Transmitter Video Frame Modulation and Coding Scheme Adjustment
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Solution Overview
Problem
Current transmitter communication devices face challenges in efficiently transmitting video data in mobile networks due to tight delay budgets, which result in reduced spectral efficiency and quality of experience (QoE) due to the need to allocate more channel resources at low signal-to-interference-plus-noise ratio (SINR), leading to unsatisfactory trade-offs between data rate and latency.
Innovation Solution
A transmitter communication device that adjusts modulation and coding schemes (MCS) based on the temporal position of video frames within a group, allowing for unequal error protection and optimized spectral efficiency without compromising QoE, by processing each frame with a different MCS and discarding less critical frames during congestion to ensure fast re-synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel resources are allocated to serve UE at low SINR to meet tight delay budget, then QoE is improved, but spectral efficiency deteriorates
Solution Approach 1:
The patent applies different MCS indices to different video frames based on their temporal position and importance. Critical frames (e.g., I-frames at beginning of GOP) receive more robust transmission with lower MCS indices, while less critical frames receive higher MCS indices. This local differentiation allows the system to protect only the most important data, maintaining QoE while improving overall spectral efficiency.
Solution Approach 2:
The patent dynamically changes the MCS parameter based on the temporal position within a GOP structure. By adjusting the MCS index according to frame importance and position, the system adapts the transmission reliability to match the actual needs of different video frames, resolving the contradiction between uniform high reliability and spectral efficiency.
2Loss of time
If more channel resources are allocated to ensure transmission at low SINR, then delay budget is met, but data rate deteriorates
Solution Approach 1:
The patent applies differential protection strategies to different frames within a GOP. Only frames that are critical for video decoding (such as I-frames and early P-frames) receive enhanced protection through lower MCS indices. Less critical frames use higher MCS indices, maximizing the data rate while ensuring that frames essential for maintaining video quality and synchronization are transmitted reliably within the delay budget.
Solution Approach 2:
The patent introduces asymmetric treatment of video frames based on their position and type within the GOP structure. Rather than applying symmetric protection to all frames, the system applies stronger protection asymmetrically to only those frames whose loss would cause significant QoE degradation, allowing higher data rates for less critical traffic.
3Device complexity
If same MCS is allocated to all users in eMBMS, then implementation is simplified, but spectral efficiency deteriorates unnecessarily
Solution Approach 1:
The patent applies different MCS indices to different video frames based on their temporal position and importance. Critical frames (e.g., I-frames at beginning of GOP) receive more robust transmission with lower MCS indices, while less critical frames receive higher MCS indices. This local differentiation allows the system to protect only the most important data, maintaining QoE while improving overall spectral efficiency.
Solution Approach 2:
The patent dynamically changes the MCS parameter based on the temporal position within a GOP structure. By adjusting the MCS index according to frame importance and position, the system adapts the transmission reliability to match the actual needs of different video frames, resolving the contradiction between uniform high reliability and spectral efficiency.
4Device complexity
If all video packets are treated equally regardless of criticality, then processing is simplified, but QoE deteriorates due to unnecessary packet loss
Solution Approach 1:
The patent applies different MCS indices to different video frames based on their temporal position and importance. Critical frames (e.g., I-frames at beginning of GOP) receive more robust transmission with lower MCS indices, while less critical frames receive higher MCS indices. This local differentiation allows the system to protect only the most important data, maintaining QoE while improving overall spectral efficiency.
Solution Approach 2:
The patent dynamically changes the MCS parameter based on the temporal position within a GOP structure. By adjusting the MCS index according to frame importance and position, the system adapts the transmission reliability to match the actual needs of different video frames, resolving the contradiction between uniform high reliability and spectral efficiency.
Data Source
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AI summary
The invention relates to a transmitter communication device (101) configured to provide video data to a receiver communication device (120), wherein the video data comprises one or more groups of frames (111, 113) and each group of frames comprises a plurality of temporally successive frames. The transmitter communication device (101) comprises a processor (103) configured to process a first frame of a current, i.e. currently processed group of frames using a first modulation and coding scheme of a plurality of modulation and coding schemes and to process a second frame of the current group of frames using a second modulation and coding scheme of the plurality of modulation and coding schemes, wherein the processor (103) is configured to select the second modulation and coding scheme of the plurality of modulation and coding schemes on the basis of a temporal position of the second frame relative to the first frame of the current group of frames. The processor (103) can be further configured to remove or drop one or more frames from the current group of frames. The transmitter communication device (101) further comprises a communication interface (105) configured to transmit the current group of frames including the first frame and the second frame to the receiver communication device (120). Moreover, the invention relates to a corresponding method.