Sidelink Positioning Apparatus Selection for Wireless UEs
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Solution Overview
Problem
The dynamic nature of sidelink positioning in wireless communications leads to frequent Anchor UE and Server UE discovery and selection processes, resulting in increased signaling overhead, latency, and potential degradation in location estimation accuracy.
Innovation Solution
Implementing techniques that allow Target UE and location servers to maintain sets of active and inactive Anchor UE and Server UE, using sidelink positioning protocol messages to exchange information and pre-select candidate UEs, thereby reducing the frequency of discovery and selection processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If frequent Anchor UE and Server UE discovery and selection processes are performed, then the system can adapt to dynamic changes in sidelink positioning, but signaling overhead and latency increase
Solution Approach 1:
The patent applies preliminary action by having the location server pre-select and provide a set of candidate Anchor UEs and Server UEs to the Target UE before actual positioning is needed. This pre-selection process reduces the frequency of discovery and selection operations during dynamic changes, thereby lowering latency while maintaining adaptability through the pre-provided candidate sets.
2Measurement precision
If frequent Anchor UE and Server UE discovery and selection processes are performed, then the system can ensure accurate positioning, but signaling overhead increases
Solution Approach 1:
The location server performs preliminary selection of candidate Anchor UEs and Server UEs and provides this pre-selected set to the Target UE. This eliminates the need for frequent discovery and selection signaling during dynamic changes, reducing signaling overhead while maintaining positioning accuracy through the pre-validated candidate sets.
Solution Approach 2:
The patent implements feedback mechanisms where the Target UE reports positioning information and connection status to the location server, which then updates the candidate sets accordingly. This feedback loop ensures positioning accuracy remains high while reducing the need for frequent discovery processes, thereby lowering signaling overhead.
3Adaptability or versatility
If frequent UE discovery and selection events are performed, then the system responds to network changes, but location estimation accuracy degrades
Solution Approach 1:
The patent applies preliminary action by pre-selecting candidate Anchor UEs and Server UEs based on network conditions before positioning operations. This pre-selection reduces the frequency of discovery and selection events during network changes, thereby maintaining location estimation accuracy while still responding to network changes through the updated candidate sets provided by the location server.
Data Source
AI summary
Various aspects of the present disclosure relate to selection of apparatus for sidelink positioning. A user equipment (UE) (e.g., a sidelink positioning target UE) receives from a first apparatus a first sidelink positioning protocol message including information for selecting a first set of one or more second apparatus for sidelink positioning. The UE can select from the first set of one or more second apparatus, a subset of the one or more second apparatus for sidelink positioning. The UE can transmit, to the first apparatus, a second sidelink positioning protocol message comprising information pertaining to the subset of the one or more second apparatus that can be used for determining a position of the UE.