3 Reference configuration

3GPP45.001General descriptionGSM/EDGE Physical layer on the radio pathRelease 17TS

For the purpose of elaborating the physical layer specification, a reference configuration of the transmission chain is used as shown in annex A. This reference configuration also indicates which parts are dealt with in details in which technical specification. It shall be noted that only the transmission part is specified, the receiver being specified only via the overall performance requirements. With reference to this configuration, the technical specifications in the 45 series address the following functional units:

‑ 3GPP TS 45.002: burst building, and burst multiplexing;

‑ 3GPP TS 45.003: coding, reordering and partitioning, interleaving, and for EC-channels blind physical layer transmissions;

‑ 3GPP TS 45.004: differential encoding, modulation, and for EC-GSM-IoT overlaid CDMA;

‑ 3GPP TS 45.005: transmitter, antenna, and receiver (overall performance).

NOTE: 3GPP TS 45.056 addresses the transmitter and receiver of the CTS-FP.

This reference configuration defines also a number of points of vocabulary in relation to the name of bits at different levels in the configuration. It must be outlined, in the case of the encrypted bits, that they are named only with respect to their position after the encryption unit, and not to the fact that they pertain to a flow of information that is actually encrypted.