EQAM De-jitter Memory Repurposing for M-CMTS Priority Queues
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Solution Overview
Problem
In cable television network edge modulation devices, the existing de-jitter memory used for video processing is not efficiently utilized for Quality of Service (QoS) queue processing, leading to suboptimal handling of priority queues and potential congestion in DOCSIS packet streaming protocols.
Innovation Solution
The de-jitter memory in edge quadrature amplitude modulation (EQAM) devices is repurposed to support M-CMTS DEPI PSP session priority queues, allowing for the allocation and management of memory resources to handle increased jitter and prioritize packet data effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If de-jitter memory is used for video processing, then video transmission quality is improved, but memory resources are not efficiently utilized for QoS queue processing
Solution Approach 1:
The patent applies multi-functionality by enabling the de-jitter memory to serve dual purposes: traditional video de-jittering operations and QoS priority queue processing. The system dynamically allocates memory regions within the de-jitter buffer to handle both video stream stabilization and packet prioritization for different service classes, thereby improving memory resource utilization efficiency without compromising video transmission quality.
2Reliability
If strict priority de-queuing is used for multiple priority queues, then packet prioritization is improved, but device complexity increases
Solution Approach 1:
The patent merges the priority queue management functionality into the existing de-jitter buffer structure. Instead of implementing separate complex queue management systems, the invention integrates priority-based packet selection and de-queuing operations within the de-jitter memory allocation framework, thereby achieving packet prioritization while reducing overall device complexity through consolidation of functions.
3Reliability
If DEPI L2TPv3 PSP sessions are mapped 1:1 per QAM channel, then session management is improved, but memory consumption increases
Solution Approach 1:
The patent applies local quality by implementing differentiated memory allocation strategies for different session types and priority levels within the de-jitter buffer. Instead of uniform memory allocation across all QAM channels and sessions, the system dynamically adjusts memory region sizes based on the specific requirements of each session, allowing more efficient memory utilization while maintaining proper session management for DEPI L2TPv3 PSP traffic.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This repurposing of memory resources enhances the EQAM's ability to manage jitter and prioritize packets, improving the overall Quality of Service (QoS) by efficiently processing DOCSIS PSP sessions and reducing congestion, thereby ensuring smoother video and data transmission.
Implementation Method 1
It then uses QAM modulation to digitally modulate the digital transport stream onto a downstream RF carrier
Data Source
AI summary
Methods, systems, and apparatus can be used to repurpose MPEG-TS de-jitter memory for DEPI DOCSIS PSP priority queues processing.