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Base band and RF system synchronization and time delay compensation process

A technology of delay compensation and radio frequency system, applied in multi-carrier systems, time division multiplexing systems, electrical components, etc., can solve the problem of inability to adapt to different transmission protocols, such as delay compensation accuracy

Active Publication Date: 2008-01-02
ZTE CORP
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Problems solved by technology

Solve the problem of inability to adapt to different transmission proto

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  • Base band and RF system synchronization and time delay compensation process

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Abstract

The invention discloses a synchronization and time delay compensation method between base band unit and radio system, wherein a high-speed chain between a base band unit BBU and a radio unit RRU realizes synchronization of BBU and RRU via ascending and descending time marks, at descending direction, via two stages of time delay of BBU and RRU, adjusting the compensation of chain time delay, at ascending direction, using data driving to generate base band receiving interruption to compensate chain time delay. The inventive method can realize the synchronization between base band and radio system, and realize the accurate compensation of time delay. The invention can apply the signals of GSM/EDGE between base band and radio for different transmission protocols, while the invention can be used for data transmission with fixed frame.

Description

technical field [0001] The present invention relates to a wireless communication system in the communication field, in particular to a baseband and radio frequency system synchronization and delay compensation method of GSM (Global System for Mobile Communications) / EDGE (Enhanced Data Rate for GSM Evolution, GSM evolution technology for improving data rate) . Background technique [0002] GSM / EDGE is a TDM (Time Division Multiplexing) system, and the data of the wireless interface is transmitted and received according to the sequence of time slots. Although the 3GPP (Third Generation Partnership Project) protocol does not require strict synchronization of time slots in the entire network, in a cell Or the wireless interface in the synchronous cell must maintain time slot synchronization. In general, a GSM / EDGE base station including several transceivers obtains a synchronous clock source by synchronizing the clock on the network side, synchronizing with GPS (Global Position...

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Application Information

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IPC IPC(8): H04L27/38
CPCH04J3/0682
Inventor 赵志勇王伟王心宇
Owner ZTE CORP
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