![]() ![]() Low-power and Lossy Networks (LLNs) are composed of Constrained Devices, i.e., devices with strictly limited computational power and storage (1-2 MHz CPUs and a couple of KB of memory), which are communicating over a channel characterised by a high probability of packet losses, typically very small frame sizes, and very limited throughput. A general framework is also proposed to secure the routing protocol. All those extensions are examined from the aspects of specification, interoperability with other mechanisms, security vulnerabilities, performance and applicability. This paper studies several such additional components for extending LOADng: support for smart route requests and expanding ring search, an extension permitting maintaining collection trees, a fast rerouting extension. Designed with a modular approach, LOADng can be extended with additional components for adapting the protocol to different topologies, traffic, and data-link layer characteristics. As a reactive protocol, it does not maintain a routing table for all destinations in the network, but initiates a route discovery to a destination only when there is data to be sent to that destination to reduce routing overhead and memory consumption. ![]() This paper studies the routing protocol “Lightweight On-demand Ad hoc Distance-vector Routing Protocol – Next Generation (LOADng)”, designed to enable efficient, scalable and secure routing in low power and lossy networks.
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