The reemergence of metropolitan area networks (MANs) is being stimulated by the continued growth of the Internet. Here we introduce the likely role that optical burst switching (OBS) will play in the development of 10-Gbit Ethernet (10GbE) metropolitan networks. Although the synchronous optical network (SONET) is being proposed to provide wide-area connectivity for 10GbE MANs, its synchronous t...

As cloud computing data centers grow larger and networking devices proliferate; many complex issues arise in the network management architecture. We propose a framework for multi-layer; multi-vendor optical network management using open standards-based software defined networking (SDN). Experimental results are demonstrated in a test bed consisting of three data centers interconnected by a 125 ...

To solve the explosively growth of the Internet demands, Metropolitan area networks (MAN) use SONET to provide huge bandwidth. However, the SONET network is suitable for Constant Bit Rate (CBR) traffic. Therefore, it cannot effectively handle the burst-natured Metropolitan area networks Traffic. This paper proposed a novel MAN network architecture and protocol by using the wavelength division m...

The rainfall spatial organization in the metropolitan area of Barcelona (Spain) has been studied from records of an urban rain gauge network in the period 1994–2009. Using statistical and regional analysis techniques, correlation between data recorded by the different rain gauges has been calculated, and the effective number of independent stations (neq) equivalent to the used network has been ...

Emerging high-speed metropolitan Ethernets create new opportunities to save costs when converging data and telephony services. However, connecting GSM and UMTS base stations over metropolitan Ethernets require these networks to meet stringent QoS requirements in the presence of bursty data traffic. To investigate this problem, we have probed ETH’s campus network, which spans the metropolitan ar...

This paper examines the positioning accuracy of a GSM beaconbased location system in a metropolitan environment. We explore five factors effecting positioning accuracy: location algorithm choice, scan set size, simultaneous use of cells from different providers, training and testing on different devices, and calibration data density. We collected a 208-hour, 4350Km driving trace of three differ...