Changes between Version 50 and Version 51 of Architecture/optical


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Timestamp:
May 18, 2020, 4:21:40 PM (4 years ago)
Author:
gilz
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  • Architecture/optical

    v50 v51  
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    33== Optical
    4 This page describes the vision and current deployment of the COSMOS optical connectivity layer, a critical building block of the COSMOS testbed, used to enable high bandwidth and low latency networking and to support experimentation with emerging and future wireless technologies and applications (for more details see [1, Section 4.3]). The optical connectivity layer in COSMOS allows an experimenter to reconfigure connectivity between devices at the L1 (physical) layer. This provides the ability to restructure the physical topology of the entire testbed, changing not just latency between nodes but how individual signals are routed, with no overhead, throughout the testbed.
     4This page describes the vision and current deployment of the COSMOS optical connectivity layer, a critical building block of the COSMOS testbed, which is used to enable high bandwidth and low latency networking and to support experimentation with emerging and future wireless technologies and applications (for more details see [1, Section 4.3]). The optical connectivity layer in COSMOS allows an experimenter to reconfigure connectivity between devices at the L1 (physical) layer. This provides the ability to restructure the physical topology of the entire testbed, changing not just latency between nodes but how individual signals are routed, with no overhead, throughout the testbed.
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    66[1] D. Raychaudhuri, I. Seskar, G. Zussman, T. Korakis, D. Kilper, T. Chen, J. Kolodziejski, M. Sherman, Z. Kostic, X. Gu, H. Krishnaswamy, S. Maheshwari, P. Skrimponis, and C. Gutterman, “Challenge: COSMOS: A city-scale programmable testbed for experimentation with advanced wireless,” in ''Proc. ACM MOBICOM’20 (to appear)'', 2020. [https://wimnet.ee.columbia.edu/wp-content/uploads/2020/02/MobiCom2020_COSMOS.pdf (Download)]
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    88=== Vision
    9 The figure below describes the vision for COSMOS' optical network. As shown, a central Calient S320 320×320 space switch (SS) in the Data Center at Columbia provides a remotely configurable fiber plant network core. Each fiber supports 96 fully transparent channels, which are flexgrid configurable to provision 10/100 Gbps wavelengths. 20 ROADM units are connected to the central SS via 20×4 add/drop fiber pairs. In addition, 20×16 add/drop pairs connect the ROADM units to top of rack (ToR) switches and servers in the data center at Columbia. The 20 fiber pairs per ROADM can be reconfigured to support various requirements from connected servers through top-layer user applications orchestrated by an SDN controller. The central SS is directly connected via dark fiber (provided by !ZenFi and NYC) to the colocation site at 32 AoA that also houses the NYU data center [1, §4.3].
     9The figure below describes the vision for COSMOS' optical network. As shown, a central Calient S320 320×320 space switch (SS) in the Data Center at Columbia provides a remotely configurable fiber plant network core. Each fiber supports 96 fully transparent channels, which are flexgrid configurable to provision 10/100 Gbps wavelengths. 20 ROADM units are connected to the central SS via 20×4 add/drop fiber pairs. In addition, 20×16 add/drop pairs connect the ROADM units to top of rack (ToR) switches and servers in the data center at Columbia. The 20 fiber pairs per ROADM can be reconfigured to support various requirements from connected servers through top-layer user applications orchestrated by an SDN controller. The central SS is directly connected via dark fiber (provided by !ZenFi and NYC) to the colocation site at 32 AoA that also houses the NYU data center [1, Section 4.3].
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    1111[[Image(COSMOS_optical_core.jpg, width=750px)]]