Paper Info
Title
Adaptation of Multiple Access Parameters in Time Hopping UWB Cluster Based Wireless Sensor Networks
Abstract
Ultrawideband (UWB) is an attractive physical layer technology for wireless sensor networks due to its unique characteristics. Flexibility in adjusting the processing gain of UWB systems makes it possible to tune the data rate and transmission range to fulfill the requirements of spe- cific applications. Conventional systems assign identical multiple access parameters to all users regardless of the signal-to-interference plus noise ratio of the received sig- nal. In this paper an adaptive assignment scheme for multi- ple access parameters in cluster based wireless sensor net- works is investigated. First, an orthogonal time hopping sequenceconstruction is proposed for synchronouscommu- nications (downlink), where the number of pulses per sym- bol are adjusted to meet the bit error rate requirement of an application. Then, adaptation of multiple access parame- ters in asynchronous scenarios (uplink) is evaluated using a Gaussian approximationmethod to modelthe multiple ac- cess interference in two cases: one with fixed frame dura- tion, where the goal is to increase the average throughput, and the other with fixed symbol duration, where the goal is to increase the network lifetime. Finally, a mathematical framework is developed for approximating the interference when the number of pulses per symbol and the frame dura- tion vary.
Year
DOI
Venue
2004
10.1109/MAHSS.2004.1392162
Mobile Adhoc and Sensor Systems
Keywords
DocType
ISBN
wireless sensor networks,physical layer,signal to interference plus noise ratio,bit error rate,gaussian distribution,noise,wireless sensor network,ultrawideband,time hopping,synchronous communication
Conference
0-7803-8815-1
Citations 
PageRank 
References 
8
0.51
8
Authors
4
Name
Order
Citations
PageRank
Ismail Güvenç12041153.03
Hüseyin Arslan233233.33
Sinan Gezici368266.18
Hisashi Kobayashi414612.99