International Journal of Computer and Applications

This document provides updates to IEEE Std 802.16's MIB for the MAC, PHY and asso- ciated management procedures in order to accommodate recent extensions to the standard.

IEEE Standard for Local and Metropolitan Area Networks Part 16: Air Interface for Fixed Broadband Wireless Access Systems Draft Amendment: Management Information Base Extensions

Advances in wireless communication technologies, such as wearable and implantable biosensors, along with recent developments in the embedded computing area are enabling the design, development, and implementation of body area networks. This class of networks is paving the way for the deployment of innovative healthcare monitoring applications. In the past few years, much of the research in the area of body area networks has focused on issues related to wireless sensor designs, sensor miniaturization, low-power sensor circuitry, signal processing, and communications protocols. In this paper, we present an overview of body area networks, and a discussion of BAN communications types and their related issues. We provide a detailed investigation of sensor devices, physical layer, data link layer, and radio technology aspects of BAN research. We also present a taxonomy of BAN projects that have been introduced/proposed to date. Finally, we highlight some of the design challenges and open issues that still need to be addressed to make BANs truly ubiquitous for a wide range of applications.

Body Area Networks: A Survey

The problem of idle listening is one of the most significant sources of energy consumption in wireless sensor nodes, and many techniques have been proposed based on duty cycling to reduce this cost. In this paper, we present a new asynchronous duty cycle MAC protocol, called Receiver-Initiated MAC (RI-MAC), that uses receiver-initiated data transmission in order to efficiently and effectively operate over a wide range of traffic loads. RI-MAC attempts to minimize the time a sender and its intended receiver occupy the wireless medium to find a rendezvous time for exchanging data, while still decoupling the sender and receiver's duty cycle schedules. We show the performance of RI-MAC through detailed ns-2 simulation and through measurements of an implementation in TinyOS in a testbed of MICAz motes. Compared to the prior asynchronous duty cycling approach of X-MAC, RI-MAC achieves higher throughput, packet delivery ratio, and power efficiency under a wide range of traffic loads. Especially when there are contending flows, such as bursty traffic or transmissions from hidden nodes, RI-MAC significantly improves throughput and packet delivery ratio. Even under light traffic load for which X-MAC is optimized, RI-MAC achieves the same high performance in terms of packet delivery ratio and latency while maintaining comparable power efficiency.

/pdf/ri-mac-a-receiver-initiated-asynchronous-duty-cycle-mac-4rb0jcbw11.pdf

RI-MAC: a receiver-initiated asynchronous duty cycle MAC protocol for dynamic traffic loads in wireless sensor networks

http://www.inf.ufes.br/~zegonc/material/Redes%20de%20Sensores%20sem%20Fio/MAC%20in%20WSN.pdf

Medium access control in wireless sensor networks

Ultra wideband (UWB) wireless systems are highly susceptible to interference from other services. In this article we propose a novel wavelet packet based approach to address the issue of interference mitigation from wideband co-existing services such as the WLAN standard IEEE 802.11a on UWB communication. By representing the UWB transmission waveform as wavelet packet coefficients and by selectively removing those coefficients whose spectral footprint lie in or close to the interference zones, the effect of interference on the UWB system is mitigated. Special emphasis is given to the design of maximally frequency selective filter banks derived from a modified Remez exchange algorithm. The proposed interference mitigation is shown to be effective with a much improved bit error rate (BER) performance.

Mitigation of interference from wideband IEEE 802.11a source on UWB wireless communication using frequency selective wavelet packets

In this paper, a single macrocell three‐tier network with Macrocell Base Station (MBS), Femtocell Base Station (FBS) and Device‐to‐Device (D2D) pair is considered which shares the uplink resource block. In this work, we consider a three‐tier network with additional constraint to limit the number of users and optimize the power. Non‐Cooperative Game (NCG) theory is considered to optimize the EE of D2D users, which achieves Nash Equilibrium (NE) and Pareto Optimality (PO).

Energy‐efficient resource allocation for device‐to‐device communication through noncooperative game theory

Device-to-device (D2D) communication brings many advantages in underlay cellular networks such as improving spectrum efficiency, energy efficiency and cellular capacity. However, D2D transmission creates interference to the cellular user equipment (CUEs) and other D2D pairs. So, proper resource allocation handling is required to suppress the interference introduced by the addition of D2D user equipment (DUEs) in the existing cellular networks. In this paper, Distance Based Interference Mitigation (DBIM) algorithm is proposed to mitigate interference where the locations of user equipment (UEs) and evolved NodeB (eNB) are identified and distances between them are estimated using Haversine Formula. In this work resources are allocated to UEs based on distance constraints. Further, the significance of D2D communication and simulations to justify the proposed scheme is also presented.

Distance based uplink resource sharing for device-to-device communication

Spectrum Sensing is important in Cognitive Radio (CR). Accuracy and speed of estimation are keys to select appropriate spectrum sensing technique. Conventional spectrum estimation techniques based on Short Time Fourier Transform suffer from familiar problems such as low frequency resolution, large variance of estimated power and large side lobes. In this article, the possibility of employing wavelet packet decomposition for new spectrum sensing is investigated. In order to investigate the performance of the proposed approach, four types of sources (transmitters) are used, namely partial band, single tone, multi tone and swept tone. To simulate the temporal dynamics in CR, a special kind of source called swept tone source is devised. The novelty of this work relates to the development of wavelet packet decomposition using filter bank approach as a new spectrum sensing tool recommended for CR. The results of this study show that the wavelet based spectral estimation is a promising technique for CR applications.

http://ieeexplore.ieee.org/iel5/5286915/5290832/05290958.pdf

A study on application of wavelets and filter banks for Cognitive Radio spectrum estimation

This paper provides a general framework of Networked Control Systems. An Internet based NCS is simulated and TCP/IP communication issue of data streams in Networked Control Systems (NCS) is evaluated. The network is simulated with the ns-2 package, a widespread state-of-the-art open-source network simulator package for studying packet dynamics in networks. The ns-2 release is extended in order to simulate the transmissions of plants and controllers that are modelled by ODEs (solved via a linked package).The results show the overall control and network performances achieved while modelling the individual control and network components. The performance results of different types of data streams in NCS are also presented. Stability issues of NCS are being explored.

/pdf/implementation-of-networked-control-systems-using-tcp-ip-411bssy7gt.pdf

M. K. Lakshmanan

Papers

Mitigation of interference from wideband IEEE 802.11a source on UWB wireless communication using frequency selective wavelet packets

Energy‐efficient resource allocation for device‐to‐device communication through noncooperative game theory

Distance based uplink resource sharing for device-to-device communication

A study on application of wavelets and filter banks for Cognitive Radio spectrum estimation

Implementation of Networked Control Systems using TCP/IP