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ÇѱÛÁ¦¸ñ(Korean Title) |
ÅÂ±× ¸Þ¸ð¸® Á¢±ÙÀ» À§ÇÑ RFID ¹Ìµé¿þ¾îÀÇ ¾²±â ÇÁ·ÎÅäÄÝ |
¿µ¹®Á¦¸ñ(English Title) |
A Writing Protocol for Accessing Tag Memory in RFID Middleware |
ÀúÀÚ(Author) |
·ù¿ì¼®
Wooseok Ryu
È«ºÀÈñ
Bonghee Hong
ÃÖº´¿î
Ryuan Choi
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¿ø¹®¼ö·Ïó(Citation) |
VOL 25 NO. 02 PP. 0049 ~ 0065 (2009. 08) |
Çѱ۳»¿ë (Korean Abstract) |
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¿µ¹®³»¿ë (English Abstract) |
The RFID tag provides additional memory to store various information about the tagged item. The application can get business specific information more efficiently by accessing tag memory data without accessing global network. However, RFID system uses wireless network between the reader and the tag, communication message between middleware and tag would be lost because of interferences. If the message is missed during tag writing, middleware cannot determine whether tag information was updated or not. To solve this problem, we define UNSURE state for message loss during writing operation and propose protocol to handle UNSURE state. If a reader doesn¡¯t receive reply from the tag, it generates UNSURE and middleware repeat writing until tag was not observed or succeed. When application terminates transaction, middleware determines whether transaction has unsure operation or not. If transaction has unsure operation, transaction would be pre committed and transaction remains as state of ¡®PRECOMMIT¡¯. When tag, which is in UNSURE_LIST, would be observed after pre committed, middleware continue previous operation and solve the state of UNSURE. If transaction doesn¡¯t have operation of UNSURE state, transaction would be committed.
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Å°¿öµå(Keyword) |
RFID
±â·Ï
Æ®·£Àè¼Ç
ÇÁ·ÎÅäÄÝ
writing
transaction
protocol
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ÆÄÀÏ÷ºÎ |
PDF ´Ù¿î·Îµå
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