CN111148201B

CN111148201B - Data transmission method and device

Info

Publication number: CN111148201B
Application number: CN201811303563.2A
Authority: CN
Inventors: 黎超; 刘哲; 张兴炜
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-11-02
Filing date: 2018-11-02
Publication date: 2021-12-28
Anticipated expiration: 2038-11-02
Also published as: CN111148201A; WO2020087977A1

Abstract

The embodiment of the application provides a data transmission method and equipment. The data transmission method comprises the following steps: the first device determines the transmission power of the first device on the side link according to the side link power parameter, and the first device uses the transmission power of the first device to send data to the M second devices. In the data transmission method and device provided by the embodiment of the application, the first device determines the transmitting power of the first device on the side link according to the side link power parameter, and transmits data by using the transmitting power of the first device on the side link, so that the interference of the excessive transmitting power when the first device transmits data to the uplink data reception of the network device is avoided.

Description

Data transmission method and device

Technical Field

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

Background

In a communication system, in addition to communication between a network device (e.g., a base station) and a terminal device, communication between the terminal device and the terminal device is also included, which is called side link (Sidelink) communication. Data transmission in side link communication is not forwarded by network equipment, so that not only are wireless spectrum resources saved, but also the data transmission pressure of a core network is reduced, the occupation of communication system resources can be reduced, and the spectrum efficiency of a cellular communication system is improved.

The side link communication and the cellular link communication use different frequencies on the same carrier, and data transmitted by the terminal device on the side link can be transmitted on the carrier to which the cellular link belongs, so that out-of-band leakage of the transmission of the terminal device on the side link can interfere with uplink reception of the network device.

In order to control the transmission power of the terminal device on the side link to avoid that the signal transmitted on the side link interferes with the signal reception of the network device, in particular, in the unicast and multicast scenarios, how to determine a reasonable transmission power for the transmitter of the terminal device to avoid the influence of the transmission on the side link on the receiver of the network device is a problem to be solved.

Disclosure of Invention

The application provides a data transmission method and equipment, which solve the problem that the existing power control method only aims at the transmission of a broadcast form on a side link.

A first aspect of the present application provides a data transmission method, including:

the first equipment determines the transmitting power of the first equipment on the side link according to the side link power parameter; the sidelink power parameter includes at least one of: a first power parameter between a first device and a network device, a second power parameter between M second devices and the network device, and a configured transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1; the first device transmits data to the M second devices using the transmit power of the first device.

The first device determines the transmitting power of the first device on the side link according to the side link power parameter, and transmits data by adopting the transmitting power of the first device on the side link, so that the interference of overlarge transmitting power on the uplink data reception of the network device when the first device transmits the data is avoided.

In a feasible implementation manner, the first power parameter is a first path loss between the first device and the network device, or a first power obtained according to the first path loss; the second power parameter of one of the M second devices is a second path loss between the second device and the network device, or a second power obtained according to the second path loss.

In one possible implementation manner, the side link power parameter includes a first power parameter, the first power parameter is a first power, and the transmission power of the first device is not greater than the first power.

By controlling the transmission power of the first device to be not greater than the first power, interference of data transmission on the side link to uplink reception of the network device on the cellular link is mitigated.

In a possible implementation manner, the side link power parameter further includes M second power parameters, the second power parameter is a second power, and the transmission power of the first device is not greater than at least one of the first power parameter and the M second powers.

By controlling the transmission power of the first device not to be larger than the first power and the M second transmission powers, the interference of data transmission on the side link to uplink reception of the network device on the cellular link is further relieved.

In one possible implementation, the transmit power of the first device is the minimum of the first power and the M second powers.

In a feasible implementation manner, the side link power parameter includes a first power parameter, the first power parameter is a first path loss between the first device and the network device, and the transmission power of the first device is not greater than a first power obtained according to the first path loss.

In a feasible implementation manner, the side link power parameter further includes M second power parameters, the second power parameter of one of the M second devices is a second path loss between the second device and the network device, the transmission power of the first device is not greater than the first power obtained according to the first path loss, and the M second powers obtained according to the M second path losses.

In a feasible implementation manner, the open-loop power parameters of the first device and the M second devices are the same, the path loss compensation factors between the first device and the network devices and between the M second devices and the network devices are the same, and the transmission power of the first device is the transmission power obtained according to the minimum path loss of the first path loss and the M second path losses.

In one possible implementation, the first power is determined according to the open-loop power parameter, the first path loss, a path loss compensation factor of the first device and the network device, and a transmission bandwidth of the first device.

In a possible implementation manner, the determining, by the first device, the transmission power of the first device on the edge link according to the edge link power parameter includes:

the first device determines a configured transmit power value as a transmit power of the first device.

In one possible implementation, the configured transmission power values on the edge links between the first device and the M second devices are the same; the configured transmit power value is received through signaling or is preconfigured or predefined.

the first device takes the maximum value of the third power and the configured transmission power as the transmission power of the first device, and the third power is determined by the first device according to the path loss of the side links between the first device and the M second devices.

In a possible implementation manner, the determining, by the first device, the transmission power of the first device on the edge link according to the edge link power parameter further includes:

when the configured transmission power value is not larger than the first power, the first device determines the configured transmission power value as the transmission power of the first device.

In a possible implementation manner, the determining, by the first device, that the configured transmission power value is the transmission power of the first device includes:

the path loss of the side link of the first equipment is not greater than the first path loss between the first equipment and the network equipment, and the first equipment determines a configuration transmission power value as the transmission power of the first equipment;

the power control parameters comprise open loop power parameters and path loss compensation factors.

the configured transmission power value is not larger than the first power and the M second powers, and the first device determines the configured transmission power value as the transmission power of the first device.

In a possible implementation manner, the determining, by the first device, that the configured transmission power value is not greater than the first power and the M second powers, where the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, and the determining, by the first device, that the configured transmission power value is the transmission power of the first device includes:

the path loss of the side link of the first equipment is not larger than the first path loss between the first equipment and the network equipment and the second path loss between the M second equipment and the network equipment, and the first equipment determines a configuration transmission power value as the transmission power of the first equipment;

configuring a transmission power value larger than the first power, wherein the first device takes the first power or the third power as the transmission power of the first device on the side link; alternatively, the first and second electrodes may be,

the first device takes fourth power which is not more than the first power as the transmitting power of the first device; alternatively, the first and second electrodes may be,

the first device takes a fifth power which is not more than the first power and not less than the third power as the transmitting power of the first device;

and determining the third power according to a path loss compensation factor of the side links of the first device and the M second devices, the transmission bandwidth of the first device, the path loss of the side links of the first device and the M second devices, and an open-loop power parameter.

configuring a transmission power value larger than the first power or the M second powers, wherein the first device takes the minimum value of the first power and the M second powers, or the third power, as the transmission power of the first device on the side link; alternatively, the first and second electrodes may be,

the first device takes a sixth power which is not more than the first power and the M second powers as the transmission power of the first device; alternatively, the first and second electrodes may be,

the first device takes a seventh power which is not less than the third power and not more than the first power and the M second powers as a transmission power of the first device;

In one possible implementation, the transmit power of the first device is not less than the third power;

the third power is determined according to the path loss compensation factor of the edge links of the first device and the M second devices, the transmission bandwidth of the first device, the path loss of the edge links of the first device and the M second devices, and the open-loop power parameter.

In a possible implementation manner, before the first device determines the transmit power of the first device on the side link according to the side link power parameter, the data transmission method further includes:

the first device determines that at least one of the first rules is satisfied; the first rule includes:

the third power is not greater than the first power; or the like, or, alternatively,

the third power is not greater than the second power;

the third power is determined by the first device according to the path loss of the edge link between the first device and the M second devices.

In a possible implementation manner, before the first device determines the transmit power of the first device on the edge link according to the edge link power parameter, the method for data transmission further includes:

the first device determines that at least one of the second rules is satisfied; the second rule includes:

the path loss of the side links of the first equipment and the M second equipment is not more than the first path loss between the first equipment and the network equipment; or the like, or, alternatively,

the path loss of the side links of the first device and the M second devices is not more than the second path loss between the M second devices and the network device.

the first equipment receives indication information of a second power parameter of each second equipment, which is sent by M second equipments; alternatively, the first and second electrodes may be,

and the first equipment receives the indication information of the second power parameters of the M second equipment sent by the network equipment.

In a possible implementation manner, the data transmission method further includes:

the first device sends indication information of the first power parameter to the M second devices and/or the network device.

and the first device sends indication information of the third power to the M second devices and/or the network device.

the first device sends the indication information of the path loss of the side links of the first device and the M second devices to the M second devices and/or the network device.

the first device sends a first power headroom report to M second devices and/or network devices;

the first power headroom report carries indication information of a first power parameter, and the first power headroom report is generated by taking first power of the first device as transmission power of the first device.

the first device receives M second power headroom reports sent by the M second devices respectively, or the first device receives the second power headroom reports of the M second devices sent by the network device;

the second power headroom report of any second device carries indication information of a second power parameter of the second device, and the second power headroom report is generated by taking second power of the second device as transmission power of the second device.

the first device sends a third power headroom report to the network device;

and the third power headroom report carries indication information of third power, and the third power headroom report is generated by taking the third power of the first equipment on the side link as the transmission power of the first equipment.

In one possible implementation, the transmit power of the first device is not greater than a preset maximum transmit power of the first device.

In one possible implementation, the preset maximum transmit power includes at least one of:

a maximum available transmit power of the first device; or the like, or, alternatively,

a maximum transmit power allowed by the first device; or the like, or, alternatively,

the maximum transmission power or the maximum available transmission power of the first device on all carriers on the current subframe; or the like, or, alternatively,

a maximum transmit power or a maximum available transmit power of the first device on a current carrier on a current subframe; or the like, or, alternatively,

the network equipment is the maximum transmitting power configured on the current control/data channel of the first equipment; or the like, or, alternatively,

the network device configures a maximum transmit power for the first device.

In one possible implementation, a method for a first device to transmit data to M second devices using transmit power of the first device includes:

m is 1, the first device sends data to M second devices by using the transmitting power of the first device in a unicast mode; or the like, or, alternatively,

m is larger than 1, the first device transmits data to M second devices by using the transmission power of the first device in a multicast or broadcast mode.

In one possible implementation, there are at least two transmissions sent by the first device to the M second devices via the side link at the same time, where the transmission manner of the side link includes at least two of the following: unicast, multicast and broadcast, at least two transmissions being transmitted in the same or different manner.

In one possible implementation manner, before the first device sends data to the M second devices using the transmission power of the first device, the data transmission method further includes:

the first device determines that a sum of transmit powers at the transmissions is not greater than an eighth power of the first device, the eighth power being any one of:

the method comprises the steps of configuring a transmission power value, a first power, a second power or a preset maximum transmission power between a first device and M second devices.

In a possible implementation manner, before the sum of the transmission powers of the first device under each transmission is greater than the eighth power of the first device, and the first device uses the transmission power of the first device to send data to the M second devices, the data transmission method further includes:

the first equipment adjusts the transmitting power of the first equipment under each transmission according to the priority of each transmission and the side link power parameter; alternatively, the first and second electrodes may be,

the first equipment determines transmission with the transmission power of 0 and transmission power corresponding to the transmission with the transmission power of not 0 according to the sequence of the priority of each transmission from low to high, and discards the transmission with the transmission power of 0; alternatively, the first and second electrodes may be,

the first equipment distributes the second power to various transmissions according to a preset proportion, and determines the transmitting power of the first equipment under each transmission; alternatively, the first and second electrodes may be,

the first equipment determines the transmitting power of the first equipment under each transmission according to the congestion level of a channel corresponding to each transmission and the side link power parameter; alternatively, the first and second electrodes may be,

the first device determines a power configuration/dropping order of each transmission according to a predefined rule, and the first device determines the transmission power of the dropped transmission and the transmission power of the transmission which is not dropped according to the power configuration/dropping order of each transmission; alternatively, the first and second electrodes may be,

the first device determines a transmission order for each transmission according to a predefined rule, and the first device determines a transmit power of the first device at each transmission according to the transmission order for each transmission.

In a possible implementation manner, the first device uses the transmission power of the first device to transmit data to the M second devices on the carrier where the cellular link is located, where the cellular link is a link where the terminal device communicates with the network device.

The terminal number is the first equipment or M second equipments.

A second aspect of the present application provides a data transmission device, configured to execute the data transmission method of the first aspect, and has the same technical effects.

A data transmission device provided in a second aspect of the present application, as a first device, includes:

the acquisition module is used for determining the transmitting power of the first equipment on the side link according to the side link power parameter; the sidelink power parameter includes at least one of: a first power parameter between a first device and a network device, a second power parameter between M second devices and the network device, and a configured transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1;

and the sending module is used for sending data to the M second devices by using the transmitting power of the first device.

In a feasible implementation manner, the side link power parameter includes a configured transmission power value between the first device and the M second devices, and the obtaining module is specifically configured to determine the configured transmission power value as the transmission power of the first device.

In a feasible implementation manner, the edge link power parameter includes a configured transmission power value between the first device and the M second devices, and the obtaining module is specifically configured to use a maximum value of the third power and the configured transmission power as the transmission power of the first device, where the third power is a power determined by the first device according to a path loss of the edge link between the first device and the M second devices.

In a feasible implementation manner, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module is specifically configured to determine the configured transmission power value as the transmission power of the first device;

wherein the configured transmit power value is not greater than the first power.

In a feasible implementation manner, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the configured transmission power value is not greater than the first power, and the obtaining module is specifically configured to determine the configured transmission power value as the transmission power of the first device;

the path loss of the side link of the first device is not larger than the first path loss between the first device and the network device, and the power control parameter comprises an open-loop power parameter and a path loss compensation factor.

In a feasible implementation manner, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module is specifically configured to determine the configured transmission power value as the transmission power of the first device, where the configured transmission power value is not greater than the first power and the M second powers.

In a feasible implementation manner, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, the configured transmission power value is not greater than the first power and the M second powers, and the obtaining module is specifically configured to determine the configured transmission power value as the transmission power of the first device;

the path loss of the side link of the first device is not greater than a first path loss between the first device and the network device, and a second path loss between the M second devices and the network device, and the power control parameter includes an open-loop power parameter and a path loss compensation factor.

In a possible implementation manner, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module is specifically configured to,

taking the first power or the third power as the transmitting power of the first equipment on the side link; alternatively, the first and second electrodes may be,

taking a fourth power not greater than the first power as the transmission power of the first device; alternatively, the first and second electrodes may be,

taking fifth power which is not more than the first power and not less than the third power as the transmitting power of the first device;

the configured transmission power value is greater than the first power, and the third power is determined according to a path loss compensation factor of edge links between the first device and the M second devices, a transmission bandwidth of the first device, path losses of edge links between the first device and the M second devices, and an open-loop power parameter.

taking the minimum value of the first power and the M second powers, or the third power, as the transmitting power of the first device on the side link; alternatively, the first and second electrodes may be,

taking a sixth power not greater than the first power and the M second powers as a transmission power of the first device; alternatively, the first and second electrodes may be,

taking seventh power which is not less than the third power and not more than the first power and the M second powers as the transmission power of the first device;

the configured transmission power value is greater than the first power or the M second powers, and the third power is determined according to a path loss compensation factor of edge links between the first device and the M second devices, a transmission bandwidth of the first device, path losses of edge links between the first device and the M second devices, and an open-loop power parameter.

In one possible implementation, the data transmission device further includes:

a detection module to determine that at least one of the first rules is satisfied; the first rule includes:

the third power is not greater than the second power;

In a possible implementation, the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the detection module is further configured to,

determining that at least one of the second rules is satisfied; the second rule includes:

In one possible implementation, the data transmission device further includes:

the receiving module is used for receiving indication information of a second power parameter of each second device, which is sent by the M second devices; alternatively, the first and second electrodes may be,

and receiving indication information of the second power parameters of the M second devices, which is sent by the network device.

In a possible implementation manner, the sending module is further configured to send the indication information of the first power parameter to M second devices and/or network devices.

In a possible implementation manner, the sending module is further configured to send information indicating the third power to the M second devices and/or the network device.

In a possible implementation manner, the sending module is further configured to send, to the M second devices and/or the network device, indication information of path loss of the side links between the first device and the M second devices.

In a possible implementation manner, the sending module is further configured to send the first power headroom report to M second devices and/or network devices;

In a possible implementation manner, the receiving module is further configured to receive M second power headroom reports sent by the M second devices, respectively, or the first device receives the second power headroom reports of the M second devices sent by the network device;

In a possible implementation manner, the sending module is further configured to send a third power headroom report to the network device;

the network device configures a maximum transmit power for the first device.

In a possible implementation manner, the sending module is specifically configured to send, in a unicast manner, data to M second devices by using the transmission power of the first device, where M is 1; or the like, or, alternatively,

and transmitting data to M second devices by using the transmitting power of the first device in a multicast or broadcast mode, wherein M is larger than 1.

In one possible implementation, the detection module is further configured to determine that a sum of transmit powers at the transmissions is not greater than an eighth power of the first device, the eighth power being any one of:

In a possible implementation manner, the sum of the transmission powers of the first device under each transmission is greater than the eighth power of the first device, and the data transmission device further includes an adjusting module for adjusting the transmission power of the first device under each transmission

Adjusting the transmitting power of the first equipment under each transmission according to the priority and the side link power parameter of each transmission; alternatively, the first and second electrodes may be,

determining transmission with the transmission power of 0 and transmission power corresponding to transmission with the transmission power of not 0 according to the sequence of the priority of each transmission from low to high, and discarding the transmission with the transmission power of 0 by the first equipment; alternatively, the first and second electrodes may be,

distributing the second power to various transmissions according to a preset proportion, and determining the transmitting power of the first equipment under each transmission; alternatively, the first and second electrodes may be,

determining the transmitting power of the first equipment under each transmission according to the congestion level of a channel corresponding to each transmission and the side link power parameter; alternatively, the first and second electrodes may be,

determining a power configuration/dropping order of each transmission according to a predefined rule, and determining the transmitting power of dropped transmissions and non-dropped transmissions by the first device according to the power configuration/dropping order of each transmission; alternatively, the first and second electrodes may be,

the transmission order of the transmissions is determined according to a predefined rule, and the first device determines the transmission power of the first device at each transmission according to the transmission order of each transmission.

In a possible implementation manner, the sending module is specifically configured to send data to the M second devices on a carrier where a cellular link is located by using the transmission power of the first device, where the cellular link is a link where the terminal device communicates with the network device.

A third aspect of the present application provides an output transmission apparatus for performing the data transmission method of the first aspect described above, with the same technical effects.

A data transmission device provided in a third aspect of the present application, as a first device, includes:

the processor is used for determining the transmitting power of the first equipment on the side link according to the side link power parameter; the sidelink power parameter includes at least one of: a first power parameter between a first device and a network device, a second power parameter between M second devices and the network device, and a configured transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1;

a transmitter for transmitting data to the M second devices using the transmission power of the first device.

In a possible implementation manner, the side link power parameter includes a configured transmission power value between the first device and the M second devices, and the processor is specifically configured to determine the configured transmission power value as the transmission power of the first device.

In a possible implementation manner, the edge link power parameter includes a configured transmission power value between the first device and the M second devices, and the processor is specifically configured to use a maximum value of the third power and the configured transmission power as the transmission power of the first device, where the third power is a power determined by the first device according to a path loss of an edge link between the first device and the M second devices.

In a possible implementation manner, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor is specifically configured to determine the configured transmission power value as the transmission power of the first device;

In a possible implementation manner, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the configured transmission power value is not greater than the first power, and the processor is specifically configured to determine the configured transmission power value as the transmission power of the first device;

In a possible implementation manner, the sidelink power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor is specifically configured to determine the configured transmission power value as the transmission power of the first device, where the configured transmission power value is not greater than the first power and the M second powers.

In a possible implementation manner, the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, the configured transmission power value is not greater than the first power and the M second powers, and the processor is specifically configured to determine the configured transmission power value as the transmission power of the first device;

In a possible implementation manner, the sidelink power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor is specifically configured to,

In one possible implementation, the data transmission device further includes:

the third power is not greater than the second power;

In one possible implementation, the data transmission device further includes:

the receiver is used for receiving the indication information of the second power parameter of each second device, which is sent by the M second devices; alternatively, the first and second electrodes may be,

In a possible implementation, the transmitter is further configured to transmit an indication of the first power parameter to the M second devices and/or the network device.

In a possible implementation, the transmitter is further configured to transmit information indicating the third power to the M second devices and/or the network device.

In a possible implementation manner, the transmitter is further configured to transmit, to the M second devices and/or the network device, information indicating a path loss of the side link between the first device and the M second devices.

In a possible implementation, the transmitter is further configured to transmit the first power headroom report to M second devices and/or network devices;

In a possible implementation manner, the receiver is further configured to receive M second power headroom reports sent by the M second devices, respectively, or the first device receives the M second power headroom reports sent by the network device;

In a possible implementation, the transmitter is further configured to transmit a third power headroom report to the network device;

the network device configures a maximum transmit power for the first device.

In a possible implementation, the transmitter is specifically configured to transmit, in unicast, data to M second devices using the transmission power of the first device, where M is 1; or the like, or, alternatively,

In one possible implementation, the processor is further configured to determine that a sum of transmit powers at the transmissions is not greater than an eighth power of the first device, the eighth power being any one of:

In one possible implementation, the sum of the transmit power of the first device at each transmission is greater than the eighth power of the first device, the processor is further configured to,

In a possible implementation, the transmitter is specifically configured to transmit data to the M second devices on a carrier where a cellular link is located using the transmission power of the first device, where the cellular link is a link where the terminal device communicates with the network device.

A fourth aspect of the present application provides an electronic device, comprising: a processor, memory and computer program;

a computer program is stored in the memory, and the processor executes the computer program to perform the data transmission method in any of the possible implementations of the first aspect described above.

A fifth aspect of the present application provides a computer storage medium, which includes a computer program for implementing the data transmission method in any one of the possible implementations of the first aspect.

A sixth aspect of the present application provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the data transmission method as in any one of the possible implementations of the first aspect described above.

A seventh aspect of the present application provides a chip, which includes a memory and a processor, where the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that an electronic device in which the chip is installed executes a data transmission method in any feasible implementation manner of the first aspect.

The present application may be further combined to provide further implementations on the basis of the implementations provided by the above-mentioned aspects.

Drawings

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

fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application;

fig. 3 is a first flowchart illustrating a data transmission method according to an embodiment of the present application;

fig. 4a is a schematic diagram of a first device transmitting in a time division multiplexing mode;

fig. 4b is a schematic diagram of the first device transmitting in the frequency division multiplexing mode;

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

fig. 6 is a schematic structural diagram of a data transmission device according to a second embodiment of the present application;

fig. 7 is a schematic structural diagram of a data transmission device according to a third embodiment of the present application.

Detailed Description

Fig. 1 is a first schematic architecture diagram of a communication system according to an embodiment of the present application. As shown in fig. 1, the communication system may include: a network device and at least one terminal device. In the communication system provided by the embodiment of the present application, in addition to the communication between the network device and the terminal device, the communication between the terminal device and the terminal device is also included.

The communication link between the terminal Device and the terminal Device may be a Device-to-Device (D2D) link or an edge link. In the internet of vehicles, the communication link between the terminal devices may also be a vehicle-to-vehicle (V2V) link, a vehicle-to-Pedestrian (V2P) link, a vehicle-to-Infrastructure (V2I) link, or a vehicle-to-X (V2X) link. In the following embodiments of the present application, the side link/first link is mainly used to describe communication transmission between the terminal device and the network device, and the cellular link/second link is used to describe communication transmission between the network device and the terminal device. The side link may perform at least one of unicast, multicast, and broadcast communication between the terminal devices.

The terminal device may be a wireless terminal, which may be a device providing voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem, or may be a wired terminal. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, Road Side Units (RSUs), may communicate with one or more core networks via a Radio Access Network (RAN). Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). The wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and an On Board Unit (OBU), which is not limited herein.

The network device is a device for accessing the terminal device to the wireless network, and may be a Base Transceiver Station (BTS) in a Global System for Mobile Communication (GSM), a Base Station (Node B) in a Universal Mobile Telecommunications System (UMTS), an evolved Base Station (eNB or eNodeB) in Long Term Evolution (Long Term Evolution, LTE), or a relay Station or an access point, or a Base Station in a future fifth Generation Mobile Communication (5G) network, or a relay Station, an access point, a vehicle-mounted device, a wearable device, and the like operating in a high frequency band, which is not limited herein.

Fig. 1 exemplarily shows an edge link between a device 1 and a device 2 when the device 1 and the device 2 perform unicast communication. The terminal device in fig. 1 is illustrated by taking a vehicle device 1 and a vehicle device 2 as an example. Optionally, the device 1 and the device 2 may be located under the same network device, or may be located under different network devices, which is not limited in this application.

Fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present application. As shown in fig. 2, the communication system includes a plurality of terminal devices, and fig. 2 exemplarily shows edge links between the device 1 and other devices when the device 1 performs multicast or broadcast to the devices 2, 3, and 4. Illustratively, the devices 2, 3, 4 may also multicast or broadcast to other end devices. Illustratively, a terminal device has a direct connection with a network device, and a terminal device also has a connection with a remote UE is called Relay UE. The Relay UE may directly communicate with the network device, may transfer data of mutual communication between the remote UE and the network device, and may only communicate with the remote UE. The Remote UE and the Relay UE are directly connected, and an optional direct connection exists between the Remote UE and the network device, and the Remote UE may directly communicate with the Relay UE or communicate with the network device through the Relay UE.

For example, when the sidelink of the present application is applied to the internet of vehicles, the communication system may further include at least one road side unit RSU, and the RSU may communicate with each vehicle-mounted device (terminal device) and/or network device. Each network device in the communication system can communicate with each vehicle-mounted device and/or RSU. The communication System may further include at least one Global Navigation Satellite System (GNSS), and the GNSS may provide positioning related information for the vehicle-mounted device, the roadside unit, and the network device. The RSU may functionally implement both the functions of the vehicle-mounted device and the functions of the network device. Any device in the internet of vehicles can use the frequency spectrum of the cellular link when in communication, and can also use the intelligent traffic frequency spectrum near 5.9 GHz.

For example, the data transmission method provided by the present application may also be applied to a link between network devices, and each network device in the communication system may be a macro station or a small station. There may also be both macro and small stations in the communication system. The network device in the communication system may be a base station where the primary carrier is located or a base station where the secondary carrier is located, which is not limited in this application.

In the communication system, the side link and the cellular link use different frequencies on the same carrier for communication, and although the time-frequency resource used by the terminal device for data transmission on the side link and the time-frequency resource used for communication on the cellular link have different frequency resources, the data transmitted by the terminal device on the side link can be transmitted on the carrier to which the cellular link belongs, so that the out-of-band leakage of the transmission of the terminal device on the side link can interfere with the uplink reception of the network device. It is therefore desirable to control the transmit power of the terminal device on the side link to avoid interference with the reception of signals by the network device from signals transmitted on the side link.

To solve the above problems, at least one data transmission method and apparatus are provided in the following embodiments. The following describes in detail the data transmission method and apparatus provided in the present application with specific embodiments. In the following detailed description, the same or similar concepts or processes may not be repeated in some embodiments.

One aspect of the present application provides a data transmission method. Fig. 3 is a first flowchart of a data transmission method according to an embodiment of the present application. In the data transmission method provided in this embodiment, the first device determines the transmit power of the first device on the side link according to the side link power parameter, so as to avoid interference of the transmit power of the first device on uplink reception of the network device. The data transmission method provided by the present embodiment may be applied to the communication system shown in fig. 1 and fig. 2, and the executing subject in the present embodiment may be a terminal device in the communication system, and may be, for example, a vehicle in fig. 1 and fig. 2. As shown in fig. 3, the data transmission method includes:

s101, the first equipment determines the transmitting power of the first equipment on the side link according to the side link power parameter.

Wherein the side link power parameter comprises at least one of: the method comprises the steps of obtaining a first power parameter between a first device and a network device, obtaining a second power parameter between M second devices and the network device, and obtaining a configuration transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1. The configured transmission power value may be configured by the network device, may also be preconfigured, and may also be predefined by the protocol, which is not limited in this application. For example, when a first device sends data to M second devices on a side link, in order to ensure that each second device can receive the data sent by the first device, the larger the transmission power of the first device is, the better the transmission power is. However, if the transmit power of the first device is too high, uplink data reception to the network device may be interfered with. In order to solve the problem, in this embodiment, the transmit power of the first device on the side link may be determined according to the side link power parameter, so as to avoid that the transmit power of the first device is too large.

Optionally, the first device sends data to M second devices on the side link, and when M is 1, the data may be sent in a unicast manner; when M >1, it can be sent in multicast mode; it is also possible that M is an indefinite number of second devices, which may then transmit in a broadcast fashion. As long as data is sent out to the first device, under the broadcast mechanism, it is not mandatory that specific M second devices receive the data sent by the first device.

Illustratively, the sidelink power parameter may be: any one or combination of any more of a first power parameter between the first device and the network device, a second power parameter between the M second devices and the network device, and a configured transmission power value between the first device and the M second devices. When M is larger than 1, each second device corresponds to one second power parameter, and the network device configures one configured transmitting power value for the first device and each second device.

For example, the first device may determine the transmit power of the first device according to the first power parameter, may further control the transmit power of the first device according to the first power parameter and the p second power parameters, and may further control the transmit power of the first device according to the first power parameter and the configured transmit power value. Wherein p is an integer greater than 0 and not greater than M.

Optionally, the first power parameter is a first path loss between the first device and the network device, or a first power obtained according to the first path loss.

For example, the first power may be a maximum transmit power of the first device on the side link allowed by the network device. When the transmission power of the first device on the side link is greater than the first power, the interference of the transmission power of the first device on the uplink data reception of the network device will exceed the acceptance range of the network device. That is, the first power may be considered as an upper limit value of the first device transmission power, i.e. the value of the transmission power of the edge link determined by the first device cannot exceed this value.

For example, the first path loss may be a path loss measured by the first device within a preset time range. Optionally, the first device updates the first path loss according to a preset period, or when detecting that the displacement is greater than a preset or configured displacement.

Optionally, the second power parameter of one of the M second devices is a second path loss between the second device and the network device, or a second power obtained according to the second path loss.

For example, the second power may be a maximum transmit power of the second device on the side link allowed by the network device. When the transmission power of the second device on the side link is greater than the second power, the interference of the transmission power of the second device on the uplink data reception of the network device will exceed the acceptance range of the network device. That is, the second power can be regarded as an upper limit value of the transmission power of the second device, i.e. the transmission power value of the edge link determined by the second device cannot exceed this value.

For example, the second path loss may be a path loss measured by the second device within a preset time range. Optionally, the second device updates the second path loss according to a preset period, or when detecting that the displacement is greater than a preset or configured displacement.

It is to be understood that, when the first power parameter is the first power, the second power parameter may be the second power, and may also be a second path loss between the second device and the network device. Similarly, when the first power parameter is a first path loss between the first device and the network device, the second power parameter may be the second power, and may also be a second path loss between the second device and the network device.

Optionally, before determining the transmission power of the first device in S101, the data transmission method further includes:

s100, the first device receives indication information of second power parameters of the M second devices.

For example, the manner in which the first device receives the indication information of the second power parameters of the M second devices may be that the first device receives the indication information of the second power parameters of each of the M second devices, which is sent by the M second devices; or, the first device receives indication information of the second power parameters of the M second devices sent by the network device.

Optionally, the indication information of the second power parameter needs to be carried in the power headroom report for transmission. For example, the first device receives M second power headroom reports sent by the M second devices, or the first device receives the M second power headroom reports sent by the network device; the second power headroom report of any one of the second devices carries indication information of a second power parameter of the second device.

Illustratively, the power headroom report is the difference of the preset maximum transmit power minus the transmit power.

Illustratively, the second power headroom report is generated by taking a second power of the second device as a transmit power of the second device. For example, the second PHR2 is Pmax-P2, Pmax is the maximum transmit power or allowed maximum transmit power, and P2 is the second power.

S102, the first equipment uses the transmitting power of the first equipment to send data to the M second equipment.

It is understood that when M is 1, the communication transmission between the first device and the second device is in a unicast form, and the first device transmits data to the second device in the unicast form by using the transmission power of the first device.

Illustratively, when M is greater than 1, referring to fig. 2, a first device transmits data to a plurality of second devices, and at this time, the first device transmits data to the M second devices using the transmission power of the first device in a multicast or broadcast manner.

The data transmission method provided by the embodiment comprises the following steps: the first device determines the transmission power of the first device on the side link according to the side link power parameter, and the first device uses the transmission power of the first device to send data to the M second devices. In this embodiment, the first device determines the transmit power of the first device on the side link according to the side link power parameter, and transmits data by using the transmit power of the first device on the side link, thereby avoiding interference of excessive transmit power when the first device transmits data to uplink data reception of the network device.

For example, the following describes the determination of the transmission power of the first device in detail with reference to the specific content included in the sidelink power parameter.

For example, when the allowed maximum power information is included in the sidelink power parameter, determining the transmission power of the first device may specifically include the following cases:

the first possible scenario:

the side link power parameter includes a first power parameter, where the first power parameter is a first power, and at this time, the transmission power of the first device is not greater than the first power.

The second possible scenario:

the side link power parameter further includes M second power parameters, the second power parameter of one of the M second devices is a second power, and at this time, the transmission power of the first device is not greater than the first power parameter and the M second transmission powers.

Optionally, the transmission power of the first device may be the minimum of the first power and the M second powers.

It can be understood that when M is 1 and the first device performs unicast on the side link, the smaller of the first power and the second power is selected as the transmission power of the first device.

Optionally, the transmission power of the first device may also be a power value smaller than the first power and the M second powers.

For example, when the side link power parameter includes the path loss information, determining the transmission power of the first device may specifically include the following cases:

the first possible scenario:

the side link power parameter includes a first power parameter, the first power parameter is a first path loss between the first device and the network device, and at this time, the transmission power of the first device is not greater than a first power obtained according to the first path loss.

For example, in each embodiment of the present application, the obtaining manner of the first power may specifically be:

the first power is determined according to the open-loop power parameter, the first path loss, the path loss compensation factor of the first device and the network device, and the transmission bandwidth of the first device. Alternatively, the transmission bandwidth may be the actual transmission bandwidth or an intermediate value for determining the transmission power. Optionally, the bandwidth is a bandwidth when the transmission is made on the side link.

Illustratively, the first path loss is a loss caused by a factor of a transmission medium in a data transmission process between the first device and the network device, and the first path loss is affected by a distance between the first device and the network device. The path loss compensation factor is used to compensate for the path loss during transmission.

Alternatively, the open loop power parameter P0, just a name, is actually an initial value of a power used to determine the uplink transmit power on the cellular link, and is a terminal device specific parameter. In the present application, P0 may be terminal device specific, or terminal device group specific. This parameter, as used in this application, may also be used to determine the first power value. The first power value is a value used by the network device to control uplink interference caused by transmission on the sidelink on the shared carrier. Alternatively, the network device may implement the control of the first power by configuring the open-loop power parameter P0 and the loss compensation factor alpha.

Optionally, the path loss compensation factor is a parameter for compensating for the path loss during the transmission process, and when determining the power, the path loss compensation factor is directly multiplied or added with the path loss to compensate the corresponding path loss value by the corresponding factor. The path loss ranges from 0 to 1.

Optionally, the first power P1 is specifically calculated according to the open-loop power parameter P0_1, the first path loss L1, the path loss compensation factor alpha _1 of the first device and the network device, and the transmission bandwidth M1 of the first device by using the following formula 1:

p1 ═ P0_1+ alpha _1xL1+10log10(M1) formula 1

The second possible scenario:

the side link power parameters further include M second power parameters, the second power parameter of one of the M second devices is a second path loss between the second device and the network device, and at this time, the transmission power of the first device is not greater than the first power obtained according to the first path loss, and the M second powers obtained according to the M second path losses.

For example, similar to the calculation of the first power, the calculation of the second power of any second device may specifically be:

the second power is determined according to the open-loop power parameter, the second path loss, the path loss compensation factor of the second device and the network device, and the transmission bandwidth of the second device.

Illustratively, the second path loss is a loss caused by a factor of a transmission medium in a data transmission process between the second device and the network device, and the second path loss is affected by a distance between the second device and the network device.

Optionally, the second power P2 is specifically calculated according to the open-loop power parameter P0_2, the second path loss L2, the path loss compensation factor alpha _2 of the second device and the network device, and the transmission bandwidth M2 of the second device by using the following formula 2:

p2 ═ P0_2+ alpha _2xL2+10log10(M2) formula 2

Optionally, referring to the above calculation formulas 1 and 2 of the transmission power, the transmission power of the first device is not greater than the first power obtained according to the first path loss, and the M second powers obtained according to the M second path losses, that is, the transmission power of the first device is not greater than P1 and M P2.

Illustratively, in the case that the open-loop power parameter P0 is the same for the first device and the M second devices, and the path loss compensation factors alpha between the first device and the M second devices and the network device are the same, the transmission power P of the first device is not greater than P1 and M P2, which can be equivalent to P ≦ P0+ alphaxmin { L1, L2_1, L2_2, … …, L2_ M } +10log10 (M1). Where min { L1, L2_1, L2_2, … …, L2_ M } represents taking the minimum value of all path losses, and L2_ i represents the second path loss of the ith second device among the M second devices.

It is understood that, for the second device, the transmission power P of the second device should also satisfy not more than P1 and M P2, which can be equivalent to P0+ alphaxmin { L1, L2_1, L2_2, … …, L2_ M } +10log10 (M2).

Illustratively, when the open-loop power parameter P0 is different between the first device and the M second devices, and the path loss compensation factors alpha are different between the first device and the M second devices and the network device, respectively, the transmission power P of the first device is ≦ P0_1+ alpha _1xmin { L1, L2_1, L2_2, … …, L2_ M } +10log10(M1), and the transmission power P of the second device is ≦ P0_2+ alpha _2xmin { L1, L2_1, L2_2, … …, L2_ M } +10log10 (M2).

For example, the transmission power of the first device may be a transmission power obtained according to a minimum path loss of the first path loss and the M second path losses.

Optionally, the transmission power of the first device may also be transmission power obtained according to a third path loss, where the third path loss is a path loss value smaller than the first path loss and the M second path losses.

It can be understood that, when M is 1, the transmission power of the first device is obtained by using the smaller value of the first path loss and the second path loss.

When the side link power parameter includes the configured transmission power value, determining the transmission power of the first device may specifically be:

if the side link power parameter includes a configured transmission power value between the first device and the M second devices, the first device determines, according to the side link power parameter, a transmission power of the first device on the side link, including:

Illustratively, the configured transmission power values obtained between the first device and the M second devices are the same; wherein the configured transmit power value is configured or preconfigured or predefined by the signaling. Illustratively, when M is 1, the transmission power value is configured as a parameter common to a pair of the first device and the second device which are unicast. Illustratively, when M >1, the transmission power value is configured as a common parameter configured to a group of multicast or broadcast first devices and M second devices.

For example, the first device may use the maximum of the third power between the first device and the M second devices and the configured transmission power as the transmission power of the first device. And the third power is determined by the first device according to the path loss of the side links between the first device and the M second devices.

Further, when the side link power parameter includes the configured transmission power value, the side link power parameter may further include a first power parameter and/or a second power parameter.

Optionally, if the side link power parameter further includes a first power parameter, where the first power parameter is a first power, the determining, by the first device, the transmission power of the first device on the side link according to the side link power parameter includes:

Illustratively, comparing the configured transmission power value configured for the first device by the network device with the first power, and when the configured transmission power value is not greater than the first power, using the configured transmission power value as the transmission power of the first device can avoid the transmission power of the first device from being too large.

Optionally, when the configured transmission power value is greater than the first power, the first device uses the first power or the third power as the transmission power of the first device on the side link; alternatively, the first and second electrodes may be,

the first device regards a fifth transmission power, which is not less than the third power and not more than the first power, as the transmission power of the first device.

For example, when the configured transmission power is greater than the first power, if the first device uses the configured transmission power as the transmission power of the first device, interference may be generated on uplink data reception of the network device. Thus, the first power or the third power may be taken as the transmit power of the first device.

Illustratively, the third power is determined according to a path loss compensation factor of the edge links of the first device and the M second devices, a transmission bandwidth of the first device, path losses of the edge links of the first device and the M second devices, and an open loop power parameter. For example, the third power may be calculated according to equation 1.

Illustratively, the specific calculation manner of the configured transmission power value can also refer to equation 1. Therefore, the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, the configured transmission power value is not greater than the first power, and the first device determines that the configured transmission power value is the transmission power of the first device, which may be equivalent to:

when the path loss of the side link of the first device is not larger than the first path loss between the first device and the network device, the first device determines a configuration transmission power value as the transmission power of the first device;

Optionally, if the side link power parameter further includes a first power parameter and M second power parameters, where the first power parameter is first power, and the second power parameter is second power, the first device determines, according to the side link power parameter, a transmission power of the first device on the side link, including:

when the configured transmission power value is not greater than the first power and the M second powers, the first device determines the configured transmission power value as the transmission power of the first device.

Illustratively, by comparing the configured transmission power value configured for the first device by the network device with the first power and the M second powers, when the configured transmission power value is not greater than the first power and the M second powers, the configured transmission power value is used as the transmission power of the first device, so that the transmission power of the first device can be prevented from being too large.

Optionally, when the configured transmission power value is greater than the first power or the M second powers, the first device uses a minimum value of the first power and the M second powers, or a third power, as the transmission power of the first device on the side link; alternatively, the first and second electrodes may be,

the first device regards, as the transmission power of the first device, a seventh power that is not less than the third power and not more than the first power and the M second powers.

For example, when the side link power parameter includes, in addition to the configured transmission power parameter, a first path loss between the first device and the network device and a second path loss between the M second devices and the network device, the first power of the first device and the second power of the M second devices may be first obtained according to the path loss information. Further, when the configured transmission power value is not greater than the first power when the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, the first device determines that the configured transmission power value is the transmission power of the first device, which may be equivalently:

and when the path loss of the side link of the first device is not greater than the first path loss between the first device and the network device and the second path loss between the M second devices and the network device, the first device determines the configuration transmission power value as the transmission power of the first device.

On the basis of any one of the above embodiments, the present application further provides a data transmission method. In this embodiment, considering that when the transmission power of the first device is too low, which may cause data transmission failure on the side link, the generated transmission power of the first device needs to be not less than the third power.

For example, the first device may first determine that the first device determines that at least one of the first rules is satisfied before determining the transmit power of the first device on the side link based on the side link power parameter.

Wherein the first rule comprises: the third power is not greater than the first power, or the third power is not greater than the second power.

When detecting that the first device does not satisfy any of the first rules, it may be determined that the transmit power of the first device determined from the side link power parameter may not be able to communicate normally on the side link while mitigating interference requirements for the network device.

For example, when the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, the first device may first determine that the first device determines that at least one of the second rules is satisfied before determining the transmit power of the first device on the edge link according to the edge link power parameter.

Wherein the second rule comprises:

When it is detected that the relevant path loss information of the first device and the M second devices does not satisfy any of the second rules, it may be determined that the transmission power of the first device determined according to the side link power parameter cannot normally communicate on the side link under the condition of alleviating the interference requirement on the network device.

Illustratively, the first device transmits the indication information of the third power to the M second devices and/or the network device.

Optionally, the first device further sends a third power headroom report to the network device; the third power headroom report carries indication information of the first power, and the third power headroom report is generated by taking the first power as the transmission power of the first device on the side link.

For example, the first device may send the third power to the network device, so that the network device may provide the configured transmission power value not smaller than the third power when configuring the configured transmission power value of the first device for the first device, thereby avoiding that the first device needs to adjust the transmission power of the first device again according to the third power after receiving the configured transmission power value again, and reducing the workload of the first device. Optionally, in this case, the method may be used for the carrier dedicated to the side link or the carrier shared by the side link and the cellular link.

Illustratively, the first device also transmits an indication of the first power parameter to the network device and/or the M second devices. Optionally, the first device may further send a first power headroom report to the M second devices and/or the network device; the first power headroom report carries indication information of a first power parameter, and the first power headroom report is generated by taking first transmission power of the first device as transmission power of the first device.

Optionally, the first device further sends, to the M second devices and/or the network device, indication information of path loss of the side links between the first device and the M second devices.

Further, the network device may further receive a first path loss between the first device and the network device, or a first power of the first device, so as to further improve the reasonableness of configuring the first device with the configured transmission power value of the first device.

Further, the network device may further receive a second path loss between each second device and the network device, or a second power of each second device. The network device may also receive path loss of the edge link between the first device and each second device.

For example, when the network device uses the edge link dedicated carrier for edge link transmission, the network device may further configure a suitable configured transmission power value for the first device according to the received edge link power parameter, so as to avoid interference generated by the first device on transmission on other edge links during transmission.

Optionally, on the basis of any of the above embodiments, the present application further provides a data transmission method. In this embodiment, the transmission power of the first device is not greater than the preset maximum transmission power of the first device.

Illustratively, when the side link power parameter includes a first power parameter, and the first power parameter is a first power P1, the transmission power of the first device needs to satisfy not more than the first power P1 and a preset maximum transmission power, and not less than a third power.

Further, when the side link power parameter further includes a second power parameter, and the second power parameter is a second power P2, the transmit power of the first device needs to satisfy not more than the first power P1, the second power P2, and the preset maximum transmit power, and is not less than the third power.

Illustratively, the preset maximum transmit power includes at least one of:

maximum transmit power allowed by the first device;

the network device configures a maximum transmit power for the first device.

For example, the conditions that the transmission power of the first device needs to satisfy in the above embodiments may be arbitrarily combined without contradiction.

For example, in any of the above embodiments, the network device may determine the transmit power of the first device on the side link according to the second power of some of the M second devices.

Illustratively, the first device/the second device in any of the above embodiments each support multiple transmission modes, and the transmission modes include unicast, multicast, and broadcast. The following takes the first device as an example, and the transmission of the first device/the second device is exemplarily described.

For example, the transmission mode of the first device may adopt a time division multiplexing mode or a frequency division multiplexing mode. Fig. 4a is a schematic diagram of the first device performing transmission in the time division multiplexing mode. Fig. 4b is a schematic diagram of the first device performing transmission in the frequency division multiplexing mode.

As shown in fig. 4a, the first device is unicast, multicast and broadcast on different time domain resources. At this time, the first device may determine the transmission power used by the first device under different transmissions according to the power determination step in the data transmission method in any of the above embodiments.

As shown in fig. 4b, the first device may transmit on different frequency domain resources on the same time domain resource. Different frequency domain resources on the same time domain resource can simultaneously carry out three kinds of transmission, namely unicast, multicast and broadcast, can also carry out at least two kinds of transmission, and can also carry out a plurality of transmissions in the same transmission mode. For example, a first device unicasts to two second devices at the same time. Different transmissions of the first device occupy different frequency domain resources in the same time domain resource, and specifically, may occupy different Physical Resource Blocks (PRBs) on one aggregated Carrier (CC) for each transmission, occupy different subchannels for each transmission, occupy different Bandwidth parts (BWPs) for each transmission, occupy different resource pools for each transmission, or occupy different CCs on the same frequency band for each transmission.

For example, the following describes, in detail, a manner in which a first device determines a transmit power of a first device on a side link when the first device has at least two transmissions for sending data to M second devices via the side link at the same time and the at least two transmissions are transmitted in the same or different manners, with reference to specific embodiments.

For example, when there are multiple transmissions at the same time, the first device may determine the transmit power corresponding to each transmission of the first device using any of the embodiments described above. Before the first device transmits data to the M second devices using the transmit power corresponding to each transmission, whether the sum of the transmit power of the first device at each transmission is too large should also be considered.

And when the sum of the transmission power of the first equipment in each transmission is not more than the eighth power of the first equipment, each transmission of the first equipment uses the transmission power corresponding to each transmission to send data to the M second equipment.

Wherein the eighth power is any one of: the method comprises the steps of configuring a transmission power value, a first power, a second power or a preset maximum transmission power between a first device and M second devices.

For example, when the sum of the transmission powers of the first device under the transmissions is greater than the eighth power of the first device, before the first device transmits data to the M second devices using the transmission power of the first device, the data transmission method further includes:

and adjusting the transmitting power of the first equipment corresponding to each transmission to obtain the adjusted transmitting power of the first equipment corresponding to each transmission, and using the adjusted transmitting power of the first equipment corresponding to each transmission when sending data.

For example, adjusting the transmission power of the first device corresponding to each transmission may specifically be implemented in the following ways.

A first possible adjustment:

and the first equipment determines the transmitting power of the first equipment under each transmission according to the priority of each transmission.

For example, the first device may determine the transmit power for each transmission of the first device based on whether the priority of each transmission is from high to low or from low to high. For example, the transmission with higher priority may be allocated power from the eighth power of the first device in a manner of priority from high to low. Optionally, a corresponding weight coefficient may also be determined for each priority, where the weight coefficient is used to reduce the transmit power corresponding to each transmission, for example, different weight coefficients are determined for each transmission of the first device in a manner that the priority is from high to low, so that the transmit power corresponding to a transmission with a higher priority is reduced less. Optionally, different weight coefficients correspond to different priority parameter values.

A second possible adjustment:

the first device determines the transmission with the transmission power of 0 and the transmission power corresponding to the transmission with the transmission power of not 0 according to the sequence from low to high of the priority of each transmission, and discards the transmission with the transmission power of 0.

For example, for a transmission with a lower priority, the transmission power corresponding to the transmission may be adjusted to 0, i.e., the first device discards sending the transmission. For example, the transmission to be dropped may be determined among all transmissions based on the sum of the transmit power of the first device at each transmission and the eighth power of the first device.

A third possible adjustment:

and the first equipment distributes the eighth power to various transmissions according to a preset proportion, and determines the transmitting power of the first equipment under each transmission.

Illustratively, the first device allocates an eighth power to the various transmissions in a preset proportion. For example, the preset proportion may be equal, or may be a proportion corresponding to each transmission determined according to the priority.

A fourth possible adjustment:

and the first equipment determines the transmitting power of the first equipment under each transmission according to the congestion level of the channel corresponding to each transmission.

Illustratively, a higher congestion level corresponds to a more reduced transmit power, and a higher congestion level results in a more congested transmission.

A fifth possible adjustment:

the first device determines a power configuration/dropping order for each transmission according to predefined rules, and the first device determines transmit powers for dropped transmissions and non-dropped transmissions according to the power configuration/dropping order for each transmission.

For example, the predefined rule may be determined by any one or more of a number size of each second device, a priority of each second device, a number size of a CC in which each transmission is located, a size of a subcarrier spacing SCS used for each transmission, a number size of each transmission or a number size of a HARQ process, a size of data transmitted by each transmission, a priority of a traffic corresponding to each transmission, and the like.

A sixth possible adjustment:

For example, the first device further adjusts the transmission order/time of each transmission, determines the transmission that can be performed in this transmission among all the transmissions according to the eighth power of the first device, and transmits the remaining transmissions at the next time.

Exemplarily, the embodiment of the present application further provides a data transmission method. In the method, the first device determines the transmitting power of the first device on the side link according to the side link power parameter, and the method comprises the following steps:

and the first equipment determines the transmission power of the transmission of the first equipment on each side link according to the side link power parameter and the transmission of the first equipment on each side link.

For example, the transmission of the first device on each side link includes a transmission mode of each transmission, and may further include a transmission parameter of each transmission. Illustratively, the transmission parameters include any one or more of the number size of each second device, the priority of each second device, the number size of the CC in which each transmission is located, the size of the subcarrier spacing SCS used for each transmission, the number size of each transmission or the number size of the HARQ process, the size of data transmitted by each transmission, the priority of the traffic corresponding to each transmission, and the like.

For example, when determining the transmission power of the first device, the transmission mode and/or transmission of the transmission may be referred to while referring to the side link power parameter, so as to determine the transmission power corresponding to each transmission of the first device, so that the first device sends data to the M second devices using the transmission power corresponding to each transmission.

For example, the first device determines the transmission power of the transmission of the first device on each side link according to the side link power parameter and the transmission of the first device on each side link, which may specifically include the following several possible implementation manners:

the first equipment determines the transmitting power of the first equipment under each transmission according to the priority of each transmission and the side link power parameter; alternatively, the first and second electrodes may be,

the first device determines the transmit power of the first device at each transmission according to predefined rules and side link power parameters.

In an embodiment, in each of the foregoing embodiments of the present application, a first device may send data to M second devices on a carrier where a cellular link is located by using a transmission power of the first device, where the cellular link is a link where a terminal device communicates with a base station device.

The present application further provides a data transmission device, configured to execute the data transmission method on the first device side in any of the above embodiments, and having the same or similar technical features and technical effects.

Fig. 5 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. As shown in fig. 5, the data transmission apparatus includes:

an obtaining module 501, configured to determine, according to the side link power parameter, a transmit power of a first device on the side link; the sidelink power parameter includes at least one of: a first power parameter between a first device and a network device, a second power parameter between M second devices and the network device, and a configured transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1;

a sending module 502, configured to send data to M second devices using the transmission power of the first device.

Optionally, the first power parameter is a first path loss between the first device and the network device, or a first power obtained according to the first path loss; the second power parameter of one of the M second devices is a second path loss between the second device and the network device, or a second power obtained according to the second path loss.

Optionally, the side link power parameter includes a first power parameter, where the first power parameter is a first power, and the transmission power of the first device is not greater than the first power.

Optionally, the side link power parameter further includes M second power parameters, where the second power parameter is second power, and the transmission power of the first device is not greater than at least one of the first power parameter and the M second powers.

Optionally, the transmission power of the first device is the minimum value of the first power and the M second powers.

Optionally, the side link power parameter includes a first power parameter, the first power parameter is a first path loss between the first device and the network device, and the transmission power of the first device is not greater than a first power obtained according to the first path loss.

Optionally, the edge link power parameters further include M second power parameters, the second power parameter of one of the M second devices is a second path loss between the second device and the network device, the transmission power of the first device is not greater than the first power obtained according to the first path loss, and the M second powers obtained according to the M second path losses.

Optionally, the open-loop power parameters of the first device and the M second devices are the same, the path loss compensation factors between the first device and the M second devices and the network device are the same, and the transmission power of the first device is the transmission power obtained according to the minimum path loss of the first path loss and the M second path losses.

Optionally, the first power is determined according to the open-loop power parameter, the first path loss, a path loss compensation factor between the first device and the network device, and a transmission bandwidth of the first device.

Optionally, the side link power parameter includes a configured transmission power value between the first device and the M second devices, and the obtaining module 501 is specifically configured to determine the configured transmission power value as the transmission power of the first device.

Optionally, the configured transmission power values on the side links between the first device and the M second devices are the same; the configured transmit power value is received through signaling or is preconfigured or predefined.

Optionally, the side link power parameter includes a configured transmit power value between the first device and the M second devices, and the obtaining module 501 is specifically configured to use a maximum value of a third power and the configured transmit power as the transmit power of the first device, where the third power is determined by the first device according to a path loss of the side link between the first device and the M second devices.

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module 501 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the configured transmission power value is not greater than the first power, and the obtaining module 501 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module 501 is specifically configured to determine the configured transmission power value as the transmission power of the first device, where the configured transmission power value is not greater than the first power and the M second powers.

Optionally, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, and the configured transmission power value is not greater than the first power and the M second powers, and the obtaining module 501 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the obtaining module 501 is specifically configured to,

Optionally, the transmission power of the first device is not less than the third power;

Optionally, as shown in fig. 5, the data transmission device further includes:

a detection module 503 for determining that at least one of the first rules is satisfied; the first rule includes:

the third power is not greater than the second power;

Optionally, the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the detecting module 503 is further configured to,

Optionally, as shown in fig. 5, the data transmission device further includes:

a receiving module 504, configured to receive indication information of a second power parameter of each second device sent by M second devices; alternatively, the first and second electrodes may be,

Optionally, the sending module 502 is further configured to send the indication information of the first power parameter to the M second devices and/or the network devices.

Optionally, the sending module 502 is further configured to send the indication information of the third power to the M second devices and/or the network devices.

Optionally, the sending module 502 is further configured to send, to the M second devices and/or the network device, indication information of path loss of the side links between the first device and the M second devices.

Optionally, the sending module 502 is further configured to send the first power headroom report to M second devices and/or network devices;

Optionally, the receiving module 504 is further configured to receive M second power headroom reports sent by the M second devices, or receive, by the first device, the second power headroom reports of the M second devices sent by the network device;

Optionally, the sending module 502 is further configured to send a third power headroom report to the network device;

Optionally, the transmission power of the first device is not greater than the preset maximum transmission power of the first device.

Optionally, the preset maximum transmission power includes at least one of the following:

the network device configures a maximum transmit power for the first device.

Optionally, the sending module 502 is specifically configured to send, in a unicast manner, data to M second devices by using the transmission power of the first device, where M is 1; or the like, or, alternatively,

Optionally, the first device has at least two transmissions for sending data to the M second devices through the side link at the same time, where the transmission mode of the side link includes at least two of the following: unicast, multicast and broadcast, at least two transmissions being transmitted in the same or different manner.

Optionally, the detecting module 503 is further configured to determine that the sum of the transmission powers at each transmission is not greater than an eighth power of the first device, where the eighth power is any one of the following:

Optionally, the sum of the transmission powers of the first device under each transmission is greater than the eighth power of the first device, and the data transmission device further includes an adjusting module 505 for adjusting the transmission power of the first device

Optionally, the sending module 502 is specifically configured to send data to M second devices on a carrier where a cellular link is located by using the transmission power of the first device, where the cellular link is a link through which the terminal device communicates with the network device.

Fig. 6 is a schematic structural diagram of a data transmission device according to a second embodiment of the present application. As shown in fig. 6, the data transmission apparatus includes:

a processor 601, configured to determine, according to the side link power parameter, a transmit power of a first device on the side link; the sidelink power parameter includes at least one of: a first power parameter between a first device and a network device, a second power parameter between M second devices and the network device, and a configured transmission power value between the first device and the M second devices, wherein M is a positive integer not less than 1;

a transmitter 602 for transmitting data to the M second devices using the transmit power of the first device.

Optionally, the side link power parameter includes a configured transmission power value between the first device and the M second devices, and the processor 601 is specifically configured to determine the configured transmission power value as the transmission power of the first device.

Optionally, the edge link power parameter includes a configured transmit power value between the first device and the M second devices, and the processor 601 is specifically configured to use a maximum value of a third power and the configured transmit power as the transmit power of the first device, where the third power is a power determined by the first device according to a path loss of the edge link between the first device and the M second devices.

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor 601 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the configured transmission power value is not greater than the first power, and the processor 601 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor 601 is specifically configured to determine the configured transmission power value as the transmission power of the first device, where the configured transmission power value is not greater than the first power and the M second powers.

Optionally, the power control parameter of the side link of the first device is the same as the power control parameter of the communication link between the first device and the network device and the power control parameters of the communication links between the M second devices and the network device, and the configured transmission power value is not greater than the first power and the M second powers, where the processor 601 is specifically configured to determine the configured transmission power value as the transmission power of the first device;

Optionally, the side link power parameter further includes a configured transmission power value between the first device and the M second devices, and the processor 601 is specifically configured to,

Optionally, the data transmission device further includes:

the third power is not greater than the second power;

Optionally, the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and the detection module is further configured to,

Optionally, the data transmission device further includes:

a receiver 603, configured to receive indication information of a second power parameter of each second device sent by M second devices; alternatively, the first and second electrodes may be,

Optionally, the transmitter 602 is further configured to transmit the indication information of the first power parameter to the M second devices and/or network devices.

Optionally, the transmitter 602 is further configured to transmit information indicating the third power to the M second devices and/or the network devices.

Optionally, the transmitter 602 is further configured to transmit, to the M second devices and/or the network device, information indicating a path loss of the side link between the first device and the M second devices.

Optionally, the transmitter 602 is further configured to transmit a first power headroom report to the M second devices and/or network devices;

Optionally, the receiver 603 is further configured to receive M second power headroom reports sent by the M second devices, or receive, by the first device, the second power headroom reports of the M second devices sent by the network device;

Optionally, the transmitter 602 is further configured to transmit a third power headroom report to the network device;

the network device configures a maximum transmit power for the first device.

Optionally, the transmitter 602 is specifically configured to transmit, in a unicast manner, data to M second devices by using the transmission power of the first device, where M is 1; or the like, or, alternatively,

Optionally, the processor 601 is further configured to determine that a sum of transmission powers at the transmissions is not greater than an eighth power of the first device, where the eighth power is any one of:

Optionally, the sum of the transmission power of the first device at each transmission is greater than the eighth power of the first device, and the processor 601 is further configured to,

Optionally, the transmitter 602 is specifically configured to use the transmission power of the first device to transmit data to the M second devices on a carrier where a cellular link is located, where the cellular link is a link for the terminal device to communicate with the network device.

The application also provides a data transmission device. Fig. 7 is a schematic structural diagram of a data transmission device according to a third embodiment of the present application. As shown in fig. 7, the data transmission device includes a processor 701, a memory 702, a communication interface 703, and a bus 704; wherein the content of the first and second substances,

the processor 701, the memory 702 and the communication interface 703 are connected by a bus 704 to complete mutual communication, the memory 702 is used for storing computer execution instructions, and when the device runs, the processor 701 executes the computer execution instructions in the memory 702 to execute the steps in the data transmission method on the first device side in any of the above embodiments by using hardware resources in the device.

The present application further provides an electronic device, comprising: a processor, memory and computer program;

a computer program is stored in the memory, and the processor executes the computer program to perform the steps in the data transmission method on the first device side as in any of the above embodiments.

The present application also provides a computer storage medium including a computer program for implementing the steps in the data transmission method on the first device side as in any of the above embodiments.

The present application also provides a computer program product comprising computer program code which, when run on a computer, causes the computer to perform the steps in the data transmission method on the first device side as in any of the embodiments described above.

The present application further provides a chip, including a memory and a processor, where the memory is used for storing a computer program, and the processor is used for calling and running the computer program from the memory, so that an electronic device installed with the chip executes the steps in the data transmission method on the first device side in any of the above embodiments.

In the present application, "at least one" means one or more, "a plurality" means two or more. "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, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The processors referred to in the embodiments of the present application may be general purpose processors, digital signal processors, application specific integrated circuits, field programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a 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 memory related to the embodiment of the present application may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory (RAM), for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such.

In the several embodiments provided in the present application, it should be understood that the disclosed 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 integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

It should be understood by those of ordinary skill in the art 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 limit the implementation process of the embodiments of the present application.

In the above embodiments, all or part of the implementation may be realized by software, hardware, firmware or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

Claims

1. A method of data transmission, comprising:

the first equipment determines the transmitting power of the first equipment on the side link according to the side link power parameter; the side link power parameter includes at least one of: a first power parameter between the first device and a network device, and a configured transmission power value between the first device and M second devices, wherein M is a positive integer not less than 1;

the first device transmits data to the M second devices by using the transmission power of the first device;

wherein the transmission power of the first device is not greater than the first power, and the transmission power of the first device is not less than a third power; the first power is determined by a first path loss between the first device and the network device; the third power is determined by the first device according to the path loss of the edge link between the first device and the M second devices.

2. The method of claim 1, wherein the first power parameter is a first path loss between the first device and the network device, or a first power obtained according to the first path loss;

and the second power parameter of one of the M second devices is a second path loss between the second device and the network device, or a second power obtained according to the second path loss.

3. The method of claim 2, wherein the side-link power parameter comprises the first power parameter, wherein the first power parameter is the first power, and wherein a transmit power of the first device is not greater than the first power.

4. The method of claim 2, wherein the side-link power parameter comprises the first power parameter, wherein the first power parameter is a first path loss between the first device and the network device, and wherein a transmit power of the first device is not greater than a first power obtained according to the first path loss.

5. The method of any one of claims 2-4, wherein the side link power parameter comprises a configured transmit power value between the first device and the M second devices, and wherein the first device determines the transmit power of the first device on the side link according to the side link power parameter, comprising:

the first device determines the configured transmit power value as a transmit power of the first device.

6. The method of claim 3, wherein the side-link power parameter further includes configured transmission power values between the first device and the M second devices, and wherein the determining, by the first device, the transmission power of the first device on the side-link according to the side-link power parameter comprises:

the configured transmission power value is greater than the first power, and the first device uses the first power or the third power as the transmission power of the first device on the side link; alternatively, the first and second electrodes may be,

the first device takes a fourth power not greater than the first power as the transmission power of the first device; alternatively, the first and second electrodes may be,

the first device takes a fifth power which is not more than the first power and not less than the third power as the transmission power of the first device;

wherein the third power is determined according to a path loss compensation factor of the edge links of the first device and the M second devices, a transmission bandwidth of the first device, path losses of the edge links of the first device and the M second devices, and an open loop power parameter.

7. The method according to any of claims 2-4, 6, wherein before the first device determines the transmit power of the first device on the sidelink according to the sidelink power parameter, the method further comprises:

the first device determining that at least one of first rules is satisfied; the first rule includes:

the third power is not greater than the second power;

8. The method according to any of claims 2-4 and 6, wherein the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, and before the first device determines the transmit power of the first device on the edge link according to the edge link power parameter, the method further comprises:

the first device determining that at least one of second rules is satisfied; the second rule includes:

the path loss of the side links of the first device and the M second devices is not greater than the first path loss between the first device and the network device; or the like, or, alternatively,

the path loss of the first device and the edge links of the M second devices is not greater than the second path loss between the M second devices and the network device.

9. The method according to any of claims 2-4, 6, wherein before the first device determines the transmit power of the first device on the sidelink according to the sidelink power parameter, the method further comprises:

the first device receives indication information of a second power parameter of each second device, which is sent by the M second devices; alternatively, the first and second electrodes may be,

and the first equipment receives indication information of the second power parameters of the M second equipment, which is sent by the network equipment.

10. The method according to any one of claims 2-4, 6, further comprising:

and the first equipment sends the indication information of the first power parameter to the M second equipment and/or the network equipment.

11. The method of claim 6, further comprising:

and the first equipment sends the indication information of the third power to the M second equipment and/or the network equipment.

12. The method of any of claims 2-4, 6, 11, further comprising:

and the first equipment sends indication information of the path loss of the side links of the first equipment and the M second equipment to the M second equipment and/or the network equipment.

13. The method of any of claims 2-4, 6, 11, further comprising:

the first device sends a first power headroom report to the M second devices and/or the network device;

the first power headroom report carries indication information of the first power parameter, and the first power headroom report is generated by taking first power of the first device as transmission power of the first device.

14. The method according to any of claims 2-4, 6, 11, wherein before the first device determines the transmit power of the first device on the sidelink based on the sidelink power parameter, the method further comprises:

the first device receives M second power headroom reports sent by the M second devices, or the first device receives the second power headroom reports of the M second devices sent by the network device;

a second power headroom report of any one of the second devices carries indication information of a second power parameter of the second device, where the second power headroom report is generated by using a second power of the second device as a transmission power of the second device.

15. The method according to any of claims 2-4, 6, 11, wherein the transmission power of the first device is not greater than a preset maximum transmission power of the first device.

16. The method according to any of claims 2-4, 6, 11, wherein the first device has at least two transmissions to send data to the M second devices over the side link at the same time, and wherein the transmission mode of the side link comprises at least two of: unicast, multicast and broadcast, the transmission modes of the at least two transmissions being the same or different.

17. The method of claim 16, wherein a sum of transmit powers of the first device at each transmission is greater than an eighth power of the first device, and wherein before the first device transmits data to the M second devices using the transmit power of the first device, the method further comprises:

the first device determines transmission with the transmission power of 0 and transmission power corresponding to transmission with the transmission power of not 0 according to the sequence of the priority of each transmission from low to high, and discards the transmission with the transmission power of 0; alternatively, the first and second electrodes may be,

the first equipment distributes the second power to each transmission according to a preset proportion, and determines the transmitting power of the first equipment under each transmission; alternatively, the first and second electrodes may be,

the first equipment determines the transmitting power of the first equipment under each transmission according to the congestion level of the channel corresponding to each transmission and the side link power parameter; alternatively, the first and second electrodes may be,

the first device determines a power configuration/dropping order of each of the transmissions according to a predefined rule, and the first device determines transmit powers of dropped transmissions and non-dropped transmissions according to the power configuration/dropping order of each of the transmissions; alternatively, the first and second electrodes may be,

and the first equipment determines the sending order of each transmission according to a predefined rule, and determines the transmitting power of the first equipment under each transmission according to the sending order of each transmission.

18. A data transmission device, as a first device, comprising:

a processor, configured to determine, according to an edge link power parameter, a transmit power of the first device on an edge link; the side link power parameter includes at least one of: a first power parameter between the first device and a network device, and a configured transmission power value between the first device and M second devices, wherein M is a positive integer not less than 1;

a transmitter, configured to transmit data to the M second devices using a transmission power of the first device, where the transmission power of the first device is not greater than the first power, and the transmission power of the first device is not less than a third power; the first power is determined by a first path loss between the first device and the network device; the third power is determined by the first device according to the path loss of the edge link between the first device and the M second devices.

19. The device of claim 18, wherein the first power parameter is a first path loss between the first device and the network device, or a first power obtained according to the first path loss;

20. The device of claim 19, wherein the side-link power parameter comprises the first power parameter, wherein the first power parameter is the first power, and wherein a transmit power of the first device is not greater than the first power.

21. The device of claim 19, wherein the side-link power parameter comprises the first power parameter, wherein the first power parameter is a first path loss between the first device and the network device, and wherein a transmit power of the first device is not greater than a first power obtained according to the first path loss.

22. The apparatus of any of claims 19-21, wherein the side-link power parameter comprises a configured transmit power value between the first apparatus and the M second apparatuses, and wherein the processor is specifically configured to determine the configured transmit power value as a transmit power of the first apparatus.

23. The device of claim 20, wherein the side-link power parameter further comprises a configured transmit power value between the first device and the M second devices, and wherein the processor is further configured to,

taking the first power or the third power as the transmission power of the first equipment on the side link; alternatively, the first and second electrodes may be,

taking a fourth power not greater than the first power as a transmit power of the first device; alternatively, the first and second electrodes may be,

taking a fifth power, which is not greater than the first power and not less than the third power, as a transmission power of the first device;

wherein the configured transmission power value is greater than the first power, and the third power is determined according to a path loss compensation factor of edge links between the first device and the M second devices, a transmission bandwidth of the first device, path losses of edge links between the first device and the M second devices, and an open loop power parameter.

24. The apparatus of any of claims 19-21, 23, wherein the processor is further configured to determine that at least one of a first rule is satisfied; the first rule includes:

the third power is not greater than the second power;

25. The device of any of claims 19-21, 23, wherein the power control parameter of the edge link of the first device is the same as the power control parameter of the communication link between the first device and the network device, wherein the first device is further configured to determine that at least one of the second rules is satisfied based on the edge link power parameter; the second rule includes:

26. The apparatus according to any of claims 19-21, 23, further comprising:

a receiver, configured to receive indication information of a second power parameter of each of the M second devices, where the indication information is sent by the M second devices; alternatively, the first and second electrodes may be,

27. The device according to any of claims 19-21, 23, wherein said transmitter is further configured to transmit an indication of said first power parameter to said M second devices and/or said network device.

28. An electronic device, comprising: a processor, memory and computer program;

the computer program is stored in the memory, and the processor executes the computer program to perform the data transmission method according to any one of claims 1 to 17.

29. A computer storage medium, characterized in that the storage medium comprises a computer program for implementing the data transmission method according to any one of claims 1-17.

30. A chip comprising a memory for storing a computer program and a processor for calling and running the computer program from the memory so that an electronic device in which the chip is installed performs the data transmission method according to any one of claims 1 to 17.