UE Cell Barring for Repeated 5G Positioning Requests
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing positioning requests from user equipment (UE) to prevent unnecessary signaling overhead and reduce positioning uncertainty due to repeated requests, especially in 5G networks with high accuracy requirements.
Innovation Solution
Implementing cell barring mechanisms that restrict UE from sending new positioning requests for a specified time duration based on conditions, using system information blocks (SIBs) and UE motion class to determine positioning uncertainty propagation rates, thereby selecting suitable cells within a threshold signal strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously sends positioning requests to the location server, then the positioning service remains available, but signaling overhead increases and positioning uncertainty increases due to repeated requests
Solution Approach 1:
The patent implements cell barring with a timer mechanism that allows the UE to send positioning requests only after a specified barring period has elapsed. This periodic restriction prevents continuous or repeated positioning requests within a certain time window, thereby reducing signaling overhead while still allowing positioning service to be available when needed (after the barring period expires).
Solution Approach 2:
The patent introduces dynamic parameters including the barring timer value, barring period, and cell barring indicator that can be configured and adjusted. These parameters control the timing and conditions under which positioning requests are allowed, enabling the system to balance service availability with overhead reduction through parameter optimization.
2Measurement precision
If the UE sends multiple positioning requests to improve positioning accuracy, then positioning precision improves, but signaling overhead and positioning uncertainty increase
Solution Approach 1:
The patent performs preliminary actions by configuring the UE with motion class information and barring parameters before positioning requests are made. The UE determines whether to send a positioning request based on pre-established criteria involving motion class, current time, and barring timer status. This preliminary setup prevents unnecessary repeated requests that would increase positioning uncertainty while still enabling accurate positioning when conditions are appropriate.
3Productivity
If cell barring is implemented to reduce signaling overhead, then signaling efficiency improves, but the complexity of the positioning procedure increases
Solution Approach 1:
The patent implements self-service mechanisms where the UE autonomously manages the cell barring logic. The UE monitors its own motion class, checks the current time against the barring period, and determines whether to send positioning requests without requiring network intervention. The UE also manages the barring timer locally, reducing the need for complex network-side control while maintaining signaling efficiency.
Data Source
AI summary
Disclosed are techniques for communication. In an aspect, a user equipment (UE) transmits, to a location server, a first positioning request to obtain a position of the UE based on a first positioning procedure involving at least a serving cell of the UE, receives, from the location server, an error message indicating that the position of the UE is not available, and transmit, to the location server, after expiration of at least a threshold period of time, a further positioning request to obtain the position of the UE based on a subsequent positioning procedure involving at least the serving cell of the UE, wherein the threshold period of time is based on occurrence of one or more conditions.