Seamless Wi-Fi Roaming via Mobility Management Server
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Solution Overview
Problem
Users experience service interruptions when moving between different Wi-Fi networks due to disassociation and re-authentication, which disrupts ongoing services like video streaming and voice calls.
Innovation Solution
A seamless Wi-Fi network system that maintains connectivity by mapping a source access point identifier to a corresponding Wi-Fi network with specific policies, allowing continuous communication and updating records for billing and accounting purposes, without requiring re-authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a client device moves from one Wi-Fi network to another, then the device can access different networks, but service interruption occurs due to disassociation and re-authentication
Solution Approach 1:
The patent introduces a mobility management server as an intermediary that coordinates between different Wi-Fi networks. This server maintains session information and enables seamless handover by acting as a mediator that preserves connectivity state across network boundaries, eliminating the need for complete re-authentication and thus preventing service interruption during mobility events
Solution Approach 2:
The system performs preliminary actions by pre-establishing session contexts and authentication states before the actual network handover occurs. The mobility management server anticipates mobility events and prepares necessary routing information and session parameters in advance, enabling the client device to maintain continuous service during the transition between access points
2Reliability
If re-authentication is required when moving between networks, then network security is maintained, but service interruption and user experience degradation occur
Solution Approach 1:
The mobility management server performs preliminary authentication and session establishment actions before the client device actually needs to handover networks. By pre-validating user credentials and pre-establishing session contexts, the system eliminates the need for time-consuming re-authentication during mobility events, thus reducing authentication time while maintaining security
Solution Approach 2:
The system implements feedback mechanisms where the mobility management server continuously monitors client device location and session state. This feedback loop enables the server to proactively manage handovers and maintain authentication contexts, allowing the system to respond to mobility events without requiring disruptive re-authentication cycles
3Adaptability or versatility
If separate authentication is performed for each Wi-Fi network, then network policies are enforced, but user experience is degraded due to repeated authentication
Solution Approach 1:
The mobility management server provides universal authentication and session management functionality that works across multiple Wi-Fi networks. Instead of requiring separate authentication for each network, the server maintains a unified authentication context that serves all networks in the seamless Wi-Fi network, thus improving ease of operation while still enforcing network-specific policies through the universal session framework
Data Source
AI summary
Embodiments enable seamless Wi-Fi roaming by providing a user with a single username that is associated with a set of resources in the seamless network that includes different Wi-Fi networks (e.g., Wi-Fi networks with different domain names). As a user travels from a first access point in a first Wi-Fi network to a second access point in a second Wi-Fi network within the seamless network, network elements in the seamless network may recognize the user's single username as an already established session (e.g., with the first access point) and direct traffic accordingly to the second access point. Embodiments also satisfy business requirements by updating accounting data accordingly by indicating that the user accessed the seamless network from the first Wi-Fi network. Embodiments allow a user roaming on the seamless network to experience the policies and network requirements associated with the Wi-Fi domain of the second access point.