Multicast Unicast Admission Control via Centralized Resource Sharing
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Solution Overview
Problem
Existing multicast/unicast admission control methods waste bandwidth resources by not allowing sharing between services and result in high channel switching delays due to complex information exchange, leading to poor user experience and inefficient bandwidth utilization.
Innovation Solution
A centralized resource control system allocates and manages multicast/unicast resources, allowing for flexible sharing and reducing channel switching delays by authorizing AN to manage resources and perform local operations without frequent interactions with the RACS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If resources are respectively reserved for multicast service and unicast service, then the AC function is simple to implement, but bandwidth resources cannot be shared resulting in resource waste
Solution Approach 1:
The patent merges multicast and unicast admission control functions into a unified system. The RACS performs admission control for both service types, and the AN shares bandwidth resources between multicast and unicast services dynamically, allowing resource pooling and eliminating dedicated reservations.
Solution Approach 2:
The patent introduces dynamic resource allocation where the AN can flexibly adjust bandwidth allocation between multicast and unicast services based on current network conditions and service demands, rather than using static reserved resources. This enables efficient resource sharing while maintaining QoS guarantees.
2Reliability
If the AN actively reports channel joining information to the RACS, then unified AC operation is achieved, but information exchange becomes complex and channel switching delay increases
Solution Approach 1:
The patent segments admission control operations into two parts: initial multicast join requests are handled by the RACS for unified resource management, while subsequent channel switching operations are handled locally by the AN using pre-authorized resources, eliminating the need for repeated information exchange with the RACS.
Solution Approach 2:
The patent implements preliminary resource authorization where the RACS authorizes the AN with sufficient resources in advance. This allows the AN to perform channel switching operations locally without real-time communication with the RACS, significantly reducing switching delay while maintaining resource management reliability.
3Speed
If the AN performs local multicast AC function, then channel switching is fast, but resources cannot be shared with unicast service
Solution Approach 1:
The patent makes the AN multi-functional by enabling it to perform both local admission control for fast switching and dynamic resource sharing with unicast services. The AN receives resource authorization from the RACS and can independently manage both multicast channel switching and unicast resource allocation, achieving both speed and versatility.
Data Source
AI summary
A multicast/unicast admission control method, a multicast/unicast admission control device, and a multicast/unicast admission control system are provided. In the method, through centralized resource control of a resource and admission control subsystem (RACS), sharing of multicast/unicast resources is realized. The RACS allocates and authorizes resources to an access node (AN), the AN manages the obtained multicast resources under the authorization, and the resource allocation is adjusted through interaction when the multicast resources of the AN or the resources of the RACS are not sufficient.