Wireless LANs are becoming commonplace because of their ease in providing mobile communication. As use of IEEE 802.11 continues to expand, support for voice will Preprint submitted to Elsevier Science 2 December 2004 become a desirable feature. Supporting voice conversations over a packet network is more challenging than over current circuit switched wired networks. These challenges are particu...

Network redimensioning (medium term planning) means to determine volume of telecommunication resources, necessary to serve given traffic offered taking into account the prescribe Quality of services (QoS). Two different network redimensioning methods are considered in this paper. The aim of the research is comparison between network redimensioning method, using ITU E.600 traffic offered definit...

The paper addresses the topic of long-haul optical networking for the provision of large-bandwidth IP services. A class of optical packet switching architectures is considered which adopts an arrayed wavelength grating device as packet router. The architecture performs slotted packet switching operations and fully exploits the wavelength routing capabilities by allowing multi-wavelength switchi...

This letter presents a novel frame splitting scheme for an error-robust audio streaming over packet-switching networks. In our approach to perceptual audio coding, an audio frame is split into several subframes based on the network configuration such that each packet can be decoded independently at the receiver. Through a subjective comparison category rating (CCR) test, it is discovered that o...

The ever-growing demand for additional bandwidth reflects on the increasing capacity requirements from backbone switches and routers. As these systems increase in port count (tens and even hundreds) and line rates (oc-48 and oc-192), the engineering effort pertaining to the design and management of their switch fabric cores becomes more challenging. The performance of a switch/router as a whole...

Optical packet switching based on Wavelength Division Multiplexing (WDM) offers the possibility of increased granularity and more effective use bandwidth in large capacity systems, on scale of Tb/s. The natural integration of optical packet switching in photonic technology opens up the possibility of packet switching in transparent optical channels , where the packets remain from end-to-end in ...

Thank you very much for inviting me to speak with you today. Recently, the Federal Communications Commission (FCC) has been spending a great deal of time and energy considering the best, most appropriate regulation of broadband networks and IP-enabled services.1 Today, I want to focus on an important aspect of our discussions. Namely, what are the implications of the digital revolution for our ...

A hybrid channel assignment (HCA) scheme in direct sequence-code division multiple access (DS-CDMA) systems for accommodating integrated voice/data traffic is proposed and the required power levels of voice and data traffic are derived. These levels can be used to maintain the minimum required link qualities of all calls. In the proposed scheme, delay-sensitive voice traffic is accommodated in ...