ARFCN
Dalam jaringan selular GSM, sebuah absolute radio-frequency channel number (ARFCN) adalah kode yang menentukan sepasang carrier radio dan channel yang digunakan untuk pemancar dan penerima di Um interface, satu untuk sinyal uplink dan satu untuk sinyal downlink. ARFCN di definisikan di GSM Specification 05.05 Section 2.
Setiap ARFCN mempunyai bandwidth 270.833 kHz. ARFCN menggunakan spasi kanal 200 kHz di band GSM. Spasi Uplink-downlink biasanya 45 atau 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.
ARFCN Indonesia
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/