Autonomous Handover Signaling for Shared Communication Medium
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Solution Overview
Problem
In wireless communication systems, especially those using shared communication media like unlicensed or lightly licensed frequency bands, frequent periods of inaccessibility and cross-link interference lead to mobility performance issues due to the need for access-point-directed handovers, which can be slow and inefficient.
Innovation Solution
The implementation of autonomous handover capabilities in access terminals, configured by access points with parameters defining triggering events such as traffic class, travel speed, and signal strength, allowing terminals to independently perform handovers to target access points without requiring measurement reports or notifications to the source access point.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If access-point-directed handovers are used on shared communication media, then handover control and coordination are improved, but handover speed and mobility performance deteriorate due to frequent inaccessibility and interference
Solution Approach 1:
The access terminal is empowered to autonomously perform handover operations without requiring continuous access-point-directed control. The terminal independently monitors triggering events, selects target access points, and executes handovers based on pre-configured parameters and real-time measurements, enabling self-service handover that overcomes medium inaccessibility issues
Solution Approach 2:
The source access point performs preliminary configuration of the access terminal with handover parameters, triggering event thresholds, and target access point information before handover is needed. This preliminary setup enables the terminal to execute autonomous handovers without requiring real-time coordination during the actual handover moment
2Adaptability or versatility
If access-point-directed handovers are used, then network coordination is improved, but system efficiency deteriorates due to slow and inefficient handover processes
Solution Approach 1:
The access terminal independently monitors triggering events such as signal strength thresholds and travel speed conditions, then autonomously selects target access points and executes handovers without requiring network coordination during execution, dramatically improving handover efficiency while maintaining adaptability through pre-configured parameters
3Speed
If autonomous handover is implemented, then handover speed and mobility performance are improved, but device complexity increases due to terminal autonomy requirements
Solution Approach 1:
The source access point performs preliminary configuration of the access terminal with handover parameters, triggering event thresholds, and target access point information before handover is needed. This preliminary setup reduces terminal complexity by providing pre-processed handover data and decision criteria
Solution Approach 2:
The system uses configurable parameters such as signal strength thresholds, travel speed thresholds, and triggering event types that can be adjusted by the network to optimize handover behavior. These parameter changes allow the terminal to perform autonomous handovers with varying levels of complexity based on deployment requirements
Data Source
AI summary
Techniques for autonomous handover signaling on a shared communication medium are disclosed. An access terminal may receive, from an access point, one or more configuration messages configuring the access terminal for autonomous handover and including a parameter defining one or more autonomous handover triggering events. The access point may perform one or more mobility measurements on a communication medium and monitor for the one or more autonomous handover triggering events based on the one or more mobility measurements. The access terminal may perform an autonomous handover from a source access point to a target access point based on the monitoring.