NTN Timing Advance Reporting for Random Access Overhead Control
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Solution Overview
Problem
In non-terrestrial networks (NTN), the network device cannot accurately determine the uplink timing advance (TA) of terminals due to the lack of precise location information, leading to inefficiencies in resource allocation and synchronization.
Innovation Solution
A method for timing advance reporting in NTN, where a terminal receives indication information from a network device to determine whether to report uplink TA information in random access messages, and the network device dynamically controls this reporting to optimize resource usage and synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal always reports UL TA information in random access messages, then the network device can obtain accurate timing synchronization, but the signaling overhead and resource consumption increase
Solution Approach 1:
The patent implements dynamic TA reporting by introducing indication information that allows the network device to flexibly control whether the terminal reports TA information in each random access procedure. This dynamic mechanism adapts to different scenarios: when precise timing is needed, reporting is enabled; when not needed, reporting is disabled to save resources.
Solution Approach 2:
The patent changes the parameter of TA reporting from a fixed state (always report) to a controllable state (report or skip based on indication). The indication information acts as a parameter switch that modifies the terminal's behavior, allowing the system to optimize between synchronization accuracy and resource consumption based on current network conditions.
2Measurement precision
If the terminal reports UL TA information in every random access message, then the network device maintains accurate uplink timing, but the scheduling delay increases due to processing overhead
Solution Approach 1:
The dynamic indication mechanism allows the network device to adjust TA reporting requirements in real-time. When timing accuracy is critical, the network can request reports; when not critical, it can skip requests, thereby reducing processing overhead and scheduling delays dynamically matched to actual needs.
Solution Approach 2:
The patent extracts the TA reporting function from being a mandatory constant operation and makes it conditional. By using indication information to selectively enable or disable reporting, the system removes unnecessary reporting operations, thereby reducing processing time and scheduling delays while maintaining accuracy only when needed.
3Reliability
If the network device requests TA information frequently, then the timing synchronization is maintained, but the resource consumption and network load increase
Solution Approach 1:
The patent changes the reporting frequency parameter from fixed (frequent) to variable (controllable via indication). The network device can adjust the indication information to request TA reports only when necessary, optimizing the balance between synchronization reliability and resource consumption based on current network conditions and terminal behavior.
Solution Approach 2:
The system implements dynamic control over TA reporting frequency through indication information. Rather than continuously requesting reports, the network device dynamically decides when reporting is needed, reducing overall network resource consumption while maintaining synchronization reliability through targeted requests.
Data Source
AI summary
The disclosure discloses a method for timing advance (TA) reporting in a non-terrestrial network (NTN), a method for TA receiving in an NTN, and a device. The method for TA reporting in the NTN includes the following. Indication information is received from a network device, where the indication information indicates whether the terminal reports uplink (UL) TA information in a UL message in a random access procedure or whether the terminal is allowed to report the UL TA information in the UL message in the random access procedure. The terminal reports or skips reporting the UL TA information in the UL message in the random access procedure according to the indication information.