Fixed Wireless Access Cell Reselection After Radio Link Failure
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Solution Overview
Problem
Fixed Wireless Access (FWA) devices often get stuck on suboptimal cells due to optimizations that prevent frequent handovers, leading to degraded network experiences until a fresh cell selection is performed, which impacts users accessing internet and streaming services.
Innovation Solution
A system and method that determine Radio Link Failure (RLF) conditions and use Reference Signal Received Power (RSRP) to trigger a measurement event, facilitating Radio Resource Control (RRC) re-establishment to connect FWA devices to the best available cell by releasing RRC connections with suboptimal cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If optimizations are used to prevent frequent handovers between cells, then network stability is improved, but the device gets stuck on suboptimal cells leading to degraded user experience
Solution Approach 1:
The system implements a feedback mechanism where the FWA device periodically reports its camped cell status and RSRP measurements to the RAN. The RAN uses this feedback information to determine whether to trigger RRC re-establishment, allowing the system to adaptively balance handover prevention with quality optimization based on real-time network conditions and device reporting.
Solution Approach 2:
The system changes the parameter of RRC connection state management by introducing conditional re-establishment logic. Instead of maintaining a fixed handover prevention policy, the system dynamically adjusts the RRC connection state based on measured RSRP values, network conditions, and device reports, enabling flexible optimization of both stability and quality.
2Duration of action of stationary object
If the device stays camped on a far cell when the best cell goes down, then connection continuity is maintained, but the device cannot quickly resume optimal service when the best cell comes back up
Solution Approach 1:
The system performs preliminary actions by having the FWA device continuously monitor and report RSRP measurements of available cells even when camped on a far cell. This preliminary data collection enables the RAN to make informed decisions about when to trigger re-establishment, allowing quick service restoration without requiring the device to actively search for better cells during the transition.
3Reliability
If the device performs fresh cell selection post reboot or in RRC idle state, then optimal cell selection is achieved, but this process is unlikely to occur with multiple users and embedded applications
Solution Approach 1:
The system enables self-service by having the FWA device autonomously monitor its own connection quality through RSRP measurements and automatically trigger RRC re-establishment when conditions warrant it. The device serves itself by detecting suboptimal conditions and initiating the recovery process without requiring manual intervention or waiting for idle states, making optimal cell selection automatic and continuous.
Data Source
AI summary
The present disclosure provides a system (112) and a method for providing fixed wireless access to users using reselection. The system (112) determines a Radio Link Failure (RLF) condition associated with a Fixed Wireless Access (FWA) device (102). The RLF condition indicates a loss of connection of the FWA device (102) with a primary base station (104) among one or more base stations in a Radio Access Network (RAN) (108). The system (112) receives a measurement report from the FWA device (102) comprising a Reference Signal Received Power (RSRP) associated with the one or more base stations. The system (112) transmits a measurement event to the FWA device (102). The system (112) facilitates the FWA device (102) to connect to an optimum base station in the RAN (108) among the one or more base stations when the RSRP of the optimum base station is at a threshold.