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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)

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ÇѱÛÁ¦¸ñ(Korean Title) ½Ç³» NLOSȯ°æ¿¡¼­ Á¤¹Ðµµ Çâ»óÀ» À§ÇÑ IEEE 802.15.4a ±â¹ÝÀÇ À§Ä¡ÃßÁ¤ ¾Ë°í¸®Áò
¿µ¹®Á¦¸ñ(English Title) IEEE 802.15.4a based Localization Algorithm for Location Accuracy Enhancement in the NLOS Environment
ÀúÀÚ(Author) Â÷À翵   °ø¿µ¹è   ÃÖÁõ¿ø   °íÁ¾È¯   ±Ç¿µ±¸   Jae-Young Cha   Young-Bae Kong   Jeung-Won Choi   Jong-Hwan Ko   Young-Goo Kwon  
¿ø¹®¼ö·Ïó(Citation) VOL 16 NO. 08 PP. 1789 ~ 1798 (2012. 08)
Çѱ۳»¿ë
(Korean Abstract)
IEEE 802.15.4a Ç¥ÁØÀº Á¤È®ÇÑ À§Ä¡ÃßÁ¤ ¼­ºñ½º¸¦ Áö¿øÇϱâ À§ÇÏ¿© time-of-arrival (TOA) ±â¹ÝÀÇ °Å¸®ÃøÁ¤ ±â¼úÀ» Á¦°øÇÑ´Ù. ƯÈ÷, non-line-of-sight (NLOS) »óȲÀº TOA ±â¹ÝÀÇ À§Ä¡ÀνĿ¡¼­ Áß¿äÇÑ ¹®Á¦ÀÌ°í, IEEE 802.15.4a ³×Æ®¿öÅ©ÀÇ ¼º´É¿¡ ½É°¢ÇÑ ¿µÇâÀ» ³¢Ä¥ ¼ö ÀÖ´Ù. º» ³í¹®¿¡¼­´Â ¿¡³ÊÁö È¿À²ÀûÀÎ ³·Àº º¹ÀâµµÀÇ À§Ä¡ÃßÁ¤ ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈÇÑ ¾Ë°í¸®ÁòÀº TOA °Å¸®ÃøÁ¤À» À§ÇØ ¼øÂ÷ÀûÀÎ acknowledgment (ACK) ÆÐŶÀ» ÀÌ¿ëÇÏ°í À§Ä¡ÃßÁ¤Áö¿ªÀ» Á¦ÇÑ ÇÒ ¼ö ÀÖ´Â ÀÛÀº »ç°¢ ¿µ¿ªÀ» ¼³Á¤ÇÔÀ¸·Î½á À§Ä¡¸¦ ÃßÁ¤ÇÑ´Ù. ÆÐŶ ±³È¯À¸·Î ÀÎÇÑ ¸Þ½ÃÁö ¿À¹öÇìµå´Â ¼øÂ÷Àû ACK ÆÐŶÀ» ÀÌ¿ëÇÏ¿© °¨¼ÒµÉ ¼ö ÀÖ´Ù. »ç°¢ ¿µ¿ª ¼³Á¤À» ÅëÇÏ¿© NLOS ȯ°æ¿¡ ÀÖ´Â °Å¸®ÃøÁ¤ °ªÀ» Á¦°ÅÇÏ°í, À§Ä¡ ÃßÁ¤ÀÇ ¿µ¿ªÀ» Á¦ÇÑÇÔÀ¸·Î½á ÃßÁ¤ÇÏ´Â ¿¬»ê ½Ã°£°ú ¿¡³ÊÁö¸¦ ÁÙÀÏ ¼ö ÀÖ´Ù. ½Ã¹Ä·¹À̼ÇÀ» ÅëÇØ ¿¡³ÊÁö ¼Ò¸ð¿Í ÃßÁ¤ À§Ä¡ÀÇ Á¤È®µµ Ãø¸é¿¡¼­ Á¦¾ÈÇÑ ¾Ë°í¸®ÁòÀÌ ±âÁ¸ÀÇ ¾Ë°í¸®Áò º¸´Ù ÁÁÀº ¼º´ÉÀ» º¸ÀÌ´Â °ÍÀ» È®ÀÎ ÇÏ¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
IEEE 802.15.4a standard can provide a variety of location-based services for ZigBee or wireless network applications by adapting the time-of-arrival (TOA) ranging technique. The non-line-of-sight (NLOS) condition is the critical problem in the IEEE 802.15.4a networks, and it can significantly degrade the performance of the TOA-based localization. To enhance the location accuracy due to the NLOS problem, this paper proposes an energy-efficient low complexity localization algorithm. The proposed approach performs the ranging with the multicast method, which can reduce the message overhead due to packet exchanges. By limiting the search region for the location of the node, the proposed approach can enhance the location accuracy. Experimental results show that the proposed algorithm outperforms previous algorithms in terms of the energy consumption and the localization accuracy.
Å°¿öµå(Keyword) IEEE 802.15.4a   NLOS ȯ°æ   À§Ä¡ÃßÁ¤   TOA °Å¸®ÃøÁ¤   IEEE 802.15.4a   NLOS environment   localization   TOA ranging  
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