Final Report
Chapter 4 Trend on Communication Technology
Fiber Loss
Band used for
DWDM System
O-Band
1260 - 1360
1300
E-Band
1360 - 1460
S-Band
1460 - 1530
C-Band
1530 –
1565
1500
1400
L-Band
1565 - 1625
1600
Source: prepared by Survey Team
Figure 4.1-2 Frequency Band used for DWDM System
4.2 Subscriber Access Technology
The access network is an essential element of the telecommunication system, connecting the
subscribers with the network providers. At present, the access network consists of wireless networks,
xDSL, FTTx etc. which will be summarized below:
4.2.1. Wireless Subscriber Network
(1) FWA (Fixed Wireless Access)
FWA is a point-to-multipoint wireless broadband telecommunication system with a capacity to
handle 239 subscribers (high speed IP access-80 Mb/s, service area approx. 2.5 km that can reach
up to 10 km for point-to-point systems). Its radio frequency band is 24～26 GHz.
(2) WiMAX
Compared to WiFi, WiMAX is a new generation technology, which provides upgraded high speed
ultra high volume, high quality wireless transmission services to subscribers and mobile users as
well at an economic rate. Its fixed and mobile applications are supported by IEEE 802.16‐
2004/802.16d and IEEE 802.16-2005/802.16e.
(3) WiFi
Short distance wireless services in compliance with standard IEEE 802.11. License is not required.
However, since industrial frequency band and frequency spectrum are shared, transmission
quality cannot be guaranteed.
(4) LTE
LTE is a groundbreaking new technology that evolved from broadband to mobile communication.
Fourth Generation Mobile Communication Technology, e.g. Orthogonal Frequency Division
Multiple Access (OFDMA）and Multiple Input Multiple Output (MIMO) applications, currently
undergoing trial on the field, are used for the LTE. Current LTE standards are:
4-2