A neighbor discovery algorithm for full duplex Ad Hoc networks with directional antennas

We consider the problem of neighbor discovery in ad hoc network which is full duplex and uses directional antennas. Directional transmission is prerequisite for some ad hoc networking applications and makes the neighbor discovery less efficient than omni-directional broadcast. Full duplex enables simultaneous transmission and reception and facilitates the directional neighbor discovery.

We present a simple one way handshaking algorithm and feasible decision rules for terminating the neighbor discovery procedure. The effect of transmission error and the collision on the algorithm is also considered. At the same time, the performance of the algorithm is analyzed. Lastly, simulations are given to show the effectiveness and efficiency of the algorithm.

Receiver Cooperation in Topology Control for Wireless Ad-Hoc Networks

We propose employing receiver cooperation in centralized topology control to improve energy efficiency as well as network connectivity. The idea of transmitter cooperation has been widely considered in topology control to improve network connectivity or energy efficiency. However, receiver cooperation has not previously been considered in topology control. In particular, we show that we can improve both connectivity and energy efficiency if we employ receiver cooperation in addition to transmitter cooperation.

Consequently, we conclude that a system based both on transmitter and receiver cooperation is generally superior to one based only on transmitter cooperation. We also show that the increase in network connectivity caused by employing transmitter cooperation in addition to receiver cooperation is at the expense of significantly increased energy consumption. Consequently, system designers may opt for receiver-only cooperation in cases for which energy efficiency is of the highest priority or when connectivity increase is no longer a serious concern.

Partial multipath routing for mobile ad-hoc networks

In a mobile ad-hoc network, to establish a stable routing path is one of the important technical issues to transmit data from source to destination by multi-hop transmission. Mobile ad-hoc network has time varying channels, and traffic congestion or unstable link condition can be severe problems. To solve those problems, multi-path routing protocols were proposed.

Conventional multi-path routing, however, requires much more nodes and power consumption. In this paper, we propose partial multi-path routing with interference avoidance. The proposed routing does not establish another full routing path but establish a partial multi-path to complement some poor links, and the routing paths have enough distance from each other to reduce path interference.

Link breakage time based QoS improvement in mobile ad hoc network

Route establishment between source and destination is a difficult process in mobile ad hoc network. Many approaches have been developed to find a route from source to destination without considering the stability of the nodes and its link life time. It affects the QoS parameters such as throughput, packet loss, delay, packet delivery ratio. So, in this proposed work a link breakage prediction algorithm is added to the AODV protocol.

By using signal strengths from the received packets the link breakage time is predicted and sends a warning message to the source node of active route if the link is soon to be broken. Also the next optimal route to the destination node will be elected before the breakage of any actual route’s link.

Impact of baseline profile on intrusion detection in mobile ad hoc networks

Dynamic topology and limited resources are major limitations that make intrusion detection in mobile adhoc network (MANET) a difficult task. In recent years, several anomaly detection techniques were proposed to detect malicious nodes using static and dynamic baseline profiles, which depict normal MANET behaviors.

In this research, we investigated different baseline profile methods and conducted a set of experiments to evaluate their effectiveness and efficiency for anomaly detection in MANETs using C-means clustering technique. The results indicated that a static baseline profile delivers similar results to other baseline profile methods. However, it requires the least resource usage while a dynamic baseline profile method requires the most resource usage of all the baseline models.