Çѱ¹Á¤º¸Åë½ÅÇÐȸ ³í¹®Áö (Journal of the Korea Institute of Information and Communication Engineering)
ÇѱÛÁ¦¸ñ(Korean Title) |
¹«¼± ¼¾¼³×Æ®¿öÅ©¿¡¼ÀÇ Åë°èÀû ¹æ¹ý¿¡ ÀÇÇÑ ½Ç³» RSSI ÃøÁ¤ |
¿µ¹®Á¦¸ñ(English Title) |
Indoor RSSI Characterization using Statistical Methods in Wireless Sensor Network |
ÀúÀÚ(Author) |
ǪÃÓÄ£
Á¤¿Ï¿µ
Chuan-Chin Pu
Wan-Young Chung
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¿ø¹®¼ö·Ïó(Citation) |
VOL 11 NO. 11 PP. 2172 ~ 2178 (2007. 11) |
Çѱ۳»¿ë (Korean Abstract) |
½Ç³» ȯ°æ¿¡¼ ÀÌ·¯ÇÑ µÎ°¡Áöº¯¼öÀÎ ´ë±Ô¸ð¿¡¼ÀÇ °æ·Î¼Õ½Ç°ú ¼Ò±Ô¸ð¿¡¼ÀÇ ÆäÀ̵ùÇö»óÀº °Å¸®¿¡ ´ëÇÑ RSSI(Received Signal Strength Indicator) °ªÀÇ ºñ¼±ÇüÀûÀÎ º¯È¸¦ À¯¹ßÇÏ°Ô µÇ¸ç ÀÌ·¯ÇÑ Çö»óÀÌ ½Ç³»À§Ä¡ ÃßÀû¿¡¼ÀÇ ¹®Á¦Á¡ÀÇ Çϳª·Î ÁöÀûµÇ°í ÀÖ´Ù. ÀÌ ¿¬±¸¿¡¼´Â µ¿ÀÏÇÑ ¹æ¿¡¼ÀÇ ´Ù¸¥ À§Ä¡¿Í ½Ã°£¿¡¼ÀÇ RSSIº¯È¸¦ ½ÇÇè¿¡ ÀÇÇÑ Åë°è¿¡ ÀÇÇØ Ã£¾Æ¼ º¸´Ù Á¤¹ÐÇÑ ¸ðµ¨À» ¼¼¿ö¼ ½Ç³» RSSI Ư¼ºÈ¸¦ ÀÌ·ç·Á°í ÇÏ¿´´Ù. ½ÇÇè¿¡¼ RSSI°ªÀÌ °ø°£°ú ÀϽÃÀûÀÎ ¿äÀÎ µÎ °¡Áö¿¡ ÀÇÇØ °áÁ¤µÇ´Â °ÍÀÌ È®ÀεǾú°í ´Ù¸¥ À§Ä¡¿¡ ÀÖ´Â ¸ðµç ¼¾¼³ëµåµµ °ø°£Â÷¶ó¸ÞÅÍ´Â ´Ù¸£Áö¸¸ Àӽà ÆĶó¸ÞÅÍ°ªÀº µ¿ÀÏÇÏ´Ù´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù. Àӽà ÆĶó¸ÞÅ͵鵵 ȯ°æº¯È¿¡ µû¶ó õõÈ÷ ½Å°£¿¡ µû¶ó º¯ÈÇÏ´Â ´ë±Ô¸ðÀû ÀÎ º¯¼öÀÇ Æ¯¼ºÀ» Áö´Ñ´Ù. ÀÌ·¯ÇÑ °ü°è¸¦ È°¿ëÇÏ¿© À§Ä¡ÃßÀûÀ» º¸´Ù È¿À²Àû ÀÌ°í Á¤¹ÐÇÏ°Ô Æò°¡ÇÒ ¼ö ÀÖ¾ú´Ù.
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¿µ¹®³»¿ë (English Abstract) |
In indoor environment, the combination of the two variations, large scale (path loss) and small scale (fading), leads to non-linear variation of RSSI(received signal strength indicator) values as distance varied. This has been one of the difficulties for indoor location estimation. This paper presents new findings on indoor RSSI characterization for more accurate model building. Experiments have been done statistically to find overall trend of RSSI values at different places and times within the same room. From experiments, it has been shown that the variation of RSSI values can be determined by both spatial and temporal factors. These two factors are directly indicated by the two main parameters of path loss model. The results show that all sensor nodes which are located at different places share the same characterization value for the temporal parameter whereas different values for the spatial parameters. The temporal parameter also has a large scale variation effect that is slowly time varying due to environmental changes. Using this relationship, the characterization for location estimation can be more efficient and accurate.
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Å°¿öµå(Keyword) |
Spatial
Temporal
RSSI Characterization
Wireless Sensor Network
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