Zone-Based Sidelink Location Exchange for Lower Overhead
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently transmitting and synchronizing location information between terminals in sidelink communication, particularly in scenarios requiring enhanced mobile broadband, massive Machine Type Communication (mMTC), Ultra-Reliable and Low Latency Communication (URLLC), and vehicle-to-everything (V2X) communication.
Innovation Solution
The method employs zone IDs and block IDs to identify and transmit absolute and relative location information between terminals, enabling synchronization and link connection in sidelink communication, with adjustments based on channel environment and travel speed, and using different formats for absolute and relative location information transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If absolute location information is transmitted between terminals in sidelink communication, then location accuracy is improved, but transmission overhead and complexity increase
Solution Approach 1:
The patent segments location information transmission into two parts: zone ID (coarse location) and relative location offset (fine location adjustment). Terminals first exchange zone IDs to establish basic location context, then optionally transmit smaller relative offset values for precise location updates. This segmentation reduces the bit length of location messages while maintaining accuracy, directly resolving the contradiction between location precision and transmission overhead.
2Reliability
If location information is frequently updated to maintain synchronization, then communication reliability is improved, but latency and energy consumption increase
Solution Approach 1:
The patent implements periodic location information updates combined with event-triggered updates. Terminals periodically exchange location information at predetermined intervals and also update when specific events occur (e.g., zone changes, synchronization requirements). This periodic action ensures reliable location synchronization while avoiding excessive updates that would increase latency and energy consumption, balancing reliability with time efficiency.
3Productivity
If relative location information is used instead of absolute location, then transmission efficiency is improved, but location precision may be compromised
Solution Approach 1:
The patent employs a nested structure where relative location offset information is embedded within the context of absolute zone ID. The zone ID provides the coarse absolute location framework, while the relative offset (nested within) provides fine-grained precision adjustments. This nesting allows the system to achieve both transmission efficiency (through compact relative offset encoding) and location precision (through the combination of absolute zone context and relative adjustment), resolving the contradiction between these two parameters.
Data Source
AI summary
The present disclose a method for delivering location information by a first terminal of a wireless communication system, the method comprising: delivering, by the first terminal, absolute location information during a process of performing link connection with a second terminal, wherein the absolute location information is information calculated based on a zone ID of the first terminal; setting a preset region based on the zone ID of the first terminal and assigning a zone index to each zone within the preset region; receiving, from the second terminal, relative location information corresponding to a location of the second terminal, wherein the relative location information is index information of a zone in which the second terminal is located based on the assigned zone index; and performing, by the first terminal and the second terminal, the link connection and performing sidelink communication.