Satellite Video Management System Multicast Bandwidth Allocation
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Solution Overview
Problem
Conventional videoconferencing systems over terrestrial networks are costly, inefficient, and prone to failure due to cumulative bandwidth requirements for unicast connections, which become increasingly expensive and unreliable as the number of participants grows.
Innovation Solution
A satellite-based videoconference system that uses multicast technology to dynamically allocate bandwidth and resources, allowing a single video/audio signal to be received by multiple recipients, reducing satellite consumption and efficiently managing frequency allocation to support high-definition calls across geographically dispersed locations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unicast connections are used for videoconferencing, then each terminal can send and receive video signals bidirectionally, but the total bandwidth required is cumulative and becomes increasingly expensive as the number of participants grows
Solution Approach 1:
The patent combines multiple unicast connections into a single multicast connection. Instead of establishing separate bidirectional connections between each pair of terminals, a single multicast stream is transmitted from the source terminal to all receiving terminals simultaneously, merging multiple data paths into one efficient channel.
Solution Approach 2:
The multicast connection serves multiple functions simultaneously: it provides video signal distribution to multiple recipients, enables bidirectional communication through separate return channels, and supports dynamic bandwidth allocation. This single multicast infrastructure replaces multiple dedicated unicast connections.
2Adaptability or versatility
If multiple unicast connections are established for videoconferencing, then all terminals can participate in the conference, but the system becomes costly and inefficient
Solution Approach 1:
The patent merges the function of managing multiple individual connections into a single multicast group management system. The gateway terminal and network infrastructure handle the complexity of serving multiple participants through a unified multicast protocol, eliminating the need to manage separate connection states for each participant pair.
Solution Approach 2:
The patent introduces a multicast gateway or network intermediary that manages the complexity of multi-participant communication. This intermediary handles the multicast stream distribution, bandwidth allocation, and coordination between terminals, reducing the management burden on individual terminals and simplifying the overall system architecture.
3Reliability
If unicast bi-directional connections are used between video terminals, then each connection can be established with sufficient bandwidth, but the total bandwidth required is cumulative
Solution Approach 1:
The patent combines multiple bandwidth-consuming unicast connections into a single multicast stream that carries the video signal to all recipients simultaneously. The bandwidth required is equivalent to one connection rather than the cumulative bandwidth of all possible pairwise connections, dramatically reducing total bandwidth consumption while maintaining sufficient quality for all participants.
4Ease of operation
If satellite bandwidth is allocated statically, then resource allocation is simple, but the system cannot efficiently support dynamic videoconferencing demands
Solution Approach 1:
The patent implements dynamic bandwidth allocation where satellite resources are automatically adjusted based on real-time videoconferencing demands. The system monitors network conditions, participant numbers, and quality requirements to dynamically allocate satellite bandwidth, ensuring high-definition quality when needed while efficiently utilizing available resources during lower-demand periods.
Solution Approach 2:
The patent changes the allocation parameters of satellite bandwidth from fixed static values to dynamic variables that adjust based on system conditions. This includes modifying bandwidth allocation, transmission power, and resource prioritization parameters in response to changing videoconference requirements, enabling the system to maintain high quality while adapting to varying demands.
Data Source
AI summary
A videoconference system has videoconference terminals which communicate with a centralized station over satellite. Video signals from each videoconference terminal are unicast to the centralized station via satellite. The centralized station forms a composite signal of all the video signals multicasts the composite signal to the local videoconference terminals over satellite that can be received by hundreds, thousands or more recipients. The system dynamically allocates satellite bandwidth and other network resources to establish a high definition videoconference call on demand. A frequency allocation manager manages the resources available on the satellite network according with the capacity of each transponder and network resources available. It administrates the resources available and dynamically assigns a satellite capacity and network resources.