提出了一種新的用轉(zhuǎn)發(fā)服務(wù)請(qǐng)求方法實(shí)現(xiàn)面向廣域網(wǎng)的服務(wù)發(fā)現(xiàn)機(jī)制RFSD。分布在廣域網(wǎng)中的服務(wù)器結(jié)點(diǎn)組成一個(gè)樹(shù)結(jié)構(gòu)，每個(gè)結(jié)點(diǎn)保存其父、兄弟和子等相鄰結(jié)點(diǎn)的地址；服務(wù)請(qǐng)求傳輸報(bào)文中附加一定的轉(zhuǎn)發(fā)信息。每個(gè)結(jié)點(diǎn)收到服務(wù)請(qǐng)求時(shí)，首先對(duì)其進(jìn)行匹配操作，在滿足的情況下響應(yīng)服務(wù)請(qǐng)求，在不滿足的情況下對(duì)附加信息進(jìn)行處理，并將服務(wù)請(qǐng)求轉(zhuǎn)發(fā)到某個(gè)相鄰結(jié)點(diǎn)，這種方法可以有效地實(shí)現(xiàn)廣域網(wǎng)中的服務(wù)發(fā)現(xiàn)。
關(guān) 鍵 詞 服務(wù)發(fā)現(xiàn); 廣域網(wǎng); 樹(shù)結(jié)構(gòu); 附加信息; 請(qǐng)求轉(zhuǎn)發(fā)

Abstract A wide area network oriented service discovery mechanism is described in this paper. Discovery servers in wide area networks are organized into a tree structure with each server node saves the address of its neighbor nodes, namely its father, brothers and children in the tree. The transmission message of service request is appended certain forwarding information. By matching the received service requests with service repository, each node response the service request or deals with the appended information in it and forward it to one of neighbor nodes. Thus, service discovery in wide area networks can be achieved effectively.
Key words service discovery; wide area network; tree structure; appended information; request forward