CN114451000B

CN114451000B - Data transmission method and device

Info

Publication number: CN114451000B
Application number: CN202080068940.8A
Authority: CN
Inventors: 赵振山; 卢前溪
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-01-16
Filing date: 2020-01-16
Publication date: 2023-08-22
Anticipated expiration: 2040-01-16
Also published as: WO2021142727A1; CN114451000A

Abstract

The embodiment of the application provides a data transmission method and a data transmission device, wherein a sending terminal sends indication information to a receiving terminal under the condition that lateral transmission and uplink transmission are overlapped, and the indication information is used for determining that RSRP measurement is not performed or layer 3 filtering is not performed by the receiving terminal; or under the condition that the lateral transmission and the uplink transmission are overlapped, the transmitting terminal gives up the lateral transmission; or in the case that the transmitting terminal needs to perform power control according to the side downlink path loss and the downlink path loss, the side-running RSRP sent by the receiving terminal to the transmitting terminal is not subjected to layer 3 filtering. By adopting the embodiment of the application, the receiving terminal is prevented from sending inaccurate RSRP to the sending terminal, and the sending terminal is prevented from estimating inaccurate side uplink path loss.

Description

Data transmission method and device

Technical Field

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

Background

In a New Radio, NR) -vehicle to other devices (Vehicle to Everything, V2X), a sidelink power control mechanism is introduced, and if the terminal performs power control according to the sidelink path loss, the terminal needs to estimate the sidelink path loss. The transmitting terminal estimates the sidelink path loss based on the sidelink reference signal received power (Reference Signal Received Power, RSRP) fed back by the receiving terminal. The sidestream RSRP fed back by the receiving terminal is obtained by measuring the receiving terminal according to the sidestream reference signal sent by the sending terminal.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device.

In a first aspect, an embodiment of the present application provides a data transmission method, applied to a first terminal device, where the method includes:

when the transmission power of the side transmission and the uplink transmission of the first terminal device overlap on the first time unit, and the sum of the transmission power of the side transmission and the transmission power of the uplink transmission is greater than the maximum transmission power of the first terminal device, and the priority of the uplink transmission is higher than the priority of the side transmission, the transmission power of the side transmission is reduced, and indication information is sent to the second terminal device, wherein the indication information is used for determining that the side reference signal of the first time unit is not used for RSRP measurement, or determining that the side RSRP obtained by using the side reference signal of the first time unit is not used for RSRP measurement for layer 3 filtering.

In a second aspect, an embodiment of the present application provides a data transmission method, applied to a second terminal device, where the method includes:

receiving indication information sent by a first terminal device, wherein the indication information is used for determining that a sidestream reference signal of a first time unit is not used for RSRP measurement, or determining that a sidestream RSRP obtained by using the sidestream reference signal of the first time unit is not used for performing layer 3 filtering;

And based on the indication information, giving up using the sidestream reference signal of the first time unit to perform RSRP measurement, or using the sidestream reference signal of the first time unit to perform RSRP measurement, so as to obtain sidestream RSRP, wherein the sidestream RSRP does not perform layer 3 filtering.

It can be seen that the transmitting terminal sends indication information to the receiving terminal, so that the receiving terminal determines that RSRP measurement is not performed or determines that layer 3 filtering is not performed, thereby avoiding that the receiving terminal sends a side RSRP for the transmitting terminal, which cannot accurately estimate the side link loss, further avoiding that the transmitting terminal estimates the inaccurate side link loss, and finally avoiding that the transmitting terminal performs inaccurate power control.

In a third aspect, an embodiment of the present application provides a data transmission method, applied to a terminal device, where the method includes:

and when the lateral transmission and the uplink transmission of the terminal equipment are overlapped on a first time unit, giving up the lateral transmission on the first time unit and carrying out the uplink transmission under the condition that the sum of the transmission power of the lateral transmission and the transmission power of the uplink transmission is larger than the maximum transmission power of the terminal equipment and the priority of the uplink transmission is higher than the priority of the lateral transmission.

It can be seen that, under the condition that the side transmission and the uplink transmission overlap, the transmitting end terminal gives up the side transmission, so that the receiving end terminal cannot receive the side reference signal, and further, the receiving end terminal does not have the side reference signal for RSRP measurement, thereby avoiding that the receiving end terminal transmits the side RSRP for which the side link loss cannot be accurately estimated to the transmitting end terminal, further, avoiding that the transmitting end terminal estimates the inaccurate side link loss, and finally, avoiding that the transmitting end terminal performs inaccurate power control.

In a fourth aspect, an embodiment of the present application provides a data transmission method, applied to a first terminal device, where the method includes:

and receiving the lateral RSRP sent by the second terminal equipment, wherein the first terminal equipment needs to perform power control according to the lateral link loss and the downlink loss, when the second terminal equipment measures the lateral RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

In a fifth aspect, an embodiment of the present application provides a data transmission method, applied to a second terminal device, where the method includes:

and transmitting a sidestream RSRP to the first terminal equipment, wherein when the second terminal equipment measures the sidestream RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

It can be seen that, under the condition that the transmitting terminal needs to perform power control according to the side downlink path loss and the downlink path loss, the side RSRP sent by the receiving terminal to the transmitting terminal is not filtered by the layer 3, so that the receiving terminal is prevented from sending the side RSRP which cannot accurately estimate the side downlink path loss to the transmitting terminal, further, the transmitting terminal is prevented from estimating the inaccurate side downlink path loss, and finally, the transmitting terminal is prevented from performing inaccurate power control.

In a sixth aspect, an embodiment of the present application provides a data transmission apparatus, applied to a first terminal device, where the apparatus includes:

a power adjustment unit, configured to, when, at a first time unit, a sidelink transmission and an uplink transmission of the first terminal device overlap, and when a sum of a transmission power of the sidelink transmission and a transmission power of the uplink transmission is greater than a maximum transmission power of the first terminal device, and a priority of the uplink transmission is higher than a priority of the sidelink transmission, reduce the transmission power of the sidelink transmission;

and the communication unit is used for sending indication information to the second terminal equipment, wherein the indication information is used for determining that the RSRP measurement is not performed by using the sidestream reference signal of the first time unit or determining that the sidestream RSRP obtained by performing the RSRP measurement by using the sidestream reference signal of the first time unit is not subjected to layer 3 filtering.

In a seventh aspect, an embodiment of the present application provides a data transmission apparatus, applied to a second terminal device, where the apparatus includes:

the communication unit is used for receiving indication information sent by the first terminal equipment, wherein the indication information is used for determining that the RSRP measurement is not performed by using the sidestream reference signal of the first time unit, or determining that the sidestream RSRP obtained by performing the RSRP measurement by using the sidestream reference signal of the first time unit is not subjected to layer 3 filtering;

and the measurement unit is used for giving up using the sidestream reference signal of the first time unit to perform RSRP measurement or using the sidestream reference signal of the first time unit to perform RSRP measurement based on the indication information to obtain sidestream RSRP, wherein the sidestream RSRP does not perform layer 3 filtering.

In an eighth aspect, an embodiment of the present application provides a data transmission apparatus, applied to a terminal device, where the apparatus includes:

and the communication unit is used for giving up the side transmission on the first time unit to carry out the uplink transmission when the side transmission and the uplink transmission of the terminal equipment overlap on the first time unit, the sum of the transmission power of the side transmission and the transmission power of the uplink transmission is larger than the maximum transmission power of the terminal equipment, and the priority of the uplink transmission is higher than the priority of the side transmission.

In a ninth aspect, an embodiment of the present application provides a data transmission apparatus, applied to a first terminal device, where the apparatus includes:

and the communication unit is used for receiving the lateral RSRP sent by the second terminal equipment, the first terminal equipment needs to perform power control according to the lateral link loss and the downlink loss, when the second terminal equipment measures the lateral RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

In a tenth aspect, an embodiment of the present application provides a data transmission apparatus, applied to a second terminal device, where the apparatus includes:

and the communication unit is used for sending the side line RSRP to the first terminal equipment, and when the second terminal equipment measures the side line RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

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

In a twelfth aspect, embodiments of the present application provide a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange. Wherein the above-mentioned computer program causes a computer to perform some or all of the steps described in the method according to any one of the first to fifth aspects of the embodiments of the present application.

In a thirteenth aspect, embodiments of the present application provide a computer program product, wherein the computer program product comprises a non-transitory computer readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps described in the method according to any one of the first to fifth aspects of the embodiments of the present application. The computer program product may be a software installation package.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a network architecture provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of another network architecture provided by an embodiment of the present application;

fig. 3 is a schematic diagram of unicast transmission according to an embodiment of the present application;

fig. 4 is a schematic diagram of a multicast transmission according to an embodiment of the present application;

fig. 5 is a schematic diagram of a broadcast transmission according to an embodiment of the present application;

fig. 6 is a schematic flow chart of a data transmission method according to an embodiment of the present application;

FIG. 7 is a schematic diagram of data transmission according to an embodiment of the present application;

fig. 8 is a flow chart of another data transmission method according to an embodiment of the present application;

fig. 9 is a flowchart of another data transmission method according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

fig. 12 is a schematic structural diagram of another data transmission device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of another data transmission device according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of another data transmission device according to an embodiment of the present application;

Fig. 15 is a schematic structural diagram of another data transmission device according to an embodiment of the present application.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application. The terms "first," "second," "third," and "fourth" in the description and claims of the application and in the drawings, etc. are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

The terminal equipment provided by the application is equipment with a wireless communication function, can be deployed on land, and comprises indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on an aircraft, balloon, satellite, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in an industrial control (industrial control), a wireless terminal in a self driving (self driving), a wireless terminal in a remote medical (remote medical), a wireless terminal in a smart grid (smart grid), a wireless terminal in a smart home (smart home), or the like. The terminal device may also be a handheld device, an in-vehicle device, a wearable device, a computer device, or other processing device connected to a wireless modem, etc. with wireless communication capabilities. Terminal devices in different networks may be called different names, for example: a terminal device, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent or user equipment, a cellular telephone, a cordless telephone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a terminal device in a 5G network or future evolution network, and the like.

The network device in the present application is a device deployed in a radio access network to provide wireless communication functions. For example, the network device may be a radio access network (Radio Access Network, RAN) device on the access network side in a cellular network, where the RAN device is a device that accesses a terminal device to the wireless network, including but not limited to: an evolved Node B (eNB), a radio network controller (radio network controller, RNC), a Node B (Node B, NB), a Base station controller (Base Station Controller, BSC), a Base transceiver station (Base Transceiver Station, BTS), a Home Base station (e.g., home evolved Node B, or Home Node B, HNB), a baseband Unit (BBU), a management entity (Mobility Management Entity, MME); as another example, the network device may also be a node device in a wireless local area network (Wireless Local Area Network, WLAN), such as an Access controller (Access controller, AC), gateway, or WIFI Access Point (AP); as another example, the network device may be a transmission node or a transceiver point (transmission reception point, TRP or TP) in an NR system.

The first time unit in the present application is a time slot, one or a set of time domain complexes, etc.

Device-to-Device communication is based on a side-link (SL) transmission technique of terminal-to-terminal (D2D), with higher spectral efficiency and lower transmission delay. The internet of vehicles system adopts a terminal-to-terminal direct communication mode, and two transmission modes are defined in 3 GPP:

first mode: as shown in fig. 1, the transmission resources of the terminal are allocated by the network device, and the terminal performs data transmission on the side link according to the resources allocated by the network device; the network device may allocate resources for single transmission to the terminal, or may allocate resources for semi-static transmission to the terminal.

Second mode: as shown in fig. 2, the terminal selects a resource in the resource pool to transmit data on the side link.

In NR-V2X, automatic driving needs to be supported, and thus, higher demands are placed on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc.

In long term evolution (Long Term Evaluation, LTE) -V2X, a broadcast transmission scheme is supported. In NR-V2X, unicast and multicast transmission modes are introduced. For unicast transmission, the receiving terminal has only one terminal, as in fig. 3, and unicast transmission is performed between the terminal 1 and the terminal 2. For multicast transmission, the receiving end terminals are all terminals in a communication group, or all terminals in a certain transmission distance, as shown in fig. 4, the terminal 1, the terminal 2, the terminal 3 and the terminal 4 form a communication group, wherein the terminal 1 sends data, and other terminals in the group are all receiving end terminals. For the broadcast transmission mode, the receiving terminal is any one of the terminals, as shown in fig. 5, where the terminal 1 is a transmitting terminal, and other terminals around the transmitting terminal are all receiving terminals.

In NR-V2X, a side-by-side feedback channel is introduced for improved reliability. For example, for unicast transmission, the transmitting end terminal sends sidestream data (such as physical sidestream control channel (Physical Sidelink Control Channel, PSCCH), physical sidestream shared channel (Physical Sidelink Shared Channel, PSSCH), etc.) to the receiving end terminal, and the receiving end terminal sends hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback information to the transmitting end terminal, and the transmitting end terminal determines whether retransmission is needed according to the feedback information of the receiving end terminal. Wherein the HARQ feedback information is carried in a sidestream feedback channel, e.g. a physical sidestream feedback channel (Physical Sidelink Feedback Channel, PSFCH).

The side feedback can be activated or deactivated through the pre-configuration information or the network configuration information, if the side feedback is activated, the receiving terminal receives the side data sent by the sending terminal, and feeds back HARQ ACK or NACK to the sending terminal according to the detection result, and the sending terminal decides to send retransmission data or new data according to the feedback information of the receiving terminal; if the sidestream feedback is deactivated, the receiving end terminal does not need to send feedback information, and the transmitting end terminal generally adopts a blind retransmission mode to send data, for example, the transmitting end terminal repeatedly sends K times for each sidestream data, wherein K is more than or equal to 1.

In NR-V2X, a sidelink power control mechanism is introduced, where when a terminal is located outside a coverage area of a cell, the terminal needs to perform power control according to a sidelink path loss, and when the terminal is located within the coverage area of the cell, the terminal needs to perform power control according to the sidelink path loss and a downlink path loss. In a cell, when transmitting side uplink data, a terminal needs to perform power control according to downlink path loss and side downlink path loss, specifically including:

P _PSSCH ＝min(P _CMAX ，P _MAX，CBR ，min(P _PSSCH，D ，P _PSSCH，SL ))[dBm]

wherein P is _PSSCH Representing the transmit power of the side-link after power control, P _CMAX Indicating maximum transmit power of terminal, P _MAX，CBR Maximum transmit power, P, based on measured channel busy rate (Channel Busy Ratio, CBR) representing network device configuration _PSSCH，D Representing transmit power, P, determined based on downlink path loss _PSSCH，SL The transmission power determined based on the side-uplink path loss is shown.

The network device may configure the terminal to perform power control based on the downlink loss only, or based on the side downlink loss only, or based on both the side and downlink losses.

If the terminal performs power control based on the side-link loss, the terminal needs to estimate the side-link loss. The way to estimate the side-link loss is: the transmitting terminal transmits the sidestream data and the sidestream reference signal; the receiving terminal measures according to the sidestream reference signal to obtain a sidestream RSRP; the receiving terminal feeds back the sidestream RSRP to the transmitting terminal, or the receiving terminal carries out layer 3 filtering processing on the measured RSRP and feeds back the filtered RSRP to the transmitting terminal; and the transmitting terminal estimates the side uplink path loss according to the transmitting power and the side RSRP fed back by the receiving terminal.

The receiving terminal performs layer 3 filtering according to a first formula:

a first formula: f (F) _n ＝(1-a)×F _n-1 +aM _n

Wherein M is _n Representing the latest measured RSRP, F _n Representing RSRP, F obtained after layer 3 filtering _n-1 Representing RSRP obtained after the last layer 3 filtering, a is related to the layer 3 filter coefficients, e.g. a=1/2 ^(k/4) ) K is a layer 3 filter coefficient.

The transmitting terminal estimates the side link loss according to the side RSRP fed back by the receiving terminal, and if the transmitting power of the transmitting terminal remains unchanged, the side RSRP fed back by the receiving terminal is equal to the transmitting power of the transmitting terminal minus the side link loss. It can be seen that filtering RSRP is actually a smooth filtering of the side link loss. Because the transmitting power of the transmitting terminal is unchanged, when the receiving terminal feeds back the side-row RSRP, the transmitting terminal can accurately judge the side-row link loss according to the transmitting power and the side-row RSRP fed back by the receiving terminal. If the transmission power of the transmitting terminal changes, the receiving terminal filters the side RSRP, and the change condition of the side link loss cannot be reflected, in this case, the receiving terminal feeds back the side RSRP to the transmitting terminal, and the transmitting terminal cannot accurately judge the side link loss.

Method example 1

Referring to fig. 6, fig. 6 is a flow chart of a data transmission method according to an embodiment of the application, which includes the following steps:

step 601: when the lateral transmission and the uplink transmission of the terminal equipment overlap in a first time unit, the sum of the transmission power of the lateral transmission and the transmission power of the uplink transmission is larger than the maximum transmission power of the terminal equipment, and the priority of the uplink transmission is higher than the priority of the lateral transmission, the terminal equipment gives up the lateral transmission in the first time unit and carries out the uplink transmission.

The overlapping of the side transmission and the uplink transmission of the terminal equipment in the first time unit comprises that the terminal equipment needs to perform uplink transmission and side transmission in the first time unit.

And the transmission power of the side transmission of the terminal equipment is 0 in the first time unit.

For example, as shown in fig. 7, the transmitting terminal uses the transmitting power P1 to transmit PSSCH1, PSSCH2 and PSSCH3, the receiving terminal estimates the side link path loss according to the side link RSRP after receiving the side link RSRP fed back by the receiving terminal from the transmitting terminal to the transmitting terminal 10, and adjusts the transmitting power of the side link according to the side link RSRP, for example, from P1 to P2, the transmitting terminal uses the transmitting power P2 to transmit PSSCH4, PSSCH5 and PSSCH6, the receiving terminal transmits the PUSCH 4 with the transmitting power P2 to the transmitting terminal rssch 11 with the feedback side link RSRP, and the transmitting terminal estimates the side link path loss according to the side link RSRP after receiving the side link RSRP fed back by the receiving terminal, and adjusts the transmitting power of the side link according to the side link RSRP, for example, from P2 to P3, when the transmitting terminal wants to transmit the PSSCH8, the transmitting terminal also needs to transmit uplink data according to P3, the priority of the side link is higher than that of PSSCH8, and the transmitting terminal simultaneously transmits PUSCH 8 with the transmitting power P2 and the PUSCH and the transmitting terminal has the highest priority of the PUSCH 8, and the power is not measured by the transmitting terminal to the transmitting terminal, and the receiving terminal is not measured by the transmitting terminal, and the receiving terminal is not measured to the transmitting terminal, and the receiving terminal is able to be accurately measured, and the signal is avoided, and the quality is not changed by the transmitting terminal and the transmitting terminal is received on the transmitting terminal and the signal.

Method example 2

Referring to fig. 8, fig. 8 is a flowchart of a data transmission method according to an embodiment of the present application, including the following steps:

step 801: when the lateral transmission and the uplink transmission of the first terminal device overlap on the first time unit, the sum of the transmission power of the lateral transmission and the transmission power of the uplink transmission is larger than the maximum transmission power of the terminal device, and the priority of the uplink transmission is higher than the priority of the lateral transmission, the first terminal device reduces the transmission power of the lateral transmission.

Step 802: the first terminal equipment sends indication information to the second terminal equipment, wherein the indication information is used for determining that the RSRP measurement is not performed by using the sidestream reference signal of the first time unit or determining that the sidestream RSRP obtained by performing the RSRP measurement by using the sidestream reference signal of the first time unit is not subjected to layer 3 filtering.

Correspondingly, the second terminal equipment receives the indication information sent by the first terminal equipment.

Step 803: the second terminal device gives up using the sidestream reference signal of the first time unit to perform RSRP measurement, or using the sidestream reference signal of the first time unit to perform RSRP measurement, so as to obtain sidestream RSRP, wherein the sidestream RSRP does not perform layer 3 filtering.

It should be noted that, the first terminal device may be configured to reduce the transmission power of the sidelink transmission and the transmission of the indication information to the second terminal device by the first terminal device may be performed in parallel or may be performed in series.

Wherein the indication information is carried in side-uplink control information (Sidelink Control Information, SCI). In NR-V2X, two-level SCI transmission is supported, the first level SCI is carried in PSCCH, the second level SCI is carried in PSSCH resource, and the indication information is carried in the first level SCI or the second level SCI.

The indication information is carried in a media access Control (Media Access Control, MAC) Element (CE) Control unit, and the MAC CE is carried in side line data carried by the PSSCH.

Optionally, the indication information is used for indicating at least one of the following:

at least one of a change in transmit power of a sidelink transmission by the first terminal device at the first time unit and whether to use a sidelink reference signal of the first time unit for RSRP measurement.

If the indication information is used for indicating that the transmission power of the sidestream transmission performed by the first terminal device on the first time unit is changed, the indication information is used for determining that the sidestream reference signal of the first time unit is not used for performing RSRP measurement, or the indication information is used for determining that the sidestream RSRP obtained by using the sidestream reference signal of the first time unit is not used for performing layer 3 filtering;

and if the indication information is used for indicating that the RSRP measurement is not performed by using the side-row reference signal of the first time unit, the indication information is used for determining that the layer 3 filtering is not performed on the side-row RSRP obtained by performing the RSRP measurement by using the side-row reference signal of the first time unit.

Wherein the indication information comprises a first indication bit and/or a second indication bit. The value of the first indicator bit is used for indicating that the transmission power of the sidestream transmission performed by the first terminal device on the first time unit changes. The bits occupied by the first indication bits may be 1 or more. For example, the first indication bit occupies 1 bit, and a value of 1 for the bit indicates a transmission change in transmission power of the side line transmission.

The value of the second indicator bit is used to indicate whether RSRP measurements are to be made using the side row reference signal of the first time unit. The bits occupied by the second indicator bits may be 1 or more. For example, the second indicator bit occupies 1 bit, a value of 1 for RSRP measurement using no side row reference information, and a value of 0 for RSRP measurement using side row reference information.

Optionally, the sum of the transmission power of the uplink transmission and the adjusted transmission power of the side transmission is smaller than or equal to the maximum transmission power of the terminal device.

For example, as shown in fig. 7, when the transmitting end terminal is to transmit the PSSCH8, the transmitting end terminal is further required to transmit the uplink data PUSCH, the PUSCH has a priority higher than that of the PSSCH8, and the transmitting end terminal simultaneously transmits the PUSCH and the PSSCH8 with a transmission power greater than that of the transmitting end terminal, in which case the transmitting end terminal decreases the transmission power of the PSSCH8 until the sum of the transmission power of the uplink transmission and the transmission power of the side transmission of the transmitting end terminal is less than or equal to that of the transmitting end terminal, the transmitting end terminal transmits the PUSCH with the adjusted transmission power of the side transmission and the transmission power of the uplink transmission, and transmits the indication information to the receiving end terminal, for example, an information field including 1 bit in the second order SCI, with a value of 1, indicating that the receiving end terminal does not measure the RSRP using the side reference signal transmitted by the time unit, thereby avoiding that the receiving end terminal transmits an inaccurate RSRP to the transmitting end terminal.

Method example 3

Referring to fig. 9, fig. 9 is a flowchart of a data transmission method according to an embodiment of the present application, including the following steps:

step 901: and the second terminal equipment transmits a side line RSRP to the first terminal equipment, when the second terminal equipment measures the side line RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

Correspondingly, the first terminal equipment receives the sidestream RSRP sent by the second terminal equipment. The first terminal device needs to perform power control according to the side downlink path loss and the downlink path loss.

It should be noted that, in the embodiment of the present application, after each time the second terminal device measures the side row RSRP, the second terminal device sends the measured side row RSRP to the first terminal device.

The fixed value may be, for example, 0 or other values.

Optionally, the side transmission and the uplink transmission of the first terminal device share a carrier.

Optionally, before step 901, the method further includes:

the second terminal equipment determines that the first terminal equipment needs to perform power control according to the side downlink path loss and the downlink path loss.

Optionally, the determining that the first terminal device needs to perform power control according to the side downlink path loss and the downlink path loss includes: and determining that the first terminal equipment needs to carry out power control according to the side downlink loss and the downlink loss according to the indication information.

Optionally, the indication information is sent by the first terminal device or is carried in configuration information sent by the network device, where the indication information is used to indicate that the first terminal device needs to perform power control according to side downlink path loss and downlink path loss.

Optionally, if the indication information is sent by the first terminal device, the indication information is carried in a SCI sent by the first terminal device to the second terminal device, or the indication information is carried in a MAC CE sent by the first terminal device to the second terminal device, where the MAC CE is carried in side line data, or the indication information is carried in direct communication interface (PC 5) -radio resource control (Radio Resource Control, RRC) information sent by the first terminal device to the second terminal device.

Wherein, in NR-V2X, two-order SCI transmission is supported, the first-order SCI is carried in PSCCH, the second-order SCI is carried in PSSCH resource, and the indication information is carried in the first-order SCI or the second-order SCI.

Optionally, the layer 3 filter coefficients are protocol defined, network device configured, or custom by the second terminal device.

Referring to fig. 10, fig. 10 is a terminal device provided in an embodiment of the present application, where the terminal device includes: one or more processors, one or more memories, one or more communication interfaces, and one or more programs; the one or more programs are stored in the memory and configured to be executed by the one or more processors.

Apparatus corresponding to method example 1

The program includes instructions for performing the steps of:

It should be noted that, the specific implementation process of this embodiment may refer to the specific implementation process described in the foregoing method embodiment 1, which is not described herein.

Device example 2 corresponding to method example 2

The terminal device shown in fig. 10 is a first terminal device, and the program includes instructions for performing the steps of:

In one implementation, the indication information is used to indicate at least one of:

In one implementation, the sum of the transmission power of the uplink transmission and the adjusted transmission power of the sidelink transmission is smaller than or equal to the maximum transmission power of the terminal device.

It should be noted that, the specific implementation process of this embodiment may refer to the specific implementation process described in the foregoing method embodiment 2, which is not described herein.

Device example 3 corresponding to method example 2

The terminal device shown in fig. 10 is a second terminal device, and the program includes instructions for performing the steps of:

and based on the indication information, discarding to perform RSRP measurement by using the sidestream reference signal of the first time unit, or performing RSRP measurement by using the sidestream reference signal of the first time unit to obtain a sidestream RSRP, wherein the sidestream RSRP does not perform layer 3 filtering.

at least one of a transmission power transmission change of the sidestream transmission performed by the first terminal device on the first time unit and whether to use a sidestream reference signal of the first time unit to perform RSRP measurement.

Device example 4 corresponding to method example 3

and when the second terminal equipment measures the sidestream RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value to indicate that the layer 3 filter is not performed.

In one implementation, the side transmission and the uplink transmission of the first terminal device share a carrier.

In one implementation, the program includes instructions for performing the following steps:

And sending indication information to the second terminal equipment, wherein the indication information is used for indicating that the first terminal equipment needs to perform power control according to the side downlink path loss and the downlink path loss.

In one implementation, in sending indication information to the second terminal device, the program includes instructions specifically for:

sending SCI to the second terminal equipment, wherein the SCI carries the indication information;

or sending side line data to the second terminal equipment, wherein the MAC CE of the side line data carries the indication information;

or sending PC5-RRC information to the second terminal equipment, wherein the PC5-RRC information carries the indication information.

It should be noted that, the specific implementation process of this embodiment may refer to the specific implementation process described in the foregoing method embodiment 3, which is not described herein.

Device example 5 corresponding to method example 3

and transmitting a sidestream Reference Signal Received Power (RSRP) to the first terminal equipment, wherein when the second terminal equipment measures the sidestream RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that layer 3 filtering is not performed.

and determining that the first terminal equipment needs to perform power control according to the side downlink path loss and the downlink path loss.

In one implementation, in determining that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss, the program includes instructions specifically for:

and determining that the first terminal equipment needs to carry out power control according to the side downlink loss and the downlink loss according to the indication information.

In one implementation, the indication information is sent by the first terminal device or is carried in configuration information sent by the network device, where the indication information is used to indicate that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

In one implementation, the layer 3 filter coefficients are protocol specified, network device configured, or the second terminal device custom.

Referring to fig. 11, fig. 11 is a data transmission apparatus provided in an embodiment of the present application, which is applied to a terminal device in method embodiment 1, and the apparatus includes:

and a communication unit 1101, configured to, when, in a first time unit, a side transmission and an uplink transmission of the terminal device overlap, and when a sum of a transmission power of the side transmission and a transmission power of the uplink transmission is greater than a maximum transmission power of the terminal device, and a priority of the uplink transmission is higher than a priority of the side transmission, discard the side transmission in the first time unit, and perform the uplink transmission.

Note that the communication unit 1101 may be implemented by a communication interface.

Referring to fig. 12, fig. 12 is a data transmission apparatus provided in an embodiment of the present application, which is applied to a first terminal device in method embodiment 2, and the apparatus includes:

a power adjustment unit 1201, configured to, when, in a first time unit, a sidelink transmission and an uplink transmission of the first terminal device overlap, and when a sum of a transmission power of the sidelink transmission and a transmission power of the uplink transmission is greater than a maximum transmission power of the first terminal device, and a priority of the uplink transmission is higher than a priority of the sidelink transmission, reduce the transmission power of the sidelink transmission;

A communication unit 1202, configured to send indication information to a second terminal device, where the indication information is used to determine that reference signal received power RSRP measurement is not performed using a side reference signal of the first time unit, or to determine that layer 3 filtering is not performed on a side RSRP obtained by performing RSRP measurement using a side reference signal of the first time unit.

It should be noted that, the power adjustment unit 1201 may be implemented by a processor, and the communication unit 1202 may be implemented by a communication interface.

Referring to fig. 13, fig. 13 is a schematic diagram of a data transmission apparatus, which is applied to a second terminal device in method embodiment 2, and includes:

A communication unit 1301, configured to receive indication information sent by a first terminal device, where the indication information is used to determine that reference signal received power RSRP measurement is not performed by using a sidestream reference signal of the first time unit, or determine that layer 3 filtering is not performed on a sidestream RSRP obtained by performing RSRP measurement by using a sidestream reference signal of the first time unit;

the measurement unit 1302 is configured to discard, based on the indication information, performing RSRP measurement using the sideline reference signal of the first time unit, or performing RSRP measurement using the sideline reference signal of the first time unit, to obtain a sideline RSRP, where the sideline RSRP does not perform layer 3 filtering.

It should be noted that, the measurement unit 1302 may be implemented by a processor, and the communication unit 1301 may be implemented by a communication interface.

Referring to fig. 14, fig. 14 is a data transmission apparatus provided in an embodiment of the present application, which is applied to a first terminal device in method embodiment 3, and the apparatus includes:

And the communication unit 1401 is configured to receive a sidelink RSRP sent by a second terminal device, where the first terminal device needs to perform power control according to a sidelink path loss and a downlink path loss, and when the second terminal device measures the sidelink RSRP, a layer 3 filter coefficient of the second terminal device is a fixed value, and the layer 3 filter coefficient is a fixed value, which indicates that no layer 3 filtering is performed.

In one implementation, the communication unit 1401 is further configured to send indication information to the second terminal device, where the indication information is used to indicate that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

In one implementation, in sending indication information to the second terminal device, the communication unit 1401 is specifically configured to:

Note that the communication unit 1401 may be implemented by a communication interface.

Referring to fig. 15, fig. 15 is a data transmission apparatus provided in an embodiment of the present application, which is applied to a second terminal device in method embodiment 3, and the apparatus includes:

a communication unit 1501, configured to send a side line RSRP to a first terminal device, where when the second terminal device measures the side line RSRP, a layer 3 filter coefficient of the second terminal device is a fixed value, and the layer 3 filter coefficient being the fixed value indicates that no layer 3 filtering is performed.

In one implementation, the apparatus further comprises:

a determining unit 1502 is configured to determine that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

In one implementation, in determining that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss, the determining unit 1502 is specifically configured to:

It should be noted that the determining unit 1502 may be implemented by a processor, and the communication unit 1501 may be implemented by a communication interface.

The embodiment of the application also provides a computer storage medium, wherein the computer storage medium stores a computer program for electronic data exchange, and the computer program causes a computer to execute any method described in the embodiment of the method, and the computer includes user equipment.

The embodiment of the application also provides a computer program product, wherein the computer program product comprises computer program instructions, and the computer program instructions enable a computer to execute any one of the methods described in the embodiment of the method. The computer program product may be a software installation package, said computer comprising user equipment.

The embodiment of the application also provides a chip, wherein the chip comprises computer program instructions, and the computer program instructions enable a computer to execute any one of the methods described in the embodiment of the method, and the computer comprises user equipment.

The embodiment of the application also provides a computer program, wherein the computer program causes a computer to execute any one of the methods described in the embodiment of the method, and the computer comprises user equipment.

It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described apparatus embodiments are merely illustrative, such as the above-described division of units, merely a division of logic functions, and there may be additional manners of dividing in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, or may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and components shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, the standby functional units in the embodiments of the present application may be integrated in one processing unit, or each unit 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.

The integrated units described above, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the above-mentioned method of the various embodiments of the present application. And the aforementioned memory includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.

Those of ordinary skill in the art will appreciate that all or a portion of the steps in the various methods of the above embodiments may be implemented by a program that instructs associated hardware, and the program may be stored in a computer readable memory, which may include: flash disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.

The foregoing has outlined rather broadly the more detailed description of embodiments of the application, wherein the principles and embodiments of the application are explained in detail using specific examples, the above examples being provided solely to facilitate the understanding of the method and core concepts of the application; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A data transmission method, applied to a first terminal device, the method comprising:

when the transmission power of the side transmission and the transmission power of the uplink transmission overlap on the first time unit, and the sum of the transmission power of the side transmission and the transmission power of the uplink transmission is greater than the maximum transmission power of the first terminal device and the priority of the uplink transmission is higher than the priority of the side transmission, the transmission power of the side transmission is reduced, and indication information is sent to the second terminal device, wherein the indication information is used for determining that the Reference Signal Receiving Power (RSRP) of the side reference signal of the first time unit is not used, or determining that the side RSRP obtained by the RSRP measurement of the side reference signal of the first time unit is not used for performing layer 3 filtering.

2. The method of claim 1, wherein the indication information is used to indicate at least one of: and the first terminal equipment changes the transmission power of the sidestream transmission performed on the first time unit and whether to use the sidestream reference signal of the first time unit to perform RSRP measurement.

3. The method according to claim 1 or 2, characterized in that the sum of the transmit power of the uplink transmission and the adjusted transmit power of the sidelink transmission is smaller than or equal to the maximum transmit power of the terminal device.

4. A data transmission method, applied to a second terminal device, the method comprising:

receiving indication information sent by a first terminal device, wherein the indication information is used for determining that Reference Signal Received Power (RSRP) measurement is not performed by using a sidestream reference signal of a first time unit, or determining that layer 3 filtering is not performed on a sidestream RSRP obtained by performing RSRP measurement by using the sidestream reference signal of the first time unit;

5. The method of claim 4, wherein the indication information is used to indicate at least one of:

6. A data transmission method, applied to a first terminal device, the method comprising:

and receiving the side Reference Signal Receiving Power (RSRP) sent by the second terminal equipment, wherein the first terminal equipment needs to perform power control according to the side downlink path loss and the downlink path loss, when the second terminal equipment measures the side reference signal RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

7. The method of claim 6, wherein the side transmissions and the uplink transmissions of the first terminal device share a carrier.

8. The method according to claim 6 or 7, characterized in that the method further comprises:

9. The method of claim 8, wherein the sending the indication information to the second terminal device comprises:

transmitting side uplink control information SCI to the second terminal equipment, wherein the SCI carries the indication information;

or, sending side line data to the second terminal equipment, wherein the indication information is carried in a Media Access Control (MAC) control unit (CE) of the side line data;

or sending direct communication interface PC 5-radio resource control RRC information to the second terminal equipment, wherein the PC5-RRC information carries the indication information.

10. A data transmission method, applied to a second terminal device, the method comprising:

11. The method of claim 10, wherein the side transmissions and the uplink transmissions of the first terminal device share a carrier.

12. The method according to claim 10 or 11, characterized in that the method further comprises:

13. The method of claim 12, wherein the determining that the first terminal device requires power control based on side and downlink path loss comprises:

14. The method of claim 13, wherein the indication information is sent by the first terminal device or is carried in configuration information sent by a network device, and the indication information is used for indicating that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

15. The method of claim 14, wherein the layer 3 filter coefficients are protocol defined, network device configured, or custom by the second terminal device.

16. A data transmission apparatus for use with a first terminal device, the apparatus comprising:

And the communication unit is used for sending indication information to the second terminal equipment, wherein the indication information is used for determining that Reference Signal Received Power (RSRP) measurement is not performed by using the sidestream reference signal of the first time unit, or determining that layer 3 filtering is not performed on the sidestream RSRP obtained by performing the RSRP measurement by using the sidestream reference signal of the first time unit.

17. The apparatus of claim 16, wherein the indication information is used to indicate at least one of:

18. The apparatus according to claim 16 or 17, wherein a sum of the transmit power of the uplink transmission and the adjusted transmit power of the sidelink transmission is less than or equal to a maximum transmit power of the terminal device.

19. A data transmission apparatus for use with a second terminal device, the apparatus comprising:

the communication unit is used for receiving indication information sent by the first terminal equipment, wherein the indication information is used for determining that Reference Signal Received Power (RSRP) measurement is not performed by using a sidestream reference signal of a first time unit, or determining that layer 3 filtering is not performed on a sidestream RSRP obtained by performing the RSRP measurement by using the sidestream reference signal of the first time unit;

20. The apparatus of claim 19, wherein the indication information is used to indicate at least one of:

21. A data transmission apparatus for use with a first terminal device, the apparatus comprising:

and the communication unit is used for receiving the lateral reference signal receiving power RSRP sent by the second terminal equipment, the first terminal equipment needs to perform power control according to the lateral link loss and the downlink loss, when the second terminal equipment measures the lateral RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

22. The apparatus of claim 21, wherein the side transmissions and the uplink transmissions of the first terminal device share a carrier.

23. The apparatus according to claim 21 or 22, wherein the communication unit is further configured to send indication information to the second terminal device, the indication information being configured to indicate that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

24. The apparatus according to claim 23, wherein the communication unit is configured to, in sending indication information to the second terminal device:

25. A data transmission apparatus for use with a second terminal device, the apparatus comprising:

and the communication unit is used for sending the lateral Reference Signal Received Power (RSRP) to the first terminal equipment, and when the second terminal equipment measures the lateral RSRP, the layer 3 filter coefficient of the second terminal equipment is a fixed value, and the layer 3 filter coefficient is a fixed value and indicates that the layer 3 filter is not performed.

26. The apparatus of claim 25, wherein the side transmissions and the uplink transmissions of the first terminal device share a carrier.

27. The apparatus according to claim 25 or 26, characterized in that the apparatus further comprises:

and the determining unit is used for determining that the first terminal equipment needs to perform power control according to the side downlink path loss and the downlink path loss.

28. The apparatus according to claim 27, wherein in determining that the first terminal device needs power control according to side and downlink path loss, the determining unit is specifically configured to:

29. The apparatus of claim 28, wherein the indication information is sent by the first terminal device or carried in configuration information sent by a network device, and the indication information is used to indicate that the first terminal device needs to perform power control according to a side downlink path loss and a downlink path loss.

30. The apparatus of claim 29, wherein the layer 3 filter coefficients are protocol defined, network device configured, or custom by the second terminal device.

31. A terminal device comprising a processor, a memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-15.

32. A computer-readable storage medium, characterized in that a computer program for electronic data exchange is stored, wherein the computer program causes a computer to perform the method according to any one of claims 1-15.