IMS Multi-Session Control via Dedicated Session Ports
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Solution Overview
Problem
Existing multi-session service architectures in IMS networks fail to provide centralized control over services when a new session is initiated to a user accessing the network from the CS domain, leading to resource deficiencies and inability to hold or manage multiple sessions effectively.
Innovation Solution
A method and system that allocate dedicated session ports and bearer channels within the IMS domain for each session, allowing centralized control and resource management, enabling seamless connection and operation of multiple sessions by allocating the first session port to the first bearer channel for use between the CS and IMS domains and the second session port to the second UE for use in the IMS domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the second session is connected to the port of the first session and the bearer of the first session is reused, then network resources are saved, but it becomes impossible to hold the first session and implement multi-session service
Solution Approach 1:
The patent segments the session port resources by introducing a dedicated session port (second session port) for the second session, separate from the first session port. This segmentation allows each session to have its own dedicated port resources in the IMS domain, enabling independent control and management of multiple sessions simultaneously, thus resolving the contradiction between resource efficiency and multi-session capability.
Solution Approach 2:
The patent introduces the MGCF (Media Gateway Control Function) as an intermediary entity that mediates between the CS domain and IMS domain. The MGCF allocates dedicated session ports for sessions originating from CS domain users, acting as a bridge that enables proper resource management and session control, allowing multiple sessions to be handled independently while maintaining resource efficiency.
2Reliability
If centralized service control is implemented through an AS in the IMS network, then consistent service experience is provided, but resource deficiencies occur when a new session is initiated
Solution Approach 1:
The patent applies preliminary action by pre-allocating dedicated session ports for CS domain users before sessions are actually established. When a CS domain user needs to initiate a session, the MGCF has already prepared the necessary session port resources, eliminating resource deficiency issues during session establishment while maintaining centralized control through the AS.
Solution Approach 2:
The patent introduces dynamic resource allocation where session ports are allocated on-demand based on actual session requirements. The MGCF dynamically assigns session ports from available pools, allowing the system to adapt resource allocation to actual usage patterns, thus preventing resource deficiencies while maintaining centralized service control consistency.
3Adaptability or versatility
If session ports are allocated for each session in the IMS domain, then multi-session service is enabled, but device complexity increases
Solution Approach 1:
The patent extracts the session port allocation and management functions from the general service control architecture and places them in the dedicated MGCF entity. This extraction consolidates the complexity of managing multiple session ports in a specific component, allowing the rest of the system to handle sessions more simply while the MGCF manages the port allocation complexity centrally.
Data Source
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AI summary
A method, a system, an AS, and an MGCF for providing multi-Session services for users are disclosed. The method includes: sending a session setup request from the third UE to the first UE or from the first UE to the third UE to set up a second session when the first UE and the second UE perform the first session through the first session port and the second session port in the IMS domain; holding the first session, and allocating a third session port in the IMS domain; and connecting the bearer channels of the first UE, the second UE and the third UE through the first bearer channel, the first session port, the second session port and the third session port according to the operation instruction selected by the first UE. Through the embodiments of the present invention, multi-session services are provided for the users who access the network from the CS domain under centralized control of the IMS domain.