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Record W2111418470 · doi:10.1109/glocom.2009.5426009

Emulation of Optical PIFO Buffers

2009· article· en· W2111418470 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldEngineering
TopicAdvanced Optical Network Technologies
Canadian institutionsUniversity of Toronto
Fundersnot available
KeywordsComputer scienceScheduling (production processes)EmulationFIFO and LIFO accountingQueueRouterQueueing theoryNetwork packetComputer networkFair queuingPacket switchingFIFO (computing and electronics)Optical switchPriority queueWeighted fair queueingSpeedupQueuing delayDistributed computingParallel computingRound-robin schedulingDynamic priority schedulingQuality of serviceComputer hardwareEngineering

Abstract

fetched live from OpenAlex

With recent advances in optical technology, we are closer to building all-optical routers than ever before. A major problem in this area, however, is the lack of all-optical memories similar to what we have in electronics. To overcome this problem, recently, there have been several proposals that show how we can emulate First-In First-Out (FIFO) queues using a combination of fiber delay lines and switches. Unfortunately, FIFO queues cannot be used for implementing many link scheduling policies including weighted fair queuing, weighted round-robin, or strict priority, which are essential components of any modern router today. In this paper, we introduce an architecture based on fiber delay lines and optical switches that can be used for emulating Push-In First-Out (PIFO) queues. In a PIFO queue, an incoming packet can be pushed anywhere in the queue, and therefore it can be used for the implementation of various link scheduling policies. We describe a scheduling algorithm for this architecture and show that with a small speedup, we can build a PIFO queue of size N - 1 using only O(log <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> N) 3 × 3 optical switches. The resulting system has a minimum reliability of 99.5%, and even for the small portion of departure requests that cannot be fulfilled immediately, the requested packet is ready to depart within approximately five time slots from the request time.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: none
Teacher disagreement score0.467
Threshold uncertainty score0.169

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.007
GPT teacher head0.220
Teacher spread0.213 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Quick stats

Citations9
Published2009
Admission routes1
Has abstractyes

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