Dead Peer Detection for Mobile Terminals in Multi-Wireless Systems
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Solution Overview
Problem
In mobile communications systems integrating multiple wireless systems, existing dead peer detection methods struggle to accurately monitor and manage the connection status of mobile terminals, particularly in systems without paging functions, leading to increased power consumption and session cutoffs, especially when transitioning to idle or out-of-service modes.
Innovation Solution
A method for dead peer detection in mobile communications systems that involves a first connection device managing the connection status with access points in wireless systems having a paging function, and a second connection device acquiring this status to adjust its dead peer detection control processes, enabling the implementation of paging in systems without the paging function, thus reducing power consumption and eliminating wasteful session management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a mobile terminal uses multiple wireless communication systems simultaneously, then communication versatility is improved, but power consumption increases due to multiple wireless receivers being mounted
Solution Approach 1:
The system performs preliminary actions by establishing paging mechanisms in advance for WiFi systems. When data transmission is suspended or radio signals become weak, the base station can proactively page the mobile terminal to wake it from idle mode, preventing complete connection termination while reducing power consumption during idle periods.
Solution Approach 2:
The invention implements periodic dead peer detection packets exchanged between the base station and mobile terminal to monitor connection status. This periodic action allows the system to detect idle or out-of-service states and trigger appropriate paging or connection maintenance actions, balancing power savings with connection reliability.
2Use of energy by moving object
If the mobile terminal enters idle mode to reduce power consumption, then power efficiency is improved, but connection reliability deteriorates due to potential session cutoffs
Solution Approach 1:
The system implements feedback mechanisms through dead peer detection packets that continuously monitor connection status. When the mobile terminal enters idle mode, the base station receives feedback through these detection packets and can send paging messages to maintain or restore connections, ensuring service continuity while allowing power-saving idle states.
Solution Approach 2:
The invention provides beforehand cushioning by establishing paging capabilities in WiFi systems before connection loss occurs. This prepares the system to handle idle mode transitions gracefully, cushioning against potential session cutoffs by enabling quick reconnection through paging when needed.
3Measurement precision
If the access gateway device periodically transmits dead peer detection packets, then connection status monitoring is improved, but system complexity increases
Solution Approach 1:
The invention makes the dead peer detection mechanism universal across multiple wireless systems (cellular and WiFi). The same detection and paging principles apply to both system types, simplifying the overall architecture by using a unified approach rather than separate mechanisms for each wireless system.
Solution Approach 2:
The base station acts as an intermediary between the access gateway device and the mobile terminal. It receives dead peer detection packets from the gateway and handles paging operations toward the terminal, simplifying the gateway's function while maintaining precise connection monitoring through the intermediary's coordination.
4Reliability
If the mobile terminal reconnects to the access network after idle mode, then connection reliability is improved, but loss of time occurs due to connection re-establishment
Solution Approach 1:
The system performs preliminary actions by maintaining paging capabilities active before complete disconnection occurs. When the terminal enters idle mode, the base station can immediately page it to restore the connection, avoiding the time-consuming process of full reconnection and keeping service availability high.
Data Source
AI summary
With a system having no paging function, dead peer detection control and cutoff of a session are implemented as is the case with a system having a paging function. There is provided a method for dead peer detection of a mobile terminal, to be executed in a mobile communications system including a mobile terminal connected to plural wireless systems, a first connection device terminating a first wireless system with access points managing a connection status between the mobile terminal and a wireless link, and a second connection device terminating a second wireless system with access points not managing a connection status between the mobile terminal and a wireless link, said method comprising the steps of the second connection device acquiring the connection status of the mobile terminal in the first wireless system from the first connection device, and the second connection device changing a dead peer detection control process on the basis of the connection status of the mobile terminal, as acquired.