CN115776364A - Communication method and device - Google Patents

Abstract

The application provides a communication method and device. The method comprises the following steps: the method comprises the steps that terminal equipment obtains at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information; the network equipment sends DCI signaling to the terminal equipment, wherein the DCI signaling comprises a first index, the first index is used for indicating first time domain resource allocation information, and the first time domain resource allocation information is one of at least one time domain resource allocation information; and the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information. According to the embodiment of the application, the flexible switching of the DMRS configuration information of the DCI level can be realized, and further the flexible switching of the R15 port and the R18 port and/or the flexible switching of the FD-OCC length can be realized.

Description

Communication method and device

technical field

The present application relates to the communication field, and in particular, to a communication method and device.

Background technique

In the R15 version of the 3rd generation partnership project (3GPP), two demodulation reference signal (dedicated demodulation reference signal, DMRS) resource mapping types are defined, namely type 1 (type1) and type 2 (type2). Among them, the upper limit of DMRS ports corresponding to type 1 is 8, and the upper limit of DMRS ports corresponding to type 2 is 12.

With the continuous development of communication technology, 12 DMRS ports cannot meet the communication requirements more and more. Therefore, in the R18 version of 3GPP, the number of DMRS ports is expanded (or expanded). As a way, type 1 can be enhanced, and the upper limit of the number of DMRS ports corresponding to type 1 enhancement can be 16. As another way, type 2 can be enhanced, and the upper limit of the number of DMRS ports corresponding to type 2 enhancement can be 24.

Therefore, in R18, R18 terminal equipment can use either R15 ports or R18 ports. In addition, the frequency domain mask length of the R15 port is 2, and the frequency domain mask length of the R18 port is 4. Therefore, for R18 terminal equipment, how to flexibly switch R15 ports and R18 ports, and flexibly switch 2 long frequency domain masks and 4 long frequency domain masks is an urgent problem to be solved.

Contents of the invention

The present application provides a communication method and device.

In a first aspect, a communication method is provided, including:

The terminal device acquires at least one time domain resource allocation information and at least one demodulation reference signal DMRS configuration information, the at least one time domain resource allocation information and the at least one DMRS configuration information are corresponding; the terminal device receives information from the Downlink control information DCI signaling of the network device, the DCI signaling includes a first index, the first index is used to indicate first time domain resource allocation information, and the first time domain resource allocation information is the at least One of time-domain resource allocation information; the terminal device determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, and the first DMRS configuration information is related to the first time-domain resource allocation information. Domain resource allocation information correspondence.

According to the embodiment of the present application, the terminal device can determine the DMRS configuration information according to the DCI signaling sent by the network device, so as to implement flexible scheduling of the DMRS configuration information at the DCI level. On this basis, flexible switching between the R15 DMRS port and the R18 DMRS port, and/or flexible switching of the length of the FD-OCC can be realized.

It should be understood that the terminal device in this application may be an R18 terminal device.

With reference to the first aspect, in some implementation manners of the first aspect, acquiring the at least one time domain resource allocation information and the at least one DMRS configuration information by the terminal device includes:

The terminal device receives radio resource control RRC signaling from the network device, the RRC signaling includes a time domain resource allocation TDRA field, and the TDRA field is used to configure the at least one time domain resource allocation information and the at least one DMRS configuration information.

In this embodiment of the present application, the terminal device may acquire the at least one piece of DMRS configuration information through RRC signaling. In addition, the at least one piece of DMRS configuration information may also be predefined in the protocol, so that the terminal device acquires the at least one piece of DMRS configuration information.

It should be understood that acquiring through RRC signaling can modify DMRS configuration information more flexibly than pre-defining in the protocol.

With reference to the first aspect, in some implementation manners of the first aspect, the RRC signaling further includes DMRS type information, the DMRS type information indicates any one of the first type and the second type, and the DCI The signaling also includes antenna port indication information; the method also includes:

The terminal device determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information; the terminal device determines a first antenna from the antenna port index group set according to the antenna port indication information Port index group.

With reference to the first aspect, in some implementation manners of the first aspect, the multiple antenna port candidate combinations satisfy any of the following:

When the DMRS type information indicates the first type, and the first DMRS configuration information indicates a first value, it corresponds to the first DMRS type; when the DMRS type information indicates the second type, and the first When the DMRS configuration information indicates the first value, it corresponds to the second DMRS type; when the DMRS type information indicates the first type, and the first DMRS configuration information indicates the second value, it corresponds to the third DMRS type; when When the DMRS type information indicates the second type, and the first DMRS configuration information indicates a second value, it corresponds to a fourth DMRS type.

Wherein, the third DMRS type is an enhancement of the first DMRS type, and the fourth DMRS type is an enhancement of the second DMRS type.

In the embodiment of the present application, the antenna port table (or called DMRS port table) includes multiple antenna port candidate combinations. For the above-mentioned first to fourth DMRS types, the antenna port table corresponding to each DMRS type may be different. The terminal device can realize the switching of the DMRS type according to the DMRS configuration information indicated by the DCI signaling, so as to realize the switching between the R15 port and the R18 port and the switching of the frequency domain mask length.

With reference to the first aspect, in some implementation manners of the first aspect, when the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the first DMRS port set; when the When the first DMRS configuration information indicates the second value, the ports in the antenna port index group set belong to the second DMRS port set.

In this embodiment of the present application, the first DMRS port set may be understood as an R15 port set, and the second DMRS port set may be understood as an R18 port set.

With reference to the first aspect, in some implementation manners of the first aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; the method also includes:

The terminal device determines an antenna port index group set according to the DMRS type information; the terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information; the terminal The device determines, according to the first DMRS configuration information, a frequency-domain mask length corresponding to a port in the first antenna port index group.

With reference to the first aspect, in some implementation manners of the first aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type, the ports in the antenna port index group set belong to the first DMRS type A DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, the ports in the antenna port index group set belong to the second DMRS port set. .

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determining the frequency-domain mask length of ports in the first antenna port index group includes:

When the first DMRS configuration information indicates the first value, the terminal device determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 2; when the first DMRS configuration information indicates the second value, the terminal device determines that the length of the frequency-domain mask corresponding to the port in the first antenna port index group is 4.

According to the embodiment of the present application, the terminal device can determine the frequency domain mask length corresponding to the port in the antenna port index group according to the DMRS configuration information indicated by the DCI signaling, so as to realize flexible switching of the frequency domain mask length.

With reference to the first aspect, in some implementation manners of the first aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; the method also includes:

The terminal device determines a set of antenna port index groups according to the DMRS type information and the first DMRS configuration information; the terminal device determines the first set of antenna port index groups from the set of antenna port index groups according to the antenna port indication information. Antenna port index group.

According to the embodiment of the present application, the terminal device can determine which antenna port table to use according to the DMRS type information and the DMRS configuration information, so as to realize flexible switching of the antenna port table.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set satisfies any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the set of antenna port index groups is a first set of antenna port index groups ; When the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the set of antenna port index groups is a second set of antenna port index groups; When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value; or, when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and when the first DMRS configuration information indicates a first value, the set of antenna port index groups is a third set of antenna port index groups.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set satisfies any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the second DMRS port A subset of a set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the ports in the antenna port index group set Belonging to the second DMRS port set; when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value, in the antenna port index group set The ports belong to the first DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a first value, the antenna port index group The ports in the set belong to the first DMRS port set.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set satisfies any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the first DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the ports in the antenna port index group set belong to the second A subset of the DMRS port set; when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value, in the antenna port index group set The ports belong to the second DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a first value, the antenna port index group The ports in the set belong to the second DMRS port set.

With reference to the first aspect, in some implementation manners of the first aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; the method also includes:

The terminal device determines an antenna port index group set according to the DMRS type information; the terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information; the terminal The device determines, according to the DMRS type information and the first DMRS configuration information, a frequency-domain mask length corresponding to a port in the first antenna port index group.

With reference to the first aspect, in some implementation manners of the first aspect, the set of antenna port index groups includes a second antenna port index group and a third antenna port index group, and the first antenna port index group in the second antenna port index group A frequency-domain mask length of a port is different from a frequency-domain mask length of the first port in the third antenna port index group.

With reference to the first aspect, in some implementation manners of the first aspect, the set of antenna port index groups includes a second port and a third port, and the second port and the third port are in the same CDM group , the second port is a port in the first DMRS port set, and the third port is a port in the second DMRS port set.

With reference to the first aspect, in some implementation manners of the first aspect, the antenna port index group set includes a fourth antenna port index group, and the fourth antenna port index group includes a fourth port and a fifth port, The length of the frequency domain mask corresponding to the fourth port is different from the length of the frequency domain mask corresponding to the fifth port.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device determines the frequency domain mask length corresponding to the port in the first antenna port combination, including:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the terminal device determines the port in the first antenna port index group The corresponding frequency domain mask length is 2; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the terminal device determines The frequency domain mask length corresponding to the port in the first antenna port index group is 4; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates When the first value is the first value, the terminal device determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 2; when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates the second value, the terminal device determines that the first antenna port index group includes ports with a frequency domain mask length of 2 and a frequency domain mask length of 4 ports.

According to the embodiment of the present application, the terminal device can realize flexible switching of the frequency domain mask length according to the DMRS configuration information indicated by the DCI signaling.

With reference to the first aspect, in some implementation manners of the first aspect, the multiple antenna port index groups included in the set of antenna port index groups correspond to multiple indexes, and the antenna port indication information is used to indicate that the multiple antenna port index groups One of the indexes.

With reference to the first aspect, in some implementation manners of the first aspect, the length of the frequency domain mask corresponding to the port in the first DMRS port set is 2, and the length of the frequency domain mask corresponding to the port in the second DMRS port set is The length is 4.

In a second aspect, a communication method is provided, including:

The network device sends radio resource control RRC signaling to the terminal device, the RRC signaling includes a time domain resource allocation TDRA field, and the TDRA field is used to configure at least one time domain resource allocation information and at least one demodulation reference signal DMRS configuration information, the correspondence between the at least one time domain resource allocation information and the at least one DMRS configuration information; the network device sends downlink control information DCI signaling to the terminal device, and the DCI signaling includes a first index , the first index is used to indicate first time-domain resource allocation information, and the first time-domain resource allocation information is one of the at least one time-domain resource allocation information.

According to the embodiment of the present application, the network device may send DCI signaling to the terminal device to indicate DMRS configuration information, so as to implement flexible scheduling of DCI-level DMRS configuration information. On this basis, flexible switching between the R15 DMRS port and the R18 DMRS port, and/or flexible switching of the length of the FD-OCC can be realized.

With reference to the second aspect, in some implementations of the second aspect, the first time domain resource allocation information corresponds to first DMRS configuration information; the first DMRS configuration information indicates a first value, and the first value Corresponding to any of the following: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15; or, the first DMRS configuration information indicates a second value, and the second value is the same as any of the following Item correspondence: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

With reference to the second aspect, in some implementation manners of the second aspect, the RRC signaling further includes DMRS type information, the DMRS type information indicates any one of the first type and the second type, and the DCI The signaling also includes antenna port indication information.

With reference to the second aspect, in some implementation manners of the second aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling further includes antenna port indication information.

In a third aspect, a communication device is provided. The communication device may be a terminal device, or a device (for example, a chip, or a chip system, or a circuit) in the terminal device, or a device that can be matched with the terminal device.

In a possible implementation, the communication device may include a one-to-one corresponding module or unit for executing the method/operation/step/action described in the first aspect. The module or unit may be a hardware circuit, software, or It can be implemented by combining hardware circuits with software.

In a possible implementation, the communication device includes: a transceiver unit and a processing unit connected to the transceiver unit.

The transceiver unit is configured to obtain at least one time domain resource allocation information and at least one demodulation reference signal DMRS configuration information, and the at least one time domain resource allocation information corresponds to the at least one DMRS configuration information; the transceiver unit is configured to Receive downlink control information DCI signaling from the network device, the DCI signaling includes a first index, the first index is used to indicate first time domain resource allocation information, and the first time domain resource allocation information One of the at least one time-domain resource allocation information; a processing unit configured to determine first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, the first DMRS configuration information and The first time-domain resource allocation information corresponds to.

With reference to the third aspect, in some implementation manners of the third aspect, the transceiver unit is configured to receive radio resource control RRC signaling from the network device, the RRC signaling includes a time domain resource allocation TDRA field, the The TDRA field is used to configure the at least one time domain resource allocation information and the at least one DMRS configuration information.

With reference to the third aspect, in some implementation manners of the third aspect, the RRC signaling further includes DMRS type information, the DMRS type information indicates any one of the first type and the second type, and the DCI The signaling also includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information and the first DMRS configuration information; a processing unit, configured to, according to the antenna port indication information, Determine a first antenna port index group from the set of antenna port index groups.

With reference to the third aspect, in some implementations of the third aspect, when the DMRS type information indicates the first type, and the first DMRS configuration information indicates a first value, it corresponds to the first DMRS type; when When the DMRS type information indicates the second type, and the first DMRS configuration information indicates a first value, it corresponds to the second DMRS type; when the DMRS type information indicates the first type, and the first When the DMRS configuration information indicates the second value, it corresponds to the third DMRS type; when the DMRS type information indicates the second type, and the first DMRS configuration information indicates the second value, it corresponds to the fourth DMRS type.

Wherein, the third DMRS type is an enhancement of the first DMRS type, and the fourth DMRS type is an enhancement of the second DMRS type.

With reference to the third aspect, in some implementation manners of the third aspect, when the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the first DMRS port set; when the When the first DMRS configuration information indicates the second value, the ports in the antenna port index group set belong to the second DMRS port set.

With reference to the third aspect, in some implementation manners of the third aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information; a processing unit, configured to determine an antenna port index group set according to the antenna Port indication information, determining a first antenna port index group from the set of antenna port index groups; a processing unit, configured to determine a frequency domain corresponding to a port in the first antenna port index group according to the first DMRS configuration information mask length.

With reference to the third aspect, in some implementations of the third aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type, the ports in the antenna port index group set belong to the first DMRS type A DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, the ports in the antenna port index group set belong to the second DMRS port set.

With reference to the third aspect, in some implementation manners of the third aspect, when the first DMRS configuration information indicates a first value, the processing unit is configured to determine a frequency domain corresponding to a port in the first antenna port index group The mask length is 2; when the first DMRS configuration information indicates the second value, the processing unit is configured to determine that the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

With reference to the third aspect, in some implementation manners of the third aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information and the first DMRS configuration information; processing A unit, configured to determine a first antenna port index group from the antenna port index group set according to the antenna port indication information.

With reference to the third aspect, in some implementation manners of the third aspect, the antenna port index group set satisfies any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the set of antenna port index groups is a first set of antenna port index groups ; When the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the set of antenna port index groups is a second set of antenna port index groups; When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value; or, when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and when the first DMRS configuration information indicates a first value, the set of antenna port index groups is a third set of antenna port index groups.

With reference to the third aspect, in some implementation manners of the third aspect, the antenna port index group set satisfies any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the second DMRS port A subset of a set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the ports in the antenna port index group set Belonging to the second DMRS port set; when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value, in the antenna port index group set The ports belong to the first DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a first value, the antenna port index group The ports in the set belong to the first DMRS port set.

With reference to the third aspect, in some implementation manners of the third aspect, the multiple antenna port candidate combinations satisfy any of the following:

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value, the ports in the antenna port index group set belong to the first DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a second value, the ports in the antenna port index group set belong to the second A subset of the DMRS port set; when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a second value, in the antenna port index group set The ports belong to the second DMRS port set; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates a first value, the antenna port index group The ports in the set belong to the second DMRS port set.

With reference to the third aspect, in some implementation manners of the third aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling also includes antenna port indication information; a processing unit, configured to determine an antenna port index group set according to the DMRS type information; a processing unit, configured to determine an antenna port index group set according to the antenna Port indication information, determining a first antenna port index group from the set of antenna port index groups; a processing unit, configured to determine the first antenna port index group according to the DMRS type information and the first DMRS configuration information The frequency domain mask length corresponding to the middle port.

With reference to the third aspect, in some implementation manners of the third aspect, the set of antenna port index groups includes a second antenna port index group and a third antenna port index group, and the first antenna port index group in the second antenna port index group A frequency-domain mask length of a port is different from a frequency-domain mask length of the first port in the third antenna port index group.

With reference to the third aspect, in some implementation manners of the third aspect, the set of antenna port index groups includes a second port and a third port, and the second port and the third port are in the same CDM group , the second port is a port in the first DMRS port set, and the third port is a port in the second DMRS port set.

With reference to the third aspect, in some implementation manners of the third aspect, the set of antenna port index groups includes a fourth antenna port index group, and the fourth antenna port index group includes a fourth port and a fifth port, The length of the frequency domain mask corresponding to the fourth port is different from the length of the frequency domain mask corresponding to the fifth port.

With reference to the third aspect, in some implementations of the third aspect, when the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates a first value , a processing unit, configured to determine that the length of the frequency domain mask corresponding to the port in the first antenna port index group is 2; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the When the first DMRS configuration information indicates a second value, the processing unit is configured to determine that the frequency domain mask length corresponding to the port in the first antenna port index group is 4; when the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates the first value, the processing unit is configured to determine that the frequency domain mask length corresponding to the port in the first antenna port index group is 2 ; When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates the second value, a processing unit configured to determine the first antenna port The index group includes ports with a frequency domain mask length of 2 and ports with a frequency domain mask length of 4.

With reference to the third aspect, in some implementation manners of the third aspect, the multiple antenna port index groups included in the set of antenna port index groups correspond to multiple indexes, and the antenna port indication information is used to indicate that the multiple antenna port index groups One of the indexes.

With reference to the third aspect, in some implementation manners of the third aspect, the length of the frequency domain mask corresponding to the port in the first DMRS port set is 2, and the length of the frequency domain mask corresponding to the port in the second DMRS port set is The length is 4.

In a fourth aspect, a communication device is provided. The communication device may be a network device, or a device in the network device (for example, a chip, or a chip system, or a circuit), or a device that can be matched with the network device.

In a possible implementation, the communication device may include a one-to-one corresponding module or unit for executing the method/operation/step/action described in the second aspect. The module or unit may be a hardware circuit, software, or It can be implemented by combining hardware circuits with software.

In a possible implementation, the communication device includes: a transceiver unit and a processing unit connected to the transceiver unit.

A transceiver unit, configured to send radio resource control RRC signaling to the terminal device, the RRC signaling includes a time domain resource allocation TDRA field, and the TDRA field is used to configure at least one time domain resource allocation information and at least one demodulation reference Signal DMRS configuration information, correspondence between the at least one time domain resource allocation information and the at least one DMRS configuration information; a transceiver unit, configured to send downlink control information DCI signaling to the terminal device, in the DCI signaling A first index is included, where the first index is used to indicate first time-domain resource allocation information, and the first time-domain resource allocation information is one of the at least one time-domain resource allocation information.

With reference to the fourth aspect, in some implementations of the fourth aspect, the first time domain resource allocation information corresponds to first DMRS configuration information; the first DMRS configuration information indicates a first value, and the first value Corresponding to any of the following: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15; or, the first DMRS configuration information indicates a second value, and the second value is the same as any of the following Item correspondence: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the RRC signaling further includes DMRS type information, the DMRS type information indicates any one of the first type and the second type, and the DCI The signaling also includes antenna port indication information.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the RRC signaling further includes DMRS type information, and the DMRS type information indicates the first DMRS type, the second DMRS type, the third DMRS type, and the first DMRS type. Any one of the four DMRS types, the DCI signaling further includes antenna port indication information.

In a fifth aspect, a communication device is provided, including a communication interface and a processor, the communication interface is used to output and/or input signals, and the processor is used to execute a computer program or instruction stored in a memory, so that the communication device executes the first The method in any possible implementation manner in one aspect; or, causing the communication device to execute the method in any possible implementation manner in the second aspect.

Optionally, the memory may be included in the communication device. In one manner, the memory may be set separately from the processor; in another manner, the memory may be located in the processor and integrated with the processor.

Optionally, the memory may also be outside the communication device and coupled with the processor.

According to a sixth aspect, there is provided a computer-readable storage medium, including a computer program. When the computer program is run on a computer, it causes the computer to execute the method in any possible implementation manner of the first aspect, or causes the computer to execute the method of the second aspect. A method in any of the possible implementations.

In a seventh aspect, there is provided a chip or a chip system, the chip or the chip system includes a processing circuit and an input and output interface, and the processing circuit is used to execute the method in any possible implementation of the first aspect; or, the processing circuit is used to Execute the method in any possible implementation manner of the second aspect.

In an eighth aspect, a computer program product is provided, and the computer program product includes: a computer program (also referred to as code, or an instruction), when the computer program is executed, the computer executes any possible implementation manner in the first aspect The method in the method; or, causing the computer to execute the method in any possible implementation manner in the second aspect.

In a ninth aspect, a communication system is provided, including a terminal device and a network device. The terminal device is configured to execute the method in any possible implementation manner in the first aspect. The network device is configured to execute the method in any possible implementation manner of the second aspect.

Description of drawings

Figure 1 shows a communication system to which this application applies.

Fig. 2 is a schematic interaction diagram of an example of the method proposed in this application.

Fig. 3 is a schematic interaction diagram of an example of the method proposed in this application.

Fig. 4 is a schematic interaction diagram of an example of the method proposed in this application.

Fig. 5 is a schematic interaction diagram of an example of the method proposed in this application.

FIG. 6 is a schematic interaction diagram of an example of the method proposed in this application.

Fig. 7 is a schematic block diagram of a communication device provided in this application.

Fig. 8 is a schematic block diagram of a communication device provided in this application.

Detailed ways

For ease of understanding, some technical content involved in this application is explained first.

(1) Terminal equipment

A terminal device may be various types of devices that provide voice and/or data connectivity to users, and may also be called a terminal, user equipment (user equipment, UE), mobile station, mobile terminal, and so on. Terminals can be widely used in various scenarios, for example, device-to-device (device-to-device, D2D), vehicle-to-everything (V2X) communication, machine-type communication (machine-type communication, MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, aerospace equipment, etc. In the embodiment of the present application, the chip used in the above-mentioned device may also be called a terminal.

(2) Network equipment

The network device in the embodiment of the present application may be an access network device such as a base station, and the base station may be a base station in a global system of mobile communication (GSM) system or a code division multiple access (CDMA) ( base transceiver station, BTS), may also be a base station in a wideband code division multiple access (WCDMA) system, and may also be an evolved base station (evolutional nodeB) in a long term evolution (long term evolution, LTE) system , eNB or eNodeB), the next generation base station (next generation NodeB, gNB) in the fifth generation (5th generation, 5G) mobile communication system, the next generation base station in the sixth generation (6th generation, 6G) mobile communication system, future Base stations in mobile communication systems, etc. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device. For example, the network device may also be a module or unit that completes some functions of the base station, for example, it may be a centralized unit (central unit, CU) or a distributed unit (distributed unit, DU). Among them, the CU and the DU respectively complete a part of the protocol stack functions of the base station. In addition, the functions of the CU can be implemented by multiple entities. For example, the functions of the CU control plane (control plane, CP) and user plane (user plane, UP) are separated to form the CU control plane (CU-CP) and the CU user plane ( CU-UP). For example, CU-CP and CU-UP can be realized by different functional entities and connected through E1 interface, and CU-CP and CU-UP can be coupled with DU.

(3) Dedicated demodulation reference signal (DMRS)

DMRS is used to estimate the equivalent channel matrix of a data channel or a control channel, so as to be used for data detection and demodulation. Exemplarily, the data channel may be a physical downlink shared channel (physical downlink shared channel, PDSCH), or a physical uplink shared channel (physical uplink shared channel, PUSCH). Exemplarily, the control channel may be a (physical downlink control channel, PDCCH).

Taking the data channel PDSCH as an example, the DMRS usually performs the same precoding as the transmitted data signal, so as to ensure that the DMRS and the data experience the same equivalent channel.

In order to reduce mutual interference between DMRS resources corresponding to multiple DMRS ports, resource mapping may be performed in a manner of frequency division multiplexing, time division multiplexing or code division multiplexing. In R15, two types of DMRS resource mapping (respectively marked as type1 and type2) are supported. For Type 1 (Type 1) DMRS, it can support up to 8 orthogonal DMRS ports; for Type 2 (Type 2) DMRS, it can support up to 12 orthogonal DMRS ports.

Generally, one DMRS port corresponds to one transport stream. For example, for multiple-input-multiple-output (MIMO) transmission in which the number of transmission streams is R, the number of DMRS ports is R.

(4) Code division multiplexing (CDM) group

A network device can divide DMRS ports into multiple CDM groups. The time-frequency resources occupied by the DMRS ports in the same CDM group are the same.

Take type 1 DMRS as an example: For single-symbol DMRS, a maximum of 4 DMRS ports are supported in R15, and DMRS resources occupy one OFDM symbol. The 4 DMRS ports are divided into 2 CDM groups, where CDM group 0 includes port 0 and port 1; CDM group 1 includes port 2 and port 3. CDM group 0 and CDM group 1 are frequency division multiplexed. The DMRS ports included in the CDM group are mapped to the same time-frequency resource. The DMRSs corresponding to the DMRS ports included in the CDM group are distinguished by an orthogonal cover code (OCC), so as to ensure the orthogonality of the DMRS ports in the CDM group. Specifically, port 0 and port 1 are located in the same resource element (RE), and resource mapping is performed in a comb-tooth manner in the frequency domain, that is, adjacent frequency domain resources occupied by port 0 and port 1 are separated by one subcarrier . For a DMRS port, the occupied two adjacent REs correspond to an OCC codeword sequence with a length of two. For example, for subcarrier 0 and subcarrier 2, port 0 and port 1 use a set of OCC codeword sequences of length 2 (+1+1 and +1-1). Similarly, port 2 and port 3 are located in the same resource element (RE), and are mapped to unoccupied REs of port 0 and port 1 in a comb-tooth manner in the frequency domain. For subcarrier 1 and subcarrier 3, port 2 and port 3 use a set of length 2 OCC codeword sequences (+1+1 and +1-1).

(5)OCC

OCC can be divided into two types: frequency domain OCC (denoted as FD-OCC) and time domain OCC (denoted as TD-OCC).

Correspondingly, the length of the OCC can also be divided into two types, namely, the length of the FD-OCC and the length of the TD-OCC.

(6) DMRS port number expansion (expansion)

In R15, two DMRS resource mapping types are defined, namely type 1 (type1) and type 2 (type2). Among them, the upper limit of the number of DMRS ports corresponding to type 1 is 8, and the upper limit of the number of DMRS ports corresponding to type 2 is 12. It can support up to 12 orthogonal DMRS ports. In addition, in R15, the FD-OCC length of the DMRS port is 2.

In R18, as a way, type 1 can be enhanced, and the number of DMRS ports corresponding to type 1 is enhanced to 16; as another way, type 2 can be enhanced, and the corresponding DMRS ports after type 2 enhancement The maximum number is 24. In addition, in R18, the FD-OCC length of the DMRS port can be 4.

Exemplarily, the enhanced type 1 can be recorded as type 1-E, or type 1-R18, or type 3; the enhanced type 2 can be recorded as type 2-E, or type 2-R18, or type 4. It should be understood that this application does not limit the names of enhanced type 1 and enhanced type 2.

That is to say, the full set of configuration types corresponding to the high-level signaling of the R18 DMRS port can be: type 1, type 2, type1-E, and type 2-E.

(7) The first DMRS port set and the second DMRS port set

In this application, the first DMRS port set can be understood as an R15 port set. The second DMRS port set can be understood as an R18 port set. That is to say, the first DMRS port set may only include ports defined in R15. The second DMRS port set may include ports defined in R15, or may include ports newly added in R18.

The FD-OCC length corresponding to the ports in the first DMRS port set may be 2. The FD-OCC length corresponding to the ports in the second DMRS port set may be 4.

In addition, for the above-mentioned different resource mapping types, the upper limit of the number of ports included in the first DMRS port set and the second DMRS port set may be different.

For example, for a type 1 single symbol, the upper limit of the number of ports included in the first DMRS port set may be 4; for a type 1 double symbol, the upper limit of the number of ports included in the first DMRS port set may be 8. For type 2 single symbols, the upper limit of the number of ports included in the first DMRS port set may be 6; for type 2 double symbols, the upper limit of the number of ports included in the first DMRS port set may be 12.

For another example, for type 3 single symbols, the upper limit of the number of ports included in the second DMRS port set may be 8; for type 3 double symbols, the upper limit of the number of ports included in the second DMRS port set may be 16 . For type 4 single symbols, the upper limit of the number of ports included in the second DMRS port set may be 12; for type 4 double symbols, the upper limit of the number of ports included in the second DMRS port set may be 24.

(8) The method for the terminal device to obtain the information of the DMRS port allocated to it by the network device

During data transmission, the network device notifies the terminal device of the corresponding allocated DMRS port. Based on the allocated DMRS port, the terminal device receives the pilot signal and performs the corresponding channel estimation process at the corresponding resource position according to the DMRS symbol generation method and the time-frequency resource mapping rule defined in the protocol.

The DMRS ports involved in this application are mainly used for the transmission of uplink and downlink data signals (PUSCH and PDSCH). For this kind of DMRS reference signal configured for data transmission, its high-layer signaling configuration is located in PDSCH configuration (PDSCH-config) or PUSCH configuration (PUSCH-config). Taking PDSCH-config as an example below, the method for the network device to notify the terminal device of the allocated DMRS port will be described. Specifically, the following three steps may be included.

Step 1: The network device sends PDSCH-config signaling to the terminal device.

A possible data structure of PDSCH-config signaling is defined in the existing standard, as follows (contents not involved in this application are replaced by "..."):

PDSCH-Config::=SEQUENCE{

...

dmrs-DownlinkForPDSCH-MappingTypeA SetupRelease{DMRS-DownlinkConfig}OPTIONAL,

dmrs-DownlinkForPDSCH-MappingTypeB SetupRelease{DMRS-DownlinkConfig}OPTIONAL,

...

pdsch-TimeDomainAllocationList SetupRelease{PDSCH-TimeDomainResourceAllocationList}

OPTIONAL,

...

}

Wherein, a possible data structure of the DMRS downlink configuration (DMRS-DownlinkConfig) field included in the PDSCH-config signaling is as follows:

DMRS-DownlinkConfig-r18::=SEQUENCE{

dmrs-Type ENUMERATED{type2}OPTIONAL,

...

maxLength ENUMERATED{len2}OPTIONAL,

...

}

It should be understood that the DMRS type (dmrs-Type) is used to indicate one of type1 and type2. The maximum length (maxLength) is used to indicate one of single and double symbols.

Among them, a possible data structure of the PDSCH time domain resource allocation list (PDSCH-TimeDomainResourceAllocationList) field in the PDSCH-config signaling is as follows:

PDSCH-TimeDomainResourceAllocationList::=SEQUENCE(SIZE(1..maxNrofDL-Allocations))OF PDSCH-TimeDomainResourceAllocation

PDSCH-TimeDomainResourceAllocation::=SEQUENCE{

k0 INTEGER(0..32) OPTIONAL,

mappingType ENUMERATED{typeA,typeB},

startSymbolAndLength INTEGER(0..127)

}

It should be understood that k0 is used to indicate a starting slot (slot) offset, mappingType is used to indicate a mapping type, and startSymbolAndLength is used to indicate a starting symbol and length.

Exemplarily, the content indicated by the time domain resource allocation (time domain resource allocation, TDRA) list field can refer to Table 1:

Table 1

index K₀ Mapping type SLIV 1 1 Type A 66 2 1 Type A 27 3 2 Type B 101 … … … …

Taking the value of Row index as 1 as an example, the value of k0 indicates that there is 1 slot between the PDSCH and the scheduled PDCCH. The value of MappingType corresponds to the PDSCH configuration type as TypeA, and the start and length indicator (SLIV) corresponds to The value of indicates the initial transmission symbol and the number of continuous matches of PDSCH in the transmission slot.

In addition, when the pdsch-TimeDomainAllocationList field is not included in the PDSCH-config signaling, multiple pieces of time-domain resource allocation information may be pre-configured in the terminal device. Exemplarily, the pieces of time-domain resource allocation information pre-configured in the terminal device may be as shown in Table 2 below.

Table 2

index Mapping type K₂ S L 1 Type A j 0 14 2 Type A j 0 12 … … … … …

Step 2:

The network device sends DCI signaling to the terminal device. The DCI signaling includes an antenna port (Antenna port) field and a TDRA field. Wherein, the Antenna port field includes an index, which is used to indicate the DMRS port allocated by the network device. The TDRA domain includes an index, which is used to indicate time-domain resource allocation information, for example, the index is an index in Table 1 or an index in Table 2.

Step 3:

The terminal device determines the DMRS port allocated by the network device according to the received PDSCH-config signaling and DCI signaling.

It should be understood that for different values of dmrs-Type and maxLength, different DMRS port tables can be defined. The terminal device can determine the DMRS port allocated by the network device from the corresponding DMRS port table according to the DCI signaling.

Exemplarily, for a type1 single symbol, the corresponding DMRS port table may be as shown in Table 3 below, and the index included in the Antenna port field in the DCI signaling may be an index in Table 3.

table 3

(9) Antenna port index group and antenna port index group set

Taking Table 3 as an example, the "DMRS port" corresponding to each row in Table 3 can be called an "antenna port index group", and all the "antenna port index groups" in Table 3 can be called an "antenna port index group". gather". In the embodiment of the present application, one "antenna port index group set" corresponds to one "DMRS port table". In other words, one "antenna port index group set" corresponds to one "antenna port table".

The technical problem addressed by this application will be described below.

As mentioned above, in R18, R18 terminal equipment can use R15 ports and R18 ports. Therefore, how to flexibly schedule these two DMRS ports is an urgent problem to be solved. In addition, the FD-OCC length corresponding to the DMRS port in R15 is 2, and the FD-OCC length corresponding to the DMRS port in R18 can be 4, so how to flexibly schedule the FD-OCC length of the DMRS port is also a problem that needs to be solved.

In view of the above technical problem, as shown in Figure 2, the present application provides a method 200, specifically, the method 200 includes:

S201. The terminal device acquires at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information.

There is a correspondence between the at least one time domain resource allocation information and the at least one DMRS configuration information. Exemplarily, the at least one time-domain resource allocation information and the at least one DMRS configuration information have a one-to-one correspondence relationship, or a many-to-one correspondence relationship, which is not limited in this application.

The value of each piece of DMRS configuration information in the at least one piece of DMRS configuration information may be the first value or the second value.

The first value is used to indicate R15, or used to indicate that the upper limit value of the number of DMRS ports is 8, or used to indicate that the upper limit value of the number of DMRS ports is 12, or used to indicate that the DMRS type is not enhanced, or used to indicate The length of the frequency domain mask corresponding to the DMRS port is 2.

The second value is used to indicate R18, or used to indicate that the upper limit value of the number of DMRS ports is 16, or used to indicate that the upper limit value of the number of DMRS ports is 24, or used to indicate that the DMRS type has been enhanced, or used to indicate The frequency domain mask length corresponding to the DMRS port is 4.

The following describes how the terminal device obtains at least one time domain resource allocation information and at least one DMRS configuration information:

Method 1:

The network device sends radio resource control (radio resource control, RRC) signaling to the terminal device. Correspondingly, the terminal equipment receives the RRC signaling.

Exemplarily, the RRC signaling in this application may be PDSCH-config signaling or PUSCH-config signaling. Regarding this, no further details will be given below.

The RRC signaling includes a TDRA field (for example, the TDRA field may correspond to the above pdsch-TimeDomainAllocationList). The TDRA field is used to configure at least one time domain resource allocation information and the at least one DMRS configuration information.

Wherein, each time domain resource allocation information in the at least one time domain resource allocation information may include the above mapping type (mappingType) parameter and start symbol and length (startSymbolAndLength) parameter, optionally, may also include the above The "k0" parameter.

Optionally, as a manner, an indication field may be newly added in the TDRA field, and the newly added indication field is used to configure at least one piece of DMRS configuration information.

Exemplarily, after adding an indication field in the TDRA field, the contents indicated by the TDRA field may be shown in Table 4 below.

Table 4

index K₀ Mapping type SLIV DMRS configuration information 1 1 Type A 66 first value 2 1 Type A 27 second value 3 2 Type B 101 first value … … … …

Optionally, as another manner, the above at least one DMRS configuration information may be configured through one or more existing indication fields in the TDRA field. For example, the at least one piece of DMRS configuration information may be implicitly configured through a "k0" parameter, or the at least one piece of DMRS configuration information may be implicitly configured through a "k0" parameter and a "SLIV" parameter.

Optionally, the TDRA field included in the RRC signaling may be used to configure at least one time domain resource allocation information, and other fields in the RRC signaling except the TDRA field may be used to configure at least one DMRS configuration information. At this time, the at least one time domain resource allocation information and the at least one DMRS configuration information may have a corresponding relationship by default.

Method 2:

At least one time domain resource allocation information and at least one DMRS configuration information are preconfigured in the protocol. The terminal device can acquire at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information according to the supported protocol.

Exemplarily, the at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information preconfigured in the protocol may be shown in Table 5 below.

table 5

index mapping type K₂ S L DMRS configuration information 1 Type A j 0 14 first value 2 Type A j 0 12 second value … … … … … …

S202. The network device sends DCI signaling to the terminal device. Correspondingly, the terminal device receives the DCI signaling from the network device.

The DCI includes a first index, and the first index is used to indicate first time-domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information.

Exemplarily, the TDRA field in the DCI signaling may include the first index.

The DCI also includes antenna port indication information (corresponding to the above-mentioned antenna port (Antenna port) field), and the antenna port indication information is used to indicate the DMRS port allocated by the network equipment to the terminal equipment.

Specifically, the network device may determine the time domain resource allocated to the terminal device, and indicate the time domain resource to the terminal device through the TDRA field in the DCI signaling.

The network device may also determine the number and number of DMRS ports allocated to the terminal device, and indicate to the terminal device the DMRS ports allocated to the terminal device through the Antenna port field in the DCI signaling.

It should be understood that in the embodiment of the present application, the network device may also determine the DMRS configuration information corresponding to the data transmission process, for example, indicate the DMRS configuration information to the terminal device through the TDRA field in the DCI signaling.

That is to say, in this embodiment of the present application, the index included in the TDRA field in the DCI signaling may also be used to indicate DMRS configuration information in addition to indicating time domain resource allocation information.

For example, when the network device determines that the DMRS configuration information corresponding to a certain data transmission process is the first DMRS configuration information, the network device generates DCI signaling #1, and the DCI signaling #1 includes a first index, through which the first index Indicates the first DMRS configuration information. After that, the network device determines that the DMRS configuration information corresponding to the next data transmission process is the second DMRS configuration information, then the network device generates DCI signaling #2, which includes the second index, and through the second The index indicates second DMRS configuration information.

That is, according to the embodiment of the present application, scheduling of DCI-level DMRS configuration information can be implemented.

S203. The terminal device determines first DMRS configuration information from the at least one piece of DMRS configuration information according to the DCI signaling, where the first DMRS configuration information corresponds to the first time domain resource allocation information.

Exemplarily, if the terminal device acquires the at least one piece of DMRS configuration information through way 1 in S201, the terminal device may determine the first DMRS configuration information according to the first index in the DCI signaling. Taking Table 4 as an example, when the value of the first index is "1", the first DMRS configuration information corresponds to the first value.

Exemplarily, if the terminal device acquires the at least one piece of DMRS configuration information through method 2 in S201, the terminal device may determine the first DMRS configuration information according to the first index in the DCI signaling. Taking Table 5 as an example, when the value of the first index is "2", the first DMRS configuration information corresponds to the second value.

According to the embodiment of the present application, the network device can indicate different DMRS configuration information to the terminal device through different DCI signaling, so as to realize flexible scheduling of DCI-level DMRS configuration information. On this basis, flexible scheduling of R15 DMRS ports and R18 DMRS ports, and/or flexible scheduling of FD-OCC length can be realized.

The method 200 will be described in detail below in conjunction with the method 300 . In the method 300, the DMRS type is jointly indicated by the DMRS type information and the DMRS configuration information, and the network device can send different DCI signaling to realize switching between the R15 port and the R18 port. As shown in FIG. 3, the method 300 specifically includes:

S301. The network device sends RRC signaling to the terminal device. Correspondingly, the terminal equipment receives the RRC signaling.

The RRC signaling includes DMRS type information, and optionally, the RRC signaling may also include a TDRA field.

Exemplarily, the DMRS type information may correspond to the dmrs-Type in the above DMRS-DownlinkConfig field.

Wherein, the DMRS type information indicates any one of the first type (corresponding to type 1 above) and the second type (corresponding to type 2 above).

The TDRA field is used to configure at least one time domain resource allocation information and at least one DMRS configuration information, and the at least one time domain resource allocation information corresponds to the at least one DMRS configuration information. For a specific configuration manner, refer to manner 1 in S201.

Optionally, as another way, if the RRC signaling does not include the TDRA field, at this time, the terminal device may acquire at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information according to way 2 in S201.

S302. The network device sends DCI signaling to the terminal device. Correspondingly, the terminal device receives the DCI signaling from the network device.

The DCI includes a first index, and the first index is used to indicate first time-domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information. Exemplarily, the first index may be carried in the TDRA field in the DCI signaling.

The DCI also includes antenna port indication information (corresponding to the Antenna port field above), where the antenna port indication information is used to indicate the DMRS port allocated by the network device to the terminal device.

S303. The terminal device determines first DMRS configuration information from at least one piece of DMRS configuration information according to the DCI signaling, where the first DMRS configuration information corresponds to first time domain resource allocation information.

For this process, refer to S203.

S304. The terminal device determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information.

Specifically, the terminal device determines the antenna port table (or called the DMRS port table) according to the DMRS type information, the first DMRS configuration information and the "maxLength" parameter, and the antenna port table includes multiple antenna port index groups and multiple Correspondence between indexes.

Case 1:

When the DMRS type information indicates the first type, and the first DMRS configuration information indicates the first value, corresponding to the first DMRS type, the antenna port table determined by the terminal device may refer to existing protocols. The ports in the antenna port index group set belong to the first DMRS port set. The length of the frequency domain mask corresponding to the port in the first DMRS port set is 2. The upper limit of the number of ports in the first DMRS port set is 8.

Case 2:

When the DMRS type information indicates the second type, and the first DMRS configuration information indicates the first value, corresponding to the second DMRS type, the antenna port table determined by the terminal device may refer to existing protocols. The ports in the antenna port index group set belong to the first DMRS port set. The length of the frequency domain mask corresponding to the port in the first DMRS port set is 2. The upper limit of the number of ports in the first DMRS port set is 12.

Case 3:

When the DMRS type information indicates the first type, and the first DMRS configuration information indicates the second value, corresponding to the third DMRS type (that is, type1-E above), the antenna port table determined by the terminal device is as follows in method 600 Table D1 (corresponding to single symbol) or Table D2 (corresponding to double symbol). The ports in the antenna port index group set belong to the second DMRS port set. The length of the frequency domain mask corresponding to the port in the second DMRS port set is 4.

Case 4:

When the DMRS type information indicates the second type, and the first DMRS configuration information indicates the second value, corresponding to the fourth DMRS type (that is, type2-E above), the antenna port table determined by the terminal device is as follows in method 600 Table D3 (corresponding to single symbol), Table D4-1 (corresponding to double symbol) or Table D4-2 (corresponding to double symbol). The ports in the antenna port index group set belong to the second DMRS port set. The length of the frequency domain mask corresponding to the port in the second DMRS port set is 4.

S305. The terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

It can be known from S304 that the multiple antenna port index groups included in the antenna port index group set correspond to multiple indices. The antenna port indication information is used to indicate a certain index in the plurality of indices. The terminal device may determine the first antenna port index group from multiple antenna port index groups according to the index.

Optionally, the terminal device may also determine the number of CDM groups that do not transmit data on the symbol where the DMRS is located (that is, Number of DMRS CDM group(s) without data).

According to the method 300 of the embodiment of the present application, the network device can respectively indicate different DMRS configuration information by sending multiple DCI signaling, so as to realize switching between the R15 port and the R18 port.

For example, when the network device determines that the total number of streams of MU-MIMO is less than or equal to the maximum number of streams (12 streams) supported by the R15DMRS port, the network device sends DCI signaling to the terminal device, and the terminal device according to The DIC signaling determines the first DMRS configuration information, and the first DMRS configuration information is the first value, so as to support the R18 terminal equipment to fall back to use the R15 port.

For another example, when the network device determines that the total number of streams of MU-MIMO is greater than the maximum number of streams (12 streams) supported by the R15 DMRS port, the network device sends DCI signaling to the terminal device, and the terminal device determines the first DMRS according to the DIC signaling. configuration information, and the first DMRS configuration information is the second value, so as to support the R18 terminal equipment to use the R18 port, improve the MU-MIMO space division multiplexing capability, and improve the total spectrum efficiency.

The method 200 will be described in detail below in conjunction with the method 400 . In the method 400, the DMRS type is indicated by the DMRS type information configured by RRC signaling, and the network device can send different DCI signaling to realize switching between 2-length FD-OCC and 4-length FD-OCC. As shown in FIG. 4, the method 400 specifically includes:

S401. The network device sends RRC signaling to the terminal device. Correspondingly, the terminal equipment receives the RRC signaling.

The RRC signaling includes DMRS type information, and optionally also includes a TDRA field.

Among them, the DMRS type information indicates the first DMRS type (corresponding to type 1 above), the second DMRS type (corresponding to type 2 above), the third DMRS type (corresponding to type 1-E above) and the fourth DMRS Any of the types (corresponding to type 2-E above).

The TDRA field is used to configure at least one time-domain resource allocation information and at least one DMRS configuration information, and the at least one time-domain resource allocation information is corresponding to at least one DMRS configuration information. For a specific configuration manner, refer to manner 1 in S201.

Optionally, as another manner, the RRC signaling does not include the TDRA field. At this time, the terminal device may acquire at least one piece of time domain resource allocation information and at least one piece of DMRS configuration information according to scheme 2 in S201.

S402. The network device sends DCI signaling to the terminal device. Correspondingly, the terminal device receives the DCI signaling from the network device.

The DCI includes a first index, and the first index is used to indicate first time-domain resource allocation information. The first time domain resource allocation information is one of the at least one time domain resource allocation information. Exemplarily, the first index may be carried in the TDRA field in the DCI signaling.

The DCI also includes antenna port indication information (corresponding to the Antenna port field above), where the antenna port indication information is used to indicate the DMRS port allocated by the network device to the terminal device.

S403. The terminal device determines first DMRS configuration information from at least one piece of DMRS configuration information according to the DCI signaling, where the first DMRS configuration information corresponds to first time domain resource allocation information.

For this process, refer to S203.

S404. The terminal device determines an antenna port index group set according to the DMRS type information.

Specifically, the terminal device determines the antenna port table (or called the DMRS port table) according to the DMRS type information and the "maxLength" parameter, and the antenna port table includes multiple antenna port index groups and correspondence between multiple indices .

The following sub-cases are described.

Case 1:

When the DMRS type information indicates the first DMRS type, the antenna port table determined by the terminal device may refer to existing protocols.

Case 2:

When the DMRS type information indicates the second DMRS type, the antenna port table determined by the terminal device may refer to existing protocols.

Case 3:

When the DMRS type information indicates the third DMRS type, the antenna port table determined by the terminal device is shown in table D1 (corresponding to single symbol) or table D2 (corresponding to double symbol) in the following method 600 .

Case 4:

When the DMRS type information indicates the fourth DMRS type, the antenna port table determined by the terminal device is as Table D3 (corresponding to single symbol), table D4-1 (corresponding to double symbol) or table D4-2 (corresponding to double symbol) in the following method 600 ) shown.

S405. The terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

It can be known from S404 that the multiple antenna port index groups included in the antenna port index group set correspond to multiple indices. The antenna port indication information is used to indicate a certain index in the plurality of indices. The terminal device may determine the first antenna port index group from multiple antenna port index groups according to the index.

Optionally, the terminal device may also determine the number of CDM groups that do not transmit data on the symbol where the DMRS is located.

S406. The terminal device determines a frequency domain mask length corresponding to a port in the first antenna port index group according to the first DMRS configuration information.

Case A:

When the first DMRS configuration information indicates the first value, the terminal device determines that the length of the frequency domain mask corresponding to the port in the first antenna port index group is 2.

Exemplarily, if the first antenna port index group is determined from the table corresponding to case 3 or case 4 of S404, although the ports in the first antenna port index group belong to the R18 port and the FD-OCC length is 4, But in case A, the ports in the first antenna port index group can be rolled back from 4-length FD-OCC to 2-length FD-OCC.

Case B:

When the first DMRS configuration information indicates the second value, the terminal device determines that the length of the frequency domain mask corresponding to the port in the first antenna port index group is 4.

Exemplarily, if the first antenna port index group is determined from the table corresponding to case 1 or case 2 of S404, although the ports in the first antenna port index group belong to the R15 port and the FD-OCC length is 2, But in case B, the ports in the first antenna port index group can be extended from 2-length FD-OCC to 4-length FD-OCC.

According to the method 400 of the embodiment of the present application, the network device can respectively indicate different DMRS configuration information by sending multiple DCI signaling, so as to realize switching between 2-length FD-OCC and 4-length FD-OCC.

The method 200 will be described in detail below in conjunction with the method 500 . In the method 500, the DMRS port table can be jointly indicated by the DMRS type information and the DMRS configuration information, and the network device can send different DCI signaling to realize switching between different DMRS port tables, thereby realizing the switching between the R15 port and the R18 port. Switching, and/or switching of 2-length FD-OCC and 4-length FD-OCC. As shown in FIG. 5, the method 500 specifically includes:

S501. The network device sends RRC signaling to the terminal device. Correspondingly, the terminal equipment receives the RRC signaling.

This process is the same as S401, for details, please refer to the description in S401.

S502. The network device sends DCI signaling to the terminal device. Correspondingly, the terminal device receives the DCI signaling from the network device.

This process is the same as S402, for details, please refer to the description in S402.

S503. The terminal device determines first DMRS configuration information from at least one piece of DMRS configuration information according to the DCI signaling, where the first DMRS configuration information corresponds to first time domain resource allocation information.

For this process, refer to S203.

S504. The terminal device determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information.

Specifically, the terminal device determines the antenna port table (or called the DMRS port table) according to the DMRS type information, the first DMRS configuration information and the "maxLength" parameter, and the antenna port table includes multiple antenna port index groups and multiple Correspondence between indexes.

The following describes S504 according to different situations.

Case 1:

The DMRS type information indicates the first DMRS type (type1) or the third DMRS type (type1-E), and is a single symbol.

The situation 1 can be further divided into two implementation manners, and the two implementation manners will be described respectively below.

A first implementation manner: the antenna port table determined by the terminal device may be one of the following table A1, table B1 and table C1.

It should be understood that in R15, a type1 single symbol corresponds to four R15 ports. In R18, eight R18 ports can be obtained by enhancing the type1 single symbol. Table A1 includes the first 4 ports of the 8 R18 ports, and the FD-OCC length corresponding to the port is 4. Table B1 includes the 8 R18 ports, and the FD-OCC length corresponding to the ports is 4. The 4 R15 ports are included in Table C1.

Table A1 (both are R15): DMRS type information indicates the first DMRS type, and the first DMRS configuration information indicates the first value, single symbol. The set of antenna port index groups corresponding to Table A1 may be recorded as the first set of antenna port index groups #1.

Table B1 (both are R18): DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the second value, and is a single symbol. The set of antenna port index groups corresponding to Table B1 may be recorded as the second set of antenna port index groups #1.

Table C1 (one R15, one R18): DMRS type information indicates the first DMRS type, the first DMRS configuration information indicates the second value, and is a single symbol. Or, the DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the first value, and is a single symbol. The set of antenna port index groups corresponding to Table C1 may be recorded as a third set of antenna port index groups #1.

The second implementation manner: the antenna port table determined by the terminal device may be one of the following table A2, table B2 and table C2.

It should be understood that in R15, a type1 single symbol corresponds to four R15 ports. In R18, eight R18 ports can be obtained by enhancing the type1 single symbol. Table A2 includes the four R15 ports, and the FD-OCC length corresponding to the ports is 2. Table B2 includes the last 4 R18 ports (ie, extended ports) among the 8 R18 ports, and the FD-OCC length corresponding to the ports is 4. The 8 R18 ports are included in Table C2.

Table A2 (both are R15): DMRS type information indicates the first DMRS type, and the first DMRS configuration information indicates the first value, single symbol. The set of antenna port index groups corresponding to Table A2 may be recorded as the first set of antenna port index groups #2.

Table B2 (both are R18): DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the second value, and is a single symbol. The set of antenna port index groups corresponding to Table B2 may be recorded as the second set of antenna port index groups #2.

Table C2 (one R15, one R18): DMRS type information indicates the first DMRS type, the first DMRS configuration information indicates the second value, and is a single symbol. Or, the DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the first value, and is a single symbol. The set of antenna port index groups corresponding to Table C2 may be recorded as a third set of antenna port index groups #2.

Case 2:

The DMRS type information indicates the first DMRS type (type1) or the third DMRS type (type1-E), and is a double symbol.

The case 2 can be further divided into two implementation manners, and the two implementation manners will be described respectively below.

A first implementation manner: the antenna port table determined by the terminal device may be one of the following table A3, table B3 and table C3.

It should be understood that in R15, type1 double symbols correspond to 8 R15 ports. In R18, 16 R18 ports can be obtained by enhancing type1 double symbols. Table A3 includes the first 8 ports among the 16 R18 ports (that is, ports before expansion), and the FD-OCC length corresponding to the ports is 4. Table B3 includes the 16 R18 ports, and the FD-OCC length corresponding to the ports is 4. Table C3 includes the 8 R15 ports, and the FD-OCC length corresponding to the ports is 2.

Table A3 (both are R15): DMRS type information indicates the first DMRS type, the first DMRS configuration information indicates the first value, double symbols. The set of antenna port index groups corresponding to Table A3 may be recorded as the first set of antenna port index groups #3.

Table B3 (both are R18): DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the second value, double symbols. The set of antenna port index groups corresponding to Table B3 may be recorded as the second set of antenna port index groups #3.

Table C3 (one R15, one R18): DMRS type information indicates the first DMRS type, and the first DMRS configuration information indicates the second value, double symbols. Or, the DMRS type information indicates the third DMRS type, and the first DMRS configuration information indicates the first value, double symbol. The set of antenna port index groups corresponding to Table C3 may be recorded as the third set of antenna port index groups #3.

The second implementation manner: the antenna port table determined by the terminal device may be one of the following table A4, table B4 and table C4.

It should be understood that in R15, type1 double symbols correspond to 8 R15 ports. In R18, 16 R18 ports can be obtained by enhancing type1 double symbols. Table A4 includes the 8 R15 ports, and the FD-OCC length corresponding to the ports is 2. Table B4 includes the last 8 R18 ports (ie, extended ports) among the 16 R18 ports, and the FD-OCC length corresponding to the ports is 4. Table C4 includes the 16 R18 ports, and the FD-OCC length corresponding to the ports is 4.

Table A4 (both are R15): DMRS type information indicates the first DMRS type, the first DMRS configuration information indicates the first value, double symbols. The set of antenna port index groups corresponding to Table A4 may be recorded as the first set of antenna port index groups #4.

Table B4 (both are R18): DMRS type information indicates the third DMRS type, the first DMRS configuration information indicates the second value, double symbols. The set of antenna port index groups corresponding to Table B4 may be recorded as the second set of antenna port index groups #4.

Table C4 (one R15, one R18): DMRS type information indicates the first DMRS type, and the first DMRS configuration information indicates the second value, double symbols. Or, the DMRS type information indicates the third DMRS type, and the first DMRS configuration information indicates the first value, double symbol. The set of antenna port index groups corresponding to Table C4 may be recorded as the third set of antenna port index groups #4.

Case 3:

The DMRS type information indicates the second DMRS type or the fourth DMRS type, and is a single symbol.

The situation 3 can be further divided into two implementation manners, and the two implementation manners will be described respectively below.

A first implementation manner: the antenna port table determined by the terminal device may be one of the following table A5, table B5 and table C5.

It should be understood that in R15, a type2 single symbol corresponds to 6 R15 ports. In R18, 12 R18 ports can be obtained by enhancing the type2 single symbol. Table A5 includes the first 6 ports (ie, ports before expansion) of the 12 R18 ports, and the FD-OCC length corresponding to the ports is 4. Table B5 includes the 12 R18 ports, and the FD-OCC length corresponding to the ports is 4. Table C5 includes the 6 R15 ports, and the FD-OCC length corresponding to the ports is 2.

Table A5 (both are R15): DMRS type information indicates the second DMRS type, the first DMRS configuration information indicates the first value, single symbol. The set of antenna port index groups corresponding to Table A5 may be recorded as the first set of antenna port index groups #5.

Table B5 (both are R18): DMRS type information indicates the fourth DMRS type, the first DMRS configuration information indicates the second value, single symbol. The set of antenna port index groups corresponding to Table B5 may be recorded as the second set of antenna port index groups #5.

Table C5 (one R15, one R18): DMRS type information indicates the second DMRS type, and the first DMRS configuration information indicates the second value, single symbol; or, the DMRS type information indicates the fourth DMRS type, and the first DMRS configuration information indicates the first One value, single symbol. The set of antenna port index groups corresponding to Table C5 may be recorded as the third set of antenna port index groups #5.

The second implementation manner: the antenna port table determined by the terminal device may be one of the following table A6, table B6 and table C6.

It should be understood that in R15, a type2 single symbol corresponds to 6 R15 ports. In R18, 12 R18 ports can be obtained by enhancing the type2 single symbol. Table A6 includes the 6 R15 ports, and the FD-OCC length corresponding to the ports is 2. Table B6 includes the last 6 R18 ports (ie, extended ports) among the 12 R18 ports, and the FD-OCC length corresponding to the ports is 4. The 12 R18 ports are included in Table C6.

Table A6 (both are R15): DMRS type information indicates the second DMRS type, the first DMRS configuration information indicates the first value, single symbol. The set of antenna port index groups corresponding to Table A6 may be recorded as the first set of antenna port index groups #6.

Table B6 (both are R18): DMRS type information indicates the fourth DMRS type, the first DMRS configuration information indicates the second value, single symbol. The set of antenna port index groups corresponding to Table B6 may be recorded as the second set of antenna port index groups #6.

Table C6 (one R15, one R18): DMRS type information indicates the second DMRS type, and the first DMRS configuration information indicates the second value, single symbol; or, the DMRS type information indicates the fourth DMRS type, and the first DMRS configuration information indicates the first One value, single symbol. The set of antenna port index groups corresponding to Table C6 may be recorded as the third set of antenna port index groups #6.

Case 4:

The DMRS type information indicates the second DMRS type (type2) or the fourth DMRS type (type2-E), and is a double symbol.

The case 4 can be further divided into two implementation manners, and the two implementation manners will be described respectively below.

A first implementation manner: the antenna port table determined by the terminal device may be one of the following table A7, table B7 and table C7.

It should be understood that in R15, type2 double symbols correspond to 12 R15 ports. In R18, 24 R18 ports can be obtained by enhancing type2 double symbols. Table A7 includes the first 12 ports of the 24 R18 ports, and the FD-OCC length corresponding to the ports is 4. Table B7 includes the 24 R18 ports, and the FD-OCC length corresponding to the ports is 4. The 12 R15 ports are included in Table C7.

Table A7 (both are R15): DMRS type information indicates the second DMRS type, the first DMRS configuration information indicates the first value, double symbols. The set of antenna port index groups corresponding to Table A7 may be recorded as the first set of antenna port index groups #7.

Table B7-1 and Table B7-2 (both are R18): the DMRS type information indicates the fourth DMRS type, the first DMRS configuration information indicates the second value, double symbols. The set of antenna port index groups corresponding to Table B7-1 can be recorded as the second set of antenna port index groups #7. The antenna port index group set corresponding to Table B7-2 can be recorded as the second antenna port index group set #8.

Table B7-1:

Table B7-2

Table C7 (one R15, one R18): DMRS type information indicates the second DMRS type, and the first DMRS configuration information indicates the second value, double symbols; or, the DMRS type information indicates the fourth DMRS type, and the first DMRS configuration information indicates the first One value, double sign. The set of antenna port index groups corresponding to Table C7 may be recorded as the third set of antenna port index groups #7.

The second implementation manner: the antenna port table determined by the terminal device may be one of the following table A8, table B8 and table C8.

It should be understood that in R15, type2 double symbols correspond to 12 R15 ports. In R18, 24 R18 ports can be obtained by enhancing type2 double symbols. Table A8 includes the 12 R15 ports, and the FD-OCC length corresponding to the ports is 2. Table B8 includes the last 12 R18 ports (ie, extended ports) among the 24 R18 ports, and the FD-OCC length corresponding to the ports is 4. The 24 R18 ports are included in Table C8.

Table A8 (both are R15): DMRS type information indicates the second DMRS type, the first DMRS configuration information indicates the first value, double symbols. The set of antenna port index groups corresponding to Table A8 may be recorded as the first set of antenna port index groups #8.

Table B8 (both are R18): DMRS type information indicates the fourth DMRS type, the first DMRS configuration information indicates the second value, double symbols. The set of antenna port index groups corresponding to Table B8 can be recorded as the second set of antenna port index groups #9.

Table C8-1 and Table C8-2 (one R15, one R18): DMRS type information indicates the second DMRS type, the first DMRS configuration information indicates the second value, double symbols; or, the DMRS type information indicates the fourth DMRS type, The first DMRS configuration information indicates a first value, double symbols. The set of antenna port index groups corresponding to Table C8-1 can be recorded as the third set of antenna port index groups #8. The set of antenna port index groups corresponding to Table C8-2 may be recorded as the third set of antenna port index groups #9.

Table C8-1:

Table C8-2:

S505. The terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

Optionally, the terminal device may also determine the number of CDM groups that do not transmit data on the symbol where the DMRS is located.

According to the method 500 of the embodiment of the present application, the terminal device can flexibly switch the antenna port table according to the DMRS configuration information indicated by the DCI signaling, so as to realize the switching between the R15 port and the R18 port, and/or, 2 long FD-OCC and 4 Handover of long FD-OCC.

The method 200 will be described in detail below in conjunction with the method 600 . In the method 600, the DMRS type information configured by the RRC signaling and the DMRS configuration information may jointly indicate the FD-OCC length of the port, and different DCI signaling may be used to switch between the R15 port and the R18 port, and/or, Switching between 2-long FD-OCC and 4-long FD-OCC. As shown in FIG. 6, the method 600 specifically includes:

S601. The network device sends RRC signaling to the terminal device. Correspondingly, the terminal equipment receives the RRC signaling.

This process is the same as S401, for details, please refer to the description in S401.

S602. The network device sends DCI signaling to the terminal device. Correspondingly, the terminal device receives the DCI signaling from the network device.

This process is the same as S402, for details, please refer to the description in S402.

S603. The terminal device determines first DMRS configuration information from at least one piece of DMRS configuration information according to the DCI signaling, where the first DMRS configuration information corresponds to first time domain resource allocation information.

For this process, refer to S203.

S604. The terminal device determines multiple sets of antenna port index groups according to the DMRS type information.

Specifically, the terminal device determines the antenna port table (or called the DMRS port table) according to the DMRS type information and the "maxLength" parameter, and the antenna port table includes multiple antenna port index groups and correspondence between multiple indices .

The following describes S604 according to different situations.

Case 1:

When the DMRS type information indicates the first DMRS type or the third DMRS type and is a single symbol, the antenna port table determined by the terminal device may be as shown in Table D1. It should be understood that Table A1, Table B1 and Table C1 in S504 are part of Table D1 respectively. Similarly, table A2, table B2 and table C2 in S504 are part of table D1 respectively. Table D1:

Case 2:

When the DMRS type information indicates the first DMRS type or the third DMRS type and is double symbols, the antenna port table determined by the terminal device may be as shown in Table D2. It should be understood that Table A3, Table B3 and Table C3 in S504 are part of Table D2 respectively. Similarly, table A4, table B4 and table C4 in S504 are part of table D2 respectively.

Form D2:

Case 3:

When the DMRS type information indicates the second DMRS type or the fourth DMRS type and is a single symbol, the antenna port table determined by the terminal device may be as shown in Table D3. It should be understood that Table A5, Table B5 and Table C5 in S504 are part of Table D3 respectively. Similarly, table A6, table B6 and table C6 in S504 are part of table D3 respectively.

Table D3:

When the DMRS type information indicates the second DMRS type or the fourth DMRS type and is double symbols, the antenna port table determined by the terminal device may be as shown in Table D4-1 or Table D4-2.

Table D4-1:

Table D4-2:

Each of the above tables D1 to D4 includes one or more of the following features. Take Table D1 as an example for illustration.

Feature 1:

Among the multiple antenna port index groups included in Table D1, there are certain two antenna port index groups, and the two antenna port index groups both include the same port (denoted as port #A), but port #A is between the two antennas. The FD-OCCs corresponding to the port index groups have different lengths.

For example, port 0 corresponding to "index=29" in table D1 is FD-OCC2 long, and port 0 corresponding to "index=0" is FD-OCC4 long.

Feature 2:

There are two ports (denoted as port #B and port #C) in the multiple antenna port index groups included in Table D1, the port #B and port #C are in the same CDM group, and port #B is an R15 port , Port #C is the R18 port.

For example, "index=40" in Table D1 indicates port combinations corresponding to 2 long non-orthogonal sequences in 4-length orthogonal sequences.

Feature 3:

There is an antenna port index group among the multiple antenna port index groups included in Table D1, and the antenna port index group includes port #D and port #E, but the FD-OCC length corresponding to port #D is the same as the length of the FD-OCC corresponding to port #E. FD-OCC lengths are different.

For example, for the antenna port index group "0(FD-OCC2),1,9" corresponding to "index=42" in Table D1, the FD-OCC length corresponding to port 0 is 2, and the FD-OCC length corresponding to port 9 is for 4.

Feature 4:

All mandatory combinations of R18 ports are included in Table D1.

Feature 5:

Table D1 includes all combinations of R15 ports. Alternatively, all combinations of R15 ports are not included in Table D1.

S605. The terminal device determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

Optionally, the terminal device may also determine the number of CDM groups that do not transmit data on the symbol where the DMRS is located.

S606. The terminal device determines a frequency domain mask length corresponding to a port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates the first value, the length of the frequency domain mask corresponding to the port in the first antenna port index group is 2.

When the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates the second value, the length of the frequency domain mask corresponding to the port in the first antenna port index group is 4.

When the DMRS type information indicates the third DMRS type or the fourth DMRS type, and the first DMRS configuration information indicates the first value, the length of the frequency domain mask corresponding to the port in the first antenna port index group is 2.

When the DMRS type information indicates the first DMRS type or the second DMRS type, and the first DMRS configuration information indicates the second value, the first antenna port index group includes a port with a frequency domain mask length of 2 and a frequency domain mask length for 4 ports. In other words, the FD-OCC length of the port defined in R15 in the first antenna port index group is 2, and the FD-OCC length of the newly added port in R18 is 4.

According to the method 600 of the embodiment of the present application, the network device can send different DCI signaling to indicate different DMRS configuration information, so as to realize the switching of the FD-OCC length.

According to the foregoing method, FIG. 7 shows a communication device provided in an embodiment of the present application, where the communication device includes a transceiver unit 701 and a processing unit 702 .

Wherein, the transceiving unit 701 may be used to implement a corresponding information transceiving function. The transceiver unit 701 may also be called a communication interface or a communication unit. The processing unit 702 may be configured to perform processing operations.

Exemplarily, the device further includes a storage unit, which can be used to store instructions and/or data, and the processing unit 702 can read the instructions and/or data in the storage unit, so that the device implements the above-mentioned method embodiments. action of the device.

As a first implementation manner, the apparatus may be the terminal device in the foregoing embodiments, or may be a component (such as a chip) of the terminal device. Wherein, the transceiver unit and the processing unit may be used to implement related operations of the terminal device in each method embodiment above. Exemplarily, the transceiver unit is used to implement S201 and S202, and the processing unit is used to implement S203. Alternatively, the transceiver unit is used to implement S301 and S302, and the processing unit is used to implement S303, S304 and S305. Alternatively, the transceiver unit is used to implement S401 and S402, and the processing unit is used to implement S403, S404, S405 and S406. Alternatively, the transceiver unit is used to implement S501 and S502, and the processing unit is used to implement S503, S504, and S505. Alternatively, the transceiver unit is used to implement S601 and S602, and the processing unit is used to implement S603, S604, S605 and S606.

As a second implementation manner, the apparatus may be the network device in the foregoing embodiments, or may be a component (such as a chip) of the network device. Wherein, the transceiver unit and the processing unit may be used to implement related operations of the network device in each method embodiment above. Exemplarily, the transceiver unit is used to implement S201 and S202. Alternatively, the transceiver unit is used to implement S301 and S302. Alternatively, the transceiver unit is used to implement S401 and S402. Alternatively, the transceiver unit is used to implement S501 and S502. Alternatively, the transceiver unit is used to implement S601 and S602.

It should be understood that the specific process of each unit performing the above corresponding steps has been described in detail in the above method embodiments, and for the sake of brevity, details are not repeated here.

The transceiver unit can be replaced by a transceiver (for example, the sending unit in the transceiver unit can be replaced by a transmitter, and the receiving unit in the transceiver unit can be replaced by a receiver), and other units, such as a processing unit, can be replaced by a processor, respectively. Transmitting and receiving operations and related processing operations in each method embodiment.

In addition, the above-mentioned transceiver unit 701 may also be a transceiver circuit (for example, may include a receiving circuit and a sending circuit), and the processing unit may be a processing circuit.

It should be understood that the device in FIG. 7 may be the device in the foregoing method embodiment, or may be a chip or a chip system, for example, a system on chip (system on chip, SoC). Wherein, the transceiver unit may be an input-output circuit or a communication interface; the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip. It is not limited here.

The embodiment of the present application also provides a communication device, as shown in FIG. 8 , including: a processor 801 and a communication interface 802 . The processor 801 is configured to execute computer programs or instructions stored in the memory 803, or read data stored in the memory 803, so as to execute the methods in the above method embodiments. Exemplarily, there are one or more processors 801 . The communication interface 802 is used for receiving and/or sending signals. For example, the processor 801 is configured to control the communication interface 802 to receive and/or send signals.

Exemplarily, as shown in FIG. 8 , the communication device may further include a memory 803 for storing computer programs or instructions and/or data. The memory 803 can be integrated with the processor 801, or can also be set separately. Of course, the communication device may not include the memory 803, and the memory 803 is set outside the communication device. Exemplarily, there may be one or more memories 803 .

Exemplarily, the processor 801, the communication interface 802, and the memory 803 are interconnected via a bus 804; the bus 804 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA ) bus, etc. The above-mentioned bus 804 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 8 , but it does not mean that there is only one bus or one type of bus.

As a first implementation manner, the apparatus may be the terminal device in the foregoing embodiments, or may be a component (such as a chip) of the terminal device. Wherein, the communication interface and the processor may be used to implement related operations of the terminal device in each method embodiment above. Exemplarily, the communication interface is used to implement S201 and S202, and the processor is used to implement S203. Alternatively, the communication interface is used to implement S301 and S302, and the processor is used to implement S303, S304, and S305. Alternatively, the communication interface is used to implement S401 and S402, and the processor is used to implement S403, S404, S405, and S406. Alternatively, the communication interface is used to implement S501 and S502, and the processor is used to implement S503, S504, and S505. Alternatively, the communication interface is used to implement S601 and S602, and the processor is used to implement S603, S604, S605, and S606.

As a second implementation manner, the apparatus may be the network device in the foregoing embodiments, or may be a component (such as a chip) of the network device. Wherein, the communication interface and the processor may be used to implement related operations of the network device in each method embodiment above. Exemplarily, the communication interface is used to implement S201 and S202. Alternatively, the communication interface is used to implement S301 and S302. Alternatively, the communication interface is used to implement S401 and S402. Alternatively, the communication interface is used to implement S501 and S502. Alternatively, the communication interface is used to implement S601 and S602.

It should be understood that the processor (such as the processor 801) mentioned in the embodiment of the present application may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP), or a combination of CPU and NP. The processor may further include hardware chips. The aforementioned hardware chip may be an application specific integrated circuit (application specific integrated circuit, ASIC) or a programmable logic device (programmable logic device, PLD). The aforementioned PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL) or any combination thereof.

It should also be understood that the memory (such as the memory 803 ) mentioned in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. Among them, the non-volatile memory can be read-only memory (read-only memory, ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically programmable Erase programmable read-only memory (electricallyEPROM, EEPROM) or flash memory. Volatile memory can be random access memory (RAM), which acts as external cache memory.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In several embodiments provided in this application, the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative, and the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, each functional unit in each embodiment of the present application may be integrated into one unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

If the embodiments of the present application are implemented in the form of software and sold or used as an independent product, the corresponding computer program (also called code, or instruction) can be stored in a computer-readable storage medium. The present application provides a computer-readable storage medium, including a computer program. When the computer program is run on a computer, the computer is made to execute any possible implementation in the foregoing method embodiments.

The computer-readable storage medium includes: various mediums capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

The technical solutions of this application can be embodied in the form of software products. Therefore, the present application also provides a computer program product, the computer program product including: a computer program, when the computer program is executed, the computer is made to perform any possible implementation in the foregoing method embodiments.

In addition, the embodiment of the present application further provides a chip system (or chip). The chip system includes logic circuits and input/output interfaces.

Wherein, the logic circuit may be a processing circuit in the chip system. The logic circuit can be coupled and connected to the storage unit, and call the instructions in the storage unit, so that the chip system can realize the methods and functions of the various embodiments of the present application. The input/output interface may be an input/output circuit in the chip system, which outputs information processed by the chip system, or inputs data or signaling information to be processed into the chip system for processing.

The above is only the specific implementation of the application, but the scope of protection of the application is not limited thereto. Anyone familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the application, and should cover Within the protection scope of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (27)

1. A method of communication, comprising:

the method comprises the steps that terminal equipment obtains at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, wherein the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information;

the terminal equipment receives a Downlink Control Information (DCI) signaling from the network equipment, wherein the DCI signaling comprises a first index, the first index is used for indicating first time domain resource allocation information, and the first time domain resource allocation information is one of the at least one time domain resource allocation information;

and the terminal equipment determines first DMRS configuration information from the at least one DMRS configuration information according to the DCI signaling, wherein the first DMRS configuration information corresponds to the first time domain resource allocation information.

2. The method of claim 1,

the terminal device obtaining the at least one time domain resource allocation information and the at least one DMRS configuration information, including:

and the terminal equipment receives Radio Resource Control (RRC) signaling from the network equipment, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, and the TDRA field is used for configuring the at least one piece of time domain resource allocation information and the at least one piece of DMRS configuration information.

3. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first type and a second type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information;

and the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

4. The method of claim 3,

when the DMRS type information indicates the first type and the first DMRS configuration information indicates a first value, corresponding to a first DMRS type;

when the DMRS type information indicates the second type and the first DMRS configuration information indicates a first value, corresponding to a second DMRS type;

when the DMRS type information indicates the first type and the first DMRS configuration information indicates a second value, corresponding to a third DMRS type;

and when the DMRS type information indicates the second type and the first DMRS configuration information indicates a second value, corresponding to a fourth DMRS type.

5. The method according to any one of claims 3 to 4,

when the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

6. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information;

the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information;

and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the first DMRS configuration information.

7. The method of claim 6,

when the DMRS type information indicates the first DMRS type or the second DMRS type, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

8. The method according to any one of claims 6 to 7,

the determining, by the terminal device, the frequency domain mask length of the port in the first antenna port index group includes:

when the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2;

and when the first DMRS configuration information indicates a second value, the terminal equipment determines that the frequency domain mask length corresponding to the port in the first antenna port index group is 4.

9. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information and the first DMRS configuration information;

and the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information.

10. The method of claim 9,

the set of antenna port index groups satisfies any one of:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port index groups is a first set of antenna port index groups;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the set of antenna port index groups is a second set of antenna port index groups;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value; or, when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, the set of antenna port indices is a third set of antenna port indices.

11. The method according to any one of claims 9 to 10,

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports.

12. The method according to any one of claims 9 to 10,

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a first set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, ports in the set of antenna port index groups belong to a subset of a second set of DMRS ports;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a second value, a port in the set of antenna port index groups belongs to a second set of DMRS ports;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a first value, a port in the set of antenna port index groups belongs to a second set of DMRS ports.

13. The method of claim 2,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information;

the method further comprises the following steps:

the terminal equipment determines an antenna port index group set according to the DMRS type information;

the terminal equipment determines a first antenna port index group from the antenna port index group set according to the antenna port indication information;

and the terminal equipment determines the frequency domain mask length corresponding to the port in the first antenna port index group according to the DMRS type information and the first DMRS configuration information.

14. The method of claim 13,

the antenna port index set comprises a second antenna port index set and a third antenna port index set, and the frequency domain mask length of the first port in the second antenna port index set is different from the frequency domain mask length of the first port in the third antenna port index set.

15. The method according to claim 13 or 14,

the antenna port index group set comprises a second port and a third port, the second port and the third port are in the same CDM group, the second port is a port in the first DMRS port set, and the third port is a port in the second DMRS port set.

16. The method according to any one of claims 13 to 15,

the antenna port index group set comprises a fourth antenna port index group, the fourth antenna port index group comprises a fourth port and a fifth port, and the frequency domain mask length corresponding to the fourth port is different from the frequency domain mask length corresponding to the fifth port.

17. The method of any one of claims 13-16,

the determining, by the terminal device, a frequency domain mask length corresponding to a port in the first antenna port combination includes:

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates a first value, the terminal device determines that the frequency domain mask length corresponding to a port in the first antenna port index group is 2;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates a second value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 4;

when the DMRS type information indicates the third DMRS type or the fourth DMRS type and the first DMRS configuration information indicates the first value, the terminal device determines that a frequency domain mask length corresponding to a port in the first antenna port index group is 2;

when the DMRS type information indicates the first DMRS type or the second DMRS type and the first DMRS configuration information indicates the second value, the terminal device determines that the first antenna port index group includes a port with a frequency domain mask length of 2 and a port with a frequency domain mask length of 4.

18. The method of any one of claims 5, 7, 11, 12, 15,

the frequency domain mask length corresponding to the ports in the first DMRS port set is 2, and the frequency domain mask length corresponding to the ports in the second DMRS port set is 4.

19. The method according to any one of claims 3, 6, 9, 13,

the antenna port index set comprises a plurality of antenna port index sets, wherein the plurality of antenna port index sets are corresponding to a plurality of indexes, and the antenna port indication information is used for indicating one index in the plurality of indexes.

20. A method of communication, comprising:

the method comprises the steps that network equipment sends Radio Resource Control (RRC) signaling to terminal equipment, wherein the RRC signaling comprises a Time Domain Resource Allocation (TDRA) field, the TDRA field is used for configuring at least one piece of time domain resource allocation information and at least one piece of demodulation reference signal (DMRS) configuration information, and the at least one piece of time domain resource allocation information corresponds to the at least one piece of DMRS configuration information;

the network device sends a Downlink Control Information (DCI) signaling to the terminal device, where the DCI signaling includes a first index, and the first index is used to indicate first time domain resource allocation information, where the first time domain resource allocation information is one of the at least one time domain resource allocation information.

21. The method of claim 20,

the first time domain resource allocation information corresponds to first DMRS configuration information;

the first DMRS configuration information indicates a first value corresponding to any one of: the frequency domain mask length of the DMRS port is 2, and the protocol version is r15;

or,

the first DMRS configuration information indicates a second value corresponding to any one of: the frequency domain mask length of the DMRS port is 4, and the protocol version is r18.

22. The method of claim 20 or 21,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first type and a second type, and the DCI signaling further comprises antenna port indication information.

23. The method of claim 20 or 21,

the RRC signaling further comprises DMRS type information, the DMRS type information indicates any one of a first DMRS type, a second DMRS type, a third DMRS type and a fourth DMRS type, and the DCI signaling further comprises antenna port indication information.

24. A communications device comprising means for performing the method of any of claims 1-23.

25. A communications apparatus, comprising: a communication interface and a processor for executing a computer program or instructions causing the communication device to perform the method of any of claims 1-23.

26. A computer-readable storage medium comprising a computer program or instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-23.

27. A computer program product comprising instructions which, when run on a computer, cause the computer to perform the method of any one of claims 1-23.

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