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Ȩ Ȩ > ¿¬±¸¹®Çå > ±¹³» ³í¹®Áö > Çѱ¹Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö > Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö C

Á¤º¸Ã³¸®ÇÐȸ ³í¹®Áö C

Current Result Document : 2 / 2 ÀÌÀü°Ç ÀÌÀü°Ç

ÇѱÛÁ¦¸ñ(Korean Title) Àº´Ð³ëµå¸¦ °í·ÁÇÑ LR-WPAN ¼º´ÉÀÇ ºÐ¼®Àû ¸ðµ¨
¿µ¹®Á¦¸ñ(English Title) An Analytical Model for LR-WPAN Performance in the Presence of Hidden Nodes
ÀúÀÚ(Author) ½Å¿¬¼ø   Çö±Ô¿Ï   ¾ÈÁ¾¼®   ±èÈñö   ÀÌ°­¿ì   Younsoon Shin   Gyuwan Hyun   Jongsuk Ahn   Hiecheol Kim   Kangwoo Lee  
¿ø¹®¼ö·Ïó(Citation) VOL 16-C NO. 01 PP. 0133 ~ 0142 (2009. 02)
Çѱ۳»¿ë
(Korean Abstract)
ÀÌ ³í¹®¿¡¼­´Â Àº´Ð ³ëµå(hidden node)µéÀÌ Àִ ȯ°æ¿¡¼­ IEEE 802.15.4ÀÇ ¼º´ÉÀ» Á¤È®ÇÏ°Ô ¿¹ÃøÇÒ ¼ö ÀÖ´Â ¼öÇÐÀû ¸ðµ¨À» Á¦½ÃÇÑ´Ù. ±âÁ¸ÀÇ 802.15.4 ¼º´É ºÐ¼®À» À§ÇÑ ¼öÇÐÀû ¸ðµ¨Àº Àº´Ð ³ëµåµéÀÌ ¾ø´Â, Áï ¸ðµç ³ëµåµéÀº ´Ù¸¥ ³ëµåµéÀÇ Àü¼Û »óŸ¦ ÃøÁ¤ÇÒ ¼ö ÀÖ´Â ÀÌ»óÀûÀÎ »óȲ ¸¸À» °í·ÁÇÏ¿´´Ù. ±×·¯³ª ³ëµåµéÀÇ ¹èÄ¡¿¡ µû¶ó¼­ Àº´Ð ³ëµåµéÀÌ ºó¹øÇÏ°Ô ¹ß»ýÇÒ ¼ö ÀÖ¾î, ±âÁ¸ÀÇ ¸ðµ¨µéÀº Çö½ÇÀû ȯ°æ¿¡¼­ 802.15.4ÀÇ ¼º´ÉÀ» Á¤È®È÷ ÃøÁ¤ÇÏÁö ¸øÇÏ´Â ¹®Á¦°¡ ÀÖ´Ù. ÀÌ·¯ÇÑ ¹®Á¦¸¦ ÇØ°áÇϱâ À§Çؼ­ ÀÌ ³í¹®¿¡¼­ Á¦¾ÈÇÑ ¸ðµ¨Àº ±âÁ¸ÀÇ 802.15.4ÀÇ ¼º´É ¸ðµ¨¿¡ Àº´Ð³ëµåÀÇ ¼º´É ¿µÇâ ¸ðµ¨À» Ãß°¡ÇÏ¿´´Ù. Á¦¾ÈÇÑ 802.15.4ÀÇ ¼öÇÐÀû ¼º´É ¸ðµ¨¿¡ ÀÇÇϸé ÀÛÀº Àº´Ð ³ëµåÀÇ ¼ö¿¡ ÀÇÇØ ¼º´ÉÀÌ ±Þ°ÝÇÏ°Ô ÀúÇϵȴÙ. ÀÏ·Ê·Î Àüü ³ëµåÀÇ 5%°¡ Àº´Ð³ëµåÀÏ ¶§ 802.15.4ÀÇ ¼º´ÉÀÌ ÃÖ´ë 62% ÀúÇϵȴÙ. ÀÌ·¯ÇÑ ¿¹ÃøÇÑ °á°ú´Â ns-2ÀÇ ½Ã¹Ä·¹ÀÌ¼Ç °á°ú¿Í ºñ±³ÇÒ ¶§, ÃÖ´ë 6%ÀÇ ¿À·ùÇѵµ¿¡¼­ µ¿ÀÏÇÏ´Ù.
¿µ¹®³»¿ë
(English Abstract)
This paper proposes an analytical performance model of IEEE 802.15.4 in the presence of hidden nodes. Conventional 802.15.4 mathematical models assume ideal situations where every node can detect the transmission signal of every other nodes different from the realistic environments. Since nodes can be randomly located in real environments so that some nodes' presence is hidden from other ones, this assumption leads to wrong performance evaluation of 802.15.4. For solving this problem, we develop an extended performance model which combines the traditional 802.15.4 performance model with one for accounting the presence of hidden nodes. The extended model predicts the rapid performance degradation of 802.15.4 due to the small number of hidden nodes. The performance, for example, degrades by 62% at maximum when 5% of the total nodes are hidden. These predictions are confirmed to be equal to those of ns-2 simulations by less than 6% difference.
Å°¿öµå(Keyword) 802.15.4   CSMA/CA   Æ÷È­Á¶°Ç   󸮷®   Àü¼Û Ãæµ¹   Àº´Ð³ëµå   802.15.4   CSMA/CA   Saturation Throughput   Collision   Hidden Node  
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