Application Server Call Anchoring Based on UE Capabilities
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Solution Overview
Problem
Wireless communication systems face inefficiencies when handling calls between packet switched and circuit switched networks, particularly due to delays and resource wastage during handovers, and applications servers struggle to optimize performance for user equipment with varying capabilities.
Innovation Solution
A method and apparatus that allow an application server to determine whether to anchor a call in a packet switched or circuit switched network based on the user equipment's capabilities, using messages from a serving node to assess network capabilities and adapt performance accordingly, thereby avoiding unnecessary delays and resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If calls are anchored in the packet switched network, then resource usage in the circuit switched network is optimized, but anchoring delays occur during handover to circuit switched network
Solution Approach 1:
The application server performs preliminary actions by determining user equipment capabilities (single radio interface vs. dual radio interface) before call establishment, and pre-decides the anchoring location based on this capability assessment. This preliminary determination prevents the need for dynamic anchoring changes during handover, thereby eliminating anchoring delays while optimizing resource usage.
2Loss of time
If calls are anchored in the circuit switched network, then handover delays are avoided, but resources of the circuit switched network are wastefully consumed
Solution Approach 1:
The system changes the parameter of call anchoring location based on user equipment capability parameters. For single radio interface UEs, calls are anchored in the packet switched network to optimize resources, while for dual radio interface UEs, calls are anchored in the circuit switched network to avoid handover delays. This parameter-based differentiation resolves the contradiction by adapting the anchoring strategy to specific UE capabilities.
3Adaptability or versatility
If application server adapts to all user equipment capabilities, then service compatibility is improved, but system complexity increases
Solution Approach 1:
The application server applies local quality by treating different user equipment types differently based on their capabilities. Instead of implementing a complex universal adaptation mechanism for all possible UE capabilities, the server focuses on the key differentiating factor (single vs. dual radio interface) and applies specific anchoring strategies locally appropriate to each UE type, thereby maintaining service compatibility without excessive system complexity.
Data Source
AI summary
The present invention provides a method of establishing a call to or from a user equipment in a wireless communication system comprising a first wireless network and a second wireless network, the second wireless network having an association with the first wireless network, the wireless communication system having a serving node and an application server capable of communication with said serving node, and the method comprising: receiving a message from said serving node at the application server, said message having information regarding network capabilities of said user equipment; and determining at the application server whether to anchor said call in the first wireless network or the second wireless network dependent on said information regarding network capabilities of said user equipment.