Optical and Electronic Combined Buffer Architecture for Optical Packet Switches

Hirayama, Takahiro; Miyazawa, Tatsuo; Furukawa, Hideaki; Harai, Hiroaki

doi:10.1364/jocn.7.000776

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…When conflicts come into existence, resolution algorithms based on optical buffering take action. Buffering management at the core codes deals with packets that simultaneously compete to obtain the same resource [7][8][9][10][11][12]. The goal of packet buffering is to reduce the packet loss to the lowest possible level.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Level Buffering Services Based on Optical Packet Encoding of Composite Maximal-Length Sequences in a GMPLS Network

Chen

Hong

2020

Applied Sciences

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Generalized multi-protocol label-switching (GMPLS) provides packet-switching with multiple speeds and quality-of-services (QoSs). Packet buffering in GMPLS reduces packet loss by resolving the conflicts between packets requesting for a common channel. Presently, due to the diversity of multimedia applications, enabling multiple services in networks has become necessary. In this paper, a family of codes known as composite maximal-length sequence (CMLS) codes is introduced into an optical buffering scheme based on code-switching. A given number of available CMLS codes is divided into several code subsets. The buffer selects an unused CMLS code from a code subset and assigns it to the incoming packet. When all codes in a specific subset have been distributed to the queued packets, a free CMLS code in another subset is chosen for the new arrival. To achieve multi-level buffering services, the partition scenario with a lower subset number but with a higher number of codes in an individual subset is used as a code-assigning method for buffering high-QoS users. A two-level buffering system is demonstrated by examining the QoS of each class in terms of packet-dropping probability (PDP). The results show that different levels of PDPs can be effectively supported by a common buffer architecture.

show abstract

Section: Introductionmentioning

confidence: 99%

“…As the OPS network will experience less packet-dropping, GMPLS with conflict resolution can support the development of future OPS networks. Optical buffering schemes can be generally boiled down to three categories: fiber delay line [7,8], wavelength conversion [9,10], and code-switching [11,12].…”

Section: Introductionmentioning

confidence: 99%

Multi-Level Buffering Services Based on Optical Packet Encoding of Composite Maximal-Length Sequences in a GMPLS Network

Chen

Hong

2020

Applied Sciences

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Queueing analysis of optical and electronic combined buffer for optical packet switches

Hirayama

Miyazawa

Harai

2015

Optical Switching and Networking

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Complimentary code keying of spectral amplitude coding signals in optical buffering with increased capacity

Chen

Hong

2020

J. Eur. Opt. Soc.-Rapid Publ.

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Signal buffering services such as contention resolution and congestion avoidance are essential in optical packet switching networks. In this paper, an optical memory scheme based on spectral amplitude coding (SAC) and complementary code keying (CCK) is proposed to increase the buffer capacity. CCK is applied to packet buffering by selecting an available code set and encoding the payload bits with either an SAC signal or its complementarity. The capacity constraint is effectively released, as the usable codes for queuing packets are twice those for the conventional code-domain buffers. To minimize system costs by reducing the codec number, a shared structure based on an arrayed waveguide grating (AWG), which is capable of processing both the typical and complimentary coded signals simultaneously, is also investigated.

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Optical and Electronic Combined Buffer Architecture for Optical Packet Switches

Cited by 6 publications

References 8 publications

Multi-Level Buffering Services Based on Optical Packet Encoding of Composite Maximal-Length Sequences in a GMPLS Network

Multi-Level Buffering Services Based on Optical Packet Encoding of Composite Maximal-Length Sequences in a GMPLS Network

Queueing analysis of optical and electronic combined buffer for optical packet switches

Complimentary code keying of spectral amplitude coding signals in optical buffering with increased capacity

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