i-manager's Journal on Wireless Communication Networks (JWCN)


Volume 1 Issue 1 April - June 2012

Article

MANET: An Essential Technology for Future Wireless Networks

Pritibha Sukhroop* , Paramvir Singh**, Nishesh Goyal***
* Assistant Professor, J.P.I.E.T Meerut.
** CEO, Gurgev Engineers, Meerut.
*** Lecturer, GTBKIET, Malout.
Sukhroop, P., Singh, P., and Goyal, N. (2012). MANET: An Essential Technology for Future Wireless Networks, i-manager’s Journal on Wireless Communication Networks. 1(1), 1-7. https://doi.org/10.26634/jwcn.1.1.1851

Abstract

Wireless network has become increasingly popular in the past few decades, particularly within the 1990’s when they are being adapted to enable mobility and wireless devices become popular. In the near future, a pervasive computing environment can be expected based on the recent progresses and advances in computing and communication technologies. Next generation of mobile communications will include both prestigious infrastructured wireless networks and novel infrastructure less mobile ad hoc networks (MANETs). A MANET is a collection of wireless nodes that can dynamically form a network to exchange information without using any pre-existing fixed network infrastructure. This paper describes the fundamental problems of ad hoc networking by giving it related research background including the concept, features, and its applications in future wireless network especially in the hostile military environment. By combining two hottest wireless network topics, 4G (the fourth generation of cellular communication systems) and MANET, we explore potentials as well as foreseeable challenges to the wireless communications in the future battlefield. Special attention is paid on network layer routing strategy of MANET and key research issues include new X-cast routing algorithms, security & reliability schemes, QoS model, and mechanisms for interworking with outside IP networks.

Article

Wireless Communication Technologies for Electrical Power System Applications

M. S. Sujatha* , Vijaya Kumar**
* Department of EEE, Sree Vidyanikethan Engineering College, Tirupati.
** Professor, Department of EEE, JNTUA, Anantapur.
Sujatha, M.S., and Kumar, M.V. (2012). Wireless Communication Technologies for Electrical Power System Applications, i-manager’s Journal on Wireless Communication Networks. 1(1), 8-18. https://doi.org/10.26634/jwcn.1.1.1852

Abstract

Two-way and robust communication is the key aspect of   realizing   the   vision   of   power system protection. There are   several standardized wired and wireless communication echnologies available for various power system applications. Wireless technologies have    significant benefits over wired, such has improved protection, control, speed outage restoration, operation analysis, maintenance, planning and also have low installation and maintenance cost, rapid deployment, mobility, etc. Several activities are going on in many areas of power system using this technology.  This paper presents various power system applications achieved through standardized wireless communication technologies, e.g.  IEEE  802.11  based  wireless LAN, IEEE 802.16 based WiMAX, 3G/4G cellular, ZigBee based on IEEE 802.15,  IEEE 802.20 based MobileFi, Blue tooth-IEEE802.15.1 etc. The challenges related to wire and wireless communication technologies have been discussed in brief. Addition to this, advantages of cellular communication is discussed.

Research Paper

Efficient Channel Estimation for MIMO-OFDM Systems With Joint Carrier Frequency Offset using UKF

M. Jeya Prabha*
Lecturer, Department of Electronics and Communication Engg., Lord Jegannath College of Engineering and Tech., India.
Prabha, M.J. (2012). Efficient Channel Estimation For MIMO-OFDM Systems With Joint Carrier Frequency Offset Using UKF,i-manager’s Journal on Wireless Communication Networks. 1(1), 19-24. https://doi.org/10.26634/jwcn.1.1.1853

Abstract

MIMO antennas with orthogonal frequency-division multiplexing (OFDM) provide high data rates and are robust to multipath delay in wireless communications. In this paper, we propose a complete algorithm capable of jointly estimating the CFO and the path CA by taking into account the fast variation of each path CA in a MIMO environment. In olden approach, an algorithm based on extended Kalman ?ltering (EKF) and the equivalent discrete-time channel model, but the fast time variation of the channel was not taken into account. The extended Kalman filter in general is not an optimal estimator (of course it is optimal if the measurement and the state transition model are both linear, as in that case the extended Kalman filter is identical to the regular one). In addition, if the initial estimate of the state is wrong, or if the process is modeled incorrectly, the filter may quickly diverge, owing to its linearization. An improvement to the extended Kalman filter led to the development of the Unscented Kalman filter (UKF), also a nonlinear filter. In the UKF, the probability density is approximated by the nonlinear transformation of a random variable, which returns much more accurate results than the first-order Taylor expansion of the nonlinear functions in the EKF. The approximation utilizes a set of sample points, which guarantees accuracy with the posterior mean and covariance to the second order for any nonlinearity. The UKF tends to be more robust and more accurate than the EKF in its estimation of error.

Research Paper

Implementation of Adaptive Event based Packet Scheduler for RREQ Mechanism in MANET

S. Lakshmi* , S. Radha**
* Research Scholar, Sathyabama University, Tamilnadu, Chennai.
** Professor & Head, SSN College of Engineering, Tamilnadu, Chennai.
Lakshmi, S., and Radha, S. (2012). Implementation of Adaptive Event Based Packet Scheduler for RREQ Mechanism in MANET, i-manager’s Journal on Wireless Communication Networks. 1(1), 25-30. https://doi.org/10.26634/jwcn.1.1.1854

Abstract

The adaptive event based packet scheduler for ad-hoc on demand distance vector protocol (AEBPS) method support among the buffer manager and scheduler for each and every node in order that event node packets can be distinguished from the non event node packets. Because of the presence of flooding attack might corrupt the performance by utilizing the useful resources which result in congestion in the network. In MANET if AEBPS is adapted this provides most favorable solution for all the nodes which are affected by RREQ flooding mechanism. The AEBPS may vividly induce a reactive solution that could manage the queues where the packets are stored before scheduling. The simulation of this model was run using ns-2.26 which was compared   with adaptive buffer scheduler, the results compromise that AEBPS increases packet delivery ratio but decreases control overhead and total overhead.

Research Paper

Performance Analysis of Fixed and Mobile WiMAX

Md.Tarek Uz Zaman* , Md. Abul Basher**, Md. Habibul Hasan Bhuiyan***, Md. Taslim Arefin****
*-**-*** B.Sc Students, Dept. of Electronics & Telecom. Engg., Faculty of Science & IT, Daffodil International University, Bangladesh.
**** Assistant Professor in the Dept. of Electronics and Telecom. Engg., Daffodil International University, Bangladesh.
Tarek - Uz- Zaman, Basher, A., Bhuiyan, H.H., and Arefin, T. (2012). Performance Analysis of Fixed and Mobile WiMAX, i-manager’s Journal on Wireless Communication Networks. 1(1), 31-40. https://doi.org/10.26634/jwcn.1.1.1855

Abstract

WiMAX which represents World Interoperability for Microwave Access is a major part of broadband wireless network having IEEE 802.16 standard provides innovative fixed as well as mobile platform for broadband internet access anywhere in anytime. This project report provides the detail about the two main applications of WiMAX which are fixed WiMAX and Mobile WiMAX. Fixed WiMAX 802.16 delivers point to multipoint broadband wireless access to our homes and offices. Whereas Mobile WiMAX gives full mobility of cellular networks at higher broadband speeds than other broadband networks like Wi-Fi. Both applications of WiMAX are designed in a proper network planning which is helpful to offer better throughput broadband wireless connectivity at a much lower cost.