CN110855410A

CN110855410A - Method for determining demodulation reference signal DMRS port and related product

Info

Publication number: CN110855410A
Application number: CN201911083711.9A
Authority: CN
Inventors: 王钰华; 王化磊
Original assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Current assignee: Spreadtrum Semiconductor Nanjing Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-02-28
Anticipated expiration: 2039-11-07
Also published as: CN110855410B

Abstract

The embodiment of the invention discloses a method for determining a demodulation reference signal DMRS port and a related product, comprising the following steps: receiving a high-level preset parameter set sent by at least one TRP in a plurality of transmitting and receiving points TRP; determining DMRS ports associated when the plurality of TRPs transmit PDSCH data according to at least one high-level preset parameter set, wherein the DMRS ports and Code Division Multiplexing (CDM) groups are in one-to-one correspondence; and receiving PDSCH data transmitted from the corresponding TRP at each DMRS port. The embodiment of the invention effectively avoids that DMRS ports used by each TRP transmission are from the same Code Division Multiplexing (CDM) group, improves the utilization rate of downlink information to frequency domain resources and reduces TRP transmission interference.

Description

Method for determining demodulation reference signal DMRS port and related product

Technical Field

The application relates to the technical field of electronic equipment, in particular to a method for determining a demodulation reference signal DMRS port and a related product.

Background

Currently, in a New Radio (NR) of the fifth Generation mobile communication technology (5th-Generation, 5G), when a Downlink Control Information (DCI) is in a DCI1_0 format, the demodulation reference signal (DMRS) port in the default Physical Downlink Shared Channel (PDSCH) is port 1000, in the scenario of multi-Transmission and reception Point (multi-TRP) Transmission, if still using the approach in the standard Rel-15 version, that is, the ports of the multiple DCI indicating the default DMRSs for scheduling are all ports 1000, and the DMRSs in the PDSCHs sent by different TRPs are all in the same Code Division Multiplexing (CDM) group, that is, multiple network devices all send data to the terminal through the ports 1000, which will cause downlink information to equally divide frequency domain resources, resulting in transmission interference.

Disclosure of Invention

The embodiment of the invention provides a method for determining a demodulation reference signal DMRS port and a related product, aiming at improving the utilization rate of frequency domain resources and reducing the transmission interference of network equipment.

In a first aspect, an embodiment of the present invention provides a method for determining a DMRS port for a demodulation reference signal, where the method is applied to a terminal device, and the method includes:

receiving a high-level preset parameter set sent by at least one TRP in a plurality of transmitting and receiving points TRP;

determining DMRS ports associated when the plurality of TRPs transmit PDSCH data according to at least one high-level preset parameter set, wherein the DMRS ports and Code Division Multiplexing (CDM) groups are in one-to-one correspondence;

and receiving PDSCH data transmitted from the corresponding TRP at each DMRS port.

In a second aspect, an embodiment of the present invention provides a method for determining a demodulation reference signal DMRS port, which is applied to a network device, where the network device includes a first transmission and reception point TRP, and the method includes:

sending a high-level preset parameter set to the terminal equipment;

determining DMRS ports associated when transmitting Physical Downlink Shared Channel (PDSCH) data according to the high-level parameter set, wherein the DMRS ports and Code Division Multiplexing (CDM) groups are in one-to-one correspondence;

and transmitting the PDSCH data to the terminal equipment through the DMRS port.

In a third aspect, an embodiment of the present invention provides a terminal device, which includes a processing unit and a communication unit, wherein,

the processing unit is used for receiving a high-level preset parameter set sent by at least one TRP in a plurality of transmission and reception points TRP through the communication unit; and the DMRS ports are used for determining the associated DMRS ports when the plurality of TRPs send the PDSCH data according to at least one high-level preset parameter set, wherein the DMRS ports and the code division multiplexing groups CDMgroup are in one-to-one correspondence; and for receiving PDSCH data transmitted from the corresponding TRP at each of the DMRS ports by the communication unit.

In a fourth aspect, an embodiment of the present invention provides a network device, the network device including a first transmission and reception point TRP, the network device including a processing unit and a communication unit, wherein,

the processing unit is used for sending a high-level preset parameter set to the terminal equipment through the communication unit; and the DMRS ports are used for determining associated DMRS ports when transmitting the PDSCH data according to the high-level parameter set, wherein the DMRS ports and code division multiplexing groups (CDM groups) are in one-to-one correspondence; and transmitting the PDSCH data to the terminal device at the DMRS port by the communication unit.

In a fifth aspect, an embodiment of the present invention provides a terminal device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing steps in any method of the first aspect of the embodiment of the present invention.

In a sixth aspect, an embodiment of the present invention provides a network device, including a processor, a memory, a communication interface, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for executing the steps in any of the methods of the second aspect of the present invention.

In a seventh aspect, an embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps described in any one of the methods in the first aspect of the embodiment of the present invention.

In an eighth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, and the computer program makes a computer perform some or all of the steps described in any one of the methods according to the second aspect.

In a ninth aspect, the present invention provides a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present invention. The computer program product may be a software installation package.

In a tenth aspect, the present invention provides a computer program product, wherein the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in any one of the methods of the second aspect of the present invention. The computer program product may be a software installation package.

It can be seen that, in the embodiment of the present invention, a terminal device receives a high-level preset parameter set sent by at least one TRP in multiple transmission and reception points TRP, and determines, according to the at least one high-level preset parameter set, DMRS ports associated when the multiple TRPs send PDSCH data of a physical downlink shared channel, where the DMRS ports and Code Division Multiplexing (CDM) groups are in a one-to-one correspondence relationship, and then receives, at each of the DMRS ports, PDSCH data sent by a corresponding TRP. Therefore, under the condition of multiple TRPs, different TRPs can be associated with different DMRS ports from different CDM groups to send downlink information, the condition that the DMRS ports used by each TRP transmission are from the same CDM group is effectively avoided, the utilization rate of frequency domain resources by the downlink information is improved, and the network transmission interference is reduced.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a network architecture diagram of a communication system according to an embodiment of the present invention;

fig. 2A is a schematic flowchart of a method for determining a demodulation reference signal DMRS port according to an embodiment of the present invention;

fig. 2B is a schematic diagram of parameter configuration for sending DCI by a network device according to an embodiment of the present invention;

fig. 3A is a schematic flowchart of another method for determining a DMRS port for demodulation reference signals according to an embodiment of the present invention;

fig. 3B is a schematic flowchart of a method for determining a DMRS port for demodulation reference signals according to an embodiment of the present invention;

fig. 4 is a schematic diagram illustrating a parameter configuration for sending DCI by another network device according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a network device according to an embodiment of the present invention;

fig. 7 is a block diagram illustrating functional units of a terminal device according to an embodiment of the present invention;

fig. 8 is a block diagram illustrating functional units of a network device according to an embodiment of the present invention.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global System for Mobile communications (GSM) System, a Code Division Multiple Access (CDMA) System, a Wideband Code Division Multiple Access (WCDMA) System, a General Packet Radio Service (GPRS), a Long term evolution (Long term evolution, LTE) System, a LTE Frequency Division Duplex (FDD) System, a LTE Time Division Duplex (TDD) System, a Long term evolution (Advanced) evolution (LTE-A) System, a New wireless (New Radio, NR) System, an evolution System of an NR System, a non-licensed band (LTE-based) to non-licensed Access spectrum (UMTS-NR) System, a non-licensed uplink (UMTS-NR) System, a Universal Mobile Radio Access (UMTS-NR) System, a Universal Mobile Access (GPRS) System, WiMAX) communication system, Wireless Local Area Network (WLAN), Wireless Fidelity (WiFi), next generation communication system, or other communication system.

Generally, the conventional Communication system supports a limited number of connections and is easy to implement, however, with the development of Communication technology, the mobile Communication system will support not only conventional Communication but also, for example, Device-to-Device (D2D) Communication, Machine-to-Machine (M2M) Communication, Machine Type Communication (MTC), and Vehicle-to-Vehicle (V2V) Communication, and the embodiments of the present application can also be applied to these Communication systems.

Illustratively, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include a terminal device 110, and the terminal device 110 may be a device that communicates with a plurality of network devices 120 (or referred to as communication terminals, terminals). Network device 120 may provide communication coverage for a particular geographic area and terminal device 110 may communicate with a plurality of network devices that cover it. Optionally, the Network device 120 may be a base Station (BTS) in a GSM system or a CDMA system, a base Station (NodeB, NB) in a WCDMA system, an evolved Node B (eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN), or a Network device in a Mobile switching center, a relay Station, an Access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a Network-side device in a 5G Network, or a Network device in a Public Land Mobile Network (PLMN) for future evolution, or the like.

The communication system 100 further comprises at least one terminal device 120 located within the coverage area of the network device 110. As used herein, "terminal equipment" includes, but is not limited to, connections via wireline, such as Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connection; and/or another data connection/network; and/or via a Wireless interface, e.g., to a cellular Network, a Wireless Local Area Network (WLAN), a digital television Network such as a DVB-H Network, a satellite Network, an AM-FM broadcast transmitter; and/or means of another terminal device arranged to receive/transmit communication signals; and/or Internet of Things (IoT) devices. A terminal device arranged to communicate over a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal", or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and conventional laptop and/or palmtop receivers or other electronic devices that include a radiotelephone transceiver. Terminal Equipment may refer to an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, User terminal, wireless communication device, User agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device having Wireless communication capabilities, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

Optionally, network devices 120 may interact with each other.

Alternatively, the 5G system or the 5G network may also be referred to as a New Radio (NR) system or an NR network.

Fig. 1 exemplarily shows one terminal device and two network devices, and optionally, the communication system 100 may include multiple terminal devices and multiple terminal devices may be located in the coverage of the same network device, which is not limited in this embodiment of the present application.

Optionally, the communication system 100 may further include other network entities such as a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include a terminal device 110 and a network device 120 having a communication function, and the terminal device 110 and the network device 120 may be the specific devices described above, which are not described herein again; the communication device may also include other devices in the communication system 100, such as other network entities, for example, a network controller, a mobility management entity, and the like, which is not limited in this embodiment.

Referring to fig. 2A, fig. 2A is a flowchart of a method for determining a demodulation reference signal (DMRS) port, which is applied to a terminal device in the communication system according to an embodiment of the present invention, where the method includes some or all of the following:

in step 201, the terminal device receives a high-level preset parameter set sent by at least one TRP from a plurality of Transmission and reception points (multi-TRP).

The terminal device is in a multi-TRP (multi-TRP) transmission scenario, the multi-TRP transmission scenario is divided into two transmission types, which are multi-Downlink control signaling (multi-DCI) and single-DCI, specifically, the multi-DCI is a DCI that each TRP issues a respective DCI, and each DCI is not associated with another DCI; when there are two TRPs, the single-DCI issues the DCI through one TRP after interactive decision is made between the two or more TRPs, and the DCI contains all contents to be issued by the two TRPs.

Wherein, under the multi-DCI transmission type, the at least one TRP is a plurality of TRPs, and under the single-DCI transmission type, the at least one TRP is the decided one TRP.

And all the downlink control signaling DCI are in a format of DCI1_ 0.

In one possible example, the high layer preset parameter set includes at least one of: a high-level index HigherLayerIndexPerCORESET of each control resource set, a physical downlink shared channel scrambling DataScramblingIdentityPDSCH and a control resource set ControlResourceSetId.

Wherein, the value of higherlayerinderxpercoeset may be 0 or 1, the datasscrimblingidentitydpdsch may be the first datasscrimblingidentitydpdsch or the second datasscrimblingidentitydpdsch, and the value of controlresourcesetidd may be 0, 1, 2, 3, 4.

Step 202, the terminal device determines, according to at least one preset parameter set of the upper layer, DMRS ports associated when the multiple TRPs transmit Physical Downlink Shared Channel (PDSCH) data, where the DMRS ports correspond to Code Division Multiplexing (CDM) groups in a one-to-one manner.

In one possible example, the DMRS ports include port 1000 and a preset default port X, where X is 1002 or 1003.

In a specific implementation, the terminal device determines, according to at least one higher-layer preset parameter set, DMRS ports associated when multiple TRPs transmit PDSCH data, may determine, according to higherlayerrindindexcoreset in the at least one higher-layer preset parameter set, DMRS ports associated when corresponding TRPs transmit PDSCH data, or the like, according to higherlayerrindexcorrectricorrestexisetp and datascribrunndidentitypdsch in the at least one higher-layer preset parameter set, and the like, where no unique limitation is made herein.

Different DMRS ports correspond to different CDM groups, for example, DMRS port 1000 corresponds to CDMgroup0, and DMRS port X corresponds to CDM group 1.

Step 203, the terminal device receives the PDSCH data sent from the corresponding TRP on each DMRS port.

In one possible example, if the plurality of TRPs includes a first TRP and a second TRP, where the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first higherlayerrindexcorroest, the second higher layer preset parameter set includes a second higherlayerrindindexcorroest, and the transmission type is multi-DCI transmission, determining, according to at least one of the higher layer preset parameter sets, a DMRS port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel, includes:

when the first high layer index PerCORESET is 0, determining that the associated DMRS port when the first TRP transmits PDSCH data is port 1000, and determining that the associated DMRS port when the second TRP transmits PDSCH data is port X; or the like, or, alternatively,

when the first high layer index PerCORESET is 0, determining that the associated DMRS port when the first TRP sends PDSCH data is the port X, and determining that the associated DMRS port when the second TRP sends PDSCH data is the port 1000.

The first HigherlayerIndexPerCORESET is the HigherlayerIndexPerCORESET corresponding to the DCI sent by the first TRP in the high-layer preset parameter set sent by the first TRP, and the second HigherlayerIndexPerCORESET is the HigherlayerIndexPerCORESET corresponding to the DCI sent by the second TRP in the high-layer preset parameter set sent by the second TRP.

Wherein, when the first higherlayerrindexcoreset is 0, the second higherlayerrindexcoreset is 1, and when the first higherlayerrindexcoreset is 1, the second higherlayerrindexcoreset is 0, that is, when the first higherlayerrindexcoreset is 0, the DMRS port associated with the PDSCH transmitted by the first TRP is determined to be port 1000, at this time, the second higherlayerrindexcoreset is 1, that is, the DMRS port associated with the PDSCH transmitted by the second TRP is port X, or when the first higherlayerrindexcoreset is 1, the DMRS port associated with the PDSCH transmitted by the first TRP is determined to be port 1000, at this time, the DMRS port associated with the second TRP is 0, that is, the DMRS port associated with the PDSCH transmitted by the second TRP is port X.

In this example, the terminal device determines the respective DMRS ports according to the first higherlayerrindexcorreset and the second higherlayerrindexcoreset in the high-level preset parameter sets corresponding to the two TRPs, and thus, the DMRS ports are determined by taking values of the existing parameters, instead of increasing new parameters, which is beneficial to improving the utilization rate of the existing data and the convenience of DMRS port determination.

In one possible example, if the plurality of TRPs includes a first TRP and a second TRP, where the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first reference datascriptramblindindidentitypdsch, the second higher layer preset parameter set includes a second reference datascriptramblindidentitypdsch, and when the transmission type is multi-DCI transmission, the determining, according to at least one of the higher layer preset parameter sets, a DMRS port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel includes:

when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is Port 1000, and determining that the DMRS port associated when the second TRP transmits PDSCH data is Port X; or the like, or, alternatively,

when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is Port X, and determining that the DMRS port associated when the second TRP transmits PDSCH data is Port 1000.

Two parameters are configured for Radio Resource Control (RRC), which are respectively a first DataScramblingIdentityPDSCH and a second DataScramblingIdentityPDSCH, where the first DataScramblingIdentityPDSCH may be, for example, a DataScramblingIdentityPDSCH or a DataScramblingIdentityPDSCH1, and the second DataScramblingIdentityPDSCH may be, for example, an additionalldatascramblingidentitypdsch or a DataScramblingIdentityPDSCH2, which is not limited herein.

Specifically, when the first reference datascribramblngldentitypdsch is the first datascribramblinglingidentitypdsch, the second reference datascribrambldentitypdsch is the second datascribrambldingidentitypdsch, when the first reference datascribrambldingidentitypdsch is the second datascribrambldentitypdsch, the second reference datascribrambldentitypdsch is the first datascribrambldingidentitypdsch, that is, when the first reference datascribrambldingidentitypdsch is the first datascribrambltinpdsch, the pdschassociated port transmitted by the first PDSCH is determined to be port 1000, when the first reference datascribrambldingidetypdsch is the first datascribrambltinpdsch, the second reference datascribrambltindettinpdsch is the second datascribramblingtingpdsch, that the second datascribtindeltinpdsch is transmitted by the first datascribrambldsdsch, and when the second reference datascribrambltindsdsch associated port transmitted by the second datascribrambldsdsch is port 1000, the second reference datascribrambltindsdsch associated port transmitted by the second datascribrambltindsdsch is determined to be port 1000, and when the second reference datascribrambltindsdsch associated port transmitted by the first datascribramblrdpdsch is the second datascribrambltindstrtrtrtrtrbrabltindsschs.

In a possible example, if the plurality of TRPs include a first TRP and a second TRP, where the first TRP corresponds to a first higher-layer preset parameter set, the second TRP corresponds to a second higher-layer preset parameter set, the first higher-layer preset parameter set includes a first ControlResourceSetId, the second higher-layer preset parameter set includes a second ControlResourceSetId, and the transmission type is multi-DCI transmission, the determining, according to at least one of the higher-layer preset parameter sets, a DMRS port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel includes:

when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends PDSCH data is port 1000 and determining that the associated DMRS port when the second TRP sends PDSCH data is port X; or the like, or, alternatively,

when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends PDSCH data is the port X, and determining that the associated DMRS port when the second TRP sends PDSCH data is the port 1000.

The first controlResourceSetId is a controlResourceSetId corresponding to DCI sent by the first TRP in the high-layer preset parameter set sent by the first TRP, and the second controlResourceSetId is a controlResourceSetId corresponding to DCI sent by the second TRP in the high-layer preset parameter set sent by the second TRP.

For example, when the first ControlResourceSetId is 2 and the second first ControlResourceSetId is 4, the first ControlResourceSetId is smaller than the second ControlResourceSetId, and at this time, the DMRS port associated with the PDSCH transmitted by the first TRP is determined to be port 1000, and the DMRS port associated with the PDSCH transmitted by the second TRP is determined to be port X.

Also for example, when the first ControlResourceSetId is 2 and the second first ControlResourceSetId is 4, the first ControlResourceSetId is smaller than the second ControlResourceSetId, and at this time, the DMRS port associated with the PDSCH transmitted by the first TRP is determined to be port X, and the DMRS port associated with the PDSCH transmitted by the second TRP is determined to be port 1000.

As another example, when the first controlresosetsetsid is 4 and the second first controlresosetsetsid is 2, the second controlresosetsid is smaller than the first controlresosetsid, and at this time, the DMRS port associated with the PDSCH transmitted by the first TRP is determined to be port 1000, and the DMRS port associated with the PDSCH transmitted by the second TRP is determined to be port X.

In one possible example, if the plurality of TRPs includes two TRPs, the transmission type is single-DCI transmission, and the upper layer preset parameter set includes a third higherlayerrindexpercoreset, the determining, according to at least one of the upper layer preset parameter sets, a DMRS port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel includes:

when the third high bayer layerindexpercoeset is 0, determining the DMRS port associated with a first one of the two TPRs transmitting DCI transmitting PDSCH data as port 1000, and determining the DMRS port associated with a second one of the two TPRs transmitting PDSCH data other than the first TPR as port X; or the like, or, alternatively,

when the third higherlayerrindexpercoeset is 0, determining that the DMRS port associated with a first one of the two TPRs that transmits DCI when transmitting PDSCH data is port X, and determining that the DMRS port associated with a second one of the two TPRs that transmits PDSCH data other than the first TPR is port 1000.

Wherein the third higherlayerrindexpercoest is the higherlayerrindexpercoest corresponding to the DCI.

When the plurality of TRPs include two TRPs and the transmission type is single-DCI transmission, the two TRPs may interactively decide that one TRP transmits DCI, and the TRP corresponds to a high-level preset parameter set including a third higherlayerrindexpercoreset, where the third higherlayerrindexpercoreset may be 0 or 1.

Specifically, the determining, according to the at least one high-level preset parameter set, a DMRS port associated with the corresponding TRP when transmitting PDSCH data further includes: when the third higherlayerrindexpercoreset is 1, determining the DMRS port associated with the TPR that transmits DCI in the two TPRs as port 1000; or, when the third higherlayerrindexpercoeset is 1, the DMRS port associated with the TPR that transmits DCI in the two TPRs is determined to be port X, and meanwhile, in the case that there are only two ports, i.e., port 1000 and port X, the DMRS port associated with the TPR that transmits DCI is determined, that is, the port associated with the other of the two TPRs may be determined.

It can be seen that, in the above multiple examples, the terminal device may determine the DMRS ports corresponding to the two TRPs according to different values of various existing parameters, which is beneficial to improving the diversity determined by the DMRS ports, and is beneficial to improving the utilization rate of existing data and the convenience determined by the DMRS ports, without adding new parameters.

The following describes an embodiment of the present invention with reference to a specific application scenario.

As shown in fig. 2B, the communication system includes two TRPs, which are TRP1 and TPR2, respectively, and when the transmission type is multi-DCI transmission, TRP1 sends DCI1 to the terminal device, TRP2 sends DCI2 to the terminal device, the communication system corresponds to DMRS port 1000 when high layer identifier complete is set to 1, DMRS port X when high layer identifier complete is set to 0, DMRS port X when data scanning identifier pdsch1 corresponds to DMRS port X, DMRS port 1000 when data scanning identifier pdsch is data scanning identifier pdsch2, DMRS port X corresponding to the smaller control identifier of the two esresource identifiers, the communication system corresponding to the larger DMRS port identifier pdschr port 1000 when data scanning identifier pdsch is data scanning identifier pdsch2, and DMRS port id corresponding to the smaller control identifier DMRS of the two esresource identifiers is configured to DMRS port X when DMRS identifier csi is set to RRC identifier pdr 6342, and DMRS identifier csi parameter corresponding to csi identifier csi parameter is set to RRC identifier csi rs port r 6342, when DMRS identifier rs identifier csi parameter corresponding to csi identifier csi layer csi rs port X corresponding to csi identifier pdsch is set to rdc 6342, DMRS identifier rs 6342, and DCI csi parameter set to indicate that the following three types are set:

1. the determination is performed through the parameter HigherLayerIndexPerCORESET, if the higherlayerrindexcoreset corresponding to the TRP1 is 1, then the DMRS port corresponding to the TRP1 is 0, and the higherlayerrindexcoreset corresponding to the TRP2 is 0, then the DMRS port corresponding to the TRP2 is X, that is, the DMRS port X corresponding to the PDSCH data sent next from the TRP2 is 1000, and the DMRS port corresponding to the PDSCH data sent next from the TRP1 is 1000.

2. The determination is performed by using the parameter datascramblingidentypdsch, then the datascramblingidentypdsch corresponding to the TRP1 is datascramblingidentypdsch 2, then the DMRS port corresponding to the TRP1 is 1000, the datascramblingidentypdsch corresponding to the TRP2 is datascramblingidentypdsch 1, then the DMRS port corresponding to the TRP2 is X, that is, the DMRS port X corresponding to the next PDSCH data sent from the TRP2 is 1000, and the DMRS port corresponding to the next PDSCH data sent from the TRP1 is 1000.

3. If the determination is made through the parameter ControlResourceSetId, if ControlResourceSetId 3 corresponding to TRP1 is greater than ControlResourceSetId 2 corresponding to TRP2, then the DMRS port corresponding to TRP1 is 1000, and the DMRS port corresponding to TRP2 is X, that is, the DMRS port X corresponding to the next PDSCH data sent from TRP2 is 1000, and the DMTS port corresponding to the PDSCH data sent from TRP1 is 1000.

Referring to fig. 3A, fig. 3A is a flowchart of another method for determining a DMRS port according to an embodiment of the present invention, where the method is applied to a network device in the communication system in fig. 1, where the network device includes a first transmission and reception point TRP, and the method includes some or all of the following:

step 301, a first TRP sends a high-level preset parameter set to a terminal device;

when the transmission type is multi-DCI transmission, the first TRP is one of a plurality of TRPs for sending DCI to the terminal equipment, and when the transmission type is single-DCI transmission, the first TRP is the TRP for sending DCI to the terminal equipment through one of the plurality of TRPs interactively decided.

Step 302, the first TRP determines DMRS ports associated when transmitting PDSCH data of a physical downlink shared channel according to the set of high layer parameters, wherein the DMRS ports and CDM groups are in a one-to-one correspondence relationship;

In a specific implementation, the implementation manner of determining, by the network device according to the higher-layer preset parameter set, the DMRS port associated when the corresponding TRP transmits the PDSCH data may be determined according to a higherlayerrindindexcoreset in the higher-layer preset parameter set, or the DMRS port associated when the corresponding TRP transmits the PDSCH data may be determined according to a datascramblingidentyipdsch in the higher-layer preset parameter set, or the DMRS port associated when the corresponding TRP transmits the PDSCH data may be determined according to a ControlResourceSetId in the higher-layer preset parameter set, or the DMRS port associated when the corresponding TRP transmits the PDSCH data may be determined according to a higherlayerrindexpercoreset and a datascramblingidentyipdsch in the higher-layer preset parameter set, and the like, and the only limitation is not made herein.

Step 303, the first TRP transmits the PDSCH data to the terminal device through the DMRS port.

It can be seen that, in the embodiment of the present invention, a first TRP sends a high-level preset parameter set to a terminal device, and determines, according to the high-level parameter set, a DMRS port associated when PDSCH data of a physical downlink shared channel is sent, where the DMRS port and a code division multiplexing group CDM group are in a one-to-one correspondence relationship, and then sends the PDSCH data to the terminal device through the DMRS port. Therefore, the first TRP can determine the associated DMRS port when the PDSCH data is sent according to the corresponding relation between the high-order preset parameter set and the DMRS port, effectively avoids that the DMRS ports used by the PDSCH data and other TRPs are from the same CDM group when the PDSCH data is sent to the terminal equipment, improves the utilization rate of downlink information on frequency domain resources, and reduces network transmission interference.

In one possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first higherlayerrindexpercoeset, and the determining, according to the higher-layer parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel includes:

when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is port 1000; or the like, or, alternatively,

when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X.

In one possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first reference DataScramblingIdentityPDSCH, and determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel includes:

when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is a port 1000; or the like, or, alternatively,

when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X.

In one possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first ControlResourceSetId, the determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel includes:

when the first controlResourceSetId is smaller than a second controlResourceSetId, determining that the associated DMRS port is a port 1000 when the first TRP sends PDSCH data, wherein the second controlResourceSetId corresponds to a second high-level preset parameter set, and the second high-level preset parameter set is a high-level preset parameter set sent by a second TRP except the first TRP to the terminal device; or the like, or, alternatively,

when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port is the port X when the first TRP sends PDSCH data.

The first TRP can determine a value of a controlResourceSetId corresponding to a high-level preset parameter set sent by the second TRP to the terminal device through interaction with the second TRP.

In one possible example, if the transmission type corresponding to the first TRP is single-DCI transmission, and the first TPR is a TPR for transmitting DCI to the terminal device in the single-DCI transmission type, the first TRP corresponds to a first high-level preset parameter set, the first high-level preset parameter set includes a third high-level layer indexpercoeset, and the determining, according to the high-level parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel includes:

when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port 1000; or the like, or, alternatively,

when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port X.

It can be seen that, in the above multiple examples, the network device may determine, according to different values of various existing parameters, the DMRS port corresponding to the PDSCH data sent to the terminal device, which is beneficial to improving the diversity of DMRS port determination, and moreover, it is not necessary to add new parameters, which is beneficial to improving the utilization rate of existing data and the convenience of DMRS port determination.

As shown in fig. 3B, when the communication system includes two TRPs, namely TRP1 and TPR2, and the transmission type is single-DCI transmission, TRP1 and TRP2 determine through interaction that a TRP1 transmits DCI to the terminal device, where the DCI includes contents of the DCI that TRP1 and TRP2 need to be issued, the DCI corresponds to DMRS port 1000 when higherlayer associated parameter set equal to 1, and corresponds to DMRS port X when higherlayer associated parameter set equal to 0, DMRS port X when datascribrlingidentitydpdsch is datascribrlingidentitydpdsch 1, DMRS port 1000 when datascribrlingidentitydpdsch is 2, and DMRS port X corresponding to smaller DMRS port control group associated with smaller of two trprolodetid is larger than DMRS port 5, and when DMRS port id corresponds to DMRS port 58identityd 483, the DCI may be transmitted in the following manner when DMRS transmitted by TRP1 and TRP2 is identical to DMRS port 5, and DMRS port id is determined by: the parameter higherlayerrindexcorreset is determined, and then the higherlayerrindexcorreset corresponding to the TRP1 is 1, and then the DMRS port corresponding to the TRP1 is 1000, that is, the DMRS port corresponding to the PDSCH data transmitted from the TRP1 is 1000.

Referring to fig. 4, fig. 4 is a flowchart of another method for determining a DMRS port for demodulation reference signals, which is applied to the communication system in fig. 1, where the method includes some or all of the following steps:

step 401, the first TRP sends a high-level preset parameter set to the terminal device.

Step 402, the terminal device receives a high-level preset parameter set sent by the first TRP, where the first TRP is one of the plurality of TRPs received by the terminal device and sent by the high-level preset parameter set.

And step 403, the first TRP determines DMRS ports associated when transmitting PDSCH data according to the high-level parameter set, wherein the DMRS ports and Code Division Multiplexing (CDM) groups are in a one-to-one correspondence relationship.

And step 404, the terminal equipment determines the associated DMRS ports when the plurality of TRPs transmit the PDSCH data according to the high-level preset parameter set.

Wherein the plurality of TRPs may be two.

Step 405, the first TRP transmits the PDSCH data to the terminal device through the DMRS port.

Step 406, the terminal device receives PDSCH data sent by the first TRP at the DMRS port corresponding to the first TRP.

In accordance with the embodiment shown in fig. 2A, please refer to fig. 5, fig. 5 is a schematic structural diagram of a terminal device 500 according to an embodiment of the present invention, as shown in the figure, the terminal device 500 includes a processor 510, a memory 520, a communication interface 530, and one or more programs 521, where the one or more programs 521 are stored in the memory 520 and configured to be executed by the processor 510, and the one or more programs 521 include instructions for performing the following steps;

In one possible example, if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer default parameter set, the second TRP corresponds to a second higher layer default parameter set, the first higher layer default parameter set includes a first higherlayerrindexcorroest, the second higher layer default parameter set includes a second higherlayerrindexcorroest, and the transmission type is multi-DCI transmission, in terms of the DMRS ports associated when the plurality of TRPs are determined to transmit PDSCH data of a physical downlink shared channel, the instructions in the one or more programs 521 are specifically configured to perform the following operations: when the first high layer index PerCORESET is 0, determining that the associated DMRS port when the first TRP transmits PDSCH data is port 1000, and determining that the associated DMRS port when the second TRP transmits PDSCH data is port X; or when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X, and determining that the DMRS port associated when the second TRP transmits PDSCH data is the port 1000.

In a possible example, if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first reference datascriptramblindindidentitypdsch, the second higher layer preset parameter set includes a second reference datascriptramblindidentitypdsch, and when the transmission type is multi-DCI transmission, in terms of determining DMRS ports associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel, according to at least one of the higher layer preset parameter sets, the instructions in the one or more programs 521 are specifically configured to perform the following operations: when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is Port 1000, and determining that the DMRS port associated when the second TRP transmits PDSCH data is Port X; or, when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X, and determining that the DMRS port associated when the second TRP transmits PDSCH data is port 1000.

In a possible example, if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first ControlResourceSetId, the second higher layer preset parameter set includes a second ControlResourceSetId, and the transmission type is multi-DCI transmission, in terms of the DMRS port associated when the plurality of TRPs are determined to transmit PDSCH data of a physical downlink shared channel according to at least one of the higher layer preset parameter sets, the instructions in the one or more programs 521 are specifically configured to perform the following operations: when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends PDSCH data is port 1000 and determining that the associated DMRS port when the second TRP sends PDSCH data is port X; or when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends the PDSCH data is the port X, and determining that the associated DMRS port when the second TRP sends the PDSCH data is the port 1000.

In a possible example, if the plurality of TRPs includes two TRPs, the transmission type is single-DCI transmission, and the upper layer preset parameter set includes a third higherlayerrindexpercoeset, in the aspect of the DMRS port associated when the plurality of TRPs transmit PDSCH data of the physical downlink shared channel is determined according to at least one of the upper layer preset parameter sets, the instructions in the one or more programs 521 are specifically configured to perform the following operations: when the third high bayer layerindexpercoeset is 0, determining the DMRS port associated with a first one of the two TPRs transmitting DCI transmitting PDSCH data as port 1000, and determining the DMRS port associated with a second one of the two TPRs transmitting PDSCH data other than the first TPR as port X; or, when the third higherlayerrindexpercoeset is 0, determining that the DMRS port associated with a first one of the two TPRs that transmits DCI when PDSCH data is transmitted is port X, and determining that the DMRS port associated with a second one of the two TPRs that transmits PDSCH data other than the first TPR is port 1000.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a network device 600 according to an embodiment of the present invention, where the network device 600 includes a first transmission and reception point TRP, and as shown, the network device 600 includes a processor 610, a memory 620, a communication interface 630, and one or more programs 621, where the one or more programs 621 are stored in the memory 620 and configured to be executed by the processor 610, and the one or more programs 621 include instructions for performing the following steps;

sending a high-level preset parameter set to the terminal equipment;

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first higherlayerrindexpercoeset, in the aspect of the DMRS port associated when determining to transmit PDSCH data of a physical downlink shared channel according to the higher-layer parameter set, the instructions in the one or more programs 621 are specifically configured to perform the following operations: when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is port 1000; or when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X.

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first reference DataScramblingIdentityPDSCH, in the aspect of determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel, the instructions in the one or more programs 621 are specifically configured to perform the following operations: when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is a port 1000; or, when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X.

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first ControlResourceSetId, in the aspect of determining a DMRS port associated when sending PDSCH data of a physical downlink shared channel according to the higher-layer parameter set, the instructions in the one or more programs 621 are specifically configured to perform the following operations: when the first controlResourceSetId is smaller than a second controlResourceSetId, determining that the associated DMRS port is a port 1000 when the first TRP sends PDSCH data, wherein the second controlResourceSetId corresponds to a second high-level preset parameter set, and the second high-level preset parameter set is a high-level preset parameter set sent by a second TRP except the first TRP to the terminal device; or when the first ControlResourceSetId is smaller than the second ControlResourceSetId, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X.

In a possible example, if the transmission type corresponding to the first TRP is single-DCI transmission, and the first TPR is a TPR for transmitting DCI to the terminal device in the single-DCI transmission type, where the first TRP corresponds to a first high-level preset parameter set, the first high-level preset parameter set includes a third high-level layer indexpercoeset, and in the aspect of determining, according to the high-level parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel, the instruction in the one or more programs 621 is specifically configured to perform the following operations: when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port 1000; or when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port X.

The above-mentioned embodiments of the present invention have been introduced mainly from the perspective of interaction between network elements. It is understood that the terminal device and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the functions. Those of skill in the art will readily appreciate that the present invention can be implemented in hardware or a combination of hardware and computer software, with the exemplary elements and algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

The terminal device and the network device may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the unit in the embodiment of the present invention is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In case of integrated units, fig. 7 shows a block diagram of a possible functional unit composition of the terminal device involved in the above embodiments. The terminal device 700 includes: a processing unit 702 and a communication unit 703. Processing unit 702 is configured to control and manage actions of the terminal device, e.g., processing unit 702 is configured to support the terminal device to perform steps 201-203 in fig. 2A and/or other processes for the techniques described herein. The communication unit 703 is used to support communication between the terminal device and other devices, for example, communication with a network device shown in fig. 6. The terminal device may further include a storage unit 701 for storing program codes and data of the terminal device.

The processing Unit 702 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 703 may be a communication interface, a transceiver circuit, or the like, and the storage unit 701 may be a memory.

The processing unit 702 is configured to receive, through the communication unit 703, a higher layer preset parameter set sent by at least one TRP in a plurality of transmission and reception points TRP; and the DMRS ports are used for determining the associated DMRS ports when the plurality of TRPs send the PDSCH data according to at least one high-level preset parameter set, wherein the DMRS ports and the code division multiplexing groups (CDM groups) are in one-to-one correspondence; and for receiving PDSCH data transmitted from the corresponding TRP at each of the DMRS ports through the communication unit 703.

In a possible example, if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first higherlayerrindexcorroest, the second higher layer preset parameter set includes a second higherlayerrindexcorroest, and the transmission type is multi-DCI transmission, in the aspect of the DMRS port associated when the plurality of TRPs are determined to transmit PDSCH data of a physical downlink shared channel according to at least one of the higher layer preset parameter sets, the processing unit 702 is specifically configured to: when the first high layer index PerCORESET is 0, determining that the associated DMRS port when the first TRP transmits PDSCH data is port 1000, and determining that the associated DMRS port when the second TRP transmits PDSCH data is port X; or when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X, and determining that the DMRS port associated when the second TRP transmits PDSCH data is the port 1000.

In a possible example, if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first reference datascriptramblindindidentitypdsch, the second higher layer preset parameter set includes a second reference datascriptramblindidentitypdsch, and when the transmission type is multi-DCI transmission, in terms of the port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel according to at least one of the higher layer preset parameter sets, the DMRS processing unit 702 is specifically configured to: when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is Port 1000, and determining that the DMRS port associated when the second TRP transmits PDSCH data is Port X; or, when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X, and determining that the DMRS port associated when the second TRP transmits PDSCH data is port 1000.

In a possible example, if the plurality of TRPs include a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first ControlResourceSetId, the second higher layer preset parameter set includes a second ControlResourceSetId, and the transmission type is multi-DCI transmission, in the aspect of the DMRS port associated when the plurality of TRPs transmit physical downlink shared channel PDSCH data according to at least one of the higher layer preset parameter sets, the processing unit 702 is specifically configured to: when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends PDSCH data is port 1000 and determining that the associated DMRS port when the second TRP sends PDSCH data is port X; or when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port when the first TRP sends the PDSCH data is the port X, and determining that the associated DMRS port when the second TRP sends the PDSCH data is the port 1000.

In a possible example, if the plurality of TRPs includes two TRPs, the transmission type is single-DCI transmission, and the upper layer preset parameter set includes a third higherlayerrindexpercoeset, in the aspect of the DMRS port associated when the plurality of TRPs transmit PDSCH data of a physical downlink shared channel according to at least one of the upper layer preset parameter sets, the processing unit 702 is specifically configured to: when the third high bayer layerindexpercoeset is 0, determining the DMRS port associated with a first one of the two TPRs transmitting DCI transmitting PDSCH data as port 1000, and determining the DMRS port associated with a second one of the two TPRs transmitting PDSCH data other than the first TPR as port X; or, when the third higherlayerrindexpercoeset is 0, determining that the DMRS port associated with a first one of the two TPRs that transmits DCI when PDSCH data is transmitted is port X, and determining that the DMRS port associated with a second one of the two TPRs that transmits PDSCH data other than the first TPR is port 1000.

When the processing unit 702 is a processor, the communication unit 703 is a communication interface, and the storage unit 701 is a memory, the terminal device according to the embodiment of the present invention may be the terminal device shown in fig. 5.

In case of an integrated unit, fig. 8 shows a block diagram of a possible functional unit composition of the network device involved in the above embodiment, which comprises the first transmission and reception point TRP. The network device 800 includes: a processing unit 802 and a communication unit 803. Processing unit 802 is configured to control and manage actions of the network device, e.g., processing unit 802 is configured to support the network device to perform steps 301-303 of fig. 3A and/or other processes for the techniques described herein. The communication unit 803 is used to support communication between the network device and other devices, for example, the terminal device shown in fig. 5. The network device may also comprise a storage unit 801 for storing program codes and data of the network device.

The processing Unit 802 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 803 may be a communication interface, a transceiver circuit, a radio frequency chip, or the like, and the storage unit 801 may be a memory.

The processing unit 802 is configured to send a high-level preset parameter set to a terminal device through the communication unit 803; and the DMRS ports are used for determining associated DMRS ports when transmitting the PDSCH data according to the high-level parameter set, wherein the DMRS ports and code division multiplexing groups (CDM groups) are in one-to-one correspondence; and for transmitting the PDSCH data to the terminal device on the DMRS port via the communication unit 803.

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first higherlayerrindexpercoeset, in the aspect of determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel, the processing unit 802 is specifically configured to: when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is port 1000; or when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X.

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first reference DataScramblingIdentityPDSCH, in the aspect of determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel, the processing unit 802 is specifically configured to: when the first reference DataScramblingIdentityPDSCH is a first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is a port 1000; or, when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X.

In a possible example, if the transmission type corresponding to the first TRP is multi-DCI transmission, and the first TRP corresponds to a first higher-layer preset parameter set, where the first higher-layer preset parameter set includes a first ControlResourceSetId, in the aspect of determining, according to the higher-layer parameter set, a DMRS port associated when sending PDSCH data of a physical downlink shared channel, the processing unit 802 is specifically configured to: when the first controlResourceSetId is smaller than a second controlResourceSetId, determining that the associated DMRS port is a port 1000 when the first TRP sends PDSCH data, wherein the second controlResourceSetId corresponds to a second high-level preset parameter set, and the second high-level preset parameter set is a high-level preset parameter set sent by a second TRP except the first TRP to the terminal device; or when the first ControlResourceSetId is smaller than the second ControlResourceSetId, determining that the DMRS port associated when the first TRP transmits PDSCH data is the port X.

In a possible example, if the transmission type corresponding to the first TRP is single-DCI transmission, and the first TPR is a TPR for transmitting DCI to the terminal device in the single-DCI transmission type, where the first TRP corresponds to a first high-level preset parameter set, the first high-level preset parameter set includes a third high-level layer indexpercoeset, and in the aspect of determining, according to the high-level parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel, the processing unit 802 is specifically configured to: when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port 1000; or when the third higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TPR transmits PDSCH data is port X.

When the processing unit 802 is a processor, the communication unit 803 is a communication interface, and the storage unit 801 is a memory, the network device according to the embodiment of the present invention may be the network device shown in fig. 6.

An embodiment of the present invention further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program enables a computer to perform some or all of the steps described in the terminal device in the above method embodiment.

Embodiments of the present invention further provide a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program enables a computer to perform some or all of the steps described in the network device in the above method embodiments.

Embodiments of the present invention also provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the terminal device in the above method embodiments. The computer program product may be a software installation package.

Embodiments of the present invention also provide a computer program product, where the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform some or all of the steps described in the network device in the method. The computer program product may be a software installation package.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware or may be embodied in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may reside as discrete components in an access network device, a target network device, or a core network device.

Those skilled in the art will appreciate that in one or more of the examples described above, the functionality described in embodiments of the invention may be implemented, in whole or in part, by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the embodiments of the present invention.

Claims

1. A method for determining a demodulation reference signal (DMRS) port is applied to terminal equipment, and is characterized by comprising the following steps:

2. The method of claim 1, wherein the DMRS ports comprise a port 1000 and a preset default port X, wherein X is 1002 or 1003.

3. The method according to claim 1 or 2, wherein the high level preset parameter set comprises at least one of: a high-level index HigherLayerIndexPerCORESET of each control resource set, a physical downlink shared channel scrambling DataScramblingIdentityPDSCH and a control resource set ControlResourceSetId.

4. The method according to any of claims 1-3, wherein if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first higher layer LayerIndexPerCORESET, the second higher layer preset parameter set includes a second higher layer LayerIndexPerCORESET, and the transmission type is multi-DCI transmission, the determining the associated DMRS port when the plurality of TRPs transmit Physical Downlink Shared Channel (PDSCH) data according to at least one of the higher layer preset parameter sets includes:

5. The method according to any one of claims 1 to 3, wherein if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first reference DataScramblnglidentityPDSCH, the second higher layer preset parameter set includes a second reference DataScrambllldndentityPDSCH, and when the transmission type is multi-DCI transmission, the determining the DMRS ports associated when the plurality of TRPs transmit physical downlink shared channel PDSCH data according to at least one of the higher layer preset parameter sets includes:

when the first reference DataScramblingIdentityPDSCH is the first DataScramblingIdentityPDSCH, determining the DMRS port associated when the first TRP transmits PDSCH data to be the port X, and determining the DMRS port associated when the second TRP transmits PDSCH data to be the port 1000.

6. The method according to any one of claims 1-3, wherein if the plurality of TRPs includes a first TRP and a second TRP, the first TRP corresponds to a first higher layer preset parameter set, the second TRP corresponds to a second higher layer preset parameter set, the first higher layer preset parameter set includes a first controlResourceSetId, the second higher layer preset parameter set includes a second controlResourceSetId, and the transmission type is multi-DCI transmission, the determining the associated DMRS port when the plurality of TRPs transmit Physical Downlink Shared Channel (PDSCH) data according to at least one of the higher layer preset parameter sets includes:

7. The method according to any of claims 1-3, wherein if the plurality of TRPs includes two TRPs, and the transmission type is single-DCI transmission, and the upper layer preset parameter set includes a third high layer IndexPerCORESET, the determining the associated DMRS port when the plurality of TRPs transmit PDSCH data according to at least one of the upper layer preset parameter sets includes:

when the third higherlayerrindexpercoeset is 0, determining the DMRS port associated with a first one of the two TPRs that transmits DCI when transmitting PDSCH data is the port X, and determining the DMRS port associated with a second one of the two TPRs that transmits PDSCH data other than the first TPR is the port 1000.

8. A method for determining a demodulation reference signal (DMRS) port is applied to a network device, wherein the network device comprises a first Transmission and Reception Point (TRP), and the method comprises the following steps:

sending a high-level preset parameter set to the terminal equipment;

9. The method of claim 8, wherein the DMRS ports comprise port 1000 and a preset default port X, wherein X is 1002 or 1003.

10. The method according to claim 8 or 9, wherein the high level preset parameter set comprises at least one of: a high-level index HigherLayerIndexPerCORESET of each control resource set, a physical downlink shared channel scrambling DataScramblingIdentityPDSCH and a control resource set ControlResourceSetId.

11. The method according to any one of claims 8 to 10, wherein if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher layer default parameter set, where the first higher layer default parameter set includes a first higherlayerrindexpercoreset, the determining, according to the higher layer parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel includes:

when the first higherlayerrindexpercoreset is 0, determining that the DMRS port associated when the first TRP transmits PDSCH data is port X.

12. The method according to any one of claims 8-10, wherein if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher layer preset parameter set, the first higher layer preset parameter set includes a first reference DataScramblingIdentityPDSCH, and the determining the DMRS port associated when transmitting the PDSCH data of the physical downlink shared channel according to the higher layer parameter set includes:

13. The method according to any one of claims 8-10, wherein if the transmission type corresponding to the first TRP is multi-DCI transmission and the first TRP corresponds to a first higher layer preset parameter set, the first higher layer preset parameter set includes a first ControlResourceSetId, and the determining, according to the higher layer parameter set, a DMRS port associated when transmitting PDSCH data of a physical downlink shared channel includes:

when the first controlResourceSetId is smaller than the second controlResourceSetId, determining that the associated DMRS port is a port X when the first TRP sends PDSCH data.

14. The method according to any one of claims 8 to 10, wherein if the transmission type corresponding to the first TRP is single-DCI transmission and the first TPR is a TPR for transmitting DCI to the terminal device in the single-DCI transmission type, the first TRP corresponds to a first higher-layer preset parameter set, the first higher-layer preset parameter set includes a third higherlayerrindexpercoeset, and the determining, according to the higher-layer parameter set, the DMRS port associated when transmitting PDSCH data of a physical downlink shared channel includes:

15. A terminal device, characterized in that the terminal device comprises a processing unit and a communication unit, wherein,

16. A network device, characterized in that the network device comprises a first transmission and reception point TRP, the network device comprising a processing unit and a communication unit, wherein,

17. A terminal device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-7.

18. A network device, characterized in that the network device is a transmission and reception point TRP, comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for carrying out the steps in the method according to any one of claims 8 to 14.

19. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 1-7.

20. A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to perform the method according to any one of claims 8-14.