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As wavelength division multiplexing (WDM) technology matures and multicast applications become increasingly popular, supporting multicast at the WDM layer becomes an important and yet challenging topic. In this paper, we study constrained multicast routing in WDM networks with sparse light splitting, i.e., where some switches are incapable of splitting(More)
In high-speed SONET rings with point-to-point WDM links, the cost of SONET add–drop multiplexers (S-ADMs) can be dominantly high. However, by grooming traffic (i.e., multiplexing lower-rate streams) appropriately and using wavelength ADMs (WADMs), the number of S-ADMs can be dramatically reduced. In this paper, we propose optimal or near-optimal algorithms(More)
In this paper, we consider the problem of scheduling all-to-all personalized connections (AAPC) in WDM rings. Scheduling one connection for every source–destination pair in a network of limited connectivity provides a way to reduce routing control and guarantee throughput. For a given number of wavelengths K and a given number of transceivers per node T ;(More)
Supporting WDM multicasting in an IP over WDM network poses interesting problems because some WDM switches may be incapable of switching an incoming signal to more than one output interface. An approach to WDM multicasting based on wavelength-routing, which constructs a multicast forest for each multicast session so that multicast-incapable WDM switches do(More)
Tra c Grooming and Wavelength Assignment in SONET/WDM Rings1 Xijun Zhang and Chunming Qiao Abstract|In high-speed SONET rings with point-to-point WDM links, the cost of SONET Add-Drop Multiplexers (SADMs) can be dominantly high. However, by grooming tra c (i.e. multiplexing lower rate streams) appropriately and using wavelength ADMs (WADMs), the number of(More)
A WDM optical layer can provide diierent classes of services to various upper layer protocols by forming many virtual optical networks (VONs). Poly-morphic control of an optical layer in the form of On-demand-reconnguration in some VONs and Self-reconnguration in other VONs is proposed. The former is suitable for bursty traac and short-lived connections,(More)