Optical networking update

Green, Jr. P.E.

doi:10.1109/49.510902

Cited by 203 publications

(57 citation statements)

References 40 publications

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“…A variety of multiple access techniques such as Wavelength Division Multiplexing (WDM), Time Division Multiple Access (TDMA), and Code Division Multiple Access (CDMA) are commonly considered [14], [15]. While these accessing methods have natural counterparts in the radio channel, the Poisson channel is unique in that the channel input must be non-negative.…”

Section: C1 < A/ementioning

confidence: 99%

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The Poisson multiple-access channel

Lapidoth

Shamai

1998

IEEE Trans. Inform. Theory

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The Poisson multiple access channel (MAC) models many-to-one optical communication through an optical fiber or in free space. For this model we compute the capacity region for the two-user case as a function of the allowed peak power. Focusing on the maximum throughput we generalize our results to the case where the users are subjected to an additional average power constraint and to the many users case. We show that contrary to the Gaussian MAC, in the Poisson MAC the maximum throughput is bounded in the number of users. We quantify the loss that is incurred when Time Division Multi-Accessing (TDMA) is employed and show that while in the two-user case and in the absence of dark current the penalty is rather mild, the penalty can be quite severe in the many users case in the presence of large dark current. We introduce a generalized TDMA technique that mitigates this less to a large extent.

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Section: C1 < A/ementioning

confidence: 99%

“…In recent years optical multi-user communication systems were introduced and intensively investigated [14], [15]. A variety of multiple access techniques such as Wavelength Division Multiplexing (WDM), Time Division Multiple Access (TDMA), and Code Division Multiple Access (CDMA) are commonly considered [14], [15].…”

Section: C1 < A/ementioning

confidence: 99%

The Poisson multiple-access channel

Lapidoth

Shamai

1998

IEEE Trans. Inform. Theory

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“…Slotted rings allow slot synchronization even at extremely high data rates [11] . Moreover, the ring topology permits the implementation of collision-free access protocols with no requirements for the usage of distributed algorithms or fixed access schemes as required by star topologies [12] . The utilization of slotted ring eliminates channel and receiver collisions by the complementary deployment of Time Division Multiple Access (TDMA).…”

Section: Unidirectional Wdm Slotted Ring Networkmentioning

confidence: 99%

A Discrete Event Modeling and Simulation of Wave Division Multiplexing Unidirectional Slotted Ring Metropolitan Area Network

Fua’ad¹,

Subramaniam²,

Othman³

et al. 2009

J. of Computer Science

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Problem statement:The lack of uniformity in the choice of simulation platforms for optical WDM networks stands behind the difficulty of developing a common simulation environment. Correlating WDM unidirectional slotted ring network to Discrete Event Simulation (DES) encompassing event definition, time advancing mechanism and scheduler has yet to be developed. Approach: The study focused on the proposed and the development of an event based discrete simulator for the WDM unidirectional slotted ring network to facilitate the reuse of the protocol modules under a common simulation environment. The proposed network architecture implemented for the developed simulator employs a separate wavelength as the control information channel. This control information enabled the nodes to monitor their access to the transmission media. Each node was equipped with a tunable transmitter and fixed receiver for data communication. Access nodes were equipped with a fixed transmitter and fixed receiver for the control information exchange. The developed simulator had derived the use of dividing the wavelength into slots. Nodes used these slots to transmit fixed size packets. Slots can be reused by the access node after receiving packets by the deployment of the spatial reuse scheme, thus enhancing the bandwidth utilization. The developed simulator had derived the set of the parameters, events, performance metrics and other unique WDM simulator elements according to a detailed analysis of the base model. Results: The network delay and packet loss were investigated and compared to a benchmark of the modeled domain. Successful deployment of the developed simulator was proven by the generated results. Conclusion: Extensive performance analysis of WDM unidirectional slotted ring network can be deployed using the developed simulator with low computational overheads. Further enhancements were to extend the developed simulator for bidirectional slotted ring supporting fairness control and considering both uniform and non-uniform traffic.

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“…We note that e is the only common edge of G 1 and G 2 . Let T denote the set of lightpaths over e and T={l 1 , l 2 …”

Section: Bounds On the Chromatic Indexmentioning

confidence: 99%

Optimal Wavelength Converter Placement with Guaranteed Wavelength Usage

Fang

Low

2006

NETWORKING 2006. Networking Technologies, Services, and Protocols; Performance of Computer and Communication Networks; Mobile A

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Abstract. In this paper, we study the following problem. Given the network topology and traffic demand, determine how a minimum set of wavelength converters should be placed to ensure that the number of wavelengths needed will not exceed a given bound L+u, where L is the maximum link load in the network and u is a parameter defined by the network designer to reflect the overall availability of wavelength resources. This problem, however, is proved to be NP-hard. Hence we develop an efficient heuristic algorithm and extensive theoretical and experimental studies are carried out to verify the effectiveness and performance of the algorithm.

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Optical networking update

Cited by 203 publications

References 40 publications

The Poisson multiple-access channel

The Poisson multiple-access channel

A Discrete Event Modeling and Simulation of Wave Division Multiplexing Unidirectional Slotted Ring Metropolitan Area Network

Optimal Wavelength Converter Placement with Guaranteed Wavelength Usage

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