WO2016201619A1 - 一种信号转换方法,信号转换装置以及系统 - Google Patents
一种信号转换方法,信号转换装置以及系统 Download PDFInfo
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- WO2016201619A1 WO2016201619A1 PCT/CN2015/081546 CN2015081546W WO2016201619A1 WO 2016201619 A1 WO2016201619 A1 WO 2016201619A1 CN 2015081546 W CN2015081546 W CN 2015081546W WO 2016201619 A1 WO2016201619 A1 WO 2016201619A1
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- synchronization signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
Definitions
- Embodiments of the present invention relate to the field of communications, and in particular, to a signal conversion method, a signal conversion apparatus, and a system.
- the wireless transmission system needs to provide a clock reference signal to the transmission network.
- TDD Time Division Duplexing
- FDD Frequency Division Duplexing
- GPS Global Positioning System
- GLONASS Global Navigation Satellite System
- Beidou and other synchronous methods from the satellite to obtain Coordinated Universal Time (UTC) standard pulse per second (1PPS), compared with the clock signal generated by the base station local crystal oscillator, after software lock frequency lock , generating a frequency reference signal providing system that satisfies the protocol requirements.
- UTC Coordinated Universal Time
- LTE-A or LTE+ With the application of Long Term Evolution Advanced (LTE-A or LTE+), Coordinated Multiple Points (Coordinated Multiple Points, Comp), Inter-Cell Interference Coordination (ICIC),
- LTE-A or LTE+ Coordinated Multiple Points
- Comp Coordinated Multiple Points
- IOC Inter-Cell Interference Coordination
- the company proposes that the Radio Remote Unit (RRU) integrates the GPS function or provides the RGPS interface, and solves the problem that the GPS signal (mainly the 1PPS synchronization signal) is connected to the base station.
- RRU Radio Remote Unit
- One method currently adopted is to add RGPS physical interface and processing circuit in the RRU, and integrate the GPS signal access application for the RRU, and provide a dedicated power supply interface and signal interface.
- Embodiments of the present invention provide a signal conversion method, a signal conversion apparatus, and a system for reducing PCB area and RRU volume in the case of implementing access of a 1PPS synchronization signal of an RRU.
- a first aspect of the embodiments of the present invention provides a signal conversion method, where the signal conversion device is connected to the RRU through a common public wireless interface CPRI connector on the radio remote unit RRU.
- the method includes:
- the signal conversion device acquires a first synchronization signal, and the first synchronization signal is a second pulse 1PPS synchronization signal;
- the signal conversion device converts a frame format of the first synchronization signal to obtain a second synchronization signal, and a frame format of the second synchronization signal is a frame format supported by the CPRI;
- the signal conversion device transparently transmits the second synchronization signal to the RRU through the CPRI connector.
- the signal conversion device is connected to a remote positioning global positioning system (RGPS) module;
- RGPS remote positioning global positioning system
- the acquiring, by the signal conversion device, the first synchronization signal specifically includes:
- the signal conversion device receives the first synchronization signal sent by the RGPS module.
- the signal conversion device is connected to a global positioning system GPS antenna
- the acquiring, by the signal conversion device, the first synchronization signal specifically includes:
- the signal conversion device receives a radio frequency GPS signal transmitted by the GPS antenna
- the signal conversion device demodulates the radio frequency GPS signal to obtain the first synchronization signal.
- the GPS antenna is integrated in the signal conversion device.
- a second aspect of the embodiments of the present invention provides a signal conversion apparatus, including:
- a first connection module configured to connect to the RRU through a free CPRI connector on the RRU
- An acquiring module configured to acquire a first synchronization signal, where the first synchronization signal is a second pulse 1PPS synchronization signal;
- a conversion module configured to convert a frame format of the first synchronization signal acquired by the acquiring module, to obtain a second synchronization signal, where a frame format of the second synchronization signal is a frame format supported by the CPRI;
- the transparent transmission module is configured to transparently transmit the second synchronization signal converted by the conversion module to the RRU through the CPRI connector.
- the apparatus further includes:
- a second connection module configured to be connected to the RGPS module
- the acquiring module is specifically configured to receive the first synchronization signal sent by the RGPS module.
- the device further includes:
- a third connection module configured to be connected to the GPS antenna
- the obtaining module specifically includes:
- a receiving unit configured to receive a radio frequency GPS signal sent by the GPS antenna
- a demodulation unit configured to demodulate the radio frequency GPS signal to obtain the first synchronization signal.
- the apparatus further includes:
- a GPS antenna is configured to receive the RF GPS signal and send it to the receiving unit.
- a third aspect of the embodiments of the present invention provides a signal conversion apparatus, where the signal conversion apparatus is connected to the RRU through a free CPRI connector on the RRU, and the apparatus includes:
- the processor is configured to perform the following steps by invoking an operation instruction stored by the memory:
- first synchronization signal is a second pulse 1PPS synchronization signal
- the signal conversion device is connected to the RGPS module
- the signal conversion device is connected to a GPS antenna
- the GPS antenna is integrated in the signal conversion apparatus.
- a fourth aspect of the embodiments of the present invention provides a signal conversion system, including:
- the RRU, and the signal conversion device according to any one of the implementation manners of the second aspect to the second aspect of the present invention, or the third to third aspects of the embodiment of the present invention A signal conversion apparatus according to any one of the three implementation modes.
- the frame format of the acquired 1PPS synchronization signal is directly converted by the signal conversion device to obtain a second synchronization signal
- the frame format of the second synchronization signal is a frame format supported by the CPRI
- the signal conversion device passes An idle CPRI connector on the RRU is connected to the RRU, and the signal conversion device transparently transmits the converted second synchronization signal to the RRU through the CPRI connector, thereby implementing RRG RGPS signal access, and only needs to use the RRU.
- the free CPRI connector does not require any upgrade of the RRU on the hardware, reducing the PCB area and RRU volume.
- FIG. 1 is a schematic diagram showing a connection relationship between a signal conversion device and other devices according to an embodiment of the present invention
- FIG. 2 is another schematic diagram of a connection relationship between a signal conversion device and other devices according to an embodiment of the present invention
- FIG. 3 is another schematic diagram of a connection relationship between a signal conversion apparatus and other devices according to an embodiment of the present invention.
- FIG. 4 is a schematic flowchart of a signal conversion method according to an embodiment of the present invention.
- FIG. 5 is a schematic structural diagram of a signal conversion apparatus according to an embodiment of the present invention.
- FIG. 6 is another schematic structural diagram of a signal conversion apparatus according to an embodiment of the present invention.
- FIG. 7 is another schematic structural diagram of a signal conversion apparatus according to an embodiment of the present invention.
- FIG. 8 is another schematic structural diagram of a signal conversion apparatus according to an embodiment of the present invention.
- FIG. 9 is another schematic structural diagram of a signal conversion apparatus according to an embodiment of the present invention.
- the signal conversion device accesses the RGPS signal, converts the obtained 1PPS synchronization signal into a frame format that supports CPRI, accesses the RRU through the RRI idle CPRI connector, and finally transmits the 1PPS synchronization signal through the CPRI connector.
- the BBU To achieve base station synchronization.
- the signal conversion device, the RRU, and other related devices have at least the following three connection modes:
- FIG. 1 is a schematic diagram of a connection relationship between a signal conversion device and other devices according to an embodiment of the present invention, wherein the signal conversion device is respectively connected to an idle CPRI connector and an RGPS module on the RRU.
- the RGPS module can be a commercial RGPS module with a GPS antenna, and the RGPS module can directly demodulate the RF GPS signal received by the GPS antenna into a 1PPS synchronization signal and then send the signal to the signal conversion device.
- the interface of the signal conversion device and the RGPS module may be an electrical characteristic (RS422) interface of the balanced voltage digital interface circuit, or an interface that supports the transmission of the 1PPS synchronization signal, which is not limited herein.
- FIG. 2 is another schematic diagram of a connection relationship between a signal conversion device and other devices according to an embodiment of the present invention, wherein the signal conversion device is respectively connected to an idle CPRI connector on the RRU and a GPS antenna.
- the GPS antenna can receive the RF GPS signal and send it to the signal conversion device.
- FIG. 3 is another schematic diagram of a connection relationship between a signal conversion device and other devices according to an embodiment of the present invention, wherein the signal conversion device is connected to an idle CPRI connector on the RRU, and the GPS antenna is built in the signal conversion device.
- the radio frequency GPS signal can be received. After the built-in GPS antenna receives the radio frequency GPS signal, it can be sent to other modules in the signal conversion device for processing.
- the radio frequency GPS signal received by the GPS antenna, the first synchronization signal obtained by demodulating the GPS signal, and the frame format of the first synchronization signal are converted.
- the second synchronization signal which includes the 1PPS synchronization signal, has different ways of carrying the 1PPS synchronization signal in each signal.
- an embodiment of a signal conversion method in an embodiment of the present invention includes:
- the signal conversion device acquires a first synchronization signal, where the first synchronization signal is a second pulse 1PPS synchronization signal.
- the specific manner in which the signal conversion device acquires the first synchronization signal is also different:
- the signal conversion device acquiring the first synchronization signal specifically includes: the signal conversion device receiving the first synchronization signal sent by the RGPS module. ;
- the signal conversion device acquiring the first synchronization signal specifically includes: first receiving the RF GPS signal sent by the GPS antenna, and then demodulating The RF GPS signal obtains the first synchronization signal;
- the signal conversion device has a built-in GPS antenna, and then the GPS antenna built in the signal conversion device receives the RF GPS signal, and then demodulates the RF GPS signal to obtain the first synchronization. signal.
- the specific manner of acquiring the first synchronization signal may be any one of the above, which is not limited herein.
- the signal conversion device converts a frame format of the first synchronization signal to obtain a second synchronization signal, where a frame format of the second synchronization signal is a frame format supported by the CPRI.
- the signal conversion device After obtaining the first synchronization signal, the signal conversion device converts the frame format of the first synchronization signal to obtain a second synchronization signal, and the frame format of the second synchronization signal is a frame format supported by the CPRI connector on the RRU.
- the connection mode shown in FIG. 1 is used (the signal conversion device is connected to the RGPS module), for example, if the RGPS module and the signal conversion device are connected through the RS422 interface, the first synchronization signal received by the signal conversion device
- the frame format is the frame format supported by the RS422 interface. Need It is to be noted that, in actual application, according to different interfaces used by the RGPS module, the signal conversion device may also be connected to the RGPS module by using other interfaces, which is not limited herein.
- the frame format of the first synchronization signal is The RGPS module outputs a frame format supported by the interface of the first synchronization signal, and the specific frame format is not limited herein.
- the signal conversion device demodulates the radio frequency GPS signal, and the obtained first synchronization signal may also carry the 1PPS synchronization signal in a plurality of different frame formats, where Not limited.
- the protocol specification for the frame format supported by CPRI has both a common part and a private part that is customized by each vendor, the frame formats supported by various CPRIs are not completely different depending on the private parts customized by each vendor.
- the type of the frame format supported by the CPRI can be selected according to the actual application, and is not limited herein.
- a second synchronization signal For converting the frame format of the first synchronization signal, a second synchronization signal is obtained:
- the frame format of the second synchronization signal is different, and the specific conversion process of converting the first synchronization signal into the second synchronization signal is not completely the same. limited.
- the signal conversion device transparently transmits the second synchronization signal to the RRU through the CPRI connector.
- the signal conversion device converts the frame format of the first synchronization signal to obtain a second synchronization signal of the frame format supporting the CPRI, and the signal conversion device transparently transmits the second synchronization signal to the CPRI connector connected to the signal conversion device on the RRU.
- the RRU The RRU.
- the frame format of the acquired 1PPS synchronization signal is directly converted by the signal conversion device to obtain a second synchronization signal
- the frame format of the second synchronization signal is a frame format supported by the CPRI
- the signal conversion device passes An idle CPRI connector on the RRU is connected to the RRU, and the signal conversion device transparently transmits the converted second synchronization signal to the RRU through the CPRI connector, thereby implementing RRG RGPS signal access, and only needs to use the RRU.
- the free CPRI connector does not require any upgrade of the RRU on the hardware, which reduces the waterproof design difficulty of the RRU, the PCB area and the RRU volume, and reduces the cost of the RRU.
- RRG hardware changes can be implemented, and RGPS can be realized through different signal conversion device solutions.
- the signal is transparently transmitted to the RRU through the CPRI, which is beneficial to the implementation of the entire network synchronization.
- the obtained 1PPS synchronization signal can be transparently transmitted to the BBU, and the BBU completes phase discrimination of the 1PPS and the system clock.
- the initial phase deviation of 10 ms of the RPP 1PPS and the RRU synchronous BBU is compared and further processed.
- an embodiment of the signal conversion apparatus in the embodiment of the present invention includes:
- a first connection module 501 configured to connect to the RRU through a free CPRI connector on the RRU
- the obtaining module 502 is configured to acquire a first synchronization signal, where the first synchronization signal is a second pulse 1PPS synchronization signal;
- a conversion module 503 configured to convert a frame format of the first synchronization signal acquired by the acquiring module 502, to obtain a second synchronization signal, where a frame format of the second synchronization signal is a frame format supported by the CPRI;
- the transparent transmission module 504 is configured to transparently transmit the second synchronization signal converted by the conversion module 503 to the RRU through the CPRI connector.
- the conversion module 503 is used to directly convert the frame format of the 1PPS synchronization signal acquired by the acquisition module 502, and obtain a second synchronization signal.
- the frame format of the second synchronization signal is a frame format supported by the CPRI
- the connection module 501 is connected to the RRU through the idle CPRI connector on the RRU, and the transparent transmission module 504 transparently transmits the converted second synchronization signal to the RRU through the CPRI connector, thereby realizing the access of the RRU signal of the RRU, and Only need to use the free CPRI connector on the RRU, no need to upgrade the RRU on the hardware, reduce the waterproof design difficulty of the RRU, PCB area and RRU volume, reducing the cost of the RRU.
- the obtaining module 502 acquires the first synchronization signal.
- the specific manner in which the acquisition module 502 acquires the first synchronization signal may be various.
- the signal conversion apparatus according to the embodiment shown in FIG. 5 further includes:
- the obtaining module 502 is specifically configured to receive the RGPS connected to the second connection module 601. The first synchronization signal sent by the module.
- the second connection module 601 is connected to the RPGS module, and the acquisition module 502 directly receives the first synchronization signal, does not need to perform analysis of the RF GPS signal, improves the processing efficiency of the signal conversion device, and directly utilizes the commercial module.
- the RGPS module is beneficial for large-scale applications.
- the signal conversion apparatus of the embodiment shown in FIG. 5 further includes:
- a third connection module 701, configured to be connected to the GPS antenna
- the obtaining module 502 specifically includes:
- the receiving unit 702 is configured to receive a radio frequency GPS signal sent by a GPS antenna connected to the third connection module 701.
- the demodulation unit 703 is configured to demodulate the radio frequency GPS signal received by the receiving unit 702 to obtain the first synchronization signal.
- the third connection module 701 is connected to the GPS antenna, and after receiving the radio frequency GPS signal, the demodulation unit 703 demodulates the radio frequency GPS signal to obtain the first synchronization signal, which can be processed without the RGPS module. Obtaining the first synchronization signal enhances the adaptability of the signal conversion device to various practical application scenarios.
- the signal conversion apparatus according to the embodiment shown in FIG. 7 further includes:
- the GPS antenna 801 is configured to receive the radio frequency GPS signal and send the signal to the receiving unit 601.
- the GPS antenna 801 is integrated in the signal conversion device, which saves installation and deployment space and improves the adaptability of the signal conversion device to various environments.
- the RGPS signal can be transparently transmitted to the RRU through the CPRI through the solution of different signal conversion devices without relying on the RRU hardware modification, which is beneficial to the implementation of the entire network synchronization.
- the signal conversion apparatus is connected to the RRU through a free CPRI connector on the RRU, and the signal conversion apparatus 900 includes:
- the processor 901, the memory 902, and the transceiver 903 can pass Bus or other connection, wherein the connection through the bus is taken as an example in FIG. 9;
- the processor 901 is configured to perform the following steps by calling an operation instruction stored in the memory 902:
- first synchronization signal is a second pulse 1PPS synchronization signal
- the signal conversion device is coupled to the RGPS module
- the signal conversion device is coupled to a GPS antenna
- the GPS antenna is integrated in the signal conversion device.
- the embodiment of the invention further includes a signal conversion system, comprising:
- the disclosed system, apparatus, and method may be implemented in other manners.
- the device embodiments described above are merely illustrative.
- the division of the unit is only a logical function division.
- there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed.
- the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit. It can be electrical, mechanical or other form.
- the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
- each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
- the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
- the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
- the technical solution of the present invention which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium.
- a number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
- the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .
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Abstract
本发明实施例公开了一种信号转换方法、信号转换装置以及系统,用于在实现RRU的1PPS同步信号的接入的情况下,降低RRU的防水设计难度,PCB面积和RRU体积,减少RRU的成本。本发明实施例方法包括:直接采用信号转换装置转换获取到的1PPS同步信号的帧格式,得到第二同步信号,该第二同步信号的帧格式为CPRI支持的帧格式,将转换后的第二同步信号通过RRU上空闲的CPRI连接器透传给RRU。
Description
本发明实施例涉及通信领域,尤其涉及一种信号转换方法、信号转换装置以及系统。
无线传输系统为了保证信息在传输过程中没有内容丢失和失真,需要同步网络给传输网络提供时钟参考信号。在时分双工(Time Division Duplexing,TDD)/频分双工(Frequency Division Duplexing,FDD)系统中,采用全球定位系统(Global Positioning System,GPS)/全球卫星导航系统(Global Navigation Satellite System,GLONASS)/北斗等同步方式,从卫星获取基于协调世界时(Coordinated Universal Time,UTC)的标准秒脉冲(pulse per second,1PPS),和基站本地晶振产生的时钟信号进行比较,经过软件锁频锁相后,产生满足协议要求的频率基准信号提供系统使用。
随着长期演进技术的后续演进(Long Term Evolution Advanced,LTE-A或LTE+)、站间Coordinated Multiple Points(Coordinated Multiple Points,Comp)、小区间干扰协调(Inter Cell Interference Coordination,ICIC)等业务应用,基站需要GPS的场景会有所增加。虽然室内基带处理单元(Base band Unite,BBU)可以接入远端的全球定位系统(Remote Global Positioning System,RGPS)信号,但部分应用场景,由于走线距离过远,或无法布线等原因,运营商提出射频拉远单元(Radio Remote Unit,RRU)集成GPS功能或提供RGPS接口的需求,解决GPS信号(主要是1PPS同步信号)就近接入基站的问题。
目前采用的一种方式是在RRU中新增RGPS物理接口和处理电路,为这种RRU集成GPS信号接入的应用,并提供专用的供电接口和信号接口。
然而,在实际应用中,并非所有的RRU都需要集成GPS功能,例如在支持G/C/U/L多模的频分双工(Frequency Divided Duplex,FDD)平台上,对RGPS的需求不强。为了少部分场景而为RRU增加RGPS接口,需要同时增加相应结构以及防雷电路,增大了印制电路板(Printed Circuit Board,PCB)
面积和RRU的体积。
发明内容
本发明实施例提供了一种信号转换方法、信号转换装置以及系统,用于在实现RRU的1PPS同步信号的接入的情况下,降低PCB面积和RRU体积。
本发明实施例第一方面提供了一种信号转换方法,信号转换装置通过射频拉远单元RRU上空闲的通用公共无线接口CPRI连接器与所述RRU连接,所述方法包括:
所述信号转换装置获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
所述信号转换装置转换所述第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
所述信号转换装置将所述第二同步信号通过所述CPRI连接器透传给所述RRU。
结合本发明实施例的第一方面,本发明实施例第一方面的第一种实现方式中,所述信号转换装置与远端的全球定位系统RGPS模块连接;
所述信号转换装置获取第一同步信号具体包括:
所述信号转换装置接收所述RGPS模块发送的所述第一同步信号。
结合本发明实施例的第一方面,本发明实施例第一方面的第二种实现方式中,所述信号转换装置与全球定位系统GPS天线连接;
所述信号转换装置获取第一同步信号具体包括:
所述信号转换装置接收所述GPS天线发送的射频GPS信号;
所述信号转换装置解调所述射频GPS信号,得到所述第一同步信号。
结合本发明实施例第一方面的第二种实现方式,本发明实施例第一方面的第三种实现方式中,所述GPS天线集成在所述信号转换装置中。
本发明实施例第二方面提供了一种信号转换装置,包括:
第一连接模块,用于通过RRU上空闲的CPRI连接器与所述RRU连接
获取模块,用于获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
转换模块,用于转换所述获取模块获取的第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
透传模块,用于将所述转换模块转换得到的第二同步信号通过所述CPRI连接器透传给所述RRU。
结合本发明实施例的第二方面,本发明实施例第二方面的第一种实现方式中,所述装置还包括:
第二连接模块,用于与RGPS模块连接;
所述获取模块具体用于,接收所述RGPS模块发送的所述第一同步信号。
结合本发明实施例的第二方面,本发明实施例第二方面的第二种实现方式中,所述装置还包括:
第三连接模块,用于与GPS天线连接;
所述获取模块具体包括:
接收单元,用于接收所述GPS天线发送的射频GPS信号;
解调单元,用于解调所述射频GPS信号,得到所述第一同步信号。
结合本发明实施例第二方面的第二种实现方式,本发明实施例第二方面的第三种实现方式中,所述装置还包括:
GPS天线,用于接收射频GPS信号,并发送给所述接收单元。
本发明实施例第三方面提供了一种信号转换装置,信号转换装置通过RRU上空闲的CPRI连接器与所述RRU连接,所述装置包括:
处理器,存储器,收发器;
通过调用所述存储器存储的操作指令,所述处理器用于执行如下步骤:
获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
将所述第一同步信号转换为第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
指示所述收发器将所述第二同步信号通过所述CPRI透传给所述RRU。
结合本发明实施例的第三方面,本发明实施例第三方面的第一种实现方式中,所述信号转换装置与RGPS模块连接;
所述处理器执行所述获取第一同步信号的步骤时,具体执行如下步骤:
指示所述收发器接收所述RGPS模块发送的所述第一同步信号。
结合本发明实施例的第三方面,本发明实施例第三方面的第二种实现方式中,所述信号转换装置与GPS天线连接;
所述处理器执行所述获取第一同步信号的步骤时,具体执行如下步骤:
指示所述收发器接收所述GPS天线发送的射频GPS信号;
解调所述射频GPS信号,得到所述第一同步信号。
结合本发明实施例第三方面的第二种实现方式,本发明实施例第三方面的第三种实现方式中,所述GPS天线集成在所述信号转换装置中。
本发明实施例第四方面提供了一种信号转换系统,包括:
RRU,和本发明实施例的第二方面至第二方面的第三种实现方式中任一种实现方式所述的信号转换装置,或,本发明实施例的第三方面至第三方面的第三种实现方式中任一种实现方式所述的信号转换装置。
本发明实施例中,直接采用信号转换装置转换获取到的1PPS同步信号的帧格式,得到第二同步信号,该第二同步信号的帧格式为CPRI支持的帧格式,又由于该信号转换装置通过RRU上空闲的CPRI连接器与该RRU连接,该信号转换装置将转换后的第二同步信号通过该CPRI连接器透传给RRU,实现了RRU的RGPS信号的接入,且由于仅需要使用RRU上空闲的CPRI连接器,在硬件上不需要对RRU进行任何的升级改造,降低了PCB面积和RRU体积。
图1为本发明实施例中信号转换装置与其他设备连接关系一个示意图;
图2为本发明实施例中信号转换装置与其他设备连接关系另一个示意图;
图3为本发明实施例中信号转换装置与其他设备连接关系另一个示意图;
图4为本发明实施例中信号转换方法一个流程示意图;
图5为本发明实施例中信号转换装置一个结构示意图;
图6为本发明实施例中信号转换装置另一个结构示意图;
图7为本发明实施例中信号转换装置另一个结构示意图;
图8为本发明实施例中信号转换装置另一个结构示意图;
图9为本发明实施例中信号转换装置另一个结构示意图。
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
本发明实施例中信号转换装置接入RGPS信号,将得到的1PPS同步信号转换为支持CPRI的帧格式,通过RRU空闲的CPRI连接器接入RRU,最终将1PPS同步信号通过该CPRI连接器透传给BBU,从而实现基站同步。
本发明实施例中信号转换装置、RRU和其他相关设备至少有以下三种连接方式:
请参阅图1,为本发明实施例中信号转换装置与其他设备连接关系一个示意图,其中,信号转换装置分别连接RRU上空闲的CPRI连接器以及RGPS模块。
可以理解的是,该RGPS模块可以为商用的RGPS模块,内附GPS天线,可以由该RGPS模块直接将GPS天线接收的射频GPS信号解调为1PPS同步信号再发送给信号转换装置。信号转换装置与该RGPS模块连接的接口可以为平衡电压数字接口电路的电气特性(RS422)接口,也可以为其他支持1PPS同步信号传送的接口,此处不作限定。
请参阅图2,为本发明实施例中信号转换装置与其他设备连接关系的另一个示意图,其中,信号转换装置分别连接RRU上空闲的CPRI连接器以及GPS天线。
可以理解的是,该GPS天线可以接收射频GPS信号,并将其发送给信号转换装置。
请参阅图3,为本发明实施例中信号转换装置与其他设备连接关系的另一个示意图,其中信号转换装置连接RRU上空闲的CPRI连接器,该信号转换装置中内置有GPS天线,该GPS天线可以接收射频GPS信号,该内置的GPS天线接收射频GPS信号后,可以发送给该信号转换装置中其他模块处理。
需要说明的是,本发明实施例中,GPS天线接收到的射频GPS信号,解调该GPS信号得到的第一同步信号,以及转换第一同步信号的帧格式得到的
第二同步信号,这三种信号中均包含有1PPS同步信号,但是各信号中承载1PPS同步信号的方式不同。
下面结合上述各种连接关系,对本发明实施例中的信号转换方法进行描述:
请参阅图4,本发明实施例中信号转换方法一个实施例包括:
401、信号转换装置获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
本步骤中,根据信号转换装置与其他设备连接方式的不同,信号转换装置获取第一同步信号的具体方式也有所区别:
可选的,若采用图1所示的连接方式,该信号转换装置与RGPS模块相连,则该信号转换装置获取第一同步信号具体包括:该信号转换装置接收该RGPS模块发送的第一同步信号;
可选的,若采用图2所示的连接方式,该信号转换装置与GPS天线相连,则该信号转换装置获取第一同步信号具体包括:先接收该GPS天线发送的射频GPS信号,再解调该射频GPS信号,得到该第一同步信号;
可选的,若采用图3所示的连接方式,该信号转换装置内置GPS天线,则先由该信号转换装置中内置的GPS天线接收射频GPS信号,然后解调该射频GPS信号得到第一同步信号。
在实际应用中,根据该信号转换装置与其他装置的连接关系,获取第一同步信号的具体方式可以为以上任一种,此处不作限定。
402、所述信号转换装置转换所述第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
信号转换装置得到该第一同步信号后,转换该第一同步信号的帧格式,得到第二同步信号,该第二同步信号的帧格式为RRU上CPRI连接器支持的帧格式。
其中,对于第一同步信号的帧格式:
可以理解的是,若采用图1所示的连接方式(该信号转换装置与RGPS模块相连),例如若该RGPS模块与信号转换装置通过RS422接口连接,则信号转换装置接收到的第一同步信号的帧格式为RS422接口支持的帧格式。需要
说明的是,在实际应用中,根据RGPS模块采用的接口不同,该信号转换装置也可以采用其他的接口与该RGPS模块连接,此处不作限定,此时,该第一同步信号的帧格式为该RGPS模块输出第一同步信号的接口所支持的帧格式,具体帧格式此处不作限定。
同理,若采用图2或图3所述的连接方式,信号转换装置解调射频GPS信号,得到的第一同步信号中,也可以采用多种不同的帧格式承载该1PPS同步信号,此处不作限定。
对于第二同步信号的帧格式:
由于对CPRI支持的帧格式的协议规定中既有公共部分,也有需要有各厂商自定义的私有部分,因此,根据各厂商自定义的私有部分的不同,各种CPRI支持的帧格式不完全相同,选择何种类型的CPRI支持的帧格式,可以根据实际应用情况自行选择,此处不作限定。
对于转换第一同步信号的帧格式,得到第二同步信号:
需要说明的是,根据第一同步信号的帧格式选取的不同,第二同步信号的帧格式选取的不同,第一同步信号转换为第二同步信号的具体转换过程也不完全相同,此处不作限定。
403、所述信号转换装置将所述第二同步信号通过所述CPRI连接器透传给所述RRU。
信号转换装置转换第一同步信号的帧格式,得到帧格式支持CPRI的第二同步信号后,该信号转换装置将该第二同步信号通过RRU上与该信号转换装置连接的CPRI连接器透传给该RRU。
本发明实施例中,直接采用信号转换装置转换获取到的1PPS同步信号的帧格式,得到第二同步信号,该第二同步信号的帧格式为CPRI支持的帧格式,又由于该信号转换装置通过RRU上空闲的CPRI连接器与该RRU连接,该信号转换装置将转换后的第二同步信号通过该CPRI连接器透传给RRU,实现了RRU的RGPS信号的接入,且由于仅需要使用RRU上空闲的CPRI连接器,在硬件上不需要对RRU进行任何的升级改造,降低了RRU的防水设计难度,PCB面积和RRU体积,减少了RRU的成本。并且对于存量和新建站点,不依赖RRU硬件更改,通过不同信号转换装置的解决方案,都可以实现RGPS
信号通过CPRI透传到RRU,有利于全网同步的实施。
在实际应用中,RRU得到信号转换装置透传的第二同步信号后,可以将得到的1PPS同步信号透传给BBU,由BBU完成1PPS和系统时钟的鉴相。同时比较RGPS的1PPS和RRU同步BBU的10ms的起始相位偏差,并进行后续处理。
下面对本发明实施例中信号转换装置进行描述,请参阅图5,本发明实施例中信号转换装置一个实施例包括:
第一连接模块501,用于通过RRU上空闲的CPRI连接器与所述RRU连接
获取模块502,用于获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
转换模块503,用于转换所述获取模块502获取的第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
透传模块504,用于将所述转换模块503转换得到的第二同步信号通过所述CPRI连接器透传给所述RRU。
本发明实施例中,直接采用转换模块503转换获取模块502获取到的1PPS同步信号的帧格式,得到第二同步信号,该第二同步信号的帧格式为CPRI支持的帧格式,又由于第一连接模块501通过RRU上空闲的CPRI连接器与该RRU连接,透传模块504将转换后的第二同步信号通过该CPRI连接器透传给RRU,实现了RRU的RGPS信号的接入,且由于仅需要使用RRU上空闲的CPRI连接器,在硬件上不需要对RRU进行任何的升级改造,降低了RRU的防水设计难度,PCB面积和RRU体积,减少了RRU的成本。
上面实施例中,获取模块502获取第一同步信号,在实际应用中,根据信号转换装置与RGPS模块或GPS天线连接方式的不同,该获取模块502获取第一同步信号的具体方式可以有多种,
可选的,请参阅图6,作为本发明实施例中信号转换装置另一个实施例,上述图5所示实施例所述的信号转换装置还包括:
第二连接模块601,用于与RGPS模块连接;
所述获取模块502具体用于,接收与所述第二连接模块601连接的RGPS
模块发送的所述第一同步信号。
本发明实施例中,第二连接模块601与RPGS模块连接,获取模块502直接接收第一同步信号,不需要进行射频GPS信号的解析,提高了信号转换装置的处理效率,且直接利用商用的模块化的RGPS模块,有利于大规模应用。
可选的,请参阅图7,作为本发明实施例中信号转换装置另一个实施例,上述图5所示实施例所述的信号转换装置还包括:
第三连接模块701,用于与GPS天线连接;
所述获取模块502具体包括:
接收单元702,用于接收与所述第三连接模块701连接的GPS天线发送的射频GPS信号;
解调单元703,用于解调所述接收单元702接收的射频GPS信号,得到所述第一同步信号。
本发明实施例中,第三连接模块701与GPS天线连接,接收单元702接收射频GPS信号后,由解调单元703解调该射频GPS信号,得到第一同步信号,不需要RGPS模块也能处理得到第一同步信号,增强了信号转换装置对于各种实际应用场景的适应能力。
可选的,请参阅图8,作为本发明实施例中信号转换装置另一个实施例,上述图7所示实施例所述的信号转换装置还包括:
GPS天线801,用于接收射频GPS信号,并发送给所述接收单元601。
本发明实施例中,GPS天线801集成在该信号转换装置中,节省了安装部署空间,提高了信号转换装置对于各种不同环境的适应性。
上面各实施例中,对于存量和新建站点,不依赖RRU硬件更改,通过不同信号转换装置的解决方案,都可以实现RGPS信号通过CPRI透传到RRU,有利于全网同步的实施。
请参阅图9,作为本发明实施例中信号转换装置另一个实施例,该信号转换装置通过RRU上空闲的CPRI连接器与所述RRU连接,该信号转换装置900包括:
处理器901,存储器902,收发器903;
在本发明的一些实施例中,处理器901,存储器902,收发器903可通过
总线或其它方式连接,其中,图9中以通过总线连接为例;
通过调用所述存储器902存储的操作指令,所述处理器901用于执行如下步骤:
获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;
将所述第一同步信号转换为第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;
指示所述收发器903将所述第二同步信号通过所述CPRI连接器透传给所述RRU;
本发明的一些实施例中,所述信号转换装置与RGPS模块连接;
所述处理器901执行所述获取第一同步信号的步骤时,具体执行如下步骤:
指示所述收发器903接收所述RGPS模块发送的所述第一同步信号;
本发明的一些实施例中,所述信号转换装置与GPS天线连接;
所述处理器901执行所述获取第一同步信号的步骤时,具体执行如下步骤:
指示所述收发器903接收所述GPS天线发送的射频GPS信号;
解调所述射频GPS信号,得到所述第一同步信号;
本发明的一些实施例中,所述GPS天线集成在所述信号转换装置中。
本发明实施例还包括一种信号转换系统,其特征在于,包括:
RRU和图5至图9中任一个所示实施例所述的信号转换装置。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统,装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,
可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本发明各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现,也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(ROM,Read-Only Memory)、随机存取存储器(RAM,Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,以上实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述实施例对本发明进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。
Claims (13)
- 一种信号转换方法,其特征在于,信号转换装置通过射频拉远单元RRU上空闲的通用公共无线接口CPRI连接器与所述RRU连接,所述方法包括:所述信号转换装置获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;所述信号转换装置转换所述第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;所述信号转换装置将所述第二同步信号通过所述CPRI连接器透传给所述RRU。
- 根据权利要求1所述的方法,其特征在于,所述信号转换装置与远端的全球定位系统RGPS模块连接;所述信号转换装置获取第一同步信号具体包括:所述信号转换装置接收所述RGPS模块发送的所述第一同步信号。
- 根据权利要求1所述的方法,其特征在于,所述信号转换装置与全球定位系统GPS天线连接;所述信号转换装置获取第一同步信号具体包括:所述信号转换装置接收所述GPS天线发送的射频GPS信号;所述信号转换装置解调所述射频GPS信号,得到所述第一同步信号。
- 根据权利要求3所述的方法,其特征在于,所述GPS天线集成在所述信号转换装置中。
- 一种信号转换装置,其特征在于,包括:第一连接模块,用于通过RRU上空闲的CPRI连接器与所述RRU连接获取模块,用于获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;转换模块,用于转换所述获取模块获取的第一同步信号的帧格式,得到第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;透传模块,用于将所述转换模块转换得到的第二同步信号通过所述CPRI连接器透传给所述RRU。
- 根据权利要求5所述的装置,其特征在于,所述装置还包括:第二连接模块,用于与RGPS模块连接;所述获取模块具体用于,接收所述RGPS模块发送的所述第一同步信号。
- 根据权利要求5所述的装置,其特征在于,所述装置还包括:第三连接模块,用于与GPS天线连接;所述获取模块具体包括:接收单元,用于接收所述GPS天线发送的射频GPS信号;解调单元,用于解调所述射频GPS信号,得到所述第一同步信号。
- 根据权利要求7所述的装置,其特征在于,所述装置还包括:GPS天线,用于接收射频GPS信号,并发送给所述接收单元。
- 一种信号转换装置,其特征在于,信号转换装置通过RRU上空闲的CPRI连接器与所述RRU连接,所述装置包括:处理器,存储器,收发器;通过调用所述存储器存储的操作指令,所述处理器用于执行如下步骤:获取第一同步信号,所述第一同步信号为秒脉冲1PPS同步信号;将所述第一同步信号转换为第二同步信号,所述第二同步信号的帧格式为CPRI支持的帧格式;指示所述收发器将所述第二同步信号通过所述CPRI透传给所述RRU。
- 根据权利要求9所述的装置,其特征在于,所述信号转换装置与RGPS模块连接;所述处理器执行所述获取第一同步信号的步骤时,具体执行如下步骤:指示所述收发器接收所述RGPS模块发送的所述第一同步信号。
- 根据权利要求9所述的装置,其特征在于,所述信号转换装置与GPS天线连接;所述处理器执行所述获取第一同步信号的步骤时,具体执行如下步骤:指示所述收发器接收所述GPS天线发送的射频GPS信号;解调所述射频GPS信号,得到所述第一同步信号。
- 根据权利要求11所述的装置,其特征在于,所述GPS天线集成在所述信号转换装置中。
- 一种信号转换系统,其特征在于,包括:RRU和权利要求5至13中任一项所述的信号转换装置。
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| EP15895192.1A EP3285414A4 (en) | 2015-06-16 | 2015-06-16 | Signal conversion method, and signal conversion apparatus and system |
| CN201580034674.6A CN106471762B (zh) | 2015-06-16 | 2015-06-16 | 一种信号转换方法,信号转换装置以及系统 |
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| CN102742227A (zh) * | 2010-01-27 | 2012-10-17 | 三星电子株式会社 | 在数字单元与射频单元之间发送和接收以太网数据的方法及其装置 |
| EP2579678A1 (en) * | 2010-05-31 | 2013-04-10 | Huawei Technologies Co., Ltd. | Base station and method for synchronizing clock thereof |
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| US20130308626A1 (en) * | 2011-01-26 | 2013-11-21 | Huawei Technologies Co., Ltd. | Method and apparatus of implementing time synchronization |
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| DE102006019475B4 (de) * | 2006-04-26 | 2008-08-28 | Nokia Siemens Networks Gmbh & Co.Kg | Verfahren zur Synchronisation von Baugruppen einer Basisstation |
| KR20100117813A (ko) * | 2009-04-27 | 2010-11-04 | 주식회사 포스코아이씨티 | 광대역 무선 통신 시스템에서 cpri 송수신 장치 및 방법 |
| CN102118191B (zh) * | 2010-01-06 | 2014-01-08 | 华为技术有限公司 | 一种通用公共无线接口数据的传递方法、设备及系统 |
| KR20130085507A (ko) * | 2011-12-14 | 2013-07-30 | 삼성전자주식회사 | 무선 통신 시스템 및 무선 통신 시스템에서 시간 동기 방법 |
| CN103404226A (zh) * | 2013-06-07 | 2013-11-20 | 华为技术有限公司 | 一种传输数据的方法及设备 |
| CN104507154B (zh) * | 2014-11-20 | 2018-04-10 | 上海华为技术有限公司 | 数据传输方法、通信设备及通信系统 |
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| CN102742227A (zh) * | 2010-01-27 | 2012-10-17 | 三星电子株式会社 | 在数字单元与射频单元之间发送和接收以太网数据的方法及其装置 |
| EP2579678A1 (en) * | 2010-05-31 | 2013-04-10 | Huawei Technologies Co., Ltd. | Base station and method for synchronizing clock thereof |
| US20130308626A1 (en) * | 2011-01-26 | 2013-11-21 | Huawei Technologies Co., Ltd. | Method and apparatus of implementing time synchronization |
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| EP3285414A1 (en) | 2018-02-21 |
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