Sidelink Positioning Procedures for Multi-UE Location Services
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Solution Overview
Problem
The procedural aspects of sidelink positioning and ranging in wireless communication networks, particularly in 5G systems, are not yet fully formalized, leading to inefficiencies in obtaining location information for multiple User Equipments (UEs) using sidelink communications.
Innovation Solution
The implementation of enhanced procedures for Mobile Originated Location Request (MO-LR) and Mobile Terminated Location Request (MT-LR), including periodic or triggered MT-LR, which allow a Location Management Function (LMF) to assist in sidelink positioning and ranging for a group of UEs, enabling location information to be obtained and provided to the UEs or a Location Service Client/Application Function, with capabilities for interaction with one UE and preference indication by the LCS Client or AF.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional sidelink positioning procedures are used for multiple UEs, then location information can be obtained, but the process is inefficient and not fully formalized
Solution Approach 1:
The patent segments the location request process into distinct types: Mobile Originated Location Request (MO-LR) initiated by UEs, and Mobile Terminated Location Request (MT-LR) initiated by network or external clients. Each type has standardized procedures for handling multiple UEs, enabling efficient batch processing while maintaining clear procedural boundaries.
Solution Approach 2:
The enhanced procedures provide universal handling mechanisms that work for both single UE and multiple UE scenarios. The location server can process location requests for groups of UEs using the same standardized framework, eliminating the need for separate procedures for different UE counts and reducing overall system complexity.
2Quantity of substance
If location requests are processed for multiple UEs, then comprehensive location information is obtained, but processing time increases
Solution Approach 1:
The patent enables preliminary capability information exchange between UEs and location servers before actual location measurement. UEs can indicate their positioning capabilities and requirements in advance, allowing the location server to optimize processing strategies and reduce measurement time when actual location requests are received.
Solution Approach 2:
The enhanced procedures support continuous location services through periodic or triggered MT-LR mechanisms. Once location information is obtained for multiple UEs, the system can maintain continuous updates without requiring complete re-measurement, reducing processing time for subsequent location requests while maintaining comprehensive coverage.
3Reliability
If standardized procedures are implemented, then network-assisted location services are improved, but procedural formalization is required
Solution Approach 1:
The patent introduces standardized intermediary procedures between UEs and location servers that facilitate reliable network-assisted location services. These standardized interfaces enable consistent interaction patterns, improving reliability while the formalization itself becomes part of the system architecture rather than an additional complexity layer.
Data Source
AI summary
Embodiments provide for enhanced procedures for a Mobile Originated Location Request (MO-LR), Mobile Terminated Location Request (MT-LR) and periodic or triggered MT-LR that may be used to enable sidelink positioning and ranging location results to be obtained for a group of two or more UEs with assistance from an LMF and to be provided to the group of UEs (MO-LR) or to an LCS Client or AF (MT-LR or periodic or triggered MT-LR). The enhancements allow the LMF to interact with just one UE of the group of UEs and for an LCS Client or AF to indicate a preference for the one UE.