Internet of things II

6LowPan-> 6LoWPAN combines IPv6 protocol over the Low-power wireless Area Network.  Its benefits are open, long-lived, reliable standards, easy learning-curve, transparent Internet integration, network maintainability, global scalability and end-to-end data flows. It is used for facility, Building and Home Automation, Personal Sports & Entertainment, Security and Safety and Industrial Automation among others.

6LoWPAN is characterized by Stateless header compression, enable a standard socket API, minimal use of code and memory, direct end-to-end Internet integration and multiple topology options. It also allows an efficient UDP header compression, a network autoconfiguration using neighbour discovery and Unicast, multicast and broadcast support.

His protocol stack has 5 levels, from physical level to application level. It is very useful with low-power link layers such as IEEE 802.15.4, narrowband ISM and power-line communications.

LoWPANs are stub networks. We find three types of different LoWPANS: simple, extended and Ad-hoc. Nowadays, we find some problems when we want to integrate this technology, like the maximum transmission unit, the security or the application protocols.

RPL-> RPL is the routing protocol for Smart Objects Network. With Low Power and Lossy Networks there is strong interest in using several Objetive Functions because deployments greatly vary with different objectives and a single network may support traffic with very different requirements in terms of path quality. We specify how to build a destination oriented directed acyclic graph (DODAG) and there are specified by an objective function.

In contrast with tree topologies, DODAGs offer redundant paths. Thus if the topology permits, there is always more than one path between a leaf and the DODAG root and divide traffic to different paths optimized according to the requirements.

RFC 4443 defines the RPL Control Messages, consisting of an ICMPv6 header followed by a message body. There are 4 types: DIO (DODAG Information Object), DIS (DODAG Information Solicitation), DAO (Destination Advertisement Object) and Secure variants of every type of message.

ISA100->Standard effort from the Instrumentation, Systems, and Automation Society (ISA). ISA100 is a group that standardizes wireless systems for automation.