on the signals on multiple consecutive CCEs with the same precoding within the CORESET to improve the signal-to-noise ratio of the signals on the multiple consecutive CCEs.

[0211] 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 adopts the first QCL assumption, the user equipment can further receive the DMRS on the third CCE according to the first QCL assumption; furthermore, the user equipment performs channel estimation based on the DMRS on the first CCE and the DMRS on the third CCE to improve the performance of channel estimation. When the second CCE in the first PDCCH candidate is adjacent to the third CCE in the frequency domain and the DMRS on the third CCE adopts the second QCL assumption, the user equipment can further receive the DMRS on the third CCE according to the second QCL assumption; furthermore, the user equipment performs channel estimation based on the DMRS on the second CCE and the DMRS on the third CCE to improve the performance of channel estimation.

[0212] In the 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 assumption, and the second CCE corresponds to the second QCL assumption. Thus, the first PDCCH candidate corresponds to two QCL assumptions, so that when the network device sends DCI on the first PDCCH candidate according to the first QCL assumption and the second QCL assumption, the diversity gain of PDCCH transmission can be achieved. At the same time, the method maps the QCL assumption with the frequency domain resource as the granularity, and multiple QCL assumptions can be corresponding to multiple symbols in the time domain, so that joint filtering on multiple symbols can be realized, and further the performance of channel estimation can be improved.

[0213] Figure 14 A flowchart of another DCI transmission method provided by the embodiment of the present application. This method can be applied to Figure 5 or Figure 6 the communication system shown in the figure, and this method includes the following steps.

[0214] S401: The network device sends indication information of the CORESET, and this indication information is used to indicate the first QCL assumption and the second QCL assumption.

[0215] S402: The user equipment receives the indication information of the CORESET, and the indication information is used to indicate the first QCL assumption and the second QCL assumption.

[0216] In the embodiments of the present application, the CORESET in the above two steps S4O1 and S4O2 may adopt a non-interleaved mapping method from CCE to REG cluster, or may adopt an interleaved mapping method from CCE to REG cluster. The embodiments of the present application do not make specific limitations on this. The CORESET may include a first REG cluster and a second REG cluster; alternatively, the CORESET is associated with a first PDCCH candidate, and the first PDCCH candidate includes a first REG cluster and a second REG cluster. The first REG cluster and the second REG cluster here do not overlap and both include one or more REG clusters. The first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster.

[0217] Among them, the first REG cluster may refer to one or more REG clusters corresponding to the first QCL assumption, and the first REG cluster may also be referred to as the first REG cluster set (REG Bundle Set, or a set of REG bundle) or the first REG cluster group. The second REG cluster may refer to one or more REG clusters corresponding to the second QCL assumption, and the second REG cluster may also be referred to as the second REG cluster set or the second REG cluster group. In addition, the non-overlap of the first REG cluster and the second REG cluster may specifically refer to that the one or more REG clusters included in the first REG cluster do not overlap with the one or more REG clusters included in the second REG cluster, or the numbers of the REG clusters included in the first REG cluster are different from the numbers of the REG clusters included in the second REG cluster.

[0218] Specifically, the network device or the user equipment may first determine that the first REG cluster included in the CORESET corresponds to the first QCL assumption and the second REG cluster corresponds to the second QCL assumption; then determine one or more PDCCH candidates associated with the CORESET, so that the QCL assumptions corresponding to the REG clusters in the one or more PDCCH candidates are 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, then determine that the first REG cluster included in the PDCCH candidate corresponds to the first QCL assumption and the second REG cluster corresponds to the second QCL assumption.

[0219] Next, the positions of the first REG cluster and the second REG cluster in the CORESET or the first PDCCH candidate are introduced and described.

[0220] It should be noted that the numbers of the REG clusters involved in the following text are the numbers of the REG clusters obtained when numbering all the REG clusters included in the CORESET in the order of frequency domain first and then time domain, time domain first and then frequency domain, or frequency domain interleaving. For example, if the CORESET includes 100 REG clusters, the numbers of these 100 REG clusters can be 0 to 99 in sequence.

[0221] In the first embodiment, the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are distributed in a comb shape in the CORESET or in the first PDCCH candidate, which can also be said that the REG clusters in the first REG cluster and the REG clusters in the second REG cluster are alternately distributed in the CORESET or in the first PDCCH candidate. Wherein, 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 can include Z REG clusters. For example, the value of Z can be 1, and the embodiments of the present application do not make specific limitations on this.

[0222] In a possible implementation manner, the first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers. Specifically, when the CORESET includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the CORESET, and the second REG cluster includes the REG clusters with even numbers in the CORESET. That is to say, the first REG cluster includes the REG clusters numbered 2n + 1 in the CORESET, and the second REG cluster includes the REG clusters numbered 2n in the CORESET, where n is an integer. For example, if the CORESET includes 16 REG clusters, and the corresponding numbers are 0 to 15 in sequence, then the first REG cluster includes the REG clusters numbered 1, 3, 5, 7, 9, 11, 13, and 15, and the second REG cluster includes the REG clusters numbered 0, 2, 4, 6, 8, 10, 12, and 14. Specifically, when the first PDCCH candidate includes the first REG cluster and the second REG cluster, the first REG cluster includes the REG clusters with odd numbers in the first PDCCH candidate, and the second REG cluster includes the REG clusters with even numbers in the first PDCCH candidate. That is to say, the first REG cluster includes the REG clusters numbered 2n + 1 in the first PDCCH candidate, and the second REG cluster includes the REG clusters numbered 2n in the first PDCCH candidate, where n is an integer. For example, if the CORESET includes 16 REG clusters, and the corresponding numbers are 0 to 15 in sequence, and the first PDCCH candidate associated with the CORESET includes the REG clusters encoded 0 - 7, then the first REG cluster includes the REG clusters numbered 1, 3, 5, and 7, and the second REG cluster includes the REG clusters numbered 0, 2, 4, and 6.

[0223] 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 this CORESET can be a REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the 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 joint filtering can be performed on the signals on these multiple REGs.

[0224] In a possible implementation manner, determine the mapping manner of multiple QCL assumptions on this CORESET or on the PDCCH candidates associated with this CORESET according to the precoding granularity of this CORESET. Specifically, when the precoding granularity of this CORESET is a REG cluster, multiple QCL assumptions are alternately mapped on this CORESET or on the PDCCH candidates associated with this CORESET. For example, the first REG cluster and the second REG cluster on this CORESET respectively include the REG clusters with odd numbers and the REG clusters with even numbers in the CORESET; the first REG cluster and the second REG cluster on the first PDCCH candidate associated with this CORESET respectively include some REG clusters with odd numbers and some REG clusters with even numbers in the CORESET.

[0225] 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 shape, the precoding of multiple consecutive REG clusters within the first REG cluster can be the same, and / or the precoding of multiple consecutive REG clusters within the second REG cluster can also be the same. This precoding method can be called a wideband precoding method, or it can also be said that the precoding granularity of this CORESET is wideband, that is, the signals transmitted in consecutive frequency-domain resources in this CORESET use the same precoding.

[0226] In the second embodiment, both the first REG cluster and the second REG cluster include at least one group of multiple consecutive REG clusters.

[0227] Specifically, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes X consecutively numbered REG clusters in the CORESET, and the second REG cluster includes Y consecutively numbered REG clusters in the CORESET. At this time, the number of REG clusters included in the CORESET can be (X + Y). For example, if the CORESET includes 16 REG clusters numbered from 0 to 15 in sequence, and the values of X and Y are both 8, then the first REG cluster can include the REG clusters numbered from 0 to 7, and the second REG cluster can include the REG clusters numbered from 8 to 15. Alternatively, the first REG cluster can include the REG clusters numbered from 8 to 15, and the second REG cluster can include the REG clusters numbered from 0 to 7.

[0228] Specifically, when the CORESET includes a first REG cluster and a second REG cluster, the first REG cluster includes K1 groups of X1 consecutively numbered REG clusters in the CORESET, and the second REG cluster includes K2 groups of X2 consecutively numbered REG clusters in the CORESET, and the first REG cluster and the second REG cluster are non - consecutive. At this time, the number of REG clusters included in the CORESET can be (K1 * X1 + K2 * X2). For example, if the CORESET includes 16 REG clusters numbered from 0 to 15 in sequence, and the values of K1 and K2 are both 2, and the values of X1 and X2 are both 4, then the first REG cluster can include the REG clusters numbered from 0 to 3 and from 8 to 11, and the second REG cluster can include the REG clusters numbered from 4 to 7 and from 12 to 15.

[0229] When the first PDCCH candidate includes a first REG cluster and a second REG cluster, the first REG cluster includes X' consecutively numbered REG clusters in the first PDCCH candidate, and the second REG cluster includes Y' consecutively numbered REG clusters in the first PDCCH candidate. At this time, the number of REG clusters included in the first PDCCH candidate can be (X' + Y'). For example, if the CORESET includes 16 REG clusters numbered from 0 to 15 in sequence, and the first PDCCH candidate includes the REG clusters numbered from 0 - 7, and the values of X' and Y' are both 4, then the first REG cluster can include the REG clusters numbered from 0 to 3, and the second REG cluster can include the REG clusters numbered from 4 to 7. Alternatively, the first REG cluster can include the REG clusters numbered from 4 to 7, and the second REG cluster can include the REG clusters numbered from 0 to 3.

[0230] 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 consecutively numbered REG clusters in the first PDCCH candidate, the second REG cluster includes K2 groups of X2 consecutively numbered REG clusters in the first PDCCH candidate, and the first REG cluster and the second REG cluster are non-consecutive. At this time, the number of REG clusters included in the first PDCCH candidate can be (K1 * X1 + K2 * X2). For example, the CORESET includes 16 REG clusters and the first PDCCH candidate includes 8 REG clusters, with corresponding numbers from 0 to 7 in sequence. If the values of K1 and K2 are both 2 and the values of X1 and X2 are both 2, the first REG cluster can include the REG clusters numbered from 0 to 1 and from 4 to 5, and the second REG cluster can include the REG clusters numbered from 2 to 3 and from 6 to 7.

[0231] Optionally, when both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters, the precoding of multiple consecutively numbered REG clusters within the first REG cluster can be the same, and / or the precoding of multiple consecutively numbered REG clusters within the second REG cluster can also be the same. This precoding method can be called the wideband precoding method, or it can be said that the precoding granularity of the CORESET is wideband, that is, the signals transmitted within the consecutive frequency domain resources in the CORESET use the same precoding. In this way, the precoding of multiple consecutively numbered REG clusters within the first REG cluster or the second REG cluster is the same, so that joint filtering can be performed on the signals on these multiple REG clusters.

[0232] Of course, when both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters, the precoding granularity of the CORESET can also be a REG cluster, that is, the precoding of the signals transmitted within the same REG cluster is the same, and / or the precoding of the signals transmitted within different REG clusters is different. The embodiments of the present application do not make specific limitations on this.

[0233] In a possible implementation manner, when the first REG cluster in the first PDCCH candidate is adjacent to the 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 uses the first QCL assumption; or, when the second REG cluster in the first PDCCH candidate is adjacent to the 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 uses the second QCL assumption. Among them, the third REG cluster can belong to the PDCCH candidate allocated to other user equipment, or the third REG cluster is used to transmit the PDCCH of other user equipment, or no DCI transmission is allocated on the third REG cluster.

[0234] Furthermore, the number of REG clusters included in the first REG cluster and the number of REG clusters included in the second REG cluster can be determined in the following two ways, which are specifically as follows.

[0235] In the first 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 configured by the network device.

[0236] Specifically, the network device sends configuration information to the user equipment, and this 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 this configuration information, the user equipment can 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 this configuration information.

[0237] 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.

[0238] In the second 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.

[0239] 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 each one-half of the number of REG clusters in the CORESET; when the first PDCCH candidate 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 each 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, can be configured by the network device.

[0240] Alternatively, when the CORESET adopts an interleaved mapping mode from CCE to REG clusters, 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 the interleaved matrix for the CCE-to-REG cluster mapping. Specifically, a group of consecutive REG clusters includes the REG clusters corresponding to one row in the interleaved matrix. The first REG cluster includes the REG clusters corresponding to the odd rows in the interleaved matrix, and the second REG cluster includes the REG clusters corresponding to the even rows in the interleaved matrix. That is, 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 of the interleaved matrix. For example, if there are 24 REG clusters in the CORESET and the dimension of the interleaved matrix is 4*6, then the first REG cluster includes the REG clusters corresponding to the first row and the third row of the interleaved matrix, and the second REG cluster includes the REG clusters corresponding to the second row and the fourth row of the interleaved matrix. That is, the first REG cluster includes the REG clusters numbered 0-5 and 12-17, and the second REG cluster includes the REG clusters numbered 6-11 and 18-23.

[0241] In a possible implementation manner, the mapping mode of multiple QCL assumptions on the CORESET or on the 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 wideband, or the REG clusters with consecutive numbers in the CORESET adopt the same precoding, the multiple QCL assumptions are mapped centrally on the CORESET or on the 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 consecutive REG clusters in the CORESET and do not overlap with each other; the first REG cluster and the second REG cluster on the PDCCH candidates associated with the CORESET respectively include at least one group of consecutive REG clusters in the CORESET and do not overlap with each other.

[0242] In a possible implementation manner, the mapping mode of multiple QCL assumptions on the CORESET or on the PDCCH candidates associated with the CORESET is determined according to the interleaving mode of the CORESET. Specifically, when the mapping mode from CCE to REG clusters 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 total number of REG clusters in the CORESET. When the mapping mode from CCE to REG clusters of the CORESET adopts an interleaved mapping mode, the first REG cluster and the second REG cluster each include at least two groups of consecutive REG clusters, and the number of REG clusters in each group can be one-fourth of the total number of REG clusters in the CORESET.

[0243] S403: The network device sends DCI on the first REG cluster and the second REG cluster respectively according to the first QCL assumption and the second QCL assumption.

[0244] Among them, one PDCCH candidate is used to carry a complete DCI. When the network device sends DCI to the user equipment, the network device sends a DCI to the user equipment through a PDCCH candidate associated with the CORESET.

[0245] Specifically, when the CORESET is associated with a first PDCCH candidate, the first PDCCH candidate includes a first REG cluster and a second REG cluster, and the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster, the network device sending DCI on the first PDCCH candidate includes: the network device sends a first DCI on the first REG cluster in the first PDCCH candidate according to the first QCL assumption, and sends a second DCI on the second REG cluster in the first PDCCH candidate according to the second QCL assumption, and the DCI includes the first DCI and the second DCI.

[0246] S404: The user equipment receives DCI on the first REG cluster and the second REG cluster respectively according to the first QCL assumption and the second QCL assumption.

[0247] Specifically, when the CORESET is associated with a first PDCCH candidate, the first PDCCH candidate includes a first REG cluster and a second REG cluster, and the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster, the user equipment receiving DCI on the first PDCCH candidate includes: the user equipment receives a first DCI on the first REG cluster in the first PDCCH candidate according to the first QCL assumption, and receives a second DCI on the second REG cluster in the first PDCCH candidate according to the second QCL assumption, and the DCI includes the first DCI and the second DCI. Furthermore, when the user equipment receives the first DCI and the second DCI, the user equipment can parse the first DCI and the second DCI as a whole to obtain the signaling information included in the DCI sent by the network device.

[0248] Optionally, the information bits included in the first DCI and the second DCI are the same, and the user equipment can parse the first DCI and the second DCI respectively and merge the soft information to obtain the signaling information included in the DCI sent by the network device.

[0249] It should be noted that all the relevant content in S303 and S304 above can also be cited in the descriptions of S403 and S404. The only difference is that S403 and S404 are described in terms of REG clusters, while S303 and S304 are described in terms of CCEs. In the embodiments 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 a first QCL assumption, and the second REG cluster corresponds to a second QCL assumption. Thus, the first PDCCH candidate corresponds to two QCL assumptions. In this way, when the network device sends DCI on the first PDCCH candidate according to the first QCL assumption and the second QCL assumption, diversity gain of PDCCH transmission can be achieved. At the same time, the QCL assumptions are mapped in terms of frequency-domain resources, and multiple QCL assumptions can correspond to multiple symbols in the time domain, so that joint filtering on multiple symbols can be realized, and further the performance of channel estimation can be improved.

[0250] The above mainly introduces the solutions provided by the embodiments of the present application from the perspectives of the user equipment and the network device. It can be understood that in order to implement the above functions, the user equipment and the network device include corresponding hardware structures and / or software modules for executing each function. Those skilled in the art should easily realize that, in combination with the network elements and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the form of hardware or computer software driving the hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0251] The embodiments of the present application can divide the user equipment and the network device into functional modules according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0252] In the case of adopting an integrated unit, Figure 15 FIG. shows a possible structural schematic diagram of the downlink control information receiving device involved in the embodiments of the present application. This device is used as a user equipment or a chip built in the user equipment, and includes: a receiving unit 501. Further, the device further includes a processing unit 502 and a sending unit 503.

[0253] In a possible implementation, the receiving unit 501 can be used to support the apparatus in performing S302, S304, etc. in the foregoing method embodiments. Further, the processing unit 502 can be used to support the apparatus in performing the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL assumption corresponds to the first CCE and the second QCL assumption corresponds to the second CCE in the foregoing method embodiments, and / or other technical processes described herein; the sending unit 503 can be used to support the apparatus in sending information to a network device.

[0254] In another possible implementation, the receiving unit 501 can be used to support the apparatus in performing S402, S404, etc. in the foregoing method embodiments, and the step of receiving configuration information. Further, the processing unit 502 can be used to support the apparatus in performing the steps of determining the first PDCCH candidate, the first REG cluster, and the second REG cluster, and determining that the first QCL assumption corresponds to the first REG cluster and the second QCL assumption corresponds to the second REG cluster in the foregoing method embodiments, and / or other technical processes described herein; the sending unit 503 can be used to support the apparatus in sending information to a network device.

[0255] It should be noted that all relevant content of each step involved in the foregoing method embodiments can be cited in the function descriptions of the corresponding functional modules, and will not be elaborated herein.

[0256] On the basis of being implemented by hardware, the processing unit 502 in the embodiments of the present application can be the processor of the apparatus, the receiving unit 501 can be the receiver of the apparatus, and the sending unit 503 can be the transmitter of the apparatus. The transmitter can usually be integrated with the receiver to be used as a transceiver. Specifically, the transceiver can also be called a communication interface.

[0257] As Figure 16 shown, it is another possible structural schematic diagram of the downlink control information receiving apparatus involved in the foregoing embodiments provided by the embodiments of the present application. The apparatus is a user equipment or a chip built in the user equipment, and includes: a processor 511, and may further include a memory 512, a communication interface 513, and a bus 514. The processor 511, the memory 512, and the communication interface 513 are connected through the bus 514.

[0258] Among them, the processor 511 is used to control and manage the operation of the downlink control information receiving device. In a possible implementation, the processor 511 can be used to support the device to execute the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL assumption corresponds to the first CCE and the second QCL assumption corresponds to the second CCE in the above method embodiments, and / or for other processes of the technologies described herein. In another possible implementation, the processor 511 can be used to support the device to execute the steps of determining the first PDCCH candidate, the first REG cluster, and the second REG cluster, and determining that the first QCL assumption corresponds to the first REG cluster and the second QCL assumption corresponds to the second REG cluster in the above method embodiments, and / or for other processes of the technologies described herein.

[0259] In addition, the communication interface 513 is used to support the device to communicate, for example, to support the device to communicate with a network device; the memory 512 is used to store the program code and data of the device.

[0260] In this application, the processor 511 can 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 devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in combination with the disclosure of this application. The processor can also be a combination that realizes computing functions, such as a combination including one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The above Figure 16 The bus 514 among them can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, only a thick line is used to represent the above Figure 16 in the figure, but it does not mean that there is only one bus or one type of bus.

[0261] In the case of adopting an integrated unit, Figure 17 FIG. shows a possible structural schematic diagram of the downlink control information sending device involved in the embodiments of this application. As a network device or a chip built in the network device, the device includes: a sending unit 601. Further, the device further includes a processing unit 602 and a receiving unit 603.

[0262] In a possible implementation manner, the sending unit 601 may be used to support the device in executing S301, S303, etc. in the foregoing method embodiments. Further, the processing unit 602 may be used to support the device in executing steps such as determining a first PDCCH candidate, a first CCE, and a second CCE, and determining that a first QCL assumption corresponds to the first CCE and a second QCL assumption corresponds to the second CCE in the foregoing method embodiments; the receiving unit 603 may be used to support the device in receiving information sent by a user equipment.

[0263] In another possible implementation manner, the sending unit 601 may be used to support the device in executing S401, S403, etc. in the foregoing method embodiments, and the step of sending configuration information; the processing unit 602 may be used to support the device in executing steps such as determining a first PDCCH candidate, a first REG cluster, and a second REG cluster, and determining that a first QCL assumption corresponds to the first REG cluster and a second QCL assumption corresponds to the second REG cluster in the foregoing method embodiments; the receiving unit 603 may be used to support the device in receiving information sent by a user equipment.

[0264] It should be noted that all relevant contents of the steps involved in the foregoing method embodiments can be cited in the function descriptions of the corresponding functional modules, and will not be elaborated herein.

[0265] On the basis of being implemented by hardware, the processing unit 602 in the embodiments of the present application may be a processor of the device, the sending unit 601 may be a transmitter of the device, the receiving unit 603 may be a receiver of the device, and the transmitter and the receiver are usually integrated together as a transceiver, and specifically, the transceiver may also be referred to as a communication interface.

[0266] As Figure 18 shown, it is another possible structural schematic diagram of a downlink control information sending device involved in the embodiments of the present application. The device, as a network device or a chip built in a network device, includes: a processor 611, and may further include a memory 612, a communication interface 613, and a bus 614.

[0267] Among them, the processor 611 is used to control and manage the operations of the device. In a possible implementation, the processor 611 can be used to support the device in performing the steps of determining the first PDCCH candidate, the first CCE, and the second CCE, and determining that the first QCL assumption corresponds to the first CCE and the second QCL assumption corresponds to the second CCE in the above method embodiments, and / or for other processes of the technologies described herein. In another possible implementation, the processor 611 can be used to support the device in performing the steps of determining the first PDCCH candidate, the first REG cluster, and the second REG cluster, and determining that the first QCL assumption corresponds to the first REG cluster and the second QCL assumption corresponds to the second REG cluster in the above method embodiments, and / or for other processes of the technologies described herein.

[0268] In addition, the communication interface 613 can be used to support the device in communicating, for example, supporting the device in communicating with other devices such as user equipment. The memory 612 can be used to store the program code and data of the device, etc.

[0269] In this application, the processor 611 can 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 devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules, and circuits described in combination with the disclosure of this application. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a digital signal processor and a microprocessor, and so on. The above Figure 18 The bus 614 therein can be a peripheral component interconnect standard (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, only a thick line is used to represent the above Figure 18 but it does not mean that there is only one bus or one type of bus.

[0270] Based on this, an embodiment of this application further provides a communication system, which includes a user equipment and a network device; among them, the user equipment is the above Figure 15 or Figure 16 the downlink control information receiving device provided, and is used to execute the steps of the user equipment in the method embodiments shown above Figure 7 ; the network device is the above Figure 17 or Figure 18 the downlink control information sending device provided, and is used to execute the steps of the network device in the method embodiments shown above Figure 7 .

[0271] An embodiment of this application further provides another communication system, which includes a user equipment and a network device; among them, the user equipment is the aboveFigure 15 or Figure 16 The provided downlink control information receiving device is used to execute the steps of the user equipment in the method embodiments described above; the network device is the above-mentioned Figure 14 shown method embodiment; Figure 17 or Figure 18 The provided downlink control information sending device is used to execute the steps of the network device in the method embodiments described above. Figure 14 shown

[0272] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0273] The units described as separate components may or may not be physically separated. The components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed to multiple different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0274] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0275] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. The readable storage medium can include: various media such as USB flash drives, mobile hard disks, read-only memories, random access memories, magnetic disks, or optical discs that can store program codes. Based on such an understanding, the technical solution of the embodiments of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product.

[0276] In another aspect of the present application, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions run on a device, the device is caused to execute the steps of the user equipment in the method embodiments described above. In another aspect of the present application, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions run on a device, the device is caused to execute the steps of the user equipment in the method embodiments described above. Figure 7 shown Figure 7Steps of the network device in the method embodiments shown.

[0277] In another aspect of the present application, there is provided a computer-readable storage medium storing instructions that, when run on a device, cause the device to perform the steps of the user device in the method embodiments shown above. In another aspect of the present application, there is provided a computer-readable storage medium storing instructions that, when run on a device, cause the device to perform the steps of the network device in the method embodiments shown above. Figure 14 Steps of the user device in the method embodiments shown. In another aspect of the present application, there is provided a computer-readable storage medium storing instructions that, when run on a device, cause the device to perform the steps of the network device in the method embodiments shown above. Figure 14 Steps of the network device in the method embodiments shown.

[0278] In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the user device in the method embodiments shown above. In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the user device in the method embodiments shown above. Figure 7 Steps of the user device in the method embodiments shown. In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the user device in the method embodiments shown above. Figure 14 Steps of the user device in the method embodiments shown.

[0279] In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the network device in the method embodiments shown above. In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the network device in the method embodiments shown above. Figure 7 Steps of the network device in the method embodiments shown. In another aspect of the present application, there is provided a computer program product that, when run on a device, causes the device to perform the steps of the network device in the method embodiments shown above. Figure 14 Steps of the network device in the method embodiments shown.

[0280] Finally, it should be noted that the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A downlink control information receiving method, characterized in that, The method includes: Receiving indication information of a control resource set (CORESET), where the indication information is used to indicate a first quasi - co - location (QCL) assumption and a second QCL assumption, and the CORESET is associated with a first physical downlink control channel (PDCCH) candidate; Wherein, the first PDCCH candidate includes a first control channel element (CCE) and a second CCE, both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; Receiving downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

2. The method according to claim 1, characterized in that, The first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers.

3. The method according to claim 2, wherein The precoding granularity of the CORESET is a resource element group (REG) cluster.

4. The method according to claim 1, characterized in that, The first CCE includes M consecutive CCEs in number, the second CCE includes N consecutive CCEs in number, and the number of CCEs included in the first PDCCH candidate is (M + N).

5. The method according to claim 4, characterized in that The precoding of multiple REG clusters that are frequency - domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency - domain continuous within the second CCE is the same.

6. The method according to claim 1, wherein The first PDCCH candidate is a PDCCH candidate with an aggregation level greater than or equal to a predetermined aggregation level among multiple PDCCH candidates associated with the CORESET.

7. The method according to claim 1, characterized in that The CORESET is associated with two adjacent first PDCCH candidates in the frequency domain, and the first CCEs in the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs in the two first PDCCH candidates are adjacent in the frequency domain.

8. The method according to claim 1, wherein The CORESET is further associated with 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 assumption; or, When the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

9. The method according to claim 1, 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 adopts the first QCL assumption; or, When the 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 adopts the second QCL assumption.

10. The method according to any one of claims 1-9, characterized in that, The CORESET adopts a non - interleaved mapping manner from CCE to REG cluster.

11. A method for receiving downlink control information, characterized in that, The method includes: Receive indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; Wherein, the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, the first REG cluster and the second REG cluster do not overlap and each includes one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster; Receive downlink control information on the first REG cluster and the second REG cluster respectively according to the first QCL assumption and the second QCL assumption.

12. The method according to claim 11, wherein The method further includes: Receive 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.

13. The method according to 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 each one half of the number of REG clusters in the first PDCCH candidate; or, The CORESET adopts an interleaved mapping method from 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 interleaved matrix dimension of the CCE-to-REG cluster mapping.

14. The method according to claim 11, wherein The first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers.

15. The method according to claim 14, characterized in that, The precoding granularity of the CORESET is a REG cluster.

16. The method according to claim 11, wherein Both the first REG cluster and the second REG cluster include multiple consecutively numbered REG clusters.

17. The method according to any one of claims 11-13 or claim 16, characterized in that, The precoding of multiple consecutively numbered REG clusters in the frequency domain within the first REG cluster is the same; and / or, the precoding of multiple consecutively numbered REG clusters in the frequency domain within the second REG cluster is the same.

18. A method for transmitting downlink control information, characterized in that, The method includes: Send indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; Wherein, the first PDCCH candidate includes a first control channel element CCE and a second CCE, both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different, the first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; Send downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

19. The method according to claim 18, wherein The first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers.

20. The method according to claim 19, characterized in that, The precoding granularity of the CORESET is a resource element group REG cluster.

21. The method according to claim 18, characterized in that, The first CCE includes M consecutively numbered CCEs, the second CCE includes N consecutively numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N).

22. The method according to claim 21, wherein The precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same.

23. The method according to claim 18, characterized in that, The first PDCCH candidate is a PDCCH candidate among multiple PDCCH candidates associated with the CORESET and having an aggregation level greater than or equal to a predetermined aggregation level.

24. The method according to claim 18, wherein Two of the first PDCCH candidates associated with the CORESET are adjacent in the frequency domain, and the first CCEs in the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs in the two first PDCCH candidates are adjacent in the frequency domain.

25. The method according to claim 18, wherein The CORESET is further associated with 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 assumption; or, When the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

26. The method according to claim 18, characterized in that, 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 adopts the first QCL assumption; or, When the 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 adopts the second QCL assumption.

27. The method according to any one of claims 18-26, characterized in that, The CORESET adopts a non-interleaved mapping manner from CCE to REG cluster.

28. A method for transmitting downlink control information, characterized in that The method includes: Sending indication information of a control resource set CORESET, where the indication information is used to indicate a first QCL assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; Wherein, the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, the first REG cluster and the second REG cluster do not overlap and both include one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster; Sending downlink control information on the first REG cluster and the second REG cluster respectively according to the first QCL assumption and the second QCL assumption.

29. The method according to claim 28, wherein, The method further includes: Sending 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.

30. The method according to claim 28, 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, The CORESET adopts an interleaved mapping method from REG clusters to control channel elements CCEs. 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 the interleaved matrix for CCE to REG cluster mapping.

31. The method according to claim 28, wherein The first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers.

32. The method according to claim 31, wherein The precoding granularity of the CORESET is a REG cluster.

33. The method according to claim 28, wherein Both the first REG cluster and the second REG cluster include a plurality of consecutively numbered REG clusters.

34. The method according to any one of claims 28 - 30 or claim 33, characterized in that, The precodings of a plurality of frequency-domain consecutive REG clusters within the first REG cluster are the same; and / or, the precodings of a plurality of frequency-domain consecutive REG clusters within the second REG cluster are the same.

35. A downlink control information receiving device, characterized in that, 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 assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; wherein, the first PDCCH candidate includes a first control channel element CCE and a second CCE. Both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different. The first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; the receiving unit is further configured to receive downlink control information on the first CCE and the second CCE respectively according to the first QCL assumption and the second QCL assumption.

36. The device according to claim 35, characterized in that, The first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers.

37. The apparatus according to claim 36, wherein The precoding granularity of the CORESET is a resource element group REG cluster.

38. The device according to claim 35, characterized in that, The first CCE includes M consecutively numbered CCEs, the second CCE includes N consecutively numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N).

39. The device according to claim 38, wherein, The precodings of a plurality of frequency-domain consecutive REG clusters within the first CCE are the same; and / or, the precodings of a plurality of frequency-domain consecutive REG clusters within the second CCE are the same.

40. The device according to claim 35, wherein, The first PDCCH candidate is a PDCCH candidate among the multiple PDCCH candidates associated with the CORESET whose aggregation level is greater than or equal to a predetermined aggregation level.

41. The device according to claim 35, characterized in that, The CORESET is associated with two adjacent first PDCCH candidates in the frequency domain. The first CCEs in the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs in the two first PDCCH candidates are adjacent in the frequency domain.

42. The device according to claim 35, characterized in that, The CORESET is further associated with 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 assumption; or, When the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

43. The device according to claim 35, characterized in that, 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 adopts the first QCL assumption; or, When the 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 adopts the second QCL assumption.

44. The device according to any one of claims 35 - 43, characterized in that, The CORESET adopts a non-interleaved mapping manner from CCE to REG cluster.

45. A downlink control information receiving device, characterized in that, 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 assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; wherein the first PDCCH candidate includes a first resource element group REG cluster and a second REG cluster, the first REG cluster and the second REG cluster do not overlap and both include one or more REG clusters, the first QCL assumption corresponds to the first REG cluster, and the second QCL assumption 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 respectively according to the first QCL assumption and the second QCL assumption.

46. The device according to claim 45, characterized in that, The receiving unit is further configured to: receive 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.

47. The device according to claim 45, characterized in that 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 each one half of the number of REG clusters in the first PDCCH candidate; or, The CORESET adopts an interleaved mapping manner from REG cluster to 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 the interleaved matrix dimension of the CCE-to-REG cluster mapping.

48. The device according to claim 45, characterized in that, The first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers.

49. The device according to claim 48, wherein, The precoding granularity of the CORESET is a REG cluster.

50. The device according to claim 45, characterized in that, Both the first REG cluster and the second REG cluster include a plurality of consecutively numbered REG clusters.

51. The device according to any one of claims 45 to 47 or claim 50, characterized in that, The precoding of a plurality of frequency-domain continuous REG clusters within the first REG cluster is the same; and / or, the precoding of a plurality of frequency-domain continuous REG clusters within the second REG cluster is the same.

52. A downlink control information transmission device, characterized in that, The apparatus includes: 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 assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; Among them, the first PDCCH candidate includes a first control channel element CCE and a second CCE. Both the first CCE and the second CCE include one or more CCEs and the CCE numbers included in the first CCE and the second CCE are different. The first QCL assumption corresponds to the first CCE, and the second QCL assumption corresponds to the second CCE; The sending unit is further configured to respectively send downlink control information on the first CCE and the second CCE according to the first QCL assumption and the second QCL assumption.

53. The apparatus according to claim 52, wherein, The first CCE includes CCEs with odd numbers, and the second CCE includes CCEs with even numbers.

54. The device according to claim 53, characterized in that The precoding granularity of the CORESET is a resource element group REG cluster.

55. The device according to claim 52, characterized in that, The first CCE includes M consecutive-numbered CCEs, the second CCE includes N consecutive-numbered CCEs, and the number of CCEs included in the first PDCCH candidate is (M + N).

56. The device according to claim 55, characterized in that, The precoding of multiple REG clusters that are frequency-domain continuous within the first CCE is the same; and / or, the precoding of multiple REG clusters that are frequency-domain continuous within the second CCE is the same.

57. The device according to claim 52, characterized in that, The first PDCCH candidate is a PDCCH candidate among multiple PDCCH candidates associated with the CORESET whose aggregation level is greater than or equal to a predetermined aggregation level.

58. The device according to claim 52, characterized in that, The CORESET is associated with two adjacent first PDCCH candidates in the frequency domain. The first CCEs in the two first PDCCH candidates are adjacent in the frequency domain, or the second CCEs in the two first PDCCH candidates are adjacent in the frequency domain.

59. The device according to claim 52, characterized in that, The CORESET is further associated with 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 assumption; or, When the CCE of the second PDCCH candidate is adjacent to the second CCE, the second PDCCH candidate corresponds to the second QCL assumption.

60. The device according to claim 52, characterized in that, 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 adopts the first QCL assumption; or, When the 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 adopts the second QCL assumption.

61. The device according to any one of claims 52 - 60, characterized in that, The CORESET adopts a non-interleaved mapping method from CCE to REG cluster.

62. A downlink control information transmission device, characterized in that, The device includes: 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 assumption and a second QCL assumption, and the CORESET is associated with a first PDCCH candidate; Among them, the first PDCCH candidate includes a first resource element group (REG) cluster and a second REG cluster. The first REG cluster and the second REG cluster do not overlap and each includes one or more REG clusters. The first QCL assumption corresponds to the first REG cluster, and the second QCL assumption corresponds to the second REG cluster; The sending unit is further configured to respectively send downlink control information on the first REG cluster and the second REG cluster according to the first QCL assumption and the second QCL assumption.

63. The device according to claim 62, wherein, The sending unit is further configured to: Send 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.

64. The device according to claim 62, characterized in that, 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 each one half of the number of REG clusters in the first PDCCH candidate; or The CORESET adopts an interleaved mapping manner from 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 of the CCE-to-REG cluster mapping.

65. The device according to claim 62, characterized in that, The first REG cluster includes REG clusters with odd numbers, and the second REG cluster includes REG clusters with even numbers.

66. The device according to claim 65, characterized in that, The precoding granularity of the CORESET is a REG cluster.

67. The device according to claim 62, characterized in that, Both the first REG cluster and the second REG cluster include a plurality of consecutively numbered REG clusters.

68. The device according to any one of claims 62 - 64 or claim 67, characterized in that, The precoding of a plurality of frequency-domain continuous REG clusters within the first REG cluster is the same; and / or the precoding of a plurality of frequency-domain continuous REG clusters within the second REG cluster is the same.

69. A computer-readable storage medium, characterized in that, For storing instructions, when the instructions are run by a computer, the computer is caused to execute the method according to any one of claims 1-10, the method according to any one of claims 11-17, the method according to any one of claims 18-27, or the method according to any one of claims 28-34.

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