Title
CRMA: collision-resistant multiple access
Abstract
Efficiently sharing spectrum among multiple users is critical to wireless network performance. In this paper, we propose a novel spectrum sharing protocol called Collision-Resistant Multiple Access (CRMA) to achieve high efficiency. In CRMA, each transmitter views the OFDM physical layer as multiple orthogonal but sharable channels, and independently selects a few channels for transmission. The transmissions that share the same channel naturally add up in the air. The receiver extracts the received signals from all the channels and efficiently decodes the transmissions by solving a simple linear system. We implement our approach in the Qualnet simulator and show that it yields significant improvement over existing spectrum sharing schemes. We also demonstrate the feasibility of our approach using implementation and experiments on GNU Radios.
Year
DOI
Venue
2011
10.1145/2030613.2030621
MobiCom
Keywords
Field
DocType
sharable channel,collision-resistant multiple access,multiple user,multiple orthogonal,qualnet simulator,high efficiency,ofdm physical layer,significant improvement,gnu radios,novel spectrum sharing protocol,cdma,ofdm,wireless network,linear system,physical layer,spectrum
Transmitter,Wireless network,Linear system,Computer science,Computer network,Communication channel,Physical layer,Code division multiple access,Orthogonal frequency-division multiplexing,Decodes,Distributed computing
Conference
Citations 
PageRank 
References 
26
1.11
34
Authors
7
Name
Order
Citations
PageRank
Tianji Li133122.75
Mi Kyung Han21406.88
Apurv Bhartia31298.12
Lili Qiu43987284.13
Eric Rozner564228.07
Yin Zhang63492281.04
Brad Zarikoff7291.60