89. C/I Measurement (GSM)

This chapter explains in some detail how GSM C/I measurements are made and why they are useful.

The discussion provided here is centered on the voice service. It should however be noted that the C/I measure is just as useful in the context of packet-switched data services. In fact, towards the high end of the C/I range, speech quality is not further improved, while packet-switched transmissions very clearly do benefit from every extra dB, particularly if EDGE is used.