基于订阅推送的NDN实时通信机制  

Subscription push based real-time communication mechanism for NDN

作　　者：靳鹏飞[1,2] 李俊[1] 吴海博[1] 智江 

机构地区：[1]中国科学院计算机网络信息中心,北京100190 [2]中国科学院大学,北京100049

出　　处：《高技术通讯》2016年第6期558-566,共9页Chinese High Technology Letters

基　　金：973计划(2012CB315803);CNIC所级专项(CNIC_PY-1401);中国科学院知识创新工程青年人才领域(CNIC_QN_1508)资助项目

摘　　要：研究了代表未来互联网体系结构发展方向的命名数据网络(NDN)的实时通信机制。研究发现,NDN用户通过发送请求包(Interest)获得对应数据(Data),而对于实时通信类应用(如即时聊天、物联网监控等),由于数据源的数据产生存在突发性和随机性,而且存在数据接收时延,传统NDN用户驱动的"拉"模式数据获取方式,难以实现用户请求速率与数据产生速率的同步,无法满足实时通信应用需求。从减小数据接收延迟出发,在不改变原NDN路由缓存机制的基础上提出了一种基于订阅推送的NDN实时通信机制,该机制通过提前在路由器中添加订阅信息,实现实时数据源的即时推送。相关理论分析和仿真实验表明,该机制在实时数据接收延迟上明显优于传统NDN方法。The study focused on the real-time communication mechanism of the promising Internet architecture of named data networking （ NDN） , and pointed out that NDN users obtain contents by sending out request messages, while for real-time communications such as instant chatting or monitoring Internet of things, the synchronization of the re-quest rate of users and the data production rate is difficult to realize and the needs of real-time applications are una-ble to meet when using the conventional user-driven pull mode for data requiring because of data generation’ s ab-ruptness and randomness as well as the time delay of data receiving.For the purpose of reducing the data response delay, the study presented a subscription-push-based real-time communication mechanism on the basis of unmodify-ing conventional NDN routing and caching mechanisms.Under the new mechanism, the subscription information is added into NDN routers in advance, and later thereal-time producercould pushdata to the subscriber immediately. The experimental results show that this new mechanism can greatly reduce the reception delay compared with the original NDN design.

关 键 词：命名数据网络( NDN) 实时通信 订阅 推送 

分 类 号：TN915.02[电子电信—通信与信息系统]