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´ÙÀ½°Ç
ÇѱÛÁ¦¸ñ(Korean Title)
¹«¼±LAN ȯ°æ¿¡¼ TDMA¹æ½ÄÀ» ÀÌ¿ëÇÑ µ¿ÀÏä³Î °£¼· °¨¼Ò
¿µ¹®Á¦¸ñ(English Title)
Co-channel Interference Reduction in TDMA based Wireless LAN
ÀúÀÚ(Author)
ÁÖ ºÀ
ÃÖ¿ëÈÆ
¹Ú¼ö¿ø
À̽ÂÇü
Feng Zhou
Yong-Hoon Choi
Suwon Park
Seung Hyong Rhee
¿ø¹®¼ö·Ïó(Citation)
VOL 39 NO. 02 PP. 0192 ~ 0197 (2012. 04)
Çѱ۳»¿ë
(Korean Abstract)
µ¿ÀÏ Ã¤³Î °£¼·Àº ÁÖÆļö°¡ °°Àº µ¿ÀÏ Ã¤³Î¿¡¼ µÑ ¶Ç´Â ±× ÀÌ»óÀÇ ÀüÆÄ°¡ ¼ö½Å±â¿¡¼ °£¼·ÇÏ¿© Àå¾Ö°¡ ¹ß»ýÇÏ´Â Çö»óÀÌ´Ù. º» ³í¹®¿¡¼´Â °í¹ÐµµÀÇ ¹«¼±·£ ȯ°æ¿¡¼ µ¿ÀÏ Ã¤³Î °£¼· ¹®Á¦¸¦ ¿¬±¸ÇÏ°í TDMA(Time Division Multiplexing Access) ¾Ë°í¸®ÁòÀ» ÀÌ¿ëÇÏ¿© °³¼±¹æ¹ýÀ» Á¦¾ÈÇÑ´Ù. ¸ÕÀú ¹«¼±·£ °³¹ß°úÁ¤¿¡¼ Çٽɱâ¼ú¹®Á¦¸¦ ¾ð±ÞÇÏ°í µ¿ÀÏä³Î °£¼·ÀÇ ¿¬±¸ ¹è°æÀ» Á¦½ÃÇÑ´Ù. ±× ÈÄ ³×Æ®¿öÅ© ¼º´É¿¡ ¿µÇâÀ» ¸¹ÀÌ ÁÖ´Â MAC(Media Access Control) ÇÁ·ÎÅäÄÝÀ» ¼³¸íÇÏ°í ºÐ¼®ÇÑ´Ù. ¸¶Áö¸·À¸·Î °£¼· Çö»ó ½Ã³ª¸®¿À¸¦ ÅëÇØ Á¦¾ÈÇÑ ¸ÞÄ¿´ÏÁòÀ» ÀÌ¿ëÇÏ¿© ±âÁ¸ÀÇ CSMA/CA(Carrier Sense Multiple Access/Collision Avoidance) ¸ÞÄ¿´ÏÁò°ú ºñ±³ÇÑ´Ù. ½Ã¹Ä·¹À̼ÇÀ» ÅëÇÏ¿© °³¼±µÈ ¼º´ÉÀ» È®ÀÎÇÑ´Ù.
¿µ¹®³»¿ë
(English Abstract)
Co-channel interference is a phenomenon that two or more radio wave interfere each other in same geographic area transmit on the same frequency. In this paper, we discuss the problem of co-channel interference in high-density wireless LAN(Local Area Network) environment and propose a way to improve throughput and delay by using TDMA(Time Division Multiplexing Access) algorithm based on WLAN. First, the key technical problem of WLAN during its development process is pointed out and the research background of co-channel interference in WLAN is offered; then we analyze MAC layer protocol of IEEE 802.11b standard, which mainly affects system throughputs and channel quality. Based on a half-coverage area scenario, we provide the proposed mechanism with TDMA-based scheme. The simulation results show network throughput improvement and transmission delay reduction comparing with original CSMA/CA(Carrier Sense Multiple Access/Collision Avoidance) with RTS/CTS(Ready-To-Send/Clear-To-Send) mechanism. Finally, we summarize the achievement that we have made.
Å°¿öµå(Keyword)
µ¿ÀÏ Ã¤³Î °£¼·
¹«¼±·£
Co-channel interference
Wireless LAN
TDMA
CSMA/CA
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