5G UE Positioning Assistance in RRC Idle and Inactive States
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Solution Overview
Problem
Existing 5G positioning technologies face challenges in efficiently providing positioning assistance information to User Equipment (UE) in RRC idle or inactive states, leading to increased system overhead and positioning delay.
Innovation Solution
A method where positioning assistance information is included in the RRC release message, allowing UE to perform positioning measurements in RRC non-connected states, reducing the need for system message retrieval and minimizing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE in RRC idle or inactive state obtains positioning assistance information through system message or active request, then the positioning measurement can be performed, but the system overhead increases and positioning delay occurs
Solution Approach 1:
The base station performs preliminary action by including positioning assistance information in the RRC release message before the UE enters idle or inactive state. This allows the UE to have the necessary positioning assistance information readily available when needed, eliminating the delay of obtaining it through system messages or active requests later.
Solution Approach 2:
The RRC release message serves as an intermediary carrier to transfer positioning assistance information from the base station to the UE. This intermediary mechanism efficiently delivers the required information during the connection release process, avoiding the need for separate system message transmissions or active UE requests.
2Measurement precision
If the UE in RRC idle or inactive state obtains positioning assistance information through system message or active request, then the positioning measurement can be performed, but the system overhead increases
Solution Approach 1:
The patent merges the positioning assistance information transmission with the existing RRC release message transmission. By combining these functions, the system avoids additional separate transmissions for positioning assistance information, thereby reducing system overhead while ensuring the UE receives necessary positioning data.
Solution Approach 2:
The RRC release message is given multi-functionality by incorporating positioning assistance information along with its standard release functions. This universal approach allows a single message to serve multiple purposes: releasing the RRC connection and providing positioning assistance, thus reducing overall system overhead.
Data Source
AI summary
A positioning method in a 5G cellular network includes a UE receiving a radio resource control (RRC) release message, the RRC release message carrying positioning assistance information. The positioning assistance information is used to perform positioning measurement to obtain a positioning result when the UE is in an RRC non-connected state; and the RRC non-connected state includes an RRC idle state and an RRC inactive state.