CN1661941A - Distributed base stations and data interactive method - Google Patents

Distributed base stations and data interactive method Download PDF

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CN1661941A
CN1661941A CN 200410004582 CN200410004582A CN1661941A CN 1661941 A CN1661941 A CN 1661941A CN 200410004582 CN200410004582 CN 200410004582 CN 200410004582 A CN200410004582 A CN 200410004582A CN 1661941 A CN1661941 A CN 1661941A
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base
multiplexing
wavelength
zoom
out
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CN 200410004582
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CN1330118C (en )
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靳玉志
蓝海青
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华为技术有限公司
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The base station system includes base band and more than one radio frequency zoom out units. Main multiplexing and demultiplexing module and standby multiplexing and demultiplexing module in use for wavelength division multiplexing of optical signal in multiple wavelength are setup at side of base band. Module of optical add and drop multiplexer is setup at each radio frequency zoom out unit. Through two optical fiber links in opposite directions, base band and radio frequency zoom out unit are connected as ring topology net of wavelength division multiplexing. The invention also discloses data interaction method based on distribution type base station system. Data are transmitted at both direction of wavelength division multiplexing ring westwards and eastwards. Thus, data transmission bandwidth of each radio frequency zoom out unit is raised. Features are: simplified structural design, raised reliability of network caused by natural repaired rearranging protection mechanism.

Description

分布式基站系统及数据交互方法 Distributed base station system and a data exchange method

技术领域 FIELD

本发明涉及无线通信系统中的基站组网技术,特别是指一种分布式基站组网系统及数据交互方法。 The present invention relates to base station networking technologies in the wireless communication system, and particularly to a distributed base station system and data networking interaction method.

背景技术 Background technique

随着第三代移动通信(3G)技术的发展,基站的设计方法趋向于基带(BB,BaseBand)与射频分离。 With the development of third generation mobile communication (3G) technology, the design method of a base station tends to baseband (BB, BaseBand) and the RF-disconnected. 射频拉远单元(RRU,Remote Radio Unit)就是这种设计思想下的典型应用,它可以很好地解决机房选址困难以及馈缆损耗等问题,提高天线口的发射功率。 Radio remote unit (RRU, Remote Radio Unit) is a typical application in this design, which can solve the room location and the feeder cable loss and other difficult issues, increase the transmission power of the antenna port. 但是它也带来一些新的有待解决的问题,其中最重要的问题之一就是BB与RRU之间传输组网问题。 But it has also brought new problems to be solved, one of the most important issues is the transmission network between BB and RRU problem.

BB与RRU之间的接口信号是IQ信号,速率比较高,一般采用光作为媒介直接传输,又由于IQ信号要求传输延时比较小,所以不宜采用同步数字系列(SDH)传输。 BB interface signal between the RRU and the signal IQ is, the rate is relatively high, generally use light as a medium for direct transmission, and because the IQ signal transmission delay requirement is relatively small, it should not synchronous digital hierarchy (SDH) transmission.

参见图1所示,为目前普遍采用的环形组网方案的分布式基站系统结构示意图,该组网形式的结构环上的每个节点都有两个方向的光口,BB上有主用光口和备用光口;各RRU上有东向光口和西向光口,东向光口直接或间接连接至BB主用光口,西向光口直接或间接连接至BB备用光口。 , The current loop is a schematic diagram of networking solutions commonly used distributed base station system configuration, each node on the ring structure of the network in the form of optical ports have two directions, the main light BB see FIG. 1 spare port and optical port; each RRU has an optical port to east and west optical port, an optical port east directly or indirectly connected to the main optical port BB, BB is connected to the west port to the standby light optical port directly or indirectly.

图1所示的基站系统正常工作时,在下行方向,BB将发往环上所有RRU电接口信号形式的下行接口数据利用帧结构复用并转换为某个波长的光信号,通过主用光口送到RRU0,RRU0通过东向光口接收BB发出的下行光信号,还原为电接口信号形式的接口数据,从中截取出本节点的下行接口数据进行处理,并将剩余数据转换为光信号后,通过西向光口转发至下一级的RRU,以后的RRU依次完成相同的功能,直到RRUn从东向光口收到本RRU的下行接口数据。 When the base station system shown in FIG. 1 is working properly, in the downlink direction, BB will be sent to all ring forms of the signal electrical interface downlink RRU interface data using a frame structure for a multiplexed optical signal and convert wavelengths, the main light after opening to RRU0, RRU0 received via the east port downstream optical signal light BB emitted in the form of an electrical signal to restore the interface to the data, taken out from the downlink node interface data is processed, and the remaining data is converted into an optical signal forwarded through the optical ports west RRU to the next stage, after the completion of the same functionality as RRU sequentially, until the present RRUn received downlink RRU interface data port to the light from the east.

上行方向,RRUn将上行接口数据转换为光信号后,通过东向光口发送上行接口数据,RRUn-1从西向光口接收RRUn发来的上行接口数据,在该上行接口数据中插入本节点的上行接口数据,通过东向光口发出,以后的RRU依次完成相同的功能,直到BB从东向光口收到环各RRU的上行接口数据。 After the upstream direction, RRUN uplink interface data into an optical signal, transmits the uplink by eastbound optical port interface data, RRUn-1 receives RRUN sent from an uplink interface data from the west to the optical port, the insertion node in the uplink interface data uplink interface data, sent through the light opening to the east, after completion of the same functionality as RRU sequentially until BB is received from the east to the optical ring interface data port upstream of each RRU.

当系统故障时,例如:RRUn-1与RRUn之间光纤故障,BB与RRU0,...,RRUm-1之间上下行接口数据的传送保持不变,仍然是每个RRU通过东向光口与BB主用光口收发上下行接口数据;但BB与RRUm,...,RRUn之间上下行接口数据的传送则与故障前相反,即每个RRU通过西向光口与BB备用光口收发上下行接口数据。 When the system failure, for example: fiber failure between RRUn-1 and RRUn, BB and RRU0, ..., uplink and downlink transmitting data between the interface RRUm-1 remains unchanged at each RRU east via optical port BB interface data with the uplink and downlink main optical transceiver port; BB but with RRUm, ..., uplink and downlink transmitting data between the interface and before the failure is RRUn contrast, i.e. each RRU via west optical and BB standby optical transceiver port the vertical data line interface.

由于现有的这种环形组网方案需要设计比较复杂的帧结构将各RRU的数据复用在一起,各RRU还需要完成数据帧一级的分插和复用功能,使每个RRU接口的功能设计非常复杂;另外,由于环上所有RRU的数据收发都共享同一波长的带宽进行传输,使各RRU的带宽需要受到限制,造成网络资源紧张,影响数据传输速度。 Because of this conventional approach requires a ring network design is relatively complicated frame structure together with the respective multiplexed data of the RRU, but also need to be completed for each RRU is a data frame and drop multiplexing function, each RRU interface functional design is very complex; in addition, since all the data transceiver RRU shared bandwidth on the ring are the same wavelength for transmission bandwidth required for each RRU is limited, causing strain on network resources, affecting the data transmission speed.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供一种分布式基站系统,解决现有技术中RRU接口功能过于复杂和数据传输带宽受限的问题。 In view of this, the main object of the present invention is to provide a distributed base station system, to solve the prior art RRU interface function is too complex and limited data bandwidth problems.

本发明的另一个目的是提供一种基于本发明分布式基站系统的数据交互方法,实现系统中各网络设备之间的正常数据交互。 Another object of the present invention is to provide a method for distributed data exchange system according to the present invention is based on a base station, to realize the normal system data exchange between the network devices.

根据第一个目的本发明公开的一种分布式基站系统,包括有基带和一个以上的射频拉远单元,基带和射频拉远单元通过两条方向相反的光纤链路连接成环形拓扑网,在基带侧设置有用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块,在每个射频拉远单元侧设置有包含东向光口和西向光口的光分插复用模块; According to a first object of the present invention, a distributed base station system is disclosed, comprising one or more baseband and radio remote unit, baseband and radio remote unit through two opposite directions of optical fiber links in a ring topology network, in side is provided with a main base with a multi-wavelength optical signal multiplexed by the wavelength division demultiplexing module and backup module for multiplexing and demultiplexing, there is provided an optical port comprising east and west optical port in each side of the radio remote unit optical add-drop multiplexing module;

基带将发送给每个射频拉远单元的下行电接口信号转换为不同波长的光信号后,分别送入主用复用解复用模块和备用复用解复用模块;主用复用解复用模块将不同波长的下行光信号合波后沿一条光纤链路逐级发送至每个射频拉远单元侧的光分插复用模块的东向光口,备用复用解复用模块将下行光信号合波后沿另一条光纤链路逐级发送至每个射频拉远单元侧的光分插复用模块的西向光口;每个光分插复用模块从东向光口和西向光口取出本地波长的光信号送入射频拉远单元,射频拉远单元将光信号转换为电接口信号;每个射频拉远单元将发送给基带的上行电接口信号转换为本地波长上行光信号后,送入本地光分插复用模块;光分插复用模块将本地波长上行光信号与从东向光口接收的其它波长光信号合波后通过自身西向光口沿一条光纤链路将上行光信号 The baseband signal is converted to a downstream electrical interfaces for each radio remote unit into optical signals of different wavelengths, respectively, into the main demultiplexed by multiplexing module and a standby module for multiplexing and demultiplexing; demultiplexing the multiplexed main the module for progressively transmitted to each remote radio unit optical drop multiplexing side to the east optical port module, the standby module for multiplexing and demultiplexing the downstream optical signals to downstream multiplexed at different wavelengths along an optical fiber link another optical fiber link signal to each of the light transmission progressively radio remote unit side of the rear edge drop multiplexer multiplexing module west optical port; each OADM module with the optical and light from east to west after each of the radio remote unit transmits to the uplink baseband conversion wavelength of the local electrical signals upstream optical signals; an optical signal wavelength into port Out of the local radio remote unit, the remote radio unit converts the optical signal into electrical signals , into the local optical add-drop multiplexing module; optical add-drop multiplexing module after local upstream optical signals with other wavelengths the wavelength multiplexing optical signal received from the east to the west through its optical ports to an uplink to the optical fiber link rim optical signal 送至基带的备用复用解复用模块,光分插复用模块将本地波长上行光信号与从西向光口接收的其它波长光信号合波后通过自身东向光口沿另一条光纤链路将上行光信号发送至基带的主用复用解复用模块;主用复用解复用模块和备用复用解复用模块分别将各自接收到的上行光信号解复用为不同波长光信号后送入基带,基带将光信号转换为电接口信号。 Alternate to the complex baseband demultiplexing module, OADM module with another optical fiber link to the local upstream optical signals with other wavelength of the optical wavelength multiplexing optical signal received from the west port to the rim by its own light east transmitting upstream optical signals to baseband master multiplexing demultiplexing module; master multiplexing demultiplexing modules and backup multiplexing and demultiplexing module for each upstream optical signal Solutions respective received multiplexed into different wavelengths of light signals after into baseband, the baseband converting electrical signals to optical signals.

该系统所述的主用和备用复用解复用模块为用于粗波分复用的复用解复用模块或用于密集波分复用的复用解复用模块。 The system according to the primary and backup multiplexing demultiplexing module for CWDM multiplexing or demultiplexing module for dense wavelength division multiplexing and demultiplexing module.

该系统所述复用解复用模块为用于粗波分复用的复用解复用器或用于密集波分复用的复用解复用器;所述光分插复用模块为光分插复用器。 The system of the multiplexing demultiplexing module for CWDM multiplexing demultiplexer for dense wavelength division multiplexing or multiplexing demultiplexer; said optical drop multiplexing module OADM.

该系统所述主用和备用复用解复用模块设置在基带内部或外部;所述光分插复用模块设置在射频拉远单元内部或外部。 The system multiplexing the primary and secondary base band disposed inside or outside the demultiplexing module; the optical add-drop multiplexing module radio remote unit disposed inside or outside.

该系统所述光纤链路上进一步包括至少一个光中继单元。 The system further comprises the at least one optical repeater unit on the optical fiber link.

根据所述另一目的本发明同时公开的一种分布式基站系统的数据交互方法,应用于由基带与射频拉远单元通过两条方向相反的光纤链路连接成的环形拓扑结构分布式基站系统中,在分布式基站组网系统的基带侧设置有用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块;在每个射频拉远单元侧设置有光分插复用模块;为每条光纤链路上的每个射频拉远单元分配一个用于承载数据的光波长;在基带向射频拉远单元发送数据的下行方向的数据传输过程包括:a)所述基带将所有发往射频拉远单元的下行电接口信号转换为相应分配波长的东向下行光信号和西向下行光信号分别送入主用复用解复用模块和备用复用解复用模块;b)主用复用解复用模块将所有东向下行光信号合波复用后通过一条光纤链路发送至环网上每个射频拉远单元侧光分插 The data exchange method in a distributed base station system further object of the present invention also disclosed, applied by the baseband and radio remote unit opposite to the optical fiber links to the ring topology distributed base station system via two directions , set the baseband side networking a distributed base station system with a main multi-wavelength optical signals are multiplexed by a WDM demultiplexing module and backup module for multiplexing and demultiplexing; disposed on each side of the radio remote unit optical drop multiplexing module; for each radio remote unit is assigned a wavelength of light used for carrying data on each optical fiber link; data transmission unit transmits the downlink data to the RRH baseband comprises: a) said baseband all sent to the radio remote unit downstream electrical signal conversion interface East respective assigned wavelength down the line optical signal and West to the downlink optical signal into each master multiplexing demultiplexing modules and backup demultiplexed multiplexing module; b) primary module for multiplexing and demultiplexing all down the line east optical signal combiner multiplexed and transmitted to the ring network each radio remote unit-side optical fiber link by a drop 复用模块的东向光口,备用复用解复用模块将所有西向下行光信号合波复用后通过另一条光纤链路发送至环网上每个射频拉远单元侧光分插复用模块的西向光口;c)每个射频拉远单元侧的光分插复用模块从东向光口和西向光口所接收的下行光信号中分别取出属于自身分配波长的下行光信号送入射频拉远单元;d)射频拉远单元从光分插复用模块送入的两路下行光信号中选择一路转换为电接口信号进行数据处理;在射频拉远单元向基带发送数据的上行方向的数据传输过程包括:a')每个射频拉远单元将需要发往基带的上行电接口信号转换为相应分配波长东向上行光信号和西向上行光信号分别送入本地的光分插复用模块;b')光分插复用模块将本地的西向上行光信号与从东向光口接收的本地以外的东向下行光信号合波复用后,从西向光口通过一条光纤链路向基 Multiplexing module eastbound optical port, backup module for multiplexing and demultiplexing light downward all westbound multiplexed transmission signal to the ring network each radio remote unit-side light multiplexed by the optical fiber link is another drop multiplexing module the west optical port; downstream optical signals c) each of the light radio remote unit side drop multiplexing module from the downstream optical signals East received by the optical interface and the west optical ports respectively belonging to its own assigned wavelengths into RF remote unit; D) radio remote unit from the two optical add-drop multiplexing module into downstream optical signals, select the way conversion data processing for the electrical signals; remote radio frequency units with sending data to the group in the uplink direction data transmission process comprising: a ') each of the radio remote unit will need to send upstream electrical signal to convert the baseband interface to the allocated wavelength corresponding eastbound optical signal and the upward optical signals West upwardly into the local line optical drop multiplexing module; b ') an optical drop multiplexing module local West up line optical signals with the host from outside the east receiving the optical port local row downward optical signal multiplexing the multiplexed, from the west by an optical fiber link to optical port to base 带侧的备用复用解复用模块发送,将本地的东向上行光信号与从西向光口接收的本地以外的西向下行光信号合波复用后,从东向光口通过另一条光纤链路向基带侧的主用复用解复用模块发送;c')基带侧的主用复用解复用模块和备用复用解复用模块分别从收到的东向上行光信号和西向上行光信号中解复用出每个射频拉远单元的上行光信号后送入基带;d')基带从主用复用解复用模块和备用复用解复用模块所送入的每个射频拉远单元的两路上行光信号中选择一路转换为电接口信号进行数据处理。 Alternate band side multiplexing and demultiplexing transmission module, the local eastbound upward optical signal from the West than west optical interface receiving local row downward optical signal multiplexing the multiplexed, from the east via another optical fiber strand to the optical port road to the main base band side multiplexing and demultiplexing transmission module; c ') primary complex baseband side demultiplexing modules and backup multiplexing demultiplexing module separately from the east received up line optical signals and West up row after the optical signal demultiplexed upstream optical signal of each radio remote unit into a baseband; d ') from the primary base band multiplexing and demultiplexing module for multiplexing and demultiplexing the standby module into each of the two rows optical signal path radio remote unit in the selected way data conversion processing to electrical signals.

该方法所述为每个射频拉远单元分配的光波长为国际电信联盟标准中规定的可用波长集中的波长。 This method is the wavelength of a predetermined set of available wavelengths for each ITU standard radio remote unit assigned light wavelength.

该方法对于同一射频拉远单元在两条光纤链路中为其所分配的用于承载数据的光波长相同。 The same method for remote radio units for the same optical wavelength carrying data at two of its assigned optical fiber link.

该方法所述复用解复用模块为用于粗波分复用的复用解复用模块或用于密集波分复用的复用解复用模块。 The method for the use of the demultiplexing means for multiplexing DWDM demultiplexing module CWDM multiplexing or demultiplexing module for re-use.

该方法步骤c)与d)之间进一步包括:射频拉远单元检测分插复用模块送入的两路下行光信号是否正常,将检测结果发送至基带;步骤d')具体包括:基带检测主用复用解复用模块和备用复用解复用模块送入的每个射频拉远单元的两路上行光信号是否正常,并接收射频拉远单元发来的检测结果,基带选择一组正常的上下行光信号,将其中的上行光信号转换为电接口信号后进行数据处理,并向该射频拉远单元发送指令消息,通知其接收所选择的下行光信号;并且所述步骤d)具体包括:射频拉远单元接收基带发送来的所述指令消息,选择消息中所指定的下行光信号转换为电接口信号后进行数据处理。 Between the method steps c) and d) further comprising: a radio remote unit detects a two-way downstream optical signals drop multiplexing module fed is normal, sends the detection results to the baseband; step d ') comprises: a base band detector main demultiplexing modules and backup multiplexing and demultiplexing the multiplexed with each remote radio two road trip module into an optical signal unit is normal, and radio remote unit receives the detection result sent from the baseband select a group normal uplink and downlink optical signals, which converts the upstream optical signals to electrical signals after data processing, to the radio remote unit sends an instruction message, which notifies the selected received downstream optical signal; and said step d) specifically includes: a remote radio unit receives the baseband transmitted command message, data processing after selecting the downstream optical signals converted message as specified in the electrical signals.

该方法步骤d')所述基带选择一组正常的上下行光信号具体包括:d'1)如果一个射频拉远单元的两路下行光信号都在正常,并且该射频拉远单元在基带侧的两路上行光信号也都正常,则基带从中选择一组上下行接口数据之间延时最小的上行和下行光信号;d'2)如果一个射频拉远单元的两路下行光信号和在基带侧的两路上行光信号中有一路或一路以上的光信号不正常,则基带在正常的光信号中优先选择一组上下行传输路径正好相反的上行和下行光信号。 The method step d ') the baseband selecting a set of normal uplink and downlink optical signal comprises: d'1) If a radio remote two downstream optical signals units are normal, and the radio remote unit in the baseband side the two lines on the road are also normal optical signal, the baseband line interface between a set of upper and lower data from which to choose the smallest latency upstream and downstream optical signals; d'2) If a two-way radio remote unit and the downstream optical signals in two rows optical baseband signal path side or all the way to more than one optical signal is not normal, the baseband signal in the normal optical preferentially select a group of uplink and downlink transmission paths of opposite upstream and downstream optical signals.

该方法预先根据上下行光信号传输路径正好相反,并从中优先选择上下行接口数据之间延时最小的原则设置一个不同检测结果情况下,基带应选择的上行光信号和射频拉远单元应选择的下行光信号的对应表,保存在基带中;则步骤d'1)所述基带从中选择一组上下行接口数据之间延时最小的上行和下行光信号过程具体包括:基带关断一路下行光信号,根据对应表选择此种情况下对应的一组上行和下行光信号,基带测量此种选择下,基带到射频拉远单元上行和下行光信号之间的接口数据延时值;基带恢复前一路下行光信号并关断另一路下行光信号,根据对应表选择此种情况下对应的一组上行和下行光信号,基带测量此种选择下,基带到射频拉远单元上行和下行光信号之间的接口数据延时值;基带比较两种选择下的测得的接口数据延时值,选择延时值较小 The method according to advance the opposite uplink and downlink optical transmission signal path, and from the principle of the minimum delay preference settings a different detection result, the upstream optical signals to be selected and the baseband radio remote unit interface data between the uplink and downlink should be selected the downstream optical signals correspondence table stored in baseband; then step d'1) between a set of upper and lower rows of the baseband interface data choose the smallest latency upstream and downstream optical signals process comprises: a base strip off all the way down an optical signal, the correspondence table select a set of uplink and downlink optical signals corresponding to this case in accordance with the baseband measured under such a choice, the baseband-to-radio interface data between the remote units upstream and downstream optical signals latency value; baseband recovery front and all the way down off the optical signal path further downstream optical signals, the correspondence table select a set of uplink and downlink optical signals corresponding to this case in accordance with the baseband measured under such a choice, baseband-to-radio remote unit upstream and downstream optical signals an interface between the data latency value; interface data delay values ​​measured at the two options baseband comparison, selects the smaller latency value 的一组上行和下行光信号;步骤d'2)所述基带在正常的光信号中选择一组上下行传输路径正好相反的上行和下行光信号过程具体包括:基带在对应表中查找并选择与当前情况匹配的一组上行和下行光信号。 A set of uplink and downlink optical signals; step d'2) of the baseband selecting a set of uplink and downlink transmission paths opposite upstream and downstream optical signals process comprises in a normal optical signal: a baseband in the correspondence table lookup and select a set of upstream and downstream optical signals to match the current situation.

该方法所述射频拉远单元通过网络物理层向基带发送检测结果;所述基带通过网络物理层向射频拉远单元发送指令消息。 The method of the radio remote unit transmits the detection result to the base band via a network physical layer; baseband to radio remote unit transmits command messages via the network physical layer.

从上面所述可以看出,本发明提供的一种分布式基站系统及其数据交互方法,利用波分复用技术,在基带侧设置用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块,在每个射频拉远单元侧设置有光分插复用模块,通过方向相反的两条光纤链路将BB和RRU连接成波分复用的环形组网结构,大大提高了各RRU的数据传输带宽的同时,使各系统中网络设备的结构设计得到简化,降低了网络设备的成本,又提高了数据传输速度。 As can be seen from the above, a distributed base station system and a data exchange method of the present invention provides, the use of wavelength division multiplexing technology, the baseband primary side for a multi-wavelength optical signal by wavelength division multiplexing demultiplexing module and a standby module for multiplexing and demultiplexing, is provided in each radio remote unit side of the optical drop multiplexing module, opposite to the direction of the two optical fiber link connected RRU and BB WDM ring network structure, greatly increases the data bandwidth of each RRU while the structural design of the systems in the network equipment is simplified, reducing the cost of network devices, but also improves the data transmission speed. 在数据交互过程中,利用环网技术的特点,在波分复用环的东向和西向光纤链路上同时进行数据传输,并通过采取新的自愈倒换保护机制,在保障系统设备之间正常的数据交互的同时,使得网络的可靠性得到进一步提高。 In the data exchange process, the use of the characteristics of ring network technology, data transmission over fiber optic link to the WDM ring while in the east and west, and by adopting a new self-healing protection switching mechanism between the security systems devices while normal data exchange, so that the reliability of the network is further improved.

附图说明 BRIEF DESCRIPTION

图1为现有分布式基站系统采用环形组网结构的示意图;图2为本发明实施例的分布式基站系统的结构示意图;图3为本发明实施例中RRU侧进行OADM的数据收发示意图;图4为本发明实施例出现第2种情况时光纤链路自愈倒换示意图;图5为本发明实施例出现第3种情况时光纤链路自愈倒换示意图;图6为本发明实施例出现第4种情况时光纤链路自愈倒换示意图;图7为本发明实施例出现第5种情况时光纤链路自愈倒换示意图;图8为本发明实施例出现第6种情况时光纤链路自愈倒换示意图;图9为本发明实施例出现第7种情况时光纤链路自愈倒换示意图。 1 is a schematic configuration of a conventional ring network using the distributed base station system; FIG. 2 a schematic view of the structure of a distributed base station system according to an embodiment of the present invention; FIG. 3 of the present invention, data OADM side schematic embodiment RRU embodiment transceiver; Fig 4 a schematic view of a fiber optic link switching healing cases the second case embodiment of the present invention; FIG. 5 schematic view of a fiber optic link switching healing cases case 3 embodiment of the present invention; FIG. 6 cases embodiment of the present invention when the fourth case the self-healing fiber optic link switching schematic; Fig. 7 a schematic view of a fiber optic link switching healing cases where fifth embodiment of the present invention; FIG. 8 cases where the sixth embodiment of the present invention, a fiber optic link switching schematic healing; FIG. 9 a schematic view of a fiber optic link switching healing cases where a seventh embodiment of the present invention.

具体实施方式 detailed description

下面结合附图及具体实施例对本发明再作进一步详细的说明。 Specific embodiments of the present disclosure will be described in further detail below in conjunction with the accompanying drawings and.

本发明方案采用环形组网结构,利用波分复用技术,在基带侧设置用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块,在每个射频拉远单元侧设置有光分插复用模块,通过方向相反的两条光纤链路将BB和RRU连接成波分复用环。 Multiplexing the primary embodiment of the present invention ring network structure, the use of wavelength division multiplexing technology, provided for the side of the base band multi-wavelength WDM optical signal is demultiplexed by a demultiplexing module and the multiplexing module standby, each a radio remote unit side optical drop multiplexing module, the direction opposite to the optical fiber link connecting two RRU and BB into WDM ring. 并通过合理布置BB与RRU间的数据传输路径,合理分配各RRU用于数据传输的波长。 And reasonable arrangement of a data transmission path between the RRU and BB, reasonable distribution of wavelengths for data transmission in each RRU. 解决数据传输带宽受限问题的同时,使系统中各网络设备的结构得以简化,并通过利用环网技术以及新的自愈倒换保护机制保障了网络的可靠性。 While addressing the problem of limited data transfer bandwidth of the system configuration of the network devices is simplified, and by using new technology and ring switching protection mechanisms to protect self-healing network reliability.

由于粗波分复用(CWDM,Coarse Wavelength Division Multiplexing)技术是近期应用比较广泛的一种光传输技术,它能够以较低成本提高光纤的利用率,因此本实施例中采用CWDM环网技术进行对RRU的组网。 Since the coarse wavelength division multiplexing (CWDM, Coarse Wavelength Division Multiplexing) technique is used widely in the near future an optical transmission technique, it is possible to improve the utilization rate of the optical fiber at a lower cost, so the present embodiment using ring technique CWDM networking for the RRU.

本实施例的分布式基站系统结构,参见图2所示。 Distributed base station system configuration of the present embodiment, referring to FIG. 2. 在BB侧,设置有两个用于实现各波长的光信号复用和解复用的复用/解复用器(MUX/DMUX),其中MUX/DMUX0为主用模块,MUX/DMUX1为备用模块。 In the BB side, is provided with two optical signals for each wavelength multiplexing and demultiplexing with multiplexing / demultiplexer (MUX / DMUX), wherein the MUX / DMUX0 module mainly used, MUX / DMUX1 to spare module . 在RRU侧,设置有光分插复用器(OADM)用于实现相关波长的光分插复用功能。 In RRU side, provided with an optical add-drop multiplexers (an OADM) for realizing the OADM function relevant wavelengths. 每个OADM上有两对光口,一对光口直接或间接连接至MUX/DMUX0,主要用于与MUX/DMUX0之间数据收发,另一对光口直接或间接连接至MUX/DMUX1,主要用于与MUX/DMUX1之间数据收发。 There are two optical ports each OADM, an optical port connected directly or indirectly to the MUX / DMUX0, and mainly used for data transmission and reception between the MUX / DMUX0, another optical port is connected directly or indirectly to the MUX / DMUX1, mainly and for data transmission and reception between the MUX / DMUX1. MUX/DMUX0、MUX/DMUX1与RRU侧OADM的两对光口之间通过图2中实线代表的顺时针和虚线代表的逆时针方向两条光纤链路连接起来。 MUX / DMUX0, between two optical interface MUX / DMUX1 OADM side and the RRU in the counterclockwise and clockwise two dashed lines represent the optical fiber link by a solid line in Figure 2 represents connected.

在本发明实施例中,规定BB到RRU的数据传送方向为下行方向;RRU到BB的数据传送方向为上行方向。 In an embodiment of the present invention, a predetermined data transfer direction BB of the RRU downstream direction; RRU BB to data transfer direction upstream direction. OADM与主用MUX/DMUX直接或间接相连的方向为东向;OADM与备用MUX/DMUX直接或间接相连的方向为西向。 OADM with the main east direction is connected to MUX / DMUX directly or indirectly; OADM direction and alternate MUX / DMUX is connected directly or indirectly to the west. OADM上直接或间接连接至MUX/DMUX0的一对光口为东向光口;直接或间接连接至MUX/DMUX1的一对光口为西向端口。 The OADM is directly or indirectly connected to the MUX / DMUX0 an optical port of optical interface to the east; directly or indirectly connected to MUX / DMUX1 to an optical port to the west port.

BB与分布式基站系统中RRU0,RRU1,……RRUn之间实现数据交互的电接口信号分别为IF0,IF1,……,IFn。 BB distributed base station system electrical signals for data interaction between RRU0, RRU1, ...... RRUn respectively IF0, IF1, ......, IFn. 其中,IF0用于RRU0,IF1用于RRU1,……依此类推IFn用于RRUn。 Which, IF0 for RRU0, IF1 for RRU1, ...... and so on IFn for RRUn. 当需要在CWDM环上进行数据传输时,首先在BB和RRU侧,将需要发送的BB与RRU之间的下行和上行电接口信号IF转换为相应波长的光信号;接收时,再将相应的光信号恢复出IF。 When the need for data transmission on the CWDM ring, BB and RRU in the first side and the downstream and upstream IF electrical signals need to be transmitted between the BB and the RRU into optical signals of respective wavelengths; is received, then the corresponding recovered optical signal IF.

因此,对于每个RRU,为其从国际电联(ITU-T)标准中规定的CWDM环网的可用波长集{λ0,λ1,……,λn}中分配两个波长,RRU使用其中的一个波长用于东向收和西向发承载在顺时针方向的光纤链路中的传输数据,另一个波长用于西向收和东向发承载在逆时针方向的光纤链路中的传输数据。 Thus, for each of the RRU, for a predetermined wavelength set available from the ITU (ITU-T) standard CWDM ring network {λ0, λ1, ......, λn} allocated two wavelengths, one of which used the RRU wavelengths for receiving and transmitting data to the east to the west in the clockwise direction is carried hair fiber link, the other wavelength used to transmit data sent to the west optical fiber link is carried in a counterclockwise direction to receive and East.

本实施例中每个RRU波长的具体分配情况,参见表1所示: DETAILED wavelength distribution of each RRU in the present embodiment, as shown in Table 1:

表1由于RRU的东向收西向发与RRU的西向收东向发通过不同的光纤链路进行传输,因此,可以为同一个RRU的东向收西向发和西向收东向发分配同一波长,即表1中对于任一个RRUx(x=0,1,……,n)可以令λx'=λx”。并使可用波长集与RRU东向收西向发波长集一一对应,同时可用波长集与RRU西向收东向发波长集一一对应。 Table 1 because the RRU east Accordingly, east receive west send and west receive east send assigned the same RRU same wavelength receive west hair and the RRU west to receive east sent is transmitted through a different fiber links, table 1 i.e. for any one RRUx (x = 0,1, ......, n) can make λx '= λx ". RRU and available wavelength set and sent to the east west wavelength set receiving one correspondence, and sets the available wavelength RRU and west to send correspondence to the wavelength set to close East.

对于数据的下行方向:在BB侧,根据表1中的波长分配原则,BB将下行至每个RRU的电接口信号IF同时转换为波长为λ'和λ”的两路下行光信号,分别送入MUX/DMUX0和MUX/DMUX1。 For the downlink direction of data: the two downstream optical signals in the BB side, in accordance with the principles of allocation of the wavelength in Table 1, the electrical signal to the downlink BB each RRU interface IF to simultaneously convert wavelengths of λ 'and λ "respectively send the MUX / DMUX0 and MUX / DMUX1.

以第x个RRU为例,a)BB将下行至RRUx(x=0,1,……,n)的电接口信号IFx同时转换为波长为λx'和λx”的两路下行光信号,分别送入MUX/DMUX0和MUX/DMUX1。 In an example the x-th RRU, a) BB down to the RRUx (x = 0,1, ......, n) of simultaneously switched electrical signals IFx two downstream optical signals to the wavelength λx 'and λx "respectively into the MUX / DMUX0 and MUX / DMUX1.

b)作为主用模块的MUX/DMUX0将所有的东向下行光信号λ0',λ1',……,λn'复合在一起送至CWDM环的顺时针方向光纤链路;作为备用模块的MUX/DMUX1将所有的西向下行光信号λ0”,λ1”,……,λn”复用在一起送至CWDM环的逆时针方向光纤链路。 b) as the primary module MUX / DMUX0 all down the line east optical signal λ0 ', λ1', ......, λn 'composited together in the clockwise direction to the fiber link CWDM ring; as a backup module MUX / DMUX1 down all westbound optical signal λ0 ", λ1", ......, λn "multiplexed together in the counterclockwise direction to the fiber link CWDM ring.

c)下行光信号到达RRUx侧时,参见图3所示,RRUx侧的OADMx从东向光口取出属于自身的下行光信号λx',从西向光口取出属于自身的下行光信号λx”,送入RRUx。 c) when the downstream optical signal reaches RRUx side, see FIG. 3, OADMx RRUx side removed from the east to the optical port downstream optical signal [lambda] x belonging to itself ', taken belonging to its own downstream optical signals λx "from the west to the optical port, send the RRUx.

d)RRUx从λx'和λx”中选择一路下行光信号进行光电转换,恢复出IFx电接口信号。 d) RRUx selected from λx 'and λx "all the way to the downstream optical signals photoelectrically converted electrical signals to recover IFx.

对于数据的上行方向:a')在RRUx侧,RRUx将发往BB的上行电接口信号IFx同时转换为波长为λx'和λx”的两路上行光信号送入OADMx。 For uplink data is: a ') at the side RRUx, RRUx upstream electrical signal will be sent to IFx BB interfaces to simultaneously convert the wavelength λx' and fed OADMx λx "two-way optical signal lines.

b')参见图3所示,OADMx将上行光信号λx”与从本地西向光口接收到的除下行λx”以外所有波长的光信号λ0”,λ1”,…,λx-1”,λx+1”,…,λn”复用后从东向光口送入CWDM环的逆时针方向光纤链路;同时,OADMx将上行光信号λx'与从东向光口接收到的除λx'以外所有波长的光信号λ0',λ1',…,λx-1',λx+1',…,λn'复用后从西向光口送入CWDM环的顺时针方向光纤链路。 Optical signal λ0 all wavelengths other than b ') Referring to Figure, OADMx upstream optical signal λx 3 "and the other downstream [lambda] x optical interface received from the local west to" ", λ1", ..., λx-1 ", λx + All except Meanwhile, OADMx the upstream optical signal λx 'received from the east side to the other optical port λx'; 1 ", ..., λn" hoop CWDM optical port into the multiplexed counterclockwise from the east fiber link optical signal wavelength λ0 ', λ1', ..., λx-1 ', λx + 1', ..., λn 'multiplexed into the fiber link CWDM ring clockwise from the west to the optical port.

c')上行光信号到达BB侧时,MUX/DMUX0将其从逆时针光纤链路中接收的上行光信号分解为波长分别为λ0”,λ1”,……,λn”的n+1路光信号送入BB;MUX/DMUX1将其从顺时针光纤链路中接收的上行光信号分解为波长分别为λ0',λ1',……,λn'的n+1路光信号送入BB。 When c ') reaches the upstream optical signal BB side, MUX / DMUX0 which the upstream optical signals received from optical link counterclockwise decomposition of wavelengths of λ0 ", λ1", ......, λn "n + 1 the path of the light signals into the BB; MUX / DMUX1 to decompose it receives upstream optical signals from the fiber link is clockwise wavelengths of λ0 ', λ1', ......, λn 'n + 1 of the optical signals into the BB.

d')BB从每对上行光信号λx”和λx'中选择一个进行光电转换,恢复出该信号所对应的RRUx的上行IFx电接口信号进行处理。 d ') BB upstream optical signals from each pair of λx "and λx' photoelectrically converting a selection, recovered uplink RRUx IFx electrical signals corresponding to the signal processing.

在上面所述本发明分布式基站组网系统在工作过程中,BB需要从每个RRUx的两路上行光信号λx'和λx”中选择一路光信号恢复为上行电接口信号IFx;每个RRUx需要从两路下行光信号λx'和λx”中选择一路光信号恢复为下行电接口信号IFx。 In the above networking a distributed base station system of the present invention during operation, BB need to select one optical signal to recover upstream electrical signal from each of the interface IFx RRUx rows of two way optical signals λx 'and λx "; each RRUx selecting one optical signal needs to recover a downlink electrical signal from the interface IFx two downstream optical signals λx 'and λx "in.

为了保证最佳的传输效果,本实施例要求BB、RRU在进行光信号选择时必须遵循如下两条约束条件:1、BB、RRUx(x=0,1,……,n)之间上行接口数据的传输延时与BB、RRUx之间下行接口数据的传输延时尽可能一致,表现为传输路径正好相反。 To ensure the best results in transmission, the present embodiment requires BB, the following two constraints must be followed when carrying out optical signal selection RRU: 1, BB, between upstream RRUx (x = 0,1, ......, n) Interface BB data and transmission delay, transmission delay as consistent as possible downlink data to the interface between RRUx, the performance of the transmission path opposite.

2、BB、RRUx(x=0,1,……,n)之间上行接口数据的传输延时与BB、RRU之间下行接口数据的传输延时尽可能的小。 2, BB, RRUx (x = 0,1, ......, n) of the uplink transmission delay between the BB interface data, interface data transmission delay between the downstream RRU as small as possible.

条件1的优先级高于条件2的优先级,即必须首先满足条件1,然后在满足条件1的基础上再满足条件2。 Condition 1 is higher than the priority of the priority condition 2, i.e., it must satisfy the condition 1, then a condition is satisfied based on the condition 2 again.

根据上述两个约束条件,本实施例制定的BB及RRU的光信号选择方案,参见表2所示。 The two above-described constraints, the optical signal and the RRU options BB formulation according to the present embodiment, as shown in Table 2.

表2并将表2所示的光信号选择方案保存在BB中,BB和RRU在进行光信号选择时,具体包括如下过程:在BB侧,BB检测上行光信号的λ0',λ1',……,λn'和λ0”,λ1”,……,λn”是否正常。 Table 2 and Table option optical signal shown in FIG. 2 is stored in the BB, BB and RRU optical signal during selection, the process includes the following: in the BB side, BB detected upstream optical signal λ0 ', λ1', ... ..., λn 'and λ0 ", λ1", ......, λn "is normal.

在RRU侧,每个RRUx检测下行光信号λx'和λx”是否正常,并将检测结果通过物理层或其它方式上报BB。 In RRU side, detecting the downstream optical signals each RRUx λx 'and λx "is normal, the detection result reported by the physical layer BB or otherwise.

BB所做的处理根据表2包括以下7种情况:1、如果BB检测到RRUx的上行光信号λx'和λx”均正常,并且RRUx检测下行光信号λx'和λx”也都正常,则BB和RRUx选择一组上下行接口数据之间的传输延时最小的传输路径,具体过程包括:a.BB关断下行λx”光信号,根据表2中第3种光信号选择原则,BB选择上行λx”光信号,RRUx选择下行λx'光信号,BB测量出从BB到RRUx之间上下行数据的传输时延,设此值为T0。 BB processing made according to Table 2 include the following seven cases: 1, if BB RRUx detected upstream optical signal λx 'and λx "were normal, and the detection RRUx downstream optical signals λx' and λx" also normal, the BB and RRUx selected transmission between a set of vertical line interface minimum delay in the data transmission path, the specific process comprising: a.BB off downstream λx "optical signals, selected in accordance with table 2 a third principle of the optical signal, BB selecting an uplink λx "optical signal, RRUx selects a downlink λx 'an optical signal, BB measured transmission delay between the uplink and downlink data from the BB to RRUx, provided this value T0.

b.BB恢复下行λx”光信号,然后BB关断下行λx'光信号,根据表2中第5种光信号选择原则,BB选择上行λx'光信号,RRUx选择下行λx”光信号,BB测量出从BB到RRUx的传输时延,设此值为T1,BB恢复下行λx'光信号。 Recovery b.BB downlink λx "optical signal, and then turned off BB downlink λx 'an optical signal, according to Table 2, the selection principle fifth optical signal, selecting an uplink BB λx' an optical signal, RRUx selects a downlink λx" optical signals, measuring BB BB from RRUx to the transmission delay, set this value Tl, restore BB downlink λx 'optical signal.

c.BB对T0和T1进行比较,当T0≤T1时,BB选择上行λx”光信号,并且BB通过物理层向RRUx发送指令消息通知RRUx选择下行λx'光信号;当T0>T1时,BB选择上行λx'光信号,并且BB通过物理层向RRUx发送指令消息通知RRUx选择下行λx”光信号。 c.BB compared to T0 and T1, when T0≤T1 time, selecting an uplink BB λx "optical signal, and sends an instruction message to inform the BB RRUx selected downlink λx 'RRUx optical signal to the physical layer; When T0> T1 when, BB selecting an uplink λx 'an optical signal, and sends an instruction message to inform the BB RRUx selects a downlink λx "RRUx optical signal to the physical layer.

2、参见图4所示,BB检测到上行光信号λx”正常,但上行光信号λx'故障,RRUx检测到下行光信号λx'正常,BB收到RRU上报的检测结果后,不管下行光信号λx”是否正常,通过查询表2,BB将选择上行光信号λx”,并向RRUx发送指令消息通知RRUx选择上行光信号λx'。 2, as shown in FIG. Referring, BB detected upstream optical signal λx 4 "normal, but upstream optical signal λx 'fault, RRUx detected downstream optical signals λx' normal, BB RRU receives the results, reported, regardless of the downstream optical signals λx "is normal, by a lookup table 2, BB upstream optical signal selection λx", and sends an instruction message notification RRUx RRUx selecting an uplink optical signal λx '.

3、参见图5所示,RRUx检测到下行光信号λx'正常,但下行光信号λx”故障,BB检测到上行光信号λx”正常,BB收到RRU上报的检测结果后,不管上行光信号λx'是否正常,通过查询表2,BB选择上行光信号λx”,并向RRUx发送指令消息通知RRUx选择上行光信号λx'。 3, refer to FIG. 5, RRUx detected downstream optical signals λx 'normal, but downstream optical signals λx "fault, BB detected upstream optical signal λx" normal, BB receive detection results reported by the RRU, whether the uplink optical signal λx 'is normal, by a lookup table 2, BB selecting an uplink optical signal λx ", and sends an instruction message notification RRUx RRUx selecting an uplink optical signal λx'.

4、参见图6所示,BB检测到上行光信号λx'正常,但上行光信号λx”故障,RRUx检测到下行光信号λx”正常,BB收到RRU上报的检测结果后,不管下行光信号λx'是否正常,通过查询表2,BB选择上行光信号λx',并向RRUx发送指令消息通知RRUx选择上行光信号λx”。 4, shown in see Fig. 6, BB detected upstream optical signal λx 'normal, but upstream optical signal λx "fault, RRUx detected downstream optical signals λx" normal, BB RRU receives the results, reported, regardless of the downstream optical signals λx 'is normal, by a lookup table 2, BB selecting an uplink optical signal λx', and sends an instruction message notification RRUx RRUx selecting an uplink optical signal [lambda] x. "

5、参见图7所示,RRUx检测到下行光信号λx”正常,但下行光信号λx'故障,BB检测到上行光信号λx'正常,BB收到RRU上报的检测结果后,通过查询表2,不管上行光信号λx”是否正常,BB选择上行光信号λx',并向RRUx发送指令消息通知RRUx选择上行光信号λx”。 After 5, see Figure, RRUx detected downstream optical signals λx 7 "normal, but downstream optical signals λx 'fault, BB detected upstream optical signal λx' normal, BB RRU receives the results, reported by the look-up table 2 , regardless of the upstream optical signal λx "is normal, BB selecting an uplink optical signal λx ', and sends an instruction message notification RRUx RRUx selecting an uplink optical signal [lambda] x."

6、参见图8所示,BB检测到上行光信号λx'正常,但上行光信号λx”故障,RRUx检测到下行光信号λx'正常但下行光信号λx”故障,,BB收到RRU上报的检测结果后,通过查询表2,BB选择上行光信号λx',并向RRUx发送指令消息通知RRUx选择上行光信号λx'。 6, referring to FIG. 8, BB detected upstream optical signal λx 'normal, but upstream optical signal λx "fault, RRUx detected downstream optical signals λx' but normally downstream optical signals λx" fault reported ,, BB received RRU after detection results, by a lookup table 2, BB selecting an uplink optical signal [lambda] x ', and notifies the upstream optical signal RRUx selection instruction message transmitted λx RRUx'.

7、参见图9所示,BB检测到上行光信号λx”正常,但上行光信号λx'故障,RRUx检测到下行光信号λx”正常,但下行光信号λx'故障,BB收到RRU上报的检测结果后,通过查询表2,BB选择上行光信号λx”,并向RRUx发送指令消息通知RRUx选择上行光信号λx”。 7, referring to FIG. 9, BB detected upstream optical signal λx "normal, but upstream optical signal λx 'fault, RRUx detected downstream optical signals λx" normal, but downstream optical signals λx' fault, BB reported received RRU after detection results, by a lookup table 2, BB selecting an uplink optical signal λx ", and sends an instruction notification message RRUx RRUx selecting an uplink optical signal [lambda] x."

另外,为了提高数据传输距离,可以在光纤链路上增加光功率放大器等光中继单元。 In order to improve the data transmission distance can be increased light such as optical power amplifier relay unit on the optical fiber link. 在分布式基站RRU站点比较多的情况下,可以在BB侧采用密集波分复用(DWDM)的MUX/DMUX,利用能够复用更多波长的DWDM技术替代上面实施例中的CWDM技术。 In more RRU distributed base station case, using dense wavelength division multiplexing (DWDM) to MUX / DMUX on BB side, using DWDM technology can be multiplexed more wavelengths CWDM technology alternative embodiment of the above embodiment. 本发明所述复用解复用模块可设置在基带内部或外部;所述光分插复用模块同样可设置在射频拉远单元内部或外部。 The present invention is a module for multiplexing and demultiplexing may be provided inside or outside the base band; the OADM module can likewise be provided with radio remote unit internally or externally.

以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 The preferred embodiment of the above embodiments of the present invention only but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, the, equivalent replacement, or improvement, it should be included in the present invention. within the scope of protection.

Claims (13)

  1. 1.一种分布式基站系统,包括有基带和一个以上的射频拉远单元,基带和射频拉远单元通过两条方向相反的光纤链路连接成环形拓扑网,其特征在于,在基带侧设置有用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块,在每个射频拉远单元侧设置有包含东向光口和西向光口的光分插复用模块;基带将发送给每个射频拉远单元的下行电接口信号转换为不同波长的光信号后,分别送入主用复用解复用模块和备用复用解复用模块;主用复用解复用模块将不同波长的下行光信号合波后沿一条光纤链路逐级发送至每个射频拉远单元侧的光分插复用模块的东向光口,备用复用解复用模块将下行光信号合波后沿另一条光纤链路逐级发送至每个射频拉远单元侧的光分插复用模块的西向光口;每个光分插复用模块从东向光口和西向光口取出本地 A distributed base station system, comprising more than one baseband and radio remote unit, baseband and radio remote unit connected to the optical fiber link opposite ring topology network through two directions, characterized in that provided on the base band side a main multi-wavelength optical signal demultiplexed by the wavelength division multiplexing module and a standby module for multiplexing and demultiplexing is provided contained in each radio remote unit side points to the east and west optical ports of optical interface light drop multiplexing module; optical signals of different wavelengths to transmit to the downlink baseband signal into the electrical interface for each remote radio unit is respectively fed to the primary module for multiplexing and demultiplexing the multiplexing and demultiplexing backup module; main demultiplexing the multiplexed transmitted to each module to stepwise light radio remote unit along the rear side of the multiplexed downstream optical signals of different wavelengths of an optical fiber link with the East drop multiplexing module to the optical port, backup demultiplexed after multiplexing the downstream optical signals multiplexed by each of the light module to stepwise transmit radio remote unit side drop multiplexing module along another optical fiber link to the west port; each optical add-drop multiplexing module from east Out of the local optical and west ports to light 长的光信号送入射频拉远单元,射频拉远单元将光信号转换为电接口信号;每个射频拉远单元将发送给基带的上行电接口信号转换为本地波长上行光信号后,送入本地光分插复用模块;光分插复用模块将本地波长上行光信号与从东向光口接收的其它波长光信号合波后通过自身西向光口沿一条光纤链路将上行光信号发送至基带的备用复用解复用模块,光分插复用模块将本地波长上行光信号与从西向光口接收的其它波长光信号合波后通过自身东向光口沿另一条光纤链路将上行光信号发送至基带的主用复用解复用模块;主用复用解复用模块和备用复用解复用模块分别将各自接收到的上行光信号解复用为不同波长光信号后送入基带,基带将光信号转换为电接口信号。 Long optical signal into the radio remote unit, the remote radio unit optical signals into electrical signals; each radio remote unit transmits to the uplink signal is converted into an electrical wavelength of the upstream optical signals to local base band interface, into local optical add-drop multiplexing module; optical add-drop multiplexing module after local upstream optical signals with other wavelengths the wavelength multiplexing optical signal received from the east via optical port itself transmits an optical signal to the optical west optical fiber link an uplink rim to spare a complex baseband by demultiplexing module, OADM module for local wavelength of the upstream optical signals from the other wavelengths of the optical signals multiplexed west optical port received through its eastbound optical rim of another optical fiber link after the master multiplexing demultiplexing modules and backup multiplexing and demultiplexing module for each upstream optical signal Solutions respective received multiplexed into different wavelength optical signal; uplink optical signal to the baseband primary multiplexing demultiplexing module into baseband, the baseband optical signals into electrical signals.
  2. 2.根据权利要求1所述的系统,其特征在于,所述的主用和备用复用解复用模块为用于粗波分复用的复用解复用模块或用于密集波分复用的复用解复用模块。 2. The system according to claim 1, wherein said primary and backup demultiplexing means for demultiplexing module using coarse wavelength division multiplexing or demultiplexing module for dense wavelength division multiplexing multiplexing with the demultiplexing module.
  3. 3.根据权利要求1所述的系统,其特征在于,所述复用解复用模块为用于粗波分复用的复用解复用器或用于密集波分复用的复用解复用器;所述光分插复用模块为光分插复用器。 3. The system of claim 1, wherein said multiplexing multiplexing demultiplexing module for using coarse wavelength division multiplexing demultiplexer for dense wavelength division multiplexing or multiplexing Solutions multiplexer; the optical drop multiplexing OADM module.
  4. 4.根据权利要求1所述的系统,其特征在于,所述主用和备用复用解复用模块设置在基带内部或外部;所述光分插复用模块设置在射频拉远单元内部或外部。 4. The system of claim 1, wherein the primary and backup module for multiplexing and demultiplexing is provided inside or outside the base band; the OADM disposed inside the radio remote unit with modules or external.
  5. 5.根据权利要求1所述的系统,其特征在于,所述光纤链路上进一步包括至少一个光中继单元。 5. The system according to claim 1, wherein said optical fiber link further comprises at least one optical repeater unit.
  6. 6.一种分布式基站系统的数据交互方法,应用于由基带与射频拉远单元通过两条方向相反的光纤链路连接成的环形拓扑结构分布式基站系统中,其特征在于,在分布式基站组网系统的基带侧设置有用于多波长光信号波分复用的主用复用解复用模块和备用复用解复用模块;在每个射频拉远单元侧设置有光分插复用模块;为每条光纤链路上的每个射频拉远单元分配一个用于承载数据的光波长;在基带向射频拉远单元发送数据的下行方向的数据传输过程包括:a)所述基带将所有发往射频拉远单元的下行电接口信号转换为相应分配波长的东向下行光信号和西向下行光信号分别送入主用复用解复用模块和备用复用解复用模块;b)主用复用解复用模块将所有东向下行光信号合波复用后通过一条光纤链路发送至环网上每个射频拉远单元侧光分插复用模块的东向光口 6. A data exchange method in a distributed base station system, which is applied by the baseband and radio remote unit through two opposite directions of optical fiber links to the ring topology of the distributed base station system, characterized in that, in a distributed base station side with a main network system is provided with a multi-wavelength optical signals are multiplexed by wavelength division multiplexing and demultiplexing module backup module for multiplexing and demultiplexing; optical drop multiplexer provided at each side of the radio remote unit a module; for each radio remote unit is assigned a wavelength of light used for carrying data on each optical fiber link; baseband to the radio frequency remote data transmission unit transmits the downlink data comprising: a) said base band all sent to the radio remote unit downstream electrical signals converted East respective assigned wavelength down the line optical signal and the West to downlink optical signals sent to the master multiplexing demultiplexing modules and backup multiplexing demultiplexing module; B ) primary module for multiplexing and demultiplexing all east down the line transmitted after multiplexed optical signal multiplexed by an optical fiber link to the ring network each radio remote unit side optical drop multiplexing module eastbound optical port 备用复用解复用模块将所有西向下行光信号合波复用后通过另一条光纤链路发送至环网上每个射频拉远单元侧光分插复用模块的西向光口;c)每个射频拉远单元侧的光分插复用模块从东向光口和西向光口所接收的下行光信号中分别取出属于自身分配波长的下行光信号送入射频拉远单元;d)射频拉远单元从光分插复用模块送入的两路下行光信号中选择一路转换为电接口信号进行数据处理;在射频拉远单元向基带发送数据的上行方向的数据传输过程包括:a')每个射频拉远单元将需要发往基带的上行电接口信号转换为相应分配波长东向上行光信号和西向上行光信号分别送入本地的光分插复用模块;b')光分插复用模块将本地的西向上行光信号与从东向光口接收的本地以外的东向下行光信号合波复用后,从西向光口通过一条光纤链路向基带侧的备用复用解复 Alternate multiplexing and demultiplexing module for all westbound multiplexed signal light downward toward the light transmitted to the west port of each ring network radio remote unit side optical drop multiplexing module after multiplexed by another optical fiber link; c) each radio remote unit side of the optical add-drop multiplexing module taken belong downstream optical signals assigned by wavelength into radio remote unit to the optical port and downstream optical signals west optical interface received from the East; D) RRH unit selected from the two downstream optical signals OADM into a module way conversion data processing for the electrical signals; the radio remote unit data transmission to the uplink baseband transmit data comprising: a ') each a radio remote unit will need to be sent to the uplink electrical signal into a baseband interface respective assigned wavelength eastbound upward optical signal and the West up line optical signals into the local optical add-drop multiplexing module; b ') OADM after module for local West up line optical signals with the host from outside the east receiving the optical port local row downward optical signal combiner multiplexed, from the west by an optical fiber link to the optical port to the standby complex baseband side demultiplexing 模块发送,将本地的东向上行光信号与从西向光口接收的本地以外的西向下行光信号合波复用后,从东向光口通过另一条光纤链路向基带侧的主用复用解复用模块发送;c')基带侧的主用复用解复用模块和备用复用解复用模块分别从收到的东向上行光信号和西向上行光信号中解复用出每个射频拉远单元的上行光信号后送入基带;d')基带从主用复用解复用模块和备用复用解复用模块所送入的每个射频拉远单元的两路上行光信号中选择一路转换为电接口信号进行数据处理。 Means for transmitting optical signals with the local eastbound upwardly from the West than west optical interface receiving local row downward optical signal multiplexed multiplexed, from the east via another optical fiber link master to the base band side by multiplexing the optical port demultiplexing transmission module; active complex c ') the base band side demultiplexing modules and backup multiplexing demultiplexing module from the east received underwent upward optical signal and the westbound direction demultiplexed optical signal with the per upstream optical signals after radio frequency remote unit into a baseband; d ') from the primary base band demultiplexing modules and backup multiplexing and demultiplexing the multiplexed lines two way radio remote unit each light module is fed converting the signal selected way to the data processing electrical signals.
  7. 7.根据权利要求6所述的方法,其特征在于,所述为每个射频拉远单元分配的光波长为国际电信联盟标准中规定的可用波长集中的波长。 7. The method according to claim 6, wherein said remote radio wavelengths for each set of available wavelengths of light wavelength allocation unit is predetermined in the ITU standard.
  8. 8.根据权利要求6所述的方法,其特征在于,对于同一射频拉远单元在两条光纤链路中为其所分配的用于承载数据的光波长相同。 8. The method according to claim 6, characterized in that, for the same radio remote unit the same optical wavelength carrying data for the two fiber link for its assigned.
  9. 9.根据权利要求6所述的方法,其特征在于,所述复用解复用模块为用于粗波分复用的复用解复用模块或用于密集波分复用的复用解复用模块。 9. The method according to claim 6, wherein said multiplexing multiplexing demultiplexing module for using coarse wavelength division multiplexing or demultiplexing module for DWDM demultiplexed multiplexing module.
  10. 10.根据权利要求6所述的方法,其特征在于,步骤c)与d)之间进一步包括:射频拉远单元检测分插复用模块送入的两路下行光信号是否正常,将检测结果发送至基带;步骤d')具体包括:基带检测主用复用解复用模块和备用复用解复用模块送入的每个射频拉远单元的两路上行光信号是否正常,并接收射频拉远单元发来的检测结果,基带选择一组正常的上下行光信号,将其中的上行光信号转换为电接口信号后进行数据处理,并向该射频拉远单元发送指令消息,通知其接收所选择的下行光信号;并且所述步骤d)具体包括:射频拉远单元接收基带发送来的所述指令消息,选择消息中所指定的下行光信号转换为电接口信号后进行数据处理。 10. The method according to claim 6, characterized in that, between steps c) and d) further comprising: detecting radio remote unit in two-way drop multiplexing downstream optical signals fed to the module is normal, the detection result sent to the baseband; step d ') comprises: a base band detector master multiplexing each remote radio two road trip optical signal demultiplexing modules and backup multiplexing and demultiplexing module for feeding unit is normal, and receive radio frequency remote unit sent to the detection result, the baseband select a set of normal uplink and downlink optical signal, wherein the upstream optical signal conversion for data processing as an electrical interface signals to the remote unit sends an instruction message to the radio, it receives the notification selected downstream optical signals; and said step d) comprises: receiving the radio remote unit in the transmitted baseband instruction message, data processing after selecting the downstream optical signals converted message as specified in the electrical signals.
  11. 11.根据权利要求10所述的方法,其特征在于,步骤d')所述基带选择一组正常的上下行光信号具体包括:d'1)如果一个射频拉远单元的两路下行光信号都在正常,并且该射频拉远单元在基带侧的两路上行光信号也都正常,则基带从中选择一组上下行接口数据之间延时最小的上行和下行光信号;d'2)如果一个射频拉远单元的两路下行光信号和在基带侧的两路上行光信号中有一路或一路以上的光信号不正常,则基带在正常的光信号中优先选择一组上下行传输路径正好相反的上行和下行光信号。 11. The method according to claim 10, wherein the step d ') selecting a set of baseband normal uplink and downlink optical signal comprises: d'1) If a two-way radio remote unit downstream optical signals are normal, and the radio remote unit in a two-way optical baseband signal line side is also normal, the baseband choose the smallest latency upstream and downstream optical signals between a set of upper and lower data line interface; d'2) If two downstream optical signal is a radio remote unit and all the way or more way an optical signal is not normal in both road trip optical baseband signal side, the baseband normal optical signal preferentially select a set of uplink and downlink transmission path just Instead of uplink and downlink optical signals.
  12. 12.根据权利要求11所述的方法,其特征在于,预先根据上下行光信号传输路径正好相反,并从中优先选择上下行接口数据之间延时最小的原则设置一个不同检测结果情况下,基带应选择的上行光信号和射频拉远单元应选择的下行光信号的对应表,保存在基带中;则步骤d'1)所述基带从中选择一组上下行接口数据之间延时最小的上行和下行光信号过程具体包括:基带关断一路下行光信号,根据对应表选择此种情况下对应的一组上行和下行光信号,基带测量此种选择下,基带到射频拉远单元上行和下行光信号之间的接口数据延时值;基带恢复前一路下行光信号并关断另一路下行光信号,根据对应表选择此种情况下对应的一组上行和下行光信号,基带测量此种选择下,基带到射频拉远单元上行和下行光信号之间的接口数据延时值;基带比较两种选择下的测 12. The method according to claim 11, wherein the uplink and downlink in advance according to the opposite optical signal transmission path, and minimum delay from the principle of preference settings where a detection result of the different interfaces between the uplink and downlink data, the baseband correspondence table to be selected upstream optical signals and downstream optical signals of radio remote unit to be selected, stored in baseband; then step d'1) of the baseband to choose a minimum delay between a set of upper and lower uplink data line interface and a downstream optical signal process comprises: a baseband to shut down one downstream optical signals, selecting a set of upstream and downstream optical signals corresponding to this case based on the correspondence table, the baseband measured under such a choice, baseband-to-radio remote unit uplink and downlink interface data latency value between the light signal; all the way down before the optical signal is turned off and recover the baseband channel further downstream optical signals, the correspondence table select a set of uplink and downlink optical signals corresponding to this case in accordance with the measurement of such selected group , the group delay in the data value to the interfaces between the radio remote unit upstream and downstream optical signals; measured in comparison with two choices yl 的接口数据延时值,选择延时值较小的一组上行和下行光信号;步骤d'2)所述基带在正常的光信号中选择一组上下行传输路径正好相反的上行和下行光信号过程具体包括:基带在对应表中查找并选择与当前情况匹配的一组上行和下行光信号。 The interface data latency value, select a smaller value of a set of uplink delay and a downlink optical signals; opposite upward step d'2) selecting a set of baseband uplink and downlink transmission path in a normal optical signal and downlink optical signal process comprises: a baseband find and select a set of upstream and downstream optical signals to the current case of a match in the correspondence table.
  13. 13.根据权利要求10所述的方法,其特征在于,所述射频拉远单元通过网络物理层向基带发送检测结果;所述基带通过网络物理层向射频拉远单元发送指令消息。 13. The method according to claim 10, wherein the radio remote unit transmits the detection result to the base band via a network physical layer; baseband to radio remote unit transmits command messages via the network physical layer.
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CN103428825A (en) * 2012-05-15 2013-12-04 中国普天信息产业股份有限公司 Radio remote unit selecting method
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CN101340647B (en) 2007-07-04 2012-02-29 中兴通讯股份有限公司 Wireless access system and carrier moving method based on centralized base station
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WO2009065268A1 (en) * 2007-11-21 2009-05-28 Zte Corporation Base band unit, radio frequency unit and distributed bs system based on srio protocol
CN101541107B (en) 2008-03-21 2010-09-01 大唐移动通信设备有限公司 Base station system and data transmission method
CN101771591B (en) 2008-12-26 2011-09-28 大唐移动通信设备有限公司 Service transmission method and system under RRU and BBU loop network
CN101925076B (en) 2009-06-09 2012-12-12 上海贝尔股份有限公司 Radio frequency remote equipment and distributed base station
CN101868054B (en) 2010-05-07 2012-10-31 武汉邮电科学研究院 Improved distribution-type base station architecture and realization method
CN101868054A (en) * 2010-05-07 2010-10-20 武汉邮电科学研究院 Improved distribution-type base station architecture and realization method
CN102611492A (en) * 2011-01-21 2012-07-25 中兴通讯股份有限公司 BBU (base band unit), RRU (remote radio unit) and RRU networking method and networking system
CN105515710A (en) * 2011-01-26 2016-04-20 华为技术有限公司 Method and device for realizing time synchronization
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CN103428825A (en) * 2012-05-15 2013-12-04 中国普天信息产业股份有限公司 Radio remote unit selecting method

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