Core Network Request Routing for SRS Position Continuity
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Solution Overview
Problem
Current methods for determining a terminal's location using sounding reference signals (SRS) face interruptions during cell handover, as the core network cannot timely acquire measurement results from the target base station, leading to position service disruptions.
Innovation Solution
A request sending method is implemented where the core network sends acquisition requests to both the current and target base stations, allowing the target base station to configure and measure SRS, ensuring timely measurement result acquisition and location determination post-handover.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the core network only sends acquisition requests to the current base station, then the device complexity is reduced, but the position service continuity deteriorates during cell handover
Solution Approach 1:
The core network proactively sends acquisition requests to both the current base station and the target base station before the handover is completed. This preliminary action ensures that the target base station is already prepared to provide measurement results immediately after handover, preventing position service interruptions while maintaining manageable complexity through automated request routing.
2Reliability
If the core network sends acquisition requests to both current and target base stations, then the position service continuity is improved, but the device complexity increases
Solution Approach 1:
The base station acts as an intermediary that receives acquisition requests from the core network and automatically routes them to the appropriate terminal. This intermediary role simplifies the core network's operation by eliminating the need for it to directly manage complex handover coordination with multiple base stations, while still enabling continuous position service through the target base station's preparedness.
3Device complexity
If the measurement result acquisition is delayed during handover, then the device complexity is reduced, but the position determination timeliness deteriorates
Solution Approach 1:
The core network sends acquisition requests to the target base station in advance, before the handover is executed. This allows the target base station to prepare the measurement infrastructure and be ready to immediately provide measurement results after handover, eliminating delays in position determination while keeping the handover coordination simple through automated request routing.
Data Source
AI summary
The disclosure relates to a request sending method, including: sending a first acquisition request for acquiring position information of a terminal to a first base station corresponding to a cell where the terminal is currently located; and in response to determining, according to response information of the first acquisition request, a cell to which the terminal is to be handed over, sending a second acquisition request for acquiring position information of the terminal to at least one base station corresponding to at least one target cell to which the terminal is to be handed over.