Local Channel Radio Access

Local channel access radio is a local network that uses radio. Also commonly called WLL (Wireless Local Loop) radio system is used only to replace the cable between the central and customers.

Radio frequency division following:

1. 30-30     KHz  VLF
2. 30-300   KHz  LF
3. 0.3 to 3  MHz  MF
4. 3-30      MHz  HF
5. 30-300  MHz  VHF
6. 0.3 to 3 GHz   UHF
7. 3-30     GHz   SHF
8. 30-300 GHz   EHF

Radio transmission media

1. Amplifiers convert electrical signals into an electromagnetic wave signal (TX) or vice versa (RX)
2. Antenna reflector serves to direct the beam
3. Problems are always addressed in the antenna is the strengthening and direction angle
4. Between transmitter and receiver because there is always a loss of receiving antenna can not take all the  power emitted

With technological developments, the receiver can be smaller and more sensitive reception system. This development allows the receiver to move in a restricted area within the meaning of customer aircraft can not work outside the area because it is not registered.

RBS function as a radio transceiver terminal on the side of a telephone exchange. At home functioning radio receiver to receive / send radio signals and convert signals into the phone.

The advantages of using the local network:

1. Reaching a network that is difficult to reach.
2. Flexible in the number of customers served
3. Lower operating costs
4. The price is cheaper because a single radio device can handle many customer
5. Faster installation
6. Good for new areas
7. Could join the local central plain, can also stand alone depending on the number of subscribers RBS.

Weaknesses Using Local Network:

1. Bandwidth limitations of radio frequencies that can be served
2. In general, fixed antenna subsciber with BTS should be able to see each other each other (the antenna should be placed high).