CN111865482A

CN111865482A - Communication method and device

Info

Publication number: CN111865482A
Application number: CN201910364890.7A
Authority: CN
Inventors: 袁璞; 苏宏家; 王源泉; 张兴炜; 张锦芳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-10-30
Also published as: WO2020221261A1

Abstract

A communication method and device are provided, wherein the method comprises the following steps: the first terminal equipment receives a sidelink channel state information reference signal from the second terminal equipment, the first terminal equipment determines channel state information according to the sidelink channel state information reference signal, the first terminal equipment sends the channel state information to the second terminal equipment, the channel state information is carried on a first sidelink data channel, and the bandwidth of the first sidelink data channel is smaller than the minimum subchannel bandwidth. By adopting the method, the bandwidth of the first side-link data channel carrying the channel state information is smaller, so that the system resource can be effectively saved. The embodiment of the application is suitable for the fields of car networking, intelligent networking cars or automatic driving.

Description

Communication method and device

Technical Field

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

Background

In a vehicle to all (V2X) system, direct communication between end devices may be performed through a PC5 interface, and the communication link used is called a sidelink. On the sidelink, Channel State Information (CSI) feedback typically uses a physical side-link shared channel (psch).

In the prior art, the frequency domain minimum granularity of the psch channel resource is one subchannel bandwidth, which is generally 4 RB. The data size of the CSI information is generally small, and may be only a few or several tens of bits. It is assumed that the CSI information is transmitted using a psch occupying 8 symbols, which occupies 4 × 12 × 8 ═ 384 Resource Elements (REs). It can be seen that, when CSI information is sent on the existing psch, more resources are wasted.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which are used for solving the problem of great resource waste when channel state information is fed back on a side link.

In a first aspect, an embodiment of the present application provides a communication method, which is applicable to a first terminal device, and the method includes: the first terminal equipment receives a sidelink channel state information reference signal from the second terminal equipment, the first terminal equipment determines channel state information according to the sidelink channel state information reference signal, the first terminal equipment sends the channel state information to the second terminal equipment, the channel state information is carried on a first sidelink data channel, and the bandwidth of the first sidelink data channel is smaller than the minimum subchannel bandwidth.

By adopting the technical scheme provided by the embodiment of the application, the first terminal equipment can send the channel state information to the second terminal equipment on the first side-link data channel with the bandwidth smaller than the minimum sub-channel bandwidth, so that less resources can be occupied, and the purpose of saving system resources is achieved.

In one possible design, the first terminal device may further send, to the second terminal device, first control information, where the first control information is carried on a first sidelink control channel corresponding to the first sidelink data channel, and the first control information is used to indicate channel state information. In this way, the first terminal device may send the first control information on the control channel corresponding to the first sidelink data channel carrying the channel state information while sending the channel state information to the second terminal device, so that the second terminal device receives the channel state information according to the first control information.

In one possible design, the first control information may include a modulation and coding scheme, MCS, used by the channel state information. In this way, the second terminal device can correctly decode the channel state information according to the MCS indicated in the first control information.

In one possible design, the sum of the number of time domain symbols occupied by the first sidelink data channel and the corresponding first sidelink control channel is 12, where the number of time domain symbols occupied by the first sidelink data channel is greater than or equal to 3 and less than or equal to 9. In this way, when there is a first sidelink control channel corresponding to the first sidelink data channel, the first sidelink data channel and the first sidelink control channel both occupy at least 3 time domain symbols, so as to be able to carry channel state information and first control information.

In one possible design, the first sidelink data channel occupies a number of time domain symbols of 12. In this way, in one timeslot, there may be no first sidelink control channel corresponding to the first sidelink data channel, and the first terminal device may directly send the channel state information to the second terminal device, and the second terminal device performs blind detection on the channel state information on the first sidelink data.

In one possible design, the first terminal device may also receive the sidestream channel state information configuration information from the second terminal device, e.g., the first terminal device may receive the sidestream channel state information configuration information before receiving the sidestream channel state information reference signal from the second terminal device; thus, the determining, by the first terminal device, the channel state information according to the sidelink channel state information reference signal may include: and the first terminal equipment measures the lateral channel state information reference signal according to the received lateral channel state information configuration information to obtain the channel state information.

In one possible design, the sidelink channel status information configuration information may include: measuring time domain granularity and/or frequency domain granularity of a sidelink channel state information reference signal and parameters included by channel state information; the channel state information may comprise one or more of a channel quality indication CQI, an order indication RI, a precoding matrix indication PMI, a reference signal received power RSRP. Therefore, the second terminal equipment can specifically set the mode of obtaining the channel state information by measuring the first terminal equipment, so that the applicability of the communication method is effectively improved.

In one possible design, the sidelink channel status information configuration information may include: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information; as such, the sending of the channel state information by the first terminal device to the second terminal device may include: and the first terminal equipment sends the channel state information to the second terminal equipment according to the sidestream channel state information configuration information. In this way, the second terminal device can also specifically set the mode of sending the channel state information to the first terminal device, thereby effectively improving the applicability of the communication method.

In a second aspect, an embodiment of the present application provides another communication method, which is applicable to a second terminal device, and the method includes: the second terminal device sends a side-line channel state information reference signal to the first terminal device, the second terminal device receives channel state information from the first terminal device, the channel state information is determined by the first terminal device according to the side-line channel state information reference signal, the channel state information is carried on a first side-line data channel, and the bandwidth of the first side-line data channel is smaller than the minimum sub-channel bandwidth.

By adopting the technical scheme provided by the embodiment of the application, the second terminal equipment can receive the channel state information sent by the first terminal equipment on the first side-link data channel with the bandwidth smaller than the minimum sub-channel bandwidth, so that less resources can be occupied, and the purpose of saving system resources is achieved.

In one possible design, the second terminal device may receive first control information from the first terminal device, the first control information being carried on a first sidelink control channel corresponding to the first sidelink data channel, the first control information being indicative of channel state information. Therefore, the second terminal device can receive the channel state information sent by the first terminal device, the first terminal device sends the first control information on the control channel corresponding to the first sidelink data channel bearing the channel state information, and receives the channel state information according to the first control information, so that the complexity of the second terminal device for detecting the channel state information is reduced.

In one possible design, the first control information may include a modulation and coding scheme, MCS, used by the channel state information, such that the second terminal device may correctly decode the channel state information according to the MCS.

In one possible design, the first sidelink data channel occupies a number of time domain symbols of 12. In this way, in one timeslot, there may be no first sidelink control channel corresponding to the first sidelink data channel, and the second terminal device performs blind detection on the channel state information on the first sidelink data, so that resource overhead for transmitting the channel state information can be reduced.

In a possible design, the second terminal device may further send, to the first terminal device, sidelink channel status information configuration information, where the sidelink channel status information configuration information is used to instruct the first terminal device to measure the sidelink channel status information reference signal, so as to obtain the channel status information.

In one possible design, the sidelink channel status information configuration information may include: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information; as such, the second terminal device receiving the channel state information from the first terminal device may include: and the second terminal equipment receives the channel state information sent by the first terminal equipment according to the sideline channel state information configuration information. In this way, the second terminal device can also specifically set the mode of sending the channel state information to the first terminal device, thereby effectively improving the applicability of the communication method.

In a third aspect, an embodiment of the present application provides a communication apparatus having a function of implementing a first terminal device in any one of the possible designs of the first aspect or the first aspect, or having a function of implementing a second terminal device in any one of the possible designs of the second aspect or the second aspect. The communication device may be a terminal device, such as a handheld terminal device, a vehicle-mounted terminal device, or the like, or may be a device included in a terminal device, such as a chip, or may be a device including the terminal device. The functions of the terminal device may be implemented by hardware, or may be implemented by hardware executing corresponding software, where the hardware or software includes one or more modules corresponding to the functions.

In one possible design, the communication device includes a processing module and a transceiver module in a structure, where the processing module is configured to support the communication device to perform a corresponding function in any one of the designs of the first aspect or perform a corresponding function in any one of the designs of the second aspect or the second aspect. The transceiver module is configured to support communication between the communication apparatus and other communication devices, for example, receive a sidelink channel status information reference signal from the second terminal device, or transmit channel status information to the second terminal device. The communication device may also include a memory module, coupled to the processing module, that stores program instructions and data necessary for the communication device. As an example, the processing module may be a processor, the communication module may be a transceiver, the storage module may be a memory, and the memory may be integrated with the processor or disposed separately from the processor, which is not limited in this application.

In another possible design, the communication device may be configured to include a processor and a memory, where the processor is coupled to the memory and configured to execute computer program instructions stored in the memory to cause the communication device to perform the method in the first aspect or any one of the possible designs of the first aspect or the second aspect or any one of the possible designs of the second aspect. Optionally, the communication device further comprises a communication interface, the processor being coupled to the communication interface. When the communication device is a terminal device, the communication interface may be a transceiver or an input/output interface; when the communication means is a chip included in the terminal device, the communication interface may be an input/output interface of the chip. Alternatively, the transceiver may be a transmit-receive circuit and the input/output interface may be an input/output circuit.

In a fourth aspect, an embodiment of the present application provides a chip system, including: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the system-on-chip to implement the method in any one of the possible designs of the first aspect described above or the method in any one of the possible designs of the second aspect described above.

Optionally, the system on a chip may have one or more processors. The processor may be implemented by hardware or by software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general-purpose processor implemented by reading software code stored in a memory.

Optionally, the memory in the system-on-chip may also be one or more. The memory may be integrated with the processor or may be separate from the processor, which is not limited in this application. For example, the memory may be a non-transitory processor, such as a read only memory ROM, which may be integrated with the processor on the same chip or separately disposed on different chips, and the type of the memory and the arrangement of the memory and the processor are not particularly limited in this application.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium having computer-readable instructions stored thereon, which, when read and executed by a computer, cause the computer to perform the method in any one of the possible designs of the first aspect or the method in any one of the possible designs of the second aspect.

In a sixth aspect, embodiments of the present application provide a computer program product, which when read and executed by a computer, causes the computer to perform the method in any one of the possible designs of the first aspect or the second aspect.

Drawings

Fig. 1 is a schematic diagram of a network architecture of a communication system to which an embodiment of the present application is applicable;

fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a compact PSSCH provided by an embodiment of the application;

fig. 4 is a schematic diagram of detecting channel state information by a second terminal device according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of another compact PSSCH provided by an embodiment of the application;

fig. 6 is a schematic diagram illustrating transmission of sidelink channel status information configuration information provided in an embodiment of the present application;

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

fig. 8 is another schematic structural diagram of a communication device according to an embodiment of the present disclosure.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: global system for mobile communications (GSM) systems, Code Division Multiple Access (CDMA) systems, Wideband Code Division Multiple Access (WCDMA) systems, General Packet Radio Service (GPRS), Long Term Evolution (LTE) systems, LTE Frequency Division Duplex (FDD) systems, LTE Time Division Duplex (TDD), universal mobile telecommunications system (universal mobile telecommunications system, UMTS), worldwide interoperability for microwave access (world wide) systems, max) communication systems, fifth generation (5G) systems or new NR systems, or other similar communication systems for future use in or future communication systems.

In addition, the technical solution provided in the embodiment of the present application may be applied to a cellular link, and may also be applied to a link between devices, for example, a device to device (D2D) link. The D2D link or the V2X link may also be referred to as a side link, a secondary link, a sidelink, or the like. In the embodiments of the present application, the above terms all refer to links established between devices of the same type, and have the same meaning. The devices of the same type may be links from the terminal device to the terminal device, links from the base station to the base station, links from the relay node to the relay node, and the like, which are not limited in this embodiment of the present application. For the link between the terminal device and the terminal device, there is a D2D link defined by release (Rel) -12/13 of 3GPP, and also a V2X link defined by 3GPP for the internet of vehicles, vehicle-to-vehicle, vehicle-to-cell, or vehicle-to-any entity, including Rel-14/15. But also the Rel-16 and subsequent releases of NR system based V2X link currently under investigation by 3 GPP.

Please refer to fig. 1, which is a schematic diagram of a network architecture of a communication system according to an embodiment of the present application. The communication system includes a terminal device 110 and a terminal device 120. The terminal equipment and the terminal equipment can be in direct communication through a PC5 interface, and a direct communication link between the terminal equipment and the terminal equipment is a sidelink. The sidelink-based communication may use at least one of the following channels: a physical sidelink shared channel (psch) for carrying data (data); a Physical Sidelink Control Channel (PSCCH) for carrying Sidelink Control Information (SCI).

Optionally, the communication system further comprises a network device 130, configured to provide timing synchronization and resource scheduling for the terminal device. The network device may communicate with at least one terminal device (e.g., terminal device 110) via the Uu interface. The communication link between the network device and the terminal device includes an Uplink (UL) and a Downlink (DL). For example, the terminal device 110 may send the data to the network device 130 through the Uu interface, send the data to the application server 140 through the network device 130 for processing, then the application server 140 issues the processed data to the network device 130, and send the processed data to the terminal device 120 through the network device 130. In a communication mode based on the Uu interface, the network device 130 that forwards the uplink data from the terminal device 110 to the application server 140 and the network device 130 that forwards the downlink data sent by the application server 140 to the terminal device 120 may be the same network device or different network devices, and may be determined by the application server.

The network device in fig. 1 may be an access network device, such as a base station. Wherein the access network equipment corresponds to different equipment on different systems, e.g. on the fourth generation mobile communication technology (the 4)^thgeneration, 4G) system may correspond to an eNB, and in a 5G system corresponds to an access network device in 5G, for example, a gNB. Although only the terminal device 110 and the terminal device 120 are shown in fig. 1, it should be understood that the network device may provide services for a plurality of terminal devices, and the number of terminal devices in the communication system is not limited in the embodiments of the present application. Similarly, the terminal device in fig. 1 is described by taking a vehicle-mounted terminal device or a vehicle as an example, and it should be understood that the terminal device in the embodiment of the present application is not limited thereto. It should be understood that the embodiments of the present application are not limited to the 4G or 5G system, and are also applicable to a communication system of a subsequent evolution.

Hereinafter, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

1) A terminal device, which may also be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), etc., is a device that provides voice and/or data connectivity to a user. The terminal device may communicate with a core network via a Radio Access Network (RAN), and exchange voice and/or data with the RAN. For example, the terminal device may be a handheld device, a vehicle-mounted device, or the like having a wireless connection function. Currently, some examples of terminal devices are: a mobile phone (mobile phone), a tablet computer, a notebook computer, a palm top computer, a Mobile Internet Device (MID), a wearable device, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote surgery (remote management), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in home (smart home), and the like. The terminal device in the embodiment of the present application may also be an on-board module, an on-board component, an on-board chip, or an on-board unit that is built in the vehicle as one or more components or units, and the vehicle may implement the method of the present application through the built-in on-board module, the on-board component, the on-board chip, or the on-board unit.

2) The network device is a device in the network for accessing the terminal device to the wireless network. The network device may be a node in a radio access network, which may also be referred to as a base station, and may also be referred to as a Radio Access Network (RAN) node (or device). The network device may be configured to interconvert received air frames and 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 device may also coordinate attribute management for the air interface. For example, the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolved Node B) in a Long Term Evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-a), or may also include a next generation node B (gNB) in a fifth generation mobile communication technology (5G) New Radio (NR) system, or may also include a Transmission Reception Point (TRP), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a baseband unit (BBU), or a WiFi Access Point (AP), and the like, or may further include a Centralized Unit (CU) and a Distributed Unit (DU) in a cloud access network (cloudsran) system, which is not limited in the embodiment of the present application. As another example, one type of network device in V2X technology is a Road Side Unit (RSU), which may be a fixed infrastructure entity supporting V2X applications and may exchange messages with other entities supporting V2X applications.

3) The terms "system" and "network" in the embodiments of the present application may be used interchangeably. The "plurality" means two or more, and in view of this, the "plurality" may also be understood as "at least two" in the embodiments of the present application. "at least one" is to be understood as meaning one or more, for example one, two or more. For example, the inclusion of at least one means that one, two or more are included, and does not limit which is included. For example, at least one of A, B and C is included, then inclusion can be A, B, C, A and B, A and C, B and C, or A and B and C. Similarly, the understanding of the description of "at least one" and the like is similar. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" generally indicates that the preceding and following related objects are in an "or" relationship, unless otherwise specified.

Unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing between a plurality of objects, and do not define the order, sequence, priority, or importance of the plurality of objects, and the descriptions of "first", "second", etc., do not define that the objects are necessarily different.

Referring to fig. 2, a flow chart of a communication method according to an embodiment of the present application is shown, where the method includes steps S201 to S203 as follows:

step S201, the first terminal device receives a sidelink channel status information reference signal from the second terminal device.

The side-link CSI-RS signal may be a CSI-RS signal transmitted on a side-link.

Step S202, the first terminal device determines Channel State Information (CSI) according to the sideline channel state information reference signal.

In this embodiment, the first terminal device may determine the channel state information according to the side channel state information reference signal, where the first terminal device measures the side channel state information reference signal received in step S201 to obtain the channel state information, where the channel state information includes one or more parameters and may be configured by the second terminal device.

Step S203, the first terminal device sends channel state information to the second terminal device.

In the embodiment of the present application, the channel state information is carried on a first sidelink data channel, and a bandwidth of the first sidelink data channel is smaller than a minimum sub-channel (sub-channel) bandwidth. For example, the first sidelink data channel may be a psch, and the first terminal device measures a sidelink CSI-RS transmitted by the second terminal device and transmits CSI to the second terminal device on the psch, which may specifically include that the first terminal device performs channel coding on each information bit included in the CSI, adds Cyclic Redundancy Check (CRC), then performs modulation, and maps the modulated symbols to each Resource Element (RE) included in the psch one by one.

It should be understood that the bandwidth of the first sidelink data channel in the embodiment of the present application is smaller than the minimum sub-channel bandwidth compared with the existing PSSCH for carrying data. In general, a minimum subchannel bandwidth usable in a communication system may be set in advance, and the minimum subchannel bandwidth may be in units of subcarriers, and the minimum subchannel bandwidth may be q RBs, where q is a natural number. The network device may configure a bandwidth of the data channel or the control channel according to the minimum sub-channel bandwidth, and the bandwidth of the data channel scheduled by the network device is an integer multiple of the minimum sub-channel bandwidth. For example, the minimum sub-channel bandwidth of the psch currently used for data scheduling is generally 4 Resource Blocks (RBs) or more, and the bandwidth of the psch used for carrying CSI in the embodiment of the present application may be less than 4 RBs, for example, may be 1 to 2 RBs. For another example, the minimum subchannel bandwidth may also be set to 2RB, in which case, the bandwidth of the psch for carrying CSI in the embodiment of the present application may be less than 2RB, such as 1 RB. Thus, the first sidelink data channel may be referred to as a compact psch (compactpsch). In the case of transmitting CSI only to the second terminal device, the first terminal device uses such a compact psch to carry CSI, which can effectively save system resources.

In this embodiment, the first terminal device may further send first control information to the second terminal device, where the first control information is used to indicate the channel state information. The first control information is carried on a first sidelink control channel corresponding to the first sidelink data channel. For example, the first sidelink data channel carrying the CSI is a compact PSCCH, and the first terminal device may transmit the first control information to the second terminal device on the PSCCH corresponding to the compact PSCCH. In this way, the second terminal device can correctly decode the PSCCH content by detecting and analyzing the PSCCH content, so as to obtain the CSI reported by the first terminal device.

In one possible design, the first control information may include a Modulation and Coding Scheme (MCS) used by the channel state information sent by the first terminal device, so that the second terminal device decodes the channel state information after receiving the first control information. The first control information may further include a source node identifier (source node ID) and a destination node identifier (destination node ID). Here, the source node identifier refers to an identifier of the first terminal device, and the destination node identifier refers to an identifier of the second terminal device, and indicates that the first control information is sent from the first terminal device to the second terminal device, so that the second terminal device can detect the information sent to itself. The first control information may be carried in Sidelink Control Information (SCI) by the first terminal device and sent to the second terminal device, or may be sent in another manner, and the present application is not limited thereto. For example, a first terminal device may send a CSI report message to a second terminal device, where the CSI report message includes first control information and channel state information.

Please refer to fig. 3, which is a schematic structural diagram of a compact psch according to an embodiment of the present application. In one slot (slot), the compact PSSCH has a PSCCH corresponding to the PSSCH and indicating the PSSCH, and the PSCCH has the same bandwidth as the compact PSSCH and is smaller than the minimum sub-channel bandwidth. The compact PSCCH, the PSCCH corresponding to the PSCCH, an Automatic Gain Control (AGC) symbol, and a reserved GAP (GAP) symbol together form a resource set for reporting CSI information.

As shown in fig. 3, the compact PSCCH, the PSCCH corresponding to the PSCCH, the AGC symbol, and the GAP symbol include 14 time domain symbols, which occupy the entire slot. The AGC symbol is used for controlling the power of received data by a receiver of the second terminal equipment so as to prevent the received power from exceeding the maximum dynamic range to cause error codes, the GAP symbol is used for transceiving conversion between frames, and the AGC symbol and the GAP symbol respectively occupy a time domain symbol. And the PSCCH is used to indicate the PSCCH so that the receiver can correctly decode the PSCCH. The PSSCH is used to carry CSI information. For example, when receiving the CSI, the second terminal device may first blindly detect a PSCCH corresponding to the PSCCH as shown in fig. 4, and decode, after detecting the PSCCH, CSI information carried in the PSCCH according to a correspondence between the PSCCH and the PSCCH.

It should be understood that the number of time domain symbols occupied by the compact PSCCH and the corresponding PSCCH shown in fig. 3 is only an example, and in practical applications, the sum of the number of time domain symbols occupied by the compact PSCCH and the PSCCH is 12, but the number of time domain symbols occupied by the PSCCH may be greater than or equal to 3 and less than or equal to 9, and the number of time domain symbols occupied by the corresponding PSCCH may be determined according to the number of time domain symbols occupied by the PSCCH.

Please refer to fig. 5, which is a schematic structural diagram of another compact psch according to an embodiment of the present application. In the structure of the compact psch, a slot includes a compact psch for carrying CSI information, an AGC symbol and a GAP symbol, and as in the former structure, the compact psch has a bandwidth smaller than the minimum sub-channel bandwidth, for example, 1 or 2 RBs, and the AGC symbol and the GAP symbol each occupy a time domain symbol for AGC and frame transceiving conversion. However, the structure shown in fig. 5 does not include PSCCH corresponding to compact PSCCH, which occupies 12 time domain symbols in one slot. That is, when adopting such a compact psch structure, the first terminal device does not transmit the first control information to the second terminal device, which requires the second terminal device to directly perform blind detection on the psch when receiving CSI information.

In the embodiment of the present application, as shown in step S200 in fig. 6, the first terminal device may further receive the sidelink channel status information configuration information, i.e., the sidelink CSI config, from the second terminal device. The side-row channel state information configuration information is used for indicating or triggering the first terminal device to send channel state information according to the received side-row channel state information reference signal. The sidelink channel status information configuration information may be carried by the second terminal device in Sidelink Control Information (SCI) and sent to the second terminal device, or may be sent through a separate Radio Resource Control (RRC) signaling or other manners, which is not limited in the present application. And the PSCCH carrying the side-row channel state information configuration information can be sent independently without being multiplexed with the PSSCH.

In one possible design, the sidelink channel state information configuration information may include time domain granularity and/or frequency domain granularity of the measurement sidelink channel state information reference signal, and parameters included in the channel state information. The part of configuration information belongs to a measurement configuration part in side-row channel state information configuration information, where the time-domain granularity of a measurement side-row channel state information reference signal refers to how many CSI-RSs are measured on time-domain symbols, the frequency-domain granularity of the measurement side-row channel state information reference signal refers to whether CSI is measured based on RBs or based on subchannels, and parameters included in the channel state information refer to CSI parameters that need to be reported, and the CSI parameters may include one or more of Channel Quality Indicator (CQI), Rank Indicator (RI), Precoding Matrix Indicator (PMI), and Reference Signal Received Power (RSRP). In this way, after receiving the sidelink csi configuration information, the first terminal device may measure the sidelink csi reference signal according to the measurement configuration in the sidelink csi configuration information, so as to obtain the csi.

The sidelink channel state information configuration information may further include one or more items of transmission resources, transmission times and transmission time intervals of the channel state information. The part of the configuration information belongs to a reporting configuration part in the configuration information of the channel state information of the sideline, wherein the sending resource of the channel state information refers to a time domain resource or a time frequency resource which can be used by the first terminal equipment for sending the channel state information; the number of times of sending the channel state information refers to the number of times of repeatedly sending the channel state information after the first terminal device receives the sideline channel state information configuration information, and can also be understood as the number of times of sending the channel state information; the transmission time interval of the channel state information refers to a transmission time interval between two adjacent channel state information when the first terminal device repeatedly transmits the channel state information for multiple times. Thus, after receiving the sideline channel status information configuration information, the first terminal device can send the channel status information according to the reporting mode indicated by the second terminal device in the sideline channel status information configuration information.

It should be noted that the configuration information of the sideline channel status information may further include a source node identifier and a destination node identifier, where the source node identifier refers to an identifier of the second terminal device, and the destination node identifier refers to an identifier of the first terminal device, and indicates that the configuration information of the sideline channel status information is sent to the first terminal device by the second terminal device. It should be understood that the configuration of the sidelink csi may further include other information, for example, a pattern (pattern) of the sidelink csi reference signal, a reporting condition of the csi, and the like, which is not limited in this application.

In step S203, the first terminal device may send the first control information and the channel state information to the second terminal device, and after the first terminal device completes the sending times and sending time interval indicated in the sidelink channel state information configuration information, the process of reporting the channel state information once is finished. After that, if the first terminal device receives the sideline channel status information configuration information sent by the second terminal device again, the next channel status information reporting process is triggered.

Referring to fig. 7, a schematic structural diagram of a communication device according to an embodiment of the present application is shown, where the communication device 700 includes: a transceiver module 710 and a processing module 720. The communication device may be configured to implement the functionality related to the first terminal device in any of the above method embodiments, or to implement the functionality related to the second terminal device in any of the above method embodiments. For example, the communication device may be a terminal device, such as a handheld terminal device or a vehicle-mounted terminal device; the communication device may also be a chip included in a terminal apparatus, or a device including a terminal apparatus, such as various types of vehicles and the like.

When the communication apparatus is used as a first terminal device to execute the method embodiment shown in fig. 2, the processing module 720 is configured to perform an operation of determining channel state information according to the sidelink channel state information reference signal; the transceiver module 710 is configured to perform operations of receiving a sidelink channel status information reference signal from the second terminal device, and transmitting channel status information to the second terminal device.

When the communication apparatus is used as a second terminal device to execute the method embodiment shown in fig. 2, the processing module 720 is configured to perform an operation of determining channel state information according to the first control information; the transceiving module 710 is configured to perform operations such as transmitting a sidelink channel status information reference signal to the first terminal device, and receiving channel status information from the first terminal device.

It should be understood that the transceiver module 710 described above may be replaced by a transmitting module or transmitter when used for the transmitting step, and the transceiver module 710 may be replaced by a receiving module or receiver when used for the receiving step. The processing module 720 involved in the communication apparatus may be implemented by a processor or processor-related circuit components, and the transceiver module 710 may be implemented by a transceiver or transceiver-related circuit components. The operations and/or functions of the modules in the communication apparatus are respectively for implementing the corresponding flows of the methods shown in fig. 2 and fig. 6, and are not described herein again for brevity.

Please refer to fig. 8, which is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication device may specifically be a terminal device. For ease of understanding and illustration, in fig. 8, the terminal device is exemplified by a mobile phone. As shown in fig. 8, the terminal device includes a processor and may further include a memory, and of course, may also include a radio frequency circuit, an antenna, an input/output device, and the like. The processor is mainly used for processing communication protocols and communication data, controlling the terminal equipment, executing software programs, processing data of the software programs and the like. The memory is used primarily for storing software programs and data. The radio frequency circuit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 8. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.

In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function may be regarded as a transceiving unit of the terminal device, and the processor having the processing function may be regarded as a processing unit of the terminal device. As shown in fig. 8, the terminal device includes a transceiving unit 810 and a processing unit 820. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a device used for implementing the receiving function in the transceiver 810 may be regarded as a receiving unit, and a device used for implementing the transmitting function in the transceiver 810 may be regarded as a transmitting unit, that is, the transceiver 810 includes a receiving unit and a transmitting unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc. It should be understood that the transceiver unit 810 is configured to perform the transmitting operation and the receiving operation on the terminal device side in the above method embodiments, the transceiver unit 810 may be replaced by a transmitting unit or a transmitter when used for the transmitting step, the transceiver unit 810 may be replaced by a receiving unit or a receiver when used for the receiving step, and the processing unit 820 is configured to perform other operations besides the transmitting and receiving operation on the terminal device in the above method embodiments.

An embodiment of the present application further provides a chip system, including: a processor coupled to a memory for storing a program or instructions that, when executed by the processor, cause the system-on-chip to implement the method of any of the above method embodiments.

The system-on-chip may be, for example, a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), a Microcontroller (MCU), a Programmable Logic Device (PLD), or other integrated chips.

It will be appreciated that the steps of the above described method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

The embodiment of the present application further provides a computer-readable storage medium, where computer-readable instructions are stored in the computer-readable storage medium, and when the computer-readable instructions are read and executed by a computer, the computer is enabled to execute the method in any of the above method embodiments.

The embodiments of the present application further provide a computer program product, which when read and executed by a computer, causes the computer to execute the method in any of the above method embodiments.

The embodiment of the application also provides a communication system, which comprises a first terminal device and a second terminal device. Optionally, the communication system may further include a network device.

It should be understood that the processor mentioned in the embodiments of the present application may be a Central Processing Unit (CPU), and may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

It will also be appreciated that the memory referred to in the embodiments of the application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile 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. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM, enhanced SDRAM, SLDRAM, Synchronous Link DRAM (SLDRAM), and direct rambus RAM (DR RAM).

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

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.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. 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 application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

the first terminal equipment receives a sidelink channel state information reference signal from the second terminal equipment;

the first terminal equipment determines channel state information according to the sideline channel state information reference signal;

and the first terminal equipment sends the channel state information to the second terminal equipment, wherein the channel state information is carried on a first side-link data channel, and the bandwidth of the first side-link data channel is less than the minimum sub-channel bandwidth.

2. The method of claim 1, further comprising:

the first terminal device sends first control information to the second terminal device, the first control information is carried on a first sidelink control channel corresponding to the first sidelink data channel, and the first control information is used for indicating the channel state information.

3. The method of claim 2, wherein the first control information comprises a Modulation and Coding Scheme (MCS) adopted by the channel state information.

4. The method according to any one of claims 1 to 3, further comprising:

The first terminal equipment receives lateral channel state information configuration information from the second terminal equipment;

the first terminal equipment determines channel state information according to the sideline channel state information reference signal, and the method comprises the following steps: and the first terminal equipment measures the sidestream channel state information reference signal according to the sidestream channel state information configuration information to obtain the channel state information.

5. The method according to any one of claims 1 to 4, wherein the sidelink channel status information configuration information comprises: measuring the time domain granularity and/or the frequency domain granularity of the sidelink channel state information reference signal and the parameters included by the channel state information;

the channel state information comprises one or more parameters of channel quality indicator CQI, order indicator RI, precoding matrix indicator PMI and reference signal received power RSRP.

6. The method according to any one of claims 1 to 5, wherein the sidelink channel status information configuration information comprises: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information;

the sending, by the first terminal device, the channel state information to the second terminal device includes: and the first terminal equipment sends the channel state information to the second terminal equipment according to the channel state information configuration information of the side row.

7. A method of communication, comprising:

the second terminal equipment sends a side-row channel state information reference signal to the first terminal equipment;

the second terminal device receives channel state information from the first terminal device, wherein the channel state information is determined by the first terminal device according to the side channel state information reference signal, the channel state information is carried on a first side link data channel, and the bandwidth of the first side link data channel is smaller than the minimum sub-channel bandwidth.

8. The method of claim 7, further comprising:

and the second terminal equipment receives first control information from the first terminal equipment, wherein the first control information is carried on a first side-link control channel corresponding to the first side-link data channel, and the first control information is used for indicating the channel state information.

9. The method of claim 8, wherein the first control information comprises a Modulation and Coding Scheme (MCS) adopted by the channel state information.

10. The method according to any one of claims 7 to 9, further comprising:

And the second terminal equipment sends lateral channel state information configuration information to the first terminal equipment, wherein the lateral channel state information configuration information is used for indicating the first terminal equipment to measure the lateral channel state information reference signal to obtain the channel state information.

11. The method according to any one of claims 7 to 10, wherein the sidelink channel status information configuration information comprises: measuring the time domain granularity and/or the frequency domain granularity of the sidelink channel state information reference signal and the parameters included by the channel state information;

12. The method according to any one of claims 7 to 11, wherein the sidelink channel status information configuration information comprises: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information;

the second terminal device receiving the channel state information from the first terminal device comprises: and the second terminal equipment receives the channel state information sent by the first terminal equipment according to the sidestream channel state information configuration information.

13. A communications apparatus, comprising:

the receiving and sending module is used for receiving a sideline channel state information reference signal from the second terminal equipment;

the processing module is used for determining channel state information according to the sideline channel state information reference signal;

the transceiver module is further configured to send the channel state information to the second terminal device, where the channel state information is carried on a first sidelink data channel, and a bandwidth of the first sidelink data channel is smaller than a minimum sub-channel bandwidth.

14. The apparatus of claim 13, wherein the transceiver module is further configured to:

and sending first control information to the second terminal device, wherein the first control information is carried on a first sidelink control channel corresponding to the first sidelink data channel, and the first control information is used for indicating the channel state information.

15. The apparatus of claim 14, wherein the first control information comprises a Modulation and Coding Scheme (MCS) adopted by the channel state information.

16. The apparatus according to any one of claims 13 to 15, wherein the transceiver module is further configured to:

Receiving sidelink channel status information configuration information from the second terminal device;

the processing module is specifically configured to: and measuring the side-row channel state information reference signal according to the side-row channel state information configuration information to obtain the channel state information.

17. The apparatus according to any one of claims 13 to 16, wherein the sidelink channel status information configuration information comprises: measuring the time domain granularity and/or the frequency domain granularity of the sidelink channel state information reference signal and the parameters included by the channel state information;

18. The apparatus according to any of claims 13 to 17, wherein the sidelink channel status information configuration information comprises: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information;

the transceiver module is specifically configured to: and sending the channel state information to the second terminal equipment according to the side-row channel state information configuration information.

19. A communications apparatus, comprising:

the receiving and sending module is used for sending a sideline channel state information reference signal to the first terminal equipment;

the transceiver module is further configured to receive channel state information from the first terminal device, where the channel state information is determined by the first terminal device according to the sidelink channel state information reference signal, the channel state information is carried on a first sidelink data channel, and a bandwidth of the first sidelink data channel is smaller than a minimum sub-channel bandwidth.

20. The apparatus of claim 19, wherein the transceiver module is further configured to:

receiving first control information from the first terminal device, wherein the first control information is carried on a first sidelink control channel corresponding to the first sidelink data channel;

the apparatus further includes a processing module, which is further configured to determine the channel state information according to the first control information.

21. The apparatus of claim 20, wherein the first control information comprises a Modulation and Coding Scheme (MCS) adopted by the channel state information.

22. The apparatus according to any one of claims 19 to 21, wherein the transceiver module is further configured to:

And sending side-row channel state information configuration information to the first terminal equipment, wherein the side-row channel state information configuration information is used for indicating the first terminal equipment to measure the side-row channel state information reference signal to obtain the channel state information.

23. The apparatus according to any one of claims 19 to 22, wherein the sidelink channel status information configuration information comprises: measuring the time domain granularity and/or the frequency domain granularity of the sidelink channel state information reference signal and the parameters included by the channel state information;

24. The apparatus according to any one of claims 19 to 23, wherein the sidelink channel status information configuration information comprises: one or more items of transmission resources, transmission times and transmission time intervals of the channel state information;

the transceiver module is specifically configured to: and receiving the channel state information sent by the first terminal device according to the sideline channel state information configuration information.

25. An apparatus for communication, the apparatus comprising at least one processor coupled with at least one memory:

the at least one processor configured to execute computer programs or instructions stored in the at least one memory to cause the apparatus to perform the method of any of claims 1-6.

26. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when read and executed by a computer, cause the computer to perform the method of any one of claims 1 to 6.

27. An apparatus for communication, the apparatus comprising at least one processor coupled with at least one memory:

the at least one processor configured to execute computer programs or instructions stored in the at least one memory to cause the apparatus to perform the method of any of claims 7 to 12.

28. A computer-readable storage medium, having stored thereon a computer program or instructions, which, when read and executed by a computer, cause the computer to perform the method of any one of claims 7 to 12.