Session Management for Seamless Terminal Handover
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Solution Overview
Problem
The existing wireless communication systems face challenges in managing mobility and session procedures efficiently, particularly when the mobility management procedure is triggered before the session management procedure is completed, leading to potential connection failures during handovers.
Innovation Solution
A method and apparatus that involve transmitting bearer management messages and handover requests between source and target base stations, including lists of managed bearers, to ensure seamless handover and complete bearer management, even if the bearer management is not fully completed, by generating and managing bearer lists to secure resources and release unnecessary bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the mobility management procedure is triggered before the session management procedure is completed, then the handover speed is improved, but the connection reliability deteriorates due to potential connection failures
Solution Approach 1:
The patent applies preliminary action by having the source base station prepare and transmit bearer list information to the target base station before the handover is actually executed. This allows the target base station to pre-allocate resources and prepare bearer contexts in advance, enabling faster handover execution without compromising connection reliability, as the necessary session management information is already in place.
Solution Approach 2:
The patent introduces an intermediary mechanism through the bearer list information that is exchanged between source and target base stations. This bearer list acts as a mediator that carries session management information during the handover process, allowing the target base station to properly manage bearers even when handover is triggered before session management is complete, thus maintaining both speed and reliability.
2Loss of time
If the mobility management procedure is triggered before the session management procedure is completed, then the handover responsiveness is improved, but the session management completeness deteriorates
Solution Approach 1:
The bearer list information serves as an intermediary that preserves session management information during rapid handovers. By transmitting this list from the source to the target base station, the patent ensures that no session management information is lost even when the handover is triggered before the session management procedure is fully completed, thus maintaining both responsiveness and completeness.
Solution Approach 2:
The patent applies preliminary action by having the source base station compile and transmit the bearer list information before handover execution. This preliminary transmission of session management information ensures that the target base station receives complete bearer management data in advance, preventing any loss of session management completeness while maintaining fast handover responsiveness.
3Manufacturing precision
If bearer management messages are transmitted during handover, then the bearer management accuracy is improved, but the signaling overhead increases
Solution Approach 1:
The patent extracts only the essential bearer list information needed for handover and transmits it separately, rather than transmitting complete bearer management messages. This extraction of necessary information achieves accurate bearer management at the target base station while minimizing signaling overhead by sending only the critical subset of information required for successful handover.
Data Source
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AI summary
A session management method and apparatus for managing mobility and session procedures integrally to improve manage the session of the terminal efficiently in the handover procedure. The session management method of a control entity includes transmitting a bearer management message for one of establishing, modifying, and releasing a bearer to a source base station, transmitting, when a handover of a terminal occurs before the bearer management is completed, a handover request including at least one of a first list including the bearers being managed by the source base station and a second list including the bearers being managed by the control entity to a target base station, and receiving a handover response from the target base station, wherein the handover response includes a bearer list generated based on one of the first and second list.