Á¤º¸°úÇÐȸ³í¹®Áö (Journal of KIISE)
Current Result Document :
ÇѱÛÁ¦¸ñ(Korean Title) |
¹«¼± ȯ°æ¿¡¼ Áö¿¬±â¹Ý TCPÀÇ ¼º´É Çâ»óÀ» À§ÇÑ ¼öÁ¤µÈ RTT ÃøÁ¤ ±â¹ý |
¿µ¹®Á¦¸ñ(English Title) |
Modified RTT Estimation Scheme for Improving Throughput of Delay-based TCP in Wireless Networks |
ÀúÀÚ(Author) |
°Çö¼ö
¹ÚÁö¿ì
Á¤±¤¼ö
Hyunsoo Kang
Jiwoo Park
Kwangsue Chung
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¿ø¹®¼ö·Ïó(Citation) |
VOL 43 NO. 08 PP. 0919 ~ 0926 (2016. 08) |
Çѱ۳»¿ë (Korean Abstract) |
¹«¼± ³×Æ®¿öÅ©¿¡¼ TCP´Â ¹«¼±¸ÁÀÇ Æ¯Â¡À¸·Î ÀÎÇÑ ÆÐŶ ¼Õ½ÇÀ» È¥Àâ»óÅ¿¡ ÀÇÇÑ ¼Õ½Ç·Î À߸øÆÇ´ÜÇÏ´Â ¹®Á¦¿Í ¿¬°áµÈ µð¹ÙÀ̽ºµéÀÇ »óÅ º¯È·Î ÀÎÇÑ ÀæÀº 󸮷®ÀÇ º¯µ¿ ¹®Á¦ ¶§¹®¿¡ ¼º´É ÀúÇϸ¦ ÀÏÀ¸Å²´Ù. Áö¿¬ ±â¹Ý TCP´Â RTT(Round Trip Time)¸¦ ÀÌ¿ëÇÏ¿© À©µµ¿ìÀÇ Å©±â¸¦ Á¶ÀýÇϱ⠶§¹®¿¡ ¼Õ½ÇÀÇ ¿µÇâÀ» ¹ÞÁö ¾Ê¾Æ ºÒÇÊ¿äÇÏ°Ô Àü¼Û ¼Óµµ¸¦ ³·Ãß´Â ¹®Á¦¸¦ ÇØ°áÇÒ ¼ö ÀÖ´Ù. µû¶ó¼ º» ³í¹®¿¡¼´Â Áö¿¬±â¹Ý TCP¸¦ ÀÌ¿ëÇÏ¿© ¼º´É ÀúÇϸ¦ °³¼±½ÃÅ°´Â ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÏ¿© µÎ °¡Áö ¹®Á¦ ¸ðµÎ¸¦ ÇØ°áÇÏ·Á ÇÏ¿´´Ù. Á¦¾ÈÇÏ´Â ±â¹ýÀº ³×Æ®¿öÅ© »óŸ¦ ºü¸£°Ô ¹Ý¿µÇÏ´Â RTT¸¦ BaseRTT ÃøÁ¤¿¡ Ãß°¡ÇÏ¿© ÀûÀÀÀûÀ¸·Î º¯ÈÇÒ ¼ö ÀÖµµ·Ï ÇÏ¿´À¸¸ç, È¥Àâ À©µµ¿ì Å©±âÀÇ Áõ°¡ °¨¼Ò·®°ú BaseRTTÀÇ ÃøÁ¤ °¡ÁßÄ¡¸¦ ¹öÆÛ ÀÜ·ù·®À» ±âÁØÀ¸·Î º¯È½ÃÄÑ ¾ÈÁ¤¼ºÀ» ´õÇÏ¿´´Ù. ½Ã¹Ä·¹À̼ÇÀ» ÅëÇÏ¿© Á¦¾ÈÇÏ´Â ±â¹ýÀÌ ¹«¼± ³×Æ®¿öÅ©¿¡¼ÀÇ Ã³¸®·® º¯µ¿ ¹®Á¦¸¦ ±âÁ¸ÀÇ ¹æ¹ýº¸´Ù ¿ÏȽÃų ¼ö ÀÖÀ½À» È®ÀÎÇÏ¿´´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In a wireless network, TCP causes the performance degradation because of mistaking packet loss, which is caused by characteristics of wireless link and throughput oscillation due to change of devices connected on a limited bandwidth. Delay based TCP is not affected by packet loss because it controls window size by using the RTT. Therefore, it can solve the problem of unnecessary degradation of the rate caused by misunderstanding reason of packet loss. In this paper, we propose an algorithm for improving the remaining problems by using delay based TCP. The proposed scheme can change throughput adaptively by adding the RTT, which rapidly reflects the network conditions to BaseRTT. It changes the weight of RTT and the increases and decreases window size based on the remaining amount of the buffer. The simulation indicated that proposed scheme can alleviate the throughput oscillation problem, as compared to the legacy TCP Vegas.
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Å°¿öµå(Keyword) |
¹«¼± ³×Æ®¿öÅ©
Áö¿¬±â¹Ý TCP
RTT ÃøÁ¤
È¥ÀâÁ¦¾î
wireless networks
delay-based TCP
RTT estimation
congestion control
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ÆÄÀÏ÷ºÎ |
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