QoS Flow Selection for Low-Latency Service Transmission
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Solution Overview
Problem
In real-time video transmission services, such as cloud gaming and extended reality, the excessive workload on cloud servers can lead to prolonged service delays due to a large quantity of tasks, compromising the stability and reliability of service transmission.
Innovation Solution
A service transmission method and apparatus that utilizes quality of service (QoS) flows or protocol data unit (PDU) sets with varying packet delay budgets (PDBs/PSDBs) to ensure timely and reliable service delivery by selecting appropriate QoS flows or PDU sets based on network status and importance, adjusting priorities and importance levels as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cloud processing is used to handle real-time video transmission services, then data transmission capacity is improved, but service transmission delay increases when task quantity is excessive
Solution Approach 1:
The patent segments the service transmission into multiple QoS flows with different priority levels. The access network device divides the N QoS flows into M selected QoS flows for actual transmission, separating critical services from non-critical ones to ensure delay requirements are met while maintaining overall data transmission capacity.
Solution Approach 2:
The patent changes the parameter of QoS flow selection by dynamically adjusting which QoS flows are activated based on network conditions and delay requirements. The access network device modifies the set of active QoS flows from N to M, where M ≤ N, to optimize the balance between data capacity and transmission delay.
2Loss of time
If multiple QoS flows with different packet delay budgets are used, then service transmission delay is ensured, but device complexity increases
Solution Approach 1:
The access network device autonomously performs QoS flow selection and management without requiring complex external coordination. It automatically determines which M QoS flows to activate from the N available flows based on preset rules and network conditions, reducing the need for complex inter-device communication and control mechanisms.
Solution Approach 2:
The patent implements dynamic QoS flow selection where the access network device can flexibly adjust the set of active QoS flows based on real-time network conditions. The mapping between N QoS flows and M selected QoS flows is not fixed but can be dynamically reconfigured to adapt to changing service requirements and network status.
Data Source
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AI summary
A service transmission method and apparatus are disclosed. The service transmission method includes: An application function network element indicates N QoS flows or N PDU sets to an access network device. The access network device may select, from the N QoS flows or the N PDU sets based on a plurality of factors such as a current network status and a channel status, M QoS flows or M PDU sets that can ensure a current service transmission delay, and indicate the M QoS flows or the M PDU sets to the application function network element. The application function network element selects, from the M QoS flows or the M PDU sets, a QoS flow or a PDU set used for service transmission. The service transmission delay can be ensured by using the service transmission method in embodiments of this application.