ProSe Discovery Location Reporting Optimization
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Solution Overview
Problem
Current methods for EPC-level ProSe discovery in wireless communication systems face challenges in accurately determining the proximity of User Equipments (UEs) without affecting UTRAN/GERAN and UMTS/GSM networks, particularly in scenarios where UEs camp on shared cells with different ECGIs, leading to inefficient location reporting and potential battery consumption.
Innovation Solution
A method for EPC-level ProSe discovery that utilizes the Home Subscriber Server (HSS) and Mobility Management Entity (MME) to request and acquire location information of UEs, determining proximity based on pre-configured distances and time windows, and optimizing location reporting to reduce unnecessary signaling and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If location information is continuously reported to determine UE proximity, then proximity determination accuracy is improved, but battery consumption increases due to unnecessary idle mode to connected mode transitions
Solution Approach 1:
The patent applies partial action by implementing a time window mechanism where location information is only reported when UEs are within a predetermined distance and time window, rather than continuously. This partial reporting approach maintains sufficient proximity determination accuracy while significantly reducing unnecessary idle mode to connected mode transitions and battery consumption.
Solution Approach 2:
The patent uses preliminary action by pre-configuring proximity determination parameters including predetermined distances and time windows before actual proximity detection. This allows the system to establish criteria in advance, avoiding unnecessary location reporting and mode transitions when UEs are unlikely to be in proximity.
2Reliability
If location information is frequently requested and reported, then proximity determination reliability is improved, but network signaling overhead increases
Solution Approach 1:
The patent implements partial action by conditionally requesting and reporting location information only when specific conditions are met (UEs within predetermined distance and time window). This selective approach maintains proximity determination reliability by ensuring location data is obtained when needed, while significantly reducing network signaling overhead by avoiding unnecessary location requests and reports.
3Adaptability or versatility
If UEs camp on shared cells with different ECGIs, then network compatibility is improved, but location reporting accuracy deteriorates
Solution Approach 1:
The patent introduces an intermediary approach by using a ProSe function entity that mediates between UEs camping on shared cells with different ECGIs. This intermediary collects and processes location information from multiple UEs, determining proximity based on predetermined distances and time windows, thereby resolving the conflict between network compatibility and location reporting accuracy.
Data Source
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AI summary
The present invention relates to a method and apparatus for a first terminal to perform a proximity service (ProSe) in a wireless communication system. More specifically, the method comprises the steps of: a first terminal transmitting a Prose discovery request to a first network entity; and the first terminal receiving a ProSe discovery response from the first network entity, wherein the ProSe discovery response indicates a refusal of the ProSe if the first terminal and a second terminal area determined not to be in a proximity relationship during a previously configured temporal period.