CN117478759A

CN117478759A - Data transmission method and device

Info

Publication number: CN117478759A
Application number: CN202210857476.1A
Authority: CN
Inventors: 陈咪咪; 丁昱
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2024-01-30

Abstract

The embodiment of the application provides a data transmission method and device, wherein the method comprises the following steps: information is sent on the physical layer side chain feedback channel PSFCH within the channel occupation time COT. Wherein the PSFCH includes reserved resources; and/or, an interval between the start position of the COT and the time domain position of the first PSFCH within the COT is greater than or equal to the first duration. By setting the PSFCH to include reserved resources, it can be ensured that there is information to be transmitted on the PSFCH within the COT. And limiting the interval between the initial position of the COT and the time domain position of the first PSFCH in the COT, so that the feedback information of the corresponding PSSCH can be transmitted on the PSFCH in the COT, and the information to be transmitted on the PSFCH in the COT is ensured, thereby effectively avoiding the problem of reduced probability of successful channel access due to the existence of the PSFCH in the COT.

Description

Data transmission method and device

Technical Field

Embodiments of the present application relate to communication technologies, and in particular, to a data transmission method and apparatus.

Background

In the COT (Channel Occupancy Time) sharing mechanism, if the interval between two transmissions in the COT is less than or equal to 16 μs, the terminal does not need to make LBT before transmitting, and if the interval is greater than or equal to 16 μs and less than or equal to 25 μs, the terminal only needs to make type 2A/B LBT.

And, the PSFCH in the side link occurs periodically, and the PSFCH occupies one symbol in the time domain. At some subcarrier spacing, 1 symbol is greater than 25 μs, which may result in a time interval between two transmissions of greater than 25 μs within the COT if PSFCH is present and no information transmission is present on the PSFCH, which in turn results in a longer time for the terminal device to perform type1LBT.

Thus, the presence of PSFCH in the COT reduces the probability of successful channel access.

Disclosure of Invention

The embodiment of the application provides a data transmission method and device for improving the probability of success of channel access.

In a first aspect, an embodiment of the present application provides a data transmission method, including:

transmitting information on a physical layer side chain feedback channel PSFCH within a channel occupation time COT;

wherein the PSFCH includes reserved resources; and/or, the interval between the initial position of the COT and the time domain position of the first PSFCH in the COT is greater than or equal to a first duration.

In a second aspect, an embodiment of the present application provides a data transmission method, including:

receiving information on a PSFCH within the COT;

In a third aspect, an embodiment of the present application provides a data transmission apparatus, including:

the sending module is used for sending information on a physical layer side chain feedback channel PSFCH within the channel occupation time COT;

In a fourth aspect, an embodiment of the present application provides a data transmission apparatus, including:

a receiving module, configured to receive information on a PSFCH within a COT;

In a fifth aspect, embodiments of the present application provide a data transmission device, including:

a memory for storing a program;

a processor for executing the program stored by the memory, the processor being for performing the method as described in the first aspect above when the program is executed.

In a sixth aspect, an embodiment of the present application provides a data transmission device, including:

a memory for storing a program;

a processor for executing the program stored by the memory, the processor being for performing the method as described in the second aspect above when the program is executed.

In a seventh aspect, embodiments of the present application provide a chip including instructions, the chip including a processor that executes computer-executable instructions, such that the processor performs the methods of the first and second aspects above.

In an eighth aspect, embodiments of the present application provide a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of the first aspect and the second aspect above.

In a ninth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements the method of the first and second aspects above.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic diagram of one possible communication scenario provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of another possible communication scenario provided by an embodiment of the present application;

FIG. 3 is a schematic diagram of an implementation of LBT provided in an embodiment of the present application;

fig. 4 is a flowchart of a data transmission method provided in an embodiment of the present application;

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

FIG. 6 is a schematic diagram of an implementation of interleaving provided in an embodiment of the present application;

fig. 7 is a second information transmission schematic diagram of the data transmission method according to the embodiment of the present application;

fig. 8 is a third information transmission schematic diagram of the data transmission method according to the embodiment of the present application;

fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application;

Fig. 10 is a schematic structural diagram of a data transmission device according to an embodiment of the present disclosure;

fig. 11 is a schematic hardware structure of a data transmission device according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

For ease of understanding, first, concepts related to the present application will be described.

Terminal equipment: is a device with wireless receiving and transmitting function. The terminal device may be deployed on land, including indoors or outdoors, hand-held, wearable or vehicle-mounted; can also be deployed on the water surface (such as ships, etc.); but may also be deployed in the air (e.g., on aircraft, balloon, satellite, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in unmanned driving (self driving), a wireless terminal in telemedicine (remote media), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, or the like. The terminal device according to the embodiments of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus, etc. The terminal device may also be fixed or mobile.

Network equipment: is a device with wireless receiving and transmitting function. Including but not limited to: an evolved base station (Evolutional Node B, eNB or eNodeB) in long term evolution (long term evolution, LTE), a base station (gnob or gNB) or a transceiver point (transmission receiving point/transmission reception poin, TRP) in new air interface technology (NR), a base station in a subsequent evolution system, an access node in a wireless fidelity (wireless fidelity, wiFi) system, a wireless relay node, a wireless backhaul node, etc. The base station may be: macro base station, micro base station, pico base station, small station, relay station, or balloon station, etc. Multiple base stations may support networks of the same technology as mentioned above, or may support networks of different technologies as mentioned above. A base station may contain one or more co-sited or non-co-sited TRPs. The network devices may also be wireless controllers, centralized Units (CUs), and/or Distributed Units (DUs) in the context of a cloud wireless access network (cloud radio access network, CRAN). The network device may also be a server, a wearable device, or an in-vehicle device, etc. The following description will take a network device as an example of a base station. The plurality of network devices may be the same type of base station or different types of base stations. The base station may communicate with the terminal or may communicate with the terminal through a relay station. The terminal may communicate with a plurality of base stations of different technologies, for example, the terminal may communicate with a base station supporting an LTE network, may communicate with a base station supporting a 5G network, may support dual connectivity with a base station of an LTE network and a base station of a 5G network, may support dual connectivity with a base station of a 5G network, and the like.

Side Link (SL): the direct communication link between the terminal device and the terminal device is defined as a side link, which may also be referred to as a secondary link. The wireless interface corresponding to the side link on the terminal device is called a direct communication interface, also called a SL (direct communication) interface. The communication link between the network device and the terminal device is called uulink (cellular communication link), and the radio interface on the terminal device corresponding to the cellular communication link is called Uu interface.

Side Link (SL) communication: refers to the communication between terminal devices. The link between the terminal devices is called a side link. The side link may also be referred to as a device-to-device (D2D) link, a side link, an auxiliary link, etc., which is not limited in this application.

The technical solution of the embodiment of the application can be applied to various communication systems, for example: the embodiments of the present application are not limited to a long term evolution (long term evolution, LTE) system, an LTE frequency division duplex (frequency division duplex, FDD) system, an LTE time division duplex (time division duplex, TDD) system, a fifth generation (5th generation,5G) communication system, a future communication system (e.g., a sixth generation (6th generation,6G) communication system), or a system in which multiple communication systems are integrated, and the like. Wherein 5G may also be referred to as New Radio (NR).

The technical scheme provided by the embodiment of the application can be applied to various communication scenes, for example, one or more of the following communication scenes: an eMBB communication, URLLC, machine type communication (machine type communication, MTC), emtc, device-to-device (D2D) communication, vehicle-to-vehicle (vehicle to everything, V2X) communication, vehicle-to-vehicle (vehicle to vehicle, V2V) communication, vehicle-to-internet (vehicle to network, V2N), vehicle-to-infrastructure (vehicle to infrastructure, V2I), vehicle-to-pedestrian (vehicle to pedestrian, V2P), and internet of things (internet of things, ioT), etc. Optionally, mctc may include one or more of the following communications: communication of industrial wireless sensor networks (industrial wireless sensor or network, IWSN), communication in video surveillance (video surveillance) scenarios, and communication of wearable devices, etc.

On the basis of the related concepts described above, a scenario to which the data transmission method in the present application is applied will be described below with reference to fig. 1 and 2.

Fig. 1 is a schematic diagram of one possible communication scenario provided in an embodiment of the present application. Referring to fig. 1, the network device 101, the terminal device 102, and the terminal device 103 are included. The link between the terminal device 102 and the terminal device 103 is a side link, and in the above embodiment, the side link has been described in detail, which is not described here again.

The links between the terminal device 102 and the network device 101, and between the terminal device 103 and the network device 101 are Uu air interface links, where Uu air interface can be understood as an interface (universal UE to network interface) between the general UE and the network, and Uu air interface communication refers to communication between the terminal device and the network device.

The terminal device in the example of fig. 1 currently has the capability to communicate with the network device and with other terminal devices at the same time or during the same period, i.e. the terminal device may send uplink signals to the network device and side link signals to other terminal devices.

Fig. 2 is a schematic diagram of another possible communication scenario provided in an embodiment of the present application. Referring to fig. 2, a terminal device 201 and a terminal device 202 are included. The link between the terminal device 201 and the terminal device 202 is a side link, and the detailed description of the side link has been already given in the above embodiment, which is not repeated here.

The terminal device 201 shown in the embodiment of the present application may perform communication to the terminal device 202 by itself, that is, in this case, the terminal device 201 may perform communication without an indication of a network device.

Fig. 1 and 2 are only exemplary scenarios, and the methods shown in the present application may also be applied to other communication scenarios, for example, where more network devices and/or more terminal devices may be included. The embodiment of the present application does not specifically limit the applicable communication scenario.

On the basis of the above description, the related art to which the present application relates will be described in further detail below.

With the continuous increase of mobile communication traffic, the shortage problem of authorized frequency bands is increasingly obvious, and the necessity of using unauthorized frequency bands is continuously increased.

Where unlicensed spectrum is a divided spectrum available for radio communication, which spectrum is generally considered to be a shared spectrum, i.e. a spectrum that can be used by a communication device as long as the relevant requirements on the spectrum are fulfilled, without requiring a proprietary spectrum grant to be applied to a proprietary spectrum authority.

That is, unlicensed bands have the property of sharing without permission, in one possible implementation, a communication device may use unlicensed spectrum, for example, following the principles of LBT (Listen Bofore Talk, listen before talk). Specifically, the communication device needs to perform LBT before using the channel on the unlicensed spectrum for signal transmission. The communication device can signal through the channel only when the channel monitoring result is that the channel is idle or LBT is successful; if the channel listening result of the communication device on the channel is that the channel is busy or LBT fails, the communication device cannot signal over the channel.

For example, the LBT may be understood in conjunction with fig. 3, and fig. 3 is a schematic diagram of implementing the LBT provided in an embodiment of the present application.

As shown in fig. 3, assuming that the communication device LBT is successful at time t1, a channel occupation time (Channel Occupancy Time, COT) may be determined for the communication device, where COT refers to a length of time for signal transmission using a channel of an unlicensed spectrum after LBT is successful on the channel of the unlicensed spectrum.

As can be determined with reference to fig. 3, within the COT, the communication device may occupy a channel for signaling, while within the COT, the communication device may occupy a channel for signaling may be discontinuous. The communication device may be a terminal device or a network device, which is not limited in this application.

The LBT scheme is described in further detail below, and the current LBT scheme includes a Type1 (Type 1) LBT and a Type2 (Type 2) LBT.

The Type1 LBT refers to LBT that the gNB or UE needs to do a long time before transmitting, and the window of LBT is randomly produced in a certain range, and the window size is adjusted according to the HARQ receiving situation.

Type2 LBT includes Type2A LBT, type2B LBT, and Type2C LBT. Wherein Type2ALBT refers to LBT with LBT window of 25 μs, type2B refers to LBT with LBT window of 16 μs, and Type2C refers to LBT without LBT.

Based on the above description, in the existing Unlicensed-side link (SL-U) system, in order to occupy channels for as long as possible, a COT sharing mechanism is supported.

The COT sharing mechanism means that in COT, if the time interval between two transmissions is less than or equal to 16 μs, the terminal device transmitting the signal for the second time does not need to make LBT before transmitting; if the time interval between the two transmissions is greater than 16 mu s and less than or equal to 25 mu s, the terminal equipment for transmitting the signal for the second time only needs to make Type 2A/B LBT between the transmissions; if the time interval between the two transmissions is greater than 25 μs, the terminal device transmitting the signal for the second time needs to do Type1 LBT between the transmissions. It can be appreciated that the introduction of the COT mechanism increases the probability of success of channel access by the terminal device.

It should be noted that, the terminal devices for the two transmissions described above may be the same terminal device or different terminal devices, which is not limited in this embodiment.

A physical layer side link feedback channel (physical sidelink feedback channel, PSFCH) in a side link is described below, wherein the PSFCH is used to transmit hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback of the side link or to transmit collision indication information, and the transmission of one or more UEs may be frequency division multiplexed.

And, the PSFCH in the side link may occur periodically, which may occur with a period of 1 slot, 2 slots, or 4 slots, and the PSFCH occupies 1 symbol in the time domain.

However, at some subcarrier spacing, 1 symbol is greater than 25 μs, so if there is no information on the PSFCH by the terminal device, the existence of the PSFCH may cause a COT outage, i.e., the time interval between two transmissions is greater than 25 μs, in which case the terminal device needs to do Type1LBT, resulting in a reduced probability of successful channel access.

Aiming at the problems in the prior art, the application provides the following technical conception: by reserving resources in the PSFCH for transmitting information, it is ensured that there is data transmission even if the PSFCH exists, thereby avoiding COT interruption. Or, by setting the start position of the COT and the time domain position of the nearest PSFCH to meet the preset condition, when the PSFCH appears, data always need to be transmitted, and the interruption of the COT is avoided.

The data transmission method provided in the present application is described in detail below with reference to specific embodiments, and fig. 4 is a flowchart of the data transmission method provided in the embodiment of the present application.

As shown in fig. 4, the method includes:

S401, information is sent on a physical layer side chain feedback channel PSFCH within a channel occupation time COT.

Wherein the PSFCH includes reserved resources; and/or, an interval between the start position of the COT and the time domain position of the first PSFCH within the COT is greater than or equal to the first duration.

Based on the above description, it may be determined that the terminal device may perform LBT when it needs to occupy a channel, and may determine COT after the LBT is successful, in which the terminal device may occupy the channel to transmit information.

In this embodiment, the terminal device that sends information on the PSFCH within the COT may be the terminal device that initiates the COT, or may also be the terminal device that can occupy the COT according to the sharing mechanism. The terminal occupying the COT according to the sharing mechanism may be, for example, a target receiving terminal of a terminal device that initiates the COT, or any other terminal capable of occupying the COT. The specific implementation of the terminal device for sending information is not limited in this embodiment, and it may be selected according to actual requirements, so long as it can send information on the PSFCH in the COT.

Based on the above description, it may be determined that the COT is determined according to the actual transmission requirement of the terminal device, and the PSFCH in the side link occurs periodically, so that the PSFCH may or may not be included in the determined COT.

It will be appreciated that when PSFCH is not included in the COT, there is no such problem as described above, because the presence of PSFCH causes a COT break. When the PSFCH is included in the COT, the information may be sent on the PSFCH in the COT in this embodiment.

It is possible to include only one PSFCH, and possibly a plurality of PSFCHs within the COT. If multiple PSFCHs are included within the COT, information may be sent on all PSFCHs within the COT.

In a possible implementation manner of this embodiment, for example, a resource may be reserved in the PSFCH, where the reserved resource may be used for transmitting the first information, so that it may be ensured that there is always information to be transmitted on the PSFCH, and thus the problem of the above-described occurrence of the COT interruption due to the existence of the PSFCH is avoided.

Or in another possible implementation of this embodiment, the time interval between the start position of the COT and the time domain position of the first PSFCH within the COT may also be limited to be greater than or equal to the first duration.

The start position of the COT may be a next time slot when the terminal device receives the COT indication information.

And one or more PSFCHs may be included within the COT, the first PSFCH within the COT being in fact the PSFCH within the COT that is closest to the start of the COT.

Here, the information sent on the PSFCH may be feedback information for the PSSCH, however, a certain time interval (gap) must be elapsed after the PSSCH is transmitted to be able to transmit the PSFCH for the PSSCH. That is, there must be a certain time interval between transmission of the PSFCH and transmission of the PSSCH.

It will be appreciated that if feedback information is to be sent over the PSFCH within the COT, it is necessary to ensure that the time interval between the start position of the COT and the time domain position of the first PSFCH within the COT is greater than or equal to the gap described above, so that it is ensured that feedback information for the PSSCH may be transmitted in the PSFCH included in the COT, that is, that there is information to be transmitted in the PSFCH included in the COT, and thus, it is effectively avoided that the COT is interrupted due to no information transmission over the PSFCH.

The first duration in this embodiment may be at least k time units, where the time units may be, for example, milliseconds, slots, symbols, subframes, and so on, which may be selected and set according to actual requirements, which is not limited in this embodiment.

And k time units may be, for example, a gap necessary between the above-described transmission PSFCH and the transmission PSSCH, or k time units may be larger than the above-described gap, which is not limited in this embodiment. The specific setting mode of the first duration can be selected and set according to actual requirements.

The data transmission method provided by the embodiment of the application comprises the following steps: information is sent on the physical layer side chain feedback channel PSFCH within the channel occupation time COT. Wherein the PSFCH includes reserved resources; and/or, an interval between the start position of the COT and the time domain position of the first PSFCH within the COT is greater than or equal to the first duration. By setting the PSFCH to include reserved resources, it can be ensured that there is information to be transmitted on the PSFCH within the COT. And limiting the interval between the initial position of the COT and the time domain position of the first PSFCH in the COT, so that the feedback information of the corresponding PSSCH can be transmitted on the PSFCH in the COT, and the information to be transmitted on the PSFCH in the COT is ensured, thereby effectively avoiding the problem of reduced probability of successful channel access due to the existence of the PSFCH in the COT.

Based on the foregoing, it may be determined that, in the data transmission method provided in the embodiments of the present application, there are two possible implementations of ensuring that the COT will not be interrupted, one implementation is to reserve resources in the PSFCH for transmitting the first information, and the other is to control the interval between the start position of the COT and the time domain position of the first PSFCH within the COT. These two implementations are described separately below.

First, an implementation manner of reserving resources in a PSFCH will be described with reference to fig. 5 to fig. 6, fig. 5 is a schematic information transmission diagram of a data transmission method provided in an embodiment of the present application, and fig. 6 is a schematic implementation diagram of interleaving provided in an embodiment of the present application.

As shown in fig. 5, it is assumed that the currently determined COT is as shown in fig. 5, and the COT includes from the slot n to the slot n+11.

And it can be determined with reference to fig. 5 that 3 PSFCHs are included within the currently determined COT. Wherein, the PSFCH takes 4 slots (slots) as a period, and periodically appears, and occupies one symbol in the time domain. Specifically, PSFCH1 exists at time slot n+3, PSFCH2 exists at time slot n+7, and PSFCH3 exists at time slot n+11.

In this embodiment, the PSFCH includes reserved resources, for example, referring to fig. 5, reserved resources 501 are included in the PSFCH1, reserved resources 502 are included in the PSFCH2, and reserved resources 503 are included in the PSFCH3.

Wherein the reserved resource is at least one resource unit, which may be, for example, an interlace (interlace) or a subchannel.

For example, as can be understood from the interlaces in the present embodiment in conjunction with fig. 6, as shown in fig. 6, one interlace physical resource block (Physical Resource Block, PRB) is composed of non-contiguous PRBs, and each interlace is interleaved together. In FIG. 6, 5 interlaces, i.e., interlace0, interlace1, interlace2, interlace3, and interlace4 are included.

In the actual implementation process, the resource unit may be any other possible resource combination manner, which may be selected and set according to actual requirements, which is not limited in this embodiment.

In one possible implementation, the resource location, number of resources, implementation of resource units, etc. of the reserved resources may be configured, for example, by higher layer parameters, or may also be dynamically indicated.

Based on the above description, it may be determined that the terminal device may send information on the PSFCH within the COT.

In one possible implementation, the terminal device may send information on unreserved resources in the PSFCH, for example.

For example, if there is information to be transmitted on the PSFCH, the terminal device may transmit the information to be transmitted on unreserved resources of the PSFCH. The information to be transmitted is, for example, feedback information of the corresponding PSSCH, or any other possible information to be transmitted on the PSFCH.

In another possible implementation, the terminal device may send information on unreserved resources in the PSFCH, for example.

For example, when there is no information to be transmitted on unreserved resources in the PSFCH, the information may be transmitted on reserved resources in the PSFCH.

Wherein the information sent on the reserved resources in the PSFCH may be, for example, a copy of all or part of the information of the PSSCH located on a slot of the PSFCH.

Or, the information sent on the reserved resource in the PSFCH may also be preset information, where the preset information may be understood as meaningless information, which is merely for information transmission on the PSFCH, where the specific implementation of the preset information may be selected and set according to the actual requirement.

In the actual implementation process, the information sent on the reserved resources in the PSFCH may be selected and set according to the actual requirements, which is not limited in this embodiment, as long as the information is sent on the reserved resources in the PSFCH.

And it should be further noted that, in this embodiment, the information is sent on reserved resources and unreserved resources of the PSFCH, which is and/or is related to each other.

That is, the terminal device may send information only on reserved resources of the PSFCH, for example, when there is no information to be sent on unreserved resources, to send information on reserved resources of the PSFCH, so as to ensure that there is information transmission in the PSFCH, so as to ensure that transmission in the COT is not interrupted.

Or, the terminal device may also send information only on unreserved resources of the PSFCH, for example, when there is information to be sent on unreserved resources, the information may be sent on unreserved resources of the PSFCH, and at this time, it is not necessary to resend the information on reserved resources of the PSFCH, and it may also be ensured that there is information transmission in the PSFCH, so as to ensure that transmission in the COT is not interrupted.

Alternatively, the terminal device may also send information on both unreserved resources of the PSFCH and reserved resources of the PSFCH. For example, the information to be transmitted exists on the unreserved resource of the PSFCH, in this case, the information described above may also be transmitted on the reserved resource of the PSFCH as such, so that the information transmission in the PSFCH may be more effectively ensured to ensure that the transmission in the COT is not interrupted.

The above description of the implementation of PSFCH including reserved resources is described in further detail below with reference to fig. 7 and 8 to limit the start position of the COT to ensure that the specific implementation of information transfer within the COT is described in further detail. Fig. 7 is a second information transmission schematic diagram of the data transmission method according to the embodiment of the present application, and fig. 8 is a third information transmission schematic diagram of the data transmission method according to the embodiment of the present application.

First, a description will be given of a gap between the PSSCH and the PSFCH with reference to fig. 7, and it can be determined based on the description that if feedback information of the PSSCH is to be transmitted on the PSFCH, at least a certain time slot needs to be spaced between the PSFCH and the PSSCH, that is, the gap described above. The following takes the case where gap is two slots (including the slot in which PSFCH is located) as an example, and will be understood in conjunction with fig. 7.

Referring to fig. 7, for example, in the example of fig. 7, two slots are separated between PSSCH3 and PSFCH1, so that the feedback information corresponding to PSSCH3 may be transmitted on PSFCH 1.

And, three slots are spaced between PSSCH2 and PSFCH1, then the feedback information corresponding to PSSCH2 may be transmitted on PSFCH 1.

And, four slots are spaced between PSSCH1 and PSFCH1, then the feedback information corresponding to PSSCH1 may be transmitted on PSFCH 1.

However, only one slot is spaced between PSSCH4 and PSFCH1, and no slot is spaced between PSSCH5 and PSFCH1, so that feedback information of PSSCH4 and PSSCH5 cannot be transmitted on PSFCH 1.

In order to ensure that there is data to be transmitted on PSFCH1, it is necessary to limit the start position of the COT at least before the time slot (time slot n+2) in which PSSCH3 is located, so that it is ensured that the feedback information of the PSSCH can be transmitted on PSFCH 1.

Conversely, if the start position of the COT is located in the slot (slot n+3) where the PSSCH4 is located or in the slot (slot n+4) where the PSSCH5 is located, since the PSSCH4 and the PSSCH5 do not meet the gap requirement, there is no guarantee that there is data to be transmitted on the PSFCH 1.

Based on the above description, it can be determined that by limiting the interval between the start position of the COT and the time domain position of the first PSFCH in the COT to be greater than or equal to the first duration, it can be effectively ensured that there is data to be transmitted on the PSFCH in the COT.

And also, it should be noted that the PSFCH included in fig. 7 is periodic with 5 slots, and thus, there are PSFCH1 and PSFCH2 shown in fig. 7. And based on the above description, it may be determined that the existing PSFCH may be periodic with 1, 2, or 4 slots, but, for example, the PSFCH is periodic with 1 slot, where the interval between the start position of the COT and the time domain position of the first PSFCH within the COT described above is not satisfied is greater than or equal to the first duration.

Thus, in order to meet the above-described constraint of the start position of the COT, the period of the PSFCH may be increased, for example, to ensure that the interval between the start position of the COT and the time domain position of the first PSFCH within the COT may be greater than or equal to the first duration. For example, when the period of the PSFCH is set, it may be at least ensured that the period of the PSFCH is greater than or equal to the first duration.

On the basis of the start position of the COT described above, a PSFCH transmission window may be provided in this embodiment, and at least one PSFCH may be included in one PSFCH transmission window.

For example, PSFCH1 in fig. 7 can be understood as a transmission window, and PSFCH2 can be understood as a transmission window.

Alternatively, multiple PSFCHs may also be included in the PSFCH transmission window, as may be appreciated, for example, in connection with fig. 8.

As shown in fig. 8, it is assumed that 4 PSFCHs may be included in one PSFCH transmission window. For example, in the example of fig. 8, PSFCH1, PSFCH2, PSFCH3, and PSFCH4 are included in PSFCH transmission window 1, PSFCH5, PSFCH6, PSFCH7, and PSFCH8 are included in PSFCH transmission window 2, and PSFCH9, PSFCH10, PSFCH11, and PSFCH12 are included in PSFCH transmission window 3.

Assuming that the start position of the COT is located at the slot n in the example of fig. 8, as shown in fig. 8, feedback information corresponding to PSSCH1 may be transmitted in PSFCH1, feedback information corresponding to PSSCH2 may be transmitted in PSFCH2, and feedback information corresponding to PSSCH3 may be transmitted in PSFCH 3.

As can be appreciated based on the above fig. 7 and 8, the PSFCH in this embodiment is also periodically transmitted, but the PSFCH transmission windows are used as a unit of repeated transmission, and each PSFCH transmission window may include one or more PSFCHs.

By setting the PSFCH transmission window, including one or more PSFCHs in the PSFCH transmission window and setting the PSFCH transmission window to periodically appear, the timely and effective transmission of feedback information of PSSCH to be transmitted can be ensured each time PSFCH appears, and COT interruption caused by the existence of PSFCH can be avoided.

On the basis of the above description, when the terminal device sends information on the PSFCH of the COT, the terminal device may send information on the PSFCHs of N PSFCH transmission windows in the COT.

It is understood that N PSFCH transmission windows may be included within the COT, where N is an integer greater than or equal to 1.

However, it should be noted that, because the PSFCH transmission window occurs periodically, but the COT is determined according to the channel occupation requirement of the terminal device, the PSFCH transmission window in the COT may be a complete transmission window or may also be a partial transmission window.

For example, as can be understood in conjunction with fig. 8, as shown in fig. 8, it is assumed that the currently determined COT is from slot n to slot n+9. Within the COT, a complete PSFCH transmission window 1, a complete PSFCH transmission window 2, and a partial PSFCH transmission window 3 are included.

In this embodiment, the duration of a complete transmission window may be a second duration, where the second duration may be at least i time units, where the time units may be similar to those described above, such as ms or time slots, etc.

It may be determined that when the PSFCH transmission window within the COT is a complete transmission window, the PSFCH transmission window has a duration equal to the second duration.

And when the PSFCH transmission window in the COT is a partial transmission window, the PSFCH transmission window has a duration less than the second duration.

For example, in the example of fig. 8, it is assumed that the duration of one complete transmission window is 4 slots. Wherein, PSFCH transmission window 1, PSFCH transmission window 2 and PSFCH transmission window 3 are included in COT. Wherein, the PSFCH transmission window 1 and the PSFCH transmission window 2 are complete transmission windows, so that the duration of the PSFCH transmission window 1 and the PSFCH transmission window 2 in the COT is equal to 4 time slots. And the PSFCH transmission window 3 is a partial transmission window, so that the duration of the PSFCH transmission window 3 in the COT is less than 4 time slots, specifically 2 time slots.

And it should be further noted that, in the plurality of PSFCH transmission windows, there is a time interval between every two adjacent PSFCH transmission windows, which interval may be, for example, a third time length, where the third time length may be at least j time units, where the time units are similar to the above description, and may be, for example, ms or time slots, etc.

Here, since at least one PSFCH may be included in one PSFCH transmission window, it is to be noted that the interval between two adjacent PSFCH transmission windows is actually the time interval between the last PSFCH in the previous PSFCH transmission window and the first PSFCH in the subsequent PSFCH transmission window.

More specifically, taking the example that the third duration is at least j time slots, the interval between two adjacent PSFCH transmission windows is actually the interval between the start position of the next time slot of the time slot where the last PSFCH in the previous PSFCH transmission window is located and the end position of the time slot where the first PSFCH in the next PSFCH transmission window is located.

As can be understood in conjunction with fig. 8, as shown in fig. 8, taking PSFCH transmission window 1 and PSFCH transmission window 2 as examples, the interval between these two PSFCH transmission windows is the interval between the start position of time slot n+6 to the end position of time slot n+8.

And, the PSFCH transmission window in this embodiment occurs periodically, so that there is a transmission period in the PSFCH transmission window, where the period of the PSFCH transmission window may be, for example, the sum of the second duration and the third duration described above. For example, in the example of fig. 8, the period of the PSFCH transmission window is actually 7 slots.

And on the basis of the embodiments described in fig. 7 and 8, in an alternative implementation, in order to prevent the COT from being interrupted, the terminal device may send, for example, a PSSCH from a start position of the COT to a time slot between the first PSFCH in the COT, where the PSSCH may be a retransmission of the current TB (Transport Block), or may also be another TB to be transmitted, which is not limited by the present embodiment.

The foregoing embodiments describe implementation on the side of the terminal device, where implementation on the side of the network device corresponds to implementation of the terminal device, and detailed description of specific implementation is omitted herein.

Fig. 9 is a schematic structural diagram of a data transmission device according to an embodiment of the present application. As shown in fig. 9, the apparatus 90 includes: and a transmitting module 901.

A sending module 901, configured to send information on a physical layer side chain feedback channel PSFCH within a channel occupation time COT;

In one possible design, the sending module 901 is specifically configured to:

transmitting information on reserved resources in the PSFCH; and/or

Information is sent on unreserved resources in the PSFCH.

In one possible design, the sending module 901 is specifically configured to:

and when the unreserved resources in the PSFCH have no information to be transmitted, transmitting information on the reserved resources in the PSFCH.

In one possible design, the sending module 901 is specifically configured to:

transmitting the copy of all or part of information of a physical layer side chain shared channel PSSCH on reserved resources in the PSFCH; or (b)

And sending preset information on reserved resources in the PSFCH.

In one possible design, the PSSCH is located on a slot where the PSFCH is located.

In one possible design, the reserved resource is at least one resource unit, which is an interlace or a subchannel.

In one possible design, the sending module 901 is specifically configured to:

transmitting the information on PSFCHs of N PSFCH transmission windows located within the COT;

the PSFCH transmission window is a complete transmission window, or the PSFCH transmission window is a partial transmission window.

In one possible design, when the PSFCH transmission window is a complete transmission window, the PSFCH transmission window has a duration equal to the second duration; or,

and when the PSFCH transmission window is a partial transmission window, the duration of the PSFCH transmission window is smaller than the second duration.

In one possible design, the interval between two adjacent PSFCH transmission windows of the N PSFCH transmission windows is a third duration.

In one possible design, the interval between two adjacent PSFCH transmission windows is the time interval between the last PSFCH in the previous PSFCH transmission window and the first PSFCH in the subsequent PSFCH transmission window.

In one possible design, the first duration is at least k time units, k being a positive integer greater than or equal to 1;

the second duration is at least i time units, and i is a positive integer greater than or equal to 1;

the third duration is at least j time units, and j is a positive integer greater than or equal to 1.

In one possible design, the PSFCH transmission window information and the reserved resources are configured for radio resource control, RRC, signaling.

The device provided in this embodiment may be used to implement the technical solution of the foregoing method embodiment, and its implementation principle and technical effects are similar, and this embodiment will not be described herein again.

Fig. 10 is a schematic diagram of a second structure of the data transmission device according to the embodiment of the present application. As shown in fig. 10, the apparatus 10 includes: a receiving module 1001.

A receiving module 1001, configured to receive information on a PSFCH in a COT;

In one possible design, the receiving module 1001 is specifically configured to:

receiving information on reserved resources in the PSFCH; and/or

Information is received on unreserved resources in the PSFCH.

and when the unreserved resource in the PSFCH does not have information to be received, receiving information on the reserved resource in the PSFCH.

receiving a copy of all or part of the PSSCH information on reserved resources in the PSFCH; or (b)

And receiving preset information on reserved resources in the PSFCH.

receiving the information on PSFCHs of N PSFCH transmission windows located within the COT;

Fig. 11 is a schematic hardware structure of a data transmission device provided in the embodiment of the present application, as shown in fig. 11, a data transmission device 110 in the embodiment includes: a processor 1101 and a memory 1102; wherein the method comprises the steps of

Memory 1102 for storing computer-executable instructions;

the processor 1101 is configured to execute computer-executable instructions stored in the memory to implement the steps performed by the data transmission method in the above embodiment. Reference may be made in particular to the relevant description of the embodiments of the method described above.

Alternatively, the memory 1102 may be separate or integrated with the processor 1101.

When the memory 1102 is provided separately, the data transmission device further comprises a bus 1103 for connecting said memory 1102 and the processor 1101.

The embodiment of the application also provides a chip, which comprises a processor, wherein the processor can be used for executing computer-executed instructions stored in a memory to realize the data transmission method in any of the method embodiments. Alternatively, the memory storing the computer-executable instructions may be a memory internal to the chip or may be a memory external to the chip.

With respect to each of the apparatuses and each of the modules/units included in the products described in the above embodiments, it may be a software module/unit, a hardware module/unit, or a software module/unit, and a hardware module/unit. For example, for each device or product applied to or integrated on a chip, each module/unit included in the device or product may be implemented in hardware such as a circuit, or at least part of the modules/units may be implemented in software program, where the software program runs on a processor integrated inside the chip, and the rest (if any) of the modules/units may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module/unit contained in the device and product can be realized in a hardware manner such as a circuit, different modules/units can be located in the same component (such as a chip, a circuit module and the like) or different components of the chip module, or at least part of the modules/units can be realized in a software program, the software program runs on a processor integrated in the chip module, and the rest (if any) of the modules/units can be realized in a hardware manner such as a circuit; for each device and product applied to or integrated in the terminal device/network device, each module/unit included in the device/network device may be implemented in hardware such as a circuit, and different modules/units may be located in the same component (e.g. a chip, a circuit module, etc.) or different components in the terminal device/network device, or at least part of the modules/units may be implemented in a software program, where the software program runs on a processor integrated in the terminal device/network device, and the remaining (if any) part of the modules/units may be implemented in hardware such as a circuit.

The embodiment of the application also provides a computer readable storage medium, wherein computer execution instructions are stored in the computer readable storage medium, and when a processor executes the computer execution instructions, the data transmission method executed by the data transmission device is realized.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods described in the embodiments of the present application.

It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present invention may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A data transmission method, comprising:

2. The method of claim 1, wherein transmitting information on a physical layer side chain feedback channel PSFCH within a channel occupancy time COT comprises:

transmitting information on reserved resources in the PSFCH; and/or

Information is sent on unreserved resources in the PSFCH.

3. The method of claim 2, wherein the sending information on reserved resources in the PSFCH comprises:

4. The method of claim 2, wherein the sending information on reserved resources in the PSFCH comprises:

And sending preset information on reserved resources in the PSFCH.

5. The method of claim 4 wherein the PSSCH is located on a slot in which the PSFCH is located.

6. The method of claim 1, wherein the reserved resource is at least one resource unit, and wherein the resource unit is an interlace or a subchannel.

7. The method of claim 1, wherein transmitting information on a physical layer side chain feedback channel PSFCH within a channel occupancy time COT comprises:

8. The method of claim 7, wherein when the PSFCH transmission window is a full transmission window, the PSFCH transmission window has a duration equal to a second duration; or,

9. The method of claim 8, wherein an interval between two adjacent PSFCH transmission windows of the N PSFCH transmission windows is a third duration.

10. The method of claim 9, wherein the interval between the two adjacent PSFCH transmission windows is a time interval between a last PSFCH in a previous PSFCH transmission window and a first PSFCH in a subsequent PSFCH transmission window.

11. The method according to any one of claims 1-10, wherein the first time period is at least k time units, k being a positive integer greater than or equal to 1;

12. The method according to claim 6 or 7, characterized in that the PSFCH transmission window information and the reserved resources are radio resource control, RRC, signaling configured.

13. A data transmission method, comprising:

receiving information on a PSFCH within the COT;

14. The method of claim 13, wherein receiving information on the PSFCH within the COT comprises:

Receiving information on reserved resources in the PSFCH; and/or

Information is received on unreserved resources in the PSFCH.

15. The method of claim 14, wherein the receiving information on reserved resources in the PSFCH comprises:

16. The method of claim 14, wherein the receiving information on reserved resources in the PSFCH comprises:

And receiving preset information on reserved resources in the PSFCH.

17. The method of claim 16 wherein the PSSCH is located on a slot in which the PSFCH is located.

18. The method of claim 13, wherein the reserved resource is at least one resource unit, and wherein the resource unit is an interlace or a subchannel.

19. The method of claim 13, wherein receiving information on the PSFCH within the COT comprises:

20. The method of claim 19, wherein when the PSFCH transmission window is a full transmission window, the PSFCH transmission window has a duration equal to a second duration; or,

21. The method of claim 20, wherein an interval between two adjacent PSFCH transmission windows of the N PSFCH transmission windows is a third duration.

22. The method of claim 21, wherein the interval between the two adjacent PSFCH transmission windows is a time interval between a last PSFCH in a previous PSFCH transmission window and a first PSFCH in a subsequent PSFCH transmission window.

23. The method according to any one of claims 13-22, wherein the first time period is at least k time units, k being a positive integer greater than or equal to 1;

24. The method according to claim 18 or 19, wherein the PSFCH transmission window information and the reserved resources are radio resource control, RRC, signaling configured.

25. A data transmission apparatus, comprising:

26. The apparatus of claim 25, wherein the sending module is specifically configured to:

transmitting information on reserved resources in the PSFCH; and/or

Information is sent on unreserved resources in the PSFCH.

27. The apparatus of claim 26, wherein the sending module is specifically configured to:

28. The apparatus of claim 26, wherein the sending module is specifically configured to:

And sending preset information on reserved resources in the PSFCH.

29. The apparatus of claim 28, wherein the PSSCH is located on a slot in which the PSFCH is located.

30. The apparatus of claim 25, wherein the reserved resource is at least one resource unit, and wherein the resource unit is an interlace or a subchannel.

31. The apparatus of claim 25, wherein the sending module is specifically configured to:

32. The apparatus of claim 31, wherein when the PSFCH transmission window is a full transmission window, the PSFCH transmission window has a duration equal to a second duration; or,

33. The apparatus of claim 32, wherein an interval between two adjacent PSFCH transmission windows of the N PSFCH transmission windows is a third duration.

34. The apparatus of claim 33, wherein the interval between the two adjacent PSFCH transmission windows is a time interval between a last PSFCH in a previous PSFCH transmission window and a first PSFCH in a subsequent PSFCH transmission window.

35. The apparatus of any one of claims 25-34, wherein the first time period is at least k time units, k being a positive integer greater than or equal to 1;

36. The apparatus according to claim 30 or 31, wherein the PSFCH transmission window information and the reserved resources are configured for radio resource control, RRC, signaling.

37. A data transmission apparatus, comprising:

a receiving module, configured to receive information on a PSFCH within a COT;

38. The apparatus of claim 37, wherein the receiving module is specifically configured to:

Receiving information on reserved resources in the PSFCH; and/or

Information is received on unreserved resources in the PSFCH.

39. The apparatus of claim 38, wherein the receiving module is specifically configured to:

40. The apparatus of claim 38, wherein the receiving module is specifically configured to:

And receiving preset information on reserved resources in the PSFCH.

41. The apparatus of claim 40, wherein the PSSCH is located in a slot in which the PSFCH is located.

42. The apparatus of claim 37, wherein the reserved resource is at least one resource unit, and wherein the resource unit is an interlace or a subchannel.

43. The apparatus of claim 37, wherein the receiving module is specifically configured to:

44. The apparatus of claim 43, wherein when the PSFCH transmission window is a full transmission window, the duration of the PSFCH transmission window is equal to the second duration; or,

45. The apparatus of claim 44, wherein an interval between two adjacent ones of the N PSFCH transmission windows is a third duration.

46. The apparatus of claim 45, wherein the interval between the two adjacent PSFCH transmission windows is a time interval between a last PSFCH in a previous PSFCH transmission window and a first PSFCH in a subsequent PSFCH transmission window.

47. The apparatus of any one of claims 37-46, wherein the first time period is at least k time units, k being a positive integer greater than or equal to 1;

48. The apparatus of claim 42 or 43, wherein the PSFCH transmission window information and the reserved resources are configured for radio resource control, RRC, signaling.

49. A data transmission apparatus, comprising:

a memory for storing a program;

a processor for executing the program stored by the memory, the processor being for performing the method of any one of claims 1 to 12 when the program is executed.

50. A data transmission apparatus, comprising:

a memory for storing a program;

a processor for executing the program stored by the memory, the processor being for performing the method of any one of claims 13 to 24 when the program is executed.

51. A chip comprising a processor that executes computer-executable instructions to cause the processor to perform the method of any one of claims 1 to 12 or 13 to 24.

52. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of any of claims 1 to 12 or 13 to 24.

53. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any of claims 1 to 12 or of claims 13 to 24.