Resource determination method and device

Abstract

The present application provides a resource determination method and device, which relates to the field of communication technology, and is used to ensure that the DMRS corresponding to the PDSCH independently scheduled by multiple TRPs are aligned in the time domain in a scenario where multiple TRPs independently configure channel measurement reference signal configuration information, thereby improving the terminal's DMRS-based channel estimation performance. The method includes: the terminal receives N channel measurement reference signal configuration information, the channel measurement reference signal configuration information is used to indicate the time domain resources occupied by the channel measurement reference signal of a carrier / service cell / part of the bandwidth, and N is a positive integer; then, the terminal determines the OFDM symbol occupied by the DMRS in the first time unit based on the N channel measurement reference signal configuration information.

Description

[0001] This application is a divisional application. The application number of the original application is 201910557346.4, and the original application date is June 25, 2019. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of communication technology, and in particular to a resource determination method and device. Background Art

[0003] In order to obtain higher spectrum utilization, communication systems generally adopt the same-frequency networking mode. That is, multiple cells in the network can be deployed in the same frequency band. In this way, when the user is at the edge of the service cell, the user may be subject to the same-frequency interference of the neighboring cells of the service cell, which seriously limits the service quality and throughput of edge users. Therefore, in order to solve the interference problem between cells, Coordinated Multi-Point (CoMP) transmission technology has been widely used. Assisted multi-point transmission technology specifically refers to the collaborative participation of multiple transmission points (transmission reception point, TRP) in transmitting data for a terminal, or multiple TRPs jointly receiving data sent by a terminal. Based on the information interaction delay between multiple TRPs, CoMP transmission can be divided into ideal backhaul (IB) and non-ideal backhaul (NIB). In the NIB scenario, due to the large delay in information interaction between multiple TRPs, in order to ensure the performance of the communication system, a mechanism is introduced in which multiple TRPs independently send downlink control information (DCI) to independently schedule the terminal's physical downlink shared channel (PDSCH) and demodulation reference signal (DMRS).

[0004] Currently, in the CoMP transmission scenario, multiple TRPs in the collaborative set may all be configured for LTE base stations and NR base stations to be co-located. In this case, each TRP will be configured with cell-specific reference signal (CRS) configuration information to indicate the time-frequency resources occupied by the CRS of the TRP. In order to avoid interference between LTE CRS and the DMRS corresponding to the NR PDSCH, the DMRS corresponding to the PDSCH independently scheduled by a TRP may migrate in the time domain to avoid the orthogonal frequency division multiplexing (OFDM) symbols occupied by the CRS of the TRP. Due to the different CRS configuration information independently configured by different TRPs, the DMRS corresponding to the PDSCH scheduled by different TRPs are not aligned in the time domain. If the PDSCHs scheduled by multiple TRPs overlap in time-frequency resources, the DMRS corresponding to the two PDSCHs are not aligned in the time domain, which will cause mutual interference between the DMRS of one PDSCH and another PDSCH, thereby affecting the terminal's DMRS-based channel estimation performance. Summary of the invention

[0005] The present application provides a resource determination method and device for ensuring that the DMRS corresponding to the PDSCHs independently scheduled by multiple TRPs are aligned in the time domain.

[0006] In a first aspect, a resource determination method is provided, including: a terminal receives N channel measurement reference signal configuration information, the channel measurement reference signal configuration information is used to indicate the resources occupied by the channel measurement reference signal on a component carrier (CC) / serving cell / part of the bandwidth (BWP), the resources occupied by the channel measurement reference signal include time domain resources, and N is a positive integer; the terminal determines the OFDM symbol occupied by the DMRS in the first time unit according to the N channel measurement reference signal configuration information.

[0007] The channel measurement reference signal is a CRS, or a channel state information reference signal (CSI-RS), or a synchronization signal block (SSB), or a rate matching resource (RMR).

[0008] Based on the above technical solution, for any one of the multiple TRPs participating in the collaborative transmission, the OFDM symbol occupied by the DMRS of the TRP in the first time unit is determined based on N channel measurement reference signal configuration information, rather than only based on the channel measurement reference signal configuration information of the TRP. That is, the OFDM symbol occupied by the DMRS of a TRP will take into account the influence of the channel measurement reference signal configuration information of other TRPs, thereby ensuring that the OFDM symbol occupied by the DMRS of the TRP is the same as the OFDM symbol occupied by the DMRS of other TRPs, thereby ensuring the channel estimation performance of the terminal based on DMRS.

[0009] In one possible design, when the channel measurement reference signal configuration information is used to indicate the time-frequency resources occupied by the channel measurement reference signal, the channel measurement reference signal configuration information may include at least one of the following information: a period and offset in the time domain, the number and / or position of OFDM symbols occupied in a time slot or subframe, the number and / or position of occupied RBs, the number and / or position of subcarriers occupied in an RB, and the number and / or position of resource elements (RE).

[0010] In one possible design, the time-frequency resources occupied by the channel measurement reference signal include OFDM symbols, and any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information, wherein the OFDM symbol refers to an OFDM symbol in a specific time slot or subframe. In this way, mutual interference between the DMRS and the channel measurement reference signal is avoided.

[0011] In one possible design, if the OFDM symbols occupied by the channel measurement reference signal indicated by at least one channel measurement reference signal configuration information among N channel measurement reference signal configuration information include the first OFDM symbol, then the OFDM symbols occupied by the DMRS do not include the first OFDM symbol, and the OFDM symbols occupied by the DMRS include the second OFDM symbol.

[0012] In one possible design, if the OFDM symbols occupied by the channel measurement reference signals indicated by the N channel measurement reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

[0013] In one possible design, the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the starting OFDM symbol of the PDSCH corresponding to the DMRS. Specifically, if the number of consecutive OFDM symbols occupied by the DMRS is 1, that is, the DMRS is a single-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol in the time domain resources of the PDSCH, and if the number of consecutive OFDM symbols occupied by the DMRS is 2, that is, the DMRS is a double-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol and the second OFDM symbol in the time domain resources of the PDSCH.

[0014] In one possible design, if the number of OFDM symbols occupied by the PDSCH corresponding to the DMRS in a time slot or subframe is greater than or equal to 11, the first OFDM symbol and the second OFDM symbol are the last two OFDM symbols in the time domain resources of the PDSCH.

[0015] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol of the first time unit, and the second OFDM symbol is the 13th OFDM symbol of the first time unit.

[0016] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 8th OFDM symbol of the first time unit, the second OFDM symbol is the 9th OFDM symbol of the first time unit, or the second OFDM symbol is the 7th OFDM symbol of the first time unit.

[0017] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry DCI, and the DCI is used to schedule the PDSCH corresponding to the above-mentioned DMRS; and / or, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the code division multiplexing CDM group occupied by the DMRS.

[0018] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information. In this way, mutual interference between the PDSCH and the channel measurement reference signal is avoided.

[0019] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the positions of the REs occupied by the above control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information. In this way, the monitoring reliability of the control resource set is improved.

[0020] In one possible design, the PDSCH corresponding to the DMRS is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the first subset; and / or the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the second subset. The first subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. The second subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. It can be understood that the first subset and the second subset may be the same or different.

[0021] In one possible design, the method further includes: the terminal receives a first DCI and a second DCI, the first DCI is used to schedule a first PDSCH, the second DCI is used to schedule a second PDSCH, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, the second DCI is carried in a second control resource set, and the first control resource set and the second control resource set belong to different control resource set groups. The terminal determines the OFDM symbols occupied by the DMRS in the first time unit according to N channel measurement reference signal configuration information, including: the terminal determines the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to N channel measurement reference signal configuration information.

[0022] In one possible design, the method further includes: the terminal receives a first DCI and a second DCI, the first DCI is used to schedule a first PDSCH in a first time unit, the second DCI is used to schedule a second PDSCH in the first time unit, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, and the second DCI is carried in a second control resource set. The terminal determines the OFDM symbols occupied by the DMRS in the first time unit according to N channel measurement reference signal configuration information, including: the terminal determines the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to N channel measurement reference signal configuration information.

[0023] In one possible design, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information. For example, when at least one of the N channel measurement reference signal configuration information indicates the 12th OFDM symbol in the target time slot, then in the target time slot, neither the first DMRS nor the second DMRS occupies the 12th OFDM symbol in the target time slot, but occupies the 13th OFDM symbol in the target time slot. The target time slot can be any time slot in the time domain, and there is no limitation on this.

[0024] Specifically, when N channel measurement reference signal configuration information include first channel measurement reference signal configuration information and second channel measurement reference signal configuration information, neither the first DMRS nor the second DMRS occupies the OFDM symbols occupied by the channel measurement reference signal indicated by the first channel measurement reference signal configuration information, and neither the first DMRS nor the second DMRS occupies the OFDM symbols occupied by the channel measurement reference signal indicated by the second channel measurement reference signal configuration information.

[0025] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the first control resource set; and / or, one or more channel measurement reference signal configuration information is associated with the CDM group occupied by the first DMRS. Among them, the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the first control resource set can be referred to as the first RE; the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS can be referred to as the second RE.

[0026] In a possible design, the first PDSCH is not mapped on the first RE and / or the second RE. In this way, the terminal can determine the position of the RE used for mapping the first PDSCH in the time-frequency resources of the first PDSCH according to the position of the first RE and / or the second RE.

[0027] In one possible design, the first control resource set does not occupy the first RE and / or the second RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE. In this way, the terminal can determine whether to detect DCI on the first control resource set based on the position of the first RE and / or the second RE. Specifically, if the position of the RE occupied by the first control resource set overlaps with the position of the first RE and / or the second RE, the terminal does not detect the first DCI on the first control resource set; if the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE, the terminal detects the first DCI on the first control resource set.

[0028] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the second control resource set; and / or, one or more channel measurement reference signal configuration information is associated with the CDM group occupied by the second DMRS. Among them, the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the second control resource set can be referred to as the third RE; the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS can be referred to as the fourth RE.

[0029] In one possible design, the second PDSCH is not mapped on the third RE and / or the fourth RE. In this way, the terminal can determine the position of the RE used for the second PDSCH mapping in the time-frequency resources of the second PDSCH according to the position of the third RE and / or the fourth RE.

[0030] In one possible design, the second control resource set does not occupy the third RE and / or the fourth RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the third RE and / or the fourth RE. In this way, the terminal can determine whether to detect DCI on the second control resource set based on the position of the third RE and / or the fourth RE. Specifically, if the position of the RE occupied by the second control resource set overlaps with the position of the third RE and / or the fourth RE, the terminal does not detect the second DCI on the second control resource set; if the position of the RE occupied by the second control resource set does not overlap with the position of the third RE and / or the fourth RE, the terminal detects the second DCI on the second control resource set.

[0031] Among them, one or more channel measurement reference signal configuration information associated with the first control resource set is different from one or more channel measurement reference signal configuration information associated with the second control resource set. Alternatively, one or more channel measurement reference signal configuration information associated with the first control resource set is the same as one or more channel measurement reference signal configuration information associated with the second control resource set.

[0032] Among them, one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is different from one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS. One or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is the same as one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS.

[0033] In one possible design, the QCL information of the first PDSCH is different from the QCL information of the second PDSCH.

[0034] In one possible design, the CDM group occupied by the first DMRS is different from the CDM group occupied by the second DMRS.

[0035] In one possible design, the time domain resources occupied by the first PDSCH and the time domain position occupied by the second PDSCH partially overlap / completely overlap.

[0036] In one possible design, the first PDSCH and the second PDSCH are located in the same BWP / CC.

[0037] In one possible design, the first set of control resources and the second set of control resources are located in the same BWP / CC.

[0038] In one possible design, QCL information of the first set of control resources is different from QCL information of the second set of control resources.

[0039] In one possible design, the PUCCH resource set corresponding to the first control resource set is different from the PUCCH resource set corresponding to the second control resource set, or the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the first DCI is different from the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the second DCI.

[0040] In one possible design, a PDSCH configuration parameter set corresponding to the first control resource set is different from a PDSCH configuration parameter set corresponding to the second control resource set.

[0041] In one possible design, the candidate hybrid automatic repeat request (HARQ) processes corresponding to the first control resource set and the second control resource set are different candidates.

[0042] In one possible design, the time domain position occupied by the channel measurement reference signal indicated by each of the N channel measurement reference signal configuration information is the same, and the time domain position includes the position of the time slot and the position of the OFDM symbol occupied by the channel measurement reference signal in the time slot. In this way, for the DMRS corresponding to any PDSCH scheduled by TRP, the terminal can determine the OFDM symbol occupied by the DMRS in the first time unit based on one of the N channel measurement reference signal configuration information.

[0043] In a second aspect, a resource determination method is provided, including: a network device obtains N channel measurement reference signal configuration information, the channel measurement reference signal configuration information is used to indicate the resources occupied by the channel measurement reference signal on a carrier / service cell / part of the bandwidth, the resources occupied by the channel measurement reference signal include time domain resources, N is a positive integer; the network device determines the OFDM symbols occupied by the DMRS in the first time unit according to the N channel measurement reference signal configuration information.

[0044] Based on the above technical solution, for any one of the multiple TRPs participating in the collaborative transmission, the OFDM symbol occupied by the DMRS of the TRP in the first time unit is determined based on N channel measurement reference signal configuration information, rather than only based on the channel measurement reference signal configuration information of the TRP. That is, the OFDM symbol occupied by the DMRS of a TRP will take into account the influence of the channel measurement reference signal configuration information of other TRPs, thereby ensuring that the OFDM symbol occupied by the DMRS of the TRP is the same as the OFDM symbol occupied by the DMRS of other TRPs, thereby ensuring the channel estimation performance of the terminal based on DMRS.

[0045] In one possible design, when the channel measurement reference signal configuration information is used to indicate the time and frequency resources occupied by the channel measurement reference signal, the channel measurement reference signal configuration information may include at least one of the following: a period and offset in the time domain, the number and / or position of occupied OFDM symbols in a time slot or subframe, the number and / or position of occupied RBs, the number and / or position of occupied subcarriers in an RB, and the number and / or position of REs.

[0046] In one possible design, the time-frequency resources of the channel measurement reference signal include OFDM symbols; any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel measurement reference signal indicated by N channel measurement reference signal configuration information, wherein the OFDM symbol refers to an OFDM symbol within a specific time slot or subframe.

[0047] In one possible design, if the OFDM symbols occupied by the channel measurement reference signal indicated by at least one channel measurement reference signal configuration information among N channel measurement reference signal configuration information include the first OFDM symbol, then the OFDM symbols occupied by the DMRS do not include the first OFDM symbol, and the OFDM symbols occupied by the DMRS include the second OFDM symbol.

[0048] In one possible design, if the OFDM symbols occupied by the channel measurement reference signals indicated by the N channel measurement reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

[0049] In one possible design, the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the starting OFDM symbol of the PDSCH corresponding to the DMRS. Specifically, if the number of consecutive OFDM symbols occupied by the DMRS is 1, that is, the DMRS is a single-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol in the time domain resources of the PDSCH, and if the number of consecutive OFDM symbols occupied by the DMRS is 2, that is, the DMRS is a double-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol and the second OFDM symbol in the time domain resources of the PDSCH.

[0050] In a possible design, the number of OFDM symbols occupied by the PDSCH in a time slot or subframe is greater than 11. The first OFDM symbol and the second OFDM symbol are the last two OFDM symbols in the time domain resources of the PDSCH.

[0051] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol of the first time unit, and the second OFDM symbol is the 13th OFDM symbol of the first time unit.

[0052] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 8th OFDM symbol of the first time unit, the second OFDM symbol is the 9th OFDM symbol of the first time unit, or the second OFDM symbol is the 7th OFDM symbol of the first time unit.

[0053] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry DCI, and the DCI is used to schedule the PDSCH corresponding to the above-mentioned DMRS; and / or, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the code division multiplexing CDM group occupied by the DMRS.

[0054] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0055] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the positions of the REs occupied by the above-mentioned control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0056] In one possible design, the PDSCH corresponding to the DMRS is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the first subset; and / or the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the second subset. The first subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. The second subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. It can be understood that the first subset and the second subset may be the same or different.

[0057] In one possible design, the time domain position occupied by the channel measurement reference signal indicated by each of the N channel measurement reference signal configuration information is the same, and the time domain position includes the position of the time slot and the position of the OFDM symbol occupied by the channel measurement reference signal in the time slot.

[0058] According to a third aspect, a communication device is provided, comprising: a communication module, receiving N channel measurement reference signal configuration information, the channel measurement reference signal configuration information is used to indicate the resources occupied by the channel measurement reference signal on a carrier / service cell / part of the bandwidth, the resources occupied by the channel measurement reference signal include time domain resources, and N is a positive integer; a processing module, determining the OFDM symbols occupied by the DMRS in the first time unit according to the N channel measurement reference signal configuration information.

[0059] In one possible design, when the channel measurement reference signal configuration information is used to indicate the time and frequency resources occupied by the channel measurement reference signal, the channel measurement reference signal configuration information may include at least one of the following: a period and offset in the time domain, the number and / or position of occupied OFDM symbols in a time slot or subframe, the number and / or position of occupied RBs, the number and / or position of occupied subcarriers in an RB, and the number and / or position of REs.

[0060] In one possible design, the time-frequency resources occupied by the channel measurement reference signal include OFDM symbols, and any OFDM symbol occupied by DMRS does not overlap with any OFDM symbol occupied by the channel measurement reference signal indicated by N channel measurement reference signal configuration information, where the OFDM symbol refers to an OFDM symbol within a specific time slot or subframe.

[0061] In one possible design, if the OFDM symbols occupied by the channel measurement reference signal indicated by at least one channel measurement reference signal configuration information among N channel measurement reference signal configuration information include the first OFDM symbol, then the OFDM symbols occupied by the DMRS do not include the first OFDM symbol, and the OFDM symbols occupied by the DMRS include the second OFDM symbol.

[0062] In one possible design, if the OFDM symbols occupied by the channel measurement reference signals indicated by the N channel measurement reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

[0063] In one possible design, the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the starting OFDM symbol of the PDSCH corresponding to the DMRS. Specifically, if the number of consecutive OFDM symbols occupied by the DMRS is 1, that is, the DMRS is a single-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol in the time domain resources of the PDSCH, and if the number of consecutive OFDM symbols occupied by the DMRS is 2, that is, the DMRS is a double-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol and the second OFDM symbol in the time domain resources of the PDSCH.

[0064] In a possible design, the number of OFDM symbols occupied by the PDSCH in a time slot or subframe is greater than 11. The first OFDM symbol and the second OFDM symbol are the last two OFDM symbols in the time domain resources of the PDSCH.

[0065] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol of the first time unit, and the second OFDM symbol is the 13th OFDM symbol of the first time unit.

[0066] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 8th OFDM symbol of the first time unit, the second OFDM symbol is the 9th OFDM symbol of the first time unit, or the second OFDM symbol is the 7th OFDM symbol of the first time unit.

[0067] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry DCI, and the DCI is used to schedule the PDSCH corresponding to the above-mentioned DMRS; and / or, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the code division multiplexing CDM group occupied by the DMRS.

[0068] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0069] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the positions of the REs occupied by the above-mentioned control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0070] In one possible design, the PDSCH corresponding to the DMRS is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the first subset; and / or the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the second subset. The first subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. The second subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. It can be understood that the first subset and the second subset may be the same or different.

[0071] In one possible design, the communication module is further used to receive a first DCI and a second DCI, the first DCI is used to schedule a first PDSCH, the second DCI is used to schedule a second PDSCH, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, the second DCI is carried in a second control resource set, and the first control resource set and the second control resource set belong to different control resource set groups. A processing module is used to determine the OFDM symbols occupied by the DMRS in the first time unit according to N channel measurement reference signal configuration information, including: determining the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to the N channel measurement reference signal configuration information.

[0072] In one possible design, the communication module is further used to receive a first DCI and a second DCI, the first DCI is used to schedule a first PDSCH in a first time unit, the second DCI is used to schedule a second PDSCH in the first time unit, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, and the second DCI is carried in a second control resource set. A processing module is used to determine the OFDM symbols occupied by the DMRS in the first time unit according to N channel measurement reference signal configuration information, including: determining the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to N channel measurement reference signal configuration information.

[0073] In one possible design, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information. For example, when at least one of the N channel measurement reference signal configuration information indicates the 12th OFDM symbol in the target time slot, then in the target time slot, neither the first DMRS nor the second DMRS occupies the 12th OFDM symbol in the target time slot, but occupies the 13th OFDM symbol in the target time slot. The target time slot can be any time slot in the time domain, and there is no limitation on this.

[0074] Specifically, when N channel measurement reference signal configuration information include first channel measurement reference signal configuration information and second channel measurement reference signal configuration information, neither the first DMRS nor the second DMRS occupies the OFDM symbols occupied by the channel measurement reference signal indicated by the first channel measurement reference signal configuration information, and neither the first DMRS nor the second DMRS occupies the OFDM symbols occupied by the channel measurement reference signal indicated by the second channel measurement reference signal configuration information.

[0075] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the first control resource set; and / or, one or more channel measurement reference signal configuration information is associated with the CDM group occupied by the first DMRS. Among them, the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the first control resource set can be referred to as the first RE; the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS can be referred to as the second RE.

[0076] In a possible design, the first PDSCH is not mapped on the first RE and / or the second RE. In this way, the terminal can determine the position of the RE used for mapping the first PDSCH in the time-frequency resources of the first PDSCH according to the position of the first RE and / or the second RE.

[0077] In one possible design, the first control resource set does not occupy the first RE and / or the second RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE. In this way, the terminal can determine whether to detect DCI on the first control resource set based on the position of the first RE and / or the second RE. Specifically, if the position of the RE occupied by the first control resource set overlaps with the position of the first RE and / or the second RE, the terminal does not detect the first DCI on the first control resource set; if the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE, the terminal detects the first DCI on the first control resource set.

[0078] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the second control resource set; and / or, one or more channel measurement reference signal configuration information is associated with the CDM group occupied by the second DMRS. Among them, the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the second control resource set can be referred to as the third RE; the RE occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS can be referred to as the fourth RE.

[0079] In one possible design, the second PDSCH is not mapped on the third RE and / or the fourth RE. In this way, the terminal can determine the position of the RE used for the second PDSCH mapping in the time-frequency resources of the second PDSCH according to the position of the third RE and / or the fourth RE.

[0080] In one possible design, the second control resource set does not occupy the third RE and / or the fourth RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the third RE and / or the fourth RE. In this way, the terminal can determine whether to detect DCI on the second control resource set based on the position of the third RE and / or the fourth RE. Specifically, if the position of the RE occupied by the second control resource set overlaps with the position of the third RE and / or the fourth RE, the terminal does not detect the second DCI on the second control resource set; if the position of the RE occupied by the second control resource set does not overlap with the position of the third RE and / or the fourth RE, the terminal detects the second DCI on the second control resource set.

[0081] Among them, one or more channel measurement reference signal configuration information associated with the first control resource set is different from one or more channel measurement reference signal configuration information associated with the second control resource set. Alternatively, one or more channel measurement reference signal configuration information associated with the first control resource set is the same as one or more channel measurement reference signal configuration information associated with the second control resource set.

[0082] Among them, one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is different from one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS. One or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is the same as one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS.

[0083] In one possible design, the QCL information of the first PDSCH is different from the QCL information of the second PDSCH.

[0084] In one possible design, the CDM group occupied by the first DMRS is different from the CDM group occupied by the second DMRS.

[0085] In one possible design, the time domain resources occupied by the first PDSCH and the time domain position occupied by the second PDSCH partially overlap / completely overlap.

[0086] In one possible design, the first PDSCH and the second PDSCH are located in the same BWP / CC.

[0087] In one possible design, the first set of control resources and the second set of control resources are located in the same BWP / CC.

[0088] In one possible design, QCL information of the first set of control resources is different from QCL information of the second set of control resources.

[0089] In one possible design, the PUCCH resource set corresponding to the first control resource set is different from the PUCCH resource set corresponding to the second control resource set, or the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the first DCI is different from the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the second DCI.

[0090] In one possible design, a PDSCH configuration parameter set corresponding to the first control resource set is different from a PDSCH configuration parameter set corresponding to the second control resource set.

[0091] In one possible design, the candidates for the candidate hybrid automatic repeat request processes corresponding to the first control resource set and the second control resource set are different.

[0092] In one possible design, the time domain position occupied by the channel measurement reference signal indicated by each of the N channel measurement reference signal configuration information is the same, and the time domain position includes the position of the time slot and the position of the OFDM symbol occupied by the channel measurement reference signal in the time slot.

[0093] In a fourth aspect, a communication device is provided, comprising: a communication module, configured to obtain N channel measurement reference signal configuration information, the channel measurement reference signal configuration information is used to indicate resources occupied by a channel measurement reference signal on a carrier / service cell / part of the bandwidth, the resources occupied by the channel measurement reference signal include time domain resources, and N is a positive integer. A processing module, configured to determine the OFDM symbol occupied by the DMRS in the first time unit according to the N channel measurement reference signal configuration information.

[0094] In one possible design, when the channel measurement reference signal configuration information is used to indicate the time and frequency resources occupied by the channel measurement reference signal, the channel measurement reference signal configuration information may include at least one of the following: a period and offset in the time domain, the number and / or position of occupied OFDM symbols in a time slot or subframe, the number and / or position of occupied RBs, the number and / or position of occupied subcarriers in an RB, and the number and / or position of REs.

[0095] In one possible design, the time-frequency resources of the channel measurement reference signal include OFDM symbols; any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel measurement reference signal indicated by N channel measurement reference signal configuration information, wherein the OFDM symbol refers to an OFDM symbol within a specific time slot or subframe.

[0096] In one possible design, if the OFDM symbols occupied by the channel measurement reference signal indicated by at least one channel measurement reference signal configuration information among N channel measurement reference signal configuration information include the first OFDM symbol, then the OFDM symbols occupied by the DMRS do not include the first OFDM symbol, and the OFDM symbols occupied by the DMRS include the second OFDM symbol.

[0097] In one possible design, if the FDM symbols indicated by the N channel measurement reference signal configuration information do not include the first OFDM symbol, the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

[0098] In one possible design, the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the starting OFDM symbol of the PDSCH corresponding to the DMRS. Specifically, if the number of consecutive OFDM symbols occupied by the DMRS is 1, that is, the DMRS is a single-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol in the time domain resources of the PDSCH, and if the number of consecutive OFDM symbols occupied by the DMRS is 2, that is, the DMRS is a double-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol and the second OFDM symbol in the time domain resources of the PDSCH.

[0099] In a possible design, the number of OFDM symbols occupied by the PDSCH in a time slot or subframe is greater than 11. The first OFDM symbol and the second OFDM symbol are the last two OFDM symbols in the time domain resources of the PDSCH.

[0100] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol of the first time unit, and the second OFDM symbol is the 13th OFDM symbol of the first time unit.

[0101] In one possible design, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 8th OFDM symbol of the first time unit, the second OFDM symbol is the 9th OFDM symbol of the first time unit, or the second OFDM symbol is the 7th OFDM symbol of the first time unit.

[0102] In one possible design, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry DCI, and the DCI is used to schedule the PDSCH corresponding to the above-mentioned DMRS; and / or, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the code division multiplexing CDM group occupied by the DMRS.

[0103] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0104] In one possible design, the resources occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information include multiple REs, and the positions of the REs occupied by the above-mentioned control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information.

[0105] In one possible design, the PDSCH corresponding to the DMRS is not mapped to the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the first subset; and / or the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the second subset.

[0106] The first subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. The second subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. It can be understood that the first subset and the second subset may be the same or different.

[0107] In one possible design, the time domain position occupied by the channel measurement reference signal indicated by each of the N channel measurement reference signal configuration information is the same, and the time domain position includes the position of the time slot and the position of the OFDM symbol occupied by the channel measurement reference signal in the time slot.

[0108] In a fifth aspect, a communication device is provided, comprising: a processor and a memory, the memory being coupled to the processor, the memory storing instructions, and when the processor executes the instructions, the communication device executes the resource determination method involved in any one of the designs in the first aspect or the second aspect. Optionally, the communication device may also include a communication interface, the communication interface being used for the communication device to communicate with other devices, and illustratively, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface.

[0109] In a sixth aspect, a computer-readable storage medium is provided, in which instructions are stored. When the computer-readable storage medium is run on a computer, the computer can execute the resource determination method involved in any one of the designs in the first aspect or the second aspect.

[0110] In a seventh aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the resource determination method involved in any one of the designs in the first or second aspects above.

[0111] In an eighth aspect, a chip is provided, the chip comprising a processor, and when the processor executes an instruction, the processor is used to execute the resource determination method involved in any one of the designs in the first aspect or the second aspect. The instruction may come from a memory inside the chip or from a memory outside the chip. Optionally, the chip also includes an input and output circuit.

[0112] In a ninth aspect, a system is provided, comprising at least one communication device for executing the resource determination method involved in any one of the designs in the first aspect and at least one communication device for executing the resource determination method involved in any one of the designs in the second aspect.

[0113] Among them, the technical effects brought about by any design in the third aspect to the eighth aspect can refer to the technical effects brought about by the corresponding method above. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Figure 1 A schematic diagram of the location of a DMRS provided in an embodiment of the present application;

[0115] Figure 2 A schematic diagram of another DMRS location provided in an embodiment of the present application;

[0116] Figure 3 A schematic diagram of another DMRS location provided in an embodiment of the present application;

[0117] Figure 4 A schematic diagram of a CRS resource pattern provided in an embodiment of the present application;

[0118] Figure 5 A schematic diagram of another CRS resource pattern provided in an embodiment of the present application;

[0119] Figure 6 A schematic diagram of another CRS resource pattern provided in an embodiment of the present application;

[0120] Figure 7 A schematic diagram of the architecture of a communication system provided in an embodiment of the present application;

[0121] Figure 8 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0122] Fig. 9 A flowchart of a resource determination method provided in an embodiment of the present application;

[0123] Fig.10 A flowchart of a resource determination method provided in an embodiment of the present application;

[0124] Fig.11A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0125] Fig.12 A schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0126] Fig.13 A schematic diagram of the structure of a chip provided in an embodiment of the present application. DETAILED DESCRIPTION

[0127] In the description of this application, unless otherwise specified, " / " means "or", for example, A / B can mean A or B. "And / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, "at least one" means one or more, and "plurality" means two or more. The words "first", "second", etc. do not limit the quantity and execution order, and the words "first", "second", etc. do not limit them to be different.

[0128] It should be noted that, in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0129] In order to facilitate understanding of the technical solution of the present application, the following is a brief introduction to the terms involved in the present application.

[0130] 1. Time slot

[0131] In NR, for a normal cyclic prefix (CP), one slot contains 14 OFDM symbols. For an extended CP, one slot contains 12 OFDM symbols.

[0132] For ease of description, in the embodiments of the present application, unless otherwise specified, one time slot includes 14 OFDM symbols. In addition, in one time slot, the 14 OFDM symbols are numbered in chronological order from front to back, with the earliest OFDM symbol being numbered 0 and the latest OFDM symbol being numbered 13. In other words, one time slot includes OFDM symbol #0 to OFDM symbol #13.

[0133] 2. Subframe

[0134] In LTE, a subframe includes 14 OFDM symbols. In a subframe, the 14 OFDM symbols are numbered in chronological order from front to back, with the earliest OFDM symbol numbered 0 and the latest OFDM symbol numbered 13. That is, a time slot includes OFDM symbol #0 to OFDM symbol #13.

[0135] When the NR network and the LTE network use the same subcarrier spacing, the time slot in NR is equivalent to the subframe in LTE.

[0136] 3. Quasi-Co-Location (QCL) Information

[0137] QCL information is used to assist in describing the beamforming information and receiving process of the terminal receiving side, characterizes the large-scale characteristics of the channel, usually long-term observation values, and can also characterize the receiving beam information. Specifically, four types of QCL information are defined in the existing standards, namely:

[0138] QCL types A: Doppler shift, Doppler spread, average channel delay, delay spread;

[0139] QCL types B: Doppler shift, Doppler spread;

[0140] QCL types C: Average delay, Doppler shift;

[0141] QCL types D: Spatial Rx parameter.

[0142] The QCL information of PDSCH or PDCCH is defined by establishing an association relationship between the DMRS of PDSCH / PDCCH and a certain reference signal resource, that is, the QCL information of PDSCH / PDCCH can be determined based on the reception and measurement of the reference signal associated with its DMRS. For example, DMRS can be associated with the Channel State Information Reference Signal (CSI-RS), then the receiving beam (QCL Type-D) used by the terminal to receive CSI-RS can be used as the receiving beam for receiving DMRS.

[0143] 4. Code division multiplexing (CDM) group

[0144] The CDM group includes multiple antenna ports. Multiple antenna ports in the same CDM group reuse the same time-frequency resources, and multiple antenna ports in the same CDM group are distinguished in the form of code division, that is, the code domain resources of the sequences of multiple antenna ports in the same CDM are different. The code domain resources are usually orthogonal codes, such as orthogonal cover codes (OCC). The OCC code can be used in the time domain, frequency domain, spatial domain (beam domain), etc.

[0145] 5. Control resource set (CORESET), control resource set group

[0146] The control resource set is used to indicate the time-frequency resources where the physical downlink control channel (PDCCH) is located, and the PDCCH is used to carry DCI. In other words, the time-frequency resources occupied by the PDCCH are configured in units of CORESET, which represents the physical time-frequency resources that carry DCI within a DCI detection cycle. Usually, a CORESET can occupy 1-3 OFDM symbols in the time domain, and indicate the occupied bandwidth in the frequency domain with a granularity of 6RB. At the same time, the CORESET will also be configured with the QCL assumptions used to receive DCI and the corresponding DMRS on the physical time-frequency resources. From the perspective of the terminal, each CC and BWP used for communication will correspond to one or more CORESETs.

[0147] A control resource set group may include one or more control resource sets.

[0148] 6. DMRS

[0149] The terminal can perform channel estimation based on DMRS, and the result of channel estimation can be used to receive and demodulate the PDSCH corresponding to DMRS. DMRS will occupy part of the OFDM symbols in PDSCH. In other words, part of the OFDM symbols in PDSCH are used to carry DMRS. Specifically, the base station schedules the time-frequency resources of PDSCH through DCI. The base station and the terminal will pre-agree on the time-frequency resource positions occupied by DMRS in PDSCH. The DCI will also include the location information of DMRS, so that the terminal finally determines the time-frequency resources occupied by DMRS based on the pre-agreement position relationship of PDSCH and DMRS occupied time-frequency resources and the DMRS location information indicated in DCI. DMRS includes two types, one is single-symbol DMRS and the other is double-symbol DMRS. Single-symbol DMRS means that the number of OFDM symbols continuously occupied by DMRS is 1. Double-symbol DMRS means that the number of OFDM symbols continuously occupied by DMRS is 2. The following is an introduction using single-symbol DMRS as an example.

[0150] DMRS can be divided into front-loaded DMRS and additional DMRS according to the position of the OFDM symbol it occupies in the PDSCH.

[0151] The front-loaded DMRS occupies the first OFDM symbol of the PDSCH. The terminal can determine the first OFDM symbol of the PDSCH according to the time domain position of the PDSCH indicated in the DCI, thereby determining the OFDM symbol position occupied by the front-loaded DMRS.

[0152] When the base station configures the existence of additional DMRS through high-level signaling such as RRC signaling, the PDSCH will include additional DMRS, and the high-level signaling will also indicate the number of additional DMRS, for example, the number can be 1, 2, 3, etc. The position of the OFDM symbol occupied by the additional DMRS is determined according to the number of additional DMRS configured by RRC and the length of the corresponding PDSCH in a time slot. Among them, the length of the PDSCH in the time slot is the number of OFDM symbols occupied by the PDSCH in a time slot. Under normal circumstances, the additional DMRS will occupy at least one of the last two OFDM symbols in the OFDM symbol occupied by the PDSCH. When the number of additional DMRS is 2 or 3, in addition to the above-mentioned OFDM symbol positions, there will be further OFDM symbol positions of DMRS between the OFDM symbol position of the front-loaded DMRS and the OFDM symbol position of the tail of the PDSCH. Since extrapolation filtering of channel estimation based on DMRS for more than 2 OFDM symbols will lead to a significant loss in channel estimation performance, the DMRS located at the end of the PDSCH is more important to prevent the extrapolation from exceeding 2 OFDM symbols.

[0153] Exemplarily, the positions of OFDM symbols occupied by DMRS may refer to those shown in Table 1.

[0154] Among them, for PDSCH mapping type A, l d It is the number of OFDM symbols between the first OFDM symbol in the time slot and the last OFDM symbol in the time domain resource of the PDSCH.

[0155] l0 is used to indicate the position of the first OFDM symbol occupied by DMRS. For PDSCH mapping type A, l0=2 or 3, the reference point of l0 is the first OFDM symbol in the time slot. That is, when l0=2, the first OFDM symbol occupied by DMRS is OFDM symbol #2 in the time slot. When l0=3, the first OFDM symbol occupied by DMRS is OFDM symbol #3 in the time slot.

[0156] When l0=3, if the CRS configuration parameter has been configured, and the CRS configuration parameter indicates that the CRS occupies OFDM symbol #11 in the time slot where the PDSCH is located, l1=12. In other cases, l1=11.

[0157] For example, when l0=3, l d =12, l1=11, the position of DMRS can be as follows Figure 1 shown.

[0158] For example, when l0=3, l d =13, l1=11, the position of DMRS can be as follows Figure 2 shown.

[0159] For example, when l0=3, l d =14, l1=11, the position of DMRS can be as follows Figure 3 shown.

[0160] Table 1

[0161]

[0162] It should be noted that in the NIB scenario, since the time-frequency resources occupied by the two PDSCHs scheduled by the two base stations are determined in real time, it can be understood that when there is at least one additional DMRS in the DMRS of the two PDSCHs, in order to ensure that the DMRS on the PDSCHs of multiple TRPs are aligned in the time domain to ensure the performance of DMRS for channel estimation, the time domain positions of the PDSCHs scheduled by the two base stations need to be somewhat limited. Specifically, if two PDSCHs are scheduled in the same time slot, if the number of OFDM symbols of one of the PDSCHs is X, the number of OFDM symbols of the other PDSCH is also X, and the starting position of the PDSCH in the time domain must be consistent, so that the OFDM symbols occupied by the DMRS corresponding to the two PDSCHs (including front-loaded DMRS and additional DMRS) are the same. Optionally, X can be selected from 12-14.

[0163] 7. DMRS corresponding to PDSCH, PDSCH corresponding to DMRS

[0164] The DMRS corresponding to the PDSCH refers to the DMRS used to demodulate the PDSCH. The OFDM symbol occupied by the DMRS corresponding to the PDSCH is located on the time domain resource of the PDSCH.

[0165] The PDSCH corresponding to the DMRS refers to the PDSCH demodulated by the DMRS. The time domain resources of the PDSCH corresponding to the DMRS include the OFDM symbols occupied by the DMRS.

[0166] 8. CRS

[0167] In LTE, CRS is used to estimate the downlink physical channel to demodulate data information, and to perform channel measurement so that the terminal can obtain CSI information and report it to the base station. CRS supports configurations of 1, 2, and 4 antenna ports.

[0168] like Figure 4 As shown, it is a resource pattern of CRS supporting one antenna port. In this case, CRS occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in the subframe.

[0169] like Figure 5 As shown, it is a resource pattern of CRS supporting 2 antenna ports. In this case, CRS occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in the subframe.

[0170] like Figure 6 As shown, it is a resource pattern of CRS supporting 4 antenna ports. In this case, CRS occupies OFDM symbol #0, OFDM symbol #2, OFDM symbol #4, OFDM symbol #7, OFDM symbol #8, and OFDM symbol #11 in the subframe.

[0171] The above is a brief introduction to the technical terms involved in the embodiments of the present application, which will not be repeated below.

[0172] Currently, in the CoMP scenario, if multiple TRPs in the collaborative set are configured for LTE and NR co-station, then the multiple TRPs need to be configured with a set of independent CRS configuration parameters respectively. For example, different TRPs can configure CRS to occupy different time slots, and / or, configure CRS to occupy different OFDM symbols, and / or, configure CRS to occupy different RBs and subcarriers within each RB. Among them, the independent configuration of CRS configuration parameters by different TRPs represents that the service cells corresponding to different TRPs adopt different CRS time-frequency resource patterns. Different CRS configuration parameters can be configured through independent RRC signaling or through the same RRC signaling. For example, if there is a master TRP among the multiple TRPs in the collaborative set, the master TRP can send RRC signaling to other TRPs to configure a set of independent CRS configuration parameters for other TRPs.

[0173] When multiple TRPs independently configure CRS configuration parameters, the DMRS corresponding to the PDSCHs independently scheduled by multiple TRPs may be aligned in the time domain.

[0174] The following example uses TRP#1 and TRP#2 to form a collaborative set to serve a terminal. In time slot #1, TRP1 schedules PDSCH#1 through the DCI sent up and down by CORESET 1, and TRP#2 schedules PDSCH#2 through the DCI sent up and down by CORESET 2. The OFDM symbol lengths of PDSCH#1 and PDSCH#2 are both 13 or 14. The DMRS of PDSCH#1 is called DMRS#1, and the DMRS of PDSCH#2 is called DMRS#2. For DMRS#1 and DMRS#2, the number of additional DMRS is 1. The configuration information of CRS#1 corresponds to the time-frequency resources occupied by TRP#1 sending CRS 1, and the configuration information of CRS#2 corresponds to the time-frequency resources occupied by TRP#2 sending CRS 2. Since the configuration information of CRS#1 and the configuration information of CRS#2 are configured through independent RRC signaling, the configuration information of CRS#1 and the configuration information of CRS#2 may be different. For example, assume that the configuration information of CRS#1 indicates that CRS#1 occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in time slot #1, and the configuration information of CRS#2 indicates that CRS#2 occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in time slot #2. In this case, the OFDM symbol occupied by DMRS#1 is determined according to the configuration information of CRS#1, and the OFDM symbol occupied by DMRS#2 is determined according to the configuration information of CRS#2. In time slot #1, the OFDM symbol occupied by DMRS#1 needs to avoid the OFDM symbol occupied by CRS#1, so DMRS#1 occupies OFDM symbol #12. In time slot 1, since CRS#2 does not occupy any OFDM symbol, DMRS#2 can occupy OFDM symbol #11. As a result, DMRS#1 and DMRS#2 are not aligned in the time domain, thereby affecting the DMRS-based channel estimation performance of the terminal.

[0175] In order to solve the above technical problems, the present application provides a resource determination method, and the detailed description of the method can be found below.

[0176] The technical solution provided in the embodiments of the present application can be applied to various communication systems, for example, a new radio (NR) communication system using the fifth generation (5th generation, 5G) communication technology, a future evolution system or a variety of communication convergence systems, etc. The technical solution provided in the present application can be applied to a variety of application scenarios, for example, machine to machine (machine, M2M), macro and micro communication, enhanced mobile broadband (enhanced mobile broadband, eMBB), ultra-reliable and ultra-low latency communication (ultra-reliable & low latency communication, uRLLC) and massive machine type communication (massive machine type communication, mMTC) and other scenarios. These scenarios may include but are not limited to: communication scenarios between communication devices and communication devices, communication scenarios between network devices and network devices, and communication scenarios between network devices and communication devices. The following is an example of the communication scenario between a network device and a terminal.

[0177] In addition, the network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field can know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0178] Figure 7 A schematic diagram of the architecture of a communication system to which the technical solution provided by the present application is applicable is shown. The communication system may include multiple network devices ( Figure 7 Only two are shown) and one or more terminals ( Figure 7 Only one is shown in Figure 1). Figure 7 As shown, two network devices can communicate with the terminal at the same time.

[0179] The network device may be a base station or base station controller for wireless communication, etc. For example, the base station may include various types of base stations, such as micro base stations (also called small stations), macro base stations, relay stations, access points, etc., which are not specifically limited in the embodiments of the present application. In the embodiments of the present application, the base station may be a base station (base transceiver station, BTS) in the global system for mobile communications (global system for mobile communications, GSM), code division multiple access (code division multiple access, CDMA), a base station (node ​​B) in wideband code division multiple access (WCDMA), an evolutionary base station (eNB or e-NodeB) in long term evolution (long term evolution, LTE), an eNB in ​​the Internet of Things (IoT) or narrowband Internet of Things (NB-IoT), a base station in a future 5G mobile communication network or a future evolved public land mobile network (public land mobile network, PLMN), which is not limited in the embodiments of the present application. In the embodiment of the present application, the device for implementing the function of the network device may be a network device, or may be a device capable of supporting the network device to implement the function, such as a chip system. In the embodiment of the present application, the technical solution provided in the embodiment of the present application is described by taking the device for implementing the function of the network device as an example, that is, the network device.

[0180] The network equipment mentioned in this application, such as a base station, usually includes a baseband unit (BBU), a remote radio unit (RRU), an antenna, and a feeder for connecting the RRU and the antenna. Among them, the BBU is responsible for signal modulation. The RRU is responsible for radio frequency processing. The antenna is responsible for the conversion between the guided wave on the cable and the space wave in the air. On the one hand, the distributed base station greatly shortens the length of the feeder between the RRU and the antenna, which can reduce signal loss and reduce the cost of the feeder. On the other hand, the RRU plus the antenna is relatively small and can be installed anywhere, making network planning more flexible. In addition to the RRU remote, all BBUs can be concentrated and placed in the central office (Central Office, CO). Through this centralized approach, the number of base station rooms can be greatly reduced, the supporting equipment can be reduced, especially the energy consumption of air conditioners, and a large amount of carbon emissions can be reduced. In addition, after the scattered BBUs are concentrated into a BBU baseband pool, they can be managed and scheduled in a unified manner, and resource allocation is more flexible. In this mode, all physical base stations have evolved into virtual base stations. All virtual base stations share user data reception and transmission, channel quality and other information in the BBU baseband pool and cooperate with each other to achieve joint scheduling.

[0181] In some deployments, the base station may include a centralized unit (CU) and a distributed unit (DU). The base station may also include an active antenna unit (AAU). The CU implements some functions of the base station, and the DU implements some functions of the base station. For example, the CU is responsible for processing non-real-time protocols and services, and implementing the functions of the radio resource control (RRC) and packet data convergence protocol (PDCP) layers. The DU is responsible for processing physical layer protocols and real-time services, and implementing the functions of the radio link control (RLC), media access control (MAC) and physical (PHY) layers. The AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be converted from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling or PDCP layer signaling, can also be considered to be sent by the DU, or by the DU+AAU. It is understandable that the network device may be a device including one or more of a CU node, a DU node, and an AAU node. In addition, the CU may be classified as a network device in the RAN, or the CU may be classified as a network device in the core network (CN), which is not limited here.

[0182] A terminal is a device with wireless transceiver function. The terminal can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; it can also be deployed on the water (such as ships, etc.); it can also be deployed in the air (such as airplanes, balloons and satellites, etc.). The terminal device can be a user equipment (UE). Among them, UE includes handheld devices, vehicle-mounted devices, wearable devices or computing devices with wireless communication functions. Exemplarily, UE can be a mobile phone, a tablet computer or a computer with wireless transceiver function. The terminal device can also be a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in a smart grid, a wireless terminal in a smart city, a wireless terminal in a smart home, etc. In the embodiment of the present application, the device for realizing the function of the terminal can be a terminal, or it can be a device that can support the terminal to realize the function, such as a chip system. In the embodiment of the present application, the chip system can be composed of a chip, or it can include a chip and other discrete devices. In the embodiment of the present application, the technical solution provided in the embodiment of the present application is described by taking the device for realizing the function of the terminal as an example.

[0183] like Figure 8 As shown, the communication device includes: at least one processor 101 , a communication line 102 , a memory 103 and at least one communication interface 104 .

[0184] The processor 101 may be a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program of the present application.

[0185] The communication link 102 may include a pathway to transmit information between the above-mentioned components.

[0186] The communication interface 104 uses any transceiver or other device for communicating with other devices or communication networks, such as Ethernet, RAN, wireless local area networks (WLAN), etc.

[0187] The memory 103 can be a read-only memory (ROM) or other types of static storage devices that can store static information and instructions, a random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer, but is not limited to this. The memory can be independent and connected to the processor through a communication line 102. The memory can also be integrated with the processor. The memory provided in the embodiment of the present application can generally have non-volatility. Among them, the memory 103 is used to store the computer execution instructions for executing the scheme of the present application, and is controlled by the processor 101 to execute. The processor 101 is used to execute the computer-executable instructions stored in the memory 103, so as to implement the method provided in the following embodiments of the present application.

[0188] Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application code, which is not specifically limited in the embodiments of the present application.

[0189] In a specific implementation, as an embodiment, the processor 101 may include one or more CPUs, such as Figure 8 CPU0 and CPU1 in.

[0190] In a specific implementation, as an embodiment, the communication device may include multiple processors, such as Figure 8 1 and 107. Each of these processors may be a single-CPU processor or a multi-CPU processor. A processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (e.g., computer program instructions).

[0191] In a specific implementation, as an embodiment, the communication device may further include an output device 105 and an input device 106. The output device 105 communicates with the processor 101 and may display information in a variety of ways. For example, the output device 105 may be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 106 communicates with the processor 101 and may receive user input in a variety of ways. For example, the input device 106 may be a mouse, a keyboard, a touch screen device, or a sensor device.

[0192] The technical solution provided in the embodiments of the present application is described in detail below in conjunction with the accompanying drawings.

[0193] like Fig. 9 As shown, a resource determination method provided in an embodiment of the present application comprises the following steps:

[0194] S101. A communication device obtains N channel measurement reference signal configuration information.

[0195] The channel measurement reference signal configuration information is used to indicate the resources occupied by the channel measurement reference signal on a carrier / serving cell / part of the bandwidth. The resources occupied by the channel measurement reference signal include time-frequency resources.

[0196] The time-frequency resources occupied by the channel measurement reference signal include OFDM symbols. Alternatively, the time-frequency resources occupied by the channel measurement reference signal include multiple REs.

[0197] Optionally, if the channel measurement reference signal configuration information is used to indicate the time and frequency resources occupied by the channel measurement reference signal, the channel measurement reference signal configuration information may include at least one of the following information: period and offset in the time domain, the number and / or position of OFDM symbols occupied in a time slot / subframe, the number and / or position of occupied RBs, the number and / or position of occupied subcarriers in an RB, or the number and / or position of REs, etc.

[0198] Optionally, the channel measurement reference signal may include one of CRS, CSI-RS, SSB, or RMR.

[0199] The N channel measurement reference signal configuration information may correspond to the N TRPs one by one. That is, the N channel measurement reference signal configuration information may be independently configured for the N TRPs. N is a positive integer.

[0200] In the case where the communication device is any one of the multiple TRPs participating in the assisted transmission, step S101 can be specifically implemented as follows: the TRP generates its own channel measurement reference signal configuration information, and the TRP obtains N-1 channel measurement reference signal configuration information from other TRPs participating in the assisted transmission. Alternatively, the TRP obtains N channel measurement reference signal configuration information through other network devices (such as a core network, a management device, or a master TRP).

[0201] In the case where the communication device is a terminal, step S101 can be specifically implemented as follows: the terminal receives the channel measurement reference signal configuration information sent by each of the N TRPs respectively. Alternatively, the terminal receives the channel measurement reference signal configuration information sent by one or more TRPs among the N TRPs, where one TRP can send multiple channel measurement reference signal configuration information.

[0202] Optionally, the N channel sounding reference signal configuration information may be received by the terminal in the same time unit, or may be received by the terminal in different time units respectively.

[0203] S102: The communication device determines the OFDM symbols occupied by the DMRS in the first time unit according to N channel measurement reference signal configuration information.

[0204] Optionally, the first time unit may be a time slot, a mini-time slot, a subframe, or a transmission time interval, etc., in which the PDSCH corresponding to the DMRS is located, and the present invention is not limited thereto. Alternatively, the first time unit may be a time domain resource occupied by the PDSCH corresponding to the DMRS. It can be understood that the PDSCH corresponding to the DMRS is the PDSCH demodulated using the DMRS. Therefore, the DMRS may also be referred to as the DMRS of the PDSCH, or the DMRS corresponding to the PDSCH.

[0205] As an implementation method, if the time domain position occupied by the channel measurement reference signal indicated by each channel measurement reference signal configuration information in N channel measurement reference signal configuration information is the same, the communication device can determine the OFDM symbol occupied by the DMRS in the first time unit based on one channel measurement reference signal configuration information in the N channel measurement reference signal configuration information.

[0206] As another implementation method, if the time domain positions occupied by the channel measurement reference signals indicated by at least two of the N channel measurement reference signal configuration information are different, the communication device determines the OFDM symbols occupied by the DMRS in the first time unit based on the N channel measurement reference signal configuration information.

[0207] The time domain position occupied by the above-mentioned channel measurement reference signal includes: the position of the time slot, and the position of the OFDM symbol occupied by the channel measurement reference signal in the time slot.

[0208] In an embodiment of the present application, within the first time unit, any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel measurement reference signal indicated by N channel measurement reference signal configuration information, wherein the OFDM symbol refers to an OFDM symbol within a specific time slot or subframe.

[0209] It should be noted that the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information specifically include: the OFDM symbols occupied by the channel sounding reference signal indicated by each channel sounding reference signal configuration information in the N channel sounding reference signal configuration information.

[0210] Optionally, in order to ensure that the OFDM symbols occupied by the DMRS do not overlap with the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information, the OFDM symbols occupied by the DMRS satisfy the following rules:

[0211] Rule 1: If the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

[0212] Rule 2: If the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information include the first OFDM symbol, then the OFDM symbols occupied by the DMRS do not include the first OFDM symbol, and the OFDM symbols occupied by the DMRS include the second OFDM symbol.

[0213] It can be understood that the first OFDM symbol and the second OFDM symbol are two different OFDM symbols in the same time slot or subframe. Exemplarily, the second OFDM symbol can be the OFDM symbol before the first OFDM symbol, for example, the first OFDM symbol is OFDM symbol #11, and the second OFDM symbol is OFDM symbol #10. Alternatively, the second OFDM symbol can be the OFDM symbol after the first OFDM symbol, for example, the first OFDM symbol is OFDM symbol #11, and the second OFDM symbol is OFDM symbol #12. The embodiment of the present application does not limit the positional relationship between the first OFDM symbol and the second OFDM symbol.

[0214] It should be noted that the position of the first OFDM symbol is the best position for channel estimation. Therefore, when the first OFDM symbol is not used to carry CRS, the first OFDM symbol is used to carry DMRS; however, when the first OFDM symbol is used to carry CRS, in order to avoid the conflict between CRS and DMRS, the first OFDM symbol is not used to carry DMRS. In this case, DMRS migrates from the first OFDM symbol to the second OFDM symbol.

[0215] Optionally, the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the starting OFDM symbol of the PDSCH corresponding to the DMRS. Specifically, if the number of consecutive OFDM symbols occupied by the DMRS is 1, that is, the DMRS is a single-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol in the time domain resources of the PDSCH, and if the number of consecutive OFDM symbols occupied by the DMRS is 2, that is, the DMRS is a double-symbol DMRS, then the first OFDM symbol and the second OFDM symbol are OFDM symbols other than the first OFDM symbol and the second OFDM symbol in the time domain resources of the PDSCH.

[0216] Optionally, if the number of OFDM symbols occupied by the PDSCH corresponding to the DMRS in a time slot or subframe is greater than or equal to 11, the first OFDM symbol and the second OFDM symbol are the last two OFDM symbols in the time domain resources of the PDSCH.

[0217] Optionally, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol of the first time unit, and the second OFDM symbol is the 13th OFDM symbol of the first time unit. In this case, the embodiment of the present application redefines the value rule of l1 in Table 1. That is, if the OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information includes the 12th OFDM symbol in the first time unit, then l1=12; if the OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information does not include the 12th OFDM symbol in the first time unit, then l1=11.

[0218] Optionally, the first time unit is the time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 8th OFDM symbol of the first time unit, the second OFDM symbol is the 9th OFDM symbol of the first time unit, or the second OFDM symbol is the 7th OFDM symbol of the first time unit.

[0219] The above rule 1 and rule 2 may be applicable to various DMRS configurations. For example, the number of additional DMRSs may be any one of 1-4.

[0220] It is understandable that, in the absence of contradiction, the above-mentioned Rule 1 and Rule 2 can be implemented separately or together, and this application does not limit this.

[0221] It can be understood that when the communication device is a TRP, after determining the OFDM symbol occupied by the DMRS in the first time unit, the TRP can transmit the PDSCH in the first time unit and send the DMRS on the OFDM symbol occupied by the DMRS in the first time unit.

[0222] It can be understood that, in the case where the communication device is a terminal, after determining the OFDM symbols occupied by the DMRS in the first time unit, the terminal can receive the DMRS on the OFDM symbols occupied by the DMRS in the first time unit.

[0223] based on Fig. 9 In the technical solution shown, for any one of the multiple TRPs participating in the collaborative transmission, the OFDM symbol occupied by the DMRS of the TRP in the first time unit is determined based on N channel measurement reference signal configuration information, rather than only based on the channel measurement reference signal configuration information of the TRP. That is, the OFDM symbol occupied by the DMRS of one TRP will take into account the influence of the channel measurement reference signal configuration information of other TRPs, thereby ensuring that the OFDM symbol occupied by the DMRS of the TRP is the same as the OFDM symbol occupied by the DMRS of other TRPs, thereby ensuring the channel estimation performance of the terminal based on DMRS.

[0224] In an embodiment of the present application, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry DCI, and the DCI is used to schedule the PDSCH corresponding to the above-mentioned DMRS; and / or, one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with the CDM group occupied by the DMRS.

[0225] It should be noted that the association between the channel measurement reference signal configuration information and the control resource set refers to the association relationship between the channel measurement reference signal configuration information and the control resource set. Based on the association relationship between the channel measurement reference signal configuration information and the control resource set, the base station or the terminal can determine a control resource set associated with the channel measurement reference signal configuration information, or the base station or the terminal can determine the channel measurement reference signal configuration information associated with a control resource set.

[0226] The association relationship between the above-mentioned channel measurement reference signal configuration information and the control resource set may also be referred to as the correspondence relationship between the channel measurement reference signal configuration information and the control resource set, for example: a one-to-one correspondence relationship, a one-to-many correspondence relationship, or a many-to-one correspondence relationship between the channel measurement reference signal configuration information and the control resource set. The embodiments of the present application are not limited to this.

[0227] Optionally, based on the association between the channel measurement reference signal configuration information and the control resource set, for a control resource set, the terminal determines whether to detect DCI on the control resource set according to the channel measurement reference signal configuration information associated with the control resource set. Specifically, if the position of the RE occupied by the control resource set overlaps with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the control resource set, the terminal does not detect DCI on the control resource set. Otherwise, the terminal detects DCI on the control resource set.

[0228] Optionally, based on the association between the channel measurement reference signal configuration information and the control resource set, for a control resource set, the base station determines the resource configuration of the control resource set according to the channel measurement reference signal configuration information associated with the control resource set, where the resource configuration includes the configuration of time-frequency resources. Specifically, the base station determines that the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the control resource set.

[0229] Optionally, based on the association between the channel measurement reference signal configuration information and the control resource set, for a control resource set, the base station or terminal can determine the RE mapped with the target PDSCH according to the channel measurement reference signal configuration information associated with the control resource set, and the target PDSCH is the DCI-scheduled PDSCH carried by the control resource set. Specifically, the target PDSCH is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the control resource set. In other words, the base station does not send the target PDSCH on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the control resource set. The terminal does not receive PDSCH on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the control resource set.

[0230] It should be noted that the channel measurement reference signal configuration information is associated with the CDM group, which means that there is an association relationship between the channel measurement reference signal and the CDM group. Based on the association relationship between the channel measurement reference signal and the CDM group, the base station or the terminal can determine the CDM group associated with a channel measurement reference signal configuration information, or the base station or the terminal can determine the channel measurement reference signal configuration information associated with a CDM group.

[0231] The association relationship between the above-mentioned channel measurement reference signal configuration information and the CDM group may also be referred to as the correspondence relationship between the channel measurement reference signal configuration information and the CDM group, for example: a one-to-one correspondence relationship, a one-to-many correspondence relationship, or a many-to-one correspondence relationship between the channel measurement reference signal configuration information and the CDM group. The embodiments of the present application are not limited to this.

[0232] Optionally, based on the association between the channel measurement reference signal configuration information and the CDM group, for a CDM group, the base station or terminal can determine the RE mapped with the PDSCH corresponding to the CDM group according to the channel measurement reference signal configuration information associated with the CDM group, and the PDSCH corresponding to the CDM group refers to the PDSCH corresponding to the DMRS occupying the CDM group. Specifically, the PDSCH corresponding to the CDM group is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the CDM group. In other words, the base station does not send the PDSCH corresponding to the CDM group on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the CDM group. The terminal does not receive the PDSCH corresponding to the CDM group on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information associated with the CDM group.

[0233] The channel measurement reference signal configuration information may include an identifier / index value of a control resource set to indicate the control resource set associated with the channel measurement reference signal configuration information. And / or, the channel measurement reference signal configuration information may include an identifier / index value of a CDM group to indicate the CDM group associated with the channel measurement reference signal configuration.

[0234] Alternatively, the network device may send indication information to the terminal to indicate the control resource set associated with the channel sounding reference signal configuration information and / or the CDM group associated with the channel sounding reference signal configuration information.

[0235] In the embodiment of the present application, the resources occupied by the channel sounding reference signal indicated by the one or more channel sounding reference signal configuration information include multiple REs. It can be understood that one RE occupies one OFDM symbol in the time domain and one subcarrier in the frequency domain.

[0236] Optionally, the PDSCH corresponding to the DMRS is not mapped to the REs occupied by the channel measurement reference signal indicated by the one or more channel measurement reference signal configuration information to avoid mutual interference between the PDSCH corresponding to the DMRS and the CRS.

[0237] Optionally, the positions of REs occupied by the control resource set do not overlap with the positions of REs occupied by the channel sounding reference signals indicated by the one or more channel sounding reference signal configuration information.

[0238] The positions of REs occupied by the above control resource set specifically refer to the positions of REs that the terminal needs to monitor when monitoring the control resource set.

[0239] In an embodiment of the present application, if the position of RE occupied by a control resource set overlaps with the position of RE occupied by a channel measurement reference signal indicated by one or more channel measurement reference signal configuration information associated with the control resource set, the terminal does not monitor the control resource set.

[0240] In an embodiment of the present application, the PDSCH corresponding to the DMRS is not mapped on the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the first subset; and / or, the position of the RE occupied by the control resource set does not overlap with the position of the RE occupied by the channel measurement reference signal indicated by the channel measurement reference signal configuration information in the second subset. Among them, the first subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. The second subset includes one or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information. It can be understood that the first subset and the second subset may be the same or different.

[0241] The following is a scenario where two TRPs assist in transmission. Fig. 9 The illustrated embodiment is described.

[0242] like Fig.10 As shown, another resource determination method provided in an embodiment of the present application includes the following steps:

[0243] S201. A terminal receives a first DCI and a second DCI.

[0244] The first DCI is used to schedule the first PDSCH, and the second DCI is used to schedule the second PDSCH.

[0245] In this embodiment of the present application, the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the first DCI is different from the PUCCH candidate resource pool corresponding to the PUCCH resource selection field in the second DCI.

[0246] In the embodiment of the present application, the first PDSCH and the second PDSCH are located in the same BWP / CC. The first PDSCH is different from the second PDSCH. Specifically, the QCL information of the first PDSCH is different from the QCL information of the second PDSCH.

[0247] Optionally, the time domain resources occupied by the first PDSCH and the time domain position occupied by the second PDSCH partially overlap / completely overlap.

[0248] In the embodiment of the present application, the DMRS of the first PDSCH is referred to as the first DMRS, and the DMRS of the second PDSCH is referred to as the second DMRS. The CDM group occupied by the first DMRS is different from the CDM group occupied by the second DMRS.

[0249] In an embodiment of the present application, the first DCI is carried in a first control resource set, and the second DCI is carried in a second control resource set. The first control resource set and the second control resource set are located in the same BWP / CC. The first control resource set is different from the second control resource set, including at least one of the following situations: (1) The QCL information of the first control resource set is different from the QCL information of the second control resource set. (2) The PUCCH resource set corresponding to the first control resource set is different from the PUCCH resource set corresponding to the second control resource set. (3) The PDSCH configuration parameter set corresponding to the first control resource set is different from the PDSCH configuration parameter set corresponding to the second control resource set. (4) The candidates for the candidate hybrid automatic repeat request process corresponding to the first control resource set and the second control resource set are different.

[0250] As an implementation manner, the terminal may receive the first DCI and the second DCI in the same time unit; or, the terminal may receive the first DCI and the second DCI in different time units, respectively.

[0251] Optionally, if the first DCI is used to schedule the first PDSCH within the first time unit, and the second DCI is used to schedule the second PDSCH within the first time unit, the terminal may know that the first DCI and the second DCI come from different TRPs.

[0252] Optionally, if the first control resource set and the second control resource set belong to two different control resource set groups, the terminal may learn that the first DCI and the second DCI come from different TRPs.

[0253] S202. The terminal receives N channel measurement reference signal configuration information.

[0254] Among them, the N channel measurement reference signal configuration information comes from different TRPs.

[0255] In the scenario of two TRPs cooperatively transmitting, the N channel measurement reference signal configuration information may include first channel measurement reference signal configuration information and / or second channel measurement reference signal configuration information, wherein the first channel measurement reference signal configuration information is different from the second channel measurement reference signal configuration.

[0256] It should be noted that, for the description of the channel sounding reference signal configuration information, reference may be made to step S101.

[0257] S203: The terminal determines, according to N channel measurement reference signal configuration information, an OFDM symbol occupied by a first DMRS and an OFDM symbol occupied by a second DMRS in a first time unit.

[0258] In an embodiment of the present application, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel measurement reference signal indicated by the N channel measurement reference signal configuration information. For example, when at least one of the N channel measurement reference signal configuration information indicates the 12th OFDM symbol in the target time slot, then in the target time slot, neither the first DMRS nor the second DMRS occupies the 12th OFDM symbol in the target time slot, but occupies the 13th OFDM symbol in the target time slot. The target time slot can be any time slot in the time domain, and there is no limitation on this.

[0259] The following specifically introduces step S203 in combination with different situations of N channel measurement reference signal configuration information.

[0260] (1) When the N channel sounding reference signal configuration information only includes the first channel sounding reference signal configuration information, the terminal determines the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to the first channel sounding reference signal configuration information.

[0261] It should be noted that, in the first time unit, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel sounding reference signal indicated by the first channel sounding reference signal configuration information.

[0262] (2) When the N channel sounding reference signal configuration information only includes the second channel sounding reference signal configuration information, the terminal determines the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to the second channel sounding reference signal configuration information.

[0263] That is, in the first time unit, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel sounding reference signal indicated by the second channel sounding reference signal configuration information.

[0264] (3) When the N channel measurement reference signal configuration information only include the first channel measurement reference signal configuration information and the second channel measurement reference signal configuration information, the terminal determines the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit according to the first channel measurement reference signal configuration information and the second channel measurement reference signal configuration information.

[0265] It should be noted that, in the first time unit, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel measurement reference signal indicated by the first channel measurement reference signal configuration information; and, neither the first DMRS nor the second DMRS occupies the OFDM symbol occupied by the channel measurement reference signal indicated by the second channel measurement reference signal configuration information.

[0266] It can be understood that the determination method of the OFDM symbol occupied by the first DMRS and the OFDM symbol occupied by the second OFDM symbol can refer to the above step S102, which will not be repeated here.

[0267] based on Fig.10 In the technical solution shown, in the scenario of cooperative transmission of two TRPs, since the OFDM symbols occupied by the first DMRS are determined based on N channel measurement reference signal configuration information, the OFDM symbols occupied by the second DMRS are determined based on N channel measurement reference signal configuration information. Therefore, the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS are the same, that is, the first DMRS and the second DMRS are aligned in the time domain, thereby avoiding mutual interference between the first DMRS and the data on the second PDSCH, or mutual interference between the second DMRS and the data on the first PDSCH.

[0268] Exemplarily, in time slot #1, TRP1 schedules PDSCH #1, TRP #2 schedules PDSCH #2, and the symbol lengths of PDSCH #1 and PDSCH #2 are both 13 or 14. PDSCH #1 corresponds to DMRS #1, and PDSCH #2 corresponds to DMRS #2. For DMRS #1 and DMRS #2, the number of additional DMRS is 1. The terminal receives the configuration information of CRS #1 sent by TRP #1, and the terminal receives the configuration information of CRS #2 sent by TRP #2. The configuration information of CRS #1 indicates that CRS #1 occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in time slot #1. The configuration information of CRS #2 indicates that CRS #1 occupies OFDM symbol #0, OFDM symbol #4, OFDM symbol #7, and OFDM symbol #11 in time slot #2. In this case, the OFDM symbol occupied by DMRS#1 is determined according to the configuration information of CRS#1 and the configuration information of CRS#2, and the OFDM symbol occupied by DMRS#2 is determined according to the configuration information of CRS#1 and the configuration information of CRS#2. Therefore, in order to avoid occupying the OFDM symbol occupied by CRS#1, both DMRS#1 and DMRS#2 occupy OFDM symbol #12 in time slot #1, and neither DMRS#1 nor DMRS#2 occupies OFDM symbol #11 in time slot #1. It can be seen that compared with the prior art, the technical solution of the embodiment of the present application can ensure that when different TRPs schedule PDSCH in the same time unit, the DMRSs of different TRPs are aligned in the time domain.

[0269] Optionally, one or more channel sounding reference signal configuration information among the N channel sounding reference signal configuration information are associated with the first control resource set; and / or, one or more channel sounding reference signal configuration information are associated with the CDM group occupied by the first DMRS.

[0270] Among them, the RE occupied by the channel measurement reference signal indicated by one or more channel measurement reference signal configuration information associated with the first control resource set can be referred to as the first RE; the RE occupied by the channel measurement reference signal indicated by one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS can be referred to as the second RE.

[0271] Optionally, the first PDSCH is not mapped on the first RE and / or the second RE. In this way, the terminal can determine the position of the RE used for mapping the first PDSCH in the time-frequency resources of the first PDSCH according to the position of the first RE and / or the second RE.

[0272] Optionally, the first control resource set does not occupy the first RE and / or the second RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE. In this way, the terminal can determine whether to detect DCI on the first control resource set based on the position of the first RE and / or the second RE. Specifically, if the position of the RE occupied by the first control resource set overlaps with the position of the first RE and / or the second RE, the terminal does not detect the first DCI on the first control resource set; if the position of the RE occupied by the first control resource set does not overlap with the position of the first RE and / or the second RE, the terminal detects the first DCI on the first control resource set.

[0273] Optionally, one or more channel sounding reference signal configuration information among the N channel sounding reference signal configuration information are associated with a second control resource set; and / or, one or more channel sounding reference signal configuration information are associated with a CDM group occupied by a second DMRS.

[0274] Among them, the RE occupied by the channel measurement reference signal indicated by one or more channel measurement reference signal configuration information associated with the second control resource set can be referred to as the third RE; the RE occupied by the channel measurement reference signal indicated by one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS can be referred to as the fourth RE.

[0275] Optionally, the second PDSCH is not mapped on the third RE and / or the fourth RE. In this way, the terminal can determine the position of the RE used for second PDSCH mapping in the time-frequency resources of the second PDSCH according to the position of the third RE and / or the fourth RE.

[0276] Optionally, the second control resource set does not occupy the third RE and / or the fourth RE. In other words, the position of the RE occupied by the first control resource set does not overlap with the position of the third RE and / or the fourth RE. In this way, the terminal can determine whether to detect DCI on the second control resource set based on the position of the third RE and / or the fourth RE. Specifically, if the position of the RE occupied by the second control resource set overlaps with the position of the third RE and / or the fourth RE, the terminal does not detect the second DCI on the second control resource set; if the position of the RE occupied by the second control resource set does not overlap with the position of the third RE and / or the fourth RE, the terminal detects the second DCI on the second control resource set.

[0277] In an embodiment of the present application, one or more channel measurement reference signal configuration information associated with the first control resource set is different from one or more channel measurement reference signal configuration information associated with the second control resource set. Alternatively, one or more channel measurement reference signal configuration information associated with the first control resource set is the same as one or more channel measurement reference signal configuration information associated with the second control resource set.

[0278] In an embodiment of the present application, one or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is different from one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS. One or more channel measurement reference signal configuration information associated with the CDM group occupied by the first DMRS is the same as one or more channel measurement reference signal configuration information associated with the CDM group occupied by the second DMRS.

[0279] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the interaction between each network element. It is understandable that each network element, such as a terminal and a network device, includes a hardware structure or software module corresponding to each function, or a combination of the two, in order to implement the above functions. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed in this document, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0280] The embodiment of the present application can divide the functional modules of the terminal and the network device according to the above method example. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation. The following is an example of dividing each functional module corresponding to each function:

[0281] Fig.11 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. Fig.11 As shown, the communication device includes a processing module 201 and a communication module 202. The processing module 201 is used to support the communication device to execute Fig. 9 In step S102, Fig.10The communication module 202 is used to support the communication device to perform step S203 in the embodiment of the present invention, and / or other processes used to support the technical solution described in this article. Fig. 9 Step S101 in Fig.10 Steps S201 and S202 in , and / or other processes used to support the technical solutions described in this article.

[0282] As an example, combining Figure 4 The communication device shown, Fig.11 The communication module 202 in the embodiment may be composed of Figure 8 The communication interface 104 is implemented in Fig.11 The processing module 201 in the embodiment may be composed of Figure 8 The processor 101 in the embodiment is implemented, and the embodiment of the present application does not impose any limitation on this.

[0283] Fig.12 A schematic diagram of the structure of a communication device provided in an embodiment of the present application. Fig.12 As shown, the communication device includes a processing module 301 and a communication module 302. The processing module 301 is used to support the communication device to execute Fig. 9 The communication module 302 is used to support the communication device to perform step S202 in the embodiment of the present invention, and / or other processes used to support the technical solution described in this article. Fig. 9 Step S201 in, and / or other processes used to support the technical solutions described in this article.

[0284] As an example, combining Figure 8 The communication device shown, Fig.12 The communication module 302 in the embodiment may be composed of Figure 8 The communication interface 104 is implemented in Fig.12 The processing module 301 in the embodiment can be composed of Figure 8 The processor 101 in the embodiment is implemented, and the embodiment of the present application does not impose any limitation on this.

[0285] The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions; when the computer-readable storage medium is executed on a communication device, the communication device executes the following Fig. 9 and Fig.10The method shown. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium, or a semiconductor medium (e.g., a solid state disk (SSD)), etc.

[0286] The present application also provides a computer program product including computer instructions, which, when executed on a communication device, enables the communication device to execute Fig. 9 and Fig.10 The method shown.

[0287] Fig.13 A schematic diagram of the structure of a chip provided in an embodiment of the present application. Fig.13 The chip shown can be a general-purpose processor or a dedicated processor. The chip includes a processor 401. The processor 401 is used to support the communication device to execute Fig. 9 and Fig.10 The technical solution shown.

[0288] Optionally, the chip further includes a transceiver pin 402, which is used to receive control from the processor 401 and to support the communication device to execute Fig. 9 and Fig.10 The technical solution shown.

[0289] Optional, Fig.13 The chip shown may further include: a storage medium 403 .

[0290] It should be noted that Fig.13 The chip shown can be implemented using the following circuits or devices: one or more field programmable gate arrays (FPGAs), programmable logic devices (PLDs), controllers, state machines, gate logic, discrete hardware components, any other suitable circuits, or any combination of circuits that can perform the various functions described throughout this application.

[0291] The terminals, network devices, computer storage media, computer program products, and chips provided in the above-mentioned embodiments of the present application are all used to execute the methods provided above. Therefore, the beneficial effects that can be achieved can refer to the beneficial effects corresponding to the methods provided above, and will not be repeated here.

[0292] Although the present application is described herein in conjunction with various embodiments, those skilled in the art may understand and implement other variations of the disclosed embodiments by reviewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0293] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A resource determination method, characterized in that: The method comprises: The terminal receives N channel measurement reference signal configuration information; The terminal determines the orthogonal frequency division multiplexing OFDM symbol occupied by the demodulation reference signal DMRS in the first time unit according to the N channel measurement reference signal configuration information; wherein, The channel sounding reference signal configuration information indicates resources occupied by a channel sounding reference signal on a carrier, or indicates resources occupied by a channel sounding reference signal on a serving cell, or indicates resources occupied by a channel sounding reference signal on a partial bandwidth, where the resources occupied by the channel sounding reference signal include time domain resources, and N is a positive integer; The method further comprises: The terminal receives first downlink control information DCI and second DCI, the first DCI is used to schedule a first physical downlink shared channel PDSCH, the second DCI is used to schedule a second PDSCH, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, the second DCI is carried in a second control resource set, and the first control resource set and the second control resource set belong to different control resource set groups; or, The terminal receives first downlink control information DCI and second DCI, the first DCI is used to schedule a first physical downlink shared channel PDSCH of the first time unit, the second DCI is used to schedule a second PDSCH of the first time unit, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, and the second DCI is carried in a second control resource set; The terminal determines, according to the N channel measurement reference signal configuration information, an OFDM symbol occupied by a DMRS in a first time unit, including: The terminal determines, according to the N channel measurement reference signal configuration information, the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit.

2. The resource determination method according to claim 1, characterized in that: The time domain resource is an OFDM symbol, and any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel sounding reference signal indicated by the N channel sounding reference signal configuration information.

3. The resource determination method according to claim 1 or 2, characterized in that: If the OFDM symbol occupied by the channel measurement reference signal indicated by at least one of the N channel measurement reference signal configuration information includes the first OFDM symbol, then the OFDM symbol occupied by the DMRS does not include the first OFDM symbol, and the OFDM symbol occupied by the DMRS includes the second OFDM symbol.

4. The resource determination method according to claim 1 or 2, characterized in that: If the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

5. The resource determination method according to claim 3, characterized in that: The first OFDM symbol and the second OFDM symbol are OFDM symbols other than a starting OFDM symbol of a physical downlink shared channel PDSCH corresponding to the DMRS.

6. The resource determination method according to claim 3, characterized in that: The first time unit is a time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol in the time slot, and the second OFDM symbol is the 13th OFDM symbol in the time slot.

7. The resource determination method according to claim 1 or 2, characterized in that: One or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry downlink control information DCI, and the DCI is used to schedule a physical downlink shared channel PDSCH corresponding to the DMRS; and / or, One or more channel sounding reference signal configuration information among the N channel sounding reference signal configuration information are associated with the code division multiplexing CDM group occupied by the DMRS.

8. The resource determination method according to claim 7, characterized in that: The resources occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information include multiple resource units RE, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information.

9. The resource determination method according to claim 7, characterized in that: The resources occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information include multiple resource units RE, and the positions of the REs occupied by the control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information.

10. A resource determination method, characterized in that: The method comprises: The network device sends N channel measurement reference signal configuration information to the terminal. The channel sounding reference signal configuration information indicates resources occupied by a channel sounding reference signal on a carrier, or indicates resources occupied by a channel sounding reference signal on a serving cell, or indicates resources occupied by a channel sounding reference signal on a partial bandwidth, where the resources occupied by the channel sounding reference signal include time domain resources, and N is a positive integer; The method further comprises: The network device sends first downlink control information DCI and second DCI to the terminal, the first DCI is used to schedule a first physical downlink shared channel PDSCH, the second DCI is used to schedule a second PDSCH, the DMRS of the first PDSCH is a first DMRS, the DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, the second DCI is carried in a second control resource set, and the first control resource set and the second control resource set belong to different control resource set groups; or, The network device sends first downlink control information DCI and second DCI to the terminal, where the first DCI is used to schedule a first physical downlink shared channel PDSCH of a first time unit, and the second DCI is used to schedule a second PDSCH of the first time unit, a DMRS of the first PDSCH is a first DMRS, and a DMRS of the second PDSCH is a second DMRS, the first DCI is carried in a first control resource set, and the second DCI is carried in a second control resource set; The N channel measurement reference signal configuration information is used by the terminal to determine the OFDM symbols occupied by the first DMRS and the OFDM symbols occupied by the second DMRS in the first time unit.

11. The resource determination method according to claim 10, characterized in that: The time domain resource is an OFDM symbol, and any OFDM symbol occupied by the DMRS does not overlap with any OFDM symbol occupied by the channel sounding reference signal indicated by the N channel sounding reference signal configuration information.

12. The resource determination method according to claim 10 or 11, characterized in that: If the OFDM symbol occupied by the channel measurement reference signal indicated by at least one of the N channel measurement reference signal configuration information includes the first OFDM symbol, then the OFDM symbol occupied by the DMRS does not include the first OFDM symbol, and the OFDM symbol occupied by the DMRS includes the second OFDM symbol.

13. The resource determination method according to claim 10, characterized in that: If the OFDM symbols occupied by the channel sounding reference signals indicated by the N channel sounding reference signal configuration information do not include the first OFDM symbol, then the OFDM symbols occupied by the DMRS include the first OFDM symbol, and the OFDM symbols occupied by the DMRS do not include the second OFDM symbol.

14. The resource determination method according to claim 12, characterized in that: The first OFDM symbol and the second OFDM symbol are OFDM symbols other than a starting OFDM symbol of a physical downlink shared channel PDSCH corresponding to the DMRS.

15. The resource determination method according to claim 12, characterized in that: The first time unit is a time slot where the PDSCH corresponding to the DMRS is located, the first OFDM symbol is the 12th OFDM symbol in the time slot, and the second OFDM symbol is the 13th OFDM symbol in the time slot.

16. The resource determination method according to claim 10, 11 or 13, characterized in that: One or more channel measurement reference signal configuration information among the N channel measurement reference signal configuration information is associated with a control resource set, the control resource set is used to carry downlink control information DCI, and the DCI is used to schedule a physical downlink shared channel PDSCH corresponding to the DMRS; and / or, One or more channel sounding reference signal configuration information among the N channel sounding reference signal configuration information are associated with the code division multiplexing CDM group occupied by the DMRS.

17. The resource determination method according to claim 16, characterized in that: The resources occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information include multiple resource units RE, and the PDSCH corresponding to the DMRS is not mapped on the REs occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information.

18. The resource determination method according to claim 16, characterized in that: The resources occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information include multiple resource units RE, and the positions of the REs occupied by the control resource set do not overlap with the positions of the REs occupied by the channel measurement reference signals indicated by the one or more channel measurement reference signal configuration information.

19. A communication device, characterized in that: The communication device comprises a unit for executing each step involved in any one of claims 1 to 9.

20. A communication device, characterized in that: The communication device comprises a unit for executing each step involved in any one of claims 10 to 18.

21. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 9.

22. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions, and when the instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 10 to 18.

23. A chip, characterized in that: The method comprises a processor, and when the processor executes instructions, the processor executes the method according to any one of claims 1 to 9, or the processor executes the method according to any one of claims 10 to 18.

24. A computer program product, characterized in that When the computer program product is executed on a computer, the computer is enabled to execute the method according to any one of claims 1 to 9 or the method according to any one of claims 10 to 18.

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