Bandwidth Broker for IPTV Channel Switching
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Solution Overview
Problem
Existing IPTV systems face challenges in managing bandwidth efficiently to ensure Quality of Service (QoS) during channel surfing, where frequent allocation and de-allocation of bandwidth lead to inefficiencies and potential service denials due to insufficient bandwidth.
Innovation Solution
A program delivery system that includes a computational device managing bandwidth allocation using a bandwidth broker, which stores state information to determine bandwidth requests and allocates resources based on current usage and channel requirements, switching between unicast and multicast methods as needed to optimize bandwidth utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If bandwidth is allocated and de-allocated frequently during channel surfing, then channel switching capability is improved, but bandwidth management efficiency deteriorates and service denials occur
Solution Approach 1:
The system performs preliminary actions by pre-allocating bandwidth resources and maintaining state information about active programs before channel switching is requested. The bandwidth broker keeps track of allocated bandwidth and program states in advance, so when a channel change occurs, the system can quickly release only the necessary bandwidth without performing full allocation/deallocation cycles, thereby maintaining fast channel switching while improving bandwidth management efficiency
Solution Approach 2:
The bandwidth broker implements a feedback mechanism that continuously monitors the state of active programs and currently allocated bandwidth. This feedback loop allows the system to make informed decisions about bandwidth allocation and release, adjusting resources dynamically based on actual usage patterns rather than relying on frequent complete reallocation cycles, thus resolving the contradiction between switching speed and management efficiency
2Reliability
If bandwidth is allocated for each program request, then QoS is ensured, but bandwidth utilization efficiency deteriorates due to redundant allocations
Solution Approach 1:
The bandwidth broker merges bandwidth allocation management for multiple programs by maintaining a consolidated view of allocated resources and their states. Instead of treating each program request as an isolated allocation event, the system combines management of multiple programs under a single broker that tracks overall bandwidth usage, identifies overlapping allocations, and consolidates resource management, thereby ensuring QoS for each program while eliminating redundant bandwidth allocations
Solution Approach 2:
The system implements discarding and recovering by releasing bandwidth resources immediately when programs are no longer active or when lower priority programs replace higher priority ones. The bandwidth broker continuously monitors program states and recovers allocated bandwidth for reallocation to new programs, preventing bandwidth hoarding and ensuring efficient utilization while maintaining QoS guarantees for active programs
Data Source
AI summary
Method, device, and storage medium for receiving a request for a program from a user device; querying bandwidth state information; identifying whether the bandwidth state information indicates that the user device is allocated bandwidth, based on a previous request for another program, that is at least equal to a required bandwidth to deliver the program; requesting a bandwidth based on an identification that the bandwidth state information indicates that the user device is not allocated bandwidth that is at least equal to the required bandwidth; receiving an indication that the requested bandwidth is provisioned; and deliver the program to the user device.