WO2022253166A1

WO2022253166A1 - Communication method and apparatus

Info

Publication number: WO2022253166A1
Application number: PCT/CN2022/095897
Authority: WO
Inventors: 宣一荻; 谢信乾; 郭志恒
Original assignee: 华为技术有限公司
Priority date: 2021-05-31
Filing date: 2022-05-30
Publication date: 2022-12-08
Also published as: CN115484006A

Abstract

The present application provides a communication method and apparatus. The method comprises: a terminal device receives first indication information from a network device, the first indication information being used for indicating that first time-frequency resources do not carry a demodulation reference signal (DMRS), or that time-frequency resources corresponding to some frequency domain resources in first time-frequency resources do not carry a DMRS, and the terminal device receiving a data signal on the first time-frequency resources; the terminal device obtains DMRS information associated with the data signal, and demodulates the data signal according to the DMRS information. In the method provided by the present application, the indication information is used for indicating that the first time-frequency resources do not carry a DMRS, or that time-frequency resources corresponding to some frequency domain resources in the first time-frequency resources do not carry a DMRS, thereby realizing flexible configuration of the DMRS, reducing the overhead of the DMRS, saving resources for data transmission, and improving the efficiency of data transmission.

Description

A communication method and device

This application claims the priority of the Chinese patent application with the application number 202110602670.0 and the application name "A Communication Method and Device" submitted to the China Patent Office on May 31, 2021, the entire contents of which are incorporated in this application by reference .

technical field

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

Background technique

In a wireless communication system, in order to obtain the transmitted data correctly, the terminal device needs to rely on the demodulation reference signal (DMRS) to obtain the channel coefficient of the transmission channel, so as to perform channel estimation to correctly demodulate the transmitted data.

Currently, when the network device transmits downlink data to the terminal device, the downlink control information (downlink control information, DCI) sent by the network device includes DMRS in each time slot. In the access scenario, since the channels are basically the same in multiple consecutive time slots, if each downlink signal scheduled by the DCI includes a DMRS, the transmission overhead of the DMRS will be too large. Therefore, how to realize the flexible indication of DMRS through downlink control information (DCI) according to the time-frequency resource configuration of DMRS when the DMRS is no longer configured in some time slots, and how to demodulate data is an urgent problem to be solved. question.

Contents of the invention

The present application provides a communication method and device, which can realize flexible configuration and indication of DMRS, and further reduce the overhead of DMRS.

In a first aspect, a communication method is provided, and the method may be executed by a terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in the present application. The method includes: the terminal device receives first indication information from the network device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0, or The first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0, where the first time-frequency resource includes at least one first time slot in the time domain ; The terminal device receives a data signal on the first time-frequency resource, and the first time-frequency resource does not carry a DMRS.

Based on the above solution, the flexible configuration of the DMRS can be realized by indicating that the current time-frequency resource does not carry the DMRS through the indication information, thereby reducing the overhead of the DMRS.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device acquires at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, and the second time-frequency resource is in the time domain Including at least one second time slot, the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, and the at least one second time slot is the same as the at least one first time slot In one uplink and downlink time slot configuration period; the terminal device demodulates the data signal according to the at least one DMRS.

Based on the above solution, by acquiring the DMRS related to the data carried on the first time-frequency resource, when the DMRS is not carried on the first time-frequency resource, the demodulation of the data signal on the first time-frequency resource can be realized.

With reference to the first aspect, in some implementation manners of the first aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the first aspect, in some implementation manners of the first aspect, the terminal device receives downlink control information, and the downlink control information is used to schedule the terminal device to receive the at least one DMRS.

With reference to the first aspect, in some implementation manners of the first aspect, the first indication information is further used to indicate at least one DMRS port, and the at least one DMRS port is related to the data signal carried on the first time-frequency resource. Association: the terminal device obtains at least one DMRS of the at least one DMRS port.

In a second aspect, a communication method is provided, and the method may be executed by a terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in the present application. The method includes: the terminal device receives first indication information from a network device, where the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources does not bear DMRS, and the first The frequency domain resource is a part of the first time-frequency resource, where the first time-frequency resource includes at least one first time slot in the time domain; the terminal device on the first time-frequency resource Receive data signal.

Based on the above solution, the flexible configuration of the DMRS can be implemented by indicating that the time-frequency resources corresponding to some frequency domain resources do not bear DMRS, thereby reducing the overhead of the DMRS.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device acquires at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, and the second time-frequency resource is in the time domain Including at least one second time slot, the frequency domain resource of the second time-frequency resource is the same as the first frequency domain resource, and the at least one second time slot and the at least one first time slot are in the same uplink and downlink Within a time slot configuration period: the terminal device demodulates a data signal corresponding to a first frequency domain resource in the data signal according to the at least one DMRS.

Based on the above solution, by acquiring the DMRS related to the data carried on the first time-frequency resource, when the DMRS is not carried on part of the frequency domain resources of the first time-frequency resource, the data signal on the first time-frequency resource can be realized demodulation.

With reference to the second aspect, in some implementation manners of the second aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device receives downlink control information, and the downlink control information is used to schedule the terminal device to receive the at least one DMRS.

With reference to the second aspect, in some implementation manners of the second aspect, the terminal device receives second indication information, where the second indication information is used to indicate at least one DMRS port, and the at least one DMRS port is related to the first Association of data signals carried on a time-frequency resource; the terminal device acquires at least one DMRS of the at least one DMRS port.

In a third aspect, a communication method is provided, and the method may be executed by a terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in the present application. The method includes: the terminal device receives first indication information from the network device, the first indication information is used to indicate that the DMRS is not carried on the first time-frequency resource, and the first indication information is also used to indicate the second time slot, Wherein, the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the DMRS carried on the first time-frequency resource. The data signal is associated, the second time-frequency resource includes the second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, so The second time slot and the first time slot are within an uplink and downlink time slot configuration period; the terminal device receives a data signal on the first time-frequency resource.

With reference to the third aspect, in some implementation manners of the third aspect, the terminal device obtains the DMRS carried on the second time-frequency resource; The data information is demodulated.

With reference to the third aspect, in some implementation manners of the third aspect, the second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.

In a fourth aspect, a communication method is provided, and the method may be executed by a network device, or may also be executed by a chip or a circuit configured in the network device, which is not limited in the present application. The method includes: the network device sends first indication information to the terminal device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0, or, The first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0, where the first time-frequency resource includes at least one first time slot in the time domain; The network device sends a data signal on the first time-frequency resource.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the network device sends at least one DMRS to the terminal device, the at least one DMRS is used to demodulate the data signal, and the at least one DMRS carries On the second time-frequency resource, the second time-frequency resource includes at least one second time slot in the time domain, the frequency domain resource of the second time-frequency resource and the frequency domain resource of the first time-frequency resource Similarly, the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the network device sends downlink control information to the terminal device, where the downlink control information is used to schedule the terminal device in the second time slot The at least one DMRS is received.

With reference to the fourth aspect, in some implementation manners of the fourth aspect, the first indication information is further used to indicate at least one DMRS port, and the at least one DMRS port is related to the data signal carried on the first time-frequency resource. Association: the network device sends at least one DMRS of the at least one DMRS port to the terminal device.

In a fifth aspect, a communication method is provided, and the method may be executed by a network device, or may also be executed by a chip or a circuit configured in the network device, which is not limited in the present application. The method includes: the network device sends first indication information to the terminal device, the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource in the first time-frequency resources does not bear DMRS, and the first frequency domain resource The domain resources are part of the frequency domain resources in the first time-frequency resource, where the first time-frequency resource includes at least one first time slot in the time domain; the network device sends on the first time-frequency resource data signal.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the method further includes: the network device sending at least one DMRS to the terminal device, and the at least one DMRS is used to demodulate the data signal The data signal corresponding to the first frequency domain resource, the at least one DMRS is carried on the second time frequency resource, the second time frequency resource includes at least one second time slot in the time domain, and the second time frequency resource The frequency domain resource is the same as the first frequency domain resource, and the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the fifth aspect, in some implementation manners of the fifth aspect, the method further includes: the network device sending downlink control information to the terminal device, where the downlink control information is used to schedule the terminal device to receiving the at least one DMRS in the second time slot.

With reference to the fifth aspect, in some implementations of the fifth aspect, the method further includes: the network device sending second indication information to the terminal device, where the second indication information is used to indicate at least one DMRS port , the at least one DMRS port is associated with the data signal carried on the first time-frequency resource; the network device sends at least one DMRS of the at least one DMRS port to the terminal device.

In a sixth aspect, a communication method is provided, and the method may be executed by a network device, or may also be executed by a chip or a circuit configured in the network device, which is not limited in the present application. The method includes: the network device sends first indication information to the terminal device, the first indication information is used to indicate that DMRS is not carried on the first time-frequency resource, and the first indication information is also used to indicate the second time slot, wherein , the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the data carried on the first time-frequency resource signal association, the second time-frequency resource includes the second time slot in the time domain, the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, and the The second time slot and the first time slot are within an uplink and downlink time slot configuration period; the network device sends a data signal on the first time-frequency resource.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the method further includes: the network device sending the DMRS carried on the second time-frequency resource to the terminal device.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.

In a seventh aspect, a communication device is provided, and the device may be a terminal device or a terminal device.

The device includes: a transceiver module, configured to receive first indication information from a network device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0, or, the first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0, where the first time-frequency resource includes at least one first time-frequency resource in the time domain A time slot: the transceiver module is further configured to receive a data signal on the first time-frequency resource, and the first time-frequency resource does not carry DMRS.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the first aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the apparatus further includes: a processing module configured to acquire at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, and the second The time-frequency resource includes at least one second time slot in the time domain, the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, and the at least one second time slot is the same as the frequency domain resource of the first time-frequency resource. The at least one first time slot is within one uplink and downlink time slot configuration period; the processing module is further configured to demodulate the data signal according to the at least one DMRS.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the transceiver module is further configured to receive downlink control information, and the downlink control information is used to schedule the transceiver module to receive in the second time slot The at least one DMRS.

With reference to the seventh aspect, in some implementation manners of the seventh aspect, the first indication information is further used to indicate at least one DMRS port, and the at least one DMRS port is related to the data signal carried on the first time-frequency resource. Associating, wherein the processing module is specifically configured to: acquire at least one DMRS of the at least one DMRS port.

In an eighth aspect, a communication device is provided, and the device may be a terminal device or a terminal device.

The device includes: a transceiver module, configured to receive first indication information from a network device, where the first indication information is used to indicate that the time-frequency resources corresponding to the first frequency domain resources in the first time-frequency resources do not bear DMRS, so The first frequency domain resource is part of the first time-frequency resource, wherein the first time-frequency resource includes at least one first time slot in the time domain; the transceiver module is further configured to: The data signal is received on the first time-frequency resource.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the second aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the apparatus further includes: a processing module configured to obtain at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, and the second The time-frequency resource includes at least one second time slot in the time domain, the frequency domain resource of the second time-frequency resource is the same as the first frequency domain resource, and the at least one second time slot is the same as the at least one first frequency domain resource. One time slot is within one uplink and downlink time slot configuration period; the processing module is further configured to demodulate the data signal corresponding to the first frequency domain resource in the data signal according to the at least one DMRS.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the transceiver module is further configured to receive downlink control information, and the downlink control information is used to schedule the transceiver module to receive in the second time slot The at least one DMRS.

With reference to the eighth aspect, in some implementation manners of the eighth aspect, the terminal device receives second indication information, where the second indication information is used to indicate at least one DMRS port, and the at least one DMRS port is related to the first The association of data signals carried on a time-frequency resource, wherein the processing module is specifically configured to: acquire at least one DMRS of the at least one DMRS port.

In a ninth aspect, a communication device is provided, and the device may be a terminal device or a terminal device.

The device includes: a transceiver module, configured to receive first indication information from a network device, the first indication information is used to indicate that no DMRS is carried on the first time-frequency resource, and the first indication information is also used to indicate the second A time slot, wherein the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the DMRS carried on the first time-frequency resource. associated with the data signal, the second time-frequency resource includes the second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource Similarly, the second time slot and the first time slot are within an uplink and downlink time slot configuration period; the transceiver module is further configured to receive data signals on the first time-frequency resource.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the third aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the apparatus further includes: a processing module, configured to obtain the DMRS carried on the second time-frequency resource; The DMRS carried on the second time-frequency resource demodulates the data information.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.

In a tenth aspect, a communication device is provided, and the device may be a network device or a network device. The device includes: a transceiver module, configured to send first indication information to the terminal equipment, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0 , or, the first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0, where the first time-frequency resource includes at least one first time-frequency resource in the time domain A time slot: the transceiver module is further configured to send a data signal on the first time-frequency resource.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the fourth aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the transceiver module is configured to send at least one DMRS to the terminal device, the at least one DMRS is used to demodulate the data signal, and the at least A DMRS is carried on a second time-frequency resource, the second time-frequency resource includes at least one second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as that of the first time-frequency resource The frequency domain resources are the same, and the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the transceiver module is configured to send downlink control information to the terminal device, and the downlink control information is used to schedule the terminal device to operate in the second The at least one DMRS is received in a time slot.

With reference to the tenth aspect, in some implementation manners of the tenth aspect, the first indication information is further used to indicate at least one DMRS port, and the at least one DMRS port is related to the data signal carried on the first time-frequency resource. Association; the transceiver module is specifically configured to send at least one DMRS of the at least one DMRS port to the terminal device.

In an eleventh aspect, a communication device is provided, and the device may be a network device or a network device.

The device includes: a transceiver module, configured to send first indication information to a terminal device, where the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources does not carry a DMRS, and the The first frequency domain resource is part of the frequency domain resources in the first time-frequency resource, wherein the first time-frequency resource includes at least one first time slot in the time domain; the transceiver module is further configured to: The data signal is sent on the first time-frequency resource.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the fifth aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the eleventh aspect, in some implementation manners of the eleventh aspect, the transceiver module is further configured to send at least one DMRS to the terminal device, and the at least one DMRS is used to demodulate the data signal The data signal corresponding to the first frequency domain resource, the at least one DMRS is carried on the second time frequency resource, the second time frequency resource includes at least one second time slot in the time domain, and the second time frequency resource The frequency domain resource is the same as the first frequency domain resource, and the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period.

With reference to the eleventh aspect, in some implementation manners of the eleventh aspect, the second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.

With reference to the eleventh aspect, in some implementation manners of the eleventh aspect, the apparatus further includes: the transceiver module, configured to send downlink control information to the terminal device, the downlink control information is used to schedule all The terminal device receives the at least one DMRS in the second time slot.

With reference to the eleventh aspect, in some implementation manners of the eleventh aspect, the transceiver module is configured to send second indication information to the terminal device, where the second indication information is used to indicate at least one DMRS port, The at least one DMRS port is associated with the data signal carried on the first time-frequency resource; the network device sends at least one DMRS of the at least one DMRS port to the terminal device.

In a twelfth aspect, a communication device is provided, and the device may be a network device or a network device.

The device includes: a transceiver module, configured to send first indication information to the terminal equipment, the first indication information is used to indicate that the DMRS is not carried on the first time-frequency resource, and the first indication information is also used to indicate the second time-frequency resource slot, wherein the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the DMRS carried on the first time-frequency resource. The data signal is associated, the second time-frequency resource includes the second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource , the second time slot and the first time slot are within an uplink and downlink time slot configuration period; the transceiver module is further configured to send a data signal on the first time-frequency resource.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding description of the sixth aspect, and for the sake of brevity, the present application will not repeat them here.

With reference to the twelfth aspect, in some implementation manners of the twelfth aspect, the transceiver module is configured to send the DMRS carried on the second time-frequency resource to the terminal device.

With reference to the twelfth aspect, in some implementation manners of the twelfth aspect, the second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.

In a thirteenth aspect, a communication device is provided, and the device is used to execute the methods provided in the first aspect to the third aspect above. Specifically, the apparatus may include units and/or modules for executing the methods provided in the first aspect to the third aspect, such as a processing module and/or a transceiver module.

In an implementation manner, the apparatus is a terminal device. When the device is a terminal device, the communication module may be a transceiver, or an input/output interface; the processing module may be a processor.

In another implementation manner, the apparatus is a chip, a chip system, or a circuit used in a terminal device. When the device is a chip, a chip system, or a circuit in a device for switching carriers, the transceiver module unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a tube on the chip, a chip system, or a circuit pins or related circuits, etc.; the processing module may be a processor, a processing circuit, or a logic circuit, etc.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding descriptions of the first to third aspects, and for the sake of brevity, the present application will not repeat them here.

Optionally, the above-mentioned transceiver may be a transceiver circuit. Optionally, the above input/output interface may be an input/output circuit.

In a fourteenth aspect, a communication device is provided, and the device is used to execute the methods provided in the fourth aspect to the sixth aspect. Specifically, the apparatus may include a unit and/or module for executing the methods provided in the fourth aspect to the sixth aspect, such as a processing module and/or a transceiver module.

In an implementation manner, the apparatus is a network device. When the device is a network device, the transceiver module may be a transceiver, or an input/output interface; the processing module may be a processor.

In another implementation manner, the apparatus is a chip, a chip system or a circuit used in a network device. When the device is a chip, a chip system, or a circuit in a device for switching carriers, the transceiver module unit may be an input/output interface, an interface circuit, an output circuit, an input circuit, a tube on the chip, a chip system, or a circuit pins or related circuits, etc.; the processing module may be a processor, a processing circuit, or a logic circuit, etc.

Based on the beneficial effects of the above solutions, reference may be made to the corresponding descriptions of the fourth to sixth aspects, and for the sake of brevity, the present application will not repeat them here.

In a fifteenth aspect, there is provided a communication device, which includes: a memory for storing programs; a processor for executing the programs stored in the memory, and when the programs stored in the memory are executed, the processor is used for executing the above-mentioned first aspect To the method provided in the sixth aspect.

In an implementation manner, the apparatus is a terminal device or a network device.

In another implementation manner, the apparatus is a chip, a chip system or a circuit used in a terminal device or a network device.

In a sixteenth aspect, the present application provides a processor configured to execute the method provided in the foregoing aspects. In the process of executing these methods, the process of sending the above information and obtaining/receiving the above information in the above method can be understood as the process of outputting the above information by the processor and the process of receiving the input of the above information by the processor. When outputting the above information, the processor outputs the above information to the transceiver for transmission by the transceiver. After the above information is output by the processor, other processing may be required before reaching the transceiver. Similarly, when the processor receives the above-mentioned input information, the transceiver acquires/receives the above-mentioned information and inputs it into the processor. Furthermore, after the transceiver receives the above information, the above information may need to be processed before being input to the processor.

For the operations of transmitting, sending, and acquiring/receiving involved in the processor, if there is no special description, or if it does not conflict with its actual function or internal logic in the relevant description, it can be understood more generally as the processor Output and receive, input and other operations, rather than the transmission, transmission and reception operations performed directly by radio frequency circuits and antennas.

During implementation, the above-mentioned processor may be a processor dedicated to performing these methods, or may be a processor that executes computer instructions in a memory to perform these methods, such as a general-purpose processor. The above-mentioned memory can be a non-transitory (non-transitory) memory, such as a read-only memory (Read Only Memory, ROM), which can be integrated with the processor on the same chip, or can be respectively arranged on different chips. The embodiment does not limit the type of the memory and the arrangement of the memory and the processor.

A seventeenth aspect provides a computer-readable storage medium, where the computer-readable medium stores program code for execution by a device, where the program code is used to execute the methods provided in the first aspect to the sixth aspect.

In an eighteenth aspect, a computer program product containing instructions is provided, and when the computer program product is run on a computer, it causes the computer to execute the methods provided in the first aspect to the sixth aspect.

A nineteenth aspect provides a chip, the chip includes a processor and a communication interface, the processor reads instructions stored in the memory through the communication interface, and executes the methods provided in the first aspect to the sixth aspect above.

Optionally, as an implementation manner, the chip may further include a memory, the memory stores instructions, the processor is used to execute the instructions stored in the memory, and when the instructions are executed, the processor is used to execute the above-mentioned first The methods provided in the first aspect to the sixth aspect.

Description of drawings

Fig. 1 shows an exemplary architecture diagram of a communication system 100 according to an embodiment of the present application.

Fig. 2 shows a schematic diagram of DMRS configuration on the first time-frequency resource provided by the present application.

FIG. 3 shows a schematic flowchart of a communication method 300 provided by an embodiment of the present application.

FIG. 4 shows a schematic flowchart of a method 400 for demodulating a data signal provided by an embodiment of the present application.

FIG. 5 shows a schematic diagram of a relationship between a first time slot and a second time slot provided by an embodiment of the present application.

FIG. 6 shows a schematic flowchart of a communication method 600 provided by an embodiment of the present application.

FIG. 7 shows a schematic flowchart of a communication method 700 provided by an embodiment of the present application.

FIG. 8 shows a schematic diagram of a relationship between a first time slot and a second time slot according to an embodiment of the present application.

FIG. 9 is a schematic block diagram of an example of a network device of the present application.

Fig. 10 is a schematic block diagram of an example of a terminal device of the present application.

Fig. 11 is a schematic diagram of a communication device provided by an embodiment of the present application.

FIG. 12 is a schematic diagram of another example of a communication device provided by an embodiment of the present application.

Fig. 13 is a schematic structural diagram of a terminal device of the present application.

Detailed ways

The technical solution in this application will be described below with reference to the accompanying drawings.

The technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, 5th Generation (5G) system or new radio (New Radio, NR), next-generation communication system (for example, 6G communication system), fusion system of multiple access systems, or evolution system, etc.

The terminal equipment in the embodiment of the present application may refer to user equipment, access terminal, subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device can also be a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (PDA), a wireless communication Functional handheld devices, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in 5G networks or terminal devices in next-generation communication systems (such as 6G communication systems), or future evolved The terminal equipment in the public land mobile network (Public Land Mobile Network, PLMN), etc., is not limited in this embodiment of the present application.

The network device in the embodiment of the present application may be a device for communicating with a terminal device, and the network device may be a Global System of Mobile communication (GSM) system or a code division multiple access (Code Division Multiple Access, CDMA) The base station (Base Transceiver Station, BTS) in the wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system (NodeB, NB) can also be the evolved base station (Evolutionary Base Station) in the LTE system NodeB, eNB or eNodeB), it can also be a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario, or the network device can be a relay station, an access point, a vehicle device, a wearable device, and a 5G The embodiment of the present application does not limit the network equipment in the network or the network equipment in the next generation communication system (for example, 6G communication system), or the network equipment in the future evolved PLMN network.

Fig. 1 is an exemplary architecture diagram of a communication system 100 according to an embodiment of the present application. The method in the embodiment of the present application may be applied to the communication system 100 shown in FIG. 1 . It should be understood that the communication system 100 to which the method of the embodiment of the present application can be applied may include more network devices or terminal devices.

The network device or terminal device in FIG. 1 may be hardware, or functionally divided software, or a combination of the above two. The network devices or terminal devices in FIG. 1 may communicate through other devices or network elements.

In the communication system 100 shown in FIG. 1 , a network device 110 and a terminal device 101 form a communication system 100 . In the communication system 100 , the network device 110 can send downlink data to the terminal device 101 to the terminal device 106 . It should be appreciated that the terminal device 101 may be, for example, a cellular phone, a smart phone, a portable computer, a handheld communication device, a handheld computing device, a satellite radio, a global positioning system, a personal digital assistant (personal digital assistant, PDA) and/or Any other suitable device for communicating over the wireless communication system 100.

The communication system 100 may be a PLMN network, a device-to-device (device-to-device, D2D) network, a machine-to-machine (machine to machine, M2M) network, an internet of things (internet of things, IoT) or other networks.

For ease of understanding, some terms that appear in this article are introduced first:

1. Subcarriers: In an orthogonal frequency division multiplexing (OFDM) system, frequency domain resources are divided into several subresources, and each subresource in the frequency domain can be called a subcarrier. A subcarrier can also be understood as the minimum granularity of frequency domain resources.

2. Subcarrier spacing: In the OFDM system, the interval value between the center positions or peak positions of two adjacent subcarriers in the frequency domain. For example, the subcarrier spacing in the LTE system is 15kHz, and the subcarrier spacing in the NR system in 5G can be 15kHz, or 30kHz, or 60kHz, or 120kHz, etc.

3. Resource block: N consecutive subcarriers in the frequency domain may be called a resource block. For example, a resource block in the LTE system includes 12 subcarriers, and a resource block in the NR system in 5G also includes 12 subcarriers. With the evolution of the communication system, the number of subcarriers included in a resource block may also be other values.

4. Time slot: A time slot in the 5G NR system includes 14 OFDM symbols, the time slot length corresponding to the 15kHz subcarrier spacing is 1ms, and the time slot length corresponding to the 30kHz subcarrier spacing is 0.5ms.

5. Subframe: The time length of a subframe in the 5G NR system is 1ms.

6. OFDM symbol: the smallest time unit in the time domain in the OFDM system.

7. Time-frequency resource unit: The smallest resource granularity in the OFDM system, which is one OFDM symbol in the time domain and one subcarrier in the frequency domain.

8. Antenna port: In the 5G NR system, the antenna port is a logical port for transmission, and one antenna port includes multiple physical antennas. From the perspective of the receiving end, each antenna port corresponds to an independent wireless channel.

9. DMRS: A reference signal used to restore the received signal. DMRS is a known signal at the receiving end. According to the received signal and the known DMRS signal, the receiving end can determine the fading characteristics of the wireless channel, that is, the channel coefficient of the wireless channel. , used to restore the received signal. In the 5G NR system, considering that the channel coefficients from different antenna ports to terminals are not the same, in order for the receiving end to obtain information transmitted on multiple spatial layers, it is necessary to estimate the channel coefficients between each antenna port and the terminal. Therefore, different DMRSs need to be configured for each antenna port, and the DMRSs corresponding to different antenna ports can be multiplexed by means of time division, frequency division, and code division. Currently, the 5G NR system can support a maximum of 12 MDRS ports.

10. Space layer: In the existing wireless communication system, the base station is equipped with multiple antennas to use multiple input multiple output (multi-input multi-output, MIMO) technology to achieve spatial multiplexing transmission, that is, transmission on the same time-frequency resources Multiple uncorrelated data streams, each uncorrelated data stream is transmitted on an independent spatial layer, and each spatial layer will be mapped to a different antenna port for transmission.

11. Resource block group (RBG): One or more resource blocks form an RBG. In 5G NR, the size of RBG is configured through high-level parameters.

11. Partial bandwidth (Bandwidth Part, BWP): In 5G NR, some frequency domain resources in the carrier can be configured for terminal equipment for data transmission, without requiring all frequency domain resources in the carrier.

12. Fixed access scenarios: Fixed Wireless Access (FWA) networks relying on Long term evolution (LTE) and 5G NR (New Radio, NR) technologies, through indoor or outdoor user premises equipment ( Customer Premises Equipment (CPE) provides wireless LAN or limited LAN access to end users. CPE can provide Internet, landline telephone, TV, smart home and other services to end users.

13. Slowly changing channel in the fixed wireless access scenario: In the FWA scenario, the CPE device is installed at a fixed location, and its channel state can theoretically remain constant when there are no moving reflectors around. However, considering the influence of surrounding mobile reflectors, even for a fixed-position terminal, its channel state cannot be assumed to be completely static. Based on the results of field channel tests, it has been preliminarily concluded that for typical non-line-of-sight (NLOS) and line-of-sight (LOS) channel environments, the Channel changes can be assumed at a moving speed of 1 km/h. Therefore, for a terminal at a fixed location, its channel variation range in multiple consecutive time slots is lower than that of a mobile terminal, that is to say, for a terminal at a fixed location, its channel in the time domain is slowly changing.

It should be noted that, in this application, the first time-frequency resource is used to carry data signals, the time domain of the first time-frequency resource may include at least one time slot, and the frequency domain resource includes all time slots of the at least one time slot. frequency domain resources under domain symbols. It should be understood that in this application, receiving a data signal on the first time-frequency resource can be understood as receiving a physical downlink shared channel on the first time-frequency resource, or can be understood as receiving a physical downlink shared channel on the first time-frequency resource. Data on the shared channel. Wherein, the above-mentioned physical downlink shared channel includes all of the first time-frequency resources in the frequency domain, and may only include part of the first time-frequency resources in the time domain. The time-domain resource part of the first time-frequency resource may be the time-domain resource allocated by the network device to the scheduled terminal device, that is, the network device may pass indication information (such as: indication information carried in the time-domain resource allocation field of DCI ) indicated to the terminal equipment. Alternatively, in this application, receiving a data signal on the first time-frequency resource can also be understood as receiving multiple physical downlink shared channels on the first time-frequency resource, or can also be understood as receiving multiple physical downlink shared channels on the first time-frequency resource. data on physical downlink shared channels. Wherein, any physical downlink shared channel among the above-mentioned multiple physical downlink shared channels includes all the frequency domain resources of the first time-frequency resource in the frequency domain, and may only include the time domain of the first time-frequency resource in the time domain resource section. The time-domain resource part of the first time-frequency resource may be the time-domain resource allocated by the network device to the scheduled terminal device, that is, the network device indicates to the terminal through indication information (such as: the time-domain resource allocation field in DCI) equipment.

Exemplarily, if the first time-frequency resource includes a time slot, the first time-frequency resource may be expressed as (a) in FIG. 2 .

When the first time-frequency resource is configured as a time slot in the time domain, the DMRS configuration on the first time-frequency resource in this application may be expressed as (b) and (c). In (b), no DMRS is carried on the time-frequency resources corresponding to all the frequency domain resources. (c) shows that no DMRS is carried on the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources. It should be understood that the DMRS in (c) may be carried on other time-frequency resources other than the first frequency domain resource, that is, the DMRS in (c) may be carried in other time domain symbols corresponding to on time-frequency resources. In addition, the frequency domain range of the first frequency domain resource may also change, which is not limited in this application, and may be within the protection scope of this application.

It should be understood that FIG. 2 is only an example, and when the first time-frequency resource includes multiple time slots, it is also within the protection scope of the present application.

In order to facilitate understanding of the embodiments of the present application, the process of sending indication information described below may be performed by a network device, or may be performed by a chip configured in the network device. For convenience of description, the following are collectively referred to as network devices.

FIG. 3 shows a schematic flow chart of a communication method 300 provided in an embodiment of the present application. As shown in FIG. 3 , the communication method includes:

S301. The network device sends first indication information to the terminal device.

Specifically, the network device sends first indication information to the terminal device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to bear data on the first time-frequency resource is 0, or the first time-frequency resource The indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0. The code division multiplexing CDM group of the DMRS can be a pre-specified time-frequency resource that can be used to bear the DMRS, and multiple DMRS can be transmitted in a code division multiplexing manner on the time-frequency resource. For example, in the NR standard, when the DMRS type 1 is used, a total of 2 DMRS CDM groups are specified, and when the DMRS type 1 is used, a total of 3 DMRS CDM groups are specified. In the NR system, in order to reduce the overhead for transmitting DMRS, the code division multiplexing CDM group of the DMRS may not carry the DMRS, and then the overall transmission rate can be improved by carrying data in the CDM group of the DMRS. In the existing NR standard, the number of code division multiplexing CDM groups of DMRS not used to carry data can be notified to the terminal equipment through dynamic indication. When DMRS type 1 is adopted, the code division of the DMRS not used to carry data dynamically The number of multiplexing CDM groups may be 1 and 2. When the DMRS type 1 is adopted, the numbers of code division multiplexing CDM groups of the DMRS not used to carry data may be 1, 2 and 3 that are dynamically indicated.

Optionally, the first indication information may be carried in DCI.

Optionally, the frequency domain resource included in the first time-frequency resource may be indicated by a frequency domain resource allocation field in the DCI.

In a possible implementation manner, when the first indication information is carried in the DCI, it may be a newly added indication field in the DCI, and the indication field carries the first indication information.

Or, in another possible implementation manner, the first indication information may also multiplex an indication field indicating a DMRS antenna port. Alternatively, the first indication information may include an antenna port field in the DCI. Exemplarily, the first indication information may be the antenna port field in the existing 3GPP standard TS 38.212.

Specifically, the first indication information may include first sub-information and second sub-information. Wherein, the first sub-information is used to indicate the DMRS port associated with the data signal on the first time-frequency resource, and the second sub-information is used to indicate the code division multiplexing CDM group of the DMRS not used to carry data on the first time-frequency resource number, or the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource. It should be understood that when the second sub-information indicates that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0, or the second sub-information indicates the time domain corresponding to the DMRS on the first time-frequency resource When the number of symbols is 0, it means that no DMRS is carried on the first time-frequency resource. In other words, all the first time-frequency resources are used to carry data signals. For example, it may be (b) in FIG. 2 .

It should be noted that the first time-frequency resource may include at least one time slot.

In a possible implementation manner, the first indication information may indicate an index in a predefined index table, and the index may correspond to the above-mentioned first sub-information and second sub-information.

It should be understood that the "predefined" may mean preset, for example, protocol definition, which may be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in the device. The implementation method is not limited.

Optionally, any index value in the index table may indicate the number of CDM groups and DMRS ports not used for carrying data. There is at least one first index value in the index table, and the index value indicates that the number of CDM groups of the DMRS not used to carry data is 0. Optionally, the DMRS port indicated by the first index value is the same as the DMRS port indicated by one or more second index values in the index table. The second index value is one of other index values in the index table except the at least one first index value.

When the first indication information indicates the index in the predefined index table, for example, the predefined index table may include entries in the antenna port index table in the current 3GPP TS 38.212 and the number of DMRS CDM groups not used to carry data The table entry is 0. Exemplarily, the predefined index table may include entries in the antenna port index table Table 7.3.1.2.2-3 of single DMRS symbol and DMRS type 1 in 3GPPTS 38.212, and 9 indicators not used to carry data The entries whose number of CDM groups is 0, that is, the entries whose indexes are 12 to 20, the index table may be as shown in Table 1 below.

Table 1

It should be noted that, in this table 1, at least one DMRS port corresponding to the table entry of "the CDM group of the DMRS not used to bear data is 0" and at least one of the "DMRS CDM group not used to bear data is not 0" At least one DMRS port of the entry is the same, for example, when the index indicated by the first indication information is 12, the first indication information is used to indicate that all CDM groups of the DMRS carried on the first time-frequency resource are used to carry data, which indicates The antenna port number of is the same as the antenna port number indicated by index value 0 and index value 3. It is understandable that although the first time-frequency resource does not bear DMRS, the data signal on the first time-frequency resource still needs to be demodulated, that is, the antenna associated with the first time-frequency resource needs to be demodulated. The DMRS-related information obtained at the port is used for demodulation. That is to say, the first indication information may also indicate related information of the DMRS used to demodulate the data signal, and may be obtained from the port of the DMRS indicated by the indication information.

Optionally, the index table may only include one first index value, the number of CDM groups of DMRS not used to bear data indicated by the first index is 0, and the first index value does not indicate a DMRS port. When the terminal device receives the first indication information and the first indication information indicates the first index, the terminal device determines that the DMRS port associated with the data signal carried on the first time-frequency resource is the first DMRS port. The first DMRS port may be a DMRS port associated with the last data signal received by the terminal device. Alternatively, the first DMRS port includes DMRS ports with indexes from 0 to N-1, where N is the number of DMRS ports associated with the last data signal received by the terminal device. For example, the index table is shown in Table 2. In Table 2, index 12 indicates that the number of CDM groups not used to bear data is 0, and index 12 does not indicate a DMRS port.

Table 2

Optionally, the network device may send high-level signaling, and the high-level signaling configures the terminal device to use the predefined index table.

Optionally, the terminal device may send capability information to the network device, where the capability information indicates that the terminal device has the capability of receiving data signals on the first time-frequency resource and not receiving DMRS. This capability can also be understood as the ability of the terminal device to demodulate a data signal when it does not receive a DMRS on the first time-frequency resource. Further, the terminal device can use the predefined index table if it has this capability.

S302. The network device sends a data signal to the terminal device.

Specifically, the network device sends the data signal mapped on the first time-frequency resource to the terminal device.

S303. The terminal device receives the data signal.

Specifically, the terminal device receives the data signal carried on the first time-frequency resource according to the first indication information.

Based on the above solution, the communication method provided by the present application can realize flexible configuration of the DMRS by indicating that the current time-frequency resource does not carry the DMRS, thereby reducing the overhead of the DMRS.

Further, the present application also provides a method for demodulating a data signal, as shown in FIG. 4 .

S401. The terminal device acquires at least one DMRS.

Specifically, when the terminal device learns that no DMRS is carried on the first time-frequency resource according to the first indication information shown in FIG. 3, after the terminal device receives the data signal on the first time-frequency resource, the terminal device obtains the Signal associated DMRS.

Optionally, obtaining the DMRS associated with the data signal by the terminal device may include obtaining at least one of the following DMRS related information: DMRS signal, part of the DMRS signal, channel estimation result obtained according to the DMRS, wherein the DMRS signal The part may be a DMRS signal corresponding to one time-domain symbol.

In a possible implementation manner, the terminal device may acquire at least one DMRS received in at least one second time slot in a cache.

Optionally, the terminal device may receive the DCI sent by the network device, and the DCI is used to schedule the DMRS received by the terminal device in the second time slot, or the DCI includes the information used to indicate that the DMRS can be received in the second time slot Instructions. It should be understood that in this manner, the second time slot is a time slot in which the terminal device indicated by the DCI can receive the DMRS. Therefore, when the terminal device can only obtain DCI, obtain the DMRS that the DCI schedules the terminal device to receive; The terminal device cannot receive the corresponding DMRS according to the DCI.

The at least one DMRS obtained by the terminal device may be carried on the second time-frequency resource, where the second time-frequency resource includes at least one second time slot in the time domain. It should be understood that since the DMRS received by the terminal device is used to demodulate the data signal on the first time-frequency resource, the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, and at the same time, the At least one second time slot is within an uplink and downlink time slot configuration period with the first time slot in the above embodiment shown in FIG. 3 . That is, on the premise that the terminal device can use the obtained DMRS-related information for demodulation, the phases of the obtained DMRS and the missing DMRS should be continuous, and when the obtained DMRS and the missing DMRS in the first time slot are at two or two When the cycle is configured in row slots, the phase is discontinuous.

Optionally, the configuration of the uplink time domain resource and the downlink time domain resource of the terminal device is periodically configured in units of uplink and downlink time slot configuration periods. For example, in LTE, the uplink and downlink time slot configuration period can be 5ms or 10ms; in NR, the uplink and downlink time slot configuration period can be configured through parameters in high-layer signaling, such as dl-UL-TransmissionPeriodicity parameter configuration, and at the same time, In NR, there is only one uplink and downlink switching point in one uplink and downlink time slot configuration period.

For example, FIG. 5 shows a schematic diagram of the relationship between the first time slot and the second time slot. In FIG. 5, the second time slot may be any time slot before the first time slot.

In (a), the first time slot is in the third time slot in the uplink and downlink time slot configuration period, then the first two time slots in the uplink and downlink time slot configuration period can be used as the second time slot, The terminal device can obtain the DMRS information carried on the first time slot to demodulate the data signal carried on the first time-frequency resource. Of course, it can also obtain the DMRS information carried on the second time slot to demodulate the first time-frequency resource. The data signal carried on the frequency resource.

In (b), the first time slot is the last time slot in the uplink and downlink time slot configuration period, then, all time slots except the last time slot in the uplink and downlink time slot configuration period can be regarded as the second time slot, the terminal device may obtain any one or more DMRS on the second time slot carrying DMRS information, to demodulate the data signal carried on the first time-frequency resource.

It should be understood that if the first indication information received by the terminal device is also used to indicate at least one DMRS port, when obtaining the DMRS carried on the second time-frequency resource corresponding to the second time slot, the port indicated by the indication information should be used The received at least one piece of DMRS information is used to demodulate the data signal, or in other words, the DMRS corresponding to the DMRS port indicated by the indication information should be used to demodulate the data signal.

S402. The terminal device demodulates the data signal according to the at least one DMRS.

Specifically, after the terminal device acquires the data signal carried on the first time-frequency resource and at least one DMRS corresponding to the data signal, the terminal device uses the at least one DMRS to demodulate the data signal.

Based on the above scheme, the method for demodulating data provided by this application, when the terminal device does not receive the DMRS for demodulating data on the time-frequency resource, realizes the data signal by acquiring at least one DMRS on the second time slot. demodulation.

It should be understood that the premise that the terminal device can use the DMRS to correctly demodulate data is that the terminal device stores the corresponding DMRS in the second time slot. Therefore, further, in this application, the terminal device also needs to store the above-mentioned second time-frequency DMRS hosted by the resource. In this application, when the terminal device is in a configuration cycle of uplink and downlink time slots, if the terminal device receives the DMRS on a time-frequency resource, the terminal device stores the received DMRS. When the terminal device receives the first indication information and determines that the DMRS is not carried on the first time-frequency resource, the terminal device will obtain the DMRS corresponding to the data signal carried on the first time-frequency resource from the cache, and demodulate the data signal .

Optionally, the terminal device stores at least one DMRS in the third time slot. The third time slot is other time slots except the last time slot in the uplink and downlink time slot configuration period. In the first implementation manner, when the terminal device receives the DCI for scheduling the terminal device to receive the DMRS in the third time slot, the terminal device stores the DMRS in the third time slot. It should be understood that the at least one DMRS in the third time slot stored by the terminal device includes the DMRS in the second time slot. Therefore, the terminal device can acquire the DMRS of the second time slot in the cache. In the second embodiment, the terminal device stores the signal corresponding to the first time domain symbol in each third time slot, where the third time slot is any time except the last time slot in the uplink and downlink time slot switching period Gap. It should be understood that the terminal device stores the signal corresponding to the first time domain symbol in each third time slot including the DMRS in the second time slot. Therefore, the terminal device can acquire the DMRS of the second time slot in the cache. The first time-domain symbol can be predefined, and the time-frequency resource corresponding to the first time-domain symbol can carry DMRS. For example, the NR standard specifies the second and third time-domain symbols in a time slot DMRS can be carried on the corresponding time-frequency resources, therefore, the first time-domain symbol can be the second and/or third time-domain symbol in the time slot, therefore, the terminal device can store the second and/or third A signal in a time domain symbol, the DMRS in the signal is used for demodulation of the data signal received in the first time slot.

In addition, in order to save resources, the terminal device may discard the stored DMRS after an uplink and downlink time slot configuration period ends, that is, clear the DMRS in the cache. In other words, the terminal device only stores the DMRS in the second time slot until the end of the uplink and downlink time slot configuration period where the second time slot is located.

In another possible implementation, if the terminal device does not store the DMRS related to the data carried on the first time-frequency resource, or the first time slot corresponding to the first time-frequency resource is located in an uplink and downlink time slot configuration In the first time slot of the period, or when the DCI indicating the terminal device to receive the DMRS on the second time-frequency resource is lost, causing the terminal device to fail to obtain the DMRS, the terminal device does not perform the operation of receiving data. It should be understood that even if the terminal device receives the data signal at this time, the terminal device cannot correctly demodulate the data signal. Therefore, in order to save resources of the terminal device, the terminal device may discard the first indication information, and will not receive the data signal from the network device in the future. sent data signal.

Optionally, instead of discarding the first indication information, the terminal device may use a blind channel estimation algorithm to perform channel estimation and demodulate the data signal after receiving the data signal.

FIG. 6 shows a schematic flowchart of a communication method 600 provided in an embodiment of the present application. As shown in FIG. 6, the communication method includes:

S601. The network device sends first indication information to the terminal device.

Specifically, the network device sends the first indication information to the terminal device, where the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources does not bear DMRS, and the first frequency domain resource is Part of frequency domain resources in the first time-frequency resources, where the first time-frequency resources include at least one first time slot in the time domain.

Optionally, the first indication information may be carried in DCI.

Optionally, the first frequency domain resource is a part of the frequency domain resource in the first time-frequency resource. It can be understood that the first frequency domain resource is a part of the frequency domain resource indicated by the frequency domain resource allocation field in the DCI, or It can be understood that the first frequency domain resource is a part of frequency domain resources allocated to the scheduled terminal device for receiving data signals.

It should be understood that since the first indication information is used to indicate that part of the frequency domain of the first time-frequency resource does not bear DMRS, therefore, other time-frequency resources in the first time-frequency resource except the time-frequency resource corresponding to the first frequency domain resource The DMRS is carried on the time-frequency resource, for example, it may be the diagram (c) in FIG. 2 .

Optionally, the first indication information may indicate one or more resource block groups in the form of a bitmap, the one or more resource block groups belong to the first frequency domain resource, and the resource block group includes one or more resource block groups .

Optionally, the size of the one or more resource block groups may be determined by a high-layer parameter.

Alternatively, the size of the one or more resource block groups may be determined by a coefficient k, the coefficient k is predefined or configured by the network device through high-level signaling, and k is an integer greater than 1. The size of the resource block group is

in,

The size of the resource block group configured for higher layer parameters.

In addition, the size of the one or more resource block groups may be determined according to the length of the predefined first indication information. The size of the resource block group is

in,

is the size of a bandwidth part (Bandwidth Part, BWP), and M is the length of the predefined first indication information.

Optionally, when the first frequency domain resource is a continuous frequency domain resource, the first indication information indicates continuous resource blocks in the frequency domain of the first time-frequency resource in the form of a resource indicator value (RIV) RB. That is to say, when frequency-domain resource allocation type 1 is used, that is, continuous resource allocation, the first indication information may indicate the starting point of the first frequency-domain resource in the frequency-domain resource of the first time-frequency resource in the form of RIV. The frequency domain position and the number of RBs included in the first frequency domain resource. The calculation method of RIV can follow the calculation method in 3GPP TS 38.214. Alternatively, the first indication information may indicate the continuous resource block groups in the frequency domain of the first time-frequency domain resource in the form of RIV. The resource block group includes one or more RBs. Exemplarily, the resource block group includes k RBs, where k is pre-specified in a standard, or is configured by a network device through a high-level parameter.

S602. The network device sends a data signal to the terminal device.

S603. The terminal device receives the data signal.

Based on the above solution, the communication method provided by the present application can implement flexible configuration of DMRS by indicating that the time-frequency resources corresponding to some frequency domain resources do not carry DMRS, thereby reducing the overhead of DMRS.

It should be understood that after the terminal device receives the data signal, the terminal device will demodulate the received data. Therefore, the terminal device needs to store the DMRS carried by the second time-frequency resource, and can use the method shown in FIG. The data signal is demodulated. For simplicity, this embodiment only introduces the difference from the method described in FIG. 4:

(1) The difference from step S401 is:

The steps in step S401 may be used for the terminal device to acquire at least one DMRS carried on the second time-frequency resource, where the second time-frequency resource includes at least one second time slot in the time domain. It should be understood that since the DMRS received by the terminal device is used to demodulate the data signal on the first time-frequency resource, the frequency domain resource of the second time-frequency resource is the same as the first frequency domain resource.

It should be understood that since only the DMRS corresponding to the second frequency domain resource is acquired in the above steps, it can only be used to demodulate the part of the data signal corresponding to the first frequency domain resource. Therefore, obtaining at least one DMRS by the terminal device also includes: the terminal device also needs to obtain the DMRS associated with another part of the data signal, because other time-frequency resources in the first time-frequency resource except the time-frequency resource corresponding to the first frequency domain resource The DMRS is carried on the resource, so the terminal device can obtain it through direct reception.

FIG. 7 shows a schematic flowchart of a communication method 700 provided in an embodiment of the present application. As shown in FIG. 7, the communication method includes:

S701. The network device sends first indication information to the terminal device.

Specifically, the network device sends first indication information to the terminal device, where the first indication information is used to indicate that the DMRS is not carried on the first time-frequency resource, and where the first indication information is also used to indicate the second time slot. Wherein, the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is associated with the data signal carried on the first time-frequency resource , the second time-frequency resource includes the second time slot in the time domain, the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, and the second time slot is the same as the first time-frequency resource slots within one uplink and downlink slot configuration period.

It should be understood that the first indication information is used to indicate that no DMRS is carried in the first time-frequency resource, for example, it may be diagram (b) in FIG. 2 .

Optionally, the first indication information may be carried in DCI.

It should be noted that the first indication information indicates the second time slot, which may directly indicate the index of the second time slot, or may indicate the second time slot indirectly. For example, the first indication information indicates the index of the second time slot. The time slot offset between the second time slot and the first time slot.

In a possible implementation manner, when the first indication information indicates the index of the second time slot, the field of the first indication information may include two bits, and the value of the field may indicate a different position of the second time slot , as shown in Table 3 below.

table 3

字段取值field value	含义meaning
0101	无DMRS，关联n-1时隙No DMRS, associated with n-1 time slots
1010	无DMRS，关联n-2时隙No DMRS, associated with n-2 time slots
1111	无DMRS，关联n-3时隙No DMRS, associated with n-3 time slots

In Table 3, if the terminal device receives data in the nth time slot, when the bit value of the first indication information is 01, the first indication information indicates that there is no DMRS in the nth time slot, and the first time-frequency resource The data signal carried is associated with the DMRS corresponding to the n-1th time slot. When the bit value of the first indication information is 10, the first indication information indicates that there is no DMRS in the nth time slot, and the data signal carried on the first time-frequency resource is associated with the DMRS corresponding to the n-2th time slot. When the bit value of the first indication information is 11, the first indication information indicates that there is no DMRS in the nth time slot, and the data signal carried on the first time-frequency resource is associated with the DMRS corresponding to the n-3th time slot. The resource configuration indicated by the first indication information may be as shown in FIG. 8. In FIG. Indicates the DMRS in the slot associated with the data signal on this slot n.

It should be understood that Table 3 is only an example rather than a limitation, and its bit values and corresponding meanings can also be recombined, which is not limited in the present application. In addition, the field of the first indication information may include more bits, which are used to indicate more positions of the second time slot, that is, other transformation forms of Table 3 should be within the protection scope of the present application.

In a practicable manner, the first indication information may also indicate that the DMRS is carried on the first time-frequency resource. At this time, the table 3 may be changed to the form of the following table 4.

Table 4

字段取值field value	含义meaning
0000	有DMRShave DMRS
0101	无DMRS，关联n-1时隙No DMRS, associated with n-1 time slots
1010	无DMRS，关联n-2时隙No DMRS, associated with n-2 time slots
1111	无DMRS，关联n-3时隙No DMRS, associated with n-3 time slots

In Table 4, when the bit value of the first indication information is 00, the first indication information indicates that there is a DMRS in the nth time slot, and the values of other fields can be the same as those described in Table 3 above, and will not be repeated here. .

S702. The network device sends a data signal to the terminal device.

S703. The terminal device receives the data signal.

Based on the above solution, the communication method provided by the present application can realize the flexible configuration of DMRS by indicating that no DMRS is carried on the time-frequency resource and at the same time indicating the time slot of the DMRS associated with the data signal carried on the time-frequency resource. Thereby reducing the overhead of DMRS.

It should be understood that since the first indication information indicates the DMRS associated with the data on the first time-frequency resource, the terminal device may obtain the DMRS carried on the time-frequency resource of the second time slot indicated by the first indication information. to demodulate the data.

It should be noted that when the first time-frequency resource indicated by the first indication information received by the terminal device is in the first time slot, that is, the first time slot is the first time slot corresponding to an uplink and downlink time slot configuration cycle , the first indication information cannot indicate the second time slot for the terminal device, and at this time the terminal device may discard the first indication information, and step 703 is not performed.

Optionally, when the first indication information cannot indicate the second time slot for the terminal device, the terminal device executes step 703. At this time, the terminal device uses a blind channel estimation algorithm to perform channel estimation and demodulate the data signal.

It should be noted that, because the second time slot is located before the first time slot, the terminal device needs to store the DMRS of the second time slot, and at this time the terminal device can demodulate the data signal according to the method shown in FIG. 4 , I won't repeat them here.

Above, the method provided by the embodiment of the present application is described in detail with reference to FIG. 3 to FIG. 8 . Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to FIG. 9 to FIG. 13 .

Fig. 9 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in the figure, the communication device 10 may include a processing module 11 and a transceiver module 12 .

In a possible design, the communication device 10 may correspond to the network device in the foregoing method embodiments.

Specifically, the communication device 10 may correspond to the network device in the method 300, the method 600, and the method 700 according to the embodiment of the present application, and the communication device 10 may include a method for executing the method 300 in FIG. 3 or the method in FIG. 6 600 or the modules of the method executed by the network device in method 700 in FIG. 7 . Moreover, each unit and the above-mentioned other operations and/or functions in the communication device 10 are respectively for implementing the corresponding flow of the method 300 in FIG. 3 or the method 600 in FIG. 6 or the method 700 in FIG. 7 .

Wherein, when the communication device 10 is used to execute the method 300 in FIG. 3 , the transceiver module 12 can be used to execute step 301 and step 302 in the method 300 .

When the communication device 10 is used to execute the method 600 in FIG. 6 , the transceiver module 12 can be used to execute step 601 and step 602 in the method 600 .

When the communication device 10 is used to execute the method 700 in FIG. 7 , the transceiver module 12 can be used to execute step 701 and step 702 in the method 700 .

Fig. 10 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in the figure, the communication device 20 may include a transceiver module 21 and a processing module 22 .

In a possible design, the communication device 20 may correspond to the terminal device in the above method embodiment, or a chip configured in the terminal device.

Specifically, the communication device 20 may correspond to the terminal device in the method 300, the method 400, the method 600, and the method 700 according to the embodiment of the present application, and the communication device 20 may include a Modules of the method executed by the terminal device in method 400 in FIG. 6 or method 600 in FIG. 6 or method 700 in FIG. 7 . In addition, each unit in the communication device 20 and other operations and/or functions mentioned above are respectively for realizing the method 300 in FIG. 3 or the method 400 in FIG. 4 or the method 600 in FIG. 6 or the method 700 in FIG. process.

When the communication device 20 is used to execute the method 300 in FIG. 3 , the transceiver module 21 can be used to execute step 301 and step 302 in the method 300 . The processing module 22 can be used to execute step 303 in the method 300 .

When the communication device 20 is used to execute the method 400 in FIG. 4 , the processing module 22 may be used to execute step 401 and step 402 in the method 400 .

When the communication device 20 is used to execute the method 600 in FIG. 6 , the transceiver module 21 can be used to execute step 601 and step 602 in the method 600 . The processing module 22 can be used to execute step 603 in the method 600 .

When the communication device 20 is used to execute the method 700 in FIG. 7 , the transceiver module 21 can be used to execute step 701 and step 702 in the method 700 . The processing module 22 can be used to execute step 703 in the method 700 .

According to the foregoing method, FIG. 11 is a schematic diagram of a communication device 30 provided in an embodiment of the present application. As shown in FIG. 11 , the device 30 may be a communication device, including a network element with an access management function, such as an AMF.

The device 30 may include a processor 31 (ie, an example of a processing module) and a memory 32 . The memory 32 is used to store instructions, and the processor 31 is used to execute the instructions stored in the memory 32, so that the apparatus 30 implements the steps performed by the network device in the method corresponding to FIG. 3 , or FIG. 6 or FIG. 7 .

Further, the device 30 may further include an input port 33 (ie, an example of a transceiver module) and an output port 34 (ie, another example of a transceiver module). Further, the processor 31 , the memory 32 , the input port 33 and the output port 34 can communicate with each other through internal connection paths, and transmit control and/or data signals. The memory 32 is used to store a computer program, and the processor 31 can be used to call and run the computer program from the memory 32, to control the input port 33 to receive signals, and to control the output port 34 to send signals, so as to complete the network device in the above method step. The memory 32 can be integrated in the processor 31 or can be set separately from the processor 31 .

Optionally, the input port 33 can be a receiver, and the output port 34 can be a transmitter. Wherein, the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the communication device 30 is a chip or a circuit, the input port 33 is an input interface, and the output port 34 is an output interface.

As an implementation manner, the functions of the input port 33 and the output port 34 may be realized by a transceiver circuit or a dedicated chip for transceiver. The processor 31 may be considered to be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.

As another implementation manner, it may be considered to use a general-purpose computer to implement the communication device provided in the embodiment of the present application. The program codes to realize the functions of the processor 31 , the input port 33 and the output port 34 are stored in the memory 32 , and the general processor realizes the functions of the processor 31 , the input port 33 and the output port 34 by executing the codes in the memory 32 .

Wherein, each unit or unit in the communication device 30 may be used to execute each action or processing procedure performed by the network device in the above method, and here, in order to avoid redundant description, its detailed description is omitted.

For the concepts, explanations, detailed descriptions and other steps involved in the device 30 related to the technical solutions provided by the embodiments of the present application, please refer to the foregoing methods or descriptions of these contents in other embodiments, and details are not repeated here.

According to the foregoing method, FIG. 12 is a schematic diagram of a communication device 40 provided in an embodiment of the present application. As shown in FIG. 12 , the device 40 may be a terminal device.

The device 40 may include a processor 41 (ie, an example of a processing module) and a memory 42 . The memory 42 is used to store instructions, and the processor 41 is used to execute the instructions stored in the memory 42, so that the apparatus 40 implements the steps performed by the terminal device in FIG. 3 , FIG. 4 or FIG. 6 or FIG. 7 .

Further, the device 40 may also include an input port 43 (ie, an example of a transceiver module) and an output port 44 (ie, another example of a transceiver module). Further, the processor 41 , the memory 42 , the input port 43 and the output port 44 can communicate with each other through internal connection paths, and transmit control and/or data signals. The memory 42 is used to store a computer program, and the processor 41 can be used to call and run the computer program from the memory 42 to control the input port 43 to receive signals and the output port 44 to send signals, so as to complete the terminal device in the above method step. The memory 42 can be integrated in the processor 41 or can be set separately from the processor 41 .

Optionally, the input port 43 may be a receiver, and the output port 44 may be a transmitter. Wherein, the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the communication device 40 is a chip or a circuit, the input port 43 is an input interface, and the output port 44 is an output interface.

As an implementation, the functions of the input port 43 and the output port 44 may be implemented by a transceiver circuit or a dedicated chip for transceiver. The processor 41 may be realized by a dedicated processing chip, a processing circuit, a processor or a general-purpose chip.

As another implementation manner, it may be considered to use a general-purpose computer to implement the communication device provided in the embodiment of the present application. The program codes to realize the functions of the processor 41 , the input port 43 and the output port 44 are stored in the memory 42 , and the general processor realizes the functions of the processor 41 , the input port 43 and the output port 44 by executing the codes in the memory 42 .

Wherein, each module or unit in the communication device 40 may be used to execute each action or processing procedure performed by the terminal device in the above method, and here, in order to avoid redundant description, its detailed description is omitted.

For the concepts, explanations, detailed descriptions and other steps involved in the device 40 related to the technical solutions provided by the embodiments of the present application, please refer to the foregoing methods or descriptions of these contents in other embodiments, and details are not repeated here.

FIG. 13 is a schematic structural diagram of a terminal device 50 provided in this application. For ease of description, FIG. 13 only shows main components of the terminal device. As shown in FIG. 13 , the terminal device 50 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. described action. The memory is mainly used for storing software programs and data, such as storing the codebook described in the above embodiments. The control circuit is mainly used for conversion of baseband signal and radio frequency signal and processing of radio frequency signal. The control circuit and the antenna can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 13 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories. A storage may also be called a storage medium or a storage device, etc., which is not limited in this embodiment of the present application.

As an optional implementation, the processor may include a baseband processor and a central processing unit, the baseband processor is mainly used to process communication protocols and communication data, and the central processor is mainly used to control the entire terminal device, execute A software program that processes data for a software program. The processor in FIG. 13 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit can also be independent processors, interconnected through technologies such as a bus. Those skilled in the art can understand that a terminal device may include multiple baseband processors to adapt to different network standards, a terminal device may include multiple central processors to enhance its processing capability, and various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit may also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

As shown in FIG. 13 , the terminal device 50 includes a transceiver unit 51 and a processing unit 52 . The transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like. Optionally, the device in the transceiver unit 51 for realizing the receiving function can be regarded as a receiving unit, and the device in the transceiver unit 51 for realizing the sending function can be regarded as a sending unit, that is, the transceiver unit 51 includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be called a receiver, receiver, receiving circuit, etc., and the sending unit may be called a transmitter, transmitter, or transmitting circuit, etc.

The terminal device shown in FIG. 13 may perform the actions performed by the terminal device in the foregoing

methods

300, 400, 600, or 700. Here, to avoid redundant description, detailed description thereof is omitted.

It should be understood that in the embodiment of the present application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processor, DSP), dedicated integrated Circuit (application specific integrated circuit, ASIC), off-the-shelf programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.

It should also be understood that the memory 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 (Electrically EPROM, EEPROM) or Flash. Volatile memory can be Random access memory (RAM), which acts as external cache memory. By way of illustration and not limitation, many forms of Random Access Memory (RAM) are available such as Static RAM (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Souble data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Access memory (Synchlink DRAM, SLDRAM) and direct memory bus random access memory (Direct rambus RAM, DR RAM).

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or other arbitrary combinations. When implemented using software, the above-described embodiments may be implemented in whole or in part in the form of computer program products. The computer program product comprises one or more computer instructions or computer programs. When the computer instruction or computer program is loaded or executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center that includes one or more sets of available media. The available media may be magnetic media (eg, floppy disk, hard disk, magnetic tape), optical media (eg, DVD), or semiconductor media. The semiconductor medium may be a solid state drive.

It should be understood that the term "and/or" in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B may mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present application. The implementation process constitutes any limitation.

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. Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here. In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

The above is only a 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. Should be covered 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

A communication method, characterized by comprising:

The terminal device receives first indication information from the network device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0,

or,

The first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0,

Wherein, the first time-frequency resource includes at least one first time slot in the time domain;

The terminal device receives a data signal on the first time-frequency resource, and the first time-frequency resource does not carry a DMRS.
The method according to claim 1, further comprising:

The terminal device acquires at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, the second time-frequency resource includes at least one second time slot in the time domain, and the second time-frequency resource includes The frequency domain resource is the same as the frequency domain resource of the first time-frequency resource, and the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period;

The terminal device demodulates the data signal according to the at least one DMRS.
The method according to claim 2, characterized in that,

The second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.
The method according to claim 2, further comprising:

The terminal device receives downlink control information, where the downlink control information is used to schedule the terminal device to receive the at least one DMRS in the second time slot.
The method according to claim 3 or 4, characterized in that,

The first indication information is also used to indicate at least one DMRS port, the at least one DMRS port is associated with the data signal carried on the first time-frequency resource, where the terminal device acquires at least one DMRS, including:

The terminal device acquires at least one DMRS of the at least one DMRS port.
A communication method, characterized by comprising:

The terminal device receives first indication information from the network device, where the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources does not bear DMRS, and the first frequency domain resource is Part of the frequency domain resources in the first time-frequency resources,

Wherein, the first time-frequency resource includes at least one first time slot in the time domain;

The terminal device receives a data signal on the first time-frequency resource.
The method of claim 6, further comprising:

The terminal device acquires at least one DMRS, the at least one DMRS is carried on a second time-frequency resource, the second time-frequency resource includes at least one second time slot in the time domain, and the second time-frequency resource includes The frequency domain resource is the same as the first frequency domain resource, and the at least one second time slot and the at least one first time slot are within an uplink and downlink time slot configuration period;

The terminal device demodulates a data signal corresponding to a first frequency domain resource in the data signal according to the at least one DMRS.
The method according to claim 7, characterized in that,

The second time slot is any time slot before the first time slot in the uplink and downlink time slot configuration period.
The method according to claim 7, wherein the method further comprises:

The terminal device receives downlink control information, where the downlink control information is used to schedule the terminal device to receive the at least one DMRS in the second time slot.
The method according to claim 8 or 9, wherein the method further comprises:

The terminal device receives second indication information, where the second indication information is used to indicate at least one DMRS port, and the at least one DMRS port is associated with the data signal carried on the first time-frequency resource, wherein the terminal The device acquires at least one DMRS, including:

The terminal device acquires at least one DMRS of the at least one DMRS port.
A communication method, characterized by comprising:

The terminal device receives first indication information from the network device, where the first indication information is used to indicate that the DMRS is not carried on the first time-frequency resource, and where the first indication information is also used to indicate the second time slot,

Wherein, the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the DMRS carried on the first time-frequency resource. The data signal is associated, the second time-frequency resource includes the second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, so The second time slot and the first time slot are within an uplink and downlink time slot configuration period;

The terminal device receives a data signal on the first time-frequency resource.
The method according to claim 11, characterized in that the method further comprises:

The terminal device obtains the DMRS carried on the second time-frequency resource;

The terminal device demodulates the data information according to the DMRS carried on the second time-frequency resource.
The method according to claim 11 or 12, characterized in that,

The second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.
A communication method, characterized by comprising:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate that the number of code division multiplexing CDM groups of DMRS not used to carry data on the first time-frequency resource is 0,

or,

The first indication information is used to indicate that the number of time-domain symbols corresponding to the DMRS on the first time-frequency resource is 0,

Wherein, the first time-frequency resource includes at least one first time slot in the time domain;

The network device sends a data signal on the first time-frequency resource.
A communication method, characterized by comprising:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate that the time-frequency resource corresponding to the first frequency domain resource among the first time-frequency resources does not bear DMRS, and the first frequency domain resource is the first frequency domain resource. Part of the frequency domain resources in the time-frequency resources,

Wherein, the first time-frequency resource includes at least one first time slot in the time domain;

The network device sends a data signal on the first time-frequency resource.
A communication method, characterized by comprising:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate that the DMRS is not carried on the first time-frequency resource, and where the first indication information is also used to indicate the second time slot,

Wherein, the first time-frequency resource includes a first time slot in the time domain, and the DMRS carried on the second time-frequency resource corresponding to the second time slot is the same as the DMRS carried on the first time-frequency resource. The data signal is associated, the second time-frequency resource includes the second time slot in the time domain, and the frequency domain resource of the second time-frequency resource is the same as the frequency domain resource of the first time-frequency resource, so The second time slot and the first time slot are within an uplink and downlink time slot configuration period;

The network device sends a data signal on the first time-frequency resource.
The method according to claim 16, further comprising:

The network device sends the DMRS carried on the second time-frequency resource to the terminal device.
The method according to claim 16 or 17, characterized in that,

The second time slot is a time slot before the first time slot in the uplink and downlink time slot configuration period.
A communication device, characterized by comprising a module for performing the method according to any one of claims 1-18.
A communication device, characterized in that,

Comprising a processor and a memory; the memory is used to store one or more computer programs, and when the one or more computer programs are executed, the method according to any one of claims 1 to 5 is performed, Or causing the method described in any one of claims 6-10 to be executed, or causing the method described in any one of claims 11-13 to be executed.
A communication device, characterized in that,

Comprising a processor and a memory; the memory is used to store one or more computer programs that, when executed, cause the method as claimed in claim 14 to be performed, or cause the method as claimed in claim 15 to be performed. The method described is carried out, or the method according to any one of claims 16-18 is caused to be carried out.
A computer-readable storage medium, characterized in that,

The computer-readable storage medium is used to store a computer program, and when the computer program is run on a computer, the computer is made to perform the method according to any one of claims 1-5, or the computer is made to perform The method according to any one of claims 6-10, or causing the computer to execute the method according to any one of claims 11-13.
A computer-readable storage medium, characterized in that,

The computer-readable storage medium is used to store a computer program, and when the computer program is run on a computer, the computer is made to perform the method according to claim 14, or the computer is made to perform the method according to claim 15. method, or causing the computer to execute the method according to any one of claims 16-18.
A computer program product, characterized in that,

The computer program product includes: computer program code, when the computer program code is executed, the method according to any one of claims 1-5 is realized, or the method according to any one of claims 6-10 is realized. described method, or implement the method as described in any one of claims 11-13.
A computer program product, characterized in that,

Said computer program product comprises: computer program code, when said computer program code is executed, realizes the method as claimed in claim 14, or realizes the method as claimed in claim 15, or realizes the method as claimed in claims 16-18 any one of the methods described.