Dual Priority Bearers for Video Streaming Latency
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Solution Overview
Problem
Wireless communication systems face challenges in maintaining low latency and throughput for video streaming due to the use of single bearers for multiple Internet services, leading to issues like video stalling and reduced quality of service.
Innovation Solution
Implementing dual bearer application data streaming, where a user equipment (UE) identifies a default bearer and requests the establishment of a high-priority bearer based on the status of its playout buffer, switching between bearers to optimize data transmission and quality of service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single bearer is used for multiple Internet services, then device complexity is reduced, but video streaming quality and latency performance deteriorate
Solution Approach 1:
The patent segments the single bearer into multiple bearers with different priority levels (first bearer with normal priority, second bearer with high priority). This segmentation allows video streaming traffic to be separated from other Internet services, ensuring that video data receives dedicated high-priority transmission resources while maintaining overall system manageability through structured bearer division.
2Device complexity
If a single bearer is used for multiple Internet services, then system simplicity is maintained, but latency increases and video stalling occurs
Solution Approach 1:
The patent implements dynamic bearer selection based on buffer status monitoring. When the video buffer level falls below a threshold, the system automatically switches to the high-priority second bearer to accelerate data reception and reduce latency. This dynamic adaptation allows the system to maintain simplicity during normal operation while activating priority bearers only when needed, thereby reducing video stalling and latency without permanently increasing system complexity.
3Reliability
If a high-priority bearer is established for video streaming, then video streaming quality improves, but cell capacity utilization is negatively affected
Solution Approach 1:
The patent applies local quality by assigning different priority levels to different bearers based on their intended use. The high-priority second bearer is specifically optimized for video streaming traffic, while the normal-priority first bearer handles other Internet services. This localized quality assignment ensures that cell capacity is preferentially allocated to video streaming when needed, improving video quality without unnecessarily reserving capacity for all traffic types.
Solution Approach 2:
The patent changes the priority parameter of bearers dynamically based on buffer status. When video buffer levels are sufficient, the system uses the normal-priority first bearer, conserving high-priority resources. When buffer levels drop below thresholds, the system switches to the high-priority second bearer, intensively utilizing cell capacity only when necessary to maintain video playback. This parameter change strategy balances video quality requirements with overall cell capacity utilization.
Data Source
AI summary
A user equipment (UE) may identify a bearer (e.g., a default bearer) and request establishment of a second bearer (e.g., a high priority bearer) for use in streaming downlink data from, for example, an application server. The UE may determine a status of a playout buffer and select the first bearer or the second bearer for use in streaming the downlink data associated with the application based on the status of the playout buffer. For example, the first bearer may be used be used by default, and the second bearer may be selected if the amount of data in the playout buffer does not satisfy (e.g., is below) a threshold. In some cases, each bearer may be associated with a transmission control protocol (TCP) port associated with a TCP connection. In some cases, each bearer may be associated with different Internet protocol (IP) address.