ProSe Session Mobility Handling for Seamless Handover Continuity
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing proximity services (ProSe) sessions during mobility events, leading to disruptions and inefficient re-establishment of sessions due to lack of timely notification and appropriate response to mobility events such as inter-system changes or handovers.
Innovation Solution
A wireless transmit/receive unit (WTRU) is configured to detect mobility events and transmit notifications to cellular network nodes, including an evolved Node B, proximity server, or mobility management entity, to determine and execute actions such as continuing or suspending ProSe sessions via WLAN or the Internet, based on the type of mobility event.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If proximity services sessions are maintained during mobility events, then service continuity is improved, but network complexity and management overhead increase
Solution Approach 1:
The patent applies preliminary action by having the WTRU detect mobility events (such as handovers or inter-system changes) before they complete, and proactively transmit notifications to network nodes. This allows the network to prepare for session continuity in advance, managing the complexity through early detection and preparation rather than reactive responses after disruption occurs.
2Productivity
If mobility events are detected and notifications transmitted, then session management efficiency is improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent implements feedback mechanisms where WTRUs monitor their own mobility state and send notifications to network nodes, which then provide feedback instructions on session handling. This closed-loop feedback system improves efficiency by ensuring sessions are managed according to actual mobility conditions, while the standardized feedback protocol minimizes processing time through predefined handling procedures.
3Productivity
If ProSe sessions are suspended during mobility events, then network resource optimization is improved, but service availability deteriorates
Solution Approach 1:
The patent applies dynamics by enabling flexible session management where the network can dynamically adjust session handling based on mobility event types and network conditions. Sessions can be suspended, continued, or modified according to real-time requirements, allowing optimization of network resources while maintaining service availability through adaptive rather than static session management policies.
Data Source
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AI summary
Systems, methods, and instrumentalities are disclosed to describe reporting and/or reacting to a mobility event. A wireless transmit/receive unit (WTRU) may comprise a processor configured, at least in part, to establish a proximity service (ProSe) session with a second WTRU, detect the occurrence of a mobility event in a cellular network while the ProSe session is ongoing, determine a type of action to be performed with respect to the ProSe session based on one or more of the type of mobility event and type of ProSe session, and transmit a notification to a node in the cellular network, wherein the notification includes an indication of an action to be performed on the ProSe session. The node may be one of an evolved Node B (eNB), proximity server, or mobility management entity (MME). The node may be the second WTRU.