View source for ARFCN

In [[GSM]] cellular networks, an '''absolute radio-frequency channel number''' ('''ARFCN''') is a code that specifies a pair of physical radio carriers and channels used for transmission and reception on the [[Um interface]], one for the uplink signal and one for the downlink signal. ARFCNs are defined in GSM Specification 05.05 Section 2.

Each ARFCN has a bandwidth of 270.833 kHz. ARFCNs use a channel spacing of 200 kHz in any given GSM band. Uplink-downlink spacing is typically 45 or 50 MHz.

Different frequencies (ARFCNs) are used for the frequency-based component of GSMs multiple access scheme (FDMA — [[frequency-division multiple access]]). Together with the time-based component (TDMA — [[time division multiple access]]) the physical channel is defined by selecting a certain ARFCN and a certain time slot. Note not to confuse this physical channel with the logical channels (e.g. BCH — [[Broadcast Control Channel]]) that are time-multiplexed onto it under the rules of GSM Specification 05.03.

==Referensi==

* http://en.wikipedia.org/wiki/Absolute_radio-frequency_channel_number
* http://www.aubraux.com/design/arfcn-calculator.php
* http://julitra.wordpress.com/2009/01/24/melihat-kembali-alokasi-frekuensi-operator-gsm/

==Pranala Menarik==

* [[OpenBTS]]