| Presentation | 2006/10/12 ELB in IP/NGEO Satellite Constellations : Issues and Solutions(Advanced Technology-I) Daisuke MASHIMO, Tarik TALEB, Kazuo HASHIMOTO, Yoshiaki NEMOTO, Nei KATO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To ensure an intelligent engineering of traffic over satellite networks, the authors have recently proposed a routing protocol dubbed Explicit Load Balancing (ELB). The protocol enables neighboring satellites to explicitly exchange information on their congestion status. A satellite that is about to get congested requests its neighboring satellites to decrease their data forwarding rates. In response, the neighboring satellites search for less congested paths that do not include the satellite in question and communicate a portion of data, primarily destined to the satellite, via the retrieved paths. While transmitting packets of the same flow over different links helps to better distribute the traffic over the satellite constellation, and accordingly alleviates congestion and avoids packet drops, it leads to the reception of packets in an out-of-order manner at the receiver side. In case of TCP, this phenomenon results in the transmission of duplicate acknowledgments, unnecessarily halves the congestion window of TCP, and ultimately degrades the throughput. As a remedy to this issue, we suggest that receivers refer to the Time-to-Live (TTL) field of packet headers to judge whether the out of order in the reception of packets is due to congestion or simply to changes in the communication path. Furthermore, as packets have to traverse more hops in ELB, delay-sensitive applications may get affected by the extra delay due to hops. To cope with such an issue, we consider the use of differentiated services we classify users into a number of classes, namely delay sensitive, throughput-sensitive, and best effort. Via simulations, we demonstrate the efficiency of ELB in such environments. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | NGEO satellite network / routing protocol / traffic distribution / TCP / DiffServ |
| Paper # | SAT2006-20 |
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| Committee | SAT |
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| Conference Date | 2006/10/12(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Satellite Telecommunications (SAT) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | ELB in IP/NGEO Satellite Constellations : Issues and Solutions(Advanced Technology-I) |
| Sub Title (in English) | |
| Keyword(1) | NGEO satellite network |
| Keyword(2) | routing protocol |
| Keyword(3) | traffic distribution |
| Keyword(4) | TCP |
| Keyword(5) | DiffServ |
| 1st Author's Name | Daisuke MASHIMO |
| 1st Author's Affiliation | Graduate School of Information Sciences, Tohoku University() |
| 2nd Author's Name | Tarik TALEB |
| 2nd Author's Affiliation | Graduate School of Information Sciences, Tohoku University |
| 3rd Author's Name | Kazuo HASHIMOTO |
| 3rd Author's Affiliation | Graduate School of Information Sciences, Tohoku University |
| 4th Author's Name | Yoshiaki NEMOTO |
| 4th Author's Affiliation | Graduate School of Information Sciences, Tohoku University |
| 5th Author's Name | Nei KATO |
| 5th Author's Affiliation | Graduate School of Information Sciences, Tohoku University |
| Date | 2006/10/12 |
| Paper # | SAT2006-20 |
| Volume (vol) | vol.106 |
| Number (no) | 303 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |