An optical interconnection network for terabit IP routers

H. Jonathan Chao, Ti Shiang Wang

Research output: Contribution to journalArticle

Abstract

As data traffic increases exponentially in the Internet, a need of deploying ATM switches or IP routers with terabit/s capacity is emerging. By taking advantage of the advanced wavelength division multiplexing (WDM) technology, we propose a nonblocking WDM-based optical interconnection network (OIN) to interconnect multiple electronic router modules (RMs), where packets are stored and processed. The proposed architecture uses an input-output buffering scheme, where the OIN operates at twice the line rates to alleviate the head-of-line blocking and thus achieves close to 100% throughput. The OIN is capable of performing multicasting using the method of broadcast and select. Output port contention among the input packets is resolved by a novel ping-pong arbitration (PPA) scheme. For a 256-input packet switch, the arbitration can be completed within 11 gates delay, less than 5 ns using the current CMOS technology. We analyze the complexity of the OIN in optical components and interconnections, its power budget, and crosstalk caused by the finite ON-OFF ratio of optical switching gates. Bit error rates with respect to different ON-OFF ratios and extinction ratios are evaluated by simulations. The result shows that it is feasible to construct a 256 × 256 OIN with existing technology.

Original languageEnglish (US)
Pages (from-to)2095-2112
Number of pages18
JournalJournal of Lightwave Technology
Volume18
Issue number12
DOIs
StatePublished - Dec 2000

Fingerprint

Optical interconnects
Fiber optic networks
Routers
Wavelength division multiplexing
wavelength division multiplexing
Switches
switches
Multicasting
electronic modules
Automatic teller machines
asynchronous transfer mode
Crosstalk
output
Bit error rate
optical switching
bit error rate
crosstalk
budgets
traffic
Throughput

Keywords

  • Arbitration
  • Crosstalk
  • IP router
  • Optical interconnection network (OIN)
  • Packet switch
  • Wavelength division multiplexing (WDM)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

Cite this

An optical interconnection network for terabit IP routers. / Chao, H. Jonathan; Wang, Ti Shiang.

In: Journal of Lightwave Technology, Vol. 18, No. 12, 12.2000, p. 2095-2112.

Research output: Contribution to journalArticle

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