This paper proposes a dynamic routing and wavelength assignment (RWA) scheme in multifiber WDM networks with wavelength conversion capability. In multifiber WDM networks, each link consists of multiple fibers. Thus, multiple lightpaths with the same wavelength can be established in the same link as long as they use different fibers. In WDM networks with wavelength conversion, the network nodes ...

Integration of SDH and WDM network technology in dynamic multilayer networks is considered one promising option for migrating from rather static SDH networks to the automatically switched transport network (ASTN) with a dynamic photonic layer. This paper investigates dimensioning of SDH/WDM multilayer networks. Two different approaches for dimensioning network links and nodes are compared for d...

Subcarrier wavelength-division multiaccess (SCM-WDM) networks have many features, such as high system capacity, flexible packet switching access and very fast tuning speed of RF local-oscillator, etc. Though, generally speaking, existing protocols for WDMA networks can be applied to SCM-WDM networks, the transmission efficiency in terms of packet delay and network throughput is low, since an op...

Current means of providing loop-back recovery, which is widely used in SONET, relies on fiber-based recovery, where a fiber is used to back up another fiber. We present WDM-based loop-back recovery for optical networks where wavelengths are used to back up other wavelengths. We present two new algorithms for performing WDM-based loop-back over optical mesh networks. The first algorithm performs...

As the Internet and network technologies evolve, the IP over WDM solution has been envisioned as the most promising solution for the next generation Internet architecture. So survivability in IP/WDM networks becomes critical for the success of the next generation Internet architecture. Considerable research efforts have been dedicated to studying the survivability in IP/GMPLS and WDM network re...

Metro WDM networks play an important role in the emerging Internet hierarchy; they interconnect the backbone WDM networks and the local access networks. The current SONET/SDH–over–WDM–ring metro networks are expected to become a serious bottleneck — the so–called metro gap — as they are faced with an increasing amount of bursty data traffic and quickly increasing bandwidths in the backbone netw...

Alberto Bononi Universit a di Parma { Dipartimento di Ingegneria dell'Informazione { Viale delle Scienze, I-43100 Parma, Italy phone: +39-521-905-760 fax: +39-521-905-758 { email: [email protected] Abstract| Using analogies between the basic theory of cell switching for datagram networks and multiwavelength slotted optical networks, we show that the bu ering capabilities of high-speed slotted...

The performance of a parallel computer greatly depends upon how, the different processors are capable of exchanging data. This, thus require an arbitrary permutation (nonblocking) to be done by the connection networks. A nonblocking network is capable of providing N parallel paths between a pair of nodes forming any arbitrary permutation. In this paper, we present three different simple nonbloc...

One approach for accommodating IP traffic on the wavelength division multiplexing (WDM) network is to construct a logical topology by establishing a set of lightpaths between nodes. The lightpath carries IP traffic and does not require any electronic packets processing at intermediate nodes, which reduces the load of packet processing at those nodes. However, if IP and WDM networks have their o...

WDM networks depend on predetermined, fixed wavelength channels, requiring highly stable lasers and tunable filters. Robust WDM networks, based on dynamically selected wavelengths, relax manufacturing and operating wavelength tolerance requirements leading to low-cost implementations. A node dynamically selects a currently unused wavelength for communication, and uses it for a limited period of...