A method and device for synchronous processing of air interface data

Abstract

The preset invention embodiments provide a method and an apparatus for synchronization processing of air-interface data, in order to make sure data frames with the same frame number sent synchronously at an air-interface of each wireless equipment, and eliminate the influence generated by the transmission time delay and its jitter. The method includes: a wireless equipment RE0 receiving a data frame Df sent from a wireless equipment control center to the wireless equipment RE0 across a carrying transmission network; the wireless equipment RE0 storing the data frame Df into an internal buffer unit of the wireless equipment RE0; the wireless equipment RE0 reading the data frame Df from the internal buffer unit, and sending the data frame Df from the air-interface at an air-interface sending moment Tsend after the data frame Df is processed by a radio frequency processing unit. The method provided by the preset invention embodiments makes the data frames with the same frame number can be sent synchronously at the air-interface of each the wireless equipment, and can satisfy requirements of some wireless communication protocols which need synchronization strictly on time of air-interface sending data.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for air interface data synchronization processing. Background technique [0002] The Common Public Radio Interface (CommonPublicRadioInterface, CPRI) alliance is an industrial cooperative organization dedicated to the formulation of the main interface specifications between the radio equipment control center (Radio Equipment Control, REC) and the radio equipment (Radio Equipment, RE) inside the radio base station. The Open Base Station Architecture Initiative (OBSAI) is an international organization that aims to promote the standardization of the internal interface of wireless communication base stations. Interface standardization between. [0003] The two most used baseband radio frequency interface protocols in the world are Common Public Radio Interface (CPRI) and Open Base Station Architecture Protocol (OBSAI) interface. Both the Common Public Radio Int...

AI Technical Summary

Problems solved by technology

However, the existing point-to-point or point-to-multipoint transmission schemes using Common Public Radio Interface (CPRI) and Open Base Station Architecture Protocol (OBSAI) interfaces between RECs and REs severely limit the evolution of these technical directions, and urgently need to be solved

Among them, data transmission between REC and RE through bearer transmission network is an important technical direction. This technology breaks the existing data transmission mechanism of Common Public Radio Interface (CPRI) and Open Base Station Architecture Protocol (OBSAI) interface, and introduces relatively Large transmission delay and jitter affect the time synchronization requirements of wireless communication protocols for air interface antenna data transmission

[0006] Since there is a bearer transmission network such as a public telecommunication network (Public Telecom Network, PTN), an optical transmission network (Optical Transmission Network, OTN) or a synchronous digital hierarchy (Synchronous Digital Hierarchy, SDH) between the REC and each RE, an RE cannot communicate from the REC side. Obtain an accurate clock to achieve clock synchronization with REC and other REs, while the processing method of the bearer transmission network (including standards and specifications, etc.) and the number of transmission stages (multi-hop) lead to transmission delays and jitters in these transmission delays , so that the processing time of each RE air interface is not synchronized, which cannot meet the requirements of some wireless communication protocols that require strict synchronization in the time of sending data by the air interface

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