School Campus emergency communication systems are vital for safeguarding student safety during sudden disasters such as typhoons, which frequently cause widespread paralysis of communication infrastructure. Traditional Delay-Tolerant Network (DTN) protocols, such as Direct Delivery and First Contact, struggle to maintain reliable connections in such scenarios due to high latency and low delivery rates. This paper proposes the Activity-based First Contact (A-FC) protocol, an innovative routing scheme that leverages real-world social roles to overcome network partitioning by mandatorily uploading messages to highly active "staff nodes". We constructed a real-world evaluation scenario based on the topology of Fuzhou No. 1 Middle School. Simulation results demonstrate that the A-FC protocol significantly outperforms baseline protocols, achieving approximately 68% message delivery probability and reducing average delay to 4311 seconds. With an average hop count of merely 1.68, this protocol establishes a low-cost, highly reliable backup communication model for school campus disaster response.

翻译：校园应急通信系统对于在台风等突发灾害中保障学生安全至关重要，此类灾害常导致通信基础设施大面积瘫痪。传统的容迟网络协议，如直接投递和首次接触，由于高延迟和低投递率，在此类场景中难以维持可靠连接。本文提出基于活动性的首次接触协议，这是一种创新的路由方案，它通过强制将消息上传至高活跃度的“教职工节点”，利用现实世界中的社会角色来克服网络分区问题。我们基于福州第一中学的拓扑结构构建了真实评估场景。仿真结果表明，A-FC协议显著优于基线协议，实现了约68%的消息投递概率，并将平均延迟降低至4311秒。该协议平均跳数仅为1.68，为校园灾害响应建立了一种低成本、高可靠性的备用通信模型。