Access Point MIH Indication for Handover Reliability
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Solution Overview
Problem
In wireless LAN environments, mobile nodes face challenges in determining whether an access point in a heterogeneous network supports the Media Independent Handover (MIH) protocol, leading to incomplete handover capabilities when either the node or the access point lacks MIH protocol support.
Innovation Solution
An access point is equipped with a wired interface module to receive MIH indication information from neighboring access routers, store this information, and generate frames to transmit it to mobile nodes, ensuring they know whether the target access point supports MIH protocol, facilitating seamless handovers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the access point transmits MIH indication information to the mobile node, then the mobile node can determine MIH protocol support and make informed handover decisions, but the device complexity and communication overhead increase
Solution Approach 1:
The access point is divided into functional modules: a receiving unit that obtains MIH indication information from access routers, a storage unit that maintains this information, and a transmission unit that sends it to mobile nodes. This segmentation allows the access point to provide MIH support information without requiring complete restructuring of the entire system.
Solution Approach 2:
The access point acts as an intermediary between access routers and mobile nodes. It receives MIH capability information from access routers via wired networks and transmits this information to mobile nodes via wireless networks, enabling indirect communication that simplifies the overall system architecture.
2Reliability
If the access point receives and stores MIH indication information from access routers, then the mobile node can determine target network compatibility, but the loss of time for information transmission and processing occurs
Solution Approach 1:
The access point performs preliminary actions by receiving and storing MIH indication information from access routers in advance, before mobile nodes need to perform handovers. This pre-positioning of information eliminates the need for real-time queries during critical handover moments, significantly reducing handover time.
Solution Approach 2:
The access point maintains a buffer of MIH capability information from neighboring access routers, creating an information cushion that is readily available when mobile nodes approach for handover decisions. This beforehand preparation ensures that information is available immediately when needed, preventing time loss during the actual handover process.
Data Source
AI summary
An apparatus and method relates to transmission of media independent (MIH) handover protocol information, the access point includes a wired interface module to receive, through a wired network, indication information indicating whether an access point that manages a neighboring heterogeneous subnet supports a protocol to conduct a media independent handover (MIH), a storage module to store the received indication information, a frame generating module to generate a frame including the stored indication information, and a wireless interface module to transmit the generated frame to a mobile node.