Managing congestion in DBS networks
18th International Communications Satellite Systems Conference and Exhibit, ICSSC 2000, Oakland, CA, Amerika Birleşik Devletleri, 10 - 14 Nisan 2000, ss.559-568, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.2514/6.2000-1241
- Basıldığı Şehir: Oakland, CA
- Basıldığı Ülke: Amerika Birleşik Devletleri
- Sayfa Sayıları: ss.559-568
- Boğaziçi Üniversitesi Adresli: Hayır
Özet
This paper presents an adaptive control approach for managing congestion in Direct Broadcast Satellite (DBS) netwoiks -with Variable Bit Rate (VBR) traffic, e.g., MPEG video, with other data traffic having available bit rate (ABR) traffic requirements. The system concept is based on an asymmetric architecture with the high capacity forward link provided by the DBS and the low speed return link is provided by a constellation of Low Earth Orbiting (LEO) satellites. The new feature introduced in this paper is a distributed control mechanism based on the use of watermarks to detect congestion in the network and make independent adjustments in both the VBR and ABR traffic rates. Because all traffic converges in the uplink router in this system concept, the watermark is measured as the uplink queue utilization in this router. The router will periodically multicast its "uplink queue watermark" over a network management socket to all of the source system hosts generating ABR and VBR traffic. When these hosts receive a watermark message on the net management socket, they will independently adjust their transmission rate according to its watermark action table. © 2000 by the American Institute of Aeronautics and Astronautics, Inc. AH rights reserved.