Fiber based access networks can deliver performance that can support the in­ creasing demands for high speed connections. One of the new technologies that has emerged in recent years is Ethernet Passive Optical Networks. The key fea­ tures of this approach are the simplicity of the architecture and compatibility with existing Ethernet based local area networks. To make Ethernet Passive Optical ...

This paper gives an overview of current work and research conducted on passive optical networks, namely on dynamic bandwidth allocation and providing quality of service guarantees. The main areas of interest for investigating dynamic bandwidth allocation are grant sizing, grant scheduling and optical network unit queue scheduling. Regarding quality of service parameters bandwidth, delay and jit...

A dynamic bandwidth assignment protocol is proposed that demonstrates impartial and highly efficient bandwidth arrangement for gigabit-capable passive optical networks. In particular the novel algorithm automatically modifies the assigned bandwidth per optical network unit to support quality of service and service level agreement according to maximum network capacity and users’ queuing status. ...

The need for faster detection and restoration of faults and degradations is essential in the optical networks due to the amount of traffic being carried by them. This calls for tighter control on the detection and reporting mechanisms. In this document we analyze the requirements event communications between the active and passive devices, which in turn can be used by the optical control plane....

Alongside the spread of the Internet in recent years, high-speed data transmission services for subscriber networks (access networks) have taken root in a real way. This has been accompanied by a growth in fibre-optic communications networks. Fig. 1 illustrates an optical communications network. The core DWDM (Dense Wavelength Division Multiplexing) optical network is connected to LANs (Local A...

III. Preliminary results 5 IIIa. Three-mirror quasi-optical passive compressor 6 IIIb. Optimization of the three-mirror passive compressor parameters 7 IIIc. Prototype of a passive compressor with a three-mirror resonator 10 IIId. Four-mirror quasi-optical passive compressor 14 IIIe. Prototype of a passive compressor with a four mirror resonator 15 IIIf. Diffraction gratings as active elements ...

Many results exist in the literature describing technological and theoretical advances in optical network topologies and design. However, an essential eeort has yet to be done in linking those results together. In this paper, we propose a step in this direction , by giving optical layouts for several graph-theoretical topologies studied in the literature, using the Optical Transpose Interconnec...

One of the important issues in the design of future generation high-speed networks is to provide differentiated services to different types of traffic with/without various time constraints and priorities. In this paper, we study the problem of providing differentiated services in passive star coupled wavelength division multiplexing (WDM) optical networks. We present a medium access control (MA...

With the growing demand of very high bandwidth services such as high definition IP Television (IPTV), Service Providers (SPs) are moving to fiber-based solutions such as Passive Optical Networks (PONs) to meet current and future bandwidth needs. As these networks are deployed, coverage tends to directly affect Capital Expenditure (CAPEX) per subscriber served, with a minimum cost per Optical Ne...

Optical tapping devices placed in public and private optical networks today allow unfettered access to all communications and information transiting any fiber segment. Available legally and inexpensively from numerous manufacturers worldwide, optical taps are standard network maintenance equipment that are in use daily. When used nefariously, optical taps provide an excellent method of intercep...