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Design of a crossbar VOQ real-time switch with clock-driven scheduling for a guaranteed delay bound
- Design of a crossbar VOQ real-time switch with clock-driven scheduling for a guaranteed delay bound
- Kang, Kyungtae; Park, Kyung-Joon; Sha, Lui; Wang, Qixin
- DGIST Authors
- Park, Kyung-Joon
- Issue Date
- Real: Time Systems, 49(1), 117-135
- Article Type
- Average Throughput; Bounded Delay; Bounded Delays; Clock-Driven Scheduling; Clocks; Commercial Networks; Crossbar Switching; Guaranteed Delay Bound; Real-Time Switch; Schedulability Analysis; Scheduling; System Operation; Time Switches; Virtual Machines
- 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. © 2012 Springer Science+Business Media New York.
- Related Researcher
CSI(Cyber-Physical Systems Integration) Lab
Cyber-Physical Systems; 무선 센서-액츄에이터 네트워크; 스마트 팩토리
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- Department of Information and Communication EngineeringCSI(Cyber-Physical Systems Integration) Lab1. Journal Articles
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