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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 :

ÇѱÛÁ¦¸ñ(Korean Title) OFDMA ½Ã½ºÅÛ »óÇâ ¸µÅ©¿¡¼­, ÀÓÀÇ Á¢±Ù ä³ÎÀÇ Â÷º°È­µÈ ¼­ºñ½º Ç°Áú Á¦°øÀ» À§ÇÑ Backoff±â¹Ý ÀÓÀÇ Á¢±Ù ¾Ë°í¸®Áò ¹× ±× ¼º´É ºÐ¼®
¿µ¹®Á¦¸ñ(English Title) Backoff-based random access algorithm for offering differentiated QoS services in the random access channels of OFDMA systems
ÀúÀÚ(Author) ÀÌ¿µµÎ   ±¸Àμö   Young-du Lee   Insoo Koo  
¿ø¹®¼ö·Ïó(Citation) VOL 12 NO. 02 PP. 0360 ~ 0368 (2008. 02)
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(Korean Abstract)
º» ³í¹®¿¡¼­´Â ´ÙÁß ¼­ºñ½º ´ÙÁß »ç¿ëÀÚ OFDMA ½Ã½ºÅÛÀÇ ÀÓÀÇ Á¢±Ùä³Î¿¡¼­ Â÷º°È­µÈ ¼­ºñ½º Ç°ÁúÀ» Á¦°øÇϱâ À§ÇÏ¿© backoff±â¹Ý ÀÓÀÇ Á¢±Ù ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÏ°í, ÀÓÀÇ Á¢±Ù ä³ÎÀÇ ÁÖ ÀÚ¿øÀÎ ºÎä³ÎÀÇ ¼ö¿Í PN-ÄÚµåÀÇ ¼ö°¡ ÁÖ¾îÁø °æ¿ì, Á¦¾ÈµÈ ¾Ë°í¸®ÁòÀÇ ¼º´ÉÀ» °¢ ¼­ºñ½º Ŭ·¡½º Á¢¼Ó È®·üÀÇ ÇÔ¼ö·Î¼­, °¢ ¼­ºñ½º Ŭ·¡½ºÀÇ Á¢¼Ó ¼º°ø È®·ü, ó¸®À², ºí·ÎÅ· È®·ü, Á¢¼Ó Áö¿¬°üÁ¡¿¡¼­ ºÐ¼®ÇÑ´Ù. ¼öÄ¡Àû ºÐ¼®À» ÅëÇÏ¿© Á¦¾ÈµÈ backoff ±â¹Ý ÀÓÀÇ Á¢±Ù ¾Ë°í¸®ÁòÀÌ ¼­·Î ´Ù¸¥ ¼­ºñ½º Ŭ·¡½ºÀÇ ÀÓÀÇÁ¢±Ù ½Ãµµµé¿¡°Ô Â÷µîÇÑ ¼­ºñ½º Ç°ÁúÀ» Á¦°øÇÒ ¼ö ÀÖÀ½À» º¸¿´´Ù.
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(English Abstract)
In this paper, in order that the various QoS(Quality of Service)s that are required by different traffic class are guaranteed in the random access channels in multi-service multi-user OFDMA systems, the backoff-based random access algorithm is proposed and corresponding performance is analyzed in terms of the access success probability, the throughput, the average delay and the blocking probability. Through the numerical analysis, it is shown that the proposed backoff-based random access algorithm can provide the differentiated QoSs to random access attempts according to their service class.
Å°¿öµå(Keyword) OFDMA   back-off based random access   Quality of Service (QoS)  
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