Mobility Gateway for Seamless WLAN WWAN Session Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current solutions for seamless connectivity between Wi-Fi and cellular networks, such as IWLAN, face limitations in end-user device implementation and user experience, leading to duplicative authentication and mobility management processes, which hinder seamless handover and efficient data traffic management between Wi-Fi and macro-cellular networks.
Innovation Solution
A mobility gateway device (MGW) is introduced to interact with both Wi-Fi and cellular networks, allowing seamless session management by assigning and managing IP addresses, tunneling traffic, and handling handovers between Wi-Fi and cellular networks without requiring IPSec tunnels on user devices, leveraging native security mechanisms and protocols like IEEE 802.1x for Wi-Fi and UMTS AKA for cellular networks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IWLAN standardized architecture and protocols are implemented, then seamless connectivity between WLAN and WWAN is achieved, but device implementation complexity and user experience limitations increase
Solution Approach 1:
A mobility gateway device is introduced as an intermediary between the WLAN controller and WWAN network. The gateway handles session management, IP address assignment, and mobility management functions, eliminating the need for complex IPSec tunnel implementation on user devices while maintaining seamless connectivity between WLAN and WWAN networks
2Reliability
If duplicative authentication and mobility management processes are executed in disjointed WLAN and macro-cellular networks, then network security is maintained, but user experience and handover seamlessness deteriorate
Solution Approach 1:
The mobility gateway combines authentication and mobility management functions for both WLAN and WWAN networks into a single unified process. When a user equipment moves between networks, the gateway maintains continuous session state and performs seamless handover without requiring duplicative authentication, thereby maintaining security while improving user experience
3Productivity
If Wi-Fi traffic is offloaded from macro-cellular network, then data traffic costs are reduced, but session management and mobility tracking complexity increases
Solution Approach 1:
The mobility gateway serves as a mediator that simplifies session management during Wi-Fi offloading. It maintains IP address mapping tables and session state information, allowing the network to track user equipment across different access networks without requiring complex distributed session management, thereby enabling cost-effective traffic offloading while maintaining manageable session complexity
Data Source
AI summary
According to one aspect, a mobility gateway device (MGW) receives a request from a wireless local area network (WLAN) controller of a WLAN for accessing the Internet or a packet core network, where the request is originated from a user equipment communicatively coupled to the WLAN. In response to the request, the MGW is configured to determine whether there is an active session associated with the UE over a wireless wide area network (WWAN). If so, the MGW assigns an IP address to the UE that was assigned to the UE during the active session of the WWAN. The assigned IP address is used by the UE to access the Internet or the packet core network over the WLAN.