Proxy Mobility Entity for Seamless Session Transfer
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Solution Overview
Problem
Current communication systems face challenges in maintaining continuous mobility and seamless session transfer when a communication device switches between different access technologies, such as from WLAN to cellular networks, due to lack of IP-level mobility support, leading to session interruptions and overhead from extra IP headers.
Innovation Solution
The implementation of a proxy mobility entity that allows a communication device to request and maintain the same address across different access systems, using proxy mobility protocols like PMIP, which hides IP mobility aspects from the device and enables smooth handovers without re-initiating sessions or implementing mobility protocols within the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a communication device switches between different access technologies without IP-level mobility support, then the device can access different networks, but the session must be closed and re-initiated causing interruptions
Solution Approach 1:
The patent introduces a Proxy Mobile IPv4 entity as an intermediary between the communication device and the network. This intermediary maintains the IPv4 address binding and manages mobility signaling, allowing the device to switch access technologies without closing the session. The proxy entity mediates between the home agent and the access networks, enabling seamless handovers while maintaining session continuity.
2Reliability
If mobility protocols are implemented within the communication device, then the device can maintain mobility across access systems, but the device complexity increases
Solution Approach 1:
The patent offloads mobility protocol implementation from the communication device to a network-based Proxy Mobile IPv4 entity. The device only needs to maintain a simple IPv4 address without implementing complex mobility protocols. The proxy entity handles all mobility signaling, binding management, and handover coordination, significantly reducing device complexity while maintaining full mobility support.
Solution Approach 2:
The network infrastructure provides mobility services autonomously through the Proxy Mobile IPv4 entity and home agent, without requiring the communication device to actively manage mobility. The system self-manages address binding, tunnel establishment, and handover coordination, freeing the device from complexity while ensuring reliable mobility support.
3Reliability
If tunneling is used for mobility support, then session continuity is maintained, but the overhead from extra IP headers increases
Solution Approach 1:
The patent introduces a proxy entity that consolidates tunneling management, reducing the number of nested IP headers compared to traditional Mobile IP implementations. The proxy acts as an intermediary that simplifies the tunneling architecture, maintaining session continuity while minimizing protocol overhead by optimizing the encapsulation structure between the home agent and access networks.
Data Source
AI summary
The disclosure relates to accessing a communication system. In accordance with the disclosed method a communication device communicating in a first access system based on an address is transferred to a second access system. The communication device sends an indication that the same address is to be used in the second access system, where after, if proxy mobility is available for the address, the same address is used for communications in the second access system.