Positioning Support Information for Wireless Location Service
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Solution Overview
Problem
In the LTE wireless communication system, unclear specifications for location services lead to mobility management and load issues, as well as unnecessary resource wastage due to unclear support for positioning functions, causing UE to fail in initiating location services correctly and resulting in inefficient handovers between networks.
Innovation Solution
A method where a message including positioning support information is transmitted via a first RAT to a mobile device, allowing it to determine whether positioning is supported, enabling the UE to initiate location services in the appropriate network, either LTE or UMTS, thereby controlling the handover process and optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE initiates location service in LTE network, then the positioning function can be utilized, but the service fails when LTE does not support positioning
Solution Approach 1:
The network performs preliminary action by transmitting positioning support information to the UE before the UE attempts to initiate location service. This allows the UE to know in advance whether LTE positioning is supported, preventing failed service initiation and eliminating the need for complex post-failure network selection logic.
Solution Approach 2:
Positioning support information acts as an intermediary that bridges the gap between network capabilities and UE decisions. This information mediator enables the UE to make informed network selection without complex internal logic, resolving the contradiction between reliability and device complexity.
2Adaptability or versatility
If the UE performs CS fallback to UMTS for location service, then positioning can be initiated in UMTS, but unnecessary handover and resource wastage occur
Solution Approach 1:
The network transmits positioning support information in advance, allowing the UE to determine beforehand whether LTE or UMTS should be used for location service. This preliminary information prevents unnecessary CS fallback handovers and associated resource wastage while maintaining adaptability to different network capabilities.
3Ease of operation
If the network does not provide positioning support information, then the system remains simple, but the UE cannot determine the appropriate network for location service
Solution Approach 1:
The patent extracts positioning support information from the network and transmits it to the UE. This extraction provides the necessary information for easy network selection without significantly increasing system complexity, as only specific capability information needs to be transmitted rather than complete system state.
4Adaptability or versatility
If the UE autonomously selects network for location service, then service initiation is flexible, but mobility management and load problems occur
Solution Approach 1:
Positioning support information serves as an intermediary that guides UE network selection decisions. This information mediator provides flexibility for UE to choose appropriate networks while preventing mobility management issues by ensuring UEs select networks that actually support positioning, reducing unnecessary handovers and load imbalances.
Data Source
AI summary
A method of handling location service for a network in a wireless communication system is disclosed. The method comprises transmitting a message including positioning support information of the network via a first RAT to a mobile device in the wireless communication system, for informing the mobile device whether positioning is supported in the first RAT, wherein the positioning support information indicates whether positioning is supported in the first RAT.