METHODS AND DEVICES FOR COMMUNICATING OVER A RADIO CHANNEL

摘要

A method in a base station for transmitting data on a radio channel and the base station (NodeB) are disclosed. The base station comprises a control unit arranged to determine a first preamble format to be used in a cell of the base station and to determine a basic cyclic shift value from a set of basic cyclic shift values. The set to use is indicated by the first preamble format and the base station further comprises a transmitting arrangement adapted to transmit data comprising indication of the determined first preamble format and a basic cyclic shift value pointer indicating the basic cyclic shift value in the set of basic cyclic shift values. Further disclosed is a method in an user equipment (UE) for processing a signal and the user equipment. The user equipment comprises a receiving arrangement adapted to receive data comprising a basic cyclic shift value pointer indicating a basic cyclic shift value and an indication of a first preamble format from base station on a radio channel, and a control unit arranged to determine a preamble format to be used in a random access procedure from the indication in the received data and to select a basic cyclic shift value in a set of basic cyclic shift values based on the basic cyclic shift value pointer. The set to use is indicated by the preamble format.