Terminal SRS Scheduling for Fair Positioning Transmission
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Solution Overview
Problem
There is currently no clear solution for how a terminal device, particularly reduced-capability (RedCap) devices, sends a sounding reference signal (SRS) to ensure transmission fairness and avoid conflicts with other signals or channels during positioning.
Innovation Solution
The terminal device determines, based on a first time window and resource configuration, whether to send an SRS, using a frequency hopping manner to increase bandwidth and ensure transmission fairness by configuring SRS resource sets and adjusting transmission resources to avoid conflicts with other signals or channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the terminal device sends SRS for positioning, then positioning precision is improved, but transmission conflicts with other signals or channels occur
Solution Approach 1:
The terminal device determines in advance whether to send the SRS by checking if the SRS resource falls within a time window configured by the network device. This preliminary determination prevents transmission conflicts before they occur, ensuring that positioning signals are sent only when they will not interfere with other signals or channels.
Solution Approach 2:
The solution introduces dynamic time window configuration, where the network device configures specific time windows during which SRS transmission is permitted. This dynamic control mechanism allows the system to adaptively manage resource allocation, enabling SRS transmission only in designated time periods to avoid conflicts with other uplink signals while maintaining positioning functionality.
2Measurement precision
If the terminal device uses frequency hopping for SRS transmission, then bandwidth is increased and positioning precision is improved, but device complexity increases
Solution Approach 1:
The terminal device implements frequency hopping by periodically switching between different frequency resources according to a predetermined pattern. This periodic frequency switching increases the effective bandwidth available for SRS transmission, improving positioning precision through better frequency diversity and signal quality without requiring permanently complex hardware.
Data Source
AI summary
Disclosed are a wireless communication method and a communications device. One example method includes: determining, by a terminal device based on first information, whether to send a first sounding reference signal (SRS) for positioning the terminal device, and the first information comprises one or more of following: a first time window, a resource configuration of the first SRS, or a resource configuration of a first signal or channel.