Wireless Service Migration Using QoS Flow and PDU Session Context
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Solution Overview
Problem
Existing communication systems fail to ensure seamless service continuity and stability when users switch between multiple terminal devices, leading to increased user stagnation and degraded experiences, particularly in scenarios requiring real-time services like live broadcasts or video streaming.
Innovation Solution
A method for wireless communication that allows a target service to be migrated from a first terminal device to a second device by sending a request to a network device, specifying the target service's QoS flow, PDU session, and associated terminal devices, enabling the network to manage the migration efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a user terminates the target service on the first terminal device and then starts it on the second terminal device, then the user can switch between terminal devices, but the service continuity is broken and user experience is degraded
Solution Approach 1:
The system performs preliminary actions by establishing service context and state information before the actual terminal switch occurs. The network device stores service context information including QoS flow identifiers, PDU session identifiers, and terminal device identifiers in advance, enabling seamless service resumption when the user switches terminals.
Solution Approach 2:
The network device acts as an intermediary between terminal devices to maintain service continuity. It manages the service context information and coordinates the migration process, transferring service state from the first terminal device to the second terminal device without requiring service termination or restart by the user.
2Reliability
If the system manages service migration between terminal devices, then service continuity is maintained, but the network device complexity increases
Solution Approach 1:
The service context information is segmented into distinct components including QoS flow identifiers, PDU session identifiers, terminal device identifiers, and service state information. This segmentation allows the network device to manage and transfer specific service elements independently, reducing overall system complexity while maintaining service continuity.
3Stability of the object's composition
If the system optimizes QoS flow and PDU session management for service migration, then service stability is improved, but the processing time and resource consumption increase
Solution Approach 1:
The network device performs preliminary actions by pre-establishing service context information and maintaining it in storage. When service migration is needed, the system quickly retrieves and transfers this pre-prepared information, significantly reducing migration processing time while maintaining service stability through proper QoS and PDU session management.
Data Source
AI summary
A terminal device, which is a target terminal device, includes a transceiver, a processor and a memory. The memory is configured to store computer-executable instructions. The processor is configured to invoke and execute the computer-executable instructions stored in the memory to perform an operation of: sending, via the transceiver, a first request to a network device, the first request being used to request migration of a target service from a first terminal device to a second terminal device. The target terminal device is the first terminal device or the second terminal device.