CN117641619A

CN117641619A - Direct communication method and device

Info

Publication number: CN117641619A
Application number: CN202210989335.5A
Authority: CN
Inventors: 邢卫民; 卢有雄; 苗婷; 胡宇洲
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2024-03-01
Also published as: WO2024037492A1

Abstract

A direct communication method and device relates to the technical field of communication, and is used for controlling the transmitting power of each direct communication channel when the direct communication is carried out so as to improve the communication quality and reduce the energy loss. The communication method comprises the following steps: selecting M second direct communication channels from N first direct communication channels to be transmitted, and determining the transmitting power of each second direct communication channel in the M second direct communication channels, wherein the sum of the transmitting powers of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N; and transmitting the M second direct communication channels based on the transmission power of each second direct communication channel in the M second direct communication channels.

Description

Direct communication method and device

Technical Field

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

Background

Direct communication is wireless communication that is performed directly between two or more terminal devices. In such communication, two or more terminal devices geographically close to each other can communicate directly without passing through any network device. Direct communication has wide application in daily life; illustratively, direct communication means include, but are not limited to, device-to-Device (D2D) communication, early warning communication of disasters such as earthquakes, fires, etc., and vehicle-to-all (vehicle to everything, V2X) communication, such as remote driving, unmanned driving, etc.

In the application scenario of direct communication, the terminal device in the direct communication system has the limitation of maximum transmitting power, and how to perform power allocation is a technical problem to be solved.

Disclosure of Invention

The application provides a direct communication method and a direct communication device, which are used for reasonably distributing the transmitting power of each direct communication channel when direct communication is carried out so as to meet the limiting requirement of the maximum transmitting power.

In a first aspect, a direct communication method is provided, the method comprising: selecting M second direct communication channels from N first direct communication channels to be received, determining the transmitting power of each second direct communication channel in the M second direct communication channels, wherein the sum of the transmitting powers of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N; and transmitting the M second direct communication channels based on the transmission power of each of the M second direct communication channels.

In some embodiments, if the N first direct communication channels include a new air interface NR direct data channel and N ₁ The M second direct communication channels comprise NR direct data channels and/or N direct feedback channels ₂ A plurality of direct feedback channels; wherein N is ₁ Equal to N-1, N ₂ Less than or equal to min (N) ₁ ，N _max )，N _max The maximum number of direct feedback channels transmitted simultaneously is supported for the terminal device.

In some embodiments, the transmit power of each of the M second direct communication channels is equal to its corresponding required power.

In some embodiments, at N ₁ Less than or equal to N _max And N ₁ Sum of the required power of the direct feedback channels and the required power of the NR direct data channelsIn case of less than or equal to the maximum transmit power of the terminal device, the M second direct communication channels comprise NR direct data channels and N ₁ And directly connected feedback channels.

In some embodiments, at N ₁ Less than or equal to N _max And N ₁ In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is greater than the maximum transmission power of the terminal device, M second direct-connection communication channels include NR direct-connection data and the first N in the first arrangement order ₂ A first arrangement sequence of N direct-connection feedback channels ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

In some embodiments, at N ₁ Less than or equal to N _max And N ₁ Under the condition that the sum of the required power of the direct connection feedback channels and the required power of the NR direct connection data channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M first direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

In some embodiments, at N ₁ Greater than N _max And N _max In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is less than or equal to the maximum transmission power of the terminal device, M second direct-connection communication channels include one NR direct-connection data channel and N _max And directly connected feedback channels.

In some embodiments, at N ₁ Greater than N _max And N _max In the case that the sum of the required power of the direct feedback channels and the required power of the NR direct data channels is greater than the maximum transmission power of the terminal device, M second direct communication channels include the NR direct data channels and the first N in the first permutation order ₂ A first arrangement sequence of N direct-connection feedback channels ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

In some implementationsIn the embodiment, at N ₁ Greater than N _max And a NR directly connecting the required power of the data channel and N _max Under the condition that the sum of the required power of the direct connection feedback channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M first direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

In some embodiments, each of the M second direct communication channels is transmitted with the same power spectral density.

In some embodiments, the M second direct communication channels include NR direct data channels and N ₂ In the case of a direct feedback channel, N ₂ The transmitting power of each direct feedback channel in the direct feedback channels is less than or equal to X of the maximum transmitting power of the terminal equipment ₁ X is multiple of ₁ Equal to the ratio of the bandwidth of a direct feedback channel to a first total bandwidth of N ₂ The sum of the bandwidth of the individual direct feedback channels and the bandwidth of the NR direct data channels.

In some embodiments, the transmit power of the direct-connect data channel is less than or equal to X, the maximum transmit power of the terminal device ₂ X is multiple of ₂ Equal to the ratio of the bandwidth of the direct data channel to the first total bandwidth.

In some embodiments, the transmitting capability of the terminal device supports transmitting M second direct communication channels.

In some embodiments, if the receiving capability of the terminal device does not support receiving the N first direct communication channels, on the premise that the receiving capability of the terminal device is not exceeded, the M second direct communication channels are the first M first direct communication channels in a third permutation sequence, where the third permutation sequence is obtained by permutation of the N first direct communication channels.

In some embodiments, the third ranking order is obtained by ranking the N first direct communication channels based on the priorities of the respective first direct communication channels; wherein the first direct communication channel with the higher priority is located before the first direct communication channel with the lower priority in the third arrangement order.

In some embodiments, the third ranking is obtained by ranking the N first direct communication channels based on the priority and the transmission level of each first direct communication channel; wherein, the first direct communication channel with high transmission level is positioned before the first direct communication channel with low transmission level in the third arrangement sequence; and, for two first direct communication channels having the same transmission rank, the first direct communication channel having the higher priority is located before the first direct communication channel having the lower priority in the third ranking order.

In some embodiments, the transmission level satisfies one or more of the following rules: the transmission level of the direct-connection data channel is higher than that of the direct-connection data channel; the transmission level of the direct-connection data channel is higher than that of the direct-connection feedback channel; the transmission level of the NR direct communication channel is higher or lower than that of the LTE direct communication channel; or, the transmission level of the direct feedback channel for carrying the hybrid automatic repeat request response information is higher than the transmission level of the direct feedback channel for carrying the collision indication.

In some embodiments, the above method further comprises: under the condition that a plurality of direct communication channels overlap in time domain, acquiring a receiving priority and a sending priority; the plurality of direct communication channels comprise N first direct communication channels to be sent and P third direct communication channels to be received, wherein P is a positive integer; based on the comparison result of the reception priority and the transmission priority, it is determined to perform the reception operation or to perform the transmission operation.

In some embodiments, determining to perform the receiving operation or performing the transmitting operation based on the comparison result of the receiving priority and the transmitting priority includes: if the sending priority is higher than the receiving priority, determining to execute the sending operation; or if the sending priority is lower than the receiving priority, determining to execute the receiving operation; or if the transmission priority is equal to the reception priority, determining to execute the transmission operation or the reception operation.

In some embodiments, the transmission priority is the highest priority among the priorities of the N first direct communication channels.

In some embodiments, the received priority is the highest priority among the priorities of the P third direct communication channels; or, the receiving priority is the highest priority among the priorities of all target types of the P third direct communication channels, and the target types include one or more of LTE direct data channels, LTE direct with step channels, NR direct with step channels, or direct feedback channels.

In some embodiments, after determining to perform the receiving operation, the method further comprises: k fourth direct communication channels are selected from the P third direct communication channels, wherein K is a positive integer smaller than or equal to P; k fourth direct communication channels are received.

In some embodiments, if the receiving capability of the terminal device does not support receiving P third direct communication channels, on the premise that the receiving capability of the terminal device is not exceeded, the K fourth direct communication channels are the first K direct communication channels in a fourth permutation order, where the fourth permutation order is obtained by permutation of the P third direct communication channels.

In some embodiments, the fourth ranking order is obtained by ranking the P third direct communication channels based on the priorities of the respective third direct communication channels; wherein the third direct communication channel with the higher priority is located before the third direct communication channel with the lower priority in the fourth arrangement order.

In some embodiments, the fourth ranking is obtained by ranking the P third direct communication channels based on the priority and the reception level of each third direct communication channel; wherein the third direct communication channel with high receiving level is positioned before the third direct communication channel with low receiving level in the fourth arrangement sequence; and, for two third direct communication channels having the same reception level, the third direct communication channel having the higher priority is located before the third direct communication channel having the lower priority in the fourth arrangement order.

In some embodiments, the transmission level satisfies one or more of the following rules: the receiving level of the direct connection data channel is higher than that of the direct connection data channel; the receiving level of the direct connection data channel is higher than that of the direct connection feedback channel; the receiving level of the NR direct communication channel is higher or lower than that of the LTE direct communication channel; or, the receiving level of the direct feedback channel for carrying the hybrid automatic repeat request response information is higher than the receiving level of the direct feedback channel for carrying the conflict indication.

In some embodiments, the format of the direct feedback channel includes a first format and/or a second format; wherein, the time domain resource of the direct-connection feedback channel of the first format occupies part of symbols for direct-connection communication in a time slot; the time domain resource of the direct-connection feedback channel of the second format occupies all symbols for direct-connection communication in one time slot.

In some embodiments, the direct feedback channel is transmitted in the second format on the time slot for transmitting the direct feedback channel if the time slot for transmitting the direct feedback channel overlaps with the time slot comprised by the resource pool for LTE direct communication.

In some embodiments, the direct feedback channel is transmitted in the second format on a time slot comprised by a pool of resources for NR direct communication.

In some embodiments, the frequency domain resources of the second format direct feedback channel on one slot are located at different frequency domain locations than the frequency domain resources of the NR direct data channel on the same slot.

In a second aspect, there is provided a direct communication device, the device comprising: the processing module is used for selecting M second direct communication channels from N first direct communication channels to be received, determining the transmitting power of each second direct communication channel in the M second direct communication channels, wherein the sum of the transmitting power of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N; and the transmitting module is used for transmitting the M second direct communication channels based on the transmitting power of each second direct communication channel in the M second direct communication channels.

In some embodiments, if N first direct communication channelsComprises a new air interface NR direct connection data channel and N ₁ The M second direct communication channels comprise NR direct data channels and/or N direct feedback channels ₂ A plurality of direct feedback channels; wherein N is ₁ Equal to N-1, N ₂ Less than or equal to min (N) ₁ ，N _max )，N _max The maximum number of direct feedback channels transmitted simultaneously is supported for the terminal device.

In some embodiments, at N ₁ Less than or equal to N _max And N ₁ In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is less than or equal to the maximum transmitting power of the terminal device, M second direct-connection communication channels comprise NR direct-connection data channels and N ₁ And directly connected feedback channels.

In some embodiments, at N ₁ Greater than N _max And N _max Demand power and NR direct-link data for individual direct-link feedback channelsIn the case that the sum of the required powers of the channels is less than or equal to the maximum transmit power of the terminal device, M second direct communication channels include an NR direct data channel and N _max And directly connected feedback channels.

In some embodiments, at N ₁ Greater than N _max And a NR directly connecting the required power of the data channel and N _max Under the condition that the sum of the required power of the direct connection feedback channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M first direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

In some embodiments, the transmit power of the direct-connect data channel is less than or equal to X, the maximum transmit power of the terminal device ₂ X is multiple of ₂ Equal to the bandwidth and the first of the direct data channelsRatio of total bandwidth.

In some embodiments, the processing module is further configured to obtain a reception priority and a transmission priority when the plurality of direct communication channels overlap in a time domain; the plurality of direct communication channels comprise N first direct communication channels to be sent and P third direct communication channels to be received, wherein P is a positive integer; based on the comparison result of the reception priority and the transmission priority, it is determined to perform the reception operation or to perform the transmission operation.

In some embodiments, the processing module is specifically configured to determine to perform the sending operation if the sending priority is higher than the receiving priority; or if the sending priority is lower than the receiving priority, determining to execute the receiving operation; or if the transmission priority is equal to the reception priority, determining to execute the transmission operation or the reception operation.

In some embodiments, the processing module is further configured to select K fourth direct communication channels from the P third direct communication channels after determining to perform the receiving operation, where K is a positive integer less than or equal to P; k fourth direct communication channels are received.

In a third aspect, a terminal device is provided, including a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor implements any one of the direct communication methods provided in the embodiments of the present application when the computer program is executed.

In a fourth aspect, a computer-readable storage medium is provided, the computer-readable storage medium comprising computer instructions; when the computer instructions run on the terminal device, the terminal device is caused to execute any one of the direct communication methods provided in the embodiments of the present application.

Drawings

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

fig. 2 is a resource allocation diagram of a slot according to an embodiment of the present application;

fig. 3 is a resource allocation diagram of another slot according to an embodiment of the present application;

fig. 4 is a schematic flow chart of a method for direct communication according to an embodiment of the present application;

fig. 5 is a flow chart of another direct communication method according to an embodiment of the present application;

fig. 6 is a flow chart of another direct communication method according to an embodiment of the present application;

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

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

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, "/" means "or" unless otherwise indicated, for example, a/B may mean a or B. "and/or" herein is merely an association relationship describing an association object, and means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. Furthermore, "at least one" means one or more, and "a plurality" means two or more. The terms "first," "second," and the like do not limit the number and order of execution, and the terms "first," "second," and the like do not necessarily differ.

In this application, the terms "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Direct communication, which may also be referred to as Sidelink (SL) communication, sidelink communication, or PC5 interface link communication, or inter-terminal device link communication, is wireless communication directly between a plurality of terminal devices (e.g., two terminal devices). In such direct communication, a plurality of terminal apparatuses geographically close to each other can directly communicate without passing through any network apparatus. The data transmission in direct communication differs from typical cellular network communication, which includes Uplink (UL) transmission (i.e., the terminal device sends data to the network device) and Downlink (DL) transmission (i.e., the network device sends data to the terminal device); in direct communication, however, data is transmitted directly from a terminal device at a transmitting end to a terminal device at a receiving end through an air interface such as a PC5 interface, without passing through any network device. Direct communication means include, but are not limited to, device-to-Device (D2D) communication, such as early warning communication of disasters such as earthquakes, fires, etc., vehicle-to-all (V2X) communication, such as remote driving, unmanned driving, etc.

Illustratively, fig. 1 shows a schematic structural diagram of a direct communication system according to an embodiment of the present application. As shown in fig. 1, in the direct communication system, when there is a service between terminal devices that needs to be transmitted, service data of the service data is directly transmitted from a data source terminal device (such as terminal device 1 shown in fig. 1) to a target terminal device (such as terminal device 2 shown in fig. 1) through a side uplink, without passing through a network side device (i.e., without passing through a cellular link between the terminal device and the network side device shown by a dotted line in fig. 1). This mode of direct communication between terminal device 1 and terminal device 2 has features that are significantly different from the conventional cellular system communication mode: for the near field communication user capable of applying the direct communication, the direct communication not only saves wireless spectrum resources, but also reduces the data transmission pressure of the core network, can reduce the occupation of system resources, increases the spectrum efficiency of the cellular communication system, reduces the transmitting power consumption of the terminal equipment, and saves the network operation cost to a great extent.

In addition, a terminal device in the direct communication system may also be referred to as a terminal, a User Equipment (UE), a mobile station, a mobile terminal, or the like. The terminal device may be a mobile phone, a tablet computer, a computer with a wireless transceiving function, a virtual reality terminal device, an augmented reality terminal device, a wireless terminal in industrial control, a wireless terminal in unmanned operation, a wireless terminal in teleoperation, a wireless terminal in transportation safety, a wireless terminal in smart city, a wireless terminal in smart home, or the like. The embodiment of the application does not limit the specific technology and the specific equipment form adopted by the terminal equipment.

Alternatively, the direct communication channel in the embodiments of the present application may be classified from the communication system as a long term evolution (long term evolution, LTE) direct communication channel, a New Radio (NR) direct communication channel, or a direct communication channel under a future network (e.g., 6G). The direct communication channels in the embodiments of the present application may be functionally categorized into direct data channels, direct along with step channels, and direct feedback channels.

Optionally, the direct data channel is a channel for transmitting data or control information. By way of example, the direct data channels may include a physical sidelink control channel (physical sidelink control channel, PSCCH) and a physical sidelink shared channel (physical sidelink sharing channel, PSSCH).

Alternatively, the direct-along-with-step channel is a channel for achieving time synchronization. Illustratively, the direct and indirect channels may include a physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH), a sidelink primary synchronization signal (primary sidelink synchronization signal, PSSS), and/or a sidelink secondary synchronization signal (secondary sidelink synchronization signal, SSSS).

Alternatively, the direct feedback channel is a channel for transmitting a feedback channel, and the feedback information may be hybrid automatic repeat request acknowledgement information (hybrid automatic repeat request-ACK, HARQ-ACK), collision indication, etc., which is not limited. Illustratively, the direct feedback channel may include a physical sidelink feedback channel (physical sidelink feedback channel, PSFCH).

It should be understood that direct communication channels under different communication schemes are of different types. Exemplary signal types for the LTE-direct communication channel include LTE-direct data channel and LTE-direct-together-with-step channel. The signal types of the NR direct communication channels include NR direct data channels, NR direct together with step channels and direct feedback channels.

Currently, considering that the resources of carriers or channels are limited, and a process of developing NR technology is expected to realize a smooth transition from LTE technology to NR technology, the first implementation of NR direct communication uses LTE technology infrastructure in a non-independent (NSA) mode, and uses dynamic spectrum sharing (dynamic spectrum sharing, DDS) to enable NR direct communication channels to coexist with LTE direct communication channels. Thus, the terminal device may need to receive the LTE direct data channel, the NR direct data channel, and the direct feedback channel simultaneously on one slot. However, the configuration of the time domain resources of the direct feedback channel in the related art may cause problems in automatic gain control (automatic gain control, AGC) of the terminal device. As shown in fig. 2, in the related art, different symbols are occupied in time division by an NR direct connection feedback channel and an NR direct connection data channel on one slot; LTE direct communication does not support a direct feedback channel, and therefore an LTE direct data channel occupies all available symbols on one slot. In this way, on different symbols of a time slot, the terminal device switches from receiving the LTE direct connection data channel and the NR direct connection data channel to receiving the LTE direct connection data channel and the direct connection feedback channel, so that the receiving power of the terminal device changes, and the AGC of the terminal device is affected.

In order to solve the AGC problem that may exist in the scenario of transmitting the LTE direct connection data channel, the NR direct connection data channel, and the direct connection feedback channel on the same time slot, in the embodiment of the present application, the direct connection feedback channel supports a new format. For convenience of distinction, the old format of the direct feedback channel in the related art will be referred to as a first format, and the new format of the direct feedback channel provided in the embodiment of the present application will be referred to as a second format. Alternatively, the first format may also be referred to as a short format and the second format may also be referred to as a long format.

In some embodiments, the time domain resources of the direct feedback channel of the first format occupy part of the available symbols in one slot, e.g., the last 1-2 symbols in one slot. The time domain resources of the direct-connect feedback channel of the second format occupy all available symbols in one slot. Wherein the available symbols refer to symbols configured for direct communication.

Alternatively, in the case of a direct feedback channel in the second format, the time domain resource of the NR direct data channel may occupy all available symbols in one slot. That is, the time domain resources of the direct feedback channel of the second format may occupy the same symbol in a slot as the time domain resources of the NR direct data channel.

In some embodiments, the time domain resources of the direct feedback channel of the second format may be configured to be periodic. For example, on the time slots included in the resource pool for NR direct communication, one time slot for transmitting the direct feedback channel of the second format is configured every L time slots.

It should be noted that the resource pool is a logical concept, and a resource pool includes a plurality of physical resources (i.e., time domain resources and frequency domain resources), where any one of the physical resources may be used to transmit data. When a terminal device performs data transmission, a physical resource is required to be used for transmission from a resource pool. In one case, the terminal is controlled by the network device, and selects one physical resource from the resource pool for data transmission according to the indication information sent by the network device. In another case, the terminal autonomously selects one physical resource from the resource pool for data transmission.

In some embodiments, if the time slot for transmitting the direct feedback channel overlaps with a time slot included in the resource pool for LTE direct communication, the direct feedback channel is transmitted in the second format on the time slot for transmitting the direct feedback channel.

In other embodiments, the format of the direct feedback channel supported by the resource pool for NR direct communication is determined based on a configuration or pre-configuration. For example, the resource pool that may be configured or preconfigured for NR direct communication employs a second format of the direct feedback channel. Thus, the direct feedback channel is transmitted in the second format on the time slots for transmitting the direct feedback channel contained in the resource pool for NR direct communication.

In some embodiments, the frequency domain resources of one direct feedback channel of the second format occupy a plurality of subcarrier spacing (SCS). For example, the granularity of the frequency domain resources of the direct feedback channel of the second format may be at a Resource Element (RE) level, or at a Resource Block (RB) level. One RE corresponds to one SCS in the frequency domain. One RB corresponds to 12 SCS in the frequency domain.

In some embodiments, in the frequency domain, a plurality of frequency domain resources of continuous or discrete direct feedback channels may be configured. For example, taking the granularity of the frequency domain resource of the direct feedback channel in the second format as RB level as an example, a plurality of consecutive RBs may be configured for transmitting the direct feedback channel.

In some embodiments, the frequency domain resources of the direct-connect feedback channel and the frequency domain resources of the direct-connect data channel of the second format are located at different frequency domain locations over one time slot. That is, the direct feedback channel and the direct data channel of the second format are transmitted in a frequency division manner.

In some embodiments, the terminal device may determine the time-frequency resources of the direct feedback channel based on a pre-configuration or network device configuration. For example, the terminal device may receive the resource configuration information of the direct feedback channel and determine the time-frequency resource of the direct feedback channel based on the resource configuration information of the direct feedback channel. For example, the resource configuration information of the direct feedback channel may include, but is not limited to, format information of the PSFCH, identification information of the PSFCH resource pool, symbol number information of the PSFCH, and the like.

In the case where the direct-connection feedback channel adopts the second format, as shown in fig. 3, if the terminal device needs to simultaneously receive the LTE direct-connection data channel, the NR direct-connection data channel, and the direct-connection feedback channel of the second format on one time slot, since the LTE direct-connection data channel, the NR direct-connection data channel, and the direct-connection feedback channel of the second format are transmitted in a frequency division manner, on each symbol of the time slot for direct-connection communication, the terminal device can receive the same receiving power, thereby avoiding the problem of AGC of the terminal device.

Taking the case that the NR direct communication channel and the LTE direct communication channel achieve carrier coexistence as an example, the terminal device may need to send multiple direct communication channels (e.g., NR direct communication data channel, LTE direct communication data channel, direct communication feedback channel, etc.) simultaneously on one time slot. However, the terminal device has a limitation of maximum transmission power, so how to perform power allocation is a technical problem to be solved.

In order to solve the technical problem, an embodiment of the present application provides a direct communication method, as shown in fig. 4, including the following steps:

s101, selecting M second direct communication channels from N first direct communication channels to be transmitted, and determining the transmitting power of each second direct communication channel in the M second direct communication channels. The sum of the transmitting power of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N.

Optionally, the N first direct communication channels may include one or more of:

an NR direct data channel;

an LTE direct data channel;

one or more direct feedback channels;

NR straight-along with step channel; or,

LTE is straight along with the step channel.

Optionally, the direct feedback channel of the N first direct feedback channels may be a direct feedback channel adopting the second format, or may be a direct feedback channel adopting the first format, which is not limited.

Optionally, the maximum transmitting power of the terminal device is the transmitting power corresponding to the maximum transmitting capability of the terminal device; or the maximum transmitting power of the terminal equipment is the transmitting power corresponding to the terminal equipment when the DL power control is carried out, so as to avoid the interference of the signal transmission of the terminal equipment to the base station signal; or the maximum transmitting power of the terminal equipment is the transmitting power corresponding to the terminal equipment when the SL power control is carried out, so as to reduce the influence on the communication effect caused by the distance between the two terminal equipment which carry out direct communication; or the maximum transmitting power of the terminal equipment is the transmitting power corresponding to the terminal equipment when congestion power control is carried out, so as to reduce network congestion of direct-connection communication.

Alternatively, the maximum transmit power of the terminal device may be determined by a pre-configuration or a network configuration, which is not limited in the embodiments of the present application.

Optionally, the terminal device may have respective maximum transmission powers in transmitting the LTE direct communication channel and the NR direct communication channel, where the maximum transmission power of the terminal device is the maximum transmission power corresponding to the LTE direct communication channel or the maximum transmission power corresponding to the NR direct communication channel. In some examples, the maximum transmission power of the terminal device is a maximum value of a maximum transmission power corresponding to the LTE direct communication channel and a maximum transmission power corresponding to the NR direct communication channel; in other examples, the maximum transmission power of the terminal device is a minimum value of the maximum transmission power corresponding to the LTE direct communication channel and the maximum transmission power corresponding to the NR direct communication channel.

In the embodiment of the present application, the N first direct communication channels are overlapping in time domain. It should be appreciated that the overlapping of the two direct communication channels in the time domain may be a partial overlap or a full overlap. Illustratively, the two direct communication channels partially overlap in the time domain, which may mean that at least one of the symbols occupied by the two direct communication channels is overlapping. The two direct communication channels are all overlapped in the time domain, which may mean that symbols occupied by the two direct communication channels are all overlapped.

The selection manner of the M second direct communication channels is specifically described below in conjunction with different situations of the N first direct communication channels.

Case one, N first direct communication channels include one NR direct data channel (or one NR direct together with step data channel) and N ₁ A plurality of direct feedback channels N ₁ Equal to N-1. In this case, the M second direct communication channels include an NR direct data channel (or an NR direct together with a step channel) and/or N ₂ A plurality of direct feedback channels N ₂ Less than or equal to min (N) ₁ ，N _max )，N _max The maximum number of direct feedback channels transmitted simultaneously is supported for the terminal device. It should be understood that N ₂ The direct feedback channels are N ₁ Some or all of the direct feedback channels.

Hereinafter, N first direct communication channels include an NR direct data channel and N ₁ The direct feedback channels are illustrated as examples. For N first direct communication channels comprising an NR direct together with a step channel and N ₁ In the case of a direct feedback channel, the volume "NR direct data channel" may be replaced hereinafter by "NR direct together with a step channel".

In some embodiments, the transmit power of each of the M second direct communication channels is its corresponding required power. Based on this, M second direct communication channels are determined by any one of the following modes 1-1 to 1-6:

mode 1-1, at N ₁ Less than or equal to N _max And one NR is directly connected toDemand power and N of data channel ₁ In the case that the sum of the required powers of the direct-connection feedback channels is less than or equal to the maximum transmission power of the terminal device, the M second direct-connection communication channels include one of the NR direct-connection data channels and the n ₁ And directly connected feedback channels. That is, the M second direct communication channels are N first direct communication channels, where M is equal to N.

Modes 1-2, at N ₁ Less than or equal to N _max And the required power of one NR direct connection data channel and the N ₁ In the case that the sum of the required powers of the direct feedback channels is greater than the maximum transmit power of the terminal device, the M second direct communication channels include one of the NR direct data channels and the first N in the first permutation order ₂ A first direct feedback channel, the first arrangement order is the N ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

Alternatively, the terminal device may first calculate the remaining power, where the remaining power is equal to the difference between the maximum transmit power of the terminal device and the required power of the NR direct data channel. Thereafter, the terminal device may be N-based ₁ And the required power of each direct-connection feedback channel in the direct-connection feedback channels is accumulated sequentially according to the first arrangement sequence. First N in first order ₂ The sum of the required powers of +1 direct feedback channels is greater than the remaining power, and the first N in the first permutation ₂ In the case that the sum of the required powers of the direct feedback channels is less than or equal to the remaining power, the terminal device may determine N ₂ In other words, the terminal device can determine N which should be included in the M second direct communication channels ₂ And directly connected feedback channels.

For example, assume that the N first direct communication channels include 1 NR PSCCH/PSSCH and 5 PSFCHs. Wherein the required power of NR PSCCH/PSSCH is denoted as P ₀ . The 5 PSFCHs are designated as PSFCH1 to PSFCH5, and the required powers of the PSFCH1 to PSFCH5 are designated as P respectively ₁ -P ₅ . Suppose PSFCH1 to PSFCH5 are prioritized from top to bottomThe first arrangement sequence obtained by arranging the sequences is as follows: PSFCH1, PSFCH4, PSFCH3, PSFCH2, and PSFCH5. The maximum transmitting power of the terminal equipment is P _max . Let P be ₀ +P ₁ +P ₄ ≤P _max And P is ₀ +P ₁ +P ₄ +P ₃ ＞P _max Then N can be determined ₂ The specific value of (2). That is, the M second direct communication channels include NR PSCCH/PSSCH, PSFCH1 and PSFCH4.

Modes 1 to 3, at n ₁ Less than or equal to N _max And the required power of one NR direct connection data channel and the N ₁ And under the condition that the sum of the required power of the direct connection feedback channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M first direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

Optionally, the terminal device may sequentially accumulate the required power of the first direct communication channels according to the second arrangement order based on the required power of each first direct communication channel. The sum of the required powers of the first M first direct communication channels in the second arrangement sequence is smaller than or equal to the maximum transmission power of the terminal device, and the sum of the required powers of the first m+1 first direct communication channels in the second arrangement sequence is larger than the maximum transmission power of the terminal device, and the terminal device can determine a specific value of M.

For example, assume that the N first direct communication channels include 1 NR PSCCH/PSSCH and 5 PSFCHs. Wherein the required power of NR PSCCH/PSSCH is denoted as P ₀ . The 5 PSFCHs are designated as PSFCH1 to PSFCH5, and the required powers of the PSFCH1 to PSFCH5 are designated as P respectively ₁ -P ₅ . The second arrangement order obtained by arranging the N first direct communication channels from top to bottom according to the priority is as follows: PSFCH1, PSFCH4, PSFCH3, PSFCH2, PSFCH5, NR PSCCH/PSSCH. The maximum transmitting power of the terminal equipment is P _max . Let P be ₁ +P ₄ +P ₃ ≤P _max And P is ₁ +P ₄ +P ₃ +P ₂ ＞P _max A specific value of M may be determined to be 3. That is, the M second direct communication channels include PSFCH1, PSFCH4, and PSFCH3.

Modes 1 to 4, at N ₁ Greater than N _max And the required power and N of one NR direct connection data channel _max In the case that the sum of the required powers of the direct-connection feedback channels is less than or equal to the maximum transmission power of the terminal device, the M second direct-connection communication channels include one NR direct-connection data channel and N _max The direct feedback channels, i.e. N ₂ Equal to N _max . Alternatively, N _max The direct feedback channels are the first N in the first arrangement sequence _max And directly connected feedback channels.

Modes 1 to 5, at N ₁ Greater than N _max And the required power and N of one NR direct connection data channel _max In the case that the sum of the required powers of the direct-connection feedback channels is greater than the maximum transmit power of the terminal device, the M second direct-connection communication channels include one of the NR direct-connection data and the first N in the first permutation order ₂ A first direct feedback channel, the first arrangement order is the N ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

Modes 1 to 6, at N ₁ Greater than N _max And the required power and N of one NR direct connection data channel _max And under the condition that the sum of the required power of the direct connection feedback channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

In other embodiments, each of the M second direct communication channels is transmitted with the same power spectral density. That is, the transmit power of each second direct communication channel on one frequency domain unit (e.g., PRB) is the same.

Optionally, a The M second direct communication channels comprise an NR direct data channel and N ₂ In the case of a direct feedback channel, N ₂ The transmitting power of each direct feedback channel in the direct feedback channels is less than or equal to X of the maximum transmitting power of the terminal equipment ₁ X is multiple of ₁ Equal to the ratio of the bandwidth of a direct feedback channel to a first total bandwidth of N ₂ The sum of the bandwidth of a direct feedback channel and the bandwidth of an NR direct data channel.

Illustratively, the power is expressed herein in dB (decibel) values, i.e., in dBm, and the transmit power of the direct feedback channel satisfies the following relationship at one data transmission occasion occalation i:

wherein P is _PSFCH (i) For the transmit power of the direct-connect feedback channel,for the bandwidth of the NR direct data channel,for the bandwidth of the direct feedback channel, +.>Is N ₂ The bandwidths P are the bandwidths of the direct-connection feedback channels _cmax Is the maximum transmit power of the terminal device. As is known, an exponent is multiplied by a corresponding linear value. Here, a->

Optionally, the M second direct communication channels include an NR direct data channel and N ₂ NR direct connection data message under condition of direct connection feedback channelsThe transmission power of the channel is less than or equal to X of the maximum transmission power of the terminal equipment ₂ X is multiple of ₂ Equal to the ratio of the bandwidth of the NR direct data channel to a first total bandwidth, the first total bandwidth being N ₂ The sum of the bandwidth of a direct feedback channel and the bandwidth of an NR direct data channel.

Illustratively, at one data transmission occasion occasini, the transmit power of the NR direct connection data channel satisfies the following relationship:

wherein P is _PSSCH (i) For the transmit power of the NR direct data channel,bandwidth for NR direct data channel, +.>For the bandwidth of the direct feedback channel, +.>Is N ₂ The bandwidths P are the bandwidths of the direct-connection feedback channels _cmax Is the maximum transmit power of the terminal device. As is known, an exponent is multiplied by a corresponding linear value. Here, a->

Optionally, each of the M second direct communication channels is transmitted with the same power spectral density, which is suitable for use in a case where DL power control, SL power control and/or congestion control is not enabled by the terminal device.

The second case, the N first direct communication channels include one NR direct together with a step channel and one NR direct data channel.

In some embodiments, the M second direct communication channels include one NR direct together with the step channel and one NR direct data channel, in the case that the sum of the required power of the NR direct together with the step channel and the required power of the NR direct data channel is less than or equal to the maximum transmit power of the terminal device. That is, the M second direct communication channels are N first direct communication channels, where N is equal to M. Based on this, the transmit power of the NR direct link data channel is its corresponding required power. The transmission power of the NR direct and step channels is the corresponding required power.

In other embodiments, M is equal to 1 in case the sum of the required power of the NR direct with the step channel and the required power of the NR direct with the data channel is greater than the maximum transmit power of the terminal device, or in case the terminal device does not support simultaneous transmission of the NR direct with the step channel, i.e. the M second direct communication channels comprise one of the NR direct with the step channel or the NR direct data channel. Illustratively, if the priority of the NR direct with step channel is higher than the priority of the NR direct data channel, the M second direct communication channels include one NR direct with step channel; or if the priority of the NR direct and synchronous channels is lower than the priority of the NR direct data channels, the M second direct communication channels include one direct data channel; or if the priority of the NR direct and synchronous channels is equal to the priority of the NR direct data channels, determining whether the M second direct communication channels include the NR direct data channels or the NR direct and synchronous channels according to the configuration or the pre-configuration of the network device. It should be understood that in the case of using the NR direct data channel as the direct communication channel actually transmitted (i.e., the second direct communication channel), the transmission power of the NR direct data channel is the corresponding required power. In the case of an NR direct-to-step channel as the direct communication channel actually transmitted (i.e., the second direct communication channel), the transmit power of the NR direct-to-step channel is its corresponding required power.

In other embodiments, the M second direct communication channels may include one NR direct along with a step channel and one NR direct data channel. Based on this, the NR direct link data channel samples are transmitted with the same power spectral density as the NR direct link data channel samples. That is, the transmit power of the NR direct with the synchronization channel and the NR direct data channel on one frequency domain unit is the same.

Alternatively, in the case where the NR direct with step channel is transmitted with the same power spectral density as the NR direct with step channel samples, the transmit power of the NR direct with step channel is less than or equal to X of the maximum transmit power of the terminal device ₃ Multiple times. Wherein X is ₃ Is the ratio between the bandwidth of the NR direct and step channel and the second total bandwidth. Wherein the second total bandwidth is the sum of the bandwidth of the NR direct-connection data channel and the bandwidth of the NR direct-connection channel.

Illustratively, at one data transmission occasion occasini, the transmit power of the NR direct with step channel satisfies the following relationship:

wherein P is _S-SSB (i) For the transmit power of the NR direct along with the step channel,bandwidth for NR direct data channel, +.>To be the bandwidth of the direct-synchronization channel, P _cmax Is the maximum transmit power of the terminal device. As is known, an exponent is multiplied by a corresponding linear value. Here, a- >

Optionally, in the case where the NR direct link data channel is transmitted with the same power spectral density as the NR direct link data channel samples, the transmit power of the NR direct link data channel is less than or equal to X of the maximum transmit power of the terminal device ₄ Multiple times. Wherein X is ₄ Is the ratio between the bandwidth of the NR direct data channel and the second total bandwidth. Wherein the second total bandwidth is the bandwidth of the NR direct-link data channel and the bandwidth of the NR direct-link channelAnd, a method for producing the same.

wherein P is _PSSCH (i) For the transmit power of the NR direct data channel,bandwidth for NR direct data channel, +.>To be the bandwidth of the direct-synchronization channel, P _cmax Is the maximum transmit power of the terminal device. As is known, an exponent is multiplied by a corresponding linear value. Here, a->

Optionally, the NR direct and step channels and the NR direct data channels are transmitted with the same power spectral density, which is suitable for a case where the sum of the required power of the NR direct and step channels and the required power of the NR direct data channels is greater than the maximum transmit power of the terminal device, or for a case where DL power control, SL power control, and/or congestion control is not enabled by the terminal device.

The third and N first direct communication channels comprise an NR direct and synchronous channel, an NR direct data channel and N ₁ A plurality of direct feedback channels N ₁ Equal to N-2. In this case, the M second direct communication channels include one NR direct with step channel, and/or N ₂ A plurality of direct feedback channels N ₂ Less than or equal to min (N) ₁ ，N _max )，N _max The maximum number of direct feedback channels transmitted simultaneously is supported for the terminal device. It should be understood that N ₂ The direct feedback channels are N ₁ Part or all of the direct feedback channelsA channel.

mode 1-1, at N ₁ Less than or equal to N _max And one NR directly connects the required power of the data channel, one NR directly connects the required power of the step channel, N ₁ The M second direct communication channels comprise one NR direct communication data channel, one NR direct communication channel and one N direct communication channel under the condition that the sum of the required power of the three direct communication feedback channels is smaller than or equal to the maximum transmitting power of the terminal equipment ₁ And directly connected feedback channels. That is, the M second direct communication channels are N first direct communication channels, where M is equal to N.

Modes 1-2, at N ₁ Less than or equal to N _max And under the condition that the sum of the required power of the above three is greater than the maximum transmitting power of the equipment, the M second direct communication channels comprise firstly transmitting one NR direct communication data channel and one NR direct connection synchronous channel according to the priority order, and if the power is remained, according to the first N in the first arrangement order ₂ A first direct feedback channel, the first arrangement order is the N ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

Alternatively, the terminal device may first calculate the remaining power, where the remaining power is equal to the difference between the maximum transmit power of the terminal device and the required power of the NR direct link data channel and the NR direct link channel required power. Thereafter, the terminal device may be N-based ₁ And the required power of each direct-connection feedback channel in the direct-connection feedback channels is accumulated sequentially according to the first arrangement sequence. First N in first order ₂ The sum of the required powers of +1 direct feedback channels is greater than the remaining power, and the first N in the first permutation ₂ In the case that the sum of the required powers of the direct feedback channels is less than or equal to the remaining power, the terminal device may determine N ₂ In other words, the terminal device can determine N which should be included in the M second direct communication channels ₂ And directly connected feedback channels.

Modes 1 to 3, at N ₁ Less than or equal to N _max And under the condition that the sum of the required power of the three is greater than the maximum transmitting power of the terminal equipment, the M second direct communication channels comprise the first M first direct communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct communication channels according to the order from high priority to low priority.

Modes 1 to 4, at N ₁ Greater than N _max Under the condition that the sum of the three required powers is smaller than or equal to the maximum transmitting power of the terminal equipment, the M second direct communication channels comprise one NR direct communication data channel, one NR direct communication channel and N direct communication data channels _max The direct feedback channels, i.e. N ₂ Equal to N _max . Alternatively, N _max The direct feedback channels are the first N in the first arrangement sequence _max And directly connected feedback channels.

Modes 1 to 5, at N ₁ Greater than N _max And when the sum of the three required powers is greater than the maximum transmission power of the terminal device, the M second direct communication channels include transmitting one or two of the NR direct communication data and the NR direct communication channel according to the priority order of the NR direct communication data and the NR direct communication channel, and if there is power remaining, continuing to transmit the first N in the first permutation order ₂ A first direct feedback channel, the first arrangement order is thatN ₁ The direct feedback channels are arranged according to the order of the priority from high to low.

Modes 1 to 6, at N ₁ Greater than N _max And under the condition that the sum of the required power of the three is greater than the maximum transmitting power of the terminal equipment, the M second direct communication channels comprise the first M direct communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct communication channels according to the order from high priority to low priority.

Optionally, the M second direct communication channels include an NR direct data channel, a synchronization channel and N ₂ In the case of a direct feedback channel, N ₂ The transmitting power of each direct feedback channel in the direct feedback channels is less than or equal to X of the maximum transmitting power of the terminal equipment ₁ X is multiple of ₁ Equal to the ratio of the bandwidth of a direct feedback channel to a first total bandwidth of N ₂ The bandwidth of a direct-connection feedback channel, the bandwidth of an NR direct-connection data channel, the bandwidth of an NR direct-connection synchronous channel, and the sum of the three. The transmission power of the NR direct data channel is less than or equal to X of the maximum transmission power of the terminal device ₂ X is multiple of ₂ Equal to the ratio of the bandwidth of the NR direct data channel to the first total bandwidth. The transmission power of the NR direct and step channels is less than or equal to X of the maximum transmission power of the terminal device ₃ X is multiple of ₃ Equal to the ratio of the bandwidth of the NR direct and step channel to the first total bandwidth

The following describes different types of calculation modes of the required power of the first direct communication channel.

(1) Demand power of direct-connected feedback channel

In some examples, if downstream-based PSFCH power control is enabled, i.e., downstream power control parameters (dl-P0-PSFCH) are preconfigured within the terminal device or configured by the network device, then the required power of the PSFCH satisfies the following relationship:

P _PSFCH，one ＝P _O，PSFCH +10log ₁₀ (2 ^μ )+α _PSFCH ·PL

wherein P is _PSFCH，one For PSFCH required power on one PRB, P _O，PSFCH For desired received PSFCH power or power density, alpha is indicated by a configured or preconfigured dl-P0-PSFCH parameter _PSFCH This value is equal to 1 when indicated by a configured or preconfigured power control parameter dl-Alpha-PSFCH or when not configured, μ being the currently used subcarrier spacing (SCS, subcarrier spacing), PL being the path loss measured based on a Reference Signal (RS). The configuration or pre-configuration refers to the configuration by the network device down signaling or the pre-configuration by the terminal device, and will not be described in detail below.

In other examples, the required power P of a PSFCH is preconfigured or configured by a network device _PSFCH，one The method comprises the steps of carrying out a first treatment on the surface of the For example, the absolute value power of the PSFCH may be preconfigured or configured by the network device, and the relative value power of the PSFCH may also be configured, for example, to be X times the maximum power. Optionally, X is a rational number less than 1. Illustratively, the required power of the PSFCH satisfies the following relationship:

P _PSFCH，one ＝P _cmax +10log ₁₀ (X)

wherein P is _PSFCH，one For PSFCH required power on one PRB, P _cmax For UE maximum transmit power, X is a constant.

In still other examples, if the number of physical resource blocks occupied by one PSFCH isThe process is thatThe required power of the PSFCH can be expressed as:

wherein,the number of PRBs occupied by one PSFCH.

(2) Demand power for direct-connect data channels

In some examples, if PSCCH/PSSCH power control based on downlink and/or direct communication is enabled, i.e., the downlink power control parameter dl-P0-PSSCH-PSCCH and/or the direct communication power control parameter sl-P0-PSSCH-PSCCH are preconfigured or configured by the network device, then at one data transmission occasion occasin i, the PSCCH/PSSCH required power satisfies the following relationship:

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

wherein P is _PSSCH (i) The power required for PSCCH/PSSCH; p (P) _CMAX For the maximum transmit power of the UE, P _MAX，CBR Maximum transmit power under congestion control-based power requirements, i.e., maximum power determined based on current channel occupancy channel busy rate (channel busy ratio, CBR) and PSSCH priority; p (P) _PSSCH，D (i) A required power determined based on the downlink power control; p (P) _PSSCH，SL (i) Is the required power determined based on SL power control.

For one PRB in PSSCH, PSCCH/PSSCH required power satisfies the following relationship:

wherein,the number of PRBs occupied for PSSCH.

In other examples, the required power P of one PRB of one PSSCH is preconfigured or configured by the network device _PSSCH，one The method comprises the steps of carrying out a first treatment on the surface of the For example, the absolute value power of the PSSCH may be preconfigured or configured by the network device, or the relative value power of the PSSCH may be configured, for example, to be Y times the maximum power. Optionally, Y is a rational number less than 1. Illustratively, the required power of the PSSCH satisfies the following relationship:

P _PSSCH，one ＝P _cmax +10log ₁₀ (Y)

wherein P is _PSSCH，one For PSSCH power demand on one PRB, P _cmax For UE maximum transmit power, Y is a constant.

In some examples, on one data transmission occasion occasini, one PSSCH required power satisfies the following relationship:

wherein P is _PSSCH (i) Power is required for PSCCH/PSSCH; p (P) _PSSCH，one The required power of one PRB for the PSSCH; The number of PRBs occupied for PSSCH.

(3) Required power of direct-coupled step channel

In some examples, if downlink-based synchronization signal power control is enabled, the downlink power control parameters dl-P0-PSBCH are pre-configured or configured by the network device. The SL synchronization required power satisfies the following relationship:

wherein P is _O，S-SSB Indicated by dl-P0-PSBCH, alpha _S-SSB Indicated by dl-Alpha-PSBCH or equal to 1, mu is determined by the currently used subcarrier spacing (SCS, subcarrier spacing), PL is based on a reference signalThe number of path loss measured is given by,and the number of PRBs occupied by the synchronous signals is the number of PRBs occupied by the synchronous signals.

For one PRB in the PSBCH, the PSBCH required power satisfies the following relationship:

wherein,the number of PRBs occupied for the synchronization signal.

In some embodiments, different types of direct communication channels may have different power spectral densities. That is, the transmit power of different types of direct communication channels on one PRB is different. For example, P _PSSCH，one 、P _S-SSB，one P _PSSCH，one May have different values.

In other embodiments, different types of direct communication channels may have the same power spectral density. That is, the transmission power of different types of direct communication channels on one PRB is the same and can be equal to P _SL，one 。

In some examples, P _SL，one Equal to P determined according to the above embodiment _PSSCH，one 、P _SSB，one Or P _PSSCH，one 。

In other examples, P _SL，one Can be by P _PSSCH，one 、P _S-SSB，one P _PSSCH，one And (3) carrying out preset treatment on one or more of the above materials. The preset processing may be minimum number, maximum number, averaging, etc., which is not limited. For example, P _SL，one May be P _PSSCH，one And P _PSSCH，one Either the maximum or the minimum of (a) is used. Also e.g. P _SL，one May be P _PSSCH，one And P _PSSCH，one Average of (2)Values.

In some embodiments, since the transmission capability of the terminal device is limited, the transmission capability of the terminal device needs to be considered when selecting M second direct communication channels from the N first direct communication channels. In this way, the selected M second direct communication channels can meet the limitation requirement of the transmitting capability of the terminal device. In other words, the transmitting capability of the terminal device supports the transmission of M second direct communication channels.

Wherein the transmitting capability of the terminal device may be determined by a pre-configuration or a network configuration. Alternatively, the transmission capability of the terminal device may be related to the maximum transmission power of the terminal device, the number of transmission antennas, and the like, which is not limited.

In some embodiments, the M second direct communication channels are the first M first direct communication channels in the third permutation. The third arrangement sequence is obtained by arranging N first direct communication channels.

As an example, the third ranking order is obtained by ranking the N first direct communication channels based on the priorities of the respective first direct communication channels. Wherein the first direct communication channel with the higher priority is located before the first direct communication channel with the lower priority in the third arrangement order.

As another example, the third ranking order is obtained by ranking the N first direct communication channels based on the priority and/or transmission level of each first direct communication channel. Wherein the first direct communication channel with the higher transmission level is located before the first direct communication channel with the lower transmission level in the third arrangement sequence. And, for two first direct communication channels having the same transmission rank, the first direct communication channel having a high priority is located before the first direct communication channel having a low priority in the third arrangement order.

Alternatively, the transmission level may be related to the type of direct communication channel, the communication system, the carried content, and the like. Based on this, the transmission rank may, for example, satisfy one or more of the following rules:

rule 1-1, the transmission level of the direct-connection data channel is higher than that of the direct-connection data channel;

Rule 1-2, the transmission level of the direct connection data channel is higher than that of the direct connection feedback channel;

rule 1-3, the transmission level of the direct feedback channel used for carrying the hybrid automatic repeat request response information is higher than the transmission level of the direct feedback channel used for carrying the conflict indication;

rules 1-4, NR direct communication channels have a higher or lower reception level than LTE direct communication channels.

It should be appreciated that the rules to which the transmission level applies, and the order of preference between the various rules, may be determined by network device configuration or pre-configuration.

For example, assuming that the transmission level satisfies rule 1-1, rule 1-2 and rule 1-4 (the transmission level of the NR direct communication channel is higher than that of the LTE direct communication channel), and rule 1-4 is prioritized over rule 1-1 and rule 1-2, the various types of direct communication channels are sequentially in order of transmission level from top to bottom: NR direct with the step channel, NR direct with the data channel, direct with the feedback channel, LTE direct with the step channel, LTE direct with the data channel.

For example, assuming that the transmission level satisfies rule 1-1, rule 1-2 and rule 1-4 (the transmission level of the NR direct communication channel is higher than that of the LTE direct communication channel), and rule 1-1 and rule 1-2 take precedence over rule 1-4, the various types of direct communication channels are in order of transmission level from top to bottom: NR direct with the step channel, LTE direct with the step channel, NR direct with the data channel, LTE direct with the data channel, direct with the feedback channel.

For example, assuming that the transmission level satisfies rule 1-1, rule 1-2 and rule 1-4 (the transmission level of the NR direct communication channel is lower than that of the LTE direct communication channel), and rule 1-4 is prioritized over rule 1-1 and rule 1-2, the various types of direct communication channels are in order of transmission level from top to bottom: LTE direct with the step channel, LTE direct with the data channel, NR direct with the step channel, NR direct with the data channel, direct with the feedback channel.

For example, assuming that the transmission level satisfies rule 1-1, rule 1-2 and rule 1-4 (the transmission level of the NR direct communication channel is lower than that of the LTE direct communication channel), and rule 1-1 and rule 1-2 take precedence over rule 1-4, the various types of direct communication channels are in order of transmission level from top to bottom: LTE direct with the step channel, NR direct with the step channel, LTE direct with the data channel, NR direct with the data channel, direct with the feedback channel.

Alternatively, in rules 1-4, the order of the transmission level of the NR direct communication channel and the transmission level of the LTE direct communication channel may be determined based on a network configuration or a pre-configuration.

Alternatively, in rule 1-4, the order of the transmission level of the NR direct communication channel and the transmission level of the LTE direct communication channel may be determined based on the actual situation of the N first direct communication channels to be transmitted. For example, in the case that the N first direct communication channels to be transmitted include at least one NR direct communication channel to be transmitted and at least one LTE direct communication channel to be transmitted, if the first priority is higher than or equal to the second priority, the transmission level of the NR direct communication channel to be transmitted is higher than the transmission level of the LTE direct communication channel to be transmitted; or if the first priority is lower than the second priority, the transmission level of the NR direct communication channel to be transmitted is lower than the transmission level of the LTE direct communication channel to be transmitted; the first priority is the highest priority among the priorities of all the NR direct communication channels to be transmitted, and the second priority is the highest priority among the priorities of all the LTE direct communication channels to be transmitted.

In some embodiments, the terminal device may be restricted to only transmit one type of direct communication channel at a time. That is, the M second direct communication channels belong to the same type of direct communication channel. Based on this, M second direct communication channels may be selected from the N first direct communication channels, ordered by a preset type. The preset type ordering is as follows: NR direct data channel, LTE direct data channel, NR direct with step channel, LTE direct with step channel, and direct feedback channel.

S102, transmitting M second direct communication channels based on the transmitting power of each of the M second direct communication channels.

In step S102, for each of the M second direct communication channels, the second direct communication channel is transmitted with the transmission power of the second direct communication channel.

In the technical scheme provided by the embodiment of the application, when the direct communication is performed, the power control is performed on the transmitting power of the direct communication channel, so that the sum of the power of the direct communication channel (for example, the sum of the transmitting powers of the M second direct communication channels) which is actually transmitted is ensured to be smaller than the maximum transmitting power of the terminal equipment, and further, the communication quality is improved, and the energy loss is reduced.

Taking the case that the NR direct communication channel and the LTE direct communication channel achieve carrier coexistence as an example, the terminal device may need to receive multiple direct communication channels (e.g., NR direct communication data channel, LTE direct communication data channel, direct communication feedback channel, etc.) simultaneously on one time slot. However, the receiving capability of the terminal device is limited, so how the terminal device receives the direct communication channels is a technical problem to be solved in the case that the plurality of direct communication channels to be received exceeds the receiving capability of the terminal device.

In order to solve the technical problem, the embodiment of the present application further provides a direct communication method, as shown in fig. 5, including the following steps:

s201, selecting K fourth direct communication channels from P third direct communication channels to be received.

Wherein, the receiving capability of the terminal equipment supports receiving K fourth direct communication channels. P is a positive integer, and K is a positive integer less than or equal to P.

Optionally, the P third direct communication channels include one or more of:

one or more NR direct data channels;

one or more LTE-direct data channels;

one or more direct feedback channels;

LTE direct with step channel; or,

NR is a direct channel together with a step channel.

Optionally, the direct feedback channel of the P third direct feedback channels may be a direct feedback channel adopting the second format, or may be a direct feedback channel adopting the first format, which is not limited.

In the embodiment of the present application, the P third direct communication channels are overlapping in time domain. It should be appreciated that the overlapping of the two direct communication channels in the time domain may be a partial overlap or a full overlap. Illustratively, the two direct communication channels partially overlap in the time domain, which may mean that at least one of the symbols occupied by the two direct communication channels is overlapping. The two direct communication channels are all overlapped in the time domain, which may mean that symbols occupied by the two direct communication channels are all overlapped.

In some embodiments, in a case where the receiving capability of the terminal device can support receiving P third direct communication channels, the P third direct communication channels are all used as fourth direct communication channels. And if the receiving capability of the terminal equipment cannot support the reception of the P third direct communication channels, selecting part of the direct communication channels from the P third direct communication channels as fourth direct communication channels on the premise of not exceeding the receiving capability of the terminal equipment.

Wherein the receiving capability of the terminal device is related to the baseband processing capability, antenna configuration, etc. of the terminal device. The receiving capability of the terminal device may be determined by a pre-configuration or a network device configuration, which is not limited. In the embodiment of the application, the receiving capability of the terminal may be embodied in the maximum number of direct communication channels received simultaneously.

In some embodiments, the K fourth direct communication channels are the first K third direct communication channels in the fourth permutation. The fourth arrangement sequence is obtained by arranging P third direct communication channels.

As an example, the fourth ranking order is obtained by ranking the P third direct communication channels based on the priorities of the respective third direct communication channels. Wherein the third direct communication channel with the higher priority is located before the third direct communication channel with the lower priority in the fourth arrangement order.

As another example, the fourth ranking order is obtained by ranking the P third direct communication channels based on the reception level and priority of each third direct communication channel. Wherein the third direct communication channel with the higher receiving level is located before the third direct communication channel with the lower receiving level in the fourth arrangement sequence. And, for two third direct communication channels having the same reception level, the third direct communication channel having the higher priority is located before the third direct communication channel having the lower priority in the fourth arrangement order.

Alternatively, the reception level may be related to the type of direct communication channel, the communication system, the carried content, and the like. Based on this, the reception level may, for example, satisfy one or more of the following rules:

rule 2-1, the receiving level of the direct-connection data channel is higher than that of the direct-connection data channel;

rule 2-2, the receiving level of the direct connection data channel is higher than that of the direct connection feedback channel;

rule 2-3, the receiving level of the direct feedback channel used for carrying the hybrid automatic repeat request response information is higher than the receiving level of the direct feedback channel used for carrying the conflict indication;

rule 2-4, NR direct communication channel reception level is higher or lower than LTE direct communication channel reception level.

It should be appreciated that the rules to which the reception level applies, and the order of preference between the various rules, may be determined by network device configuration or pre-configuration.

For example, assuming that the reception level satisfies rule 2-1, rule 2-2 and rule 2-4 (the reception level of the NR direct communication channel is higher than that of the LTE direct communication channel), and rule 2-4 is prioritized over rule 2-1 and rule 2-2, the various types of direct communication channels are in order of the reception level from top to bottom: NR direct with the step channel, NR direct with the data channel, direct with the feedback channel, LTE direct with the step channel, LTE direct with the data channel.

For example, assuming that the reception level satisfies rule 2-1, rule 2-2 and rule 2-4 (the reception level of the NR direct communication channel is higher than that of the LTE direct communication channel), and rule 2-1 and rule 2-2 take precedence over rule 2-4, the various types of direct communication channels are in order of the reception level from top to bottom: NR direct with the step channel, LTE direct with the step channel, NR direct with the data channel, LTE direct with the data channel, direct with the feedback channel.

For example, assuming that the reception level satisfies rule 2-1, rule 2-2 and rule 2-4 (the reception level of the NR direct communication channel is lower than that of the LTE direct communication channel), and rule 2-4 is prioritized over rule 2-1 and rule 2-2, the various types of direct communication channels are in order of the reception level from high to low: LTE direct with the step channel, LTE direct with the data channel, NR direct with the step channel, NR direct with the data channel, direct with the feedback channel.

For example, assuming that the reception level satisfies rule 2-1, rule 2-2 and rule 2-4 (the reception level of the NR direct communication channel is lower than that of the LTE direct communication channel), and rule 2-1 and rule 2-2 take precedence over rule 2-4, the various types of direct communication channels are in order of the reception level from top to bottom: LTE direct with the step channel, NR direct with the step channel, LTE direct with the data channel, NR direct with the data channel, direct with the feedback channel.

Alternatively, in rule 2-4, the order of the reception level of the NR direct communication channel and the reception level of the LTE direct communication channel may be determined based on the network configuration or the pre-configuration.

Alternatively, in rule 2-4, the order of the reception level of the NR direct communication channel and the reception level of the LTE direct communication channel may be determined based on the actual situation of the P third direct communication channels to be received. For example, in the case that the P third direct communication channels to be received include at least one NR direct communication channel to be received and at least one LTE direct communication channel to be received, if the third priority is higher than or equal to the fourth priority, the reception level of the NR direct communication channel to be received is higher than the reception level of the LTE direct communication channel to be received; or if the third priority is lower than the fourth priority, the receiving level of the NR direct communication channel to be received is lower than the receiving level of the LTE direct communication channel to be received; the third priority is the highest priority among the priorities of all the NR direct communication channels to be received, and the fourth priority is the highest priority among the priorities of all the LTE direct communication channels to be received.

S202, K fourth direct communication channels are received.

According to the technical scheme provided by the embodiment of the application, under the condition that P direct communication channels to be received overlap in the time domain, K fourth direct communication channels which can be supported by the receiving capability of the terminal equipment are selected to be received by considering the receiving capability of the terminal equipment, so that the terminal equipment can normally perform direct communication.

In the case where the NR direct communication channel and the LTE direct communication channel achieve carrier coexistence, the terminal device may need to perform an operation of receiving the NR direct communication channel, an operation of transmitting the NR direct communication channel, an operation of receiving the LTE direct communication channel, and/or an operation of transmitting the LTE direct communication channel at the same time. However, some terminal apparatuses have a limitation of half duplex, that is, they cannot perform a receiving operation and a transmitting operation at the same time. Therefore, for the terminal device having the half duplex limitation, consideration needs to be given to how to solve the problem that the direct communication channel to be received and the direct communication channel to be transmitted collide in the time domain.

In order to solve the technical problem, the embodiment of the present application further provides a direct communication method, as shown in fig. 6, including the following steps:

S301, if N first direct communication channels to be sent and P third direct communication channels to be received overlap in time domain, acquiring receiving priority and sending priority.

Wherein the reception priority is used to characterize the priority of performing the reception operation. The transmission priority is used to characterize the priority of performing the transmission operation.

In some embodiments, the received priority is the highest priority among the priorities of the N first direct communication channels. The sending priority is the highest priority among the priorities of the P third direct communication channels; alternatively, the transmission priority is the highest priority among the priorities of part of the P third direct communication channels (e.g., direct communication channels of the target type). Alternatively, the target type may include one or more of a direct feedback channel, an LTE direct data channel, an NR direct with a step channel, or an LTE direct with a step channel. It should be noted that, the reason why the target type does not include the NR direct connection data channel is that the transmitting end generally does not periodically transmit the NR direct connection data channel, so it is difficult for the receiving end to predict the receiving opportunity of the NR direct connection data channel, and therefore it is inconvenient to consider the priority of the NR direct connection data channel to be received in the process of determining the receiving priority.

In still other embodiments, N first direct communication channels to be transmitted and P third direct communication channels to be received may be divided into, from a communication system: at least one LTE direct communication channel to be transmitted and at least one NR direct communication channel to be transmitted. Based on this, when the NR priority is higher than or equal to the LTE priority, the reception priority is the highest priority among the priorities of all the NR direct communication channels to be received in the at least one NR direct communication channel to be transmitted, and the transmission priority is the highest priority among the priorities of all the NR direct communication channels to be transmitted in the at least one NR direct communication channel to be transmitted. Or under the condition that the NR priority is lower than the LTE priority, the receiving priority is the highest priority in the priorities of all LTE direct communication channels to be received in at least one LTE direct communication channel to be transmitted, and the sending priority is the highest priority in the priorities of all LTE direct communication channels to be sent in at least one LTE direct communication channel to be transmitted. Wherein the NR priority may be the highest priority among the priorities of the at least one NR direct communication channel to be transmitted. The LTE priority may be the highest priority among the priorities of the at least one LTE direct communication channel to be transmitted.

It should be understood that the foregoing description of the manner of determining the reception priority and the transmission priority is merely exemplary, and the reception priority and the transmission priority may be determined by other manners, which are not limited in this embodiment of the present application.

Illustratively, the priority of the direct communication channel may be a proximity services per packet priority (proSe per packet priority, PPPP). The priority of the direct communication channel may be characterized by a priority value. There is a negative correlation between the priority value and the priority, i.e. a smaller priority value indicates a higher priority. Alternatively, the priorities of the different types of direct communication channels may be determined by:

the priority of an NR direct data channel is indicated by information in its corresponding side uplink control information (sidelink control information, SCI);

the priority of an LTE-direct data channel is indicated by information in its corresponding SCI;

the priority of the NR synchronization signal is determined by pre-configuration or network device configuration;

the priority of the LTE synchronization signal is determined through pre-configuration or network equipment configuration;

the priority of the direct feedback channel is determined by the priority of its corresponding NR direct data channel.

Alternatively, for a group of direct feedback channels to be received or to be transmitted, the group priority of the group of direct feedback channels may be equal to the highest priority of the priorities of all direct feedback channels in the group.

S302, based on the comparison result of the receiving priority and the sending priority, the receiving operation or the sending operation is determined to be executed.

As a possible implementation manner, in a case where the reception priority is higher than the transmission priority, it is determined to perform the reception operation; or, in the case where the reception priority is lower than the transmission priority, determining to perform the transmission operation; or, in the case where the reception priority is equal to the transmission priority, it is determined to perform the reception operation or to perform the transmission operation.

It should be appreciated that where the reception priority is equal to the transmission priority, whether the reception operation or the transmission operation is specifically performed may be determined according to a pre-configuration or a network configuration.

In some embodiments, when the receiving operation is selected to be performed, the time of sending the N first direct communication channels may be advanced or delayed, so as to ensure that the terminal device performs the direct communication normally.

In some embodiments, performing the sending operation may be implemented with reference to steps S101-S102 in the previous embodiments.

In some embodiments, performing the receiving operation may be implemented with reference to steps S201-S202 in the previous embodiments.

According to the technical scheme provided by the embodiment of the application, the problem that the direct communication channel to be sent and the direct communication channel to be received collide in the time domain can be reasonably solved under the condition that the terminal equipment has half-duplex limitation, so that the priority transmission of the important direct communication channel is ensured.

It should be understood that if there are only direct communication channels to be transmitted in one time domain unit (e.g., time slot), the terminal device performs a transmission operation; or if only the direct communication channel to be received exists in one time domain unit, the terminal equipment executes the receiving operation.

It can be seen that the foregoing description of the solution provided by the embodiments of the present application has been presented mainly from a method perspective. To achieve the above-mentioned functions, embodiments of the present application provide corresponding hardware structures and/or software modules that perform the respective functions. Those of skill in the art will readily appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

As shown in fig. 7, the embodiment of the present application provides a direct communication device for performing the direct communication method shown in fig. 4 to 6. The direct communication device 300 includes: a processing module 301 and a transmitting module 302.

The processing module 301 is configured to select M second direct communication channels from N first direct communication channels to be received, and determine a transmission power of each second direct communication channel of the M second direct communication channels, where a sum of the transmission powers of the M second direct communication channels is less than or equal to a maximum transmission power of the terminal device, N is a positive integer, and M is a positive integer less than or equal to N.

The transmitting module 302 is configured to transmit the M second direct communication channels based on the transmission power of each of the M second direct communication channels.

In some embodiments, at M second direct connectionsThe communication channels include NR direct data channels and N ₂ In the case of a direct feedback channel, N ₂ The transmitting power of each direct feedback channel in the direct feedback channels is less than or equal to X of the maximum transmitting power of the terminal equipment ₁ X is multiple of ₁ Equal to the ratio of the bandwidth of a direct feedback channel to a first total bandwidth of N ₂ The sum of the bandwidth of the individual direct feedback channels and the bandwidth of the NR direct data channels.

In some embodiments, the processing module 301 is further configured to obtain a reception priority and a transmission priority when a plurality of direct communication channels overlap in a time domain; the plurality of direct communication channels comprise N first direct communication channels to be sent and P third direct communication channels to be received, wherein P is a positive integer; based on the comparison result of the reception priority and the transmission priority, it is determined to perform the reception operation or to perform the transmission operation.

In some embodiments, the processing module 301 is specifically configured to determine to perform the sending operation if the sending priority is higher than the receiving priority; or if the sending priority is lower than the receiving priority, determining to execute the receiving operation; or if the transmission priority is equal to the reception priority, determining to execute the transmission operation or the reception operation.

In some embodiments, the processing module 301 is further configured to select K fourth direct communication channels from the P third direct communication channels after determining to perform the receiving operation, where K is a positive integer less than or equal to P; k fourth direct communication channels are received.

It should be noted that the division of the modules in fig. 7 is schematic, and is merely a logic function division, and other division manners may be implemented in practice. For example, two or more functions may also be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules.

In the case of implementing the functions of the integrated modules in the form of hardware, the embodiments of the present application provide another possible structural schematic diagram of the direct communication device referred to in the above embodiments. As shown in fig. 8, the direct communication device 400 includes: processor 402, bus 404. Optionally, the direct communication device may further comprise a memory 401; optionally, the direct communication device may further comprise a communication interface 403.

The processor 402 may be any logic block, module, and circuitry that implements or performs the various examples described in connection with the present disclosure. The processor 402 may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. Processor 402 may also be a combination that implements computing functionality, e.g., comprising one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

A communication interface 403 for connecting with other devices via a communication network. The communication network may be an ethernet, a radio access network, a wireless local area network (wireless local area networks, WLAN), etc.

The memory 401 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), magnetic disk storage or other magnetic storage device, or 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.

As a possible implementation, the memory 401 may exist separately from the processor 402, and the memory 401 may be connected to the processor 402 by a bus 404, for storing instructions or program codes. The processor 402, when calling and executing instructions or program code stored in the memory 401, is capable of implementing the direct communication method provided in the embodiments of the present application.

In another possible implementation, the memory 401 may also be integrated with the processor 402.

Bus 404, which may be an extended industry standard architecture (extended industry standard architecture, EISA) bus, or the like. The bus 404 may be classified as an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in fig. 8, but not only one bus or one type of bus.

It will be apparent to those skilled in the art from this description that, for convenience and brevity of description, only the above-described division of the functional modules is illustrated, and in practical application, the above-described functional allocation may be performed by different functional modules according to needs, i.e. the internal structure of the direct communication device is divided into different functional modules to perform all or part of the above-described functions.

Embodiments of the present application also provide a computer-readable storage medium. All or part of the flow in the above method embodiments may be implemented by computer instructions to instruct related hardware, and the program may be stored in the above computer readable storage medium, and the program may include the flow in the above method embodiments when executed. The computer readable storage medium may be any of the foregoing embodiments or memory. The computer readable storage medium may be the external storage device based on the direct communication apparatus, for example, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash card (flash card) or the like. Further, the computer readable storage medium may further include both the internal storage unit and the external storage device of the direct communication apparatus. The computer readable storage medium is used for storing the computer program and other programs and data required by the direct communication device. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.

Embodiments of the present application also provide a computer program product comprising a computer program which, when run on a computer, causes the computer to perform any of the direct communication methods provided in the embodiments described above.

Although the present application has been described herein in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the figures, the disclosure, and the appended claims. In the claims, the word "Comprising" does not exclude other elements or steps, and the "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

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

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of direct communication, the method comprising:

selecting M second direct communication channels from N first direct communication channels to be received, and determining the transmitting power of each second direct communication channel in the M second direct communication channels, wherein the sum of the transmitting powers of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N;

and transmitting the M second direct communication channels based on the transmission power of each second direct communication channel in the M second direct communication channels.

2. The method of claim 1, wherein if said N first direct communication channels include a new air interface NR direct communication data channel and N ₁ A plurality of direct feedback channels, the M second direct communication channels including the NR direct data channels and/or N ₂ A plurality of direct feedback channels; wherein N is ₁ Equal to N-1, N ₂ Less than or equal to min (N) ₁ ，N _max )，N _max And supporting the maximum number of the direct feedback channels transmitted simultaneously for the terminal equipment.

3. The method of claim 2, wherein the transmit power of each of the M second direct communication channels is equal to its corresponding required power.

4. The method of claim 3, wherein the step of,

at N ₁ Less than or equal to N _max And the N is ₁ In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is less than or equal to the maximum transmission power of the terminal device, the M second direct-connection communication channels include the NR direct-connection data channels and the N ₁ A plurality of direct feedback channels; or,

at N ₁ Less than or equal to N _max And the N is ₁ In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is greater than the maximum transmission power of the terminal device, the M second direct-connection communication channels include the NR direct-connection data and the first N in the first permutation order ₂ A first direct feedback channel, the first arrangement order is the N ₁ The direct connection feedback channels are arranged according to the order of priority from high to low to obtain an arrangement order; or,

At N ₁ Less than or equal to N _max And the N is ₁ Under the condition that the sum of the required power of the direct connection feedback channels and the required power of the NR direct connection data channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise first M direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low; or,

at N ₁ Greater than N _max And N _max In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is less than or equal to the maximum transmission power of the terminal device, the M second direct-connection communication channels include one of the NR direct-connection data channels and N _max A plurality of direct feedback channels; or,

at N ₁ Greater than N _max And N _max In the case that the sum of the required power of the direct-connection feedback channels and the required power of the NR direct-connection data channels is greater than the maximum transmission power of the terminal device, the M second direct-connection communication channels include the NR direct-connection data channels and the first N in the first permutation order ₂ A first direct feedback channel, the first arrangement order is the N ₁ The direct connection feedback channels are arranged according to the order of priority from high to low to obtain an arrangement order; or,

at N ₁ Greater than N _max And the required power and N of one NR direct connection data channel _max And under the condition that the sum of the required power of the direct connection feedback channels is larger than the maximum transmitting power of the terminal equipment, the M second direct connection communication channels comprise the first M first direct connection communication channels in a second arrangement sequence, and the second arrangement sequence is an arrangement sequence obtained by arranging the N first direct connection communication channels according to the order of priority from high to low.

5. The method of claim 2, wherein each of the M second direct communication channels is transmitted with the same power spectral density.

6. The method of claim 5 wherein said M second direct communication channels comprise said NR direct data channels and N ₂ In the case of a direct feedback channel, the N ₂ The transmitting power of each direct feedback channel in the direct feedback channels is less than or equal to X of the maximum transmitting power of the terminal equipment ₁ X is multiple of ₁ Equal to oneThe ratio of the bandwidth of the direct feedback channel to a first total bandwidth, the first total bandwidth being the N ₂ And the sum of the bandwidths of the direct-connection feedback channels and the bandwidths of the NR direct-connection data channels.

7. The method of claim 6, wherein the transmit power of the direct data channel is less than or equal to X of the maximum transmit power of the terminal device ₂ X is multiple of ₂ Equal to the ratio of the bandwidth of the direct data channel to the first total bandwidth.

8. The method according to any of claims 1 to 7, wherein the transmission capability of the terminal device supports the transmission of the M second direct communication channels.

9. The method of claim 8, wherein if the receiving capability of the terminal device does not support receiving the N first direct communication channels, the M second direct communication channels are first M first direct communication channels in a third permutation, where the third permutation is obtained by permutation of the N first direct communication channels, without exceeding the receiving capability of the terminal device.

10. The method of claim 9, wherein the third ranking is based on the priority of each first direct communication channel, the N first direct communication channels being ranked; wherein the first direct communication channel with high priority is located before the first direct communication channel with low priority in the third arrangement order.

11. The method of claim 9, wherein the third ranking is obtained by ranking the N first direct communication channels based on a priority and a transmission level of each first direct communication channel; wherein, the first direct communication channel with high transmission level is located before the first direct communication channel with low transmission level in the third arrangement sequence; and, for two first direct communication channels having the same transmission rank, the first direct communication channel having a high priority is located before the first direct communication channel having a low priority in the third ranking order.

12. The method of claim 11, wherein the transmission level satisfies one or more of the following rules:

the transmission level of the direct-connection data channel is higher than that of the direct-connection data channel;

the transmission grade of the direct connection data channel is higher than that of the direct connection feedback channel;

the transmission level of the NR direct communication channel is higher or lower than that of the LTE direct communication channel; or,

the transmission level of the direct feedback channel for carrying the hybrid automatic repeat request response information is higher than the transmission level of the direct feedback channel for carrying the collision indication.

13. The method according to claim 1, wherein the method further comprises:

under the condition that a plurality of direct communication channels overlap in time domain, acquiring a receiving priority and a sending priority; the plurality of direct communication channels comprise N first direct communication channels to be sent and P third direct communication channels to be received, wherein P is a positive integer;

and determining to execute a receiving operation or a transmitting operation based on a comparison result of the receiving priority and the transmitting priority.

14. The method of claim 13, wherein the determining to perform a receive operation or to perform a transmit operation based on the comparison of the receive priority and the transmit priority comprises:

if the sending priority is higher than the receiving priority, determining to execute sending operation; or,

if the sending priority is lower than the receiving priority, determining to execute receiving operation; or,

and if the sending priority is equal to the receiving priority, determining to execute sending operation or receiving operation.

15. The method of claim 14, wherein the transmission priority is a highest priority among the priorities of the N first direct communication channels.

16. The method of claim 14, wherein the reception priority is a highest priority among priorities of the P third direct communication channels; or, the receiving priority is the highest priority among the priorities of all target types of the P third direct communication channels, where the target types include one or more of LTE direct communication data channels, LTE direct together with step channels, NR direct together with step channels, or direct feedback channels.

17. The method according to any one of claims 13 to 16, wherein after said determining to perform a receiving operation, the method further comprises:

k fourth direct communication channels are selected from the P third direct communication channels, wherein K is a positive integer smaller than or equal to P;

and receiving the K fourth direct communication channels.

18. The method of claim 17, wherein if the receiving capability of the terminal device does not support receiving the P third direct communication channels, the K fourth direct communication channels are first K direct communication channels in a fourth permutation order, where the fourth permutation order is obtained by permutation of the P third direct communication channels, without exceeding the receiving capability of the terminal device.

19. The method of claim 18, wherein the fourth ranking is based on the priorities of the third direct communication channels, the P third direct communication channels being ranked; wherein the third direct communication channel with high priority is located before the third direct communication channel with low priority in the fourth arrangement order.

20. The method of claim 18, wherein the fourth ranking is based on the priority and the reception level of each third direct communication channel, the P third direct communication channels being ranked; wherein the third direct communication channel with high receiving level is located before the third direct communication channel with low receiving level in the fourth arrangement sequence; and, for two third direct communication channels having the same reception level, the third direct communication channel having the higher priority is located before the third direct communication channel having the lower priority in the fourth arrangement order.

21. The method of claim 20, wherein the transmission level satisfies one or more of the following rules:

the receiving level of the direct connection data channel is higher than that of the direct connection data channel;

The receiving grade of the direct connection data channel is higher than that of the direct connection feedback channel;

the receiving level of the NR direct communication channel is higher or lower than that of the LTE direct communication channel; or,

the reception level of the direct feedback channel for carrying the hybrid automatic repeat request response information is higher than the reception level of the direct feedback channel for carrying the collision indication.

22. The method according to claim 2, wherein the format of the direct feedback channel comprises a first format and/or a second format; wherein, the time domain resource of the direct-connection feedback channel of the first format occupies part of symbols for direct-connection communication in a time slot; the time domain resource of the direct connection feedback channel of the second format occupies all symbols used for direct connection communication in one time slot.

23. The method of claim 22, wherein the direct feedback channel is transmitted in a second format on the time slot for transmitting the direct feedback channel if the time slot for transmitting the direct feedback channel overlaps with a time slot comprised in a resource pool for LTE direct communication.

24. The method of claim 22 wherein the direct feedback channel is transmitted in a second format on time slots contained in a pool of resources for NR direct communication.

25. The method according to any of claims 22 to 24, wherein the frequency domain resources of the second format direct feedback channel on one slot are located at different frequency domain locations than the frequency domain resources of the NR direct data channel on the same slot.

26. A direct communication device, comprising:

the processing module is used for selecting M second direct communication channels from N first direct communication channels to be received, determining the transmitting power of each second direct communication channel in the M second direct communication channels, wherein the sum of the transmitting powers of the M second direct communication channels is smaller than or equal to the maximum transmitting power of the terminal equipment, N is a positive integer, and M is a positive integer smaller than or equal to N;

and the transmitting module is used for transmitting the M second direct communication channels based on the transmitting power of each second direct communication channel in the M second direct communication channels.

27. A terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the direct communication method according to any of claims 1-25 when the computer program is executed.

28. A computer-readable storage medium, the computer-readable storage medium comprising computer instructions;

wherein the computer instructions, when run on a terminal device, cause the terminal device to perform the direct communication method of any of claims 1 to 25.