Radio Connection Assignment Management for Handoff Reliability
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Solution Overview
Problem
In cellular wireless communication networks, mobile stations may experience dropped calls when transitioning between coverage areas due to incomplete geographic coverage, leading to premature release of radio connections if communication is not established within a threshold time.
Innovation Solution
The mobile station provides an advanced-handoff indication to the network, allowing it to maintain the radio connection assignment for a longer period, enabling the mobile station to establish communication once within the coverage area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network releases the radio connection after a threshold time without communication from the mobile station, then network resources are freed for other uses, but the handoff may be prematurely terminated before the mobile station enters the coverage area
Solution Approach 1:
The network performs preliminary resource allocation by assigning a radio connection to the mobile station before the handoff is fully complete. The connection is maintained in a reserved state beyond the normal threshold time, allowing the mobile station to enter the coverage area and establish communication without premature release of resources.
2Reliability
If the network maintains the radio connection assignment for a longer period after handoff request, then the mobile station has more time to enter the coverage area and establish communication, but network resources are occupied longer and unavailable for other uses
Solution Approach 1:
The radio connection assignment duration is made dynamic rather than fixed. The network extends the connection maintenance period adaptively based on the specific handoff scenario, allowing longer duration when needed for coverage area entry while automatically returning to normal threshold times when not needed, thus optimizing the balance between reliability and resource utilization.
Data Source
AI summary
A method, apparatus, and system for helping to manage advanced handoff to a coverage area based on correlation with a geographic region. A mobile station determines that it is in or approaching a defined geographic region, and the mobile station determines from correlation data that the geographic region is correlated with a particular cellular coverage area. The mobile station therefore requests handoff to the cellular coverage area and provides an advanced-handoff indication to cause the serving radio access network to maintain assignment of a radio connection in the coverage area longer than the network would normally, to help allow time for the mobile station to arrive at the coverage area and begin communicating on the radio connection with the network.