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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)

Current Result Document : 5 / 35 ÀÌÀü°Ç ÀÌÀü°Ç   ´ÙÀ½°Ç ´ÙÀ½°Ç

ÇѱÛÁ¦¸ñ(Korean Title) À§¼ºÅ¾Àç CICQ Crossbar Switch¿¡¼­ COS Áö¿øÀ» À§ÇÑ ÇÁ¸®¹Ì¾ö±â¹Ý ¿ì¼±¼øÀ§ Scheduler ±â¹ý
¿µ¹®Á¦¸ñ(English Title) A Scheduling Scheme based on Premium to Support COS(Class of Service) for Satellite On-Board CICQ(Combined Input-Crosspoint Queueing) Crossbar Switch
ÀúÀÚ(Author) °ø³²¼ö   ·ù±ÙÈ£   À̱ÔÈ£   Nam-Soo Kong   Keun Ho Ryu   Kyou-Ho Lee  
¿ø¹®¼ö·Ïó(Citation) VOL 13 NO. 06 PP. 1065 ~ 1071 (2009. 06)
Çѱ۳»¿ë
(Korean Abstract)
À§¼ºÀ» ÅëÇÑ Åë½Å ¼­ºñ½º´Â À½¼º Åë½Å ¼­ºñ½º¿Í °°Àº ½Ç½Ã°£ ÀÀ¿ë ¼­ºñ½º¿Í µ¥ÀÌÅÍ Åë½Å°ú °°Àº ºñ½Ç½Ã°£ ÀÀ¿ë ¼­ºñ½º°¡ ÇÔ²² Á¦°øµÇ´Â °ÍÀÌ ÀϹÝÀûÀÌ´Ù. À§¼ºÀ» ÅëÇÏ¿© Ư¼ºÀ» ´Þ¸®ÇÏ´Â ¿©·¯ °³ÀÇ ÀÀ¿ë ¼­ºñ½º¸¦ ÇÔ²² Á¦°øÇϱâ À§Çؼ­´Â ¼­ºñ½ºÀÇ Å¬·¡½º(COS: Class of Service)¿¡ µû¶ó ¿ì¼±¼øÀ§¸¦ ´Þ¸®ÇÏ´Â ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µÀÌ ÇÊ¿äÇÏ´Ù. ±×·¯³ª ±âÁ¸ÀÇ ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µ ±â¹ýÀº ¿ì¼±¼øÀ§°¡ ³·À» °æ¿ì, ¼­ºñ½º¸¦ ¹ÞÁö ¸øÇÏ´Â ±¾ÁÖ¸²(Starvation) Çö»óÀÌ ¹ß»ýÇÏ´Â ¹®Á¦Á¡ÀÌ ÀÖ¾ú´Ù. º» ³í¹®¿¡¼­´Â COS¿¡ µû¶ó °¢±â ´Ù¸¥ ÇÁ¸®¹Ì¾öÀ» ÁÖ°í, ½ºÄÉÁÙ¸µÀ» ¹ÞÁö ¸øÇÑ ÆÐŶÀº Age¸¦ Áõ°¡½ÃÄÑ °¡¸é¼­, Age¿Í ÇÁ¸®¹Ì¾öÀÇ ÇÕÀÌ °¡Àå Å« ÆÐŶÀ» ¼±ÅÃÇÏ´Â ÇÁ¸®¹Ì¾ö ±â¹Ý ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µ ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. Á¦¾ÈÇÑ ½ºÄÉÁÙ¸µ ±â¹ýÀº °íÁ¤ ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µ ±â¹ý¿¡ ºñÇÏ¿© ¿ì¼±¼øÀ§°¡ ³·Àº ¼­ºñ½º¿¡ À־ Æò±ÕÁö¿¬½Ã°£ÀÌ °³¼±µÇ¾ú°í, Áö¿¬½Ã°£¿¡ ´ëÇÑ Ç¥ÁØÆíÂ÷¿¡ À־µµ ±âÁ¸ÀÇ °íÁ¤ ¿ì¼±¼øÀ§ ±â¹ý¿¡ ºñÇÏ¿© °³¼±µÇ¾úÀ½À» º¸¿© ÁÖ¾ú´Ù. Á¦¾ÈÇÑ ÇÁ¸®¹Ì¾ö ±â¹Ý ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µ ±â¹ý¿¡¼­´Â ±âÁ¸ÀÇ °íÁ¤ ¿ì¼±¼øÀ§ ½ºÄÉÁÙ¸µ ±â¹ý¿¡¼­¿Í °°Àº ¹«ÇÑÁ¤ ±¾ÁÖ¸² »óÅ°¡ µÇÁö ¾Ê´Â´Ù.
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(English Abstract)
Satellite application services can be divided into realtime services like voice communications and non-real time services like traditional data communications. To support both types of services on the same On-Board Switching(OBS), a scheduler which depends on their service classes is required. A fixed priority scheduling policy has a starvation problem. In this paper we propose a scheduling scheme based on premium and age. Premium is a fixed value which is given to a certain class of services. Age is another parameter of the scheduling policy and it will be increased by one for every scheduling cycle. The scheme we propose chooses a packet which has the largest sum of its age and premium. Simulation results indicate that the proposed approach shows better performance in both average cell delay and std-dev of cell delay for the lower class of service. There is no staying in infinite starvation state.
Å°¿öµå(Keyword) Scheduler   Priority Scheduler   On-Board Switch   CICQ Switch Scheduler   Class of Service  
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