DocumentCode :
1991300
Title :
Asynchronous vs Synchronous Input-Queued Switches
Author :
Bianco, Andrea ; Cuda, Davide ; Giaccone, Paolo ; Neri, Fabio
Author_Institution :
Dipt. di Elettron., Politec. di Torino, Torino, Italy
fYear :
2010
fDate :
6-10 Dec. 2010
Firstpage :
1
Lastpage :
5
Abstract :
Input-queued (IQ) switches are one of the reference architectures for the design of high-speed packet switches. Classical results in this field refer to the scenario in which the whole switch transfers the packets in a synchronous fashion, in phase with a sequence of fixed-size timeslots, selected to transport a minimum-size packet. However, for switches with large number of ports and high bandwidth, maintaining an accurate global synchronization and transferring all the packets in a synchronous fashion is becoming more and more challenging. Furthermore, variable size packets (as in the traffic present in the Internet) require rather complex segmentation and reassembly processes and some switching capacity is lost due to partial filling of timeslots. Thus, we consider a switch able to natively transfer packets in an asynchronous fashion thanks to a simple and distributed packet scheduler. We investigate the performance of asynchronous IQ switches and show that, despite their simplicity, their performance are comparable or even better than those of synchronous switches. These partly unexpected results highlight the great potentiality of the asynchronous approach for the design of high-performance switches.
Keywords :
packet switching; queueing theory; telecommunication switching; asynchronous input queued switch; complex segmentation; high speed packet switch; reassembly process; synchronous input queued switche; variable size packet; Computer architecture; Delay; Fabrics; Microprocessors; Scheduling algorithm; Switches; Throughput;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2010), 2010 IEEE
Conference_Location :
Miami, FL
ISSN :
1930-529X
Print_ISBN :
978-1-4244-5636-9
Electronic_ISBN :
1930-529X
Type :
conf
DOI :
10.1109/GLOCOM.2010.5683642
Filename :
5683642
Link To Document :
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