We study wavelength assignment for lightpaths over WDM rings to minimize the SONET ADMs used. This problem has attracted much attention recently. However, its computation complexity remains unknown, and the only known heuristic [6] which does not allow the splitting of lightpaths is problematic in both the algorithm itself and its performance analysis. We first prove the NP-completeness of this...

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...

Optical Packet Switching (OPS) is among the most promising solutions for next generation metropolitan networks. The increase of packetbased services (video on demand, etc.) is pushing metropolitan networks providers to renew their infrastructures. Today, metropolitan networks are based on SONET/SDH circuit-switched networks, which are becoming inefficient and costly to support new requirements ...

SONET/WDM networks using wavelength add-drop multiplexing can be constructed using certain graph decompositions used to form a `grooming', consisting of unions of certain primitive rings. The existence of such decompositions when every pair of sites employs no more than 1 8 of the wavelength capacity is determined , with few possible exceptions, when the ring size is a multiple of four.

Jitter is a key performance factor in high-speed digital transmission systems, such as synchronous optical networks/synchronous digital hierarchy (SONET/SDH), optical transport networks (OTN), and 10 Gigabit Ethernet (GigE). This paper outlines the differences between telecom and datacom jitter standards and describes the various jitter applications for compliance testing of 10G small form-fact...

We analyze how network throughput degrades in three MAN rings, SONET/SDH, packet-switched, and WDM, following a failure/restoration. For the same ring capacity, WDM rings offer the best network throughput before and after a link failure/restoration.  2001 Optical Society of America OCIS codes: 060.4250 (Networks)