Abstract
Low-power Wireless Personal Area Networks (LoWPANs) comprise devices that conform to the IEEE standard 802.15.4. These networks need to be connected with other wireless and wired networks in order to maximize the utilization of information and other resources which are mainly associated with the Internet Protocol (IP)-based networks. The transmission of IPv6 over Low Power Wireless Personal Area Networks (6LoWPANs), requires a fragmentation and reassembly layer that also carries out header compression for transmission efficiency. The existing proposed header format includes the originatorâs address in adaptation layer, to ensure along with other issues, that in case of a link failure, route error messages are delivered back to the originator. We propose the Unicast Back-Propagation Mechanism (UBP) that delivers the Route Error Message (RERR) to the source even without having the originatorâs address in 6LoWPAN adaptation layer packet format. We make use of MAC layer address for sending the RERR to the previous hop node, back tracking the route hop by hop, eventually to the source. The simulation results show that our solution provides considerable header compression yet shows better diagnostic performance as the RERR delivery mechanism in standard ad-hoc routing.
Highlights
Low-power wireless personal area networks (LoWPANs) comprise devices that conform to the IEEE 802.15.4-2003 standard (IEEE LoWPAN, 2003)
The LoWPANs need to be connected with other wireless and wired networks in order to maximize the utilization of information and other resources which are mainly associated with the Internet Protocol (IP)-based networks
First we describe our simulation results, showing the comparison of Unicast Back-Propagation Mechanism (UBP), Ad-hoc On-Demand Distance Vector (AODV) and under the case when no provision is provided for Route Error (RERR) delivery
Summary
Low-power wireless personal area networks (LoWPANs) comprise devices that conform to the IEEE 802.15.4-2003 standard (IEEE LoWPAN, 2003). A LoWPAN typically includes devices that work together to connect the physical environment to real-world applications, e.g., wireless sensors. These networks consist of large number of sensor nodes, densely deployed in a specific region of interest. The Maximum Transmission Unit (MTU) for IPv6 is at least 1280 octets, which cannot be mapped directly onto IEEE 802.15.4 physical layer frame, which is 127 octets-that further includes the 25 octets Media Access Layer (MAC) header. UDP uses 8 bytes header that would leave only 33 octets for application data. This situation demands for an adaptation layer, for fragmentation and reassembly, below IP layer.
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