Chunk-Based Scheduling for Wireless QoS
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Solution Overview
Problem
Existing adaptive streaming methods in wireless communication systems face challenges in distinguishing traffic types and managing Quality of Service (QoS) during network congestion, particularly with non-GBR bearers, leading to potential packet loss and interruptions in video streaming services.
Innovation Solution
Implementing a chunk-based scheduling method using an available bit rate (ABR) bearer, where user equipment requests and the eNB schedules data chunks based on time limit information, ensuring timely delivery and prioritizing packets that influence QoS, thereby maintaining service quality during congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If non-GBR bearer is used for transmitting video traffic, then network resource utilization is improved, but QoS differentiation and packet delivery reliability deteriorate
Solution Approach 1:
The patent segments video traffic into individual packets with unique identifiers, allowing the network to track and manage each packet separately. This enables reliable delivery of video packets over non-GBR bearers by providing mechanisms to identify, prioritize, and retransmit packets as needed, thus maintaining QoS differentiation while utilizing resource-efficient non-GBR bearers.
2Duration of action of stationary object
If adaptive streaming method is implemented, then streaming service continuity is improved, but traffic identification and QoS management become difficult
Solution Approach 1:
The patent implements feedback mechanisms where the network monitors packet delivery status, buffer levels, and network conditions, then adjusts resource allocation and scheduling decisions accordingly. This feedback loop enables automatic QoS management and traffic identification without complex manual configuration, maintaining streaming continuity while simplifying network operations.
3Reliability
If TCP re-transmission is performed for leaked packets, then data completeness is improved, but time limit compliance deteriorates
Solution Approach 1:
The patent employs preliminary actions by pre-buffering video packets at the user equipment before playback begins. This advance preparation creates a time buffer that allows the system to handle packet loss and re-transmissions without violating time limits for packet delivery, ensuring both data completeness and time limit compliance.
Data Source
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AI summary
The present invention relates to a chunk-based scheduling method and to a chunk-based scheduling apparatus, capable of improving QoS upon the occurrence of congestion in a wireless communication system. The method performed by a terminal according to one embodiment of the present invention comprises: a step of requesting a base station for chunk-based scheduling which uses an available bit rate bearer so as to receive chunk that constitutes traffic; and a step of receiving, from the base station, at least one chunk scheduled based on the time limit information of the chunk.