Session Management Network Element Survival Time Scheduling
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Solution Overview
Problem
Current 5G network architectures lack a solution for ensuring service continuity during application layer data packet transmission, particularly in ultra-reliable low-latency communication scenarios where interruptions can occur due to non-compliance with quality of service (QoS) requirements.
Innovation Solution
A method and apparatus that utilize survival time information to schedule data packets, where a session management network element receives and updates survival time information from a policy control network element, and sends it to an access network device and terminal device, ensuring that data packets are transmitted based on the duration of service that can survive without correct packet reception, thereby preventing interruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data packets are transmitted without survival time information, then transmission speed is faster, but service continuity cannot be ensured when QoS requirements are not met
Solution Approach 1:
The patent applies preliminary action by pre-calculating and signaling survival time information from the session management network element to the access network device before data packet transmission. This allows the access network device to proactively schedule packets with appropriate time gaps, ensuring service continuity can be maintained even if QoS requirements are not met, without adding complex real-time decision-making mechanisms.
2Reliability
If survival time information is used to schedule data packets, then service continuity is ensured, but transmission efficiency decreases due to additional scheduling constraints
Solution Approach 1:
The patent applies parameter changes by introducing survival time as a new scheduling parameter that modifies the transmission timing of data packets. The access network device uses this parameter to dynamically adjust packet scheduling intervals, ensuring that even when QoS requirements are not met, the service can continue without interruption. This parameter-based approach maintains transmission efficiency while ensuring service continuity.
3Reliability
If no survival time information is provided, then network element interaction is simpler, but application layer interruptions occur when packets are lost
Solution Approach 1:
The patent applies the intermediary principle by introducing survival time information as a mediator between the session management network element and the access network device. This intermediary parameter carries critical QoS compliance information without requiring complex direct communication protocols, enabling the access network device to make informed scheduling decisions that prevent application layer interruptions while maintaining simple network element interactions.
Data Source
AI summary
Embodiments of this application provide a service continuity implementation method, an apparatus, and a system, to ensure service continuity in an application layer data packet transmission process. The method includes: receiving, by a session management network element, first survival time information from a policy control network element, where the first survival time information indicates duration of a service that survives when a correct data packet is not received; determining, by the session management network element, the first survival time information as a binding parameter of a quality of service QoS flow; and sending, by the session management network element, second survival time information to an access network device, where the second survival time information is used to indicate the duration; and after receiving the second survival time information from the session management network element, scheduling, by the access network device, a data packet based on the second survival time formation.