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Ei Figure 4. Waveband conversion and failure recovery.

Figure 4 Ei Figure 4. Waveband conversion and failure recovery.

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Figure 1.4 muttigranular photonic cross-connect consisting of a three-layer MG-OXC and a DXC. fic at multiple granularities. Traffic can be trans- ported from one level to another via multiplex- ers and demultiplexers within the MG-OXC. switches a fiber using one port (space switching) at the fiber cross-connect if none of its wave- lengths is used to add or drop a lightpath. Oth- erwise, it will demultiplex the fiber into bands, and switch an entire band using one port at the band cross-connect if none of its wavelengths needs to be added or dropped. In other words, only the band(s) whose wavelengths need to be added or dropped will be demultiplexed, and only the wavelengths in those bands that carry bypass traffic need to be switched using the WXC. This is in contrast to ordinary OXCs, which need to switch every wavelength individu- ally using one port. Pere SRNR ERNE EN PVE A Se The MG-OXC is a key element for routing high- speed WDM data traffic in a multigranular opti- cal network. While reducing its size has been a major concern, it is also important to devise node architectures that are flexible (reconfig- urable) yet cost-effective. Figure 1 shows a typi- cal MG-OXC considered in [2, 6], which includes the fiber cross-connect (F:<C), band cross-con- nect (BXC), and wavelength cross-connect (WXC) layers.
Figure 1.4 muttigranular photonic cross-connect consisting of a three-layer MG-OXC and a DXC. fic at multiple granularities. Traffic can be trans- ported from one level to another via multiplex- ers and demultiplexers within the MG-OXC. switches a fiber using one port (space switching) at the fiber cross-connect if none of its wave- lengths is used to add or drop a lightpath. Oth- erwise, it will demultiplex the fiber into bands, and switch an entire band using one port at the band cross-connect if none of its wavelengths needs to be added or dropped. In other words, only the band(s) whose wavelengths need to be added or dropped will be demultiplexed, and only the wavelengths in those bands that carry bypass traffic need to be switched using the WXC. This is in contrast to ordinary OXCs, which need to switch every wavelength individu- ally using one port. Pere SRNR ERNE EN PVE A Se The MG-OXC is a key element for routing high- speed WDM data traffic in a multigranular opti- cal network. While reducing its size has been a major concern, it is also important to devise node architectures that are flexible (reconfig- urable) yet cost-effective. Figure 1 shows a typi- cal MG-OXC considered in [2, 6], which includes the fiber cross-connect (F:<C), band cross-con- nect (BXC), and wavelength cross-connect (WXC) layers.
M@ Figure 2.4 multigranular photonic cross-connect consisting of a single-layer MG-OXC and a DXC.
M@ Figure 2.4 multigranular photonic cross-connect consisting of a single-layer MG-OXC and a DXC.
Qa Figure 3. Classification of the WaveBand Switching scheme.
Qa Figure 3. Classification of the WaveBand Switching scheme.
DO Table 1. Total number of ports in the NSF network.
DO Table 1. Total number of ports in the NSF network.
B Figure 5. Blocking probability vs. reconfiguration ratio for a multilayer MG-OXC.
B Figure 5. Blocking probability vs. reconfiguration ratio for a multilayer MG-OXC.
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