Patent ID: 8842654

Claim:
A method for realizing compatibility between a Wideband Code Division Multiple Access (WCDMA) system mode and a Global System for Mobile Communication (GSM) system mode, comprising the following steps: A. in a downlink data path of a base station, mapping In-phase/Quadrature (IQ) data of the GSM system to a Common Public Radio Interface (CPRI) to make the ratio between the mapped IQ data rate of the GSM system and the CPRI basic frame rate to be a constant, multiplexing the mapped IQ data of the GSM system with IQ data of the WCDMA system, before IQ data interleaving and framing a CPRI base frame; and B. in an uplink data path of the base station, de-multiplexing the mapped IQ data of the GSM system and the IQ data of the WCDMA system after performing de-framing and IQ data de-interleaving on CPRI base frames, and de-mapping the de-multiplexed IQ data of the GSM system according to the predetermined rate; wherein, the mapping comprises: determining amount of CPRI base frames transmitted in duration of a super frame of the GSM system; and gradually dividing the CPRI base frames transmitted in the duration of the super frame, wherein the amount of CPRI base frames contained in each unit in the last grade is N, wherein N is a positive integer; wherein the multiplexing comprises: dividing data area of each CPRI base frame into K Antenna-Carrier (A×C) subchannels, wherein K is a positive integer; and using Y CPRI base frames as a multiplexing unit, and multiplexing in the multiplexing unit the mapped IQ data of the GSM system with the IQ data of the WCDMA system by mapping the mapped IQ data of the GSM system and the IQ data of the WCDMA system to corresponding subchannels according to the radio transmission modes, wherein Y is a positive integer, and N is divided by Y; the method further comprising: adjusting, by a control layer, the radio transmission modes of the K A×C subchannels in the multiplexing unit according to data amount of the WCDMA system and data amount of the GSM system transmitted in the downlink data path of the base station.