JICCE (한국정보통신학회)
Current Result Document :
| 한글제목(Korean Title) |
A Study on CSMA/CA for IEEE 802.11 WLAN Environment |
| 영문제목(English Title) |
A Study on CSMA/CA for IEEE 802.11 WLAN Environment |
| 저자(Author) |
Il-Young Moon
Sung-Joon Cho
|
| 원문수록처(Citation) |
VOL 04 NO. 02 PP. 0071 ~ 0074 (2006. 06) |
한글내용
(Korean Abstract) |
|
영문내용
(English Abstract) |
A basic access method about IEEE 802.11 MAC layer protocol using IEEE 802.11 wireless LANs is the DCF thatis based on the CSMA/CA. But, cause of IEEE 802.11 MAC layer uses original backoff algorithm (exponential backoff method), when collision occurred, the size of contention windows increases the double size Also, a time of packet transmission delay increases and efficienty is decreased by original backoff scheme. In this paper, we have analyzed TCP packet transmission time of IEEE 802.11 MAC DCF protocol for wireless LANs a proposed enhanced backoff algorithm. It is considered the transmission time of transmission control protocol (TCP) packet on the orthogonal frequency division multiplexing (OFDM) in additive white gaussian noise (A WGN) and Rician fading channel. From the results, a proposed enhanced backoff algorithm produces a better performance improvement than an original backoff in wireless LAN environment. Also, in OFDM/quadrature phase shift keying channel (QPSK), we can achieve that the transmission time in wireless channel decreases as the TCP packet size increases and based on the data collected, we can infer the correlation between packet size and the transmission time, allowing for an inference of the optimal packet size in the TCP layer. |
| 키워드(Keyword) |
CSMA/CA
Wireless LANs
IEEE 802.11
TCP/IP
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| 파일첨부 |
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