Job management system is the middleware software based on the operating system , for the purpose of strengthening the batch processing of os , providing the mechanism of job submitting , scheduling , executing and controlling . thereby , the system resources can be utilized effectively , the network load can be balanced , and the system performance can be improved 作业管理系统是建立在操作系统之上的一类中间件软件，目的在于强化操作系统的批处理功能，提供对作业的提交、调度、执行及控制等机制，从而能够更加有效地利用系统资源、平衡网络负载、提高系统的整体性能。
In the leach - new protocol , the mainly improvement of the leach protocol exhibits as follow : for the sake of balancing the network load , the network choose the clusters based on the residual energy ; we take multi - hop communication between sensors instead of single - hop communication , which results in the reduction of energy consumption of clusters ; the new protocol finds the path to the cluster head with the minimum cost , using an algorithm similar to flooding to propagate the cost information and greedy algorithm to find the lowest cost link ; the algorithm for assigning tdma time slot reduces overall delays of network 在leach - new协议中,对leach协议的改进主要体现在以下几个方面:根据节点剩余能量选择簇头,以平衡网络负载;节点间采用多跳路由,降低簇头能量消耗;节点根据能量消耗的代价来选择至簇头的路由,通过扩散算法来广播代价消息,采用贪婪算法来选择能量消耗最小的路径;采用tdma时隙分配算法减少网络时延。最后,利用ns2仿真软件进行验证。
