CN116266778A

CN116266778A - Communication method and device

Info

Publication number: CN116266778A
Application number: CN202111553315.5A
Authority: CN
Inventors: 王�锋; 郭志恒; 张旭
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2023-06-20

Abstract

The application provides a communication method and a communication device, which are used for providing a fast and effective scheme for indicating to enable and disable transmission precoding. The method comprises the following steps: receiving Radio Resource Control (RRC) signaling from a network device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries; and determining whether transmission precoding is enabled or not according to the second entry. By combining RRC signaling and DCI to determine whether to enable transmission precoding, the bit overhead of DCI is not required to be additionally increased, bit of DCI is effectively utilized, and quick and dynamic enabling and disabling of transmission precoding are realized.

Description

Communication method and device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a communications method and apparatus.

Background

In the process of communication between the terminal and the network device, in order to better improve the communication quality, a Precoding (Precoding) technology is often adopted, and the terminal can decide whether to enable transmission Precoding according to the indication of the network device when uplink transmission is performed.

Currently, the manner of determining whether to enable transmission precoding is mainly that the terminal determines whether to enable transmission precoding through a higher layer parameter, for example, whether the network device modifies transmission precoding through a radio resource control (radio resource control, RRC) re-formulation, but the manner of indicating whether transmission precoding is enabled is less system efficient.

In summary, there is currently no fast and efficient method for indicating to enable and disable transmission precoding during communication.

Disclosure of Invention

The application provides a communication method, a communication device and a communication system, which are used for providing a fast and effective scheme for indicating to enable and disable transmission precoding.

The communication method provided in the first aspect may be performed by a terminal device, where the terminal device may be abstracted as a computer system. The terminal device may be a complete machine, or may be a part of devices in the complete machine, for example: a system chip or a processing chip. The system-on-chip may also include a system-on-chip (SOC), or SOC chip, among others.

The following describes an example in which an execution subject is a terminal device.

The embodiment of the application provides a communication method, which comprises the following steps:

Receiving Radio Resource Control (RRC) signaling from a network device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries; and determining whether transmission precoding is enabled or not according to the second entry.

By the method, the embodiment of the application combines the RRC signaling and the DCI to determine whether to enable the transmission precoding, does not need to additionally increase bit overhead of the DCI, effectively utilizes bit of the DCI, and realizes quick and dynamic enabling and disabling of the transmission precoding.

In one possible design, the first entry further includes information indicating a domain of time frequency.

In one possible design, the first indication field includes a time domain resource allocation, TDRA, indication field.

In one possible design, the second entry is determined from the first indication field and a second indication field in the DCI; the second indication domain comprises an antenna port indication domain, a precoding information and layer number indication domain, a sequence initialization indication domain and one or more of a phase tracking reference signal and a demodulation reference signal indication domain.

Through the method, the embodiment of the application also provides a method for determining the second item, for example, the second item can be determined by combining the first indication domain and the second indication domain together, and the applicability is higher.

In one possible design, the second entry is determined from the first indication field and the highest first length bit in the second indication field; wherein the first length is the difference between the second length and the third length; the second length is a length of a field of a physical downlink control channel PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and is not enabled to perform transmission precoding; the third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is enabled.

By the above method, the embodiments of the present application further provide a way how to determine the second entry in conjunction with the first indication field and the second indication field, for example, determining the second entry according to the bits of the highest first length in the first indication field and the second indication field. In addition, the embodiment of the application also provides a way for determining the first length, for example, the first length is determined according to the difference between the second length and the third length.

In one possible design, the second entry is determined from the first indication field and the highest first length bit in the second indication field; the first length is determined according to third indication information carried in the RRC signaling or DCI, where the third indication information is used to indicate a size of the first length.

By the method, the embodiment of the application also provides another way of determining the first length, for example, according to the third indication information in the RRC signaling.

In one possible design, the RRC signaling further includes second indication information, where the second indication information is used to indicate whether the terminal device is allowed to perform dynamic enabled transmission precoding.

By means of the method, the embodiment of the application provides a premise that the terminal equipment determines whether to enable transmission precoding, for example, after the terminal equipment receives the second indication information indicating that the terminal equipment is allowed to dynamically enable transmission precoding, the terminal equipment can combine RRC signaling and DCI to determine whether to enable transmission precoding, so that unnecessary signaling overhead can be effectively reduced.

In one possible design, when the terminal device is allowed to dynamically enable transmission precoding, a length of a field of a physical downlink control channel PDCCH carrying the DCI is equal to the second length; or when the terminal equipment is allowed to dynamically enable transmission precoding, the length of a field of the PDCCH carrying the DCI is the largest length of a third length and the second length; the second length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and is not enabled to perform transmission precoding; the third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is enabled.

By the above method, the embodiment of the present application provides a method for setting a length of a field of a PDCCH carrying the DCI in a scenario in which the terminal device is allowed to dynamically enable transmission precoding, for example, in the scenario, setting a length of a field of a PDCCH carrying the DCI to be a second length, or setting a length of a field of a PDCCH carrying the DCI to be a maximum length of a third length and the second length.

In one possible design, when there is indication information in the at least one first entry that enables transmission of precoding, a bit of a highest first length of the PDCCH field is zero; or when the second indication information indicates that the terminal equipment is allowed to dynamically enable transmission precoding, the bit of the highest first length of the PDCCH field is zero.

By the method, the problem that the field length of the PDCCH carrying the DCI is not uniform due to whether the transmission precoding is enabled or not under the scene of allowing the terminal equipment to dynamically enable the transmission precoding can be effectively avoided.

The communication method provided by the second aspect may be performed by a network device, where the network device may be abstracted as a computer system. The network device may be a complete machine, or may be a part of devices in the complete machine, for example: a system chip or a processing chip. The system-on-chip may also include a system-on-chip (SOC), or SOC chip, among others.

The following describes an example in which the execution body is a network device.

transmitting Radio Resource Control (RRC) signaling to a terminal device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises indication information for indicating whether transmission precoding is enabled or not; and sending Downlink Control Information (DCI) to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

In one possible design, a second indication field in the DCI is used to determine the second entry in conjunction with the first indication field; the second indication domain comprises an antenna port indication domain, a precoding information and layer number indication domain, a sequence initialization indication domain and one or more of a phase tracking reference signal and a demodulation reference signal indication domain.

In one possible design, when there is indication information enabling transmission of precoding in the at least one first entry, a bit of a highest first length of a field carrying a physical downlink control channel PDCCH of the DCI is set to zero; or when the second indication information indicates that the terminal equipment is allowed to perform dynamic enabled transmission precoding, setting the bit of the highest first length of the field of the PDCCH carrying the DCI to zero.

In one possible design, the RRC signaling further includes second indication information, where the third indication information is used to indicate a size of the first length.

By the method, the embodiment of the application provides a way for the terminal equipment to determine the first length, for example, according to the third indication information in the RRC signaling. In one possible design, the method further comprises: when the terminal equipment meets a first condition, setting the proportion of enabling transmission precoding to be larger than the proportion of not enabling transmission precoding; the first condition includes that the number of link failures of the terminal equipment exceeds a threshold number, and the residual power reported by the terminal equipment is smaller than one or more of the threshold powers.

The communication method provided in the third aspect may be performed by a terminal device, where the terminal device may be abstracted as a computer system. The terminal device may be a complete machine, or may be a part of devices in the complete machine, for example: a system chip or a processing chip. The system-on-chip may also include a system-on-chip (SOC), or SOC chip, among others.

receiving Radio Resource Control (RRC) signaling from a network device, wherein the RRC signaling comprises at least one first entry, and an identification of the first entry is used for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; determining the identification of the selected first item according to a first indication field in the DCI; and determining whether the selected first item enables transmission precoding according to the identification of the first item and the corresponding relation of whether the transmission precoding is enabled.

By the above method, the embodiments of the present application further provide a way how to determine the second entry in conjunction with the first indication field and the second indication field, for example, determining the second entry according to the bits of the highest first length in the first indication field and the second indication field.

In one possible design, when the terminal device is allowed to dynamically enable transmission precoding, the length of the field of the physical downlink control channel PDCCH is equal to a second length, where the second length is the length of the field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is not enabled.

By the method, the embodiment of the application provides a method for setting the length of the field of the PDCCH carrying the DCI in a scenario where the terminal equipment is allowed to dynamically enable transmission precoding, for example, in the scenario, the length of the field of the PDCCH carrying the DCI is set to be a second length.

In a fourth aspect, embodiments of the present application provide a communications device, where the communications device is configured to implement any one of the methods of the first aspect or the third aspect, and includes a corresponding functional module or unit configured to implement the steps in the methods of the first aspect or the third aspect, respectively. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software, where the hardware or software includes one or more modules or units corresponding to the functions described above.

In a fifth aspect, embodiments of the present application provide a communications device, where the communications device is configured to implement any one of the methods of the second aspect, and includes a corresponding functional module or unit configured to implement the steps of the method of the second aspect. The functions may be implemented by hardware, or may be implemented by hardware executing corresponding software, where the hardware or software includes one or more modules or units corresponding to the functions described above.

In a sixth aspect, a communications apparatus is provided that includes a processor and a memory. Wherein the memory is used for storing a computing program or instructions, and the processor is coupled with the memory; the computer program or instructions, when executed by a processor, cause the apparatus to perform any of the methods of the first or third aspects described above. The communication means may be a terminal device or a device capable of supporting the terminal device to implement the functions required for the method provided in the first aspect described above, such as a chip system. For example, the communication means may be the terminal device or a part of a component (such as a chip) within the terminal device. The terminal device may be, for example, an intelligent mobile terminal, an intelligent home device, an intelligent car, an intelligent wearable device, etc. Among them, intelligent mobile terminals such as cellular phones, tablet computers, notebook computers, ultra-mobile personal computers (ultra-mobile personal computer, UMPC), netbooks, personal digital assistants (personal digital assistant, PDA), etc. Smart home appliances such as smart refrigerators, smart washing machines, smart televisions, speakers, etc. Intelligent car wearing equipment such as intelligent earphone, intelligent glasses, intelligent dress or shoes etc..

In a seventh aspect, a communications apparatus is provided that includes a processor and a memory. Wherein the memory is used for storing a computing program or instructions, and the processor is coupled with the memory; the computer program or instructions, when executed by a processor, cause the apparatus to perform any of the methods of the second aspect described above. The communication means may be a network device or a device capable of supporting the functionality required by the network device to implement the method provided in the second aspect described above, such as a chip system. For example, the communication means may be the terminal device or a part of a component (such as a chip) within the terminal device. The network device may include AN Access Network (AN) device, a radio access network (radio access network, RAN) device, and AN access network device, such as a base station (e.g., AN access point), may refer to a device in the access network that communicates over the air with wireless terminal devices through one or more cells. The base station may be configured to inter-convert the received air frames with Internet Protocol (IP) packets as a router between the terminal device and the rest of the access network, which may include an IP network. The network side device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (NodeB or eNB or e-NodeB, evolved Node B) in a long term evolution (long term evolution, LTE) system or advanced, LTE-a, system, or may also include a next generation Node B (next generation Node B, gNB) or a next generation evolved base station (next generation evolved nodeB, ng-eNB), en-gNB (enhanced next generation Node B, gNB) in a fifth generation mobile communication technology (the 5th generation,5G) new air interface (new radio, NR) system: enhanced next generation base stations; centralized Units (CUs) and Distributed Units (DUs) in a Cloud access network (Cloud radio access network, cloud RAN) system may also be included, or relay devices may also be included, and embodiments of the present application are not limited.

An eighth aspect provides a terminal, the terminal may comprise the apparatus of any one of the third or fifth aspects. Alternatively, the device may be an intelligent home device, an intelligent manufacturing device, an intelligent transportation device, etc., such as a vehicle, an unmanned aerial vehicle, an unmanned transportation vehicle, an automobile, a vehicle, etc., or a robot, etc. Alternatively, the device may be a mouse, keyboard, wearable device, TWS headset, or the like.

In a ninth aspect, the present application provides a chip, the chip being connected to a memory, for reading and executing a computer program or instructions stored in the memory, to implement the method in any one of the possible implementations of the first or third aspect; or to implement the method in any one of the possible implementations of the second aspect described above.

In a tenth aspect, there is provided a computer readable storage medium having stored therein a computer program or instructions which, when executed by an apparatus, cause the apparatus to perform the method of any of the possible implementations of the first or third aspects described above, or cause the apparatus to perform the method of any of the possible implementations of the second aspect described above.

In an eleventh aspect, the present application provides a computer program product comprising computer programs or instructions which, when executed by an apparatus, cause the apparatus to perform the method of any of the possible implementations of the first or third aspect described above, or cause the apparatus to perform the method of any of the possible implementations of the second aspect described above.

In a twelfth aspect, the present application provides a communication system, the system comprising a terminal device and a network device;

the terminal device is configured to receive radio resource control RRC signaling from the network device, where the RRC signaling includes at least one first entry, and the first entry includes indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries; determining whether transmission precoding is enabled according to the second entry;

the network device is configured to send radio resource control RRC signaling to the terminal device, where the RRC signaling includes at least one first entry, and the first entry includes indication information for indicating whether transmission precoding is enabled; and sending Downlink Control Information (DCI) to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

Technical effects that may be achieved by the various designs in the fourth aspect to the twelfth aspect are described with reference to the technical effects of the corresponding designs in the first aspect to the third aspect, and the detailed description is not repeated here.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a flowchart of a communication method provided in an embodiment of the present application;

fig. 3 is a schematic diagram of a first communication scenario provided in an embodiment of the present application;

fig. 4 is a schematic diagram of a second communication scenario provided in an embodiment of the present application;

FIG. 5 is a flowchart of another communication method according to an embodiment of the present application;

fig. 6 is a schematic diagram of a first communication device according to an embodiment of the present application;

fig. 7 is a schematic diagram of a second communication device according to an embodiment of the present application;

fig. 8 is a schematic diagram of a terminal device provided in an embodiment of the present application.

Detailed Description

First, technical features related to embodiments of the present application are described.

At present, in the process of communication between a terminal and a network device, in order to better improve the communication quality, a Precoding (Precoding) technology is often adopted, and when uplink transmission is performed, the terminal can decide whether to enable transmission Precoding according to the indication of the network device.

The existing method for determining whether to enable transmission precoding is mainly that the terminal determines whether to enable transmission precoding through a higher layer parameter, for example, the network device modifies whether to enable transmission precoding through a radio resource control (radio resource control, RRC) re-formulation, but the method for indicating whether to enable transmission precoding is low in system efficiency.

Further, when communication transmission is performed, a bit (bit) size of a portion of the DCI indication field may vary depending on whether transmission precoding is enabled.

For example, the precoding information and the number of layers (precoding information and number of layers) in the DCI indicate that the size of the domain or TPMI indicate the domain is related to parameters such as the number of ports, maximum rank size, coherence, transmission precoding, etc.

As shown in table 1 below, when the number of ports is 4, the maximum rank is 2 or 3 or 4, and the transmission precoding is not enabled, the number of precoding information and the number of layer indication fields bit is 4,5 or 6, respectively.

Table 1 number of transmit antenna ports=4, maximum number of transmission layers=2/3/4, transmission precoding is disabled

As shown in table 2 below, when the port number is 4, the transmission precoding is not enabled and the maximum rank is 1, or the transmission precoding is enabled, the precoding information and the number of layer indication fields bit number are 2,4 or 5.

Table 2 number of transmit antenna ports = 4, transmit precoding disabled and maximum rank 1, or transmit precoding enabled

As shown in table 3 below, when the number of ports is 2 and the maximum rank is 2 and transmission precoding is not enabled, the number of precoding information and layer number indication fields bit is 2 or 4.

Table 3 number of transmit antenna ports=2, maximum number of transmission layers=2, transmission precoding is disabled

As shown in table 4 below, when the port number is 2, the transmission precoding is not enabled and the maximum rank is 1, or the transmission precoding is enabled, the precoding information and the number of layers indicate that the domain bit number is 1 or 3.

Table 4 number of transmit antenna ports = 2, transmit precoding disabled and maximum rank 1, or transmit precoding enabled

It can be seen that, in the scenario that the port number is 4 ports and the maximum rank=1, when the transmission precoding is not enabled, the bit number of the precoding information and the layer number indication domain is equal to the bit number of the transmission precoding enabled; in the scene that the port number is 4 ports and the maximum rank is greater than 1, when the transmission precoding is not enabled, the bit number of the precoding information and layer number indication domain is different from that of the transmission precoding enabled by 1bit or 2bit; in a scenario that the port number is 2 ports and the maximum rank=1, when the transmission precoding is not enabled, the bit number of the precoding information and the layer number indication domain is equal to the bit number of the transmission precoding enabled; in the scene that the port number is 2 ports and the maximum rank is greater than 1, when the transmission precoding is not enabled, the bit number of the precoding information and layer number indication domain is different from the bit number of the transmission precoding enabled, and the bit number of the precoding information and layer number indication domain is 1bit.

Therefore, it is possible to derive the bit phase difference of 0bit or 1bit or 2bit based on the transmission precoding information and the layer number indication field when the transmission precoding is enabled.

For another example, an antenna port (antenna ports) in DCI indicates whether a size of a field is enabled for transmission precoding, a demodulation reference signal (demodulation reference signal, DMRS) type (type), and a DMRS maximum length.

When the DMRS-Type is 1, the maximum length of the DMRS is 1 and the transmission precoding is enabled, the bit number of the antenna port indication domain is 2 bits, and when the DMRS-Type is 1, the maximum length of the DMRS is 1 and the transmission coding is not enabled, the bit number of the antenna port indication domain is 3 bits. When the DMRS-Type is 1, the maximum length of the DMRS is 2 and the transmission precoding is enabled, the bit number of the antenna port indication domain is 4 bits, and when the DMRS-Type is 1, the maximum length of the DMRS is 2 and the transmission coding is not enabled, the bit number of the antenna port indication domain is 4 bits.

Wherein, it can be seen whether the transmission precoding is enabled, the antenna port indicates the bit phase difference 0bit or 1bit of the domain.

For another example, the size of the phase tracking reference signal and demodulation reference signal (PTRS-DMRS association) indication field in DCI is 0bit when transmission precoding is enabled, 0bit when transmission precoding is not enabled and PTRS uplink configuration parameters are not configured, 0bit when maximum rank is equal to 1, and 2 bits otherwise.

Wherein, it can be seen whether the transmission precoding is enabled, the phase tracking reference signal and the demodulation reference signal indicate bit phase difference of 0bit or 2bit of the domain.

For another example, DMRS sequence initialization (sequence initialization) in DCI indicates the size of a field, which is 0bit when transmission precoding is enabled and 1bit when transmission precoding is not enabled.

When the transmission precoding is enabled, the DMRS sequence initializes bit phase difference 1bit of the indication field.

Therefore, in the scenario that the terminal device dynamically enables transmission precoding, a problem that whether the field length of the PDCCH carrying the DCI caused by the transmission precoding is enabled is not uniform often occurs.

Based on this, the embodiments of the present application provide two communication methods and apparatuses, which are used to solve the problem that there is no method for quickly and effectively indicating to enable and disable transmission precoding in the communication process at present. The method and the device are based on the same inventive concept, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

Next, a scenario to which the embodiments of the present application may be applied is described. The technical solution of the embodiment of the application can be applied to various communication systems, for example: long term evolution (long term evolution, LTE) systems, future fifth generation (5th Generation,5G) systems, such as new generation radio access technologies (new radio access technology, NR), and future communication systems, such as 6G systems, etc.

Taking a 5G system (also referred to as a new radio system) as an example, the communication method provided in the present application may be applied to a fast moving scenario of a terminal device, or a scenario in which the terminal device needs to switch between a Cyclic Prefix orthogonal frequency division multiplexing (CP-OFDM) waveform and a discrete-Fourier-transform-spread-OFDM (DFT-s-OFDM) waveform, or a scenario in which the terminal device is located at a junction between a cell edge and a cell middle, etc.

For the sake of understanding the embodiments of the present application, a communication system to which the embodiments of the present application are applied will be described in detail first with reference to the communication system shown in fig. 1 as an example. As shown in fig. 1, the communication system includes a terminal device 100 and a network device 101.

One network device may serve one or more terminal devices, of which fig. 1 only exemplifies one. It should be understood that fig. 1 is a simplified schematic diagram for ease of understanding only, and that other network devices or other terminal devices may be included in the communication system, which are not shown in fig. 1.

Terminal device 100 includes devices that provide voice and/or data connectivity to a user, and in particular, includes devices that provide voice to a user, or includes devices that provide data connectivity to a user, or includes devices that provide voice and data connectivity to a user. For example, may include a handheld device having wireless connectivity, or a processing device connected to a wireless modem. The terminal device may communicate with the core network via a radio access network (radio access network, RAN), exchange voice or data with the RAN, or interact voice and data with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device (D2D) terminal device, a vehicle-to-all (vehicle to everything, V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (internet of things, ioT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station, an Access Point (AP), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), or a user equipment (user device), etc. For example, mobile telephones (or "cellular" telephones) computers with mobile terminal devices, portable, pocket, hand-held, computer-built mobile devices, and the like may be included. Such as personal communication services (personal communication service, PCS) phones, cordless phones, session initiation protocol (session initiation protocol, SIP) phones, wireless local loop (wireless local loop, WLL) stations, personal digital assistants (personal digital assistant, PDAs), and the like. But also limited devices such as devices with lower power consumption, or devices with limited memory capabilities, or devices with limited computing capabilities, etc. Examples include bar codes, radio frequency identification (radio frequency identification, RFID), sensors, global positioning systems (global positioning system, GPS), laser scanners, and other information sensing devices.

By way of example, and not limitation, in embodiments of the present application, the terminal device may also be a wearable device. The wearable device can also be called as a wearable intelligent device or an intelligent wearable device, and is a generic name for intelligently designing daily wear and developing wearable devices, such as glasses, gloves, watches, clothes, shoes, and the like, by applying wearable technology. The wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also can realize a powerful function through software support, data interaction and cloud interaction. The generalized wearable intelligent device includes full functionality, large size, and may not rely on the smart phone to implement complete or partial functionality, such as: smart watches or smart glasses, etc., and focus on only certain types of application functions, and need to be used in combination with other devices, such as smart phones, for example, various smart bracelets, smart helmets, smart jewelry, etc. for physical sign monitoring.

In the embodiment of the application, the terminal device may further include a relay (relay). Alternatively, it is understood that all of the base stations capable of data communication can be regarded as terminal devices.

In the embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device, or may be a device that is applied to the terminal device and is capable of supporting the terminal device to implement the function, for example, a component or an assembly having a communication function, or a chip system, and the device may be installed in the terminal device. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the terminal is a terminal device, which is described in the embodiments of the present application as an example.

The network device 101, for example, comprises AN Access Network (AN) device, such as a base station (e.g., AN access point), may refer to a device in the access network that communicates over the air with terminal devices through one or more cells. The network devices may include an evolved base station (NodeB or eNB or e-NodeB, evolutional Node B) in a long term evolution (long term evolution, LTE) system or LTE-advanced (long term evolution-advanced, LTE-a), or may also include a next generation node B (next generation node B, gNB) in a fifth generation mobile communication technology (the 5th generation,5G) NR system (also simply referred to as NR system) or may also include a Centralized Unit (CU) and/or a Distributed Unit (DU) in a Cloud access network (Cloud radio access network, cloud RAN) system, as embodiments of the present application are not limited. For example, the network device may be a CU in a cloudran system, or a DU, or an ensemble of a CU and a DU.

The network device may also comprise a core network device comprising, for example, access and mobility management functions (access and mobility management function, AMF) or the like. In this embodiment of the present application, since the access network is mainly referred to, the network devices refer to access network devices unless otherwise specified hereinafter.

In the embodiment of the present application, the means for implementing the function of the network device may be the network device, or may be a means capable of supporting the network device to implement the function, for example, a chip system, and the apparatus may be installed in the network device. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the network device is exemplified by the network device, and the technical solution provided in the embodiments of the present application is described.

The network architecture and the service scenario described in the embodiments of the present application are for more clearly describing the technical solution of the embodiments of the present application, and do not constitute a limitation on the technical solution provided in the embodiments of the present application, and those skilled in the art can know that, with the evolution of the network architecture and the appearance of the new service scenario, the technical solution provided in the embodiments of the present application is also applicable to similar technical problems. It should be understood that fig. 1 is a simplified schematic diagram for ease of understanding only, and that other network devices or other terminal devices may be included in the communication system, which are not shown in fig. 1.

When the communication system in the embodiment of the present application performs the communication transmission method, the method performed by the terminal device 100 in the communication system may be specifically performed by a chip in the terminal device 100; the method performed by the network device 101 in the communication system may in particular be performed by a chip in the network device 101.

Some terms involved in the embodiments of the present application are explained below to facilitate understanding.

1) A physical downlink control channel (physical downlink control channel, PDCCH) in the embodiments of the present application is used to carry scheduling and other control information, at least for one or more of the following various functions:

a. downlink scheduling information, also referred to as downlink allocation (downlink assignment) information, is transmitted to the terminal device, and includes transmission parameters of the physical downlink shared channel (physical downlink shared channel, PDSCH) so that the terminal device receives the PDSCH. The PDSCH is used for bearing downlink data sent by the network equipment to the terminal equipment;

b. and sending uplink scheduling information to the terminal equipment, wherein the uplink scheduling information is also called uplink grant (uplink grant) information, and the uplink scheduling information comprises transmission parameters of a physical uplink shared channel (physical uplink shared channel, PUSCH) so that the terminal equipment can send the PUSCH to the network equipment. Wherein the PUSCH is used for carrying uplink data sent by the terminal device to the network device;

c. Transmitting an aperiodic channel quality indication (channel quality indicator, CQI) reporting request;

d. transmitting an uplink power control command, wherein the uplink power control command is used for determining the transmission power of an uplink channel by a terminal device;

e. carrying information about the hybrid automatic repeat request (hybrid automatic repeat request, HARQ);

f. carrying radio network temporary identity (radio network temporary identifier, RNTI) information for masking cyclic redundancy check (cyclic redundancy check, CRC) etc. so as to determine whether a PDCCH transmitted by the network device is addressed to itself according to the RNTI information when the terminal device performs CRC.

The information carried by the PDCCH may be referred to as downlink control information (downlink control information, DCI), and in general, a PDCCH carries DCI with one format scrambled by an RNTI, where the information carried by the DCI may be different according to a DCI format (format) and/or a higher layer signaling (e.g., RRC signaling) configuration.

2) The DCI in the embodiment of the present application may indicate cell-level information, such as downlink control information that instructs a terminal device to scramble using a system message radio network temporary identifier (system information, radio network temporary identifier, RNTI, SI-RNTI), paging RNTI (P-RNTI), or random access RNTI (RA-RNTI).

The DCI may also indicate terminal device-level information, such as downlink control information indicating that the terminal device scrambles using a cell RNTI (cell RNTI, C-RNTI), a configuration scheduling RNTI (configured scheduling RNTI, CS-RNTI), a modulation coding scheme C-RNTI (modulation and coding scheme C-RNTI, MCS-C-RNTI), or semi-persistent CSI RNTI (SP CSI-RNTI).

The DCI may also indicate information of a group common level, such as downlink control information indicating a slot format RNTI (slot format indication RNTI, SFI-RNTI), an interrupt RNTI (interrupt RNTI, INT-RNTI), a PUSCH transmission power control RNTI (Transmit Power Control-PUSCH-RNTI, TPC-PUSCH-RNTI), a PUCCH transmission power control RNTI (Transmit Power Control-PUCCH-RNTI, TPC-PUCCH-RNTI), or a transmission power control RNTI (Transmit Power Control-Sounding Reference Symbols-RNTI, TPC-SRS-RNTI) of a sounding reference signal.

3) The precoding in the embodiment of the application generally occurs together with a Multiple Input Multiple Output (MIMO) technology, which is used for reducing the complexity of implementing the receiver to eliminate the influence between channels, reducing the system overhead and maximally improving the system capacity of the MIMO.

For example, in a MIMO system, the baseband may perform preprocessing on data to be transmitted by using a precoding technology, so that data transmitted by the base station may be transmitted to users in a cell with more directionality.

4) The radio resource control (Radio Resource Control, RRC) in the embodiments of the present application is used to process the third layer information of the control plane between UE enodebs.

5) The CP-OFDM in the embodiment of the present application refers to OFDM based on cyclic prefix, which has advantages of using discontinuous frequency domain resources, flexible resource allocation, and large frequency diversity gain, and has disadvantages of higher peak-to-average power ratio (Peak to Average Power Ratio, PAPR).

6) In the DFT-s-OFDM in the embodiment of the present application, the DFT spreading is performed on the signal before the IFFT modulation of the OFDM, so that when the system transmits the time domain signal, the problem of PAPR (peak to average ratio) caused by the OFDM system transmitting the frequency domain signal can be avoided. The PAPR level can approach to a single carrier, and can transmit higher power; the disadvantage is that there is a constraint on the frequency domain resources and only continuous frequency domain resources can be used.

Alternatively, in the present application, enabling transmission precoding may be understood as using DFT-s-OFDM technology at the time of transmission; disabling transmission precoding is understood to mean that the DFT-s-OFDM technique is not used at the time of transmission, but the CP-OFDM technique is used.

By introducing the communication system in the embodiment of the present application, a specific description is given below for a communication process.

As shown in fig. 2, an embodiment of the present application provides a communication method, where an execution body of the method may be a communication device (such as a terminal device or a network device), or may be a chip or a circuit, and a specific flow includes:

s200, the network device sends RRC signaling to the terminal device, where the RRC signaling includes at least one first entry, and the first entry includes first indication information for indicating whether to enable transmission precoding.

Optionally, at least one of the optional first entries included in the RRC signaling in the embodiment of the present application is indication information for indicating whether transmission precoding is enabled.

For example, assume that the RRC signaling in the embodiment of the present application includes 5 optional first entries, which are first entry 1, first entry 2, first entry 3, first entry 4, and first entry 5, respectively. Wherein the first indication information in the first entry 1 and the first entry 2 indicates that transmission precoding is not enabled; the first indication information in the first entry 3, the first entry 4 and the first entry 5 indicates that transmission precoding is enabled.

Thus, when the first entry indicated by the network device is either first entry 1 or first entry 2, indicating that transmission precoding is not enabled; when the first entry indicated by the network device is the first entry 3, the first entry 4 or the first entry 5, the indication indicates that transmission precoding is enabled.

For a better understanding of the embodiments of the present application, the following illustrates the content of the first entry included in the RRC signaling:

the first list of entries contained in the RRC signaling is assumed to be a PUSCH time domain resource allocation list (time domain resource allocation list).

Wherein the first entry list includes 2 PUSCH time domain resource allocation entries, and each PUSCH time domain resource allocation entry may include first indication information for indicating whether transmission precoding is enabled; and/or the first entry list includes 2 PUSCH allocation entries, and each PUSCH allocation entry may include first indication information therein for indicating whether transmission precoding is enabled.

For example, the content of the first list of entries may be as follows:

in the embodiment of the present application, the first indication information has various expression forms, which are not limited to the following specific forms:

expression form 1: the first indication information is a binary value.

In this embodiment of the present application, two binary values may be preset, which are a first binary value and a second binary value, where the first binary value indicates that the transmission precoding is enabled, and the second binary value indicates that the transmission precoding is not enabled.

For example, assume that the first binary value is 0100 and the second binary value is 1010. When the first entry indicated by the network device includes "0100", indicating that transmission precoding is enabled; when "1010" is included in the first entry indicated by the network device, it is indicated that transmission precoding is not enabled.

Expression form 2: the first indication information is a piece of text content, wherein the information in the text content is not limited to Chinese or English.

For example, when the first entry indicated by the network device includes text content "Yes/Ture/Support", indicating that transmission precoding is enabled; when the first entry indicated by the network device includes the text content "No/False", it is indicated that transmission precoding is not enabled.

Optionally, the RRC signaling in the embodiment of the present application may further include second indication information, where the second indication information is used to indicate whether to allow the terminal device to perform dynamic enabled transmission precoding.

In the case that the RRC signaling further includes second indication information, it may be understood that, if the second indication information included in the RRC signaling indicates that the terminal device is allowed to perform dynamic enabling transmission precoding, the first entry includes first indication information for indicating whether to enable transmission precoding; if the second indication information included in the RRC signaling indicates that the terminal device is not allowed to dynamically enable transmission precoding, the first entry may not include first indication information for indicating whether to enable transmission precoding.

Similarly, when the RRC signaling received by the terminal device includes second indication information, and the second indication information indicates that the terminal device is allowed to perform dynamic enabling transmission precoding, the terminal device may determine whether to enable transmission precoding by combining the RRC signaling and DCI; when the RRC signaling received by the terminal device includes the second indication information and the second indication information indicates that the terminal device is not allowed to dynamically enable transmission precoding, the terminal device may not need to combine the RRC signaling and the DCI to determine whether to enable transmission precoding.

By the method, the terminal equipment can determine whether the transmission precoding is enabled or not according to the second indication information and whether the RRC signaling is combined with the DCI, and unnecessary signaling overhead can be effectively reduced.

Further, in the embodiment of the present application, the network device may adjust, according to the actual situation, the proportion, or the number of the first entries indicating the first entry capable of transmitting precoding in the optional first entries included in the RRC signaling.

Alternatively, the network device may, when determining that the first condition is met, adjust up a proportion of the optional first entry included in the RRC signaling, where the proportion is used to indicate that the first entry is capable of transmitting precoding.

For example, the ratio of the optional first entry for indicating that the transmission precoding is enabled is higher than the ratio of the optional first entry for indicating that the transmission precoding is not enabled.

The first conditions in the embodiments of the present application include, but are not limited to, the following:

condition 1: the network device receives first information sent by the terminal device, wherein the first information is used for requesting to enable transmission precoding.

Illustratively, assuming that the network device receives the first information transmitted from the terminal device before performing step S200, the network device determines that the first condition is satisfied.

Thus, when configuring RRC signaling, the network device may set the proportion of the first entry for indicating that precoding is enabled to be transmitted higher than the proportion of the first entry for indicating that precoding is not enabled to be transmitted in the optional first entry included in the RRC signaling.

Condition 2: the network device determines that the number of terminal device link failures exceeds a threshold number.

For example, assuming that the threshold number of times is 5, the network device determines that the number of link failures of the terminal device has reached 6 times before executing step S200, and the network device determines that the number of link failures of the terminal device exceeds the threshold number of times, thereby satisfying the first condition.

Condition 3: the network device determines that the residual power reported by the terminal device is smaller than the threshold power.

For example, assuming that the threshold power is 6dBm, the network device determines that the remaining power reported by the terminal device is 3dBm before executing step S200, and the network device determines that the remaining power reported by the terminal device is less than the threshold power, thereby satisfying the first condition.

S201, the terminal equipment receives the RRC signaling.

Further, in the embodiment of the present application, the terminal device may determine whether to allow the terminal device to dynamically enable transmission precoding according to the indication of the network device.

The embodiments of the present application may have different manners of determining whether to allow dynamic enabling of transmission precoding based on different situations, and are described below based on different situations:

Case 1: when the RRC signaling carries the second indication information, the terminal device may determine whether to allow dynamic enabled transmission precoding according to the second indication information.

Optionally, in this embodiment of the present application, the content of the second indication information may be a binary value of 0 or 1, and may also be "False" or "tube", where when the content of the second indication information is 1 or tube, it may indicate that the terminal device is allowed to perform dynamic enabling transmission precoding, and when the content of the second indication information is 0 or False, it may indicate that the terminal device is not allowed to perform dynamic enabling transmission precoding.

For example, when the terminal device determines that the RRC signaling includes the second indication information and the content of the second indication information is 1 and/or more, the terminal device determines that the dynamic enabled transmission precoding is allowed, and may determine whether to enable the transmission precoding in combination with the RRC signaling and the DCI; when the terminal device determines that the RRC signaling includes the second indication information and the content of the second indication information is 0 and/or False, the terminal device determines that the dynamic enabled transmission precoding is not allowed, and may not need to perform an operation of determining whether to enable the transmission precoding in combination with the RRC signaling and DCI.

Optionally, in the embodiment of the present application, the content of the second indication information may be null, where when the content of the second indication information is null, it may indicate that the terminal device is not allowed to perform dynamic enabling transmission precoding.

For example, when the terminal device includes the second indication information in the RRC signaling and the second indication information content is empty, the terminal device may determine that dynamic enabled transmission precoding is not allowed, so that an operation of determining whether to enable transmission precoding in combination with the RRC signaling and DCI is not required to be performed.

When the content of the second indication information in the embodiment of the present application is empty, the terminal device is indicated to be not allowed to perform dynamic enabling transmission precoding, which can be understood that when the content size of the second indication information in the embodiment of the present application is 0bit, the terminal device is indicated to be not allowed to perform dynamic enabling transmission precoding; otherwise, when the content of the second indication information is not empty, the terminal device is indicated to be allowed to perform dynamic enabling transmission precoding, and it can be understood that in the embodiment of the present application, when the content size of the second indication information is greater than 0bit, the terminal device is indicated to be allowed to perform dynamic enabling transmission precoding.

Wherein, based on the content description of the above case 1, when the second indication information indicates that the terminal device is not allowed to perform dynamic enabling transmission precoding, all the first entries included in the RRC signaling may not include the first indication information; or when the second indication information indicates that the terminal equipment is not allowed to dynamically enable transmission precoding, the first indication information in all the first entries contained in the RRC signaling indicates not to enable.

Case 2: when the RRC signaling does not carry the second indication information, the terminal device may determine whether to allow dynamic enabled transmission precoding according to the situation of all the first entries included in the RRC signaling.

Based on the case 2, since the RRC signaling does not include the second indication information, the terminal device needs to determine whether to allow the dynamic enabled transmission precoding in other manners.

Optionally, the terminal device determines that the RRC signaling does not include the first indication information in all the first entries included in the RRC signaling, and the terminal device determines that the dynamic enabled transmission precoding is not allowed; or the terminal equipment determines that the first indication information in all the first items contained in the RRC signaling indicates that the transmission precoding is not enabled, and the terminal equipment determines that the dynamic enabling of the transmission precoding is not allowed.

Conversely, it may be understood that, if the terminal device determines that at least one first entry includes first indication information in all the first entries included in the RRC signaling, the terminal device determines that transmission precoding is allowed to be dynamically enabled; or the terminal equipment determines that the first indication information in at least one first entry indicates the transmission precoding to be enabled in all the first entries contained in the RRC signaling, and the terminal equipment determines that the transmission precoding is allowed to be dynamically enabled.

S202, the network equipment sends DCI to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

Alternatively, the first indication field in the embodiments of the present application may be a time domain resource allocation (time domain resource allocation, TDRA) indication field.

And S203, the terminal equipment receives the DCI signaling.

S204, the terminal equipment determines a second entry according to the first indication field in the DCI.

Optionally, in the embodiment of the present application, the terminal device may select, according to the first indication field in the DCI, a first entry from at least one first entry included in the RRC signaling, that is, determine the second entry.

For example, the terminal device may determine the second entry according to the correspondence between the identification of the first entry and the bit included in the first indication field as shown in table 5 below.

Identification of first item	Bits contained in the first indication field
		First item 1	00
First item 2	01
		First item 3	10
First item 4	11

Table 5 correspondence of the identity of the first entry to the bits contained in the first indication field

Illustratively, it is assumed that the first indication information included in the first entry 1 and the first entry 2 in the above table 5 indicates that transmission precoding is enabled, and the first indication information included in the first entry 3 and the first entry 4 indicates that transmission precoding is not enabled.

For example, when the terminal device selects one first entry from at least one first entry included in the RRC signaling according to the first indication field in the DCI, and if the bit of the first indication field in the DCI is assumed to be 00, it may determine that the second entry is the first entry 1 according to the contents of table 5. Wherein, since the first indication information included in the first entry 1 indicates that the transmission precoding is enabled, the terminal device may enable the transmission precoding when transmitting.

For another example, when the terminal device selects one first entry from at least one first entry included in the RRC signaling according to the first indication field in the DCI, it may determine that the second entry is the first entry 3 according to the contents of table 5 described above, assuming that the bit of the first indication field in the DCI is 10. Wherein, since the first indication information included in the first entry 3 indicates that the transmission precoding is not enabled, the terminal device does not enable the transmission precoding when transmitting.

Further, in the embodiment of the present application, when the terminal device determines the second entry according to the first indication field in the DCI, the terminal device may further determine the second entry in the DCI in combination with the second indication field.

Wherein, the second indication field in the DCI according to the embodiment of the present application includes, but is not limited to, part or all of the following:

An antenna port indication field, precoding information and layer number indication field, a sequence initialization indication field, and a phase tracking reference signal and demodulation reference signal indication field.

Alternatively, the terminal device may determine the second entry according to 2 bits of the first indication field in the DCI and bits of the highest first length in the second indication field.

The following ways of determining the first length are not limited to the following ways:

first length determination mode 1: the first length may be less than or equal to a difference between the second length and the third length.

The second length is a length of a field of a physical downlink control channel PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and when the transmission precoding is not enabled, and the third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and when the transmission precoding is enabled.

Example 1, the first length is a difference between the second length and the third length.

For example, the DMRS sequence in DCI is initialized to a size of the indication field, when the transmission precoding is enabled, that is, the third length is 0bit, and the DMRS sequence in DCI is initialized to a size of the indication field, when the transmission precoding is not enabled, that is, the second length is 1bit, and then the first length is 1bit (1 bit-0 bit=1 bit).

Example 2, the first length may be less than a difference between the second length and the third length.

For example, when the number of ports of the precoding information and layer number indication field is 4, the maximum rank is 2 or 3 or 4, the transmission precoding is not enabled, and the codebook set (codebook subset) is configured to be incoherent (non-coherent), the number of bits of the precoding information and layer number indication field is 4, that is, the second length is 4 bits; when the port number of the precoding information and layer number indication domain is 4, and the precoding enabling is transmitted, and the codebook subset is configured as a non-coherent, the bit number of the precoding information and layer number indication domain is 2, namely the third length is 2 bits.

Wherein, the difference between the second length and the third length is 2 bits, and the first length may be smaller than the difference between the second length and the third length, for example, the value of the first length is 1bit.

First length determination method 2: and determining the first length according to third indication information, wherein the third indication information is used for indicating the size of the first length.

Optionally, in this embodiment of the present application, when the difference between the second length and the third length is greater than 1bit, the specific value of the first length may be indicated by the third indication information. Wherein, the third indication information may be carried in DCI or RRC signaling.

For example, when the number of ports of the precoding information and layer number indication field is 4, the maximum rank is 2 or 3 or 4, and the transmission precoding is not enabled, the codebook subset is configured as a non-peer, the number of bits of the precoding information and layer number indication field is 4, that is, the second length is 4 bits; when the port number of the precoding information and layer number indication domain is 4, and the precoding enabling is transmitted, and the codebook subset is configured as a non-coherent, the bit number of the precoding information and layer number indication domain is 2, namely the third length is 2 bits.

The difference between the second length and the third length is 2 bits and greater than 1bit, and at this time, the network device may instruct the value of the first length of the terminal device through DCI carrying the third indication information or RRC signaling carrying the third indication information.

For example, the first length may be indicated as 2 bits or 1bit by the third indication information.

The terminal device may determine the second entry according to the correspondence between the identifier of the first entry shown in table 6 below and 2 bits in the first indication field and the bit of the highest 1 length in the second indication field.

Table 6 correspondence between the identification of the first entry and the first indication field and the second indication field

Illustratively, it is assumed that the first indication information included in the first entry 1 and the first entry 2 in the above table 6 indicates that transmission precoding is not enabled, and the first indication information included in the first entry 3, the first entry 4, and the first entry 5 indicates that transmission precoding is enabled.

For example, when the terminal device selects one first entry from at least one first entry included in RRC signaling according to the first indication field in the DCI, if it is determined that the second entry is the first entry 1 according to the contents of table 6 above when the bit of the first indication field in the DCI is assumed to be 00, it is determined that transmission precoding is not enabled according to the first entry 1.

For another example, when the terminal device selects one first entry from at least one first entry included in the RRC signaling according to the first indication field in the DCI, and if the bit of the first indication field in the DCI is 11, it may be determined that the second entry may be the first entry 4 or the first entry 5 according to the content of the table 6, and at this time, further determination may be continued in combination with the second indication field in the DCI because it is currently not possible to determine whether the second entry is the first entry 4 or the first entry 5 based on only the first indication field.

If the bits contained in the bits of the maximum 1 length in the second indicator are 0, the second entry may be determined to be the first entry 4 according to the contents of table 2. Wherein, since the first indication information included in the first entry 4 indicates that the transmission precoding is enabled, the terminal device may enable the transmission precoding when transmitting.

If the bits of the highest 1 length in the second indicator are 1, the second entry may be determined to be the first entry 5 according to the contents of the table 6. Wherein, since the first indication information included in the first entry 5 indicates that the transmission precoding is enabled, the terminal device may enable the transmission precoding when transmitting.

It can be understood that, in the embodiment of the present application, although the first entry 4 and the first entry 5 both indicate that the transmission precoding is enabled, the first indication information used to indicate whether the transmission precoding is enabled may be the same in the two first entries, and other contents may be partially or completely different. Thus, specific transmission precoding conditions and time domain resource allocation information need to be indicated jointly in combination with the first indication domain and the second indication domain.

For example, when the first indication field is a TDRA indication field, the first entry may be a PUSCH time domain resource allocation cell, and at this time, information of time domain resource allocation of the first entry 4 and the first entry 5 may be different.

For example, the slot interval of the PUSCH of the first item 4 and the PDCCH scheduling the PUSCH is different from the slot interval of the PUSCH of the first item 5 and the PDCCH scheduling the PUSCH; and/or, the starting symbol of the PUSCH of the first item 4 is different from the starting symbol of the PUSCH of the first item 5; and/or the length of time of the first entry 4 is different from the length of time of the first entry 5.

Thus, in case it is determined that the second entry may be the first entry 4 or the first entry 5 based on the number of bits 11 of the TDRA indication field, in order to further determine whether the second entry adopts the time domain resource allocation information of the first entry 4 or the time domain resource allocation information of the first entry 5, specific time domain resource allocation information may be further determined in combination with the second indication field.

S205, the terminal equipment determines whether to enable transmission precoding according to the second item.

For example, assuming that the second entry is the first entry 1, wherein the indication information in the first entry 1 indicates that transmission precoding is enabled, the terminal device determines that transmission precoding is enabled.

Assuming that the second entry is the first entry 3, wherein the indication information in the first entry 3 indicates that the transmission precoding is not enabled, the terminal device determines that the transmission precoding is not enabled.

It should be noted that, some steps in the description of fig. 2 may be optional, and the sequence of steps does not represent an actual execution sequence, so the application is not limited to executing completely according to the above steps and sequences.

Further, in order to effectively avoid the problem that the field length of the PDCCH carrying the DCI is not uniform caused by whether to enable transmission precoding in the scenario of enabling the terminal device to perform dynamic enabling transmission precoding, the embodiment of the present application may determine the field length of the PDCCH carrying the DCI by the following several modes when the terminal device is enabled to perform dynamic enabling transmission precoding:

Field length determination mode 1: and determining the length of a field of the PDCCH carrying the DCI as a second length.

And the second length is a length of a field of the PDCCH carrying the DCI when the terminal equipment is not allowed to dynamically enable transmission precoding and is not enabled to transmit precoding.

Illustratively, the DMRS sequence initialization indicates the size of the domain, which is 1bit when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is not enabled, i.e. the second length is 1bit.

Therefore, it can be determined that the field length of the PDCCH carrying DCI is 1bit.

Further, based on the field length determining mode 1, when the RRC signaling indicates that the transmission precoding is enabled, the length of the field of the PDCCH carrying the DCI may be adjusted by means of high order zero padding.

Optionally, when the RRC signaling indicates that transmission precoding is enabled, the length of the field of the PDCCH carrying the DCI may be zero padded to a second length from a high order; alternatively, when RRC signaling enables transmission precoding, the bit position of the highest first length of the field of the PDCCH carrying the DCI may be zero.

The size of the first length may be described with reference to the above description about the first length determining manner, which is not described herein for brevity.

For example, when the RRC signaling indicates that transmission precoding is enabled, the length of the precoding information and the layer number indication field in the DCI may be adjusted by means of high order zero padding. When the number of ports is 4, the maximum rank is 2 or 3 or 4, and the codebook subset is configured as a non-encoding, the number of bits of the precoding information and the number of layers in the DCI indicated domain is 4 bits when the precoding is not enabled, and the number of bits of the precoding information and the number of layers indicated domain is 2 bits when the precoding is enabled.

For example, when the length of the precoding information and the layer number indication field in the DCI is adjusted by the high-order zero padding, the size of the precoding information and the layer number indication field in the DCI may be padded to a second length, that is, padded to 4 bits, by the high-order zero padding when the precoding is enabled.

For another example, when the length of the precoding information and the layer number indication field in the DCI is adjusted by the high-order zero padding method, if the difference between the first length and the second length is smaller than the difference between the second length and the third length, and the first length is 1bit, the bit position of the highest 1bit length of the precoding information and the layer number indication field in the DCI may be zero.

For another example, when the length of the precoding information and the layer number indication field in the DCI is adjusted by the high-order zero padding method, if the difference between the first length and the second length is 2 bits, the bit position of the highest 2bit length of the precoding information and the layer number indication field in the DCI may be zero.

It can be appreciated that when the terminal device is not allowed to perform the dynamic enabled transmission precoding, the length of the field of the PDCCH carrying the DCI is the second length or the third length, so that there is no case that the length of the field of the PDCCH carrying the DCI is uncertain, and high-order zero padding is not required for the field of the PDCCH carrying the DCI.

Field length determination mode 2: and determining the length of a field of the PDCCH carrying the DCI as the largest length of the third length and the second length.

The third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and enable transmission precoding; the second length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when the transmission precoding is not enabled.

For example, the size of the antenna port indication field in the DCI occupies 2 bits when the DMRS-Type is 1, the maximum length of the DMRS is 1, and the transmission precoding is enabled, i.e., the third length is 2 bits; the antenna port in the DCI indicates the size of the domain, and occupies 3 bits when DMRS-Type is 1, DMRS maximum length is 1, and transmission precoding is not enabled, i.e., the second length is 3 bits.

The maximum length of the second length and the third length is the second length, that is, the 3bit is the maximum value, and the field length of the PDCCH carrying the DCI may be determined to be 3bit.

Further, based on the field length determining mode 2, when the RRC signaling indicates that the transmission precoding is enabled, the length of the field of the PDCCH carrying the DCI may be padded to the largest length of the third length and the second length by means of high order zero padding.

For example, the size of the antenna port indication field in DCI occupies 2 bits when DMRS-Type is 1, DMRS maximum length is 1 and transmission precoding is enabled, and occupies 3 bits when DMRS-Type is 1, DMRS maximum length is 1 and transmission precoding is not enabled. At this time, the size of the antenna port indication field in the DCI may be padded to the largest length of the third length and the second length, that is, to 3 bits, by means of high-order zero padding when the precoding is enabled.

Further, in order to better introduce the communication method provided by the application, based on the content shown in fig. 2, the method is further described in detail in combination with various application scenarios.

And determining a second item by the terminal equipment according to the first indication field in the DCI, wherein the second item is one of at least one first item contained in the RRC signaling.

For example, as shown in fig. 3, it is assumed that, of at least one first entry included in the RRC signaling, a first entry 1 and a first entry 2 indicate that transmission precoding is not enabled, and a bit of a first indication field corresponding to the first entry 1 is 00, and a bit of a first indication field corresponding to the first entry 2 is 01.

If the network device wants to instruct the terminal device not to enable the precoding transmission, the first entry may be selected from the first entries 1 and 2 as the second entry, i.e. the bit of the first indication field in the DCI may be set to 00 or 01.

For example, when the network device sets the bit of the first indication field in the DCI to 00, after the terminal device receives the RRC signaling and the DCI, it may determine that the second entry is a first entry 1 in at least one first entry included in the RRC signaling according to the number of bits 00 of the first indication field in the received DCI, and determine that transmission precoding is not enabled according to the first entry 1.

As another example, as shown in fig. 3, it is assumed that a first entry 3 and a first entry 4 of at least one first entry included in the RRC signaling indicate transmission-enabled precoding, and a bit of a first indication field corresponding to the first entry 3 is 10 and a bit of a first indication field corresponding to the first entry 4 is 11.

If the network device wants to instruct the terminal device to enable transmission precoding, the first entry may be selected from the first entry 3 and the first entry 4 as the second entry, i.e. the bit of the first indication field in the DCI may be set to 10 or 11.

For example, when the network device sets the bit of the first indication field in the DCI to 10, after the terminal device receives the RRC signaling and the DCI, the network device may determine that the second entry is a first entry 3 in at least one first entry included in the RRC signaling according to the number of bits 10 of the first indication field in the received DCI, and determine that transmission precoding is enabled according to the first entry 3.

And determining a second entry by the terminal equipment according to the first indication domain and a second indication domain in the DCI.

Alternatively, when the first indication field in the DCI is the TDRA indication field and the number of optional first entries for RRC signaling is a, the number of bits of the TDRA indication field in the DCI may be smaller than

Where a represents the number of first entries optional for RRC signaling.

For example, assuming that the number of optional first entries (e.g., pusch-timedomainalllocation list) for RRC signaling is a, the number of bits of the TDRA indication field in the DCI may be smaller than

For example, assuming that the first entry list in the embodiment of the present application includes 5 optional first entries, for example, the first entry may include 4 columns of parameters, the value a in the embodiment of the present application is 5, and the bit number of the TDRA indication field in the dci may be 2 bits, that is, less than

At this time, the terminal device may determine the second entry according to the TDRA indication field and the second indication field, thereby determining whether the RRC signaling indicates transmission precoding is enabled or not enabled according to the second entry.

For example, as shown in fig. 4, assume that the first indication domain is a TDRA indication domain, and assume that a first entry 1 and a first entry 2 of at least one first entry included in the RRC signaling indicate that transmission precoding is not enabled, and that a bit of the TDRA indication domain corresponding to the first entry 1 is 00 and a bit of the TDRA indication domain corresponding to the first entry 2 is 01; and a first entry 3, a first entry 4 and a first entry 5 of at least one first entry included in the RRC signaling indicate that transmission precoding is enabled, and a bit of a TDRA indication field corresponding to the first entry 3 is 01, a bit of a TDRA indication field corresponding to the first entry 4 is 11 and a bit of a corresponding second indication field is 0, and a bit of a TDRA indication field corresponding to the first entry 5 is 11 and a bit of a corresponding second indication field is 1.

For example, after receiving the RRC signaling and the DCI, the terminal device may determine that the second entry is a first entry 1 of at least one first entry included in the RRC signaling according to a bit of a TDRA indication field in the received DCI being 00, and determine that transmission precoding is not enabled according to the first entry 1.

For another example, after the terminal device receives the RRC signaling and the DCI, the TDRA indication field in the DCI has a bit of 11, and when the TDRA indication field has a bit of 11, the terminal device corresponds to the first entry 4 and the first entry 5, so that the terminal device cannot determine, according to the TDRA indication field in the received DCI, whether the second entry is specifically the first entry 4 or the first entry 5 included in the RRC signaling.

At this time, the terminal device may further determine the second entry by combining a second indication field in the DCI, such as precoding information and a bit value of up to 1 length in the layer number indication field.

When the precoding information in the DCI and the bit value of the highest 1 length in the layer number indication field are 0, it may be determined that the second entry is a first entry 4 included in the RRC signaling, and transmission precoding is enabled according to the first entry 4; when the precoding information in the DCI and the bit value of the highest 1 length in the layer number indication field are 1, the second entry may be determined to be the first entry 5 included in the RRC signaling, and the transmission precoding is determined to be enabled according to the first entry 5.

In addition, a scheme of deforming based on the communication method described in fig. 2 is also included in the scope of protection of the present application, for example, deforming based on the content described in fig. 2 to obtain a communication method described in fig. 5, which specifically includes the following steps:

s500, the network equipment sends RRC signaling to the terminal equipment, wherein the RRC signaling comprises at least one first entry, and the identification of the first entry is used for indicating whether transmission precoding is enabled or not.

The identifier of the first entry in the embodiment of the present application may be a sequence number of the first entry in the first entry list, a name of the first entry, etc., which are not limited herein.

Wherein, if the RRC signaling further includes second indication information, it may be understood that if the second indication information included in the RRC signaling indicates that the terminal device is allowed to perform dynamic enabling transmission precoding, the terminal device may determine whether to enable transmission precoding according to the selected identifier of the first entry; if the second indication information included in the RRC signaling indicates that the terminal device is not allowed to perform dynamic enabling transmission precoding, the terminal device does not need to determine whether to enable transmission precoding according to the selected identifier of the first entry.

Further, in the embodiment of the present application, the network device may adjust, according to the actual situation, the proportion or the number of the first entries indicating that the precoding is enabled to be transmitted in the optional first entries included in the RRC signaling, and the specific content may refer to the content of fig. 2, which is not described herein for brevity.

S501, the terminal equipment receives the RRC signaling.

S502, the network device sends DCI signaling to the terminal device, where a first indication field in the DCI is used to determine an identifier of the selected first entry.

S503, the terminal equipment receives the DCI signaling.

S504, the terminal equipment determines the identification of the selected first item according to the first indication field in the DCI.

S505, the terminal equipment determines whether the selected first item enables transmission precoding according to the corresponding relation between the identification of the first item and whether the transmission precoding is enabled.

In one case, the correspondence between the identification of the first entry and whether to enable transmission precoding in the embodiment of the present application may be preset and stored in the terminal device.

In another case, the corresponding relationship between the codebook identification and whether to enable transmission precoding may be preset and stored in a third party memory accessible to the terminal device.

Illustratively, the correspondence between the identification of the first entry and whether to enable transmission precoding in the embodiment of the present application is shown in table 7 below.

Identification of first item	Whether or not to enable
		First item 1	Is that
First item 2	Whether or not
		First item 3	Whether or not
First item 4	Is that

Table 7 identification of first entry and correspondence of whether transmission precoding is enabled

For example, when selecting one first entry from at least one first entry included in RRC signaling according to the first indication field in DCI, the terminal device may determine that the selected first entry is the first entry 1 according to the content of table 5 above, assuming that the bit of the first indication field in DCI is 00. The terminal device may determine, according to the correspondence between the identifier of the first entry in the table 7 and whether to enable transmission precoding, that the transmission precoding is enabled when the identifier of the first entry is the first entry 1, and then the terminal device may enable the transmission precoding when transmitting.

The method and the device are based on the same or similar technical conception, and because the principles of solving the problems by the method and the device are similar, the implementation of the device and the method can be referred to each other, and the repetition is not repeated.

In addition, the terms "system" and "network" in embodiments of the present application may be used interchangeably. The terms "field" and "indication field" in embodiments of the present application may be used interchangeably, e.g., the TDRA field may also be referred to as a TDRA indication field. "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. At least one term (a) or the like, as used herein, refers to any combination of such terms, including any combination of single term (a) or plural terms (a). For example, at least one (one) of a, b, or c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural. In the case of … …, the method can also be described as "if … …" or "if" or "when … …", and the like.

Unless stated to the contrary, references to "first," "second," etc. ordinal words of the embodiments are used to distinguish between the plurality of objects, and are not used to define a sequence, timing, priority, or importance of the plurality of objects. Furthermore, the terms "comprising" and "having" in the embodiments and claims of the present application and in the drawings are not exclusive. For example, a process, method, system, article, or apparatus that comprises a list of steps or modules is not limited to only those steps or modules but may include other steps or modules not listed.

From the foregoing description of the embodiments of the present application, it may be appreciated that, in order to achieve the foregoing functions, each device includes a hardware structure and/or a software module that performs each function. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.

Based on the above embodiments, fig. 6 is a schematic block diagram of an apparatus 600 provided in an embodiment of the present application, for implementing the functions of a terminal device or a network device in the above method embodiments. For example, the apparatus may be a software module or a system on a chip. The chip may be formed from a chip or may include a chip and other discrete devices. The apparatus 600 comprises a processing unit 601 and a communication unit 602. The communication unit 602 is configured to communicate with other devices, and may also be referred to as a communication interface, a transceiver unit, or an input/output interface.

In some embodiments, the apparatus 600 may be a terminal device, or a chip or a circuit configured in the terminal device, or the like. The processing unit 601 may be configured to perform processing related operations of the terminal device in the above method embodiment, and the communication unit 602 is configured to instruct transceiver related operations of the terminal device in the above method embodiment.

For example, the communication unit 602 is configured to receive radio resource control RRC signaling from a network device, where the RRC signaling includes at least one first entry, and the first entry includes indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; a processing unit 601, configured to determine a second entry according to a first indication field in the DCI, where the second entry is one of the first entries; determining whether transmission precoding is enabled according to the second entry; or alternatively, the process may be performed,

a communication unit 602, configured to receive radio resource control RRC signaling from a network device, where the RRC signaling includes at least one first entry, and an identifier of the first entry is used to indicate whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; a processing unit 601, configured to determine, according to a first indication field in the DCI, an identifier of a selected first entry; and determining whether the selected first item enables transmission precoding according to the identification of the first item and the corresponding relation of whether the transmission precoding is enabled.

Alternatively, the first entry further includes information indicating a domain in time frequency.

Alternatively, the processing unit 601 is configured to:

determining the second entry according to the first indication field and a second indication field in the DCI;

wherein the first indication field comprises a time domain resource allocation, TDRA, indication field; the second indication field includes an antenna port indication field, precoding information and layer number indication field, a sequence initialization indication field, and one or more of a phase tracking reference signal and a demodulation reference signal indication field.

Alternatively, the processing unit 601 is configured to:

determining the second entry according to the first indication field and the highest first length bit in the second indication field;

wherein the first length is the difference between the second length and the third length; the second length is a length of a field of a physical downlink control channel PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and is not enabled to perform transmission precoding; the third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is enabled.

Alternatively, the processing unit 601 is configured to:

the first length is determined according to third indication information carried in the RRC signaling or DCI, where the third indication information is used to indicate a size of the first length.

Optionally, the RRC signaling further includes second indication information, where the second indication information is used to indicate whether to allow the terminal device to perform dynamic enabled transmission precoding.

Alternatively, when the terminal device is allowed to perform dynamic enabling transmission precoding, the length of a field of a physical downlink control channel PDCCH carrying the DCI is equal to the second length; or when the terminal equipment is allowed to dynamically enable transmission precoding, the length of a field of the PDCCH carrying the DCI is the largest length of a third length and the second length; the second length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and is not enabled to perform transmission precoding; the third length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to dynamically enable transmission precoding and when transmission precoding is enabled.

Optionally, when there is indication information that enables precoding transmission in the at least one first entry, a bit of a highest first length of the PDCCH field is zero; or alternatively, the first and second heat exchangers may be,

the second indication information indicates that when the terminal equipment is allowed to dynamically enable transmission precoding, the bit of the highest first length of the PDCCH field is zero.

In other embodiments, the apparatus 600 may be a network device, or a chip or a circuit configured in the network device. The processing unit 601 may be configured to perform processing related operations of the network device in the above method embodiment, and the communication unit 602 may be configured to perform transceiving related operations of the network device in the above method embodiment.

For example, the communication unit 602 is configured to send radio resource control RRC signaling to the terminal device, where the RRC signaling includes at least one first entry, and the first entry includes indication information for indicating whether transmission precoding is enabled; and sending Downlink Control Information (DCI) to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

Alternatively, a second indication field in the DCI is used to determine the second entry in association with the first indication field;

Optionally, when the indication information capable of transmitting precoding exists in the at least one first entry, setting a bit of a highest first length of a field of a physical downlink control channel PDCCH carrying the DCI to zero; or alternatively, the first and second heat exchangers may be,

and when the second indication information indicates that the terminal equipment is allowed to perform dynamic enabled transmission precoding, setting the bit of the highest first length of the field of the PDCCH carrying the DCI to be zero.

Optionally, the RRC signaling further includes third indication information, where the third indication information is used to indicate the size of the first length.

Alternatively, the processing unit 601 is further configured to:

when the terminal equipment meets a first condition, setting the proportion of enabling transmission precoding to be larger than the proportion of not enabling transmission precoding;

the first condition includes that the number of link failures of the terminal equipment exceeds a threshold number, and the residual power reported by the terminal equipment is smaller than one or more of the threshold powers.

The division of the units in the embodiment of the application is schematic, which is merely a logic function division, and other division manners may be adopted in actual implementation. In addition, in the embodiment of the present application, each functional unit may be integrated in one processor, or may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.

Referring to fig. 7, fig. 7 is a schematic diagram of an apparatus 700 provided in an embodiment of the present application, where the apparatus 700 may be an electronic device or a component in an electronic device, such as a chip or an integrated circuit. The apparatus 700 may include at least one processor 702 and a communication interface 704. Further optionally, the apparatus may further comprise at least one memory 701. Still further, optionally, a bus 703 may be included. Wherein the memory 701, the processor 702 and the communication interface 704 are connected by a bus 703.

The memory 701 is used to provide a storage space, and data such as an operating system and a computer program may be stored in the storage space. The memory 701 mentioned in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous DRAM (SLDRAM), and direct memory bus RAM (DR RAM).

It should be noted that the memory described herein is intended to comprise, without being limited to, these and any other suitable types of memory. The processor 702 is a module for performing arithmetic operations and/or logic operations, and may specifically be one or more of a central processing unit (central processing unit, CPU), a picture processor (graphics processing unit, GPU), a microprocessor (microprocessor unit, MPU), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA), a complex programmable logic device (complex programmable logic device, CPLD), a coprocessor (assisting the central processing unit in performing corresponding processing and application), a micro control unit (microcontroller unit, MCU), and other processing modules.

It should be noted that when the processor is a general purpose processor, an ASIC, an FPGA or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, the memory (storage module) may be integrated in the processor.

The communication interface 704 may be used to provide information input or output to the at least one processor. And/or the communication interface may be used to receive externally transmitted data and/or transmit externally, and may be a wired link interface including, for example, an ethernet cable, or may be a wireless link (Wi-Fi, bluetooth, universal wireless transmission, vehicle-mounted short-range communication technology, etc.) interface. Optionally, the communication interface 704 may also include a transmitter (e.g., radio frequency transmitter, antenna, etc.) or a receiver, etc. coupled to the interface.

In some embodiments, the apparatus 700 may be a terminal device or a component in a terminal device, such as a chip or an integrated circuit, in the above method embodiments. The processor 702 in the apparatus 700 is configured to read the computer program stored in the memory 701, and control the terminal device to perform the following operations:

receiving Radio Resource Control (RRC) signaling from a network device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment; determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries; determining whether transmission precoding is enabled according to the second entry; or alternatively, the process may be performed,

Optionally, the processor 702 in the terminal device may be further configured to read the program in the memory 701 and execute the method flows executed by the terminal device in S200 to S205 shown in fig. 2; or performs the flow of the method performed by the terminal device in S500 to S505 as shown in fig. 5.

For specific details, reference may be made to the descriptions in the above method embodiments, and no further description is given here.

In other embodiments, the apparatus 700 may be a network device or a component in a network device, such as a chip or an integrated circuit, in the above method embodiments. The processor 702 in the apparatus 700 is configured to read the computer program stored in the memory 701, and control the network device to perform the following operations:

Optionally, the processor 702 in the network device may be further configured to read the program in the memory 701 and execute the method flows executed by the network device in S200 to S205 shown in fig. 2; or performs the flow of the method performed by the terminal device in S500 to S505 as shown in fig. 5.

Based on the same concept, the embodiment of the present invention provides a terminal device, which may be the scheduling terminal device and/or the transmitting terminal device, as shown in fig. 8, a terminal 800 includes: radio Frequency (RF) circuit 810, power supply 820, processor 830, memory 840, input unit 850, display unit 860, camera 870, communication interface 880, and wireless fidelity (Wireless Fidelity, wiFi) module 890. It will be appreciated by those skilled in the art that the structure of the terminal shown in fig. 8 is not limiting of the terminal, and that the terminal provided by the embodiments of the present application may include more or less components than those illustrated, or may combine some components, or may be arranged with different components.

The following describes the components of the terminal 800 in detail with reference to fig. 8:

the RF circuitry 810 may be used for receiving and transmitting data during a communication or session. In particular, the RF circuit 810 receives downlink data from a base station and then sends the downlink data to the processor 830 for processing; in addition, uplink data to be transmitted is transmitted to the base station. Typically, the RF circuitry 810 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (Low Noise Amplifier, LNA), a duplexer, and the like.

In addition, the RF circuitry 810 may also communicate with networks and other terminals via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, global system for mobile communications (Global System of Mobile communication, GSM), general packet radio service (General Packet Radio Service, GPRS), code division multiple access (Code Division Multiple Access, CDMA), wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA), long term evolution (Long Term Evolution, LTE), email, short message service (Short Messaging Service, SMS), and the like.

The WiFi technology belongs to a short-distance wireless transmission technology, and the terminal 800 may be connected to an Access Point (AP) through a WiFi module 890, so as to achieve Access to a data network. The WiFi module 890 may be used for receiving and transmitting data during communication.

The terminal 800 may be physically connected to other terminals through the communication interface 880. Optionally, the communication interface 880 is connected to the communication interfaces of the other terminals through a cable, so as to implement data transmission between the terminal 800 and the other terminals.

The terminal 800 is capable of implementing a communication service and transmitting information messages to other contacts, so that the terminal 800 needs to have a data transmission function, that is, the terminal 800 needs to include a communication module therein. Although fig. 8 shows communication modules such as the RF circuit 810, the WiFi module 890, and the communication interface 880, it is understood that at least one of the above components or other communication modules (e.g., bluetooth modules) for implementing communication exist in the terminal 800 for data transmission.

The memory 840 may be used to store software programs and modules. The processor 830 performs various functional applications and data processing of the terminal 800 by running software programs and modules stored in the memory 840, and when the processor 830 executes program codes in the memory 840, some or all of the processes in the embodiments of the present invention can be implemented.

Alternatively, the memory 840 may mainly include a storage program area and a storage data area. The storage program area can store an operating system, various application programs (such as communication application), a face recognition module and the like; the storage data area may store data created according to the use of the terminal (such as multimedia files such as various pictures, video files, and the like, and a face message template), etc.

In addition, the memory 840 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The input unit 850 may be used to receive a numeric or character message input by a user and to generate key signal inputs related to user settings and function controls of the terminal 800.

Alternatively, the input unit 850 may include a touch panel 851 and other input terminals 852.

The processor 830 is a control center of the terminal 800, connects various components using various interfaces and lines, and performs various functions of the terminal 800 and processes data by running or executing software programs and/or modules stored in the memory 840 and calling data stored in the memory 840, thereby implementing various services based on the terminal.

Optionally, the processor 830 may include one or more processing units. Alternatively, the processor 730 may integrate an application processor that primarily handles operating systems, user interfaces, applications, etc., with a modem processor that primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 830.

The camera 870 is configured to implement a shooting function of the terminal 800, and shoot pictures or videos.

The terminal 800 also includes a power source 820 (e.g., a battery) for powering the various components.

Although not shown, the terminal 800 may further include at least one sensor, audio circuit, etc., which will not be described herein.

In which the memory 840 may store the same program code as the storage unit 801, which when executed by the processor 830 causes the processor 830 to implement all the functions of the processing unit 800.

Embodiments also provide a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method described in the above embodiments.

Embodiments of the present application also provide a chip system including at least one processor and interface circuitry. Further optionally, the chip system may further include a memory or an external memory. The processor is configured to perform interaction of instructions and/or data through the interface circuit to implement the method of the above method embodiments. The chip system may be formed of a chip or may include a chip and other discrete devices. In some possible implementations, aspects of the communication method provided by the embodiments of the present invention may also be implemented in the form of a program product including program code for causing a computer device to carry out the steps of the communication method according to the various exemplary embodiments of the present invention as described in this specification, when the program code is run on the computer device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More examples (a non-exhaustive list) of one implementation of the embodiments of the present application of a readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, random Access Memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

A program product for communication according to an embodiment of the present invention may employ a portable compact disc read-only memory (CD-ROM) and comprise program code and may run on a server device. However, the program product of the present invention is not limited thereto, and in this document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with a message transmission, apparatus, or device.

The readable signal medium may include a data signal propagated in baseband or as part of a carrier wave with readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. The readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with a periodic network action system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server. In the case of remote computing devices, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device.

The embodiment of the application also provides a computer readable storage medium for the communication method, namely the content is not lost after power is off. The storage medium has stored therein a software program comprising program code which, when executed on a computing device, implements any of the above communication schemes of the embodiments of the present application when read and executed by one or more processors.

The present application is described above with reference to block diagrams and/or flowchart illustrations of methods, apparatus (systems) and/or computer program products according to embodiments of the application. It will be understood that one block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, and/or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer and/or other programmable data processing apparatus, create means for implementing the functions/acts specified in the block diagrams and/or flowchart block or blocks.

Accordingly, the present application may also be embodied in hardware and/or in software (including firmware, resident software, micro-code, etc.). Still further, the present application may take the form of a computer program product on a computer-usable or computer-readable storage medium having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of this application, a computer-usable or computer-readable medium may be any medium that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

Although the present application has been described in connection with specific features and embodiments thereof, it will be apparent that various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are merely exemplary illustrations of the present application as defined in the appended claims and are considered to cover any and all modifications, variations, combinations, or equivalents that fall within the scope of the present application. It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to include such modifications and variations as well.

Claims

1. A method of communication, the method comprising:

receiving Radio Resource Control (RRC) signaling from a network device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises first indication information for indicating whether transmission precoding is enabled;

receiving downlink control information DCI from the network equipment;

determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries;

And determining whether transmission precoding is enabled or not according to the second entry.

2. The method of claim 1, wherein the first indication field comprises a time domain resource allocation, TDRA, indication field.

3. The method of claim 1 or 2, wherein the determining a second entry from a first indication field in the DCI comprises:

the second indication domain comprises an antenna port indication domain, a precoding information and layer number indication domain, a sequence initialization indication domain and one or more of a phase tracking reference signal and a demodulation reference signal indication domain.

4. The method of claim 3, wherein the determining the second entry from the first indication field and a second indication field in the DCI comprises:

5. The method of claim 3, wherein the determining the second entry from the first indication field and a second indication field in the DCI comprises:

6. The method according to any one of claims 1 to 5, wherein the RRC signaling further includes second indication information, where the second indication information is used to indicate whether the terminal device is allowed to perform dynamic enabled transmission precoding.

7. The method of any of claims 1-6, wherein a length of a field of a physical downlink control channel, PDCCH, carrying the DCI is equal to a second length when dynamic enabling of transmission precoding by a terminal device is allowed; or when the terminal equipment is allowed to dynamically enable transmission precoding, the length of a field of the PDCCH carrying the DCI is the largest length of a third length and the second length;

The second length is a length of a field of the PDCCH carrying the DCI when the terminal device is not allowed to perform dynamic enabling transmission precoding and is not enabled to perform transmission precoding; and the third length is the length of a field of the PDCCH carrying the DCI when the terminal equipment is not allowed to carry out dynamic enabling transmission precoding and the enabling transmission precoding.

8. The method of claim 7, wherein a bit of a highest first length of the PDCCH field is zero when there is indication information in the at least one first entry that enables transmission of precoding; or (b)

9. A method of communication, the method comprising:

transmitting Radio Resource Control (RRC) signaling to a terminal device, wherein the RRC signaling comprises at least one first entry, and the first entry comprises first indication information for indicating whether transmission precoding is enabled or not;

and sending Downlink Control Information (DCI) to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

10. The method of claim 9, wherein the first indication field comprises a time domain resource allocation, TDRA, indication field.

11. The method of claim 9 or 10, wherein a second indication field in the DCI is used to determine the second entry in conjunction with the first indication field;

12. The method according to any of claims 9-11, wherein the RRC signaling further comprises second indication information, where the second indication information is used to indicate whether the terminal device is allowed to dynamically enable transmission precoding.

13. The method of claim 12, wherein when there is indication information in the at least one first entry that enables transmission precoding, setting a bit of a highest first length of a field of a physical downlink control channel, PDCCH, carrying the DCI to zero; or (b)

14. The method of claim 13, wherein the RRC signaling or the DCI further comprises third indication information, the third indication information being used to indicate a size of the first length.

15. The method of any one of claims 9 to 14, wherein the method further comprises:

16. A communication device, comprising:

a transceiver module, configured to receive radio resource control RRC signaling from a network device, where the RRC signaling includes at least one first entry, and the first entry includes first indication information for indicating whether transmission precoding is enabled; receiving downlink control information DCI from the network equipment;

the processing module is used for: determining a second entry according to a first indication field in the DCI, wherein the second entry is one of the first entries; and determining whether transmission precoding is enabled or not according to the second entry.

17. A communication device, comprising:

a transceiver module, configured to send radio resource control RRC signaling to a terminal device, where the RRC signaling includes at least one first entry, and the first entry includes first indication information for indicating whether transmission precoding is enabled; and sending Downlink Control Information (DCI) to the terminal equipment, wherein a first indication field in the DCI is used for determining a second item, and the second item is one item in the first items.

18. A communication device, comprising:

one or more processors;

a memory for storing one or more programs;

the method of any one of claims 1-8 is implemented when the one or more programs are executed by the one or more processors.

19. A communication device, comprising:

one or more processors;

a memory for storing one or more programs;

the method of any of claims 9-15 is implemented when the one or more programs are executed by the one or more processors.

20. A communication chip, comprising: a processor and a communication interface, said processor for invoking and executing instructions from said communication interface, said instructions when executed by said processor,

Implementing the method of any one of claims 1-8; or to carry out the method of any one of claims 9 to 15.

21. A computer readable storage medium, characterized in that a computer program is stored thereon, which computer program, when executed, implements the method according to any of claims 1-8; or to carry out the method of any one of claims 9 to 15.