NTT Access Network service systems Laboratories
HOME  >  ANSL R&D Times  >  No.32_2 (2003_04)  >  NTT provides an economical IP service quickly using optical and wireless technologies!
ANSL R&D Times

NTT provides an economical IP service quickly using optical and wireless technologies!

Fig. 1 shows a service image of WIPAS STEP 2. This system provides a best-effort type IP service, and the wireless bandwidth is shared fairly among the WTs that are connected to the same AP. This system uses a quasi-millimeter-waves in the 26 GHz band, and the maximum wireless transmission rate of this system is 80 Mbit/s. The maximum transmission distance is approximately 1.7 Km (*).
APs (Access points) are installed on telephone poles, and are connected to IP networks by an optical fiber cables. WTs (Wireless terminals) are installed on customer premises. A WT is connected to PC by using Ethernet cables over a WT-adapter.

(*) Standard design values with cumulated 20 minutes of circuit interruption due to rain fall attenuation of radio signal in one year.
In Japan, the maximum transmission distance is approximately 1.2 Km.

 

Fig. 1 WIPAS STEP 2 Service image


Fig. 1 WIPAS STEP 2 Service image