基于移动Ad hoc网络的服务管理研究

本文基于移动Ad hoc网络的广播特性、分簇的普遍性等特点，在分析分布式服务发现协议GSD等的基础上，提出了新的服务发现机制，该机制考虑了各节点处理能力、存储能力以及所提供的服务种类等不可能完全相同的特性，克服了GSD同等对待所有节点的缺欠；另外，文中提出了基于优先级和两步资源预约的服务调度和QoS分配方式，依据服务所请求的QoS级别和资源情况来确定合适的端到端QoS级别，保证资源的充分利用，并给出了算法的一个实际应用的例子，该算法考虑了资源的抢占和两步方式的资源预约，比普通的确定QoS级别的算法具有更高的预约成功率，而比仅依据优先级的算法具有更高的资源利用率。

Research on Service Management Based on Mobile Ad hoc Network

Based on the broadcasting characteristic and generality of clustering in mobile Ad hoc network,this paper presents a new service discovery mechanism based on the analysis of the distributed service discovery protocol GSD. The mechanism considers the processing,storage ability and provides services difference of different nodes rather than considering each node entirely peer-to-peer as in GSD. Furthermore,this paper presents a new service schedule algo- rithm based on priority and two-phase resource reservation and a QoS assignment mechanism which determines the end-to-end QoS level according to the requested QoS level and resources state. An example using the algorithm is pre- sented. The algorithm has higher reservation success rate and higher resource usage considering the resource preemp- tion and two-phase reservation mechanism.