Interface and method for transmitting multi-module orthogonal data in base band pool

Abstract

The present invention relates to an interface transmitting multimode IQ data in a BBU (baseband unit), which applies the LVDS (Low Voltage Differential Signaling) standard and data frames based on a BF (basic frame) format. The BF structure includes eight-channel 16-bit data area signals, a 16-bit FLAG signal and a 16-bit check sum signal; wherein, the eight-channel 16-bit data area signals are respectively connected with interface input ends from Din 9 to Din 2, serially transmit 128-bit IQ data and are evenly assigned to four-channel carrier wave-carried multimode IQ data; the 16-bit FLAG signal is connected with the interface input end Din 1 in order to partition neighboring BFs; the 16-bit check sum signal is connected with the interface input end Din 0 and check the eight-channel data area signals and the FLAG signal. The interface input ends from Din 9 to Din 0 are multiplexed into a LVDS link in order to serially transmit IQ data in the BBU bit by bit, and the speed rate of the BF accords with the speed rate of the radio frame of the CPRI (Common Public Radio Interface) standard. The present invention can conveniently map the IQ data of UMTS (Universal Mobile Telecommunication System) and GSM (Global System for Mobile Communication) into the BF and ensure that the mixed transmission of double-mode IQ data can be conveniently carried out in the BF.

Description

technical field [0001] The invention relates to a method for transmitting orthogonal IQ data of a baseband pool in the field of mobile communication, in particular to a hybrid transmission technology of multi-mode IQ data of 2G and 3G systems in the baseband pool. Background technique [0002] The emergence of the concept of the third generation mobile communication system and its rapid development have brought great changes to the traditional wireless mobile communication system. The cost price of products and the interoperability between devices have become more and more urgent problems faced by device manufacturers, and the system architecture with separated baseband unit and radio frequency unit was born. The method of baseband pool (BBU, Baseband Unit) + radio frequency remote unit (RRU, Radio Remote Unit) has become a common design pattern in the industry. [0003] The BBU&RRU architecture not only has cost advantages, but also has very flexible networking. The commo...

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Problems solved by technology

[0006] In the prior art, there is no such an interface scheme for mixed transmission of IQ data and control signaling of the GSM / WCDMA dual-mode system between the main control unit and the baseband unit in the BBU based on the above considerations.

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