DocumentCode :
2026045
Title :
Decoupling packet loss from blocking in proactive reservation-based switching
Author :
Elhaddad, Mahmoud ; Melhem, Rami ; Znati, Taieb
Author_Institution :
Dept. of Comput. Sci., Pittsburgh Univ., PA, USA
fYear :
2004
fDate :
25-29 Oct. 2004
Firstpage :
92
Lastpage :
101
Abstract :
We consider the maximization of network throughput in buffer-constrained optical networks using aggregate bandwidth allocation and reservation-based transmission control. Assuming that all flows are subject to loss-based TCP congestion control, we quantify the effects of buffer capacity constraints on bandwidth utilization efficiency through contention-induced packet loss. The analysis shows that the ability of TCP flows to efficiently utilize successful reservations is highly sensitive to the available buffer capacity. Maximizing the bandwidth utilization efficiency under buffer capacity constraints thus requires decoupling packet loss from contention-induced blocking of transmission requests. We describe a confirmed (two-way) reservation scheme that eliminates contention-induced loss, so that no packets are dropped at the network´s core, and loss can be incurred only at the adequately buffer-provisioned ingress routers, where it is exclusively congestion-induced. For the confirmed signaling scheme, analytical and simulation results indicate that TCP aggregates are able to efficiently utilize the successful reservations independently of buffer constraints.
Keywords :
bandwidth allocation; buffer storage; optical fibre networks; optimisation; telecommunication congestion control; telecommunication network routing; telecommunication signalling; telecommunication switching; transport protocols; aggregate bandwidth allocation; bandwidth utilization efficiency; buffer capacity; buffer-constrained optical network; buffer-provisioned ingress router; confirmed reservation scheme; confirmed signaling scheme; contention-induced blocking; contention-induced packet loss; decoupling packet loss; loss-based TCP congestion control; network throughput maximization; proactive reservation-based switching; reservation-based transmission control; Aggregates; Bandwidth; Channel allocation; Optical buffering; Optical control; Optical fiber networks; Optical losses; Optical packet switching; Packet switching; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Broadband Networks, 2004. BroadNets 2004. Proceedings. First International Conference on
Print_ISBN :
0-7695-2221-1
Type :
conf
DOI :
10.1109/BROADNETS.2004.28
Filename :
1363794
Link To Document :
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