International Journal of Sensors Wireless Communications and Control - Volume 3, Issue 1, 2013

In this paper, the asymptotical stability of stochastic genetic regulatory networks with time-varying delays and continuous distributed delays are investigated. The constraint that derivative of time-varying delays must be smaller than 1 is relaxed, and the activation functions are of more general descriptions, which generalize and improve the earlier methods. Based on the Lyapunov-Krasovskii functional approach and linear matrix inequality (LMI) techniques defined on convex set, stability criteria for stochastic delayed genetic regulatory networks are established in the form of LMIs, which can be easily verified. Numerical example is also given to demonstrate the effectiveness of the proposed criteria.

The present work proposes a communication system to ensure Internet connectivity and network transparency to a group of nodes within a vehicle in heterogeneous wireless networks environment. It considers the integration of three networks. Each vehicle is equipped with multiple cares of addresses corresponding to multiple network interfaces. The proposed scheme provides uninterrupted Internet connectivity to the nodes inside a vehicle while the vehicle moves. It allows communication among a correspondent node and a node inside a vehicle using a suitable care of address for balancing the load among the various wireless access networks. Each network reserves a fraction of the total resource for the processing of handoff session request and new session request depending upon their arrival probability. It entertains a session request only if the desired resource is available which helps to maintain the user satisfaction of the already admitted users in the network to a satisfactory level.

Wireless Sensor Networks (WSNs) are being increasingly deployed in military, health care, health monitoring, environmental and several other applications. However, design and deployment of WSNs have several challenges. In this paper, we present the challenges in deploying WSNs for different applications. The challenges in the design of communication infrastructure have also been discussed. Effects of using mobile base stations have been discussed for improving the lifetime of the network.

There has been massive research and development done during the last decade in the field of Wireless Sensor Networks (WSNs). In this direction, many routing techniques have been proposed which are classified with respect to the protocol’s performance, operation and network types. In the early days, security issues were not kept in mind while designing routing protocols. WSNs applications consist of critical infrastructures like military and healthcare, and may be exposed to serious security threats. The availability of resources is a focus for such infrastructures which support a secure, resilient and reliable environment. In this survey, we focus on the discussion of achieving secure routing in wireless sensor networks. For this purpose, we study and analyze different routing protocols, their limitations and some possible solutions proposed by researchers.

This paper investigates an asynchronous H∞ control strategy for a class of discrete-time Markovian jump linear system (MJLS) subject to hard time domain constraints. The word “asynchronous” means that the switching of candidate controllers has a lag to the jump of system modes. First, new results on the mean square stability and H∞ performance analysis for MJLS are given with average dwell time (ADT) bound by allowing the stochastic Lyapunov-like function (LLF) to increase during the running time of each active mode. The internal relationship between ADT and transition probabilities (TPs) is revealed by fully making use of the jump knowledge. Then, the asynchronous H∞ controller for MJLS subject to input/output constraints is designed with the aid of a set of stochastic invariant ellipsoids. Moreover, the domain of the admissible set is enlarged by constructing a set of polyhedral invariant sets on-line with the designed controller. Finally, numerical examples are given to verify the potential of the developed results.

The major problem for wireless sensor networks (WSN) is the limited energy supply so that we can save energy for future purpose. Most common techniques for prolonging the life time of the network is Routing algorithms etc. In this paper a multi-layer MAC (ML-MAC) concept is suggested for energy efficient Grid ML-MAC Wireless Sensor Network (WSN). In Grid Topology sensors are placed manually in an array configuration. Another topology we can place it in is hexagonal lattice. The efficiency of the proposed multi-layer MAC is validated using QualNet 6.1. Additionally we also analyze the performance of various parameters like Residual Battery Capacity (mAhr), Average End-to-End Delay (sec.), Throughput (bits/sec.), and Jitter (s) is evaluated over IEEE 802.15.4 AODV (Ad-hoc on demand distance Vector Routing Protocol) by applying Grid Topology using ML-MAC concept. The simulation results demonstrate that our solution significantly improves the overall network lifetime.