JavaSpaces Based Distributed LPO Choose System

Through the LPO is the most important way of communication between users in distributed light network . If the information of communication ways is quickly acquired and the result is correctly concluded to satisfied the demand of users'application , users'regular communication and business development can be guaranteed . To draw a conclusion is not an easy thing because of various resources and complicated control in distributed light network . So the system of choice of LPOs in distributed light network has very great meaning .The system is Choose System of LPO in Distributed Light Network. The system receives information from applicants, collects LPOs from all computer distributing in the network, analyzes all information, submits satisfied LPOs to applicants.Jini and JavaSpaces are used and two choose algorithms are presents. Jini provides brief solution for distributed computing problem and JavaSpaces offers shared object store space. Two choose algorithms are tested and verified by Dijkstra. The conclusion is: algorithm 1 is more approach to Dijkstra, but time complex degree is large because of recursion algorithm; time complex degree of algorithm 2 is small, but could not always find the best Lpos depended on the choose sequence of switch lists. When network is in small scale, topo information and LPO information is not very great.Thus Dijkstra has the same efficiency with algorithm 1 and 2. Once the network scale grows to WAN, Dijkstra has less efficiency and needs more spaces or other resources than algorithm 1 and 2, because it needs generate and initiate the topo model.In addition the technologies and the situation in the network environment of the system are dicussed, such as fiber technologies , the conception of fiber networks and optical networks. The developing tendency of optical networks is analyzed as well .