3 Reference configuration

3GPP45.005GSM/EDGE Radio transmission and receptionTS

The reference configuration for the radio subsystem is described in 3GPP TS 45.001.

The micro‑BTS is different from a normal BTS in two ways. Firstly, the range requirements are much reduced whilst the close proximity requirements are more stringent. Secondly, the micro‑BTS is required to be small and cheap to allow external street deployment in large numbers. Because of these differences the micro‑BTS needs a different set of RF parameters to be specified. Where the RF parameters are not different for the micro‑BTS the normal BTS parameters shall apply.

The pico-BTS is an extension of the micro-BTS concept to the indoor environments. The very low delay spread, low speed, and small cell sizes give rise to a need for a different set of RF parameters to be specified.

Multicarrier BTS is a BTS characterized by the ability to, in addition to single carrier operation, process two or more carriers in common active RF components simultaneously, either in multicarrier transmitter only or, in both multicarrier transmitter and multicarrier receiver. The multicarrier BTS is divided into the Wide Area, Medium Range and Local Area classes for different deployment conditions. The requirements for normal BTS applies to all classes of multicarrier BTS unless otherwise stated in this specification.

The vendor shall declare if the multicarrier BTS supports non-contiguous frequency allocation, defined as an allocation where two groups of frequencies are separated with at least 5.4 MHz carrier separation between the innermost carriers. The term maximum Base Station RF bandwidth defines the maximum RF bandwidth in which a multicarrier BTS either transmits or transmits and receives multiple carriers simultaneously.