一种自组织时间同步网

A self-organizing timekeeping network

基于NTP协议构建大规模网络的时间同步网时,必须在网络每一节点上事先进行参数配置,如同步源地址等。这种网络拓扑是静态的,时间同步操作必然会受到网络环境变化的制约和影响。扩展定义两个新的NTP包SRP和SAP,将同步源抽象为一种资源,应用网格计算中的分布式资源发现方法,动态的根据网络环境变化以及节点的能力差异配置参数,进而构成了一种自组织时间同步覆盖网。该方法不仅对于NTP协议的进一步完善研究有参考价值,而且使时间同步更可靠、经济、灵活。

It is necessary for every node in large scale networks to set configuration parameters like timekeeping peers addresses, while constructing a timekeeping network based on NTP(Network Time Protocol). However, the topology is static, and the operation of time synchronization will be limited and influenced by the changing network environment. Two new NTP packets are extended which are called as SRP and SAP. The timekeeping peers are abstracted as a kind of resources, then apply the methodology of fully decentralized resource discovery in Grid computation to dynamically reset configuration parameters according to network environment change and variant of node ability, and finally form a self-organizing timekeeping overlay network. This method is valuable for further NTP research development, and makes network timekeeping more reliable, economic and flexible.