Mobile communication system and a base station in a mobile communication system

Abstract

A mobile communication system includes base stations, a mobile services switching center, a digital transmission system connecting the base stations to the mobile services switching center, and a network termination of an ISDN base rate access. The digital transmission system has at least one data link connection operating at the rate of the ISDN basic rate access, and digital time division trunk circuits. At least one base station comprises an ISDN basic rate access block for connecting the base station to said data link connection operating at the rate of the ISDN basic rate access. The digital transmission system comprises a switching means positioned between the base station and the mobile services switching center for connecting said ISDN basic rate access block of the base station through the data link connection operating at the rate of the ISDN basic rate access to a digital trunk circuit. The mobile communication system comprises a base station controller between the mobile services switching center and the switching means of the fixed network for controlling the base station. The switching means is arranged to connect said ISDN basic rate access block of the base station through the data link connection operating at the rate of the ISDN basic rate access to the time division trunk circuit leading to the base station controller.

Dependencies are inferred from the claim text.