Creating subchannels to improve throughput in wireless communication

This thesis focuses on the impact of splitting a single communciation channel into two separate subchannels. One subchannel is used to send large packets, and the other sends small packets. This split allows for the spectrum to be used more efficiently. Large throughput gains are possible, even with different mixes of traffic patterns. The effect of different guard bands was studied using the USRP and GNU Radio. Two daughterboards were used for each USRP so that two channels were used for transmission. The two transmissions had the same throughput whether the channels were placed very far aparta or within a subcarrier of each other. An implementation of this scheme was simulated using the NS-2 network simulator. The implications of splitting the channel are studied, showing the impact of different levels of small packet traffic on the overall network throughput. In these simulations, a simple topology was used. This topology was a base station with a varying, though small, number of surrounding nodes. Also studied was a simple bandwidth allocation algorithm that was generated from the results of the simulations.

Name thesis:degree_name

M.S.

Level thesis:degree_level

Thesis

Discipline thesis:degree_discipline

Electrical & Computer Engr

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Proulx, Brian B.

Contributors dc:contributor

• Vaidya, Nitin H.

• Wireless Communication
• Subchannels

Statement dc:rights

• Copyright 2010 Brian B. Proulx

Language dc:language

en

Handle dc:identifier

http://hdl.handle.net/2142/18330

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/18330