In wireless sensor networks data aggregation is one of the major issues. To aggregate the data a robust aggregation framework called synopsis diffusion which combines multi path routing algorithm to accurately aggregate the data in case of failures, Nodes are compromising due to the lack of physical protection. Compromised nodes are very vulnerable to attacks ...

In this paper, the authors highlight the security needed door transmission of data on a wireless network, with the technology moving forward wireless communications has grown enormously. It is necessary to provide security for wireless data transfer as it is more vulnerable to the security attacks. 70% of the online data transfer is in the ...

A compact planar monopole antenna suitable for Wireless Personal Area Network (WPAN) application is proposed. By simply modifying the periphery of a rectangular patch, effective operational band 2.95 to 16.8GHz is achieved. This band sufficiently covers the operating band, 3.1-10.6GHz, of the new Wireless Personal Area Network (WPAN) using Ultra Wide Band (UWB) technique. A ...

In this paper, the authors introduce robust adaptive beamforming algorithm using novel antenna array geometry. The proposed array geometry consists of doubly crossed Uniform Linear Arrays (ULAs) which gives high accuracy beamforming and angular resolution as compared to conventional ULA. Furthermore, use of this geometry to adaptive beamforming algorithms namely LMS, NLMS and proposed Variable ...

A Mobile Ad hoc NETwork (MANET) is infrastructure-less network where nodes communicate with each other without any centralized administration. MANETs are prone to various kinds of security attacks due to its nature as mobile and open media. Blackhole and grayhole are one of them. The impact of both attacks is most drastic. In both attacks, ...

Mobile Ad-hoc NETwork (MANET) is a continuously self-configuring infrastructure fewer networks of mobile devices connected without wires. Each device in a MANETs is free to move independently in any direction and in therefore change its link to any other devices frequently. Each must forward traffic unrelated to its own use and therefore be a router. ...

Mobile ad-hoc networks are infrastructure-less networks used for communication between two or more nodes without a common access point. It is a collection of nodes that is connected through a wireless medium forming changing topologies. In mobile ad-hoc networks all the nodes are mobile in nature and having limited battery charge. Continuous change in position ...

The mobile phone has become one of the most popular products amongst today’s consumers. Mobile applications or mobile apps are applications developed for small handheld devices, such as mobile phones, Smartphones, PDAs and so on. Mobile apps can come preloaded on the handheld device as well as can be downloaded by users from app stores ...

In this paper, the authors focuses on performance evaluation of reactive, proactive and hybrid MANET (Mobile Ad hoc NETwork) routing protocols, namely AODV, DSR, OLSR and GRP. OLSR is designed to work in a completely distributed manner and does not depend on any central entity. The AODV (Ad-hoc On demand Distance Vector) protocol consists of ...

One of important concept to design antenna is that antenna have small size. For mobile applications, one may want that antenna must have small size and must be capable to resonate at multiple frequency bands. There are number of techniques that can be useful for designing of antenna which include making use of fractal geometry, ...