Mobility Manager for Seamless IP Handovers
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Solution Overview
Problem
Current telecommunications systems face challenges in maintaining continuity and quality of service for mobile internet protocol communications across various access networks, particularly in unregulated networks like WLANs, where congestion can significantly impact service quality and throughput, and existing solutions do not effectively manage handovers or quality of service reselection.
Innovation Solution
A mobility manager system that receives link quality and congestion messages from access networks, executes Network and Quality of Service Re-selection algorithms to dynamically direct mobile nodes to optimal access networks based on their subscribed service levels, ensuring seamless handovers and maintaining minimum quality of service, even in congested conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If mobile nodes use unregulated access networks like WLAN, then data communication speed is improved, but network congestion increases and service quality deteriorates
Solution Approach 1:
The mobility manager receives link quality evaluation messages from mobile nodes and access network evaluation messages from access gateways, continuously monitoring network conditions. Based on this feedback, the mobility manager dynamically adjusts communications session levels and directs handovers to maintain service quality while utilizing high-speed networks.
Solution Approach 2:
The system dynamically adapts communications session levels based on current network conditions. The mobility manager can change session levels before or after handovers occur, allowing the system to flexibly respond to changing network congestion levels and maintain optimal service quality.
2Speed
If a single mobile user occupies greater proportion of bandwidth in WLAN, then data rate is improved, but other mobile users experience degraded service quality
Solution Approach 1:
The mobility manager applies different quality treatment to different mobile nodes based on their subscribed service levels. High-service-level nodes receive prioritized bandwidth allocation and preferential handover treatment, while lower-service-level nodes receive standard treatment, thereby ensuring fair resource distribution.
Solution Approach 2:
The system changes the communications session level parameter dynamically based on network conditions and user subscriptions. This allows adjustment of bandwidth allocation parameters to match service level agreements, preventing single users from monopolizing resources while maintaining high data rates for entitled users.
3Reliability
If the system manages handovers and quality of service reselection, then service continuity is improved, but system complexity increases
Solution Approach 1:
The mobility manager acts as an intermediary between mobile nodes, access networks, and application servers. It centralizes the complex tasks of handover management and quality of service reselection, shielding the complexity from individual components while ensuring continuous service through coordinated control.
Solution Approach 2:
The mobility manager performs multiple functions including receiving link quality evaluation messages, processing access network evaluation messages, determining handover decisions, and coordinating with application servers. This multi-functional approach consolidates complexity into a single managing entity rather than distributing it across multiple components.
Data Source
AI summary
A telecommunications system provides mobile internet protocol related communications services to mobile nodes via a plurality of access networks that each include an access gateway, a mobility manager operable to receive link quality messages from the mobile nodes providing an indication of a currently available link quality from an access network with which the mobile node is currently affiliated. The mobility manager is also operable to receive application server messages from the application server for managing the communications service with respect to the communications session level. The mobility manager directs a change of affiliation of a first mobile node between one of a first of the access networks and a second of the access networks to the other of the first and second access networks, or a change of communications session level of the first mobile node.