Static dispatching with internal backpressure scheme for SMM Clos-network switches

Kleban, Janusz; Suszynska, Urszula

doi:10.1109/iscc.2013.6755022

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…In this section, we will present models of interstage and overflow links as well as groups of output links of the switching network. These models will be then used to evaluate the value of effective availability of the switching network for particular call classes (function in dependencies (2), (6), and (14)) and external blocking probabilities (function in dependencies (4), (8), and (16)), internal blocking probabilities (formulas (1) and (15)), and total blocking probabilities (formulas (5), (10), and (17)).…”

Section: Models Of Interstage Overflow and Output Links Of The Switmentioning

confidence: 99%

“…Switching networks are the most important element of network nodes and significantly influence the effectiveness of telecommunication networks. Switching networks can be divided into nonblocking and blocking networks [1][2][3][4][5][6][7]. In nonblocking networks, the phenomenon of internal blocking, manifested by the lack of any possibility of setting up a connection between a free input and a free output, is nonexistent [8].…”

Section: Introductionmentioning

confidence: 99%

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Multiservice Switching Networks with Overflow Links and Resource Reservation

Głąbowski

Stasiak

2016

Mathematical Problems in Engineering

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This paper proposes a new analytical model of a multiservice switching network with overflow links in the first stage and resource reservation for selected call classes in output directions. The proposed model assumes that both the overflow mechanism and the resource reservation mechanism can be used in a number of selected, or all, classes of calls. A particular attention is given to the way the effective availability parameter for networks with overflow links in the point-to-point selection mode is determined. The proposed model makes it possible to determine dependencies between the internal blocking probability, capacity of overflow links, and the number of reserved resources for call classes to be analysed. Simulation experiments confirm high accuracy of the proposed method and potential applications of the model in engineering issues.

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Section: Models Of Interstage Overflow and Output Links Of The Switmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiservice Switching Networks with Overflow Links and Resource Reservation

Głąbowski

Stasiak

2016

Mathematical Problems in Engineering

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“…In [13], different kinds of backpressure schemes between central modules and input modules are evaluated, in terms of maximum buffer usage in central modules. The packet dispatching scheme proposed in [14] uses static dispatching patterns and internal backpressure signals. It is dedicated for SMM Clos-network switches, where the second and third stages are made of crosspoint queued (CQ) switches [15].…”

Section: Introductionmentioning

confidence: 99%

“…It is an adaptation of the Static Round-Robin Dispatching (SRRD) to the SMM Clos-network switch, and is less demanding in terms of hardware, in comparison with other proposed schemes (e.g. [14]). The SD scheme does not need any special arbitration, e.g.…”

Section: Introductionmentioning

confidence: 99%

SMM Clos-Network Switches under SD Algorithm

Blaauboer¹,

Lenstra²,

Lodder³

2018

JTIT

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This paper is devoted to evaluating the performance of Space-Memory-Memory (SMM) Clos-network switches under a packet dispatching scheme employing static connection patterns, referred to as Static Dispatching (SD). The control algorithm with static connection patterns can be easily implemented in the SMM fabric due to bufferless switches in the first stage. Stability is one of the very important performance factors of packet switching nodes. In general, a switch is stable for a particular arrival process if the expected length of the packet queues does not increase without limitation. To prove the stability of the SMM Clos-network switches considered under the SD packet dispatching scheme the discrete Markov chain model of the switch is used and Foster’s criteria to extend Lyapunov’s second (direct) method of stability investigation of discrete time stochastic systems are used. The results of simulation experiments, in terms of average cell delay and packet queue lengths, are shown as well.

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“…When tested under real-trace traffic [10], CQ switches with a feasible crosspoint buffer size can realise a good performance using round robin (RR) or random scheduling algorithms. Based on the above advantages, more and more highspeed large-scale switches [11][12][13][14][15] have taken CQ switch into consideration to simplify the dispatching procedure.…”

Section: Introductionmentioning

confidence: 99%

Improved analytical model for performance evaluation of crosspoint‐queued switch under uniform traffic

2017

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In this study, a crosspoint-queued (CQ) switch that features a buffer size larger than one and employs the workconserving random scheduling algorithm under uniform Bernoulli i.i.d. traffic is investigated through both theoretical analysis and simulation. The effect of the crosspoint buffer state on switch performance is modelled and quantified. A novel method for calculating the throughput and delay of a CQ switch with a given switch size, input load, and buffer size is proposed. Compared with existing models, the proposed calculation model offers a simpler and more accurate result, and can serve as a theoretical guide in designing high-speed switch fabrics.

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Static dispatching with internal backpressure scheme for SMM Clos-network switches

Cited by 7 publications

References 7 publications

Multiservice Switching Networks with Overflow Links and Resource Reservation

Multiservice Switching Networks with Overflow Links and Resource Reservation

SMM Clos-Network Switches under SD Algorithm

Improved analytical model for performance evaluation of crosspoint‐queued switch under uniform traffic

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