Node Mobility Support Between Multi-hop 6LoWPAN Networks Based on Proxy Mobile IPv6

摘要

The Internet of Things (IoT) has seen rapidly advancing as it is emerging as next technology revolution. IPv6 over Low-power Wireless Personal Area Networks (6LoWPAN) plays a main communication interface in IoT since it is able to bridge the lightweight underlying IEEE 802.15.4 protocols and IPv6. Proxy MIPv6 (PMIPv6) is a network-based localized mobility management which ideal for 6LoWPAN network because the mobile node in the PMIPv6 domain is not involved with IP mobility signalling. However, PMIPv6 is restricted to communicate in single hop network. It is impractical for 6LoWPAN network which is composed of low-power sensor nodes that have limited transmission power. In this paper, a new mobility support mechanism named the Sensor Prefix-Mapping Scheme (SP-MS) is proposed in the context of providing efficient node mobility support. The experiment is carried out by deploying two constrained 6LoWPAN networks with Contiki Operating System and a PMIPv6 backhaul network with OpenAirInterface Proxy Mobile IPv6. The results proved the efficiency of proposed SP-MS; the 0.79 % round-trip delay increment with increasing number of hops when all nodes are sending packets simultaneously is considered insignificant. Besides, the handoff components are optimized to outperform the previous MIPv6 implementation (Roth et al. in Proceedings of the 9th ACM symposium on performance evaluation of wireless ad hoc, sensor, and ubiquitous networks, pp. 77-84, 2012) in term of inter-network handoff delay in one hop scenario. These findings suggest the efficiency of proposed SP-MS to support node mobility between multi-hop 6LoWPAN networks based on PMIPv6.