Tipu Arvind Ramrekha

An Adaptive QoS Routing Solution for MANET Based Multimedia Communications in Emergency Cases

The Mobile Ad hoc Networks (MANET) is a wireless network deprived of any fixed central authoritative routing entity. It relies entirely on collaborating nodes forwarding packets from source to destination. This paper describes the design, implementation and performance evaluation of CHAMELEON, an adaptive Quality of Service (QoS) routing solution, with improved delay and jitter performances, enabling multimedia communication for MANETs in extreme emergency situations such as forest fire and terrorist attacks as defined in the PEACE project. CHAMELEON is designed to adapt its routing behaviour according to the size of a MANET. The reactive Ad Hoc on-Demand Distance Vector Routing (AODV) and proactive Optimized Link State Routing (OLSR) protocols are deemed appropriate for CHAMELEON through their performance evaluation in terms of delay and jitter for different MANET sizes in a building fire emergency scenario. CHAMELEON is then implemented in NS-2 and evaluated similarly. The paper concludes with a summary of findings so far and intended future work.

Standardisation advancements in the area of routing for mobile ad-hoc networks

Mobile Ad hoc Networks (MANETs) are self-organized and fully distributed networks that rely on the collaboration of participating devices to route data from source to destination. The MANET paradigm is expected to enable ubiquitous mobile communication and thus the proliferation of pervasive applications. The MANET Working Group (WG) of the Internet Engineering Task Force (IETF) is responsible for standardizing an appropriate Internet Protocol (IP) based routing protocol functionality for both static (mesh) and dynamic (mobile) wireless ad hoc network topologies. In this paper, we provide a background on the possibility to use MANETs for enabling future pervasive internet and innovative ubiquitous services. We also describe the work achieved by the MANET WG thus far on the area of secure unicast and multicast routing for MANETs. We also examine non-IETF work on this area, chiefly based on adaptive and hybrid routing. The paper then presents comparative performance evaluations of discussed routing protocols. It is mainly observed that there is a need for adaptive hybrid routing approaches in order to support future innovative and pervasive applications. Consequently, we present our conclusions.

Towards a scalable routing approach for Mobile Ad-hoc Networks

The Internet is evolving towards a two-fold architecture that will comprise of traditional infrastructure based networks as well as emerging self organised autonomic peripheral networks. Such Internet peripheral networks are being termed as the Internet of things (IoT) whereby smart objects and devices will be connected together in a fully distributed fashion to provide ubiquitous services through pervasive networking. Mobile Ad hoc Networks (MANETs) is regarded as one of the pervasive self-organised networks that will play a major role in autonomic future internet communication. There are several wellknown challenges to be addressed in order to enable MANET deployments of large islands of interconnected smart devices. Therefore, in this paper, we perform simulations using the ns-2 software, for various well-known routing protocols for MANETs in order to determine the scalability of these protocols. This paper analyses the scalability of the routing protocols with respect to routing overhead required by approaches while also considering the packet delivery latency, which is an important Quality of Service (QoS) metric.

Secure decentralised ubiquitous networking for emergency communications

Our modern densely populated cities have created an Achilles heel for public safety services where natural or man-made disasters often result in high casualties. The 2005 London bombings have exposed the inadequacy of current First Responder (FR) communication systems for modern response operations. Additionally, FR organisations presently pay a tariff each time Public Protection and Disaster Relief (PPDR) communication technologies are used, rendering current PPDR communication expensive as compared to emerging license-exempt IP-based technologies. Decentralised ubiquitous networking proposes an alternative way of providing innovative secure wireless systems for IP-based, infrastructure independent PPDR communications. The ad-hoc setup capabilities of ubiquitous systems will reduce the cost for emergency response whilst allowing more flexible ways of communicating. Key characteristics of such systems are their ease of deployment and the interoperability across FR teams for national as well as cross border operations. In this paper we discuss how decentralised ubiquitous networking can assist emergency communications.

Social Networks and Internet of Things, an Overview of the SITAC Project

Two of the most promising paradigms for the next decade are the Social Networks (SN) and Internet of Things (IoT). The challenge will be enabling autonomous interaction among humans and devices when these two paradigms converge. The ITEA2 SITAC project proposes to undertake the challenge of creating a unifying architecture and ‘ecosystem’ comprising platforms, tools and methodologies that enable the seamless connection and cooperation of many types of network-connected entities, whether systems, machines, devices or humans with personal devices. Beyond the state of the art challenges on big data management, management of large number of number of entities and advanced context management are specific role of the SITAC proposed unified architecture. In this scope is also described in detail a project a use case, the Intouch, which is an energy aware clustering application for social networking applications, scope of the Portuguese partnership within the project.