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ÇѱÛÁ¦¸ñ(Korean Title) |
¹«¼± Ŭ¶óÀ̾ðÆ®-¼¹ö ȯ°æ¿¡¼ À̵¿ Ŭ¶óÀ̾ðÆ®ÀÇ Ä³½Ã µ¥ÀÌŸ Àç»ç¿ëÀ² Çâ»ó±â¹ý |
¿µ¹®Á¦¸ñ(English Title) |
Increasing a Mobile Client's Cache Reusability in Wireless Client-Server Environments |
ÀúÀÚ(Author) |
À̼ÛÀÌ
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¿ø¹®¼ö·Ïó(Citation) |
VOL 33 NO. 05 PP. 0282 ~ 0296 (2006. 06) |
Çѱ۳»¿ë (Korean Abstract) |
¹«¼± Ŭ¶óÀ̾ðÆ®-¼¹ö ȯ°æ¿¡¼ µ¥ÀÌŸ ºê·Îµåij½ºÆÃÀº È¿À²ÀûÀÎ µ¥ÀÌŸ º¸±Þ¹æ½ÄÀÌ´Ù. ¼¹ö°¡ µ¥ÀÌŸ¸¦ ¹æ¼ÛÇÏ¸é ±× Áß ÀϺθ¦ Ŭ¶óÀ̾ðÆ®°¡ ij½Ã¿¡ º¸°üÇÏ¿©, ³·Àº Åë½Å ´ë¿ªÆø°ú ÇÑÁ¤µÈ ÀÚ¿øÀ» ±Øº¹ÇÏ°í µ¥ÀÌŸ Á¢±Ù ½Ã°£ µîÀ» Àý¾àÇÒ ¼ö ÀÖ´Ù. ¼¹ö´Â ¶ÇÇÑ ¹«È¿Èº¸°í¼¸¦ ¹æ¼ÛÇÏ¿© ¼¹ö µ¥ÀÌŸ¿Í Ŭ¶óÀ̾ðÆ®°¡ ij½ÌÇÑ µ¥ÀÌŸ°£ÀÇ ÀÏ°ü¼ºÀ» À¯ÁöÇÒ ¼ö ÀÖµµ·Ï ÇÑ´Ù. ±âÁ¸ÀÇ Ä³½Ã ÀÏ°ü¼º ¹®Á¦¸¦ ÇØ°áÇϱâ À§ÇÑ ´ëºÎºÐÀÇ ¿¬±¸´Â, Á¢¼Ó ´ÜÀý ½Ã°£ÀÌ ³Ê¹« ±æ¾î¼ ¼ö½ÅÇÏÁö ¸øÇÑ ¹«È¿È º¸°í¼ÀÇ ¼ö°¡ ÀÏÁ¤ Çѵµ(À©µµ¿ì Å©±â)¸¦ ³ÑÀ¸¸é ´Ü¼øÈ÷ ij½Ã Àüü¸¦ »èÁ¦ÇÏ´Â ¹æ¹ýÀ» »ç¿ëÇÑ´Ù. ÀÌ ³í¹®Àº ÀÌ·¯ÇÑ ±ä Á¢¼Ó ´ÜÀý ½Ã°£ÀÇ °æ¿ì¿¡µµ À̵¿ Ŭ¶óÀ̾ðÆ®ÀÇ Ä³½Ã Àç»ç¿ëÀ²À» ³ôÀÏ ¼ö ÀÖ´Â ±â¹ýÀ» Á¦½ÃÇÑ´Ù. ij½ÃÀÇ ÀÏ°ü¼º ¿©ºÎ¿¡ °ü°è¾øÀÌ ¹«Á¶°Ç Àüü ij½Ã ³»¿ëÀ» Áö¿ì´Â ´ë½Å, Ŭ¶óÀ̾ðÆ®´Â ¸ðµç µ¥ÀÌŸ¸¦ Áö¿ì´Â ºñ¿ë°ú ¼±ÅÃÀûÀ¸·Î Áö¿ì´Â ºñ¿ëÀ» ÃßÃøÇÑ´Ù. ¸¸ÀÏ ¸ðµç µ¥ÀÌŸ¸¦ Áö¿ì´Â ºñ¿ëÀÌ ³ô¾ÆÁö´Â °æ¿ì¿¡´Â Ŭ¶óÀ̾ðÆ®´Â ij½Ã¸¦ À¯ÁöÇÏ°í °ËÁõ ¿äûÀ» À§ÇØ ¾÷¸µÅ©¸¦ »ç¿ëÇÏ¿© À¯È¿ÇÏÁö ¾ÊÀº µ¥ÀÌŸ¸¸À» ¼±ÅÃÀûÀ¸·Î Áö¿î´Ù. ÀÌ ¹æ¹ýÀº ij½Ã À¯Áö ºñ¿ëÀ» ÃßÃøÇÒ ¶§ ij½ÃµÈ µ¥ÀÌŸÀÇ °»½Å ºñÀ²°ú ¹æ¼Û ºóµµµéÀ» ÇÔ²² °í·ÁÇϹǷÎ, È¿À²ÀûÀ¸·Î ij½Ã Àç»ç¿ëÀ²À» ³ôÀÏ ¼ö ÀÖ´Ù´Â °ÍÀ» ¸ðÀÇ ½ÇÇè °á°ú¸¦ ÅëÇØ Áõ¸íÇÑ´Ù. |
¿µ¹®³»¿ë (English Abstract) |
In a wireless client server environment, data broadcasting is an efficient data dissemination method; a server broadcasts data, and some of broadcasted data are cached in a mobile client's cache to save the narrow communication bandwidth, limited resources, and data access time. A server also broadcasts invalidation reports to maintain the consistency between server data and a client's cached data. Most of existing works on the cache consistency problems simply purge the entire cache when the disconnection time is long enough to miss the certain amount(window size) of IRs. This paper presents a cache invalidation method to increase mobile clients' cache reusability in case of a long disconnection. Instead of simply dropping the entire cache regardless of its consistency, a client estimates the cost of purging all the data with the cost of selective purge. If the cost of dropping entire cache is higher, a client maintains the cache and selectively purge inconsistent data using uplink bandwidth for validation request. The simulation results show that this scheme increases the cache reusability since it effectively considers the update rates and the broadcast frequencies of cached data in estimating the cost of cache maintenance. |
Å°¿öµå(Keyword) |
¹«¼± Ŭ¶óÀ̾ðÆ® ¼¹ö ȯ°æ
wireless client-server environment
µ¥ÀÌŸ ºê·Îµåij½ºÆ®
data broadcast
ij½Ã ÀÏ°ü¼º
cache consistency
¹«È¿È º¸°í¼
invalidation report
ij½Ã Àç»ç¿ëÀ²
cache reusability
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