ÇѱÛÁ¦¸ñ(Korean Title) |
ns-2 ½Ã¹Ä·¹ÀÌÅ͸¦ ÀÌ¿ëÇÑ Àº´Ð ³ëµå¿Í CCA Áö¿¬ ¾Ë°í¸®ÁòÀÌ IEEE 802.15.4 ³×Æ®¿öÅ©ÀÇ ¼º´É¿¡ ¹ÌÄ¡´Â ¿µÇ⠺м® |
¿µ¹®Á¦¸ñ(English Title) |
Analysis of Effects of Hidden Nodes and CCA Deferment Algorithm on IEEE 802.15.4 Performance Using ns-2 Simulator |
ÀúÀÚ(Author) |
Çö±Ô¿Ï
½Å¿¬¼ø
¾ÈÁ¾¼®
ÀÌ°¿ì
Gyuwan Hyun
Younsoon Shin
Jongsuk Ahn
Kangwoo Lee
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¿ø¹®¼ö·Ïó(Citation) |
VOL 16-C NO. 03 PP. 0393 ~ 0406 (2009. 06) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â IEEE 802.15.4ÀÇ ¼º´ÉÀ» Á¤È®ÇÏ°Ô Æò°¡Çϱâ À§ÇÏ¿© ns-2¿¡ Ãß°¡ÇÑ µÎ °¡Áö ±â´ÉÀ» ¼Ò°³ÇÑ´Ù. ù°´Â Àüü ³ëµåÀÇ ¼ö¿Í Àº´Ð³ëµåÀÇ ¼ö°¡ Á¤ÇØÁü¿¡ µû¶ó ³ëµåµéÀÇ ¹èÄ¡¸¦ ÀÚµ¿À¸·Î °áÁ¤ÇÏ´Â Àº´Ð ³ëµå ¹èÄ¡ ¹æ¾È°ú Àº´Ð ³ëµå·Î ÀÎÇÑ ½ÅÈ£ Ãæµ¹À» ±¸º°ÇÏ´Â ¹æ¾ÈÀÌ´Ù. µÑ°´Â 2003 Ç¥Áظ¸ ±¸ÇöµÇ¾î ÀÖ´Â ÇöÀçÀÇ ns-2 2.33 ¹öÀü¿¡ 2006 Ç¥ÁØ¿¡ ±â¼úµÈ CCA Áö¿¬ ó¸® ¹æ¾ÈÀ» ±¸ÇöÇÏ¿´´Ù. ±â´ÉÀÌ È®ÀåµÈ ns-2¸¦ ÀÌ¿ëÇÏ¿©, 802.15.4 ³×Æ®¿öÅ©ÀÇ ¼º´É¿¡ Àº´Ð ³ëµå¿Í CCA Áö¿¬¿¡ ´ëÇÑ Ã³¸® ¹æ¾ÈÀÌ ¹ÌÄ¡´Â ¿µÇâÀ» Á¤È®ÇÏ°Ô ºÐ¼®ÇÒ ¼ö ÀÖ°Ô µÇ¾ú´Ù. ½Ã¹Ä·¹ÀÌ¼Ç °á°ú Àº´Ð ³ëµå°¡ ¾øÀ» ¶§¿¡ ºñÇÏ¿© Àº´Ð ³ëµå°¡ ´Ü Çϳª Á¸ÀçÇÒ ¶§ ³×Æ®¿öÅ© 󸮷®ÀÌ ¾à 66% °¨¼ÒÇϸç, Ãæµ¹À²Àº 65%¿¡¼ 90%·Î ±ÞÁõÇÑ´Ù. CCA Áö¿¬ ó¸® ¾Ë°í¸®ÁòÀÇ 2003 Ç¥ÁØ°ú 2006 Ç¥ÁØ¿¡ µû¸£¸é, Ãæµ¹ È®·üÀº ¾à 19%±îÁö Â÷À̸¦ º¸ÀÌ°í, 󸮷®Àº ¾à 38% Â÷À̸¦ º¸À̸ç 2006 ¹öÀüÀÌ ¿ì¼öÇÑ ¼º´ÉÀ» º¸Àδ٠|
¿µ¹®³»¿ë (English Abstract) |
This paper introduces two functions added to the current version of ns-2 simulator for better accuracy of IEEE 802.15.4 network simulations. The first one is to automatically place hidden nodes over the ring topology in which the coordinator is centered, when the number of hidden nodes and total number of nodes is given. Collisions of signals can be distinguished into the trace file according to the ways of participation of hidden nodes. The second one is the CCA deferment algorithm described in IEEE 802.15.4-2006 standard which is not implemented in the current version of ns-2. Owing to these additional functions, we can carry out the precise analysis of the performance effects of hidden nodes and CCA deferment algorithm on 802.15.4 networks. Simulation results present at least 66% of performance degradation in throughput and drastic increase of collision probability up to 90% from 65% by just a single hidden node. Besides, 2006 standard for CCA deferment algorithm gives 19% lower collision probability and 38% higher performance. |
Å°¿öµå(Keyword) |
802.15.4
ns-2
Àº´Ð ³ëµå
Àü¼Û Ãæµ¹
CCA Áö¿¬
IEEE 802.15.4
ns-2
hidden nodes
signal collisions
CCA deferment
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