MIH Function for Mobility in Heterogeneous Networks
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Solution Overview
Problem
Current communication networks with heterogeneous subnetworks, such as those using different access technologies, face limitations in mobility and quality of service due to technology-specific access points and resource constraints, leading to suboptimal use of network resources and limited user mobility.
Innovation Solution
A method that allows a terminal to receive information about accessible subnetworks from a proxy terminal, enabling selection of the best subnetwork for communication based on resource availability and quality of service, thereby optimizing network resource utilization and user mobility across different technologies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a terminal accesses subnetworks directly through technology-specific access points, then the access architecture is simple and technology-specific resources are efficiently utilized, but user mobility is limited and quality of service cannot be optimized across different access technologies
Solution Approach 1:
The patent introduces an MIH function as an intermediary layer between the terminal and multiple access technologies. This mediator enables the terminal to access subnetworks operated by different access technologies without direct technology-specific bindings, thereby improving user mobility while maintaining a unified access architecture that doesn't overly complicate the system.
Solution Approach 2:
The MIH function serves multiple purposes: it manages mobility across different access technologies, selects appropriate subnetworks based on quality of service requirements, and coordinates resource allocation. This multi-functional approach enables a single component to address various needs (mobility, QoS, resource management) without requiring separate specialized systems for each function.
2Adaptability or versatility
If the MIH function is positioned at layer 2.5 to manage mobility across access technologies, then user mobility and quality of service are improved, but the complexity of protocol stack integration increases
Solution Approach 1:
The patent positions the MIH function at layer 2.5, which is an intermediate dimension between layer 2 (data link layer) and layer 3 (network layer). This dimensional placement allows the MIH function to interact with both access technology-specific protocols at layer 2 and IP-based protocols at layer 3, enabling QoS management and mobility control without deeply integrating into the complexity of either layer's protocol stack.
3Productivity
If access points provide technology-specific access to terminals, then resource allocation within each subnetwork is optimized, but the overall network resource utilization is suboptimal
Solution Approach 1:
The MIH function implements feedback mechanisms that monitor the state of multiple subnetworks operated by different access technologies. Based on this feedback regarding resource availability and quality of service conditions, the MIH function dynamically selects the most appropriate subnetwork for terminal access, thereby optimizing overall network resource utilization while maintaining access flexibility across different technologies.
Data Source
AI summary
A communication of a first terminal (A) is managed in a communication network (10) comprising subnetworks (M, N). The first terminal can communicate with at least one second terminal (B) and at least one subnetwork (M) of the network is accessible via this second terminal. At the level of the first terminal, information relating to resources of the subnetwork which is accessible via the second terminal is received from the second terminal. On the basis of this information, a subnetwork is selected for the communication of the first terminal from among a set of subnetworks of the network comprising at least this subnetwork accessible via the second terminal.