A transmission enhancement method and a communication device

Abstract

The application provides a transmission enhancement method, comprising: receiving a PDCCH transmission, wherein the PDCCH transmission is configured with a first search space set and an associated first control resource set, and a second search space set and an associated second control resource set; monitoring a first PDCCH candidate and a second PDCCH candidate according to the first search space set and the first control resource set, and the second search space set and the second control resource set; and determining a monitoring order of the second PDCCH candidate and at least one other PDCCH candidate if the at least one other PDCCH candidate overlaps with the second PDCCH candidate, wherein each of the other PDCCH candidates is determined by a corresponding other search space set and an associated other control resource set. The application also provides a corresponding communication device. In this way, the application can avoid monitoring conflicts and achieve PDCCH transmission enhancement.

Description

[Technical Field]

[0001] The disclosed embodiments of this application relate to the field of communication technology, and more specifically, to a transmission enhancement method and a communication device. [Background Technology]

[0002] In New Radio (NR) systems, the PDCCH channel between the Transmission / Reception Point (TRP) and the User Equipment (UE) may be blocked. Therefore, in order to fully leverage the advantages of Multiple-TRP systems, it is necessary to enhance the reliability of the PDCCH. [Summary of the Invention]

[0003] According to embodiments of this application, this application proposes a transmission enhancement method and a communication device to solve the above-mentioned problems.

[0004] According to one aspect of this application, an exemplary transmission enhancement method is disclosed, comprising: receiving a PDCCH transmission, wherein the PDCCH transmission is configured with a first search space set and an associated first control resource set, and a second search space set and an associated second control resource set; monitoring a first PDCCH candidate and a second PDCCH candidate based on the first search space set and the first control resource set, and the second search space set and the second control resource set; if at least one other PDCCH candidate overlaps with the second PDCCH candidate, determining the monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate, wherein each other PDCCH candidate is determined by a corresponding other search space set and an associated other control resource set.

[0005] According to another aspect of this application, an exemplary communication device is disclosed, comprising: a processor, a memory, and a communication circuit, the memory storing instructions that, when executed by the processor, cause the processor to perform the transmission enhancement method as described above via the communication circuit.

[0006] According to another aspect of this application, an exemplary non-volatile computer storage medium is disclosed, characterized in that it stores instructions that, when executed, implement the transmission enhancement method as described above.

[0007] The beneficial effects of this application are as follows: by monitoring the first PDCCH candidate and the second PDCCH candidate according to the first search space set and the first control resource set, as well as the second search space set and the second space resource set, and when at least one other PDCCH candidate overlaps with the second PDCCH candidate, the monitoring order of the second PDCCH candidate and at least one other PDCCH candidate is determined, thereby avoiding monitoring conflicts and achieving PDCCH transmission enhancement. [Attached Image Description]

[0008] The present application will be further described below with reference to the accompanying drawings and embodiments. In the drawings:

[0009] Figure 1 This is a schematic diagram of the multi-TRP system used in the embodiments of this application.

[0010] Figure 2 This is a flowchart of a transmission enhancement method according to an embodiment of this application.

[0011] Figure 3 This is a schematic diagram of the overlapping PDCCH monitoring timing applied in the embodiments of this application.

[0012] Figure 4 This is a schematic diagram of the structure of a communication device according to an embodiment of this application.

[0013] Figure 5 This is a schematic diagram of the structure of a non-volatile computer-readable storage medium according to an embodiment of this application. 【Detailed Implementation Methods】

[0014] To enable those skilled in the art to better understand the technical solution of this application, the relevant technologies of this application will be introduced below.

[0015] The UE needs to know the location of the Physical Downlink Control Channel (PDCCH) in both the frequency and time domains to successfully decode it. In NR systems, the frequency domain resource information and the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols occupied in the time domain of the PDCCH are encapsulated in the Control Resource Set (CORESET). The starting OFDM symbol of the PDCCH, the listening period, and the associated CORESET are encapsulated in the Search Space.

[0016] After the UE determines the candidate time-frequency positions of the PDCCH based on the search space and CORESET configuration, these candidate resources are called PDCCH candidates. The UE performs Polar decoding and Cyclic Redundancy Check (CRC) on each PDCCH candidate. When the CRC passes, it indicates that the current PDCCH candidate has been successfully decoded.

[0017] like Figure 1 As shown, multiple PDCCHs (i.e., PDCCH1 and PDCCH2) are transmitted from multiple TRPs to a single UE. These PDCCHs use different beams for transmission and indicate the same resource allocation information for scheduling a Physical Downlink Shared Channel (PDSCH) / Physical Uplink Shared Channel (PUSCH), etc. Multi-TRP transmission enhances the reliability of the PDCCH.

[0018] Currently, regarding enhanced PDCCH transmission in multi-TRP systems, the repetition scheme is supported, as well as two PDCCH candidate explicit links. The maximum number of PDCCH candidates is 2.

[0019] For a PDCCH transport configuration, there are two Transmission Configuration Indications (TCIs), which support two Search Space Sets (SS sets) that are associated with the corresponding control resource sets respectively.

[0020] After the connection between two PDCCH candidates is established, the following ideas have been reached regarding the limitations of blind detection (BD): the UE does not decode the two individual PDCCH candidates, but only decodes the merged PDCCH candidate; the UE decodes the two individual PDCCH candidates; the UE decodes the first PDCCH candidate and the merged PDCCH candidate; and the UE first decodes the two individual PDCCH candidates, and then decodes the merged PDCCH candidate.

[0021] To enable those skilled in the art to better understand the technical solution of this application, the technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 2 The diagram shown is a flowchart of a transmission enhancement method according to an embodiment of this application. This method can be applied to... Figure 1In a multi-TRP system, the PDCCH transmission enhancement scenario is executed by the UE, and the method includes:

[0023] Step 210: Receive PDCCH transmission.

[0024] The PDCCH transmission is configured with a first search space set and its associated first control resource set, and a second search space set and its associated second control resource set.

[0025] Step 220: Based on the first search space set and the first control resource set, and the second search space set and the second space resource set, monitor the first PDCCH candidate and the second PDCCH candidate.

[0026] Based on the first search space set and the first control resource set, monitor the first PDCCH candidate; based on the second search space set and the second space resource set, monitor the second PDCCH candidate.

[0027] Step 230: If at least one other PDCCH candidate overlaps with the second PDCCH candidate, determine the monitoring order of the second PDCCH candidate and at least one other PDCCH candidate.

[0028] Each other PDCCH candidate is determined by the corresponding set of other search spaces and its associated set of other control resources.

[0029] The overlap between other PDCCH candidates and the second PDCCH candidate refers to the overlap between the other PDCCH candidates and the second PDCCH candidate in the time domain, resulting in an overlap in the monitoring timing of the other PDCCH candidates and the second PDCCH candidate. In this case, the monitoring order is determined according to their corresponding search space set and control resource set to avoid monitoring conflicts.

[0030] Because of the connection between the first and second PDCCH candidates, such as the starting CCE position and the PDCCH candidate index value, the second PDCCH candidate can be monitored based on this connection. It should be noted that the connection between the first and second PDCCH candidates is not specifically limited here.

[0031] In this embodiment, by monitoring the first PDCCH candidate and the second PDCCH candidate according to the first search space set and the first control resource set, as well as the second search space set and the second space resource set, and when at least one other PDCCH candidate overlaps with the second PDCCH candidate, the monitoring order of the second PDCCH candidate and at least one other PDCCH candidate is determined to avoid monitoring conflicts and achieve PDCCH transmission enhancement.

[0032] like Figure 3 As shown, PDCCH candidate 1 and PDCCH candidate 2 are two PDCCH candidates with a connection relationship, namely the first PDCCH candidate and the second PDCCH candidate. The monitoring timing of PDCCH candidate 3 overlaps with that of PDCCH candidate 2, that is, the third PDCCH candidate overlaps with the second PDCCH candidate.

[0033] It should be noted that, in Figure 3 The example only shows the case where one other PDCCH candidate overlaps with the second PDCCH candidate, but there may be multiple other PDCCH candidates overlapping with the second PDCCH candidate. This application is not limited to the number of other PDCCH candidates overlapping with the second PDCCH candidate.

[0034] At this time, Figure 3 In the example, the monitoring order of PDCCH candidate 3 and PDCCH candidate 2 can be determined based on the corresponding search space set of PDCCH candidate 3 and the corresponding control resource set (i.e., the third control resource set and the second control resource set) and the corresponding search space set (i.e., the third search space set and the second search space set) of PDCCH candidate 2.

[0035] Specifically, in some embodiments, step 230 includes:

[0036] Based on the second set of control resources and other sets of control resources, as well as the second set of search space and other sets of search space, the monitoring order of the second PDCCH candidate and at least one other PDCCH candidate is determined.

[0037] The quasi-co-location type of the control resource set includes Quasi-co-location type D (QCL-Type D), meaning that the quasi-co-location type of the TCI configured in the control resource set includes Quasi-co-location type D. In the current protocol, Quasi-co-location type D (QCL-Type D) is a quasi-co-location property used to describe the spatial reception parameters of two ports.

[0038] The search space types include the Common Search Space (CSS) and the UE-specific Search Space (USS). The Common Search Space is mainly used to receive PDCCHs that schedule public messages, while the UE-specific Search Space is used to receive PDCCHs that schedule user data. It can be seen that, from the perspective of PDCCH scheduling content, monitoring PDCCH candidates belonging to the Common Search Space is more important.

[0039] Further, in some embodiments, step 230, determining the monitoring order of the second PDCCH candidate with at least one other PDCCH candidate, includes:

[0040] The monitoring order is determined based on at least one of the quasi-co-location type of the second control resource set and other control resource sets, and the search space type of the second search space set and other search space sets.

[0041] In some examples, the monitoring order is determined based on the quasi-co-location type of the second control resource set and other control resource sets, and the search space type of the second search space set and other search space sets.

[0042] Specifically, if the second control resource set and other control resource sets are configured with the same quasi-co-address type D property, and the second search space set and other search space sets belong to the same search space set, then the monitoring order is to monitor the second PDCCH candidate first and then monitor at least one other PDCCH candidate.

[0043] If the second control resource set and other control resource sets are configured with the same quasi-colocation type D property, and the second search space set and other search space sets belong to different search space sets, then the monitoring order is to monitor the second PDCCH candidate and not monitor at least one other PDCCH candidate, or to monitor one of at least one other PDCCH candidate and not monitor the second PDCCH candidate and the remaining PDCCH candidate among at least one other PDCCH candidate.

[0044] The same quasi-co-address type D property means that the spatial reception parameters describing the two ports are the same. When the second control resource set and other control resource sets are configured with the same quasi-co-address type D property, if the second search space set and other search space sets belong to the same search space set, such as a common search space or a UE-dedicated search space, it indicates that the second PDCCH candidate and other PDCCH candidates are located in the same search space. In this case, the second PDCCH candidate is monitored first through the connection relationship between the first PDCCH candidate and the second PDCCH candidate, and then the other PDCCH candidates are monitored.

[0045] When the second control resource set and other control resource sets are configured with the same quasi-colocation type D property, if the second search space set and other search space sets belong to different search space sets, it indicates that the second PDCCH candidate and other PDCCH candidates are located in different search spaces. In this case, the second PDCCH candidate is monitored and at least one other PDCCH candidate is not monitored, or one of at least one other PDCCH candidate is monitored and the remaining PDCCH candidates among the second PDCCH candidate and at least one other PDCCH candidate are not monitored. For example, in Figure 3 In the example, when the second control resource set and the third control resource set of the third PDCCH candidate are both configured with the same quasi-colocation type D property, the second search space set and the third search space set belong to different search space sets, indicating that the second PDCCH candidate and the third PDCCH candidate are located in different search spaces. In this case, the second PDCCH candidate is monitored and the third PDCCH candidate is not monitored, or the third PDCCH candidate is monitored and the second PDCCH candidate is not monitored.

[0046] Furthermore, in some examples, if the second search space set belongs to the public search space and the other search space sets belong to the user equipment-specific search space, the monitoring order is to monitor the second PDCCH candidate and not monitor at least one other PDCCH candidate.

[0047] For example, in Figure 3 In the example, the second search space set belongs to the public search space, and the third search space set of the third PDCCH candidate belongs to the user equipment-specific search space, indicating that the second PDCCH candidate is located in the public search space and the third PDCCH candidate is located in the user equipment-specific search space. In this case, the monitoring order is to monitor the second PDCCH candidate and not monitor the third PDCCH candidate. Specifically, the second PDCCH candidate is monitored first through the connection relationship between the first PDCCH candidate and the second PDCCH candidate, and then the third PDCCH candidate is monitored.

[0048] If the second search space set belongs to the user equipment-specific search space, and at least one other search space set belongs to the public search space, then the monitoring order is to monitor at least one of the at least one other PDCCH candidate, and not to monitor the second PDCCH candidate and the remaining PDCCH candidates among the at least one other PDCCH candidate.

[0049] For example, if the second search space set belongs to the user equipment-specific search space, and the third search space set of the third PDCCH candidate belongs to the public search space, that is, the third PDCCH candidate is at least one of at least one other PDCCH candidate, then it indicates that the second PDCCH candidate is located in the user equipment-specific search space and the third PDCCH candidate is located in the public search space. In this case, the monitoring order is to monitor the third PDCCH candidate and not monitor the second PDCCH candidate.

[0050] Furthermore, in some examples, when the second search space set belongs to the user device-specific search space and the other search space sets belong to the public search space, the search space set with the smallest index value in the public search space is monitored in the monitoring order.

[0051] For example, at least one other PDCCH candidate overlaps with the second PDCCH candidate. At least one of the other PDCCH candidates belongs to the common search space. For example, the third search space set of the third PDCCH belongs to the common search space, and the index value of its third search space set is the smallest index value in the common search space. In this case, the third PDCCH candidate is monitored, the second PDCCH candidate is not monitored, and the remaining PDCCH candidates among at least one other PDCCH candidate are also not monitored.

[0052] In some examples, the monitoring sequence is determined based on the quasi-co-location type of the second control resource set and other control resource sets.

[0053] Specifically, in some examples, if the second control resource set is configured with a quasi-colocation type D property that is different from other control resource sets, the monitoring order is to monitor the second PDCCH candidate and not monitor at least one other PDCCH candidate. The second PDCCH candidate is monitored through the connection relationship between the first and second PDCCH candidates.

[0054] Specifically, in some other examples, when only one of the second control resource set and the other control resource sets is configured with quasi-co-location type D, the monitoring order is to monitor the PDCCH candidate configured with quasi-co-location type D and not monitor the PDCCH candidate not configured with quasi-co-location type D.

[0055] For example, if only the second control resource set is configured with quasi-co-location type D, and other control resource sets are not configured with quasi-co-location type D, then the monitoring order is to monitor the second PDCCH candidate and not monitor other PDCCH candidates, such as the third PDCCH candidate. As another example, if only the third control resource set of the third PDCCH candidate is configured with quasi-co-location type D, and the second control resource set is not configured with quasi-co-location type D, then the monitoring order is to monitor the third PDCCH candidate and not monitor the second PDCCH candidate or other PDCCH candidates not configured with quasi-co-location type D. Monitoring the second PDCCH candidate is achieved through the connection relationship between the first and second PDCCH candidates.

[0056] Specifically, in some other examples, when neither the second control resource set nor the other control resource sets are configured with quasi-co-address type D, the monitoring order is to monitor the second PDCCH candidate first and then monitor the other PDCCH candidates.

[0057] If neither the second control resource set nor the other control resource sets are configured with quasi-co-location type D, then regardless of whether the other search space sets corresponding to the other PDCCH candidates that overlap with the second PDCCH candidate belong to the public search space or the UE-dedicated search space, that is, regardless of whether the other PDCCH candidates are located in the public search space or the UE-dedicated search space, the second PDCCH candidate is first monitored through the connection relationship between the first PDCCH candidate and the second PDCCH candidate, and then the other PDCCH candidates that overlap with the second PDCCH candidate are monitored.

[0058] As mentioned above, in Figure 3 In the example, PDCCH candidate 1 and PDCCH candidate 2 are two PDCCH candidates with a connection relationship, namely the first PDCCH candidate and the second PDCCH candidate, while the monitoring timing of PDCCH candidate 3 overlaps with that of PDCCH candidate 2, that is, the third PDCCH candidate overlaps with the second PDCCH candidate.

[0059] At this time, Figure 3 In the example, it can be directly determined that the second PDCCH candidate will be monitored first, followed by the third PDCCH candidate. Specifically, the second PDCCH candidate is monitored based on the connection relationship between the first and second PDCCH candidates, and then the third PDCCH candidate is monitored.

[0060] Specifically, in some embodiments, step 230 includes: directly determining the monitoring order of the second PDCCH candidate and at least one other PDCCH candidate as monitoring the second PDCCH candidate first and then monitoring at least one other PDCCH candidate.

[0061] In other words, without considering the quasi-co-address type and search space type of the TCI configured in the control resource set, among multiple overlapping PDCCH candidates, the second PDCCH candidate is prioritized for monitoring based directly on the connection relationship between the first and second PDCCH candidates, such as the starting CCE position and the PDCCH candidate index value, before monitoring other overlapping PDCCH candidates. This ensures that the second PDCCH candidate is monitored first, thereby guaranteeing its decoding performance.

[0062] like Figure 4 The diagram shown is a structural schematic of a communication device according to an embodiment of this application. The communication device 400 includes a memory 410, a processor 420, and a communication circuit 430. The memory 410 and the communication circuit 430 are respectively connected to the processor 420.

[0063] Memory 410 may include read-only memory and / or random access memory, etc., and provides instructions and data to processor 420. A portion of memory 410 may also include non-volatile random access memory (NVRAM). Memory 410 stores instructions.

[0064] The communication circuit 430 is used to send and receive data and is the interface for communication device 400 to communicate with other communication devices.

[0065] Processor 420 controls the operation of the communication device; processor 420 can also be referred to as a CPU (Central Processing Unit). Processor 420 may be an integrated circuit chip with signal processing capabilities. Processor 420 can also be a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. A general-purpose processor can be a microprocessor or any conventional processor.

[0066] The processor 420 is used to execute instructions to implement the methods provided in any one and any non-conflicting combination of the transmission enhancement method embodiments of this application.

[0067] The communication device in this embodiment can be a user equipment or an independent component that can be integrated into the user equipment, such as a baseband board.

[0068] like Figure 5 The diagram shown is a structural schematic of a non-volatile computer-readable storage medium according to an embodiment of this application. The non-volatile computer-readable storage medium 500 internally stores instructions 501. When the instructions 501 are executed, they implement the methods provided by any one and any non-conflicting combination of the transmission enhancement methods described in the above embodiments of this application.

[0069] The non-volatile computer-readable storage medium 500 can be a portable storage medium such as a USB flash drive or optical disc, or it can be a user device or a standalone component that can be integrated into a user device, such as a baseband board.

[0070] The above are merely embodiments of this application and do not limit the scope of this patent application. Any equivalent structural or procedural changes made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of this application.

Claims

1. A transmission enhancement method, characterized in that, include: Receive PDCCH transmission, wherein the PDCCH transmission is configured with a first search space set and its associated first control resource set, and a second search space set and its associated second control resource set; Based on the first search space set and the first control resource set, and the second search space set and the second control resource set, monitor the first PDCCH candidate and the second PDCCH candidate; If at least one other PDCCH candidate overlaps with the second PDCCH candidate, the monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate is determined, wherein each other PDCCH candidate is determined by the corresponding other search space set and its associated other control resource set; when the second control resource set and the third control resource set of the third PDCCH candidate are both configured with the same quasi-colocation type D property, if the second search space set belongs to the public search space and the third search space set of the third PDCCH candidate belongs to the user equipment dedicated search space, the monitoring order is: first, through the connection relationship between the first PDCCH candidate and the second PDCCH candidate, the second PDCCH candidate is monitored, and then the third PDCCH candidate is monitored.

2. The method as described in claim 1, characterized in that, Determining the monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate includes: The monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate is determined based on the second control resource set and the other control resource sets, as well as the second search space set and the other search space sets.

3. The method as described in claim 2, characterized in that, Determining the monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate includes: The monitoring order is determined based on at least one of the quasi-co-location type of the second control resource set and the other control resource sets, and the search space type of the second search space set and the other search space sets.

4. The method as described in claim 1, characterized in that, When the second search space set belongs to the user equipment-specific search space, and at least one of the other search space sets belongs to the public search space, the search space set with the smallest index value in the public search space is monitored in the monitoring order.

5. The method as described in claim 3, characterized in that, If the second control resource set and the other control resource sets are all configured with different quasi-colocation type D properties, then the monitoring order is to monitor the second PDCCH candidate and not monitor the at least one other PDCCH candidate.

6. The method as described in claim 3, characterized in that, When only one of the second control resource set and the other control resource sets is configured with quasi-co-location type D, the monitoring order is to monitor the PDCCH candidate configured with quasi-co-location type D and not monitor the PDCCH candidate not configured with quasi-co-location type D.

7. The method as described in claim 3, characterized in that, When neither the second control resource set nor the other control resource sets are configured with quasi-co-address type D, the monitoring order is to monitor the second PDCCH candidate first and then monitor the other PDCCH candidates.

8. The method as described in claim 1, characterized in that, Determining the monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate includes: The monitoring order of the second PDCCH candidate and the at least one other PDCCH candidate is directly determined to be: monitor the second PDCCH candidate first, and then monitor the at least one other PDCCH candidate.

9. A communication device, characterized in that, include: A processor, a memory, and a communication circuit, the memory storing instructions that, when executed by the processor, cause the processor to perform the method as described in any one of claims 1-8 via the communication circuit.

10. A non-volatile computer storage medium, characterized in that, The system stores instructions that, when executed, perform the method as described in any one of claims 1-8.

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