MRSRAT List for Seamless Radio Access Network Handoffs
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Solution Overview
Problem
Handoffs between Radio Access Technologies (RATs) in mobile devices often result in temporary disconnections and delayed connections due to the lack of agreement between RATs, impacting user experience, especially when devices move between coverage areas.
Innovation Solution
A Most Recently Scanned RAT (MRSRAT) list is created and stored on mobile devices to quickly select a new Radio Access Network (RAN) without scanning for available networks, allowing for seamless handoffs and continued sessions by prioritizing networks based on signal strength and quality assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mobile devices perform scanning for available RATs during handoff, then they can discover available networks, but connection delays increase and user experience deteriorates
Solution Approach 1:
The system performs scanning for available RATs in advance and stores the scanned information in a cache before handoff is needed. When handoff occurs, the mobile device can directly use the pre-scanned RAT information from the cache instead of performing new scans, thereby reducing handoff delay while maintaining connection reliability.
2Reliability
If mobile devices perform scanning for available RATs during handoff, then they can discover available networks, but temporary disconnections occur and user experience deteriorates
Solution Approach 1:
The system performs scanning for available RATs in advance and stores the scanned information in a cache before handoff is needed. When handoff occurs, the mobile device can directly use the pre-scanned RAT information from the cache instead of performing new scans, thereby reducing handoff delay while maintaining connection reliability.
Data Source
AI summary
A method may include monitoring available radio access networks for information on one or more of types of radio access technologies, measurements of signal quality, measurements of signal strengths, or carrier identifiers of the available radio access networks; calculating network priorities for the available radio access networks based on the monitored information; detecting a border condition, the border condition based on a decrease in the measurements of signal quality or the measurements of signal strength; selecting, when a border condition is detected, a new radio access network from the available radio access networks based on the calculated network priorities of the available radio access networks; and connecting to a communication channel using the selected available radio access network.