Variable weight spectral amplitude coding for multiservice OCDMA networks

Abstract

The emergence of heterogeneous applications such as internet data, video streaming, and online gaming, brings in a demand for a network environ- ments with capability of supporting diverse Quality of Services (QoS). Prioritizing the services is essential to ensure the delivery of information is at their best. This paper proposes a new code family to support optical domain service differentiation using spectral amplitude coding techniques within an optical code division multiple access (OCDMA) scenario. A particular user or service has a varying weight applied in order to obtain the desired signal quality. The proposed variable-weight code (VW-code) is constructed based on basic multi-service (MS) code. Mathematical model is developed to for performance evaluation of VW-MS code. In addition, the properties of pro- posed code is compared with other VW-OCDMA codes. It is shown that the proposed VW-MS provide an optimal code length with minimum cross- correlation compared to other VW-codes. Performance of VW-MS designed for triple-play services operating at bit rates of 0.622, 1.25 and 2.5 Gbps is demonstrated

Development and performance improvement of a novel zero cross-correlation code for SAC-OCDMA systems

“…From the Eqs. (13) and (16), the PSD at the photodetector of the lth receiver during one period can be written as:…”

“…And with the property of higher code weight representing better performance, they can be utilized to support multimediaservice(e.g., voice,video, anddatatransmission) and provide different quality of service (QoS) for the various requirements in SAC-OCDMA network [15]. Some of them are VW KS code [9], VW RD code [10], VW MS code [16] and a VW code based on enhanced and modified DW codes [17].…”

Investigation of 2D-WH/TS OCDMA System Performance under the Influence of PMD

“…Optical code-division multiple access (OCDMA) is an attractive multiplexing technique offering a dynamic bandwidth allocation, efficiency in a bursty traffic, a soft limit on a number of simultaneous users, and the improved privacy [1][2][3]. With the advent of modern optical devices, a high capacity OCDMA system operating at 320 Gbit/s (32×10 Gbit/s) has been demonstrated [4].…”

Variable Weight Code Division Multiple Access System for Monitoring Vibration of Unequally Distributed Points

“…It should be noted that the use of optical amplifiers increases the noise as well as the cost. Recently, variable-weight SAC (VW-SAC) system have been proposed to support differentiated quality of service (QoS) in optical communication networks [7,8]. In VW-SAC higher weight codes give better signal quality due to more wavelengths being assigned to a particular user or service.…”

“…In VW-SAC higher weight codes give better signal quality due to more wavelengths being assigned to a particular user or service. Different code families [7,8,9,10] and detection techniques [11] have been proposed for VW-SAC system and successful experimental proof for optical communication has been reported [12].…”