NG-Transport Tech Lecture15-16.ppt

35 contiguous and virtual concatenation comparison

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35 Contiguous and Virtual Concatenation Comparison Service Bit Rate Contiguous Concatenation Virtual Concatenation Ethernet 10 Mbps VC-3 (20%) VC-11-7v (89%) Fast Ethernet 100 Mbps VC-4 (67%) VC-3-2v (99%) Gigabit Ethernet 1000 Mbps VC-4-16c(42%) VC-4-7v (95%) Fiber Channel 1700 Mbps VC-4-16c(42%) VC-4-12v (90%)
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36 Link Capacity Adjustment Scheme It is standardized by the ITU-T as G.7042 LCAS is a signaling protocol for sizing virtually concatenated paths With LCAS, VCG can be resized at any time without disturbing network traffic LCAS can add and remove members of a VCG to match the variable bit rate patterns and the burst nature of most data networks
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37 Link Capacity Adjustment Scheme LCAS signaling messages are exchanged to change the number of VC between the source and the destination of the path The number of VC can be increased or decreased without any frames lost therefore increasing or decreasing the capacity of the VCG link
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38 Transmission Of Frames
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39 NGSDH Limitations Engineered for voice not for data Static bandwidth allocation Inefficient bandwidth utilization Complicated service provisioning. Creating an end-to-end circuit takes many steps Ethernet rates do not match SDH rates High cost of bandwidth change
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40 Practical Considerations Inclusion of one Card (ET1 Board in Huawei Optix 2500+) in traditional SDH Sub-rack Up-gradation of Software at NMS (if Ethernet Functinality not included in T2000) Pure NGSDH Systems (like Huawei OSN series) some differences include: No need to delete Traffic for deleting Protection Optical Interfaces are plug-able, no need to replace full card Support ASON
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41 BOARDS in NGSDH SDH Unit SF64 1xSTM-64 with FEC SL64 1xSTM-64 interface board SLD64 2xSTM-64 interface board SLQ64 4xSTM-64 interface board
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42 Continue… PDH Unit: SPQ4 4 x E4/STM-1 Processing board PD3 6 x E3/T3 Processing board PL3 3 x E3/T3 Processing board PQ1 63 x E1 Processing board PQM 63 x E1/T1 Processing board
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43 Continue… Ethernet Unit: EGS4 4 x GE with interface board EGS2 2 x GE with interface board EMS4 4 x GE + 16x FE with interface board EFS4 4 x FE with interface board
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44 DWDM
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45 SDM TDM WDM Background SDM-Space Div Multiplexing
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46 PDH SDH DWDM 155M 622M 2.5G 10G G.957 G.691 G.692 PDH, SDH and DWDM
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47 IP IP ATM ATM SDH SDH Physical Fiber DWDM Physical Fiber Open Optical Interface Open Optical Interface SDH SDH ATM ATM IP IP Other Other Relationship between DWDM and Other Services
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48
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49 WDM Definition WDM technology is a fiber communication technology transmitting multiple optical carriers with information (analog or digital) on one fiber. N 2 1 N 2 1 N 2 1 OMU ODU OA
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50 WDM Definition The technology of combining a no. of wavelengths onto the fiber is known as Wavelength Division Multiplexing.
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  • Fall '19
  • Synchronous optical networking, Multiplexing, Wavelength-division multiplexing, osc, NG SDH

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