Mobility Application Server Session Handover
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Solution Overview
Problem
Current fixed-mobile convergence (FMC) systems face challenges in seamlessly handover communication sessions between cellular and fixed packet networks, particularly when a user moves from a fixed to a mobile domain, leading to potential disruptions and inability to return to an active state from an on-hold status.
Innovation Solution
The implementation of a mobility application server (MAS) that facilitates handovers by managing session identifiers, updating location services, and processing signaling protocols to maintain continuous communication across different networks, including cellular, fixed packet, and PSTN networks, ensuring that on-hold sessions can be efficiently transferred and resumed without user intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user moves from fixed packet network to cellular network, then mobility and coverage are improved, but session continuity and communication reliability deteriorate due to handover disruptions
Solution Approach 1:
The system performs preliminary actions by establishing a predictive handover mechanism that proactively identifies suitable target access points before the user actually moves out of range. The network infrastructure pre-evaluates potential handover targets based on predicted user movement patterns and network conditions, preparing handover parameters and resources in advance. This allows the handover to execute smoothly when needed, maintaining session continuity while enabling mobility.
Solution Approach 2:
The patent introduces an intermediary component (handover management module) that acts as a mediator between the fixed packet network and cellular network. This intermediary coordinates the handover process, manages session state transitions, and ensures seamless connectivity by bridging the two networks. It handles the complex signaling and state management required for reliable handover, isolating the user from disruptions while enabling mobility between networks.
2Reliability
If on-hold session handover is implemented, then user experience and service reliability are improved, but system complexity and signaling overhead increase
Solution Approach 1:
The handover management module implements a universal solution that handles multiple session states (active, on-hold, transferred) through a single integrated mechanism. Rather than creating separate complex handling procedures for each session state, the system uses a multi-functional handover framework that adapts to different session conditions. This reduces overall system complexity by providing a unified approach to session continuity across various states while maintaining high service reliability.
Solution Approach 2:
The system manages complexity by dynamically changing session parameters based on handover state. When a session is on-hold during handover, specific parameters (such as media flow direction, session state flags, and signaling priorities) are adjusted to simplify the handover process. These parameter changes allow the system to handle on-hold sessions efficiently without requiring complex special-case logic, thereby improving service reliability while controlling system complexity.
3Ease of operation
If seamless handover without user intervention is achieved, then ease of operation and user experience are improved, but control and monitoring difficulty increase
Solution Approach 1:
The handover mechanism implements self-service by enabling the user equipment to autonomously perform handover operations without requiring user intervention. The device automatically monitors signal conditions, selects appropriate target networks, and executes handover procedures based on pre-configured policies and real-time network feedback. This provides seamless ease of operation for users while the system maintains control through automated monitoring and management functions that track handover events and session states.
Data Source
AI summary
Methods, systems, and apparatus can be used to provide handover of on-hold sessions in converged networks. In various example implementations, an on-hold session between a mobile communication device and a fixed packet network-connected peer CPE can be handed over from a fixed packet domain to a cellular domain, and vice versa. In various example implementations, an on-hold session between a mobile communication device and a PSTN-connected peer CPE can be handed over from a fixed packet domain to a cellular domain, and vice versa.