CN-116326050-B - Side-link carrier management method, device and system

Abstract

The application provides a method, a device and a system for managing side uplink carriers. The method comprises the steps that a first communication device obtains configuration information of a plurality of side link SL carriers, the first communication device determines at least one SL carrier from the plurality of SL carriers, and the first communication device sends a first message to a second communication device, wherein the first message comprises information of the at least one SL carrier. The side uplink carrier management method provided by the application determines at least one SL carrier for one unicast connection through the transmitting end communication device and indicates the at least one SL carrier to the receiving end communication device, thereby realizing the instant and effective management of the SL carrier and improving the efficiency and the system capacity of SL carrier communication.

Inventors

• PENG WENJIE

Assignees

• 华为技术有限公司

Dates

Publication Date

20260508

Application Date

20201130

Claims (20)

1. 1. A method of side-uplink carrier management, comprising: the first communication device receives configuration information of a plurality of side uplink SL carriers from a base station; The first communication device determines one SL carrier from the plurality of SL carriers as a main carrier PCC; The first communication device determines at least one SL carrier from the plurality of SL carriers as a secondary carrier SCC, wherein the PCC carries control information, and the control information is used for scheduling resources for transmitting data on the SCC; the first communication device sends a first message to a second communication device, wherein the first message comprises information of the PCC and information of the SCC, and the connection between the first communication device and the second communication device is unicast connection; The first communication device sends a third message to the base station, the third message including information of the PCC and information of the SCC.
2. 2. The method according to claim 1, wherein the method further comprises: The first communication device sends first information to the second communication device at the position of a first physical side uplink shared channel PSSCH resource, wherein the position of the first PSSCH resource is on a first SCC, and the first SCC is any one of the SCCs; The first communication device receives the HARQ feedback information of the first information at a location of a first physical side uplink feedback channel PSFCH resource, where the location of the first PSFCH resource is determined according to the location of the first PSSCH resource, and the location of the first PSFCH resource is on the first SCC.
3. 3. The method according to claim 1, wherein the method further comprises: The first communication device sends second information to the second communication device at the position of a second PSSCH resource, wherein the position of the second PSSCH resource is on a second SCC, and the second SCC is any one of the SCCs; the first communication device determining a location of a second PSFCH resource, the location of the second PSFCH resource on the PCC; The first communication device receives HARQ feedback information of the second information at the location of the second PSFCH resources.
4. 4. The method of claim 3, wherein the information of the SCC includes an index of the second SCC and an identification number of a resource pool in which the second PSSCH is located.
5. 5. The method of claim 4, wherein the first communication device determining the location of the second PSFCH resource comprises: The first communication device determines the position of the second PSFCH resource according to the position of the second PSSCH resource and at least one of the index of the second SCC and the resource pool identification number where the second PSSCH is located, or The first communication device determines the location of the second PSFCH resource according to the location of a physical side uplink control channel PSCCH resource, the PSCCH resource carrying a SCI indicating the location of the second PSCCH resource, the location of the PSCCH resource being on the PCC.
6. 6. The method of claim 5, wherein the PSCCH resource and the second PSFCH resource are in the same resource pool.
7. 7. The method according to any one of claims 1 to 6, further comprising: The first communication device determines that the time for switching between a first frequency band and a second frequency band is a first switching time, wherein the first frequency band and the second frequency band are frequency bands of the PCC and a third SCC, and the third SCC is any one of the SCCs; The first communication device receives a fourth message sent by the second communication device, wherein the fourth message comprises a second switching time, and the second switching time is the time for the second communication device to switch between a first frequency band and a second frequency band; The first communication device determines that a time interval is not less than a maximum value of the first switching time and the second switching time, the time interval being a time interval between an end time of a first resource and a start time of a second resource, the first resource belonging to the first frequency band, the second resource belonging to the second frequency band, and the first resource preceding a timing of the second resource.
8. 8. The method of claim 7, wherein the first resources comprise resources used by a PSCCH and the second resources comprise resources used by a PSCCH, and wherein SCI carried on the PSCCH is used to indicate a location of the resources used by the PSCCH.
9. 9. A method of side-uplink carrier management, comprising: the second communication device receives a first message sent by the first communication device, wherein the first message comprises information of a primary carrier PCC and information of a secondary carrier SCC, the PCC and the SCC are determined by the first communication device from a plurality of SL carriers, the PCC comprises one SL carrier, the SCC comprises at least one SL carrier, the PCC carries control information, the control information is used for scheduling resources for transmitting data on the SCC, and the connection between the first communication device and the second communication device is unicast connection.
10. 10. The method according to claim 9, wherein the method further comprises: the second communication device receives first information sent by the first communication device at the position of a first physical side uplink shared channel PSSCH resource, wherein the position of the first PSSCH resource is on a first SCC, and the first SCC is any one of the SCCs; The second communication device sends the HARQ feedback information of the first information at the position of the first PSFCH resource, where the position of the first PSFCH resource is determined according to the position of the first PSSCH resource, and the position of the first PSFCH resource is on the first SCC.
11. 11. The method according to claim 9, wherein the method further comprises: The second communication device receives second information sent by the first communication device at a position of a second physical side uplink shared channel PSSCH resource, wherein the second PSSCH is on a second SCC, and the second SCC is any one of the SCCs; The second communication device determining a location of a second PSFCH resource, the location of the second PSFCH resource on the PCC; and the second communication device sends the HARQ feedback information of the second information at the position of the second PSFCH resource.
12. 12. The method of claim 11, wherein the information of the SCC includes an index of the second SCC and an identification number of a resource pool in which the second PSSCH is located.
13. 13. The method of claim 12, wherein the second communication device determining the location of the second PSFCH resource comprises: The second communication device determines the position of PSFCH resources according to at least one of the position of the second PSSCH resources, the index of the second SCC and the resource pool identification number where the second PSSCH is located, or The second communication device determines the location of the second PSFCH resource according to the location of a physical side uplink control channel PSCCH resource, the PSCCH resource carrying a SCI for indicating the location of the second PSCCH resource, the location of the PSCCH resource being on the PCC.
14. 14. The method of claim 13, wherein the PSCCH resource and the second PSFCH resource are in the same resource pool.
15. 15. The method according to any one of claims 9 to 14, further comprising: The second communication device determines that the time for switching between a first frequency band and a second frequency band is a second switching time, wherein the first frequency band and the second frequency band are frequency bands of the PCC and a third SCC, and the third SCC is any one of the SCCs; The second communication device sending a fourth message to the first communication device, the fourth message including the second switching time; The second communication device performs message transmission between a first resource and a second resource and the first communication device, the first resource belongs to the first frequency band, the second resource belongs to the second frequency band, the time interval between the ending time of the first resource and the starting time of the second resource is not smaller than the maximum value of a first switching time and a second switching time before the time sequence of the second resource, and the first switching time is the switching time of the first communication device between the first frequency band and the second frequency band.
16. 16. The method of claim 15, wherein the first resources comprise resources used by a PSCCH and the second resources comprise resources used by a PSCCH, and wherein SCI carried on the PSCCH is used to indicate a location of the resources used by the PSCCH.
17. 17. A method of side-uplink carrier management, comprising: the base station transmits configuration information of a plurality of side uplink SL carriers to the first communication device; the base station receives a message from the first communication device, where the message includes information of a primary carrier PCC and information of a secondary carrier SCC for unicast communication between the first communication device and the second communication device, the PCC and the SCC belong to the multiple SL carriers, the PCC includes one SL carrier, the SCC includes at least one SL carrier, and the PCC carries control information, where the control information is used to schedule resources for transmitting data on the SCC.
18. 18. A side-uplink carrier management apparatus comprising means or units for performing the method of any one of claims 1 to 8, or means or units for performing the method of any one of claims 9 to 16, or means or units for performing the method of claim 17.
19. 19. A communication device, comprising: A processor for executing a computer program stored in a memory to cause the communication device to perform the communication method of any one of claims 1 to 8, or to perform the communication method of any one of claims 9 to 16, or to perform the communication method of claim 17.
20. 20. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when run on a computer, causes the computer to perform the communication method of any of claims 1 to 8, or to perform the communication method of any of claims 9 to 16, or to perform the communication method of claim 17.

Description

Side-link carrier management method, device and system Technical Field The present application relates to the field of communications, and more particularly, to a method, apparatus, and system for side-uplink carrier management in the field of communications. Background In a wireless communication system, two communication apparatuses may communicate data via a network, or may communicate directly via a Side Link (SL) carrier without using a network device. One typical application scenario for SL communication is the internet of vehicles (vehicle to everything, V2X). In V2X, each vehicle is a communication device, and data transmission between two vehicles can be directly performed through SL, and no network is needed, so that communication delay can be effectively reduced. Communication between the current communication devices supports single SL carrier communication, i.e. one communication device can only send data to another communication device over one SL carrier. But the rate supported by a single carrier is limited and the transmission efficiency is low. The field of communications has therefore introduced schemes for multicarrier communication to boost the rate of data transmission. In a long term evolution (long term evolution, LTE) system, V2X performs multi-carrier communication through SL carrier aggregation (carrier aggregation, CA), but the LTE system only supports broadcast communication on SL carriers, so that an intra-carrier closed loop design is adopted to be compatible with a low-version communication device, and therefore, SL multi-carrier communication in the LTE system does not support cross-carrier scheduling, that is, transmission of each carrier on SL is performed independently. For example, the User Equipment (UE) 1 and UE2 perform multicarrier communication through SL carriers (component carrier, CC) 1 and SL CC2, the location of data on SL CC1 is indicated through side uplink control information (sidelink control information, SCI) on SL CC1, and the location of data on SL CC2 is indicated through SCI on SL CC 2. The UE needs to monitor the transmission channel on each carrier to know where all possible data is located. While new wireless (NR) systems support unicast communications on SL carriers, transmission efficiency is low if the intra-carrier closed loop design continues. In addition, the base station cannot sense the communication condition between the communication devices, and the base station cannot timely and accurately manage the SL carriers, so that the transmission efficiency between the communication devices is affected. Therefore, how to realize SL carrier and time-efficient management for SL unicast communication and to improve transmission efficiency between communication devices is a problem to be solved. Disclosure of Invention The application provides a side uplink carrier management method, a device and a system, which can realize the instant and effective management of SL carriers and improve the efficiency and the system capacity of SL carrier communication. In a first aspect, a method of side-link carrier management is provided, which is performed by a first communication device, which may be, for example, a transmitting end User Equipment (UE) in a unicast connection. The method includes a first communication device obtaining configuration information of a plurality of side-link SL carriers, the first communication device determining at least one SL carrier from the plurality of SL carriers, the first communication device sending a first message to a second communication device, the first message including information of the at least one SL carrier. Through the technical scheme, the first communication device firstly acquires available SL resources, then determines at least one SL carrier from the SL resources as a communication carrier, and then indicates the at least one SL carrier to the second communication device, wherein the second communication device is an opposite communication device of the first communication device in a unicast connection. Because the first communication device can directly sense the link condition of the unicast connection between the first communication device and the second communication device, the first communication device manages the SL carrier of the unicast connection more timely and effectively, thereby being beneficial to improving the efficiency and the system capacity of SL carrier communication. Optionally, the configuration information of the plurality of SL carriers includes carrier frequency information, resource pool configuration information, and at least one of subcarrier spacing, bandwidth, and synchronization configuration information of the plurality of SL carriers. Optionally, the first communication device acquires configuration information of a plurality of SL carriers of the side uplink SL, wherein the first communication device acquires the configuration information of the plurality of SL carriers