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Mobility of sensor node in Wireless Sensor Network (WSN) is one of the key advantages of wireless over fixed communication system. But to track the sensor node in the heterogeneous network is more challenging and difficulties. In heterogeneous system, generally power consumption is more then homogeneous system. Coordination in distributed sensor network the implementation of clustering is an important...
Wireless Access Networks, such as Wi-Fi, have been widely deployed due to their convenience, portability, and low cost. However, they still suffer inherent shortcomings such as limited radio coverage, poor system reliability, and lack of security and privacy. Privacy threat is one of the critical issues in Multi hop Wireless Networks, where attacks such as traffic analysis and flow tracing can be...
This paper will describe the signal processing and channel enhancement using MIMO technology In order to have flexibility in transmission system, wireless systems are always considered better as compared to wired channel. Having known the drawbacks of the Single Input Single Output system, and having computed the advantages of Multiple Input Multiple Out, several techniques have been developed to...
Mobile ad-hoc network is a wireless infrastructure network where there is no central co-ordination among the nodes. The nodes try to communicate with each other without any fixed networking infrastructure, thus the ad-hoc network is self adaptive. This paper presents a scheme to balance the load with energy efficiency considering both congestion and the nodes energy usage. A threshold value is used...
Internet congestion occurs when the aggregate demand for a resource (e.g., link bandwidth) exceeds the available capacity of the resource. TCP is used as a Transport Protocol for most of the applications on the Internet and is also responsible for adjusting to network congestion dynamically. TCPs congestion control mechanism is insufficient in a wireless environment because packet loss does not always...
Although many fundamental issues have been studied in ad hoc wireless network, it is still in the development phase due to their design complexity. Therefore, a large research space still remains open for further exploration. Among the lot of challenges in ad hoc wireless networks, designing efficient rate based transport protocols for multihop ad hoc wireless networks get significant importance due...
Wireless Multimedia Sensor Network (WMSN) is the most popular sensor network and is getting fame over the past half a decade. The main compositions of the WMSN are the sensor nodes comprising of any of sensor systems like cameras, microphones, receiving systems and so on. In such a system with the sensor nodes emitting the confidential data, an extra authentication could be incorporated to the system...
This project focuses on both dynamic channel assignment and multi-interface is used to improve the flexibility and the capacity of wireless mesh networks (WMNs). However, overheads that are generated by uncontrolled interface switching adversely decrease the performance of WMNs. To overcome the trade-off between flexibility and switching overheads, we propose a Hybrid channel-assignment protocol (HCAP)...
Delivering the data in real time is important for the sensors deployed for monitoring and control applications of critical systems. If wireless sensors are used in such systems, interference from other wireless devices operating in the same premises is a major problem that can cause transmission errors and data delivery failures. Design and implementation of Interference mitigation schemes that offer...
Energy consumption is a major issue in the wide deployment of Voice-over-IP (VoIP) over IEEE 802.11 wireless LAN. This energy can be conserves by staying in sleep mode during VoIP call over WLAN. To this end, researchers have conducted extensive simulation and analytical studies to determine the consumed energy during VoIP call in different WLANs. These previous works, however, assume stations are...
Resource management is a primary research area of concern in Wireless Sensor Network (WSN) since the sensors are battery powered devices. An efficient power control technique is essential to maintain reliable communication links in WSN, to maximise the battery life of the sensor node and in turn the sensor network. Hence every sensor should transmit at optimum power while maintaining connectivity...
Reduction of peak-to-average power ratio (PAPR) in orthogonal frequency-division multiplexing (OFDM) system using the partial transmit sequence (PTS) approach. In PTS, the total search for the number of subblocks and the rotation factors must be accomplished. As the number of subblocks and rotation factors increases, PAPR reduction improves. The number of calculation increases as the number of subcarriers...
Location management is a fundamental issue of the personal communication system. In this paper we have introduced a novel technique of location management. The proposed scheme is based on data replication from old home location register to current home location register of the mobile terminal. Here the current home location register replicate the data from old home location register then perform the...
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