Information sending method and apparatus, information receiving method and apparatus, and communication device and storage medium

By designing a dedicated first preamble for terminals without positioning capabilities, the problem of time-slot interference between terminals in non-terrestrial networks without positioning capabilities is solved, thereby improving the success rate of random access.

WO2026156544A1PCT designated stage Publication Date: 2026-07-30BEIJING XIAOMI MOBILE SOFTWARE CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
Filing Date
2025-01-22
Publication Date
2026-07-30

AI Technical Summary

Technical Problem

In non-terrestrial networks, terminals without positioning capabilities struggle to perform accurate compensation, leading to time slot interference and affecting the success rate of random access.

Method used

Random access is achieved by employing a first preamble specifically designed for terminals without location capabilities, including the design of a cyclic prefix (CP), a sequence number (SEQ), and a guard time (GP), ensuring that the terminal can successfully access the network even without location capabilities.

Benefits of technology

It alleviates the time-slot interference problem when terminals without positioning capabilities attempt random access under conditions where precise compensation is difficult, and improves the access success rate.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN2025074027_30072026_PF_FP_ABST
    Figure CN2025074027_30072026_PF_FP_ABST
Patent Text Reader

Abstract

The present disclosure relates to the technical field of communications, and specifically relates to an information sending method and apparatus, an information receiving method and apparatus, and a communication device and a storage medium. The information sending method comprises: when a terminal has no positioning capability, initiating random access by means of a first preamble, wherein the first preamble is exclusively used for a terminal having no positioning capability to execute random access. In the present disclosure, a terminal having no positioning capability can initiate random access by means of a first preamble, and the first preamble is exclusively used for a terminal having no positioning capability to perform random access, thereby facilitating the alleviation of the problem of inter-slot interference that occurs when the terminal having no positioning capability performs random access in a situation where it is difficult to perform precise compensation.
Need to check novelty before this filing date? Find Prior Art

Claims

1. A method for sending information, characterized in that, The method, executed by a terminal, includes: In the absence of positioning capability of the terminal, random access is initiated through a first preamble, wherein the first preamble is specifically used for terminals without positioning capability to perform random access.

2. The method according to claim 1, characterized in that, The first preamble includes at least one of the following: Cyclic prefix CP; sequenceSEQ; Protection Time (GP).

3. The method according to claim 2, characterized in that, The first preamble also includes at least one of the following: Set the first time period before the CP; Set in the second time period following the GP.

4. The method according to claim 2, characterized in that, The length of the CP of the first preamble is greater than the length of the CP of a traditional preamble.

5. The method according to claim 1, characterized in that, The first preamble comprises multiple re-transmitted conventional preambles.

6. The method according to any one of claims 1 to 5, characterized in that, The first preamble is a preamble of the new format.

7. The method according to any one of claims 1 to 6, characterized in that, Before initiating random access, the method further includes: Receive configuration information sent by the network device in the cell, wherein the configuration information is used to carry the configuration of the first preamble; or, If the configuration information is not received in the cell, it is determined that the cell does not support the access of the terminal without positioning capability.

8. The method according to claim 7, characterized in that, The configuration information also carries the configuration of a traditional preamble, or the configuration information is dedicated to carrying the configuration of the first preamble.

9. The method according to any one of claims 1 to 8, characterized in that, The terminal is a terminal in a non-terrestrial network.

10. The method according to claim 9, characterized in that, The method further includes: Compensation is provided for random access initiated via the first preamble based on the advance TA (Time Acquisition Target) mechanism, wherein the TA does not include the TA component determined by the terminal based on its own positioning capabilities.

11. The method according to claim 10, characterized in that, The TA includes a supplementary TA component, wherein the supplementary TA is determined based on the position of the satellite communicating with the terminal and the ground reference position.

12. The method according to claim 11, characterized in that, The supplementary TA is carried in the common TA component.

13. An information receiving method, characterized in that, Performed by a network device, the method includes: The receiving terminal initiates random access via a first preamble, wherein the terminal has no positioning capability, and the first preamble is specifically used for terminals without positioning capability to perform random access.

14. The method according to claim 13, characterized in that, The first preamble includes at least one of the following: Cyclic prefix CP; sequenceSEQ; Protection Time (GP).

15. The method according to claim 14, characterized in that, The first preamble also includes at least one of the following: Set the first time period before the CP; Set in the second time period following the GP.

16. The method according to claim 14, characterized in that, The length of the CP of the first preamble is greater than the length of the CP of a traditional preamble.

17. The method according to claim 13, characterized in that, The first preamble comprises multiple re-transmitted conventional preambles.

18. The method according to any one of claims 13 to 17, characterized in that, The first preamble is a preamble of the new format.

19. The method according to any one of claims 13 to 18, characterized in that, The method further includes: Configuration information is sent to the terminal, wherein the configuration information is used to carry the configuration of the first preamble.

20. The method according to claim 19, characterized in that, The configuration information also carries the configuration of a traditional preamble, or the configuration information is dedicated to carrying the configuration of the first preamble.

21. The method according to any one of claims 13 to 20, characterized in that, The terminal is a terminal in a non-terrestrial network.

22. A communication device, characterized in that, The communication device is configured to implement the information transmission method of any one of claims 1 to 12, and / or the information reception method of any one of claims 13 to 21.

23. A storage medium storing instructions, characterized in that, When the instruction is executed on the communication device, the communication device performs the information transmission method of any one of claims 1 to 12, and / or the information reception method of any one of claims 13 to 21.

24. A program product, characterized in that, When the above-described program product is executed by a communication device, the communication device performs the information transmission method according to any one of claims 1 to 12, and / or the information reception method according to any one of claims 13 to 21.