Mobile Station Context Management for Wireless Handover
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Solution Overview
Problem
Current wireless access network handover processes fail to ensure correct addressing of logic entities during mobile station (MS) handovers due to lack of identification information, leading to potential disruptions in data path establishment and service transmission.
Innovation Solution
Incorporating anchor function entity identification information into the mobile station context, allowing the service network to address corresponding network function entities and establish data paths and services on a target network during handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anchor function entity identification information is not included in mobile station context, then the context structure remains simple, but correct addressing of logic entities during handover cannot be ensured
Solution Approach 1:
The mobile station context is segmented into multiple components, with anchor function entity identification information being a distinct segment. This segmentation allows the context to be organized in a structured manner, separating identification information from other context data, thereby enabling reliable addressing of logic entities without overwhelming complexity.
Solution Approach 2:
The anchor function entity identification information is prepared and stored in the mobile station context in advance, before the handover process begins. This preliminary action ensures that when handover occurs, the target network can immediately use this pre-prepared identification information to correctly address logic entities, eliminating the need for complex real-time discovery procedures.
2Productivity
If anchor function entity identification information is carried in mobile station context, then seamless data path establishment is achieved, but information management complexity increases
Solution Approach 1:
The anchor function entity identification information serves multiple functions: it identifies the target logic entities, enables correct addressing, and facilitates data path establishment. This multi-functionality allows a single piece of information to achieve multiple objectives, improving productivity without proportionally increasing management complexity.
Solution Approach 2:
The anchor function entity identification information acts as an intermediary between the mobile station context and the target logic entities. It bridges the gap between the handover process and the target network resources, enabling efficient data path establishment while simplifying the interaction between different network components.
3Adaptability or versatility
If context conveying hierarchy is enhanced for different ASN profiles, then handover flexibility improves, but processing complexity increases
Solution Approach 1:
The context conveying mechanism is customized for different ASN profiles with specific local characteristics. Each ASN profile can have its own context conveying hierarchy and procedures tailored to its specific requirements, while still using the same anchor function entity identification information framework. This local quality approach enhances adaptability without requiring a complete redesign for each profile.
Data Source
AI summary
A method for managing the context of the mobile station (MS) is applied in an MS handover process of a wireless access network. The function entity identification information of acting on the MS is carried in the context of the MS, and the MS addresses based on the function entity identification information and handovers to the target base station. By adding the identifications of various logic entities acting on the MS to the context information of the MS, the correct addressing of these logic entities is ensured during the handover. The different local policies of the source and destination ends are considered during conveying the context of the MS, in which the destination end may update certain context of the MS according to its own local policy during conveying; and the hierarchy of the context conveying of the MS during the handover is also considered.