A mobile ad-hoc network is a collection of nodes forming a dynamic wireless network without pre-existing infrastructure or centralized administration. Mobile ad-hoc network is mostly used in disaster management, military applications, vehicular communication, etc. Each node in the network acts as a router and uses a routing protocol in order to transfer data in a fully distributed way. In this paper, we focus on the routing problematic in mobile ad-hoc networks and we contribute by proposing DS2R2P (onDemand Source Routing with Reduced Packets Protocol). Our proposal is based on source routing when the source node embeds the route information in the data packet allowing to drive intermediate nodes in order to reach the intended destination. Unlike existing solutions, the header of data packet includes only a reduced integer value instead of the complete sequence of intermediate node addresses. This value is considered as the summary of the routing path and includes a complete information allowing the data packet to reach the destination. We have evaluated the performances of our solution through simulations in which our protocol provides effective results in terms of data routing delay and communication overhead.

Wireless sensor networks consist of a set of connected devices deployed to report sensitive environmental data. Key management in wireless sensor networks remains a challenging issue due to the limited resource capacity of devices. Most existing solutions focus only on the key storage and updating optimization giving less attention to the mobility, which is more needed in the nowadays applications. In this paper, we propose a secure and efficient key management system with mobility support. The proposed scheme is based on hybrid key establishment to meet both the robustness and efficiency requirements. The sensor nodes can be mobile, where they could leave, rejoin their cluster, or join other ones. We incorporate lightweight techniques for sensor node integration, departure, revocation and key updating. Its efficiency is evaluated by comparison with other concurrent schemes, where it demonstrates the best results.

Mobile Wireless Sensor Network (MWSN) is a set of interconnected mobile sensor devices forming a dynamic network without a fixed administration. MWSN is used in various domains, such as disaster detection, medical systems, military applications, vehicular communications, and in other sensitive applications. Compared to the classical sensor networks, MWSNs involve an additional constraint consisting of the topology change frequency caused by the mobility of sensor devices. This influences highly the energy consumption and consequently the network reliability. In this paper, we take in charge this important issue and we contribute by the proposition of an efficient and energy-aware routing protocol. The proposed protocol operates for both request and event oriented MWSN applications. It introduces the sensor device mobility history in order to build-up stable routing paths, and incorporates a novel technique of dissimulation in order to exchange the mobility control messages without overhead. We have evaluated the performances of the proposed protocol through simulations, in which it provides effective results in terms of energy consumption and load-balancing.

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