Multicast Video Delivery Optimization in 4G Cellular Networks
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Solution Overview
Problem
Existing methods for multicast video delivery in 4G cellular networks are inefficient due to limitations in supporting varying channel conditions for different users, as they rely on traditional non-scalable video encoding and lack effective radio resource allocation strategies.
Innovation Solution
A method that collects client feedback to determine supportable modulation and coding schemes, prioritizes video packets based on utility, and optimizes radio resource allocation using dynamic programming to assign appropriate modulation and coding schemes for each frame, thereby maximizing system utility without modifying existing video encoding or wireless air interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional non-scalable video encoding is used, then video transmission can be simplified, but the system cannot adapt to varying channel conditions of different users
Solution Approach 1:
The patent segments the video transmission into priority levels (high priority and low priority packets) and applies different modulation and coding schemes to each segment based on user channel conditions. This allows the system to adapt to varying channel conditions without requiring complex end-to-end video encoding modifications, thus resolving the contradiction between adaptability and complexity.
2Reliability
If radio resource allocation is optimized for each user, then video transmission quality improves, but system complexity increases
Solution Approach 1:
The patent applies local quality by assigning different modulation and coding schemes to different users based on their individual channel conditions. Each user receives customized radio resource allocation tailored to their specific requirements, improving transmission quality while maintaining manageable system complexity through localized optimization rather than global reconfiguration.
3Adaptability or versatility
If scalable video coding is used, then the system can support varying channel conditions, but the video encoding becomes more complex
Solution Approach 1:
The patent extracts the adaptation functionality from the video encoding layer and places it at the radio resource allocation layer. Instead of modifying complex video encoding to handle varying channel conditions, the system uses standard video encoding and handles adaptability through radio resource management, thereby maintaining ease of manufacture while achieving the desired adaptability.
Data Source
AI summary
A method for video multicast delivery for 4g wireless networks includes collecting client feedback and obtaining supportable modulation and coding scheme MCS for each client over a base station of wireless network, prioritizing video packets for said clients and setting a utility for each of the video packets; performing a radio resource allocation for determining a utility optimization for transmitted frames of the video packets; and assigning an MCS to each transmitted frame of the video packets, responsive to step performing a radio resource allocation.