F/TDMA and GSM
Michel Terré, Mylène Pischella, Emmanuelle Vivier · 2013
The second-generation of cellular systems, Global System for Mobile Communication (GSM), General Packet Radio Service (GPRS) and Enhanced Data rates for GSM Evolution (EDGE), use a multiple access technique based on time division multiple access (TDMA) and frequency division multiple access (FDMA). The users served by the same cell are multiplexed on several sub-bands called transceiver receiver (TRX), with a bandwidth 200 of kHz and coupled in uplink and downlink. The frequency reuse factor and the corresponding frequency scheme have an influence on the network performances. Network dimensioning should depend not only on the coverage, but also on the ratio between the useful signal power and the interference power. Transmission in GSM is performed in circuit-switched mode, whereas transmission in GPRS and EDGE is performed in packet-switched mode. In circuit-switched mode, dimensioning should be based on Erlang distributions. This chapter talks about signal to noise plus interference ratio. Controlled Vocabulary Terms frequency division multiaccess; GSM; packet radio networks; signal to noise ratio; time division multiple access