Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/8284
Title: Design of a crossbar VOQ real-time switch with clock-driven scheduling for a guaranteed delay bound
Authors: Kang, K
Park, KJ
Sha, L
Wang, Q 
Keywords: Bounded delay
Clock-driven scheduling
Real-time switch
Schedulability analysis
Issue Date: 2013
Publisher: Springer
Source: Real-time systems, 2013, v. 49, no. 1, p. 117-135 How to cite?
Journal: Real-Time Systems 
Abstract: Most commercial network switches are designed to achieve good average throughput and delay needed for Internet traffic, whereas hard real-time applications demand a bounded delay. Our real-time switch combines clearance-time-optimal switching with clock-based scheduling on a crossbar switching fabric. We use real-time virtual machine tasks to serve both periodic and aperiodic traffic, which simplifies analysis and provides isolation from other system operations. We can then show that any feasible traffic will be switched in two clock periods. This delay bound is enabled by introducing one-shot traffic, which can be constructed at the cost of a fixed delay of one clock period. We carry out simulation to compare our switch with the popular iSLIP crossbar switch scheduler. Our switch has a larger schedulability region, a bounded lower end-to-end switching delay, and a shorter clearance time which is the time required to serve every packet in the system.
URI: http://hdl.handle.net/10397/8284
ISSN: 0922-6443
DOI: 10.1007/s11241-012-9169-6
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