Efficient IPv6Packet Transmission Techniques For Low Power Wireless Personal Area Networks

With the advances in the applications of Internet of Things, IEEE802.15.4standard based Wireless Personal Area Network (WPAN) has been widely used. In order to take full advantage of the sufficient resources in the IP network, it becomes more and more urgent to interconnect WPAN with the IP network. To meet this demand, the Internet Engineering Task Force (IETF) has established a working group named6LoWPAN, which is the acronym of IPv6over Low-power Wireless Personal Area Network, to implement the techniques that transmit IPv6packet over WPAN based on IEEE802.15.4standard.This paper studies a kind of efficient IPv6packet transmission technique for Low-power Wireless Personal Area network (LoWPAN). First, we analyze the IPv6protocol and IEEE802.15.4standard related to6LoWPAN in brief. Second, we analyze the function of the adaptation layer in the6LoWPAN protocol, which includes IP packet’s header compression, IP packet’s fragmentation and reassembling, and IP packet’s multi-hop transmission. At last, we propose the chained Mesh-Under routing (C-MUR) strategy, which deals with IP packet’s fragmentation and reassemble in6LoWPAN network. The main idea of the C-MUR is to find the optimal Temporary Assembling Nodes (TANs) that reside between the source node and the destination node through an optimization model. After the TANs are found, the source node divides the packet into several fragments and sends them to a TAN. When all fragments arrive at the TAN, they are reassembled into the original IPv6packet, which is divided again by the TAN into several fragments to be sent to the neighboring TAN. This process repeats until the IPv6packet arrives at the destination node.In this paper, we use TinyOS system and nesC language to implement the C-MUR strategy on TelosB motes. In addition, we conduct some experiments to analyze the packet arrival rate and delay under the C-MUR strategy. Furthermore, we compare the C-MUR strategy with other existing routing strategies. The experiment results show that the proposed C-MUR can improve the packet arrival rate effectively with a delay constraint.