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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)

Current Result Document :

ÇѱÛÁ¦¸ñ(Korean Title) ¹«¼± Ad-hoc ³×Æ®¿öÅ©¿¡¼­ TCP ¼º´É Çâ»óÀ» À§ÇÑ µ¿Àû È¥ÀâÀ©µµ¿ì Á¶Á¤ ¾Ë°í¸®Áò
¿µ¹®Á¦¸ñ(English Title) An Dynamic Congestion Window Tuning Algorithm for TCP Performance Improvement in Wireless Ad-hoc Network
ÀúÀÚ(Author) ±è°ü¿õ   ¹è¼ºÈ¯   Kwan-woong Kim   Sung-hwan Bae  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 08 PP. 1384 ~ 1390 (2008. 08)
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(Korean Abstract)
TCP´Â À¯¼±¸ÁÀ» À§ÇÏ¿© ¼³°èµÇ¾ú±â ¶§¹®¿¡, À¯¼±¸Á°ú ´Ù¸¥ Ư¼ºÀ» °¡Áø ¹«¼±¸Á¿¡¼­ ¼­ºñ½ºµÇ´Â °æ¿ì ¼º´ÉÀÌ Å©°Ô ÀúÇϵȴÙ. ¹«¼± Ad-hoc ³×Æ®¿öÅ©¿¡¼­ È¥ÀâÀ©µµ¿ì(congestion window) °ªÀº TCPÀÇ ¼º´É¿¡ Å©°Ô ¿µÇâÀ» ÁØ´Ù. ³×Æ®¿öÅ© »óȲ¿¡ µû¶ó ÀûÀýÇÑ Å©±âÀÇ È¥Àâ À©µµ¿ì °ªÀ» ¼³Á¤ÇÔÀ¸·Î¼­ TCP ¼º´ÉÀ» Çâ»ó½Ãų ¼ö ÀÖ´Ù. º» ³í¹®¿¡¼­´Â ¹«¼± Ad-hoc ³×Æ®¿öÅ©¿¡¼­ TCP ¼º´ÉÀ» Çâ»ó½ÃÅ°´Â »õ·Î¿î TCP ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈµÈ ¾Ë°í¸®ÁòÀº TCP ¼ö½ÅÃø¿¡¼­ ÃÖÀûÀÇ À©µµ¿ì Å©±â¸¦ ÃøÁ¤ÇÏ°í, ACK ÆÐŶÀÇ À©µµ¿ì Çʵ带 »ç¿ëÇÏ¿© CWL(Congestion Window Limit)¸¦ ÃÖÀû °ª¿¡ ¼¼ÆÃÇÏ´Â ÃÖ´ë È¥ÀâÀ©µµ¿ì Á¶Á¤ ±â¹ýÀÌ´Ù. ¹«¼± Ad-hoc ³×Æ®¿öÅ©ÀÇ ´Ù¾çÇÑ È¯°æ¿¡¼­ ÄÄÇ»ÅÍ ½Ã¹Ä·¹À̼ÇÀ» ¼öÇàÇÑ °á°ú Á¦¾ÈµÈ ¾Ë°í¸®ÁòÀÌ ±âÁ¸ TCP new reno ÇÁ·ÎÅäÄݺ¸´Ù Àü¼Û·ü ¹× ÆÐŶ ¼Õ½Ç¿¡¼­ ¼º´ÉÀ» Å©°Ô Çâ»óÇÏ¿´´Ù.
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(English Abstract)
The TCP protocol is originally designed for wired network, however it performs very poor in wireless network due to different nature of wireless network from wired networks. In terms of TCP performance improvement in wireless Ad-hoc network, many researches show that small congestion window size of TCP connection can improve TCP performance. We propose a new TCP algorithm to improve TCP performance in wireless Ad-hoc network. The basic idea of our approach is that TCP receiver estimates the optimum window size and then sets congestion window limit of TCP sender to an optimum value by using the advertised window field in TCP ACK packet. From extensive computer simulation, the proposed algorithm shows superior performance than traditional TCP protocols in terms of packet delivery ratio and packet loss.
Å°¿öµå(Keyword) TCP   Congestion control   MANET(Mobile Ad Hoc-NETwork)  
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