Common use of Comparison Analysis and summary Clause in Contracts

Comparison Analysis and summary. As a summary, Table 3 depicts the feature comparison of the above mentioned switching technologies in terms of defined figure of merits, preference of DCN position and supported switch dimension. It is worth noting that the requirements of switches vary with their DCN position. Specifically, TDM based connections (including Optical TDM and OPS/OBS) are more suitable to support intra-rack short-term and bursty traffic, which need ns optical switch to implement fast reconfiguration while power efficiency is less important. Also, considering the better scalability (which is helpful to extend the support to more servers) of optical cross point technology, it is more suitable than SOA and electro based optic switch to fit in this position. Regarding to the inter-rack and inter-cluster interconnection, switch scalability is a big concern to construct a flattened structure (especially for the inter-cluster communication). So, beam steering and MEMS based switches are more preferred, while beam steering needs fewer reconfiguration time. And also SDM based interconnection technology could facilitate the wiring engineering and improve the port density of switch. Figure of Merits Technology LCoS MEMS SOA Electro Optic Switches Beam Steering Optical Cross Point Power efficiency Low Medium Low High Low (0.1) Medium Reconfiguration time >100ms 10-200ms ns ns 25ms ns

Comparison Analysis and summary. ‌ As a summary, Table 3 depicts the feature comparison of the above mentioned switching technologies in terms of defined figure of merits, preference of DCN position and supported switch dimension. It is worth noting that the requirements of switches vary varies with their DCN position. Specifically, TDM based connections (including Optical TDM and OPS/OBS) are more suitable to support intra-rack short-term and bursty traffic, which need ns optical switch to implement fast reconfiguration while power efficiency is less important. Also, considering the better scalability (which is helpful to extend the support to more servers) of optical cross point technology, it is more suitable than SOA and electro based optic switch to fit in this position. Regarding to the inter-rack and inter-cluster interconnection, switch scalability is a big concern to construct a flattened structure (especially for the inter-cluster communication). So, beam steering and MEMS based switches are more preferred, while beam steering needs fewer reconfiguration time. And also SDM based interconnection technology could facilitate the wiring engineering and improve the port density of switch. Figure of Merits Technology LCoS MEMS SOA Electro Optic Switches Beam Steering Optical Cross Point Power efficiency Low Medium Low High Low (0.1) Medium Reconfiguration time >100ms 10-200ms ns ns 25ms ns

Comparison Analysis and summary. As a summary, Table 3 6 depicts the feature comparison of the above mentioned switching technologies in terms of defined figure of merits, preference of DCN position and supported switch dimension. It is worth noting that that, the requirements of switches vary varies with their DCN position. Specifically, TDM based connections (including Optical TDM and OPS/OBS) are more suitable to support intra-rack short-term and bursty traffic, which need ns optical switch to implement fast reconfiguration while the power efficiency is less important. Also, considering the better scalability (which is helpful to extend the to support to more servers) of optical cross point technology, it is more suitable than SOA and electro based optic switch to fit in this position. Regarding to the inter-rack and inter-cluster interconnection, switch scalability is a big concern to construct a flattened structure (especially for the inter-cluster communication). So, beam steering and MEMS based switches are more preferred, while beam steering needs fewer reconfiguration time. And also SDM based interconnection technology could facilitate the wiring engineering and improve the port density of switch. Table 6 Feature Comparison of different Switch Technologies Figure of Merits Technology LCoS MEMS SOA Electro Optic Switches Beam Steering Optical Cross Point Power efficiency Low Medium Low High Low (0.1) Medium Reconfiguration time >100ms 10-200ms ns ns 25ms ns