On The Research Of Label Switch-Based Mobile Ad-Hoc Network Based Multi-Path

Ad-hoc network composed of mobile nodes with wireless communication device are typically characterized by their multi-hop, temporary and un-center. MPLS (Multiprotocol Label Switching) is a new network technology using label to induct data fast transfer and switching on a open telecommunication network. Import MPLS into Ad-hoc network means combining switching of MPLS datalink layer and routing of Ad-hoc network layer, provide connection-oriented switching based on IP routing protocol. Doing this can improve the deficiency of the Ad-hoc, provide huge advantage in fast switching, traffic engineering, Qos and virtual VPN.Firstly, this paper introduces the concept and characteristic of Ad-hoc networks and MPLS. Then introduces architecture and algorithm of label switch-based mobile Ad-hoc network based Multi-path, promote a network label switching protocol AODLS(Ad-hoc On-demand Label Switching), also simulate the performance of this protocol in OPNET network simulator.This paper puts forward a new protocol in Ad-hoc network which based on multi-path label switching. This protocol based on TRND-AODV multi-path protocol, import label switching of MPLS, realize the separation of routing and forwarding in Ad-hoc network. Realizing label switching in Ad-hoc network also provides two advantages. First, using a fix and short label replaces traditional longest packet matching, can obtain better forwarding performance, make the process of forwarding easier, even can implement by hardware. Second, separate routing and forwarding. For example, the same forwarding algorithm can support unicast and multicast, different routing function lie on the organization of output label. So we do not need change forwarding mechanism when add a new routing or control function. This paper implements AODLS protocol in OPNET and compares its performance with AODV. The result shows that AODLS decreases the end-to-end delay, increases the packet delivery, decreases the routing cost and increases the QoS of network. Finally the conclusions of this paper and suggestions for future research of the field are given.This paper is supported by National Natural Science Foundation of China (60372101).