A Multicast Scheme for Live Streaming Courses in Large-Scale, Geographically Dense Campus Networks

TL;DR

This paper introduces a two-layer dynamic multicast architecture tailored for large-scale campus networks, reducing redundant messages and enhancing security for live streaming courses in geographically dense environments.

Contribution

It proposes a novel RBS virtual domain multicast architecture that decreases message redundancy and incorporates secure group key exchange within campus networks.

Findings

Reduces multicast message redundancy by 10-30%.

Enables secure multicast group management with SAVI and WebRTC.

Supports dynamic multicast coverage in dense campus environments.

Abstract

Video courses have become a significant component of modern education. However, the increasing demand for live streaming video courses places considerable strain on the service capabilities of campus networks. The challenges associated with live streaming course videos in campus network environments exhibit distinct spatial distribution characteristics. The audience for specific video courses may be highly concentrated in certain areas, leading to a large number of users attempting to access the same live stream simultaneously. Utilizing a Content Delivery Network (CDN) to distribute videos in these campus scenarios creates substantial unicast pressure on edge CDN servers. This paper proposes a two-layer dynamic partitioning Recursive Bit String (RBS) virtual domain network layer multicast architecture specifically designed for large-scale, geographically dense multicast scenarios within campus networks. This approach reduces redundant multicast messages by approximately 10-30\% compared to the two-layer fixed partitioning method. Additionally, it establishes multicast source authentication capabilities based on Source Address Validation Improvement (SAVI) and facilitates secure multicast group key exchange using a concise exchange protocol within the WebRTC framework. In the next-generation data plane of programmable software-defined networks, the RBS stateless multicast technology can be integrated with the unique characteristics of large-scale, geographically dense campus network scenarios to dynamically and efficiently extend multicast coverage to every dormitory.