| Low-rate Wireless Personal Area Network is a low bit rate, low power, and lowcost local interconnecting technology for which nodes communicate with each otherand exchange information within a radius of10meters of personal operation space.Chartered with easy installation, short-distance communication, extremely low powerconsumption and simple and flexible protocol，it can be widely used in smart home,industrial control and other fields. Integrating LR-WPAN with IPv6, can not only toprovide unique device addresses and address auto-configuration capabilities to hugenumbers of nodes, but also to interconnect LR-WPAN and IPv6networks and achievethe goal of remote access and control, which will be the main direction of the futurewireless networks at low speed.IETF6LoWPAN workgroup was founded to study the application of IPv6protocol over LR-WPAN, but the proposed draft about routing protocol is not perfect,related standards are still in the research and discussion. In this paper, the Ad hocnetwork routing protocol AODV was studied, according to the idea of the multipathrouting, an improved routing protocol named MP-LOAD was proposed on the basisof6LoWPAN LOAD protocol, which adding alternate routing mechanism andmodifying the link repair process, to decrease the times of restarted routing discoveryand reduce routing overhead.MP-LOAD routing protocol and network simulation environment was designedand coded, experiments had be done to make comparisons with other routingprotocols. The results show that the MP-LOAD protocol has better effect innormalized routing overhead, route discovery frequency, packet delivery fraction andaverage end to end delay, which is of great significance to the development of6lowpan routing protocol. |
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