Tuesday, April 6, 2010

ability of link

AODV protocol using radio a RREP HELLO cheap evening dresses
message which the TTL value is 1 to detect the existence of neighboring nodes and to verify the reach ability of link in using.It will be considered a failure if the nodes did not receive any information of neighboring nodes by certain valid link(including hello message) at particular period of time(numbers of consecutive discount wedding dresses ),in this situation,it will send wrong routing information to related nodes, in order to update the routing nodes,avoid invalid transmission and reduce the delay by generating new routing.On the lace wedding dresses basis of this mechanism,this paper expand some developments, constructing hello message with the adjacent nodes list while in the routing table cache "double jump by the node list",to record node cheap wedding gown dresses double jump of adjacent node.Thus the nodes can comprehend its distribution and routing information in the range of double jump accurately,and help to extend the cheap evening dresses range from single to double jump.Adopting this mechanism it can realize the fast restoration of the demanding routing,and enable the breaking link which caused by nodes moving to get expected custom made prom dresses repair without back to resource nodes.In this process it also can realize the active notice of short routing,providing reference for routing optimization,accelerating constringency of discount wedding dresses,and saving the delay of routing found.At last,by NS2 simulated experiment testing,expecting to achieve some improvements in data sending rate,time delay,the throughput and protocol plus size wedding dresses cost.This paper mainly focuses on these three factors:1.On the basis of overall understanding of the network and several typical MANET routing protocols,this paper gives priority to the research of AODV on-demanding routing protocols.2.According to the deficiency of AODV protocol,this paper puts wedding gowns dresses forward to the improved UH-AODV protocol and introduces the new wedding dresses key protocol mechanism of c++ code realization.3.Simulation scripts and models are finished based on thorough study on NS2.And also comparisons and analysis are made for AODV and UH_AODV respectively.
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