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Shanmugavel, S.
- Energy Efficient Vertical Handoff Execution by Implementing Dynamic Handoff Technique (DHT-HN) in Heterogeneous Networks
Authors
1 College of Engineering, Department of Electronics and Communication, Anna University, Chennai-25, IN
Source
Wireless Communication, Vol 5, No 7 (2013), Pagination: 309-314Abstract
The requirements of Heterogeneous network are: ubiquitous roaming and users may have access to networks of different access technologies, wide spectrum of services and "always best Connected network. The main requirement of heterogeneous networks is: dynamic effective handoff through the entire network without losing the network lifetime and energy efficiency. In this paper, Dynamic handoff technique (DHT) for heterogeneous Network (DHT-HN) has been proposed for vertical handoff execution phase and also to prolong the network lifetime and connectivity. Most of the existing networks such as sensor, mesh network and ad-hoc network focused on homogeneity and static handoff technique which can be applied only for homogeneous networks and provides low performance. In this paper the impact of heterogeneity and vertical handoff execution process in terms of DHT have been discussed and also compared with existing MIP based dynamic scheme. By implementing Dynamic Handoff Technique in heterogeneous networks, achieves energy savings up to 70% in Heterogeneous networks. Finally the simulation result demonstrates with different network environment and hence this paper achieved throughput by DHT-HN in HN with longer lifetime and more effective data packets in comparison of homogeneous network with the existing protocol.Keywords
Energy Aware, DHT-MIP, Dynamic Handoff Technique (DHT- HN).
- Energy Optimization Packet Scheduling Algorithms on a Mobile Wimax Using Ns2
Authors
1 CEG, Anna University Chennai, Tamil Nadu, IN
2 VIT University, Vellore, Tamil Nadu, IN
3 Department of Electronics and Communication Engineering, CEG, Anna University Chennai, Tamil Nadu, IN
Source
Wireless Communication, Vol 1, No 6 (2009), Pagination: 243-248Abstract
Recently, mobile communication technologies have been developed rapidly. The IEEE 802.16e wireless metropolitan area network (WMAN) standard is an emerging technology to support roaming mobility of mobile stations (MSs) in outdoor environment. For MSs powered by batteries, the standard supports power saving mode to conserve battery power meanwhile fulfilling the requirements of quality of services. Regarding to different service types, standard defines three different power saving types for them and each type has its own power saving parameters. In this paper, Broadband wireless access systems usually provide flexible sleep-mode operations for mobile stations to conserve their energy during idle or active mode. For Mobile WiMAX, the IEEE 802.16e, offers several power-saving classes that can be associated with different types of network connections to minimize power consumption of mobile stations.
Keywords
Mobile WiMAX, Power Saving, Energy Efficiency, Packet Scheduling.- Choosing effects of PHYSICAL CARRIER SENSING in Wireless Adhoc Networks
Authors
1 CEG, Anna University Chennai, Tamil Nadu, IN
2 Electronics and Communication Engineering Department, VIT University, IN
Source
Wireless Communication, Vol 1, No 5 (2009), Pagination: 235-242Abstract
IEEE 802.11 MAC having two methods for medium reservation. 1) virtual carrier sensing and 2) physical carrier sensing. VCS having many drawbacks in wireless ad hoc networks. PCS mechanism can replace the virtual carrier sensing in most practical applications. But choice of PCS threshold plays vital role in ad hoc networks. Choice of PCS threshold is tradeoff between the throughput and spatial reuse. In this paper we present practical experiments for to see the PCS threshold effects on network throughput.