CN116803169A

CN116803169A - Method for monitoring PDCCH in multi-TRP system

Info

Publication number: CN116803169A
Application number: CN202180090765.7A
Authority: CN
Inventors: 黎添; 生嘉
Original assignee: JRD Communication Shenzhen Ltd
Current assignee: JRD Communication Shenzhen Ltd
Priority date: 2021-01-16
Filing date: 2021-01-16
Publication date: 2023-09-22
Also published as: WO2022151452A1

Abstract

The application provides a method for monitoring PDCCH in a multi-TRP system, which comprises the following steps: acquiring PDCCH candidates according to the search space and the corresponding control resource set CORESET; blind decoding is carried out on the PDCCH candidates to obtain successfully decoded first PDCCH candidates, wherein a search space comprising the first PDCCH candidates is a first search space set; monitoring other search space sets one by one according to the relation between the search space sets or the relation between the CORESET until the maximum preset value is reached; or monitoring other search space sets one by one according to the related information of the first PDCCH candidate until the maximum preset value is reached. By the method, the UE can prioritize the monitoring sequence of the rest other search space sets within the monitoring range of the maximum preset value according to the implementation condition so as to realize the maximum resource utilization.

Description

Method for monitoring PDCCH in multi-TRP system

[ field of technology ]

The disclosed embodiments of the present application relate to the field of communication technologies, and more particularly, to a method for monitoring PDCCH in a multi-TRP system and a user equipment.

[ background Art ]

The User Equipment (UE) needs to know the location of the physical downlink control channel (PDCCH: physical Downlink Control Channel) in the frequency domain and the location in the time domain in order to successfully decode the PDCCH. In a New air interface (NR: new Radio) system, information such as frequency domain resource information of a PDCCH and the number of orthogonal frequency division multiplexing (OFDM: orthogonal Frequency Division Multiplexing) symbols occupied by a time domain are packaged in a control resource set (CORESET: control Resource Set), and information such as a PDCCH starting OFDM symbol, a monitoring period, an associated CORESET and the like are packaged in a Search Space (SS). After the UE determines the candidate time-frequency positions of the PDCCH according to the search space and the CORESET configuration, the resources of the candidates are called PDCCH candidates. And performing Polar decoding and cyclic redundancy check (CRC: cyclic Redundancy Check) on each candidate PDCCH, and when the CRC passes, indicating that the demodulation of the current candidate PDCCH is successful.

Considering UE capability and reducing UE blind detection complexity, the maximum PDCCH candidate number and Non-overlapping (Non-Overlapped) control channel unit (CCE: control Channel Element) number monitored in each time Slot (Slot)/Span (Span) are limited in the protocol. Therefore, if the number of PDCCH candidates and non-overlapping CCEs exceeds the limit, only a portion of the set of search spaces can be selected for monitoring among all the sets of search spaces configured for the UE.

Since a PDCCH channel may be blocked from a Transmission/Reception node (TRP) to a UE, it is necessary to enhance the reliability of the PDCCH channel. As shown in fig. 1, a plurality of PDCCHs (i.e., PDCCH1 and PDCCH 2) are transmitted from a plurality of TRPs to one UE, the PDCCHs are transmitted using different beams, and the same resource allocation information is indicated for scheduling one physical downlink shared channel (PDSCH: physical Downlink Share Channel)/physical uplink shared channel (PUSCH: physical Uplink Share Channel) or the like, and the PDCCH can enhance its reliability through a multi-TRP system transmission.

PDCCH transmission is enhanced in a Non-SFN (Non-Single Frequency Network) system, a repetition transmission is supported to be connected with two PDCCH candidates in a display, and the maximum number of PDCCH candidates having a connection relationship is 2, but in this system, a limitation of the blind decoding number of PDCCH candidates is not further defined, that is, in a Non-SFN (Non-Single Frequency Network) system, if the number of CCEs with Non-overlapping PDCCH candidates exceeds the limitation, how to select a partial search space set to monitor in all search space sets configured for UEs.

[ application ]

According to an embodiment of the present application, the present application provides a method for monitoring PDCCH in a multi-TRP system to solve the above technical problems.

According to a first aspect of the present application, there is provided a method for monitoring a PDCCH in a multi-TRP system, the method comprising: acquiring PDCCH candidates by the root search space and the corresponding CORESET; blind decoding is carried out on the PDCCH candidates to obtain successfully decoded first PDCCH candidates, wherein a search space comprising the first PDCCH candidates is a first search space set, the first PDCCH candidates have explicit connection relation with the first PDCCH candidates, the CORESET of the first PDCCH candidates is decoded to be the first CORESET; monitoring other search space sets one by one according to the relation between the search space sets or the relation between the CORESET until the maximum preset value is reached; or monitoring other search space sets one by one according to the related information of the first PDCCH candidate until the maximum preset value is reached.

According to another aspect of the present application there is provided a user equipment comprising a processor and a communication circuit, the processor being connected to the communication circuit; the processor is configured to perform the monitoring method as described in the first aspect.

According to a further aspect of the present application there is provided a user equipment having stored instructions which when executed implement the monitoring method of the first aspect.

The beneficial effects of the application are as follows: the PDCCH candidates are obtained according to the search space and the corresponding control resource set CORESET; blind decoding is carried out on the PDCCH candidates to obtain successfully decoded first PDCCH candidates, wherein a search space comprising the first PDCCH candidates is a first search space set, and the first PDCCH candidates have explicit connection relation with the second PDCCH candidates; a second set of search spaces including a second PDCCH, derived from a specific relationship between the first set of search spaces and another set of search spaces, or a second set of search spaces including a second PDCCH candidate, derived from a specific relationship between CORESET and another CORESET for the decoded first PDCCH candidate. The UE may further perform priority ranking monitoring on the remaining search space set based on the second search space set or the second PDCCH candidate by using a second PDCCH candidate obtained according to the related information of the first PDCCH candidate until reaching a preset maximum value monitored by the UE, so that the UE may perform decoding reception according to whether the second PDCCH candidate is required, and may perform priority ranking on monitoring sequences of the remaining other search space sets within a monitoring range of the maximum preset value, so as to achieve maximum resource utilization.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is a schematic diagram of a transmission principle of a PDCCH channel in a multi-TRP system;

FIG. 2 is a schematic flow chart of an embodiment of the monitoring method of the present application;

FIG. 3 is a diagram of search space and PDCCH candidates according to an embodiment of the monitoring method of the present application;

FIG. 4 is a diagram of search space and PDCCH candidates according to another embodiment of the monitoring method according to the present application;

fig. 5 is a schematic diagram of search space and PDCCH candidates according to another embodiment of the monitoring method of the present application;

fig. 6 is a schematic structural diagram of a ue according to an embodiment of the present application for performing a monitoring method;

fig. 7 is a schematic storage diagram of a ue according to an embodiment of the present application for performing the monitoring method.

[ detailed description ] of the application

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

The application provides a method for monitoring PDCCH in a multi-TRP system. Referring to fig. 2, fig. 2 is a flow chart of a monitoring method according to an embodiment of the application. The monitoring method comprises the following steps:

s100: and acquiring PDCCH candidates according to the search space and the corresponding CORESET.

The CORESET comprises information such as frequency domain resource information of the PDCCH and the number of OFDM symbols occupied by the time domain, the search space comprises information such as a starting OFDM symbol of the PDCCH, a listening period, an associated CORESET and the like, and the CORESET comprises information such as frequency domain resource information of the PDCCH and the number of OFDM symbols occupied by the time domain. The UE acquires the search space information and CORESET information through radio resource control (Radio Resource Control, RRC). And further, the candidate time-frequency position of the PDCCH is determined through the search space information and the information configuration of CORESET, namely the PDCCH is a PDCCH candidate, and the number of the PDCCH candidates can be multiple.

S200: and performing blind decoding on the PDCCH candidates to obtain successfully decoded first PDCCH candidates, wherein a search space comprising the first PDCCH candidates is a first search space set, and the first PDCCH candidates have an explicit connection relation with the second PDCCH candidates.

The blind decoding of the plurality of PDCCH candidates comprises Polar decoding and cyclic redundancy check of each PDCCH candidate, and the successful cyclic redundancy check is successful decoding. The first PDCCH candidate that is successfully decoded is referred to as the first PDCCH candidate. The search space including the first PDCCH candidate is referred to as a first search space set, and the first search space set may further include other PDCCH candidates.

The coding bits and DCI payload of two PDCCH candidates transmitted from the multi-TRP system are the same, and the first PDCCH candidate has an explicit connection relation with the second PDCCH candidate.

S300: monitoring other search space sets one by one according to the relation between the search space sets or the relation between the CORESET until the maximum preset value is reached; or monitoring other search space sets one by one according to the related information of the first PDCCH candidate until the maximum preset value is reached.

Specifically, the second search space set including the second PDCCH may be derived by a specific relationship between the first search space set and another search space set, or may be derived by a specific relationship between CORESET and another CORESET for the decoded first PDCCH candidate. Of course, the second PDCCH candidate may also be obtained according to the related information of the first PDCCH candidate, and then the remaining search space set or PDCCH candidate is monitored in a prioritized manner based on the second search space set or the second PDCCH candidate until reaching the preset maximum value monitored by the UE. Therefore, the UE can carry out priority ordering on the rest other search space sets or the monitoring sequence of the PDCCH candidates within the monitoring range of the maximum preset value according to whether the second PDCCH candidate needs decoding and receiving or not so as to realize the maximum resource utilization.

In an embodiment, the maximum preset value is the maximum number of PDCCH candidates monitored in each slot or span and the maximum number of non-overlapping control channel elements CCEs. The maximum number of slot-based or span-based PDCCH candidates and the maximum number of non-overlapping control channel elements CCEs are configured by higher layer parameters. When the UE is configured with the higher layer parameter monitoringcapability config-r16 and the value of the parameter is r15monitoringcapability, or the UE is not configured with the higher layer parameter monitoringcapability config-r16, the UE monitors using the maximum PDCCH candidate and the non-overlapping CCE number based on the time slot unit. When the UE is configured with a higher layer parameter monitoringcapability config-r16 and the value of this parameter is another higher layer parameter r16monitoringcapability, then the UE monitors using the maximum PDCCH candidates in Span-based units and the number of non-overlapping CCEs. Taking time slots as an example, the following table shows:

TABLE 1

Table 1 is the maximum number of PDCCH candidates monitored per slotThe maximum number in table 1 is under one downlink partial Bandwidth (BWP: bandwidth Part) condition of a single cell and having a subcarrier Spacing (SCS: sub-Carrier Spacing) configuration μ. Wherein, when the value of mu is 0, 1, 2 and 3, the subcarrier intervals are respectively 15kHz, 30kHz, 60kHz and 120kHz. Within a certain downlink portion of bandwidth, the smaller the subcarrier spacing, the greater the number of PDCCH candidates that can be monitored per slot.

TABLE 2

Table 2 is the maximum number of non-overlapping CCEs per slotThe maximum number in table 2 is under one downlink partial Bandwidth (BWP: bandwidth Part) condition of a single cell and having a subcarrier Spacing (SCS: sub-Carrier Spacing) configuration μ. Wherein, when the value of mu is 0, 1, 2 and 3, the subcarrier intervals are 15kHz, 30kHz, 60kHz and 1 respectively20kHz. The smaller the subcarrier spacing, the greater the number of non-overlapping CCEs that can be monitored per slot within a determined downlink portion bandwidth.

In one embodiment, monitoring other search space sets one by one according to the relationship between the search space sets or between CORESET until the maximum preset value is reached may include the following implementation cases.

Since the repetition scheme is adopted in PDCCH reliability enhancement, namely: the coded bits and DCI Payload (Payload) of two PDCCH candidates transmitted from the plurality of TRPs are identical, and thus, if the first PDCCH candidate is successfully decoded, the priority of the second search space set containing the second PDCCH candidate may be set to a low priority in order to save resources.

In one embodiment, the monitoring may be performed in a scheme of last monitoring a second set of search spaces among the set of homogeneous search spaces, including:

s310: a second set of search spaces including a second PDCCH candidate is obtained from the first set of search spaces or the first CORESET, wherein the first set of search spaces and the second set of search spaces are the same type of set of search spaces.

The second search space set obtained through the first search space set or the first core is the same as the above, and a repeated description will not be given here, so that the code bits and DCI loads (Payload) of two PDCCH candidates transmitted from the plurality of TRPs are the same, and thus the first search space set including the first PDCCH candidate and the second search space set including the second PDCCH candidate are the same type of search space set. As if it were a common set of search spaces or as if it were a set of search spaces for UEs.

S311: and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second search space set is finally monitored in the search space set of the same type.

Since the control messages carried by the PDCCHs in the common search space set are more important than the control messages carried by the PDCCHs in the UE-level search space set, the common search space set has a higher priority than the UE-level search space set. Whether the second set of search spaces belongs to the common set of search spaces or the UE-level set of search spaces, the second set of search spaces has the lowest priority among the sets of search spaces of the same type, but is of a higher priority than the UE-level set of search spaces if the second set of search spaces belongs to the common set of search spaces.

Specifically, the first search space set and the second search space set belong to a common search space set, and then the priority of the second search space set is the lowest of all the common search space sets, and the UE monitors from small to large according to the index value of the common search space set. If all the common search space sets have been monitored except the second search space set and the PDCCH candidate and non-overlapping CCE number maximum limit is not reached, the UE will monitor the second search space set. If the maximum number limit is still not reached, monitoring from small to large according to the UE-level search space set index value until the maximum number limit is reached.

Alternatively, the first set of search spaces and the second set of search spaces both belong to the UE-level set of search spaces, and the priority of the second set of search spaces is the lowest of all the UE-level sets of search spaces. And the UE monitors the public search space set firstly, if all the public search space sets are monitored to not reach the maximum limit of the PDCCH candidate and non-overlapping CCE numbers, the second search space set is selected from the UE-level search space sets, the rest UE-level search space sets are monitored from small to large according to the index value of the UE-level search space set until the maximum limit of the PDCCH candidate and the non-overlapping CCE numbers is reached, and finally the second search space set is monitored.

For example, referring to fig. 3, the first PDCCH candidate belongs to COM SS Set #0, the second PDCCH candidate belongs to COM SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of COM SS Set #0, COM SS Set #1, COM SS Set #3, COM SS Set #2, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached.

In an embodiment, monitoring may be performed by a scheme that does not monitor the second set of search spaces any more while monitoring other search spaces, including:

s320: and acquiring a second search space set comprising the second PDCCH candidate according to the first search space set or the first CORESET, wherein the first search space set and the second search space set are the same type of search space set.

The second set of search spaces is obtained by the first set of search spaces or the first CORESET as described above and will not be repeated here.

S321: and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second search space set is not monitored.

Specifically, the first search space and the second search space set belong to a common search space set or a UE-level search space set, and the second search space set is directly sorted out, and the second search space set is not monitored any more. In the remaining search space sets, the search space sets are monitored from small to large according to the index value of the search space set in each type of search space set in the order of firstly carrying out common search space set and then carrying out UE level search space set until the maximum limit of the number of PDCCH candidates and non-overlapping CCEs is reached.

For example, as shown in fig. 3, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #1, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached.

Of course, the coded bits of two PDCCH candidates transmitted from the plurality of TRPs are the same as the DCI payload, and it may be necessary to combine the two PDCCH candidates and then decode the combined PDCCH. Therefore, it is necessary to ensure that both PDCCH candidates are monitored and decoded.

In another embodiment, the monitoring may be performed in a higher priority scheme of the second set of search spaces, comprising:

s330: a second set of search spaces including a second PDCCH candidate is obtained from the first set of search spaces or the first CORESET, wherein the first set of search spaces and the second set of search spaces are the same type of set of search spaces.

S331: after the first search space set is monitored, the second search space set is preferentially monitored.

The first search space set and the second search space set belong to a common search space set or a UE-level search space set, and after the first PDCCH candidate is successfully decoded, monitoring of the first search space set is continuously completed, and if the maximum number limit is not reached, the second search space set is preferentially monitored.

S332: and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type.

After the second search space set is monitored, the remaining search space sets except the second search space set are continuously monitored, wherein the search space sets are monitored from small to large according to the index value of the search space set in each type of search space set according to the sequence of the common search space set and the UE-level search space set, until the maximum limit of the number of PDCCH candidate non-overlapping CCE is reached.

For example, as shown in fig. 3, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #2, com SS Set #1, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached.

In yet another embodiment, monitoring other search space sets one by one according to the related information of the first PDCCH candidate until the maximum preset value is reached may include the following several implementation cases. The related information of the first PDCCH candidate is connection relation information, and the connection relation information comprises a control channel unit starting position, a PDCCH candidate index value and an aggregation level.

The coded bits and DCI payload of two PDCCH candidates transmitted from the plurality of TRPs are identical, and thus, if the first PDCCH candidate is successfully decoded, the second PDCCH candidate decoding priority may be set to a low priority in order to maximize resource utilization.

In an embodiment, the monitoring may be performed according to a scheme of last monitoring the second PDCCH candidate in the homogeneous search space set, which includes:

s340: and acquiring a second PDCCH candidate according to the related information of the first PDCCH candidate.

As described above, the related information of the first PDCCH candidate may include a control channel element start position, a PDCCH candidate index value and an aggregation level, and the second PDCCH candidate having an explicit connection relationship with the first PDCCH candidate may have one or more of the same control channel element start position, PDCCH candidate index value and aggregation level, and the UE may directly monitor the second PDCCH candidate according to the information.

S341: and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are finally monitored in the search space set of the same type.

Specifically, when the first search space set and the second search space set both belong to a common search space set, after the first PDCCH candidate is monitored, the second PDCCH candidate is picked out from the second search space set according to an explicit connection relation between the first PDCCH candidate and the second PDCCH candidate, and is monitored after all the common search space sets are placed. The UE monitors from small to large according to the common search space set index value and if the second search space set is monitored, does not monitor the second PDCCH candidate. If all the common search space sets have been monitored except for the second PDCCH candidates contained in the second search space set and the maximum number limit of PDCCH candidates and non-overlapping CCEs is not reached, the UE will monitor the second PDCCH candidates contained in the second search space set. If the maximum number limit is still not reached, monitoring from small to large according to the UE-level search space set index value until the maximum number limit is reached.

When the first search space set and the second search space set belong to the UE-level search space set, after the first PDCCH candidate is monitored, the second PDCCH candidate is picked out from the second search space set according to the explicit connection relation between the first PDCCH candidate and the second PDCCH candidate, and is monitored after the second PDCCH candidate is put into all the UE-level search space sets. The UE monitors the public search space set firstly, and if all public search space sets are monitored to not reach the maximum limit of the PDCCH candidate and non-overlapping CCE number, the rest UE-level search space sets are monitored from small to large according to the index value of the UE-level search space set until reaching the maximum limit of the number. Wherein the second PDCCH candidate is not monitored when the second set of search spaces is monitored.

For example, referring to FIG. 4, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate (i.e., PDCCH candidate # 3) belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #1, com SS Set #2, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, and UE SS Set #3 until the maximum number limit is reached. If Com SS set#2 is monitored, PDCCH candidate #0, PDCCH candidate #1, and PDCCH candidate #2 are monitored first, and PDCCH candidate #3 is not monitored. If the maximum number limit is not reached after the Com SS Set #3 is monitored, the PDCCH candidate #3 is monitored.

In another embodiment, when monitoring other sets of search spaces, a scheme is monitored that does not monitor the second PDCCH candidate, comprising:

s350: and acquiring second PDCCH candidate related information according to the related information of the first PDCCH candidate.

Acquiring the second PDCCH candidate related information according to the first PDCCH candidate related information is the same as described above, and will not be described here.

S351: and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are not monitored.

Specifically, the first PDCCH candidate is decoded and monitoring of the first set of search spaces continues. When the maximum number limit of PDCCH candidates and non-overlapping CCEs is not reached after the first search space set is monitored, continuing to monitor remaining search space sets in which the order of the first common search space set and then the UE-level search space set is followed, and in each type of search space set, monitoring from small to large according to the search space set index value until the maximum number limit is reached. Wherein if the second set of search spaces is monitored, the second PDCCH candidate is not monitored.

For example, as shown in FIG. 4, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate (i.e., PDCCH candidate # 3) belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #1, com SS Set #2, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached. If Com SS set#2 is monitored, only PDCCH candidate #0, PDCCH candidate #1, and PDCCH candidate #2 are monitored, and PDCCH candidate #3 is not monitored.

Of course, in performing other search space monitoring based on the related information of the first PDCCH candidate, it may be necessary to monitor and combine the two PDCCH candidates, and then decode the combined PDCCH. Therefore, it is necessary to ensure that both PDCCH candidates are monitored and decoded, and the second PDCCH candidate decoding priority may be set to a higher priority.

In an embodiment, the monitoring may be performed according to a scheme of preferentially monitoring the second PDCCH candidate in the second search space, which includes:

s360: and acquiring second PDCCH candidate related information according to the related information of the first PDCCH candidate.

S361: other PDCCH candidates of a first search space containing the first PDCCH candidate are monitored.

After the first PDCCH candidate is successfully decoded, monitoring for other PDCCH candidates of the first search space continues.

S362: and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from the small index value to the large index value when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are monitored preferentially when the second search space set containing the second PDCCH candidates is monitored.

When the maximum number limit of PDCCH candidates and non-overlapping CCEs is not reached after the first search space set is monitored, continuing to monitor remaining search space sets in which the order of the first common search space set and then the UE-level search space set is followed, and in each type of search space set, monitoring from small to large according to the search space set index value until the maximum number limit is reached. And when the second search space set is monitored, the second PDCCH candidates are preferentially monitored, and then other PDCCH candidates in the second search space set are monitored.

For example, as shown in FIG. 4, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate (i.e., PDCCH candidate # 3) belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #1, com SS Set #2, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached. If Com SS Set #2 is monitored, PDCCH candidate #3 (i.e., the second PDCCH candidate) is monitored preferentially, and PDCCH candidate #0, PDCCH candidate #1, and PDCCH candidate #2 are monitored again.

In another embodiment, the monitoring may be performed according to a method of preferentially monitoring a second set of search spaces, in which a second PDCCH candidate is preferentially monitored, the method comprising:

s370: and acquiring second PDCCH candidate related information according to the related information of the first PDCCH candidate.

S371: other PDCCH candidates of a first search space containing the first PDCCH candidate are monitored.

S372: after monitoring the second PDCCH candidate, other PDCCH candidates in a second search space set comprising the second PDCCH candidate are monitored.

After monitoring the other PDCCH candidates in the first search space is completed, if the preset maximum value is not reached, the second search space set is monitored preferentially according to the explicit connection relation between the first PDCCH candidate and the second PDCCH candidate, the second PDCCH candidate is monitored preferentially in the second search space set according to the connection relation, and the other PDCCH candidates in the second search space set are monitored again.

S373: and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type.

When the maximum number limit is not reached after the second search space set is monitored, continuing to monitor remaining search space sets other than the second search space set, wherein the remaining search space sets are monitored from small to large according to search space set index values in order of common search space set first and then UE-level search space set, and wherein the maximum number limit is reached in each type of search space set.

As shown in fig. 4, the first PDCCH candidate belongs to Com SS Set #0, the second PDCCH candidate (i.e., PDCCH candidate # 3) belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relation with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0, com SS Set #2, com SS Set #1, com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, UE SS Set #3 until the maximum number limit is reached. If Com SS Set #2 is monitored, PDCCH candidate #3 (i.e., second PDCCH candidate) is preferentially monitored, and PDCCH candidate #0, PDCCH candidate #1, and PDCCH candidate #2 are monitored.

In yet another embodiment, the monitoring of the other search space set may be performed according to a monitoring scheme that monitors the second PDCCH candidate preferentially after the first PDCCH candidate is resolved, the method comprising:

s380: and acquiring second PDCCH candidate related information according to the related information of the first PDCCH candidate.

S381: the second PDCCH candidate is monitored.

After the first PDCCH is successfully decoded, monitoring the first search space set is suspended, and the second PDCCH candidate in the second search space is preferentially monitored according to the explicit connection relation between the first PDCCH candidate and the second PDCCH candidate.

S382: other PDCCH candidates of a first set of search spaces including a first PDCCH candidate are monitored.

And when the maximum number limit of the PDCCH candidates and the non-overlapping CCE number is not reached after the second PDCCH candidates are monitored, continuing to monitor the remaining PDCCH candidates in the first search space set.

S383: and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type.

When the maximum number limit is not reached after the monitoring of other PDCCH candidates of the first search space set is completed, continuing to monitor remaining search space sets other than the first search space set, in which the search space sets are monitored in order of a common search space set first and a UE-level search space set, and in each type of search space set, from small to large according to the search space set index value until the maximum number limit is reached. If the second search space set is monitored, the second PDCCH candidate is not monitored any more, and other PDCCH candidates in the second search space set are directly monitored.

For example, referring to FIG. 5, the first PDCCH candidate (i.e., PDCCH candidate # 1) belongs to Com SS Set #0, the second PDCCH candidate (i.e., PDCCH candidate # 3) belongs to Com SS Set #2, and the first PDCCH candidate has an explicit connection relationship with the second PDCCH candidate, and the search space is monitored in the order of Com SS Set #0 (before the first PDCCH candidate), com SS Set #2 (after the second PDCCH candidate), com SS Set #0 (after the first PDCCH candidate), com SS Set #1, com SS Set #2 (except the second PDCCH candidate), com SS Set #3, UE SS Set #0, UE SS Set #1, UE SS Set #2, and UE SS Set #3 until the maximum number limit is reached. The monitoring orders of the PDCCH candidates in Com SS Set #0 are PDCCH candidate #0, PDCCH candidate #1 (i.e., first PDCCH candidate), PDCCH candidate #3 (i.e., second PDCCH candidate) in Com SS Set #2, PDCCH candidate #2 and PDCCH candidate #3. If Com SS Set #2 is monitored, the monitoring order of the PDCCH candidates is PDCCH candidate #0, PDCCH candidate #1, PDCCH candidate #2, and PDCCH candidate #3 is no longer monitored.

The application also provides user equipment for executing the monitoring method. Referring to fig. 6, the user equipment 10 includes a processor 12 and a communication circuit 11; the processor 12 is connected to the communication circuit 11, and the processor 12 is configured to execute instructions to implement the above-mentioned monitoring method.

The processor 12 may also be referred to as a CPU (Central Processing Unit ). The processor 12 may be an integrated circuit chip having signal processing capabilities. Processor 12 may also be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. A general purpose processor may be a microprocessor or the processor 12 may be any conventional processor or the like.

Referring to fig. 7, fig. 7 is a schematic diagram of a storage structure of a ue in an embodiment of the present application. The user equipment 20 of the embodiments of the present application stores instructions/program data 21 which, when executed, implements the methods provided by any of the embodiments of the monitoring method of the present application, as well as any non-conflicting combinations. The instructions/program data 21 may form a program file stored in the storage medium of the above-mentioned user equipment or base station 20 in the form of a software product, so that a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) performs all or part of the steps of the methods according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, an optical disk, or other various media capable of storing program codes, or a terminal device such as a computer, a server, a mobile phone, a tablet, or the like.

In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of elements is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., multiple elements or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.

In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

The foregoing is only the embodiments of the present application, and therefore, the patent scope of the application is not limited thereto, and all equivalent structures or equivalent processes using the descriptions of the present application and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the application.

Claims

A method for monitoring a physical downlink control channel, PDCCH, in a multi-transmission receiving node, TRP, system, the method comprising:

acquiring PDCCH candidates according to the search space and the corresponding control resource set CORESET;

blind decoding is carried out on the PDCCH candidates to obtain successfully decoded first PDCCH candidates, wherein a search space comprising the first PDCCH candidates is a first search space set, the first PDCCH candidates have an explicit connection relation with the first PDCCH candidates, the CORESET of the first PDCCH candidates is decoded to be a first CORESET;

monitoring other search space sets one by one according to the relation between the search space sets or the relation between the CORESET until the maximum preset value is reached;

or monitoring other search space sets one by one according to the related information of the first PDCCH candidate until the maximum preset value is reached.
The method of claim 1, wherein the maximum preset value is a maximum number of PDCCH candidates monitored in each slot or span and a maximum number of non-overlapping control channel element CCEs.
The method of claim 1, wherein monitoring the other search space sets one by one according to the relationship of the search space sets until a maximum preset value is reached further comprises:

acquiring a second search space set comprising the second PDCCH candidate according to the first search space set or the first CORESET, wherein the first search space set and the second search space set are the same type of search space set;

and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second search space set is finally monitored in the search space set of the same type.
The method of claim 1, wherein monitoring the other search space sets one by one according to the relationship of the search space sets until a maximum preset value is reached further comprises:

acquiring a second search space set comprising the second PDCCH candidate according to the first search space set or the first CORESET, wherein the first search space set and the second search space set are the same type of search space set;

and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second search space set is not monitored.
The method of claim 1, wherein monitoring the other search space sets one by one according to the relationship of the search space sets until a maximum preset value is reached further comprises:

acquiring a second search space set comprising the second PDCCH candidate according to the first search space set or the first CORESET, wherein the first search space set and the second search space set are the same type of search space set;

after the first search space set is monitored, the second search space set is preferentially monitored;

and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type.
The method of claim 1, wherein the information related to the first PDCCH candidate is connection relation information, the connection relation information comprising: control channel element start position, PDCCH candidate index value and aggregation level.
The method of claim 6 wherein monitoring the other search space sets one by one based on the information related to the first PDCCH candidate until the maximum preset value is reached further comprises: control channel unit

Acquiring the second PDCCH candidate related information according to the related information of the first PDCCH candidate;

and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are finally monitored in the search space set of the same type.
The method of claim 6 wherein monitoring the other search space sets one by one based on the information related to the first PDCCH candidate until the maximum preset value is reached further comprises:

acquiring the second PDCCH candidate related information according to the related information of the first PDCCH candidate;

and monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are not monitored.
The method of claim 6 wherein monitoring the other search space sets one by one based on the information related to the first PDCCH candidate until the maximum preset value is reached further comprises:

acquiring the second PDCCH candidate related information according to the related information of the first PDCCH candidate;

monitoring other PDCCH candidates comprising a first search space of the first PDCCH candidate;

and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from the small index value to the large index value when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are preferentially monitored when the second search space set containing the second PDCCH candidates is monitored.
The method of claim 6 wherein monitoring the other search space sets one by one based on the information related to the first PDCCH candidate until the maximum preset value is reached further comprises:

acquiring the second PDCCH candidate related information according to the related information of the first PDCCH candidate;

monitoring other PDCCH candidates of a first search space set comprising the first PDCCH candidate;

monitoring the second PDCCH candidate;

monitoring other PDCCH candidates in a second search space set comprising the second PDCCH candidate;

and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from small index values to large index values when the monitoring is carried out in the search space set of the same type.
The method of claim 6 wherein monitoring the other search space sets one by one based on the information related to the first PDCCH candidate until the maximum preset value is reached further comprises:

acquiring the second PDCCH candidate related information according to the related information of the first PDCCH candidate;

monitoring the second PDCCH candidate;

monitoring other PDCCH candidates of a first search space set comprising the first PDCCH candidate;

and then monitoring one by one according to the sequence of the public search space set and the UE-level search space set until reaching a maximum preset value, wherein the monitoring is carried out one by one according to the sequence from the small index value to the large index value when the monitoring is carried out in the search space set of the same type, and the second PDCCH candidates are not monitored when the second search space set is monitored.
A user device comprising a processor and a communication circuit, the processor being coupled to the communication circuit;

the processor is configured to perform the monitoring method of any of the preceding claims 1-11.
A user equipment storing instructions which when executed implement the monitoring method according to any of claims 1-11.