Performance Of Mesh Networks Research Articles

Electrical ingress buffering and traffic aggregation for optical packet switching and their effect on TCP-level performance in optical mesh networks

The wide deployment of wavelength-division multiplexing technology and new transmission techniques have resulted in significant increases in the transmission capacity in optical fibers, both in the number of wavelengths and the bandwidth of each wavelength channel. Meanwhile, the fast growth of the Internet demands more data switching capacity in the network in order to deliver high bandwidth to end users. Although the capacity of electronic routers has been increasing consistently in the past, optical switching appears to be a more cost-effective way to switch individual wavelengths. As the bit rate per wavelength channel continues to grow, optical subwavelength switching emerges as a new paradigm capable of dynamically delivering the vast bandwidth WDM offers. This article discusses one of such techniques, namely optical packet switching, and its performance perceived by end users in optical mesh networks. Specifically, our investigation reveals the benefit of using electrical ingress buffering and traffic aggregation to reduce packet-loss rate of optical packet-switched networks. Through simulation experiments, we present an evaluation of the network's TCP-level performance based on the proposed architecture.

Architectural performance analysis of linear-lightwavemultifibre WDMnetworks in grid topology

A simple framework for analysing the performance of multifibre WDM mesh networks using spatial fibre distribution is introduced by relatively comparing their performance to that of conventional WDM cross-connect networks. Preliminary analysis shows that multifibre networks need a larger amount of fibre, but can be applied to a relatively short-haul region by virtue of their simple node design.

Electronic wavelength translation in optical networks

In this paper, we study the benefits of electronic (regenerative) wavelength translation in optical networks providing wavelength channel circuit-switching among users. Electronic translation means that an optical signal on one wavelength is converted to electronics and then converted again into an optical signal on another wavelength. A previous study has demonstrated that all-optical wavelength translation can significantly improve the performance of a large mesh network. In this paper, we consider an optical network architecture based on a mesh topology where each node is supplied with an array of W transmitters and receivers (where W is the number of wavelengths). For this architecture, we study effectiveness of electronic wavelength translation as a low cost alternative to all-optical wavelength translation. We propose wavelength assignment algorithms over a given routing path which minimize the number of wavelength changes. The results of our performance study for a static routing mesh network show that electronic translation with such algorithms can be almost as effective as all-optical wavelength translation. In fact, the performance of electronic translation converge to those of all-optical translation as the size of a large mesh increases.

Life beyond linear topologies (MANs)

The performance of a particular two-connected mesh network, the Manhattan street network, is compared with that of the distributed queue dual bus (DQDB) network, which has been standardized by the IEEE 802.6 Committee for MANs. Both of these networks have the same number of links, and the nodes have the same number of transmitters and receivers. A description of the topology and the access protocols of both networks is included. There is also a comparison of the throughput that the networks can support and their ability to adapt to fluctuating traffic patterns. The network reliability is investigated, both for degradations in throughput and loss in connectivity. The results are presented.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>