5G ProSe Localization for Out-of-Coverage UE Groups
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Solution Overview
Problem
Current wireless communication systems lack a means to support ProSe-based location estimation and assistance data for groups or sets of user equipments (UEs), particularly in out-of-coverage scenarios, leading to inefficiencies and increased signaling overhead.
Innovation Solution
Implementing 5G ProSe direct communication and UE-to-Network relaying to share location information between remote UEs and the 5G core, utilizing a reference UE to orchestrate localization and enhance privacy indication mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If traditional localization methods are used for each UE individually, then localization accuracy is maintained, but signaling overhead increases and coverage is limited to in-coverage scenarios
Solution Approach 1:
The patent merges localization requests from multiple UEs into a single group-based localization procedure. The network performs one localization measurement for the group rather than individual measurements for each UE, significantly reducing signaling overhead while maintaining localization capability. This is achieved by introducing group-based localization identifiers and consolidating measurement reports.
Solution Approach 2:
The patent introduces a group localization identifier as an intermediary element that mediates between individual UEs and the network localization function. This identifier allows the network to recognize and handle multiple UEs as a group, enabling efficient resource allocation and measurement consolidation without requiring individual UE identification in every signaling message.
2Area of stationary object
If ProSe direct communication is implemented for out-of-coverage UEs, then coverage range is extended, but device complexity increases
Solution Approach 1:
The patent segments the localization functionality into network-controlled procedures for in-coverage UEs and simplified peer-to-peer procedures for out-of-coverage UEs. The out-of-coverage localization uses pre-configured parameters and simplified measurement procedures, reducing the computational and processing complexity at the UE side while still enabling localization functionality.
Solution Approach 2:
The patent implements preliminary configuration of ProSe parameters, resources, and procedures before UEs enter out-of-coverage scenarios. By pre-configuring localization parameters, measurement configurations, and reporting formats while the UE is still in coverage, the actual out-of-coverage operation becomes simpler and requires fewer real-time decisions, thereby reducing operational complexity.
3Productivity
If location information is shared among UEs for group localization, then localization efficiency improves, but privacy concerns increase
Solution Approach 1:
The patent applies different quality levels of location information sharing based on the specific localization scenario and UE preferences. Instead of uniform location sharing, the system allows UEs to specify their location privacy preferences and shares only the necessary level of location information (e.g., group-level vs. individual-level precision) required for the localization task, thereby maintaining efficiency while respecting privacy constraints.
Solution Approach 2:
The patent uses group localization identifiers as copies or proxies for individual UE identities in localization signaling. Rather than transmitting actual UE identities or detailed location information, the system uses anonymized group identifiers that allow localization functionality to operate while protecting individual UE privacy. The actual location data remains protected and is only revealed to authorized network functions when necessary.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Specifically, the disclosure relates to a method of conducting localisation based on ProSe for a set of UEs in a 5G network comprising the set of UEs, an AMF, LMF, and a ProSe AS by initiating a 5G ProSe direct communication between UEs of the set of UEs and a reference UE, to relay location information from a remote UE, included in the set of UEs, via the reference UE and a 5G core, 5GC, entity for example the LMF. The method includes registering, by the set of UEs, ProSe capabilities thereof with the AMF, wherein the role of the reference UE is fulfilled by a PRU. Further, the method includes starting, by the LMF, localisation procedures.