US-12628207-B2 - Parameter transmission method and apparatus

Abstract

Embodiments of this application provide a parameter transmission method and an apparatus, and relate to the field of wireless communication technologies. In the method, the terminal device may receive first information. The first information may include a time parameter. The time parameter may be used to determine a timing offset. The timing offset includes a second timing offset, and the second timing offset indicates a delay of activation of configuration information. The terminal device determines a delay start duration of a random access response (RAR) window based on the second timing offset.

Inventors

• Xiaolu Wang
• Hejia Luo
• Yinggang Du
• Rong Li
• Jun Wang

Assignees

• HUAWEI TECHNOLOGIES CO., LTD.

Dates

Publication Date

20260512

Application Date

20230714

Priority Date

20210115

Claims (20)

1. 1 . A parameter transmission method, comprising: receiving, by a first communication apparatus, first information, wherein the first information comprises a time parameter, the time parameter comprises a timing offset, and the timing offset indicates a delay of activation of configuration information received by the first communication apparatus; determining, by the first communication apparatus, a delaying duration of starting of a random access response (RAR) window based on the timing offset; detecting, by the first communication apparatus, in response to transmission of a msg1 or a msgA, a physical downlink control channel (PDCCH) in the RAR window based on the delaying duration of starting of the RAR window; and receiving, by the first communication apparatus, a random access response (RAR) based on the PDCCH.
2. 2 . The method according to claim 1 , wherein the delaying duration of starting of the RAR window is determined based on the timing offset and a timing advance value.
3. 3 . The method according to claim 2 , wherein the delaying duration of starting of the RAR window satisfies the following formula: RAR_window_delay=TA+K_mac, wherein RAR window_delay indicates delaying duration of starting of the RAR window, TA indicates the timing advance value, and K_mac indicates the timing offset.
4. 4 . The method according to claim 2 , wherein the timing advance value is a sum of a common timing advance value, a round-trip delay between a satellite and a terminal device, an offset, and a correction value, wherein the offset and the correction value are indicated by a second communication apparatus, or are specified in a communication protocol.
5. 5 . The method according to claim 1 , wherein the first information is carried in at least one of: a broadcast message, a radio resource control (RRC) message, a system information block (SIB) 1 or other system information (OSI).
6. 6 . The method according to claim 1 , further comprising: starting, by the first communication apparatus, a random access contention resolution timer based on the delaying duration of starting of the RAR window.
7. 7 . The method according to claim 1 , wherein the RAR window starts at an additional duration after a first symbol of an earliest CORESET the first communication apparatus is configured to receive PDCCH that is after a last symbol of a physical random access channel (PRACH) occasion or physical uplink shared channel (PUSCH) occasion corresponding to a PRACH transmission; wherein the additional duration is the delaying duration of starting of the RAR window.
8. 8 . The method according to claim 1 , wherein the timing offset is related to a round-trip delay between a reference point and a gateway station.
9. 9 . The method according to claim 1 , wherein the configuration information is a media access control (MAC) signaling.
10. 10 . A parameter transmission method, comprising: determining, by a second communication apparatus, first information; and sending, by the second communication apparatus, the first information to a first communication apparatus, wherein the first information comprises a time parameter, the time parameter comprises a timing offset, the timing offset is used to determine a delay of activation of configuration information sent by the second communication apparatus, and the timing offset is used to determine a delaying duration of starting of a random access response (RAR) window, wherein the RAR window is usable for detecting a physical downlink control channel (PDCCH), that is usable for receiving a random access response (RAR).
11. 11 . The method according to claim 10 , wherein the time parameter further comprises a common timing advance value, wherein the common timing advance value is used to determine the delaying duration of starting of the RAR window together with the timing offset.
12. 12 . The method according to claim 10 , wherein the first information is carried in at least one of: a broadcast message, a radio resource control (RRC) message, a system information block (SIB) 1 or other system information (OSI).
13. 13 . The method according to claim 10 , wherein the delaying duration of starting of the RAR window is used to start a random access contention resolution timer.
14. 14 . The method according to claim 10 , wherein the configuration information is a media access control (MAC) signaling.
15. 15 . A first communication apparatus, comprising a communication interface and at least one processor, wherein the communication interface is configured to receive first information, the first information comprises a time parameter, the time parameter comprises a timing offset, and the timing offset indicates a delay of activation of configuration information received by the first communication apparatus; the at least one processor is configured to determine a delaying duration of starting of a random access response (RAR) window based on the timing offset; detecting, in response to transmission of a msg1 or a msgA, a physical downlink control channel (PDCCH) in the RAR window based on the delaying duration of starting of the RAR window; and receiving a random access response (RAR) based on the PDCCH.
16. 16 . The first communication apparatus according to claim 15 , wherein the delaying duration of starting of the RAR window is determined based on the timing offset and a timing advance value.
17. 17 . The first communication apparatus according to claim 16 , wherein the delaying duration of starting of the RAR window satisfies the following formula: RAR window_delay=TA+K_mac, wherein RAR window_delay indicates the delaying duration of starting of the RAR window, TA indicates the timing advance value, and K_mac indicates the timing offset.
18. 18 . The first communication apparatus according to claim 16 , wherein the timing advance value is a sum of a common timing advance value, a round-trip delay between a satellite and a terminal device, an offset, and a correction value, wherein the offset and the correction value are indicated by a second communication apparatus, or are specified in a communication protocol.
19. 19 . The first communication apparatus according to claim 15 , wherein the first information is carried in at least one of a broadcast message, a radio resource control (RRC) message, a system information block (SIB) 1 or other system information (OSI).
20. 20 . The first communication apparatus according to claim 15 , the at least one processor is configured to: start, based on the delaying duration of starting of the RAR window, a random access contention resolution timer.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of International Application No. PCT/CN2022/071412, filed on Jan. 11, 2022, which claims priority to Chinese Patent Application No. 202110055050.X, filed on Jan. 15, 2021. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties. TECHNICAL FIELD This application relates to the field of wireless communication technologies, and in particular, to a parameter transmission method and an apparatus. BACKGROUND With development of terrestrial communication, convenient data and voice services have been provided for urban, suburban, and rural users. However, some sparsely populated areas or areas that are not suitable for living are not covered by a communication network, and voice and data services cannot be provided for users in these areas. Non-terrestrial network (NTN) communication has features such as a large coverage area and flexible networking. The NTN communication includes satellite communication, high altitude platform station communication, and air-to-ground (ATG) communication. If terrestrial and non-terrestrial networks are combined, a communication service of seamless coverage can be provided globally. Therefore, research is under way to adapt a 5G new radio (NR) technology to the NTN communication, to build a unified communication network for sky-air-ground communication. In the non-terrestrial network, a network device and a terminal device are far away from each other, and an altitude difference between the network device and the terminal device is tremendously large. As a result, a large round-trip delay exists between the terminal device and the network device. In the NTN communication, due to impact of a large delay and large delay compensation on a network side, a problem occurs, for example, an insufficient scheduling delay for uplink data on the network side, an insufficient feedback delay configured by the network side for the terminal device, or an insufficient timing delay for a downlink configuration to take effect. Therefore, the network device can indicate a timing-related parameter to the terminal device, to resolve the foregoing problem. For example, when the feedback delay configured by the network side for the terminal device is insufficient, the network side may indicate a timing-related parameter to the terminal device, to adjust a slot in which the terminal device sends feedback information, and increase a scheduling delay fed back by the terminal device, so as to provide a sufficient time length for the terminal device to perform timing advance adjustment. However, when the network device indicates the timing-related parameter to the terminal device, additional signaling overheads are required. In addition, to resolve the problem, for example, the insufficient scheduling delay for the uplink data on the network side, the insufficient feedback delay configured by the network side for the terminal device, or the insufficient timing delay for the downlink configuration to take effect, the network device needs to send a plurality of timing-related parameters to the terminal device, and signaling overheads are high. SUMMARY This application provides a parameter transmission method and an apparatus, to send a timing-related parameter to a terminal device, thereby reducing signaling overheads. According to a first aspect, a parameter transmission method is provided. The method may be performed by a terminal device, or may be performed by a chip having a function similar to that of a terminal device. In the method, the terminal device may receive first information. The first information may include a time parameter. The time parameter may be used to determine a timing offset. The timing offset herein includes at least one of a first timing offset and a second timing offset. The first timing offset may be used to determine a delay degree of sending information by the terminal device, or the first timing offset may be used to determine an advance degree of receiving information by the terminal device, and the second timing offset may be used to determine a delay degree of taking effect of configuration information received by the terminal device. Based on the foregoing solution, the terminal device can determine one of the first timing offset and the second timing offset based on the time parameter sent by a network device. This can resolve an insufficient scheduling delay for uplink data on a network side, an insufficient feedback delay configured by the network side for the terminal device, or an insufficient timing delay for a downlink configuration to take effect. In addition, the terminal device can determine the first timing offset and the second timing offset based on the time parameter, to reduce signaling overheads. In a possible implementation, the time parameter is further used to determine delay start duration of a random access RAR window. The delay st