Baseband extension radio frequency subsystem RRU testing method, system and analog BBU device

Abstract

The invention provides a method for measuring the baseband remote radio frequency subsystem RRU of WCDMA and TD-SCDMA in 3G technology, a measuring system and an analog BBU device for measuring the baseband remote radio frequency subsystem RRU; the invention is characterized in that: an analog BBU is arranged as an unvarnished transmission channel and connected with the RRU to be tested; the control signaling and IQ data are transferred to RRU after coding by the control platform; the radio frequency output of RRU is connected with a spectrum analyzer to detect the output signals, and connected with an input signal of a signal generator; the digital signals transferred by BBU are transferred to the spectrum analyzer by RRU after DAC converting to detect, and the starting, resetting, module detecting of RRU and measurement of the whole machine in the receiving and sending performances are finished. The invention has the advantages that the problems that the current non-mainstream equipment manufacturers need to have the baseband resource pool BBU to finish testing the downlink uplink IQ data of the RRU and the optical fiber link are solved, the testing cost is greatly reduced, and the testing efficiency is improved.

Description

【Technical field】 [0001] The present invention relates to the field of mobile communication, specifically a testing method and system provided by WCDMA and TD-SCDMA remote baseband radio frequency subsystem RRU in 3G technology, and a simulated BBU device for testing baseband remote radio frequency subsystem RRU. 【Background technique】 [0002] With the development of the third-generation digital communication technology (3G technology), it has become a new generation of mobile communication system that combines wireless communication with multimedia communication such as the Internet. It can process images, music, video and other forms, providing web browsing, Teleconferencing, e-commerce information and other services. In the field of 3G technology, the distributed base station is composed of RRU (Radio Remote Unit) and BBU (Base Band Unit). The RRU and the BBU are respectively responsible for the radio frequency processing part and the baseband processing part of the bas...

AI Technical Summary

Problems solved by technology

[0003] However, although the use of RRU in a large area has become inevitable, new optical network resources need to be introduced. At the same time, since there is no unified standard for the baseband interface, basically whoever’s BBU must use someone else’s RRU, and the slave device In terms of compatibility, the RRU must be matched with the BBU and the RNC. The interface between the RRU and the BBU is generally kept secret by the manufacturer, and the RRU test of the baseband remote radio frequency subsystem in 3G technology is necessary. If a comprehensive The test must have the baseband resource pool BBU equipment to complete, but for manufacturers that cannot manufacture BBU equipment, they need to purchase the BBU of the main equipment manufacturer, and RRU needs to purchase different BBU equipment for different manufacturers. The cost of such hardware and software is very high, which affects the further development of the industry as a whole.

[0004] The China Patent Office has disclosed a patent for invention entitled "Baseband Protocol Data Testing Device and System in the Third Generation Mobile Communication System" (application number: 200510090504.8, publication date: February 21, 2007), from the disclosed technical content Look, its test equipment includes BBU, main control computer, RFU, GPS module, baseband data analyzer (RNC), core network, etc., the required equipment is more and relatively large, and the cost is quite high; the interface used is only SERDES interface, and now the main equipment manufacturers all use the CPRI protocol, this interface is difficult to be compatible, and its data analysis needs to be completed by the main equipment manufacturer to buy a complete set of core network equipment, but it is not easy to buy for second-tier manufacturers. At the same time, The device needs to use multiple DSPs to send six-carrier and eight-antenna baseband signals, which is troublesome

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