Channel occupation time determining method and device, first communication node and storage medium

文档序号：516935 发布日期：2021-05-28 浏览：4次中文

阅读说明：本技术 信道占用时间确定方法、装置、第一通信节点及存储介质 (Channel occupation time determining method and device, first communication node and storage medium ) 是由林伟田力徐汉青于 2021-01-15 设计创作，主要内容包括：本申请提供了信道占用时间确定方法、装置、第一通信节点及存储介质,该方法应用于第一通信节点,包括：在所述第一通信节点未发起信道占用的情况下,检测第二通信节点发送的信息；根据检测结果确定用于数据传输的信道占用时间COT。(The application provides a method and a device for determining channel occupation time, a first communication node and a storage medium, wherein the method is applied to the first communication node and comprises the following steps: under the condition that the first communication node does not initiate channel occupation, detecting information sent by a second communication node; and determining the channel occupation time COT for data transmission according to the detection result.)

1. A method for determining a channel occupation time, applied to a first communication node, includes:

under the condition that the first communication node does not initiate channel occupation, detecting information sent by a second communication node;

and determining the channel occupation time COT for data transmission according to the detection result.

2. The method of claim 1, wherein the determining the channel occupancy time COT for data transmission according to the detection result comprises:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the information sent by the second communication node comprises unicast service data, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

3. The method of claim 2, wherein the unicast traffic data comprises one of:

physical uplink shared channel data; physical downlink shared channel data; physical uplink control channel data; physical downlink control channel data.

4. The method of claim 1, wherein the determining the channel occupancy time COT for data transmission according to the detection result comprises:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the information sent by the second communication node comprises the group control signaling, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

5. The method of claim 1, wherein the determining the channel occupancy time COT for data transmission according to the detection result comprises:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the information sent by the second communication node comprises a group control signaling and the group control signaling indicates that the length of the residual COT is greater than 0, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

6. The method of claim 1, wherein the determining the channel occupancy time COT for data transmission according to the detection result comprises:

and under the condition that the information sent by the second communication node comprises a group control signaling and the group control signaling indicates that the remaining COT is 0, the COT corresponding to the channel occupation initiated by the second communication node is not shared for data transmission, the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

7. The method of claim 1, wherein the determining the channel occupancy time COT for data transmission according to the detection result comprises:

and when the information sent by the second communication node comprises a group control signaling, the group control signaling indicates that the remaining COT length is a predefined row, and the first communication node meets the condition of initiating channel occupation, initiating channel occupation corresponding to the COT for data transmission, wherein the predefined row comprises a row with a predefined row index or a row with a predefined information indication combination, and the second communication node is used as a response device.

8. The method according to any of claims 4-7, wherein said group control signaling comprises downlink control information format 2_ 0.

9. The method according to any of claims 4-6, comprising one of:

the second communication node transmitting the group control signaling at a COT start position of a Fixed Frame Period (FFP) of the second communication node;

and the second communication node sends the group control signaling in a first transmission cluster transmitted at the COT starting position of the FFP of the second communication node.

10. The method of claim 7, comprising one of:

the second communication node transmitting the group control signaling at a start position where the sharing of the COT is started;

and the second communication node sends the group control signaling in the first transmission cluster which starts to transmit at the starting position of the shared COT.

11. The method according to any of claims 4-7, wherein said determining the channel occupancy time, COT, for data transmission based on the detection result comprises:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the group control signaling sent by the second communication node is not detected and the unicast service data sent by the second communication node is detected, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

12. The method according to any of claims 4-7, wherein said determining the channel occupancy time, COT, for data transmission based on the detection result comprises:

and under the condition that the group control signaling sent by the second communication node is not detected, the COT corresponding to the channel occupation initiated by the second communication node is not shared for data transmission, the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and under the condition that the first communication node receives the group control signaling for the first time, the COT for data transmission is determined according to the information indicated by the group control signaling.

13. The method according to any of claims 4-7, wherein said determining the channel occupancy time, COT, for data transmission based on the detection result comprises:

and initiating channel occupation for data transmission under the condition that the group control signaling sent by the second communication node is not detected and the condition of initiating channel occupation is met.

14. The method of claim 13, further comprising:

and under the condition of receiving the group control signaling transmitted by the second communication node after successfully initiating the channel occupation, determining the COT of the subsequent data transmission according to the group control signaling.

15. The method of claim 14, wherein determining the COT for the subsequent data transmission based on the group control signaling comprises:

and releasing subsequent usage rights of the COT of the first communication node under the condition that the group control signaling indicates that the first communication node should not initiate channel occupation.

16. The method of claim 15, further comprising:

the first communication node may share the COT of the second communication node for data transmission if the group control signaling indicates that the first communication node may share the COT of the second communication node.

17. The method of claim 15, further comprising:

in a case where the group control signaling indicates that the first communication node may not share the COT of the second communication node, the first communication node no longer transmits data in the COT of the second communication node.

18. The method of claim 14, wherein determining the COT for the subsequent data transmission based on the group control signaling comprises:

in the case where the group control signaling indicates that the first communication node may initiate channel occupancy, the first communication node may continue to use the initiated COT for data transmission.

19. The method of claim 1, further comprising:

when the transmitted data is a dynamic grant transmission, and the information sent by the second communication node includes a control signaling for scheduling the dynamic grant transmission, and the control signaling indicates that the CCA type is listen-before-talk-nothing, and the dynamic grant transmission is in the valid COT of the second communication node, sharing the COT of the second communication node for the dynamic grant transmission;

the listen-before-talk-nothing indicates to the control signaling that the first communication node may transmit the dynamic grant transmission without performing a CCA.

20. The method of claim 19, further comprising:

and the first communication node determines whether to execute CCA and the executed CCA type according to the interval between the dynamic authorization transmission and the previous transmission in the COT of the second communication node in the process of sharing the COT of the second communication node.

21. The method of claim 1, further comprising:

and when the transmitted data is dynamic authorization transmission, the dynamic authorization transmission meets the condition of initiating channel occupation, the information sent by the second communication node comprises a control signaling for scheduling the dynamic authorization transmission, and the control signaling indicates that the CCA type is listen before talk, the first communication node is used as initiating equipment to initiate channel occupation for executing the dynamic authorization transmission.

22. The method of claim 7 or 13 or 21, wherein initiating a channel occupancy condition comprises:

the transmission start position is aligned with an FFP start position of the first communication node and the transmission end position ends before an idle period of the FFP.

23. The method of claim 1, further comprising:

the data transmitted is dynamic authorization transmission, the information sent by the second communication node comprises a control signaling for scheduling the dynamic authorization transmission, and the COT used by the dynamic authorization transmission is determined according to a 1-bit field added in the control signaling.

24. An apparatus for determining a channel occupancy time, configured at a first communication node, the apparatus comprising:

the detection module is set to detect the information sent by the second communication node under the condition that the first communication node does not initiate channel occupation;

and the determining module is set to determine the channel occupation time COT used for data transmission according to the detection result.

25. A first communications node, comprising:

one or more processors;

storage means for storing one or more programs;

when executed by the one or more processors, cause the one or more processors to implement the method of any one of claims 1-23.

26. A storage medium, characterized in that the storage medium stores a computer program which, when executed by a processor, implements the method of any one of claims 1-23.

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining a channel occupation time, a first communication node, and a storage medium.

Background

The usage of the unlicensed spectrum needs to follow a certain regulatory policy, for example, a device must perform Clear Channel Assessment (CCA) before transmitting data using the unlicensed carrier, and only a device that detects that the Channel is Clear can occupy the Channel on the unlicensed carrier to transmit data.

However, under certain conditions, there is no effective scheme for a device to directly perform channel access acquisition Channel Occupancy Time (COT) for data transmission as an initiating device or to share the COT for data transmission as a responding device.

Disclosure of Invention

The application provides a method and a device for determining channel occupation time, a first communication node and a storage medium, and the channel occupation time for data transmission is effectively determined.

In a first aspect, an embodiment of the present application provides a method for determining a channel occupation time, which is applied to a first communication node, and includes:

under the condition that the first communication node does not initiate channel occupation, detecting information sent by a second communication node;

and determining the channel occupation time COT for data transmission according to the detection result.

In a second aspect, an embodiment of the present application provides an apparatus for determining a channel occupation time, where the apparatus is configured at a first communication node, and the apparatus includes:

the detection module is set to detect the information sent by the second communication node under the condition that the first communication node does not initiate channel occupation;

and the determining module is set to determine the channel occupation time COT used for data transmission according to the detection result.

In a third aspect, an embodiment of the present application provides a first communication node, including: one or more processors; storage means for storing one or more programs; when executed by the one or more processors, cause the one or more processors to implement a method as described in the first aspect.

In a fourth aspect, an embodiment of the present application provides a storage medium storing a computer program, which when executed by a processor implements the method according to the first aspect of the present application.

With regard to the above embodiments and other aspects of the present application and implementations thereof, further description is provided in the accompanying drawings description, detailed description and claims.

Drawings

Fig. 1 is a schematic flowchart of a method for determining a channel occupation time according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a device for determining a channel occupation time according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a first communication node according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.

Currently, the first stage of the 5th Generation mobile communication technology (5G), New Radio (NR) technology has been completed. From the trends of standard formulation and technical development, the 5G system is dedicated to research on technical indexes such as higher speed, huge link, ultra-low delay, higher reliability, hundreds of times of energy efficiency improvement and the like to support new demand change. An NR-based Unlicensed Spectrum Access (NR-U) technology has a great application prospect in the aspects of Internet of things, factory automation and the like, but at present, the NR-U still faces many problems to be solved.

For the use of the unlicensed spectrum, certain regulatory policies need to be followed, for example, a device must perform CCA Before transmitting data using the unlicensed carrier, which may also be referred to as Listen Before Talk (LBT)), and only a device whose CCA detects that a channel is clear can occupy the channel on the unlicensed carrier to transmit data. The Frame Based Equipment (FBE) mode contains three main parameters: the system comprises a Fixed Frame Period (FFP), a channel occupation time COT and an idle Period, wherein the FFP consists of the COT and the idle Period, the starting position of the COT is aligned with the starting position of the FFP, and the ending position of the idle Period is aligned with the ending position of the FFP. The FBE initiated channel occupation process is as follows: the FBE executes CCA detection in an idle period adjacent to the FFP, and if the CCA detects that a current channel is idle, the FBE can acquire a COT use right of the FFP and can start to transmit data from a starting symbol of the FFP; and if CCA detects that the current channel is busy, the FBE cannot use the starting symbol of the FFP for data transmission. The FBE mode may also be referred to as a semi-static channel access mode, and a channel access procedure period of the semi-static channel access mode and the FFP are different expressions of the same parameter.

Both User Equipment (UE) and a base station may serve as initiating devices to initiate channel occupation, and under what conditions, the UE needs to share the COT of the base station, and under other conditions, the UE needs to initiate channel occupation by itself, and currently, there is no effective rule.

In an exemplary implementation, fig. 1 is a flowchart of a channel occupancy time determination method provided in this embodiment, which may be applied to a case of determining a COT used for data transmission, where the method may be performed by a channel occupancy time determination apparatus, which may be performed by software and/or hardware and integrated on a first communication node, and the first communication node may be a node in direct communication with a second communication node. Illustratively, the first communication node may be a UE and the second communication node may be a base station.

As shown in fig. 1, the method for determining a channel occupation time provided by the present application includes S110 and S120.

S110, under the condition that the first communication node does not initiate channel occupation, information sent by a second communication node is detected.

In this embodiment, the first communication node may determine the COT for data transmission by detecting information sent by the second communication node. The detected information may be unicast service data; or may be group control signaling; control signaling is also possible. The unicast service data comprises one or more of the following data: physical uplink shared channel data; physical downlink shared channel data; physical uplink control channel data; physical downlink control channel data. The group control signaling may be control information sent by one device to another device, and the control signaling may be control information sent by one device to another device.

And S120, determining the channel occupation time COT for data transmission according to the detection result.

After detecting the data sent by the second communication node, this step may determine the COT used for data transmission according to the detection result. The detection result may comprise that the information sent by the second communication node comprises unicast traffic data, or comprises group control signaling, or comprises control signaling.

Different detection results may determine different COTs for data transmission, and are not limited herein.

In one example, in a case that the information sent by the second communication node includes unicast traffic data as a result of the detection, the first communication node may share the COT of the second communication node for data transmission.

In one example, where the information sent by the second communication node comprises group control signaling, the first communication node may share the COT of the second communication node for data transmission.

In one example, where the information sent by the second communications node comprises group control signalling, the first communications node may determine the COT to be used for data transmission based on the content indicated by the group control signalling.

In one example, in the case that the information sent by the second communication node includes group control signaling but the first communication node fails to detect the group control signaling, the second communication node is not shared to initiate a channel to occupy a corresponding COT for data transmission; or sharing the second communication node to initiate the channel to occupy the corresponding COT under the condition of detecting the unicast service data sent by the second communication node; alternatively, it is determined whether the initiating channel occupancy condition is met by the first communication node to determine the COT for data transmission.

According to the method for determining the channel occupation time, under the condition that the first communication node does not initiate channel occupation, information sent by the second communication node is detected; and determining the channel occupation time COT for data transmission according to the detection result, and effectively determining the COT for data transmission of the first communication node.

On the basis of the above-described embodiment, a modified embodiment of the above-described embodiment is proposed, and it is to be noted herein that, in order to make the description brief, only the differences from the above-described embodiment are described in the modified embodiment.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

In the case that the detection result is that the information sent by the second communication node includes unicast service data, the first communication node may share the COT included in the FFP that the second communication node initiates channel occupation, that is, the COT corresponding to the initiation channel occupation.

In one embodiment, the unicast traffic data includes one of:

physical uplink shared channel data; physical downlink shared channel data; physical uplink control channel data; physical downlink control channel data.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the information sent by the second communication node comprises the group control signaling, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

And under the condition that the detection result is that the information sent by the second communication node comprises the group control signaling, the first communication node can share the COT corresponding to the channel occupation initiated by the second communication node for data transmission.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

and sharing the COT corresponding to the channel occupation initiated by the second communication node for data transmission under the condition that the information sent by the second communication node comprises a group control signaling and the group control signaling indicates that the length of the residual COT is greater than 0, wherein the first communication node does not initiate the channel occupation in the COT corresponding to the channel occupation initiated by the second communication node, and the second communication node is initiating equipment.

In this embodiment, in the case that the detection result is that the information sent by the second communication node includes the group control signaling, the COT used by the first communication node for data transmission may be further determined based on the content indicated by the group control signaling. Illustratively, in case the group control signaling indicates that the length of the remaining COT is greater than 0, the shared second communication node initiates channel occupation of the corresponding COT for data transmission.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

In the case that the detection result is that the information sent by the second communication node includes the group control signaling, the present embodiment may further determine the COT for data transmission based on the content indicated by the group control information.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

The predefined row may be understood as a pre-agreed row, such as a row pre-agreed upon by the first communication node and the second communication node.

The predefined information indicates that a combination can be understood as a combination of a predefined row index and a corresponding row content. If the predefined row index is the first row, the corresponding row contents are empty.

Initiating a channel occupancy condition comprises a transmission starting position being aligned with an FFP starting position of a first communication node and a transmission ending position ending before an idle period of the FFP. For example, in the case that the transmission is a configuration grant transmission, the initiating channel occupation condition may be that a start position of the configuration grant transmission is aligned with a start position of the FFP, and an end position of the configuration grant transmission ends before an idle period of the FFP; in case the transmission is a dynamic grant transmission, the initiating channel occupancy condition may be that a start position of the dynamic grant transmission is aligned with a start position of an FFP of the first communication node and a transmission end position of the dynamic grant transmission ends before an idle period of the FFP.

The starting position and the ending position are both in the same FFP and do not span the FFP.

In one embodiment, the group control signaling includes downlink control information format 2_ 0.

In one embodiment, the channel occupation time determination method includes one of the following steps:

the second communication node transmitting the group control signaling at a COT start position of a Fixed Frame Period (FFP) of the second communication node;

and the second communication node sends the group control signaling in a first transmission cluster transmitted at the COT starting position of the FFP of the second communication node.

The transmission cluster may be a transmission set of the same device, where the transmission set includes multiple transmissions, and an interval between adjacent transmissions of the multiple transmissions is not greater than X microseconds, where X is a fixed value, for example, 16.

In one embodiment, the channel occupation time determination method includes one of the following steps:

the second communication node transmitting the group control signaling at a start position where the sharing of the COT is started;

and the second communication node sends the group control signaling in the first transmission cluster which starts to transmit at the starting position of the shared COT.

In one embodiment, the determining, according to the detection result, a channel occupancy time COT for data transmission includes:

In one embodiment, the method for determining the channel occupation time further includes:

In one embodiment, the determining the COT for the subsequent data transmission according to the group control signaling comprises:

In one embodiment, the method for determining the channel occupation time further includes:

in the case that the group control signaling indicates that the first communication node may share the COT of the second communication node, the first communication node may share the COT of the second communication node for data transmission,

in one embodiment, the method for determining the channel occupation time further includes:

In one embodiment, the determining the COT for the subsequent data transmission according to the group control signaling comprises:

In one embodiment, the method for determining the channel occupation time further includes:

sharing the COT of the second communication node for the dynamic grant transmission when the transmitted data is the dynamic grant transmission and the information sent by the second communication node includes a control signaling scheduling the dynamic grant transmission, and the control signaling indicates that the CCA type is listen-before-talk-free and the dynamic grant transmission is in the COT of the valid second communication node

The listen-before-talk-nothing control signaling indicates that the first communication node may transmit the dynamic grant transmission without performing a CCA.

In one embodiment, the method for determining the channel occupation time further includes:

In one embodiment, initiating a channel occupancy condition comprises:

the transmission start position is aligned with an FFP start position of the first communication node and the transmission end position ends before an idle period of the FFP.

In one embodiment, the method for determining the channel occupation time further includes:

The following describes an exemplary method for determining the occupied channel time, which may be regarded as a method for sharing and initiating the occupied channel time.

Under the condition that the data transmission starting position of the equipment is aligned with the starting position of the fixed frame period of the equipment and the data transmission is finished before the idle period of the fixed frame period, the equipment directly executes channel access to acquire the channel occupation time for transmission or share the channel occupation time of the initiating equipment for transmission, and an effective scheme does not exist at present; meanwhile, there is no scheme for avoiding that two devices communicating with each other simultaneously serve as initiating devices to cause that channel occupation time is simultaneously effective, that is, under the condition that both the UE and the base station can serve as initiating devices to initiate channel occupation, the problem of effective COT overlapping between the UE and the base station may occur, under the condition that effective COT overlapping exists, the transmission of the UE may use the COT initiated by the UE, or may use the COT initiated by the base station, because the length of the COT and the starting position of the two devices are different, the COT shared by the UE and the UE behavior corresponding to the occupation of the channel initiated by the UE itself may also be different, so that the COT used by the UE transmission needs to be indicated under the condition of UE transmission, or the condition that the COT overlapping between the UE and the base station occurs simultaneously is avoided; the method mainly determines a triggering condition for the device to initiate channel occupation and avoids overlapping effective COT caused by two devices communicating with each other simultaneously serving as initiating devices.

Example 1

A device operating in an FBE mode may be used as an initiating device, and may perform CCA detection in an idle period, where a CCA detection channel is idle, and may occupy a COT of a next FFP immediately adjacent to the idle period for data transmission, and a responding device of the initiating device may share the COT for data transmission. For example, if the base station performs CCA detection in an idle period as an initiating device, and a CCA detection channel is idle, the base station may occupy a COT of an immediately next FFP for data transmission, where a downlink transmission is first sent in the COT, and the remaining part of the COT may be shared with other responding devices of the base station, such as a UE. Under the condition that the base station initiates channel occupation, the response equipment UE can share the COT of the base station for data transmission; the data transmission starting position of the UE is aligned with the FFP starting position of the UE and the data transmission ends before the idle period of the FFP, so the UE can directly initiate channel occupation as an initiating device for the data transmission.

For a device operating in FBE mode, as a responding device, performing COT sharing for transmitting data of the responding device, or as an initiating device, initiating channel occupation and transmitting data of the initiating device using the initiated COT, the following scheme is provided:

scheme 1: a device 1, that is, a first communication node does not initiate channel occupation, when the device 1 detects a unicast service data sent by a device 2, that is, a second communication node, the device 1 regards that the device 2 initiates channel occupation and acquires a corresponding COT, the device 1 serves as a response device of the device 2, the response device may share the COT initiated by the initiating device (device 2) for transmitting the service data of the response device, and the response device does not initiate channel occupation within the COT of the initiating device; the unicast traffic data may be Physical Uplink Shared Channel (PUSCH) data, Physical Downlink Shared Channel (PDSCH) data, Physical Uplink Control Channel (PUCCH) data, Physical Downlink Control Channel (PDCCH) data, or other unicast data; the device 1 and the device 2 are two devices capable of communicating directly, for example, the device 1 is a UE, and the device 2 is a base station.

For example, a base station, as an initiating device, performs CCA detection in an idle period, and when a CCA detects that a channel is idle, the base station occupies a COT of an FFP immediately adjacent to the idle period for transmitting a PDSCH, and when a response device UE does not initiate channel occupancy, the UE considers that the base station initiates channel occupancy successfully after receiving the PDSCH, the UE may share the COT of the base station for Uplink (UL) data transmission, and the UE does not initiate channel occupancy within the COT of the base station.

Scheme 2: the method includes that a device 1 does not initiate channel occupation, when the device 1 detects a group control signaling sent by a device 2, the device 1 regards that the device 2 initiates channel occupation and acquires a corresponding COT, the device 1 serves as a response device of the device 2, the response device can share the COT initiated by the initiating device (device 2) for transmitting service data of the response device, and the response device does not initiate channel occupation in the COT of the initiating device; the device 1 and the device 2 are two devices capable of directly communicating, for example, the device 1 is a UE, and the device 2 is a base station; the group control signaling may be a Downlink Control Information (DCI) format 2_0, where the DCI format 2_0 includes a remaining COT length indication.

Further, when the device 1 detects a group control signaling sent by the device 2 and the group control signaling indicates that the remaining COT length is greater than 0, the device 1 regards the device 2 as initiating channel occupancy and obtains a corresponding COT, the device 1 serves as a response device of the device 2, and regards a current COT as the COT initiated by the initiating device (device 2), the response device may share the COT initiated by the initiating device for transmitting service data of the response device, and the response device does not initiate channel occupancy within the COT of the initiating device;

for example, a base station, as an initiating device, performs CCA detection in an idle period, and a CCA detection channel is idle, the base station occupies a COT of an FFP immediately adjacent to the idle period to send Downlink (DL) data, and the base station sends a DCI format 2_0 in the COT to notify that a remaining COT length is greater than 0; the UE receives that the remaining COT length indicated by DCI format 2_0 is greater than 0, considers that the base station initiates a COT in the configured FFP position, and the UE as a response device may share the COT for data transmission and may not initiate channel occupation within the configured COT of the base station.

Further, when the device 1 detects a group control signaling sent by the device 2 and the group control signaling indicates that the remaining COT length is 0, the device 1 regards that the device 2 initiates channel occupancy and acquires a corresponding COT, and then the device 1 serves as a response device of the device 2, regards that a current COT is a COT initiated by the initiating device (device 2), but the response device may not share the COT initiated by the initiating device for transmitting service data of the response device and the response device may not initiate channel occupancy within the COT of the initiating device;

further, when the device 1 detects a group control signaling sent by the device 2 and the group control signaling indicates that the remaining COT length is a predefined row, the device 1 regards that the device 2 shares a COT initiated by the device 3, and then the device 2 is a response device of the device 3, the device 1 does not share the COT of the device 2 for service data transmission of the device 1, and meanwhile, the device 1 may serve as an initiating device to directly initiate channel occupation for service data transmission of the device 1 under a condition that the initiating channel occupation is satisfied; the specific row refers to a row specifically having a specific row index, for example, row 1 or last row 1, and the specific row may also be a row having a specific information indication combination, for example, a row indicating that the COT remaining length information is empty, or a row 1 or last row 1 indicating that the COT remaining length is 0; the device 3 and the device 2 may communicate directly, for example, device 1 is UE1, device 2 is a base station, and device 3 is UE 2; the condition of satisfying initiation of channel occupancy is that a transmission start position of a device is aligned with an FFP start position of the device and an end position of the transmission ends before an idle period of the FFP.

For example, the UE1, the UE2, and the base station are configured with FFP, respectively, the base station does not initiate channel occupation in an idle period, or detects that a channel is busy in a CCA detection period and does not successfully initiate channel occupation, the UE2 performs CCA detection in a corresponding idle period, the CCA detection channel is idle and successfully initiates channel occupation; the COT of the UE2 shared by the base station is used for DL data transmission, where the DL data transmission includes DCI format 2_0, DCI format 2_0 indicates the remaining length of the COT through row 1 of the COT length indication list, and the row 1 indicates that the remaining COT length is 0; the UE1 receives the remaining COT length indicated by the DCI format 2_0 and the corresponding indicated row index, and considers that the base station shares the COT of other devices; the UL transmission of UE1 is aligned with the FFP start position configured to UE1 and ends before the idle period of the FFP, then UE1 may perform CCA detection attempt to initiate channel occupancy in the idle period immediately before the FFP, and may transmit the UL transmission using the COT initiated by UE1 after the initiation of channel occupancy is successful.

In this embodiment, a condition that a device serves as an initiating device or a responding device is determined, that is, when unicast data transmission is detected, or when a group control signaling is detected or a group control signaling is detected and the group control signaling indicates that the remaining COT length is greater than 0, the device serves as a responding device to share the COT of the initiating device for transmission; the device is divided into two cases when detecting that the length of the remaining COT indicated by the group control signaling is 0, wherein 1) the device communicating with the device is an initiating device, and the device does not initiate channel occupation in the effective COT of the initiating device; 2) if the device communicating with the device shares the COTs of other initiating devices, the device initiates channel occupation under the condition that the channel occupation is initiated.

Example 2

A device operating in an FBE mode may be used as an initiating device, and may perform CCA detection in an idle period, and when a CCA detection channel is idle, a COT of an immediately next FFP may be occupied for data transmission, and a responding device of the initiating device may share the COT for data transmission. For example, if the base station performs CCA detection in an idle period as an initiating device, and a CCA detection channel is idle, the base station may occupy a COT of an immediately next FFP for data transmission, where a downlink transmission is first sent in the COT, and the remaining part of the COT may be shared with other responding devices of the base station, such as a UE. Under the condition that the base station initiates channel occupation, the response equipment UE can share the COT of the base station for data transmission; the data transmission starting position of the UE is aligned with the FFP starting position of the UE and the data transmission ends before the idle period of the FFP, so the UE can directly initiate channel occupation as an initiating device for the data transmission.

Based on scheme 2 of embodiment 1, in the case that the device 2 sends the group control signaling, there are the following schemes:

scheme 1: as an initiating device, the device 2 transmits the group control signaling at the COT start position of FFP; as a responding device, the device 2 sends the group control signaling at the start COT position where the sharing of the device 3 starts;

scheme 2: as an initiating device, the device 2 sends the group control signaling in a first transmission cluster transmitted at a COT start position of FFP; as a responding device, the device 2 sends the group control signaling in the first transmission cluster that starts to share the COT start position transmission of the device 3; the transmission cluster is a transmission set of the same device, the transmission set includes a plurality of transmissions, an interval between adjacent transmissions of the plurality of transmissions is not greater than X microseconds, and X is a fixed value, for example, 16.

For example, the base station, as an initiating device, performs CCA detection in an idle period, and a CCA detection channel is idle, the base station occupies a COT of an FFP immediately adjacent to the idle period to send Downlink (DL) data, and the base station sends a DCI format 2_0 at a COT starting position to notify a remaining COT length, or sends a DCI format 2_0 in a first transmission cluster sent at the COT starting position to notify the remaining COT length.

The UE1, the UE2, and the base station are configured with FFP, respectively, the base station does not initiate channel occupation in an idle period, or does not successfully initiate channel occupation if a CCA detection channel in the idle period is busy, the UE2 performs CCA detection in a corresponding idle period, the CCA detection channel is idle, and successfully initiates channel occupation; the COT of the base station shared UE2 is used for DL data transmission, and the base station transmits DCI format 2_0 informing of the remaining COT length at the COT start position of the start shared UE2, or the base station transmits DCI format 2_0 informing of the remaining COT length in the first transmission cluster transmitted at the COT start position of the start shared UE 2.

When the device 1 detects the group control signaling sent by the device 2, there is a case that the group control signaling is not detected, and the solution under this case is as follows:

scheme 1: the device 1 does not detect the group control signaling sent by the device 2 in the COT, but when the device 1 detects unicast service data sent by the device 2 to the device 1, the device 1 is a responding device of the device 2, the responding device may share the COT initiated by the initiating device (device 2) for transmitting the service data of the responding device, and the responding device does not initiate channel occupation within the COT of the initiating device;

for example, when a base station, as an initiating device, performs CCA detection in an idle period, and a CCA detection channel is idle, the base station occupies a COT of an FFP immediately adjacent to the idle period for transmitting DL data, where the DL data transmission includes DCI format 2_0 and PDSCH, and a UE does not detect DCI format 2_0, but successfully detects PDSCH, the UE considers that the base station as the initiating device initiates the COT, and the UE may share the COT for UL data transmission of the UE.

Scheme 2: if the device 1 does not detect the group control signaling sent by the device 2 in the COT, the device 1 does not perform the sharing of the COT for the data transmission of the device 1, and meanwhile, does not initiate channel occupation for the data transmission of the device 1 in the COT; in the COT of the device 2, when the device 1 receives the group control signaling for the first time, determining, according to information indicated by the group control signaling and scheme 2 of embodiment 1, whether the device 1 shares the COT of the device 2 or the device 1, as an initiating device, initiates channel occupation for service data transmission of the device 1;

scheme 3: the device 1 does not detect the group control signaling sent by the device 2 in the COT, and the device 1 initiates channel occupation for data transmission of the device 1 under the condition that the initiation of channel occupation is satisfied; if the device 1, as an initiating device, successfully initiates channel occupation and then receives a group control signaling in the COT of the device 2, if the group control signaling determines that the device 1 should not initiate channel occupation according to scheme 2 of embodiment 1, the device 1 releases a subsequent use right of the COT initiated by the device 1 after receiving the group control signaling; if the group control signaling indicates that the device 1 may initiate channel occupation, the device 1 may continue to use the COT initiated by the device 1 for data transmission of the device 1; if the group control signaling indicates that the device 1 may share the COT of the device 2, the device 1 may be used for service data transmission of the device 1 by sharing the COT of the device 2, otherwise, the device 1 may not transmit data again in the COT of the device 2.

For example, a base station, as an initiating device, performs CCA detection in an idle period, and a CCA detection channel is idle, the base station occupies a COT of an FFP immediately adjacent to the idle period to send DL data, where the DL data transmission includes two DCI format 2_0 transmissions; the UE does not detect the transmission of a first DCI format 2_0, the UL data transmission of the UE is aligned with the FFP starting position configured to the UE, and the UL data transmission is finished before the idle period of the FFP of the UE, so that the UE is used as an initiating device to execute CCA detection in the idle period of the FFP close to the UE, and when a CCA detection channel is idle, the UE successfully initiates channel occupation and transmits the UL data transmission by using the COT; the UE detects DCI format 2_0 when a second DCI format 2_0 arrives, where DCI format 2_0 indicates that the UE should not initiate channel occupation, the UE terminates UL data transmission in the COT of the UE after receiving DCI format 2_0, and if DCI format 2_0 notifies that the UE can share the COT of the base station, the UE can share the COT of the base station for the UL data transmission.

This embodiment determines the sending location of the group control signaling in embodiment 1, and how the device determines the COT used for transmission of the device when the group control signaling is missed.

Example 3

The application also provides a configuration authorization data transmission method, which is applied to the first communication node and comprises the following steps:

when a first communication node does not initiate channel occupation, and data transmitted by the first communication node is configuration authorization data and meets the condition of initiating channel occupation, performing CCA detection in an idle period immediately before FFP of the first communication node;

when a CCA detection channel is idle, the first communication node successfully initiates channel occupation and transmits configuration authorization data by using a COT corresponding to the initiated channel occupation;

and sharing the COT transmission configuration authorization data of the second communication node under the condition that the CCA detection channel is busy, the next configuration authorization transmission opportunity is in the effective COT of the second communication node, and the first communication node can share the COT of the second communication node.

In one embodiment, the COT used to configure the grant transmission is notified at the same time the grant transmission is configured.

In one embodiment, in case a first communication node transmits a configuration grant transmission and the configuration grant transmission satisfies an originating channel occupancy condition, indicating a COT used by the configuration grant transmission by a configuration grant uplink control information CG-UCI;

under the condition that a first communication node transmits configuration authorization transmission and the configuration authorization transmission meets an initiating channel occupation condition, indicating a COT used by the configuration authorization transmission through a channel access priority class CAPC in COT sharing information in CG-UCI;

under the condition that a first communication node transmits a configuration authorization transmission and the configuration authorization transmission meets an initiating channel occupation condition, adding 1-bit information in CG-UCI for indicating a COT used by the configuration authorization transmission;

under the condition that a first communication node transmits a configuration authorization transmission and the configuration authorization transmission meets an initiating channel occupation condition, informing a COT (chip on chip) used by the configuration authorization transmission through a special combination of an offset value, a persistence length and a CAPC (control and accounting) domain in a CG-UCI (control and communications interface);

in the case where a first communication node transmits a configuration grant transmission and the configuration grant transmission satisfies an originating channel occupancy condition, a COT used by the configuration grant transmission is indicated by a particular row index in the CG-UCI.

The present embodiment is described below by way of example:

for a device 1 operating in FBE mode, if the start position of the configuration grant transmission of the device 1 is aligned with the start position of the FFP of the device 1 and the end position of the configuration grant transmission ends before the idle period of the FFP, the device 1 performs CCA detection to initiate channel occupation in the idle period immediately before the FFP,

scheme 1: if the CCA detection channel of the device 1 is idle, the device 1 successfully initiates channel occupation and uses the COT for transmission configuration authorization transmission;

scheme 2: if the CCA detection channel of the device 1 is busy, if the next configuration grant transmission opportunity of the device 1 is within the valid COT of the device 2 in direct communication with the device and the device 1 can share the COT of the device 2, the device 1 shares the COT of the device 2 as a responding device for transmitting the configuration grant transmission;

executing the device-initiated channel occupation under the condition that the configuration authorization transmission meets the initiation channel occupation, which may result in simultaneous existence of multiple initiating devices and effective COTs overlapping, in order to keep understanding of COTs used for the configuration authorization transmission among the communication devices consistent, the COTs used for the configuration authorization transmission need to be notified while the configuration authorization transmission is performed; further, the configuration authorization is a configuration authorized PUSCH (CG-PUSCH) transmission, and the COT used by the CG-PUSCH transmission is notified through CG-UCI; further, the COT used for the CG-PUSCH transmission is notified by configuring a Channel Access Priority Class (CAPC) in COT sharing information in a granted Uplink control information (CG-UCI), or 1-bit information is added to the CG-UCI for indicating the COT used for the CG-PUSCH transmission, or the COT used for the CG-PUSCH is notified by a special combination of an offset value, a duration and a CAPC field in the CG-UCI, or the COT used for the CG-PUSCH transmission is indicated by a specific row index in the CG-UCI.

In this embodiment, a scheme is provided for configuring authorization transmission for a specific scenario, where the configuration authorization transmission is aligned with an FFP start position of the device and ends before an idle period of the FFP, the device directly serves as an initiating device to initiate a COT for the configuration authorization transmission; when the device fails to initiate channel occupation as an initiating device, and a subsequent transmission opportunity is still in a COT of the initiating device communicating with the device, the device is converted into a responding device to share the COT of the initiating device for transmission; and how to keep the two communication parties to understand and agree with the COT used for transmission under the condition that the two communication parties are initiating devices, namely, the COT used for configuring the authorized transmission is explicitly indicated.

Example 4

The application also provides a dynamic authorization data transmission method, which is applied to the first communication node and comprises the following steps:

under the condition that the data transmitted by the first communication node is dynamic authorization data, if the dynamic authorization transmission is finished after the initial position of the first communication node FFP and before the idle period of the FFP, and the first communication node successfully initiates channel occupation before the dynamic authorization transmission, the dynamic authorization transmission is transmitted according to the initiated COT; otherwise, the first communication node is a responding device, the dynamic grant transmission is within the COT of the valid FFP of the initiating device and ends before the idle period of the FFP, and the dynamic grant transmission shares the COT of the initiating device for transmission.

The present application is described exemplarily below:

for a device operating in an FBE mode, if the device has initiated a COT before the dynamic grant transmission, the dynamic grant transmission is transmitted according to the COT initiated by the device; otherwise, the device is used as a response device, and if the dynamic grant transmission is within the COT of the valid FFP of the initiating device and ends before the idle period of the FFP, the dynamic grant transmission is used for transmission by sharing the COT of the initiating device.

For example, the dynamic grant transmission of the UE starts after the FFP of the UE and ends before the idle period of the FFP of the UE, and if the UE has initiated channel occupation before sending scheduling transmission and acquires the COT use right of the FFP, the UE transmits the dynamic grant transmission according to the FFP of the UE; otherwise, if the UE does not initiate channel occupation before sending the scheduling transmission and the dynamic grant transmission is within the effective COT of the base station, the dynamic grant transmission is used for transmission through the COT of the shared base station.

For a device operating in FBE mode, a dynamic grant transmission of the device is aligned with an FFP starting location of the device and ends before an idle period of the FFP,

scheme 1: scheduling a control signaling of dynamic grant transmission to indicate that a CCA type of the device is LBT-free, the device serving as a responding device, and if the responding device determines that the dynamic grant transmission is in a valid COT of an initiating device, the responding device sharing the COT of the initiating device for sending the dynamic grant transmission; whether the device needs to execute CCA in the COT process of the initiating device and the executed CCA type are determined according to the interval between the dynamic authorization transmission and the previous transmission in the COT; the LBT-free indicates for control signaling that the first communication node may transmit the dynamic grant transmission without performing CCA.

Scheme 2: scheduling a control signaling for dynamic grant transmission to indicate that the CCA type of the device is LBT, and the device serving as an initiating device initiates channel occupation for executing the dynamic grant transmission;

scheme 3: adding a 1-bit field in a control signaling for scheduling dynamic grant transmission to indicate that the device shares a COT of an initiating device or the device initiates channel occupation for sending the dynamic grant transmission.

In this embodiment, for a specific scenario dynamic scheduling grant transmission scheme, how to select a COT used for transmission when the dynamic grant transmission of the device is scheduled after the FFP start position of the device and aligned with the FFP start position of the device; and under the condition that the dynamic authorization transmission of the equipment is aligned with the FFP starting position of the equipment, determining whether the transmission of the equipment is used for transmission through the COT of the shared initiating equipment or through the COT initiated by the equipment according to the indication of the scheduling control signaling.

In an exemplary embodiment, the present application further provides a device for determining a channel occupation time, and fig. 2 is a schematic structural diagram of the device for determining a channel occupation time provided in the embodiment of the present application, where the device may be configured on a second communication node, and the device includes: the detection module 21 is configured to detect information sent by a second communication node when the first communication node does not initiate channel occupation; the determining module 22 is configured to determine the channel occupancy time COT for data transmission according to the detection result.

The device for determining channel occupation time provided in this embodiment is used to implement the method for determining channel occupation time in this embodiment, and the implementation principle and technical effect of the device for determining channel occupation time provided in this embodiment are similar to those of the method for determining channel occupation time in this embodiment, and are not described here again.

In one embodiment, the determination module 22 is configured to: