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ÇѱÛÁ¦¸ñ(Korean Title)
µð½ºÅ© Àü¼Û·ü°ú ¹öÆÛ Å©±â¸¦ µ¿½Ã¿¡ °í·ÁÇÑ È¿À²Àû ¼ö¿ëÁ¦¾î ±â¹ý
¿µ¹®Á¦¸ñ(English Title)
An Effective Admission Control Mechanism considering both Disk Bandwidth and Buffer Size
ÀúÀÚ(Author)
ÀÌ°æ¿À
¿°Ç念
Kyung Oh Lee
Heon Young Yeom
¿ø¹®¼ö·Ïó(Citation)
VOL 24 NO. 08 PP. 0731 ~ 0740 (1997. 08)
Çѱ۳»¿ë
(Korean Abstract)
¸ÖƼ¹Ìµð¾î¸¦ ½Ç½Ã°£À¸·Î ¼ºñ½ºÇÏ´Â ½Ã½ºÅÛ¿¡¼ ¼ö¿ëÁ¦¾î¸¦ Çϱâ À§Çؼ´Â ³×Æ®¿öÅ© °¡¿ë´É·Â, ¹öÆÛ °ø°£ ¹× µð½ºÅ© Àü¼Û·ü µîÀÌ °í·ÁµÇ¾î¾ß Çϸç ƯÈ÷ ¹öÆÛ °ø°£°ú µð½ºÅ© Àü¼Û·üÀº ¼·Î ¸¹Àº ¿µÇâÀ» ¹ÌÄ¡±â ¶§¹®¿¡ µ¿½Ã¿¡ °í·ÁµÇ¾î¾ß ÇÑ´Ù. ±âÁ¸ ¿¬±¸¿¡¼´Â CBRÀ» ±Ù°£À¸·Î ÇÏ¿© ¹öÆÛ °ø°£ÀÇ µð½ºÅ© Àü¼Û·üÀ» µ¿½Ã¿¡ °í·ÁÇÏ´Â ±â¹ýÀÌ Á¦½ÃµÇ¾úÁö¸¸ VOD ½Ã½ºÅÛ¿¡¼´Â º¸Åë MPEG µ¥ÀÌŸ°¡ VBR Çü½ÄÀ¸·Î µÇ¾îÀֱ⠶§¹®¿¡ ¼ö¿ë Á¦¾î ½Ã¿¡´Â CBR·Î µ¥ÀÌŸ¸¦ ¸ðµ¨¸µÇÏ¸é ½Ã½ºÅÛÀÇ °¡¿ë¼ºÀÌ ¶³¾îÁö°Ô µÈ´Ù. ¶ÇÇÑ ¼ö¿ëÁ¦¾î¸¦ À§ÇÑ ¹öÆÛ ¿¹¾à±â¹ý¿¡¼´Â VBR ÇüÅ·Πµ¥ÀÌŸ¸¦ ¸ðµ¨¸µÇÏ´Â ±â¹ýµéÀÌ Á¦½ÃµÇ¾úÁö¸¸ ÀÌ °æ¿ì¿¡µµ µð½ºÅ© Àü¼Û·üÀ» °è»êÇÒ ¶§´Â CBR Çü½ÄÀ¸·Î °¡Á¤À» Çϰųª ¾Æ¿¹ °í·Á¸¦ ÇÏÁö ¾Ê±â ¶§¹®¿¡ ¿ª½Ã ½Ã½ºÅÛ ÀÚ¿øÀ» È¿À²ÀûÀ¸·Î »ç¿ëÇÒ ¼ö°¡ ¾ø¾ú´Ù. º» ³í¹®¿¡¼´Â µð½ºÅ© Àü¼Û·ü°ú ¹öÆÛ Å©±â¸¦ µ¿½Ã¿¡ °í·ÁÇÏ¸é¼ VBRÀÇ Æ¯¼ºÀ» »ì·Á¼ ¼ö¿ëÁ¦¾î¸¦ ½Ç½ÃÇÏ´Â ±â¹ýÀ» Á¦½ÃÇÏ¿´´Ù. ÀÌ ±â¹ý¿¡¼ ¾à°£ÀÇ ÀÚ¿øÀ» ¿¹ºñ·Î »ç¿ëÇÏ¿© ºñ ½Ç½Ã°£ ÀÛ¾÷À» ¼ºñ½ºÇϰųª ½ºÅ¸º£À̼Ç(Starvation)À̳ª ¿À¹öÇ÷Î(Overflow) µîÀÌ ¹ß»ýÇÏÁö ¾Êµµ·Ï ÇÏ¿´´Ù. ÀÌ ±â¹ýÀº CBR ±â¹ýÀ» »ç¿ëÇÏ´Â °æ¿ìº¸´Ù ¾à 2¹èÀÇ »ç¿ëÀÚ¸¦ ¼ö¿ëÇÒ ¼ö°¡ ÀÖÀ½À» ½ÇÇèÀ» ÅëÇØ º¸¿´´Ù.
¿µ¹®³»¿ë
(English Abstract)
For the admission control of real time multimedia service system, we must consider network bandwidth, buffer space and disk bandwidth. As buffer space and disk bandwidth affect each other tightly, they should be considered at the same time. There are earlier works on the admission control mechanism considering both buffer space and disk bandwidth based on CBR data modeling. Because media data are encoded with VBR compression techniques such as MPEG standard, CBR data modeling makes system utilization low. Earlier works on the buffer management using VBR data modeling either assume that data are retrieved from the disk by CBR scheme or they don't consider the disk bandwidth at all, so it makes system ineffective. In order to solve this problem, we suggest an admission control mechanism considering both disk bandwidth and buffer space, based on VBR data modeling. This mechanism reserves some fraction of resource to prevent starvation and overflow, and it can be used for the non-real time works. We showed that this mechanism can accept about twice streams as CBR technique does via a proper simulation.
Å°¿öµå(Keyword)
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