Two-Code Keying and Code Conversion for Optical Buffer Design in Optical Packet Switching Networks

Chen, Kaisheng; Chen, Chien‐Sheng; Wu, Xin

doi:10.3390/electronics8101117

Cited by 4 publications

(2 citation statements)

References 20 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.

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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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A Novel Method for Analyzing the Performance of Free Space Optical Communication in WDM Using EDFA

Periyasamy¹,

Rathinam²,

Karthikeyan³

et al. 2023

Wireless Pers Commun

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This paper intends to design anarti cial model of WDM Optical Network in respect of length, pump power and simple free space optical link which is designed and analysis of several FSO (Free-space optical communication) factors such as Bit Error Rate (BER), Q factor and received power have been measured with regard to the variants in the beam divergence and attenuation. The Simulation process of the System has been done using Optic simulation software to achieve gain enhancement and decrease noise factor of Erbium Doped Fiber Ampli er (EDFA) through optimized ber length and pump power. This workfocused to construct arti cial design and analyses of 16 channels WDM system using EDFA and the in uence of irregular atmospheric Motions on the link performance has been inspected by uctuating beam divergence, atmospheric disturbances and modulation format at the bit rate of 10 Gb/s. As slicing in WDM schemes, in the transmitter channel with the frequency of 1558nm and chip spacing 0.4nm, power value is equal to + 23.5dBm, whereas the optical power meter plus can be used to predict the output power in the form of NRZ modulation, while the input power is produced with a help of CW laser, the gain level has been enriched from 1564nm to 1558nm wavelength band with bit rate of 10GbpS.This system is prepared by using Optic simulation software version 7.

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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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Two-Code Keying and Code Conversion for Optical Buffer Design in Optical Packet Switching Networks

Cited by 4 publications

References 20 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

A Novel Method for Analyzing the Performance of Free Space Optical Communication in WDM Using EDFA

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

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