## 1 Introduction
Recent efforts in hybrid P2P-CDN systems have demonstrated that integrating peer-based transmission with adaptive delivery and edge-assisted computing can reduce latency and improve user experience in live video streaming [28]. However, these hybrid approaches often rely on centralized coordination or edge servers, which reintroduce single points of failure and limit true decentralization. Moreover, recent studies (e.g., [7; 29; 30]) have shown that even advanced P2P and hybrid systems may suffer from recovery delays exceeding 3-5 s and packet loss spikes above 1% under adverse conditions, whereas our proposed system achieves sub-second recovery and maintains packet loss below 0.5% in multi-hop scenarios. This quantifiable performance gap underscores the necessity for more robust, self-healing architectures. In summary, the proposed system distinguishes itself from recent works by introducing a fully decentralized, chain-based relay architecture with intelligent self-healing mechanisms. Unlike prior solutions, our approach enables rapid fault detection and autonomous relay path reconstruction, minimizing service interruption and ensuring stable video quality even in highly dynamic or adverse network environments. The following sections detail the system design, experimental methodology, results, and discussion, providing a comprehensive analysis of the proposed approach and its advantages over existing methods. Based on these premises, this paper proposes a decentralized chain-topology-based multi-venue real-time broadcasting system that integrates the SRT protocol, IPv6 networks, and intelligent fault recovery mechanisms. The main contributions of the paper are as follows:  
* We propose an IPv6-enabled direct-connected P2P transmission architecture, significantly reducing bandwidth and hardware performance overhead of traditional centralized streaming solutions, avoiding complexities associated with traditional NAT traversal methods, and enabling streamlined connectivity and efficient network scalability, as illustrated in Figure 1. This architecture allows for direct inter-node communication, eliminating the need for complex NAT traversal techniques and enabling efficient resource utilization across distributed nodes. * Leveraging the Secure Reliable Transport (SRT) protocol, we achieve low-latency, high-reliability video streaming. SRT's selective retransmission, congestion-aware control, and AES-128/256 encryption mechanisms collectively ensure secure and resilient data transport. * We introduce a WebSocket-driven real-time fault detection and rapid self-healing mechanism capable of detecting faults at millisecond granularity and restoring network links within seconds, substantially improving system robustness. * Extensive evaluations conducted under diverse network conditions and hardware configurations demonstrate the superior performance of the proposed system, including minimal end-to-end latency, sustained high video quality, and exceptional stability and reliability against link disruptions. Our system strategically employs IPv6 direct-connected P2P transmission topology, effectively eliminating the complexities of traditional NAT traversal. We further integrate SRT protocol's reliable transport mechanisms, which, leveraging UDP's speed, ensure low latency, robust data transfer through selective retransmission and advanced congestion  
Figure 1: System architecture overview. control, and provide end-to-end security via AES-128/256 encryption. To specifically enhance resilience, we introduce a WebSocket-based real-time fault detection algorithm and a fallback self-healing mechanism, achieving millisecond-level fault discovery and second-level link reconstruction. Through comprehensive performance evaluations, we validate the effectiveness of the system across various network environments and hardware platforms, demonstrating its superior end-to-end latency, video quality stability, and link fault tolerance.