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ÇѱÛÁ¦¸ñ(Korean Title) |
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¿µ¹®Á¦¸ñ(English Title) |
A Packet Loss Recovery Algorithm for Tree-based Mobile Multicast |
ÀúÀÚ(Author) |
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¿ø¹®¼ö·Ïó(Citation) |
VOL 30 NO. 03 PP. 0343 ~ 0354 (2003. 06) |
Çѱ۳»¿ë (Korean Abstract) |
º» ³í¹®¿¡¼´Â ¸ÖƼij½ºÆ® ȯ°æ¿¡¼ ÇÚµå¿ÀÇÁ ½Ã ¹ß»ýÇÏ´Â ÆÐŶ¼Õ½ÇÀÇ È¸º¹ Áö¿¬½Ã°£À» ÃÖ¼ÒÈÇÏ´Â ¾Ë°í¸®ÁòÀ» Á¦¾ÈÇÏ¿´´Ù. Á¦¾ÈÇÑ ¾Ë°í¸®ÁòÀº ¼±Çà ¿¬±¸ÀÎ PMTP(Predictable Multicast Protocol)¿Í FN(Foreign Network)°£ÀÇ ¿¬°è¸¦ ÅëÇØ ½Å·Ú¼ºÀ» º¸ÀåÇϸç, À̵¿ÇÑ ¿ÜºÎ³×Æ®¿öÅ©ÀÇ FA(Foreign Agent)ÀÇ »óÅ¿¡ µû¶ó Åͳθµ°ú ¸ÖƼij½ºÆ® ±×·ì Àç °¡ÀÔÀ» »ç¿ëÇÏ¿© ¾ç¹æÇâ(bi-directional tunneling)°ú ¿ø°Ý°¡ÀÔ(remote subscription)À» µ¶¸³ÀûÀ¸·Î »ç¿ëÇÏ´Â °æ¿ì¿¡ ¹ß»ýµÇ´Â ¶ó¿ìÆÃÀÇ ºñÈ¿À²¼º°ú ÇÚµå¿ÀÇÁ Áö¿¬À» ÇØ°áÇÏ¿´´Ù. ÇÑÆí, ÇÚµå¿ÀÇÁ Áö¿¬¿¡ ÀÇÇØ ¹ß»ýµÇ´Â ÆÐŶ¼Õ½ÇÀ» ÇÚµå¿ÀÇÁ ½Ã µî·ÏÁ¤º¸¿Í ¼Õ½ÇµÈ ÆÐŶ Á¤º¸¸¦ ÇÔ²² Àü¼ÛÇÏ¿© ÀÌÀü FA³ª ÇöÀç FA°¡ ÇÚµå¿ÀÇÁ ¼öÇà°ú µ¿½Ã¿¡ ÇÚµå¿ÀÇÁ Áö¿¬µ¿¾ÈÀÇ ÆÐŶ¼Õ½ÇÀ» ÃÖ¼ÒÇÑÀÇ ½Ã°£¿¡ ȸº¹ÇÒ ¼ö ÀÖµµ·Ï ÇÑ´Ù. ¼º´ÉºÐ¼® °á°ú, Á¦¾ÈÇÏ´Â ¹æ½ÄÀº ±âÁ¸ÀÇ ÇÚµå¿ÀÇÁ ÀýÂ÷¿¡ Ãß°¡ º¯°æ ¾øÀÌ »ç¿ë °¡´ÉÇÏ¸ç ¾ç¹æÇâ ¹æ½Ä°ú ¿ø°Ý°¡ÀÔ ¹æ½Äº¸´Ù ÇÚµå¿ÀÇÁ¿Í ¿¡·¯È¸º¹ ½Ã°£¿¡ ÀÖ¾î ³ôÀº ¼º´ÉÀ» º¸ÀÌ´Â °ÍÀ» È®ÀÎÇÏ¿´´Ù.
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¿µ¹®³»¿ë (English Abstract) |
This paper describes algorithm that minimizes recovery time of packet loss resulting from handoff in multicast environments and guarantees reliability through interaction of FN(Foreign Network) with PMTP(Predictable Multicast Tree Protocol). To solve the problems that inefficient routing and handoff delay taking place when using bi-directional tunneling and remote-subscription independently in multicast environments, proposed algorithm uses tunneling and rejoining multicast group according to the status of an arriving FA in a foreign network. Furthermore, proposed algorithm sends packet loss information and register message to previous FA or current FA at the same time. so, MH is able to recovery packet loss in handoff delay as soon as possible. As a result of performance analysis, proposed algorithm is more efficient than previous researches and is applicable to existing handoff method without requiring additional procedures.
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