Đang chuẩn bị liên kết để tải về tài liệu:
Báo cáo hóa học: " A new approach to geographic routing for location aided cluster based MANETs"

A new approach to geographic routing for location aided cluster based MANETs | Mangai and Tamilarasi EURASIP Journal on Wireless Communications and Networking 2011 2011 18 EURASIP Journal on . http jwcn.eurasipjournals.eom content 2011 1 i8 Wireless Communications and Networking a SprlngerOpen Journal RESEARCH Open Access A new approach to geographic routing for location aided cluster based MANETs SenthilVelmurugan Mangai1 and Angamuthu Tamilarasi2 Abstract Routing has been the main challenge for ad hoc networks due to dynamic topology as well as resource constraints. Completely GPS Global Positioning System free as well as GPS scarce positioning systems for wireless mobile ad-hoc networks has been proposed recently by many authors. High computational overhead and high mobility of the nodes typically require completely GPS enabled MANETs for higher performance. In this article Improved Location aided Cluster based Routing Protocol ILCRP for GPS enabled MANETs has been evaluated for performance metrics such as end to end delay control overhead and packet delivery ratio. Use of cluster based routing as well as exact location information of the nodes in ILCRP reduces the control overhead resulting in higher packet delivery ratio. GPS utility in nodes reduces the end to end delay even during its high mobility. Simulations are performed using NS2 by varying the mobility speed of nodes as well as number of the nodes. The results illustrate that ILCRP performs better compared to other protocols. Keywords MANET GPS Routing Algorithm Location aided routing Cluster based routing Stable clustering Introduction Resource Constraint is an extreme challenge faced by a routing protocol designed for ad hoc wireless networks. Gadgets used in the ad hoc wireless networks in most cases require portability and hence they also have size and weight constraints along with the restrictions on the power source. Control overhead increases due to mobility of the nodes resulting in bandwidth constraint. Mobility also affects end to end delay as well as packet delivery .