Shailja Agnihotri, K.R. Ramkumar
MANET, WSN, Swarm Intelligence, IoT, Routing.
|PUBLISHED DATE||June 2017|
|PUBLISHER||The Author(s) 2017. This article is published with open access at www.chitkara.edu.in/publications|
The paper provides insight into various swarm intelligence based routing protocols for Internet of Things (IoT), which are currently available for the Mobile Ad-hoc networks (MANETs) and wireless sensor networks (WSNs). There are several issues which are limiting the growth of Internet of Things. These include the reliability, link failures, routing, heterogeneity etc. The MANETs and WSNs routing issues impose almost same requirements for IoT routing mechanism. The recent work of the worldwide researchers is focused on this area. protocols are based on the principles of swarm intelligence. The swarm intelligence is applied to achieve the optimality and the efficiency in solving the complex, multi-hop and dynamic requirements of the wireless networks. The application of the ACO technique tries to provide answers to many routing issues. Using the swarm intelligence and ant colony optimization principles, it has been seen that, the protocols’ efficiency definitely increases and also provides more scope for the development of more robust, reliable and efficient routing protocols for the IoT. As the various standard protocols available for MANETs and WSNs are not reliable enough, the paper finds the need of some efficient routing algorithms for IoT.
Mobile Ad hoc Network (MANET)
The Mobile Ad hoc Network forms a temporary network with a collection of wireless moving devices without the centralized control and/or support services. In these types of networks, the devices create the dynamic topology environment wherein these can enter and exit frequently. There is no fixed infrastructure for the configuration or the reconfiguration of the network . The MANETs are mostly used in the meetings, military communications, disaster recovery situations etc. The participating nodes or the devices face the challenge of limited communication range. Every device moves on independently frequently changing its links to other devices. Each device acts as the router to forward the traffic from the source to the sink.
The multicast routing protocols are required. The various challenges faced in such networks are frequently changing topology, low bandwidth issues, less battery life etc. The protocols which offer the advantages such as high throughput, better power utilization, adaptable to dynamic topology, less number of payload delays etc. are mainly required and much in demand. These factors if fulfilled may provide the Quality of Service (QoS) [2, 43].
Wireless Sensor Network (WSN)
Wireless Sensor Network is the collection of various spatially distributed autonomous nodes forming wireless network topology, basically using the sensors and actuators to predict the surrounding environment. The environmental conditions may include temperature, pressure, sound, vibration etc.
Most of the nodes in a WSN are stationary as compared to MANETs. Also, MANET offers the distributed computing whereas WSN is for the information gathering purposes. WSNs offer centralized control with low data rate. But both are distributed wireless networks involving multi hop routing, low battery nodes and which is self-organizing in nature . The data cannot be sent directly from the source to the sink. The multi hop mesh topology requirement lays emphasis on the fact that it has to travel through the in-between sensor nodes to reach the desired destination. The protocols can be categorized in the following ways:
|ISSN||Print : 2321-3906, Online : 2321-7146|
Routing is the major challenge for the payload delivery from the source to the destination in the network [1-5]. Several significant factors are missing in case of all the existing protocols available for MANETs and WSNs. The existing protocols do not solve all reliability issues and efficient routing is not achieved still completely . As of now, no techniques or protocols are efficient enough to cover all the issues and provide the solution . There is a need to develop new protocols for the communication which will cater all these needs. The different important points to be considered are as follows:
Efficient and scalable routing protocols adaptable to different scenarios and network size variation capable to find optimal routes are required [31,32,38]. The usage of ACO principles in the routing algorithms, prove to be bright for the route optimization issues.
IoT represents the next evolution of the Internet. Given that humans advance and evolve by turning data into information, knowledge, and wisdom, IoT has the potential to change the world as we know it today—for the better . But along with the transition there are several challenges or issues which need to be resolved. Only after we overcome all the issues, such as routing and heterogeneity etc., we will be able to taste the benefits of the future technology. The existing protocols are not sufficient, need to implement more routing protocols for routing in IoT . Packet routing performance  is required to be boosted to enhance the capability of overall IoT system .
The usage of ACO principles in the routing algorithms, prove to be bright for the route optimization issues. The importance of the relatively new parameters like heterogeneity, content relevancy and analog metrics has also been analyzed. It is worth noticing that the inclusion of these parameters along with others increases the efficiency and improves the routing process. The routing protocols which are content based or analog metric based (ABRAAM, ACBRAAM or Predictive Routing algorithm) are expected to perform more efficiently and effectively.