NDLI: C-OFDMA: Improved Throughput for Next Generation WLAN Systems Based on OFDMA and CSMA/CA

Content Provider	IEEE Xplore Digital Library
Author	Haile, G. Jaesung Lim
Copyright Year	2013
Description	Author affiliation: Tactical Network Res. Center, Ajou Univ., Suwon, South Korea (Haile, G.; Jaesung Lim)
Abstract	In Orthogonal Frequency Division Multiple Access (OFDMA), there are multiple sub-channels which enable multiple stations to transmit concurrently on different sub-channels. The stations can obtain the channel information of all the sub-channels at each time instant. Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) allows different stations to randomly contend for the available subchannels from the time domain to avoid collision with each other. This gives a resource in time and frequency domain. In this paper, we present a Concurrent OFDMA-based CSMA/CA (C-OFDMA) MAC protocol for Next Generation Wireless Local Area Network where all the stations that transmit successful Request-To-Send (RTS) packet in the contention phase send their traffic concurrently to the Access Point (AP). The proposed C-OFDMA protocol is compared with existing IEEE 802.11 DCF, IEEE 802.11 RTS/CTS, and Hybrid-OFDMA MAC protocols and simulation results show that it provides improved throughput for crowded WLAN systems.
Sponsorship	IEEE Region 10 - Asia Pacific
Starting Page	497
Ending Page	502
File Size	445314
Page Count	6
File Format	PDF
ISBN	9781467356534
ISSN	21660662
DOI	10.1109/ISMS.2013.121
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-01-29
Publisher Place	Thailand
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless LAN IEEE 802.11 Standards Interframe Space OFDM CSMA/CA Concurrent Throughput Media Access Protocol WLAN OFDMA Multiaccess communication Sub-channel
Content Type	Text
Resource Type	Article

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