Rate matching, method and apparatus for selecting transmission mode

Abstract

The present disclosure provides a rate matching, transmission mode selection method and device, wherein the method comprises: determining a wideband demodulation reference signal (DMRS) of a control channel resource; and rate matching the wideband DMRS. Through the present disclosure, the technical problem that the wideband DMRS cannot be rate matched in the related art is solved.

Description

Technical Field

[0001] This disclosure relates to the field of communications, and more specifically, to a method and apparatus for rate matching and transmission mode selection. Background Technology

[0002] In related technologies, to address the rate matching problem, base stations configure semi-static rate matching resource sets and / or dynamic rate matching resource sets for terminals, including carrier-level and BWP (bandwidth part) level configurations. For semi-static rate matching resource sets, once configured, the service channel always needs to perform rate matching on these sets; that is, the resources of these sets cannot be used to transmit the service channel. For dynamic rate matching resource sets, whether the service channel performs rate matching on these sets depends on the rate matching indication information in the dynamically transmitted DCI (Downlink Control Information).

[0003] In related technologies, in addition to considering rate matching for time-frequency resources within the rate matching resource set, service channels also need to perform rate matching for SSB (a synchronization signal block composed of a primary synchronization signal and a secondary synchronization channel) resources and scheduling PDCCH (physical downlink control channel) DCI resources of the service channels.

[0004] For demodulation pilots of CORESET (Control Resource Set), there are two configurations: if the base station configures CORESET-precoder-granularity to be equal to CORESET-REG-bundle-size, it means that Wideband DMRS (Wideband Demodulation Reference Signal) is not configured; if the base station configures CORESET-precoder-granularity to be equal to the size of CORESET in the frequency domain, it means that Wideband DMRS is configured.

[0005] For CORESET resources configured with Wideband DMRS, when performing rate matching for service channels, there is no solution in the relevant technologies for rate matching of Wideband DMRS REs other than the rate matching of the resources mentioned above.

[0006] A base station can configure multiple semi-static transmissions for a terminal. However, there is currently no suitable solution for how to handle conflicts that arise when multiple semi-static transmissions occupy resources.

[0007] There are currently no effective solutions to the aforementioned problems in the relevant technologies. Summary of the Invention

[0008] This disclosure provides a method and apparatus for rate matching and transmission mode selection.

[0009] According to one embodiment of this disclosure, a rate matching method is provided, comprising: determining control channel resources of a broadband demodulation reference signal (DMRS) configured in a terminal; and performing rate matching on the broadband DMRS.

[0010] According to one embodiment of this disclosure, a method for selecting a transmission mode is provided, comprising: configuring a plurality of semi-static configuration transmissions for a terminal; and selecting one of the plurality of semi-static configuration transmissions for transmission on radio resources.

[0011] According to another embodiment of this disclosure, a rate matching apparatus is provided, comprising: a determining module for determining control channel resources of a broadband demodulation reference signal (DMRS) configured in a terminal; and a processing module for performing rate matching on the broadband DMRS.

[0012] According to another embodiment of this disclosure, a transmission mode selection device is provided, comprising: a configuration module for configuring a plurality of semi-static configuration transmissions for a terminal; and a selection module for selecting one of the plurality of semi-static configuration transmissions for transmission on radio resources.

[0013] According to yet another embodiment of this disclosure, a storage medium is also provided, wherein a computer program is stored therein, wherein the computer program is configured to execute the steps in any of the above method embodiments when it is run.

[0014] According to yet another embodiment of this disclosure, an electronic device is also provided, including a memory and a processor, wherein the memory stores a computer program and the processor is configured to run the computer program to perform the steps in any of the above method embodiments.

[0015] This disclosure solves the technical problem in related technologies that rate matching of broadband DMRS cannot be performed when determining the control channel resources of the broadband DMRS configured in the terminal. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this disclosure, illustrate exemplary embodiments of the present disclosure and are used to explain the disclosure, but do not constitute an undue limitation of the disclosure. In the drawings:

[0017] Figure 1 This is a network architecture diagram of an embodiment of this disclosure;

[0018] Figure 2 This is a flowchart of a rate matching method according to an embodiment of the present disclosure;

[0019] Figure 3 This is a flowchart of a method for selecting a transmission mode according to an embodiment of the present disclosure;

[0020] Figure 4 This is a structural block diagram of a rate matching device according to an embodiment of the present disclosure;

[0021] Figure 5 This is a structural block diagram of the selection of a transmission method according to an embodiment of the present disclosure;

[0022] Figure 6 This is a schematic diagram illustrating that a CORESET comprises multiple clusters according to an embodiment of this disclosure;

[0023] Figure 7 This is a schematic diagram illustrating rate matching in an embodiment of this disclosure;

[0024] Figure 8 This is a schematic diagram of obtaining resource D through rate matching in an embodiment of this disclosure. Figure 1 ;

[0025] Figure 9 This is a schematic diagram of obtaining resource D through rate matching in an embodiment of this disclosure. Figure 2 ;

[0026] Figure 10 This is a schematic diagram showing the four clusters obtained by blind testing of CORESET according to an embodiment of this disclosure;

[0027] Figure 11 This is a schematic diagram of rate matching on resource PDSCH according to an embodiment of this disclosure;

[0028] Figure 12 This is a schematic diagram showing that no Search Space Set is mapped on Cluster3 of CORESET in this embodiment of the present disclosure;

[0029] Figure 13 This is a schematic diagram of a base station configuring multiple semi-static configurations for a terminal according to an embodiment of this disclosure. Detailed Implementation

[0030] The present disclosure will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0032] Example 1

[0033] The embodiments disclosed herein can be operated on Figure 1 On the network architecture shown, Figure 1 This is a network architecture diagram of an embodiment of this disclosure, such as... Figure 1 As shown, the network architecture includes: base stations and terminals, wherein the base stations and terminals are connected.

[0034] This embodiment provides a rate matching method operating on the above-described network architecture. Figure 2 This is a flowchart of a rate matching method according to an embodiment of the present disclosure, such as... Figure 2 As shown, the process includes the following steps:

[0035] Step S202: Determine the wideband demodulation reference signal DMRS for the control channel resources;

[0036] Step S204: Perform rate matching on the broadband DMRS.

[0037] By following the steps above, when determining the control channel resources of the broadband DMRS configured for the terminal, rate matching of the broadband DMRS is performed, thus solving the technical problem that rate matching of broadband DMRS cannot be performed in related technologies.

[0038] Optionally, the entity performing the above steps can be a terminal, such as a mobile phone, but is not limited to this.

[0039] Optionally, rate matching for the broadband DMRS is performed based on at least one of the following: frequency domain resources of the search space set; frequency domain resources of the search space; semi-static rate matching resources; dynamic rate matching resources; rate matching indication signaling; and allocation of service channel resources.

[0040] Optionally, rate matching for broadband DMRS includes: subtracting broadband DMRS resource elements (REs) from the service channel resources on a first resource where the search space to be blind-detected intersects with the service channel resources.

[0041] Optionally, rate matching for broadband DMRS includes: rate matching of the service channel to the RE of the broadband DMRS of the control channel.

[0042] In this embodiment, the control channel may be, but is not limited to, a Physical Downlink Control Channel (PDCCH) and a Physical Uplink Control Channel (PUCCH). The service channel may be, but is not limited to, a Physical Downlink Shared Channel (PDSCH) and a Physical Uplink Shared Channel (PUSCH).

[0043] Optionally, rate matching is performed on the broadband DMRS, and rate matching of the traffic channel to the RE of the broadband DMRS of the control channel includes the following examples:

[0044] When the control channel resources contain multiple non-contiguous Physical Resource Block (PRB) clusters in the frequency domain, the service channel performs rate matching on the REs of the broadband DMRS of one or more of the multiple non-contiguous PRB clusters.

[0045] When the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain, for one or more PRB clusters that are mapped with a search space or a set of search spaces, the service channel performs rate matching on the RE of the broadband DMRS of one or more PRB clusters.

[0046] When the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain, for one or more PRB clusters that overlap with the service channel resources, the service channel determines whether to perform rate matching on all or part of the REs of the broadband DMRS for one or more PRB clusters according to the rate matching indication signaling.

[0047] Optionally, the REs of all or part of the broadband DMRS are broadband DMRS REs within the rate matching resource set indicated by the rate matching indication signaling.

[0048] This embodiment provides a method for selecting a transmission mode operating under the above-described network architecture. Figure 3 This is a flowchart of a transmission mode selection method according to an embodiment of the present disclosure, such as... Figure 3 As shown, the process includes the following steps:

[0049] Step S302: Configure multiple semi-static configuration transmissions;

[0050] Step S304: Select one of the multiple semi-static configuration transmissions on the radio resources for transmission.

[0051] Optionally, selecting one of a plurality of semi-static configuration transmissions for transmission on radio resources includes at least one of the following:

[0052] Based on the priority information of multiple semi-static configuration transmissions, one of the multiple semi-static configuration transmissions is selected for transmission on the radio resources; optionally, the priority information of the multiple semi-static configuration transmissions is predefined by the system or semi-statically configured by the base station.

[0053] Based on the period of multiple semi-static configuration transmissions, one of the multiple semi-static configuration transmissions is selected on the radio resources for transmission.

[0054] Optionally, selecting one of the multiple semi-static configuration transmissions on the radio resource for transmission based on the period of the multiple semi-static configuration transmissions includes: selecting the semi-static configuration transmission with the longest period as the designated transmission from the multiple semi-static configuration transmissions; and selecting the designated transmission on the radio resource for transmission, wherein the transmission direction on the radio resource is determined by the designated transmission.

[0055] Optionally, multiple semi-static configuration transmissions include at least one of the following: Semi-Persistent Scheduling (SPS) Physical Downlink Shared Channel (PDSCH) transmission, SPS Physical Uplink Shared Channel (PUSCH) transmission, Physical Downlink Control Channel (PDCCH) transmission, Physical Uplink Control Channel (PUCCH) transmission, Grant-free PUSCH transmission, Grant-free PDSCH transmission, Sound Reference Signal (SRS) transmission, and Channel State Information Reference Signal (CSI-RS) transmission.

[0056] Optionally, selecting one of the multiple semi-static configuration transmissions for transmission on radio resources includes: when the radio resources occupied by the multiple semi-static configuration transmissions overlap, selecting one of the multiple semi-static configuration transmissions for transmission on the radio resources. The overlapping radio resources occupied by the multiple semi-static configuration transmissions include at least one of the following: frequency domain resource overlap, and time domain resource overlap.

[0057] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0058] Example 2

[0059] This embodiment also provides a rate matching and transmission mode selection device, which is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0060] Figure 4 This is a structural block diagram of a rate matching device according to an embodiment of the present disclosure, such as... Figure 4 As shown, the device includes:

[0061] The determination module 40 is used to determine the wideband demodulation reference signal DMRS for control channel resources;

[0062] Processing module 42 is used for rate matching of broadband DMRS.

[0063] Optionally, the processing module includes at least one of the following: a first processing unit, configured to perform rate matching on the REs of the broadband DMRS of one or more PRB clusters among the multiple non-contiguous PRB clusters when the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain; a second processing unit, configured to perform rate matching on the REs of the broadband DMRS of one or more PRB clusters among the multiple non-contiguous PRB clusters for which a search space or a set of search spaces is mapped, when the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain; and a third processing unit, configured to determine, according to rate matching indication signaling, whether to perform rate matching on all or part of the REs of the broadband DMRS of one or more PRB clusters among the multiple non-contiguous PRB clusters when the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain.

[0064] Figure 5This is a structural block diagram of the selection of transmission method according to an embodiment of the present disclosure, such as... Figure 5 As shown, the device includes:

[0065] Configuration module 50 is used to configure multiple semi-static configuration transmissions;

[0066] Selection module 52 is used to select one of a plurality of semi-static configuration transmissions for transmission on radio resources.

[0067] Optionally, the selection module includes at least one of the following: a first selection unit, configured to select one of the multiple semi-static configuration transmissions for transmission on the radio resource based on the priority information of the multiple semi-static configuration transmissions; and a second selection unit, configured to select one of the multiple semi-static configuration transmissions for transmission on the radio resource based on the period of the multiple semi-static configuration transmissions.

[0068] It should be noted that the above modules can be implemented by software or hardware. For the latter, they can be implemented in the following ways, but are not limited to: all the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0069] Example 3

[0070] This embodiment addresses CORESET (Control Resource Set) resources configured with Wideband DMRS. When performing rate matching for service channels, in addition to rate matching for the resources mentioned above, rate matching for the Wideband DMRS RE must also be considered. This embodiment provides a method for determining rate matching resources. The method includes: for a second channel resource configured with a wideband demodulation reference signal, determining the rate matching resource based on at least one of the following factors: frequency domain resource mapping of the search space set; frequency domain resource mapping of the search space; semi-static rate matching resources; dynamic rate matching resources; rate matching indication signaling; and service channel resource allocation.

[0071] The following implementation method will be used for illustration:

[0072] Implementation method 1:

[0073] The configuration information sent by the base station to the terminal indicates that WideBand DMRS will be configured on a certain CORESET, specifically the parameter CORESET-precoder-granularity. After receiving this configuration information, the terminal will perform blind detection of the CORESET based on WideBand DMRS. Assume that the CORESET contains 4 clusters in the frequency domain, each cluster contains multiple consecutive PRBs, and any two clusters are not contiguous in the frequency domain. Figure 6 As shown, Figure 6 This is a schematic diagram of a CORESET containing multiple clusters according to an embodiment of this disclosure. The base station configures a Search Space Set for the terminal, which is linked to the CORESET. All candidates contained in the Search Space Set are mapped to Cluster 0 and Cluster 1.

[0074] When blindly detecting the Search Space Set, the terminal only performs blind detection on Cluster 0 and Cluster 1, not on Cluster 2 and Cluster 3. Therefore, the terminal assumes that Wideband DMRS is distributed on Cluster 0 and Cluster 1. Thus, when the terminal demodulates PDSCH, if PDSCH resources overlap with the CORESET, the terminal needs to consider the rate matching of PDSCH to the CORESET. Figure 7 As shown, Figure 7 This is a schematic diagram of rate matching in an embodiment of this disclosure. When the terminal considers the PDSCH to perform rate matching on the CORESET, since all candidates associated with the Search Space Set on the CORESET are only mapped on Cluster 0 and Cluster 1, and no candidate is mapped on Cluster 2 and Cluster 3, the terminal performs rate matching on the Wideband DMRS on resource A, which has intersection with the PDSCH resources in {Cluster 0 and Cluster 1}. That is, the Wideband DMRS RE on resource A is deducted from the PDSCH resources, and it is assumed that the PDSCH will not be mapped to these REs.

[0075] For resources B and C that intersect with PDSCH resources in {Cluster2Cluster3}, whether the terminal's PDSCH needs to perform rate matching for resources B and C is not affected by the Wideband DMRS assumption of CORESET, but depends entirely on the configuration of the rate matching resource set and the dynamic rate matching indication, specifically including the following situations:

[0076] Case 1: If resources B and C do not belong to the set of resources that match arbitrary rates, such as... Figure 7 As shown, the terminal does not need to perform rate matching for resources B and C, and naturally does not assume that Wideband DMRS REs on resources B and C cannot be used for PDSCH transmission. The terminal's rate matching for the PDSCH does not need to consider resources B and C; that is, resources B and C can be used for PDSCH transmission.

[0077] Scenario 2: If resources B and C, a portion of which are located in one or more semi-static rate-matched resource sets, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of obtaining resource D through rate matching in an embodiment of this disclosure. Figure 1 The base station configures a semi-static rate-matching resource set 0 for the terminal. Resource set 0 intersects with resources B and C. A subset of resource B, resource D, does not intersect with resource set 0. Resource D is defined as follows: a portion of resources in resource B is the intersection of resource B and resource set 0; the remaining resources after removing this intersection are resource D. After configuring resource set 0, the terminal always performs rate matching on resource set 0 when receiving PDSCH. Therefore, resources in resource B other than subset D, and resource C, need to be rate-matched by PDSCH. That is, the terminal believes that PDSCH will not be mapped to resources in resource B other than subset D, and to resource C. For subset D of resource B, because it has no intersection with resource set 0, PDSCH will not perform rate matching on resource D. Both the base station and the terminal believe that PDSCH will be mapped to resource D. The terminal does not assume that Wideband DMRS exists on resource D.

[0078] Scenario 3: If resources B and C, one of them is in one or more sets of dynamically rate-matched resources, such as... Figure 9 As shown, Figure 9 This is a schematic diagram of obtaining resource D through rate matching in an embodiment of this disclosure. Figure 2The base station configures a dynamic rate matching resource set 1 for the terminal. Resource set 1 intersects with resources B and C. A subset of resource B, resource D, does not intersect with resource set 1. Resource D is defined as follows: a portion of resources in resource B is the intersection of resource B and resource set 1; the remaining resources after removing this intersection from resource B are resource D. After configuring the dynamic rate matching resource set 1 for the terminal, the terminal determines whether rate matching of resource set 1 is necessary based on the dynamic rate matching indication for the group to which resource set 1 belongs in the received DCI (Dynamic Rate Matching Instructions). For example, if resource set 1 belongs to group 0.

[0079] If the dynamic rate matching bit in the DCI corresponding to group 0 indicates that rate matching for group 0 is required, then within the slot where this dynamic rate matching bit is active, the PDSCH will not be mapped within the Resource set 1 range. When the terminal receives the PDSCH, it will perform rate matching on Resource set 1. Therefore, resources in resource B, except for subset resource D, and resource C, all need to be rate-matched by the PDSCH. In other words, the terminal believes that PDSCH will not be mapped on resources in resource B, except for subset resource D, and on resource C. For subset resource D of resource B, since it has no intersection with Resource set 1, the PDSCH will not perform rate matching on resource D. That is, both the base station and the terminal believe that PDSCH will be mapped on resource D. The terminal will not assume that Wideband DMRS exists on resource D.

[0080] If the dynamic rate matching bit in the DCI indicates that rate matching for group 0 is not required, then within the s lot where this dynamic rate matching bit is active, the PDSCH will be mapped onto the resource range where Resource set 1 and the PDSCH resource overlap. The terminal assumes that resources in resource B, except for subset resource D, and resource C will all be mapped to PDSCH without rate matching. For resource D, since it has no intersection with Resource set 1, the base station can map PDSCH on resource D. Therefore, PDSCH can also be mapped on resources B and C. That is, both the base station and the terminal assume that PDSCH will be mapped on resources B and C, and the terminal does not assume that Wideband DMRS exists on resources B and C.

[0081] Implementation method 1:

[0082] The configuration information sent by the base station to the terminal indicates that WideBand DMRS will be configured on a certain CORESET, specifically the parameter CORESET-precoder-granularity. After receiving this configuration information, the terminal will perform blind detection of the CORESET based on WideBand DMRS. Assume that the CORESET contains four clusters in the frequency domain, each cluster contains multiple consecutive PRBs, and any two clusters are not contiguous in the frequency domain. Figure 6 As shown. The base station configures a Search SpaceSet for the terminal, which is linked to the CORESET. All candidates contained in the Search SpaceSet are mapped to Cluster 0 and Cluster 1.

[0083] The dynamic rate matching resources configured by the base station for the terminal include the CORESET, that is, the CORESET is the dynamic rate matching resources or a subset thereof configured by the base station for the terminal.

[0084] Includes the following situations:

[0085] Scenario 1: The base station sends a dynamic rate matching signaling message to the terminal, indicating that rate matching needs to be performed on the dynamic rate matching resources containing the CORESET. If the PDSCH resources overlap with the CORESET, then within the slot where the dynamic rate matching signaling is effective, the range of resources where the PDSCH resources overlap with the CORESET is specified. Figure 7 On resources {Resource A, Resource B, Resource C}, the base station will not send PDSCH on these resources, and the terminal needs to perform rate matching on the PDSCH on these resources.

[0086] Scenario 2: The base station sends a dynamic rate matching signaling message to the terminal, indicating that rate matching is not required for the dynamic rate matching resources containing the CORESET. If the PDSCH resources overlap with the CORESET, then within the slot where the dynamic rate matching signaling is effective, the resource range where the PDSCH resources overlap with the CORESET is specified. Figure 7 In the context of {Resource A, Resource B, Resource C}, the processing of Resource A differs from that of {Resource B, Resource C}, specifically as follows:

[0087] For resource A, since it is a subset of {Cluster 0 & Cluster 1}, when blindly detecting the Search SpaceSet, the terminal will only perform blind detection on Cluster 0 and Cluster 1, and will not perform blind detection on Cluster 2 and Cluster 3. The terminal will assume that Wideband DMRS are distributed on Cluster 0 and Cluster 1. Therefore, the base station will perform rate matching on the Wideband DMRS RE. Thus, for the Wideband DMRS RE on resource A, the base station will not send PDSCH, and the terminal needs to perform rate matching on the Wideband DMRS RE on resource A.

[0088] For {Resource B Resource C}, since it has no intersection with {Cluster 0 Cluster 1}, the terminal will not blindly check the Search Space Set on {Resource B Resource C}. Therefore, according to the dynamic rate matching signaling indication sent by the base station to the terminal, the terminal believes that the base station will send PDSCH on {Resource B Resource C}, and the terminal does not need to perform rate matching on {Resource B Resource C}.

[0089] Therefore, to summarize scenarios 1 and 2, regardless of whether the base station dynamically instructs the terminal to perform rate matching on the CORESET, when the terminal needs to blindly detect the slot of the Search Space Set, the terminal always assumes that the base station will perform rate matching on the Wideband DMRS REs on resource A, meaning that PDSCH will not be transmitted on these RE resources. However, on {resource B and resource C}, according to the dynamic rate matching signaling indication, the terminal either assumes that the base station will perform rate matching on the entire {resource B and resource C}, or it assumes that the base station will not perform rate matching on the entire {resource B and resource C}.

[0090] Implementation Method 2:

[0091] The configuration information sent by the base station to the terminal indicates that WideBand DMRS will be configured on a certain CORESET, specifically the parameter CORESET-precoder-granularity. After receiving this configuration information, the terminal will blindly detect the CORESET based on WideBand DMRS. Assume that the CORESET contains 4 clusters in the frequency domain, each cluster contains multiple consecutive PRBs, and no two clusters are discontinuous in the frequency domain. The time domain length of the CORESET is 2 OFDM (Orthogonal Frequency Division Multiplexing) symbols. The base station configures two Search Space Sets for the terminal, namely Search Space Set 0 and Search Space Set 1, both of which are linked to the CORESET. The time domain start symbol of Search Space Set 0 is Symbol#0, and the time domain start symbol of Search Space Set 1 is Symbol#1, as detailed below. Figure 10 As shown, Figure 10 This is a schematic diagram of a blind test of CORESET yielding four clusters according to an embodiment of this disclosure.

[0092] When considering rate matching for PDSCH, the following cases are included:

[0093] Scenario 1: If resources A, B, and C do not belong to any rate-matching resource set, such as... Figure 11 As shown, Figure 11 This is a schematic diagram of rate matching on resource PDSCH in an embodiment of this disclosure. No Search Space Set is mapped on Cluster3 of the CORESET. Therefore, both the base station and the terminal believe that the Cluster3 resource can be used for PDSCH transmission. Resource A, which overlaps with Cluster3, can be used for PDSCH transmission. That is, PDSCH does not need to perform rate matching on resource A.

[0094] Cluster 0 and PDSCH resources do not overlap, so PDSCH rate matching does not need to consider Cluster 0.

[0095] Since both Cluster 1 and Cluster 2 overlap with PDSCH resources, the terminal believes that Wideband DMRS exists on the frequency domain resources Cluster 1 and Cluster 2. Furthermore, Wideband DMRS exists on the time domain resources {Symbol#0Symbol#1} of Search Space Set 0 and {Symbol#1Symbol#2} of Search Space Set 1, which are obtained by taking an OR operation. In other words, the terminal believes that Wideband DMRS exists on both resources B and C. PDSCH cannot be mapped on Wideband DMRS REs, and PDSCH needs to perform rate matching on the Wideband DMRS REs on resources B and C.

[0096] Implementation Method 3:

[0097] The configuration information sent by the base station to the terminal indicates that WideBand DMRS will be configured on a certain CORESET, specifically the parameter CORESET-precoder-granularity. After receiving this configuration information, the terminal will blindly detect the CORESET based on WideBand DMRS. Assume that the CORESET contains 4 clusters in the frequency domain, each cluster contains multiple consecutive PRBs, and any two clusters are not contiguous in the frequency domain. The time domain length of the CORESET is 2 OFDM symbols. The base station configures two Search Space Sets for the terminal, namely Search Space Set 0 and Search Space Set 1, both of which are linked to the CORESET. The time domain start symbol of Search Space Set 0 is Symbol#0, and the time domain start symbol of Search Space Set 1 is Symbol#1, as detailed below. Figure 10 As shown.

[0098] When considering rate matching for PDSCH, the following cases are included:

[0099] Scenario 1: If resources A, B, and C do not belong to any rate-matching resource set, such as... Figure 12 As shown, Figure 12This is a schematic diagram of a CORESET Cluster3 in this embodiment of the present disclosure, where no Search Space Set is mapped. Since no Search Space Set is mapped on the CORESET Cluster3, both the base station and the terminal believe that the Cluster3 resources can be used for PDSCH transmission. Resource A, which overlaps with the PDSCH resources in Cluster3, can be used for PDSCH transmission, meaning that PDSCH does not need to perform rate matching on resource A.

[0100] Cluster 0 and PDSCH resources do not overlap, so PDSCH rate matching does not need to consider Cluster 0.

[0101] If both Cluster 1 and Cluster 2 overlap with PDSCH resources, the terminal will assume that Wideband DMRS exists on the frequency domain resources Cluster 1 and Cluster 2. However, Wideband DMRS only exists at the intersection of the frequency domain Cluster and the time domain OFDM symbol where the corresponding Search Space Set is located.

[0102] Search Space Set 0 corresponds to the time domain resource {Symbol#0Symbol#1}. Search Space Set 0 is mapped to Cluster 1. Therefore, the terminal believes that Wideband DMRS exists on the intersection resource B of the time domain resource {Symbol#0Symbol#1}, the frequency domain resource Cluster 1, and the PDSCH resource. The terminal needs to perform rate matching on the Wideband DMRS REs on resource B. These REs cannot be used for PDSCH mapping.

[0103] Search Space Set 1 corresponds to the time domain resource {Symbol#1Symbol#2}. Search Space Set 1 is mapped to Cluster 2. Therefore, the terminal believes that Wideband DMRS exists on the intersection resource C of the time domain resource {Symbol#1Symbol#2}, the frequency domain resource Cluster 2, and the PDSCH resource. The terminal needs to perform rate matching on the Wideband DMRS REs on resource C. These REs cannot be used for PDSCH mapping.

[0104] This embodiment also provides a method for determining a first configuration transmission, the method comprising: when a base station configures multiple first configuration transmissions, selecting one of the first configurations on a first resource for transmission. The following embodiments will be used for illustration:

[0105] Implementation Method 4:

[0106] The base station can configure semi-static transmission for the terminal, which may include at least one of the following:

[0107] SPS (Semi-Persistent Scheduling) PDSCH transmission;

[0108] SPS (Semi-Persistent Scheduling) PUSCH transport;

[0109] PDCCH transmission;

[0110] PUCCH transmission;

[0111] Grant-free PUSCH transfer;

[0112] Grant-free PDSCH transmission;

[0113] SRS transmission;

[0114] CSI-RS transmission.

[0115] When a base station configures multiple semi-static transmission methods for a terminal, it will allocate separate time and frequency domain resources for each transmission method. For example, when a base station configures multiple semi-static transmission methods for a terminal... Figure 13 As shown, Figure 13 This is a schematic diagram illustrating how a base station configures multiple semi-static configurations for a terminal according to an embodiment of this disclosure. The base station configures semi-static configuration 1 and semi-static configuration 2 for the terminal. The periods of semi-static configuration 1 and semi-static configuration 2 are different. The period of semi-static configuration 1 is 4 slots, and the period of semi-static configuration 2 is 3 slots. Furthermore, semi-static configuration 1 and semi-static configuration 2 may have their own time-domain offset configurations.

[0116] Based on the time-domain configurations of semi-static configuration 1 and semi-static configuration 2, both semi-static configuration 1 and semi-static configuration 2 need to be transmitted on a certain OFDM symbol in slot 8. Because the time and / or frequency domain resources occupied by semi-static configuration 1 and semi-static configuration 2 in slot 8 overlap, it cannot be guaranteed that both semi-static configuration 1 and semi-static configuration 2 will be transmitted in slot 8. Therefore, only the semi-static configuration with the longer period (i.e., only the transmission of semi-static configuration 2) is retained in slot 8, while the transmission of the semi-static configuration with the shorter period (i.e., the transmission of semi-static configuration 1) is abandoned. Therefore, the actual transmitted semi-static configuration is as follows: Figure 13 As shown in the third row.

[0117] The semi-static configuration 1 and semi-static configuration 2 described here both conform to the semi-static frame structure configuration and / or the SFI indication in the GC-PDCCH in terms of transmission direction. Specifically, this includes the following two cases:

[0118] Case 1: The transmission direction of semi-static configuration 1 is the same as that of semi-static configuration 2. For example, the transmission direction of both semi-static configuration 1 and semi-static configuration 2 is downlink transmission (which can be SPS (Semi-Persistent Scheduling) physical downlink shared channel PDSCH transmission, physical downlink control channel PDCCH transmission, grant-free PDSCH transmission, or channel state information reference signal CSI-RS transmission). The semi-static frame structure is configured on a certain OFDM symbol in slot 8 as either downlink transmission or flexible transmission direction.

[0119] Scenario 2: The transmission direction of semi-static configuration 1 is different from that of semi-static configuration 2. For example, semi-static configuration 1 is downlink transmission (which could be SPS (Semi-Persistent Scheduling) physical downlink shared channel PDSCH transmission, physical downlink control channel PDCCH transmission, grant-free PDSCH transmission, or channel state information reference signal CSI-RS transmission). Semi-static configuration 2 is uplink transmission (which could be SPS (Semi-Persistent Scheduling) physical uplink shared channel PDSCH transmission, physical uplink control channel PUCCH transmission, grant-free PUSCH transmission, or sounding reference signal SRS transmission). The semi-static frame structure is configured as a flexible transmission direction on a certain OFDM symbol in slot 8. In this case, the transmission of semi-static configuration 2 will ultimately be performed on that OFDM symbol in slot 8, meaning that symbol is reset to the uplink transmission direction.

[0120] Implementation Method 5:

[0121] The base station can configure semi-static transmission for the terminal, which may include at least one of the following:

[0122] SPS (Semi-Persistent Scheduling) PDSCH transmission;

[0123] SPS (Semi-Persistent Scheduling) PUSCH transport;

[0124] PDCCH transmission;

[0125] PUCCH transmission;

[0126] Grant-free PUSCH transfer;

[0127] Grant-free PDSCH transmission;

[0128] SRS transmission;

[0129] CSI-RS transmission.

[0130] Different semi-static transmissions have different priorities. The priorities of different semi-static transmissions can be predefined by the system or configured by the base station in a semi-static manner.

[0131] For example, SRS and CSI-RS transmissions have the highest priority, followed by PDCCH and PUCCH transmissions, and then semi-static PDSCH and PUSCH transmissions. Grant-free PUSCH and Grant-free PDSCH transmissions have lower priority.

[0132] When a base station configures multiple semi-static transmissions for a terminal, if the time and / or frequency domain resources they require do not overlap, and their transmission directions all conform to the configuration of the semi-static frame structure and / or the SFI indication in the GC-PDCCH, then all of the multiple semi-static transmissions can be transmitted. If the time and / or frequency domain resources they require partially or completely overlap, then the higher-priority semi-static transmission can be transmitted, and the lower-priority semi-static transmission is canceled. The transmission directions of all the multiple semi-static transmissions must conform to the configuration of the semi-static frame structure and / or the SFI indication in the GC-PDCCH. Specifically, this includes the following two cases:

[0133] Case 1: The transmission direction of semi-static transmission 1 is the same as that of semi-static transmission 2. For example, the transmission directions of semi-static transmission 1 and semi-static transmission 2 are both downlink transmission (which can be SPS (Semi-Persistent Scheduling) physical downlink shared channel PDSCH transmission, physical downlink control channel PDCCH transmission, grant-free PDSCH transmission, or channel state information reference signal CSI-RS transmission). The semi-static frame structure is configured as downlink transmission or flexible transmission direction on the overlapping time and / or frequency domain resources.

[0134] Scenario 2: The transmission direction of semi-static transmission 1 is different from that of semi-static transmission 2. For example, semi-static transmission 1 is downlink transmission (which can be SPS (Semi-Persistent Scheduling) physical downlink shared channel PDSCH transmission, physical downlink control channel PDCCH transmission, grant-free PDSCH transmission, or channel state information reference signal CSI-RS transmission). Semi-static transmission 2 is uplink transmission (which can be SPS (Semi-Persistent Scheduling) physical uplink shared channel PDSCH transmission, physical uplink control channel PUCCH transmission, grant-free PUSCH transmission, or sounding reference signal SRS transmission). The semi-static frame structure is configured for flexible transmission direction on the overlapping time and / or frequency domain resources.

[0135] Example 4

[0136] Embodiments of this disclosure also provide a storage medium storing a computer program configured to execute the steps in any of the above method embodiments when running.

[0137] Optionally, in this embodiment, the storage medium may be configured to store a computer program for performing the following steps:

[0138] S1, determine the broadband demodulation reference signal DMRS for the control channel resources;

[0139] S2 performs rate matching for broadband DMRS.

[0140] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media capable of storing computer programs, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0141] Embodiments of this disclosure also provide an electronic device including a memory and a processor, the memory storing a computer program and the processor being configured to run the computer program to perform the steps in any of the above method embodiments.

[0142] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor and the input / output device is connected to the processor.

[0143] Optionally, in this embodiment, the processor can be configured to perform the following steps via a computer program:

[0144] S1, determine the broadband demodulation reference signal DMRS for the control channel resources;

[0145] S2 performs rate matching for broadband DMRS.

[0146] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementations, and will not be repeated here.

[0147] It will be apparent to those skilled in the art that the modules or steps of this disclosure described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. Optionally, they can be implemented using computer-executable program code, thereby storing them in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those presented herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, this disclosure is not limited to any particular combination of hardware and software.

[0148] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A rate matching method, characterized by, include: Determine the broadband demodulation reference signal (DMRS) for control channel resources; Rate matching is performed on the broadband DMRS; The broadband DMRS is rate-matched according to at least one of the following: Frequency domain resources of the search space set; frequency domain resources of the search space; Semi-static rate matching resources; Dynamic rate matching of resources; Rate matching indication signaling; Service channel resource allocation; Rate matching for the broadband DMRS includes: On a first resource in the search space to be blind-detected that intersects with the service channel resource, the resource element RE of the broadband DMRS on the first resource is subtracted from the service channel resource.

2. The method according to claim 1, characterized in that, Rate matching of the broadband DMRS includes at least one of the following: When the control channel resources contain multiple non-contiguous physical resource block (PRB) clusters in the frequency domain, the service channel performs rate matching on the REs of the broadband DMRS for one or more of the multiple non-contiguous PRB clusters. When the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain, for one or more PRB clusters that are mapped with a search space or a set of search spaces, the service channel performs rate matching on the RE of the broadband DMRS of the one or more PRB clusters. When the control channel resource contains multiple non-contiguous PRB clusters in the frequency domain, for one or more PRB clusters that overlap with the service channel resource, the service channel determines whether to perform rate matching on all or part of the REs of the broadband DMRS of the one or more PRB clusters according to the rate matching indication signaling.

3. The method according to claim 2, characterized in that, The REs of all or part of the broadband DMRS are the REs of the broadband DMRS within the rate matching resource set indicated by the rate matching indication signaling.

4. A rate matching device, characterized in that, include: The determination module is used to determine the wideband demodulation reference signal DMRS for control channel resources; The processing module is used to perform rate matching on the broadband DMRS; The broadband DMRS is rate-matched according to at least one of the following: Frequency domain resources of the search space set; frequency domain resources of the search space; semi-static rate matching resources; dynamic rate matching resources; rate matching indication signaling; allocation of service channel resources; The processing module is specifically used for: On a first resource in the search space to be blind-detected that intersects with the service channel resource, the resource element RE of the broadband DMRS on the first resource is subtracted from the service channel resource.

5. The apparatus according to claim 4, characterized in that, The processing module includes at least one of the following: The first processing unit is configured to perform rate matching of the RE of the broadband DMRS of one or more of the multiple non-contiguous PRB clusters when the control channel resources contain multiple non-contiguous physical resource blocks (PRB) clusters in the frequency domain. The second processing unit is configured to perform rate matching of the RE of the broadband DMRS of the one or more PRB clusters in the multiple non-contiguous PRB clusters when the control channel resources contain multiple non-contiguous PRB clusters in the frequency domain. The third processing unit is configured to, when the control channel resource contains multiple non-contiguous PRB clusters in the frequency domain, determine, based on rate matching indication signaling, whether to perform rate matching on all or part of the REs of the one or more PRB clusters that overlap with the service channel resource.

6. A storage medium, characterized in that, The storage medium stores a computer program, wherein the computer program is configured to execute the method described in any one of claims 1 to 3 when it is run.

7. An electronic device comprising a memory and a processor, characterized in that, The memory stores a computer program, and the processor is configured to run the computer program to perform the method described in any one of claims 1 to 3.

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