2 Use case of content synchronizationwith the cloud through near field communication 2 Typical requirements Communication distance Up to a few cm (proximity) Data speed 4 Gbps a few tens of Gbps – Propagation environment Inter-device proximity model (LoS) Required BER 8% PER (before retransmission control) 3.1.3 Wirelesscommunication between servers inside a data center Figure 3 shows a use case ofTHz communication between servers inside a data center. Recently, services utilizing the cloud have been rapidly increasing and have accelerated the construction of data centers. Generally, several server racks equipped with various servers including storage and multiple switches can be found in data centers, and it is desirable that the wiring between servers within server racks and the wiring between racks be made wireless. Table 3 shows the typical requirements in this use case. Communication distances from a few cm, assuming connection between servers arranged vertically within server racks, to a few m assuming connection between racks. Regarding the propagation environment, it is necessary to consider both LoS and NLoS which assumes an office model where building materials with comparatively low permeability (high reflectivity) are utilized, but if we envision a special case where the server rack is placed near the wall surface and cable connections between rear panels are replaced by THz communication link, a two-model can be applied between rear panels. 3 Wireless communication between servers inside a data center 3 Typical requirements Communication distance A few cm a few m (proximity) – Data speed A few tens of Gbps a few hundreds of Gbps – Propagation environment Office model/two-model (LoS/NLoS) Required BER 8% PER (before retransmission control)
2 Use case of content synchronizationwith the cloud through near field communication 2 Typical requirements Communication distance Up to a few cm (proximity) Data speed 4 Gbps – a few tens of Gbps Propagation environment Inter-device proximity model (LoS) Required BER 8% PER (before retransmission control) 3.1.3 Wirelesscommunication between servers inside a data center Figure 3 shows a use case ofTHz communication between servers inside a data center. Recently, services utilizing the cloud have been rapidly increasing and have accelerated the construction of data centers. Generally, several server racks equipped with various servers including storage and multiple switches can be found in data centers, and it is desirable that the wiring between servers within server racks and the wiring between racks be made wireless. Table 3 shows the typical requirements in this use case. Communication distances from a few cm, assuming connection between servers arranged vertically within server racks, to a few m assuming connection between racks. Regarding the propagation environment, it is necessary to consider both LoS and NLoS which assumes an office model where building materials with comparatively low permeability (high reflectivity) are utilized, but if we envision a special case where the server rack is placed near the wall surface and cable connections between rear panels are replaced by THz communication link, a two-model can be applied between rear panels. 3 Wireless communication between servers inside a data center 3 Typical requirements Communication distance A few cm – a few m (proximity) Data speed A few tens of Gbps – a few hundreds of Gbps Propagation environment Office model/two-model (LoS/NLoS) Required BER 8% PER (before retransmission control)
15-14-0539-02-003d-response-to-itu-r-discussion-document.docx