中文摘要：

针对现有服务发现协议存在的问题，提出了一种普适环境下的服务信息导向的服务发现协议——SIGSDP。该协议基于普适环境下的服务发现协议GSD（一种适用于无线自组网的基于群组的服务发现协议）的思想，提出服务请求转发基于服务群组下的服务信息的思想，使得节点转发服务请求时能准确选择转发节点，避免不必要的转发。理论分析和仿真实验证明SIGSDP大大减少了服务请求包数量和服务响应时间，提高了服务发现效率。

英文摘要：

In consideration of the problems existing in the present service discovery protocols, this paper proposes an efficient service information guided service discovery protocol （SIGSDP） in pervasive environments. Based on the concept of the GSD, a novel group-based service discovery protoeol for mobile ad hoe networks （MANETs）, the SIGSDP presents the re- quest forwarding detailed to information to select the forwarding nodes exactly, so that the unnecessary forwardings can be avoided. The results of the theoretical analysis and the Glomosim simulation verifies that the SIGSDP can save the response time, reduce the number of service request packets, and improve the efficiency of service discovery.