WO2018119596A1 - 分布式基站中的信号处理方法和分布式控制装置 - Google Patents

分布式基站中的信号处理方法和分布式控制装置 Download PDF

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Publication number
WO2018119596A1
WO2018119596A1 PCT/CN2016/112168 CN2016112168W WO2018119596A1 WO 2018119596 A1 WO2018119596 A1 WO 2018119596A1 CN 2016112168 W CN2016112168 W CN 2016112168W WO 2018119596 A1 WO2018119596 A1 WO 2018119596A1
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Prior art keywords
signal
cpri
downlink
uplink
carrier signal
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PCT/CN2016/112168
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English (en)
French (fr)
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付维翔
赵兴
张丹
杨斌
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华为技术有限公司
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Priority to CN201680085265.3A priority Critical patent/CN109076636A/zh
Priority to PCT/CN2016/112168 priority patent/WO2018119596A1/zh
Publication of WO2018119596A1 publication Critical patent/WO2018119596A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • 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

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  • the present application relates to the field of wireless communications, and in particular, to a signal processing method and a distributed control device in a distributed base station.
  • the indoor distribution system includes a signal source and a signal distribution system.
  • the signal source provides a wireless signal for the signal distribution system.
  • the signal source can be a base station, a direct-drop base station, or other device in a wireless communication system.
  • the signal provided by the signal source may include any of the following signals: a signal provided by a Personal Handy-phone System (PHS) signal source, a 3G signal, a Wireless Local Area Networks (WLAN) signal, Global System for Mobile Communication (GSM) signal or Code Division Multiple Access (CDMA) signal.
  • PHS Personal Handy-phone System
  • 3G Wireless Local Area Networks
  • WLAN Wireless Local Area Networks
  • GSM Global System for Mobile Communication
  • CDMA Code Division Multiple Access
  • One type of signal source is a BBU+RRU distributed base station, where the BBU is an abbreviation of a building base band unit, and the RRU is a remote radio unit.
  • the BBU+RRU distributed base station is compared with the traditional centralized base station, which physically separates the baseband part and the radio frequency part of the traditional base station, and passes through a standard baseband radio frequency interface, such as a common public radio interface (Common Public). Radio Interface, CPRI), to connect.
  • a standard baseband radio frequency interface such as a common public radio interface (Common Public). Radio Interface, CPRI)
  • a distributed control unit (DCU) and other units may be added between the BBU and the RRU to implement communication between the BBU and the RRU.
  • the DCU can support third-party radio frequency (RF) feed signals.
  • RF radio frequency
  • the DCU can only support the RF feed signal of the GSM system, so that the distributed base station of the BBU+DCU+RRU mode can only support the single-system RF feed.
  • the present application provides a signal processing method and a distributed control device in a distributed base station, so that the distributed control device can multiplex a CPRI mapping channel in a distributed control device for processing BBU-related carrier preferences to process RF-related
  • the signal supports the multi-standard RF feed and improves the resource utilization of the distributed control device.
  • the present application provides a signal processing method in a distributed base station, where the signal The processing method includes: receiving a first downlink signal fed by a radio frequency RF source; acquiring a first downlink subband signal in the first downlink signal; and performing downconversion processing on the first downlink subband signal Obtaining a first downlink frequency conversion signal according to the network standard corresponding to the first down conversion signal, acquiring a first downlink carrier signal of the first downlink frequency conversion signal having a bandwidth corresponding to the network standard; multiplexing The first common public radio interface CPRI mapping channel corresponding to the network standard performs CPRI mapping on the first downlink carrier signal to obtain a first CPRI mapping frame, where the first CPRI mapping channel is used for the distributed control The device performs CPRI mapping on the carrier signal of the network system received by the indoor baseband processing unit BBU; and transmits the first downlink carrier signal by using the first CPRI mapping frame.
  • the distributed control device receives the downlink signal fed by the RF source and performs down-conversion, and then splits the signal obtained by down-conversion to obtain a carrier signal of the corresponding network standard, and then Reusing a CPRI for CPRI frame mapping of a carrier transmitted by a BBU to perform CPRI frame mapping on a carrier signal according to a signal fed by an RF source, so that the distributed control device can fully utilize the present in the distributed control device
  • the signal processing method further includes: receiving a first uplink signal that is sent by using a second CPRI frame, where the first uplink signal includes a first uplink carrier signal of the network standard; multiplexing Obtaining, by the second CPRI mapping channel corresponding to the network standard, the first uplink carrier signal in the second CPRI frame, where the second CPRI mapping channel is used to obtain the foregoing sent in the CPRI frame to the BBU a carrier signal of the network system; synthesizing a first uplink subband signal including the first uplink carrier signal; performing upconversion on the first uplink subband signal to obtain a first uplink frequency conversion signal; and transmitting the signal to the RF source And including a first uplink signal of the first uplink frequency conversion signal.
  • the signal processing method further includes: receiving a second downlink carrier signal of the network standard sent by the BBU; using the first CPRI mapping channel, using the second downlink carrier The signal is CPRI mapped to obtain a third CPRI frame; the second downlink carrier signal is transmitted through the third CPRI frame.
  • the signal processing method further includes: receiving a second uplink carrier signal that is sent by using a fourth CPRI frame, and acquiring, by using the second CPRI mapping channel, the foregoing in the fourth CPRI frame. a second uplink carrier signal; sending the second uplink to the BBU Wave signal.
  • the present application provides a distributed control device in a distributed base station, the distributed control device comprising various units for performing the signal processing method in the first aspect or any of the possible implementations.
  • the present application provides a distributed control device in a distributed base station, the distributed control device including a memory, a processor, and a communication interface.
  • the memory is used to store programs
  • the processor is used to execute programs stored in the memory
  • the communication interface is used for communication.
  • the processor executes a program in the memory
  • the processor is specifically configured to invoke the communication interface to implement the signal processing method in the first aspect or any possible implementation.
  • the application provides a distributed base station, comprising the distributed control device in the second aspect or the third aspect.
  • FIG. 1 is a schematic diagram of an application scenario of a signal processing method applied to an embodiment of the present application.
  • FIG. 2 is a schematic flowchart of a signal processing method according to an embodiment of the present application.
  • FIG. 3 is a schematic block diagram of a distributed control apparatus according to an embodiment of the present application.
  • an exemplary architectural diagram of a distributed base station capable of implementing the signal processing method of the embodiment of the present application is first described as a whole. It should be understood that the embodiment of the present application is not limited to the system architecture shown in FIG. 1 , and the signal processing method and the distributed control device applicable to the embodiment of the present application may further include other devices or units.
  • the device may be hardware, functionally divided software, or a combination of the two.
  • the BBU 110 is a baseband processing unit that centrally controls and manages the entire base station system and implements baseband signal processing.
  • the DCU 120 supports RF source feed and can also receive signals transmitted by the BBU 110.
  • a Base Transceiver Station (BTS) 130 can feed signals to the DCU 120RF.
  • BTS Base Transceiver Station
  • the pRRU 150 is an indoor low-power radio remote unit that is responsible for transmitting and processing radio signals between the BBU 110 or the BTS 130 and the antenna system.
  • the DCU 120 can only support single-mode BTS 130RF feeds, such as the GSM standard.
  • the present application proposes a signal processing method and a distributed control device that enable The distributed control device is capable of supporting more standard RF feed sources.
  • FIG. 2 is a schematic flowchart of a signal processing method according to an embodiment of the present application. It should be understood that FIG. 2 illustrates the steps or operations of the signal processing method, but these steps or operations are merely examples, and other embodiments of the present application may also perform other operations or variations of the operations in FIG. 2. Moreover, the various steps in FIG. 2 may be performed in a different order than that presented in FIG. 2, and it is possible that not all operations in FIG. 2 are to be performed.
  • the signal processing method illustrated in FIG. 2 may be performed by a distributed control device in a distributed base station, which may be the DCU 120 shown in FIG. 1.
  • S210 Receive a first downlink signal that is fed by an RF source.
  • the RF source may be the BTS 130 shown in FIG. 1
  • the first downlink signal may include a Long Term Evolution (LTE) system network standard and/or a Universal Mobile Telecommunications System (Universal Mobile Telecommunications System, UMTS) Carrier signal for network standards, or other network standards.
  • LTE Long Term Evolution
  • UMTS Universal Mobile Telecommunications System
  • one or more frequency conversion modules may be included in the distributed control device.
  • Each inverter module can only upconvert or downconvert signals within a certain bandwidth. Therefore, if the bandwidth of the first downlink signal received by the distributed control device exceeds the maximum value of the signal bandwidth that each frequency conversion module can process, the frequency conversion unit of the distributed control device needs to divide the first downlink signal into multiple The sub-band signals acquire all the sub-band signals in the first downlink signal. The bandwidth of each subband signal is less than or equal to the upper limit of the signal bandwidth that each of the inverter modules can handle.
  • the distributed control device can convert up to 30 sub-band signals, including up-conversion and down-conversion, and the upper limit of the bandwidth of each sub-band signal is 20M.
  • the bandwidth of the first downlink signal is 30 M
  • the first downlink signal may be divided into two sub-band signals, wherein one sub-band signal may have a bandwidth of 20 M, and another sub-band signal may have a bandwidth of 10 M.
  • the frequency conversion unit can separately perform frequency conversion processing on the two sub-band signals.
  • the distributed control device divides the downlink signal into one subband signal.
  • the distributed control device After the first downlink signal is divided into one or more downlink subband signals, the distributed control device performs down-conversion processing on each of the one or more downlink sub-band signals to obtain each downlink.
  • the sub-band signals respectively correspond to the down-converted signals.
  • the distributed control device After obtaining the downlink variable frequency signal, the distributed control device divides the downlink variable frequency signal into one or more downlink carrier signals according to the pre-configured network standard information on the distributed control device.
  • the bandwidth of the obtained downlink carrier signal is the signal bandwidth of the corresponding network standard.
  • the configuration information in the distributed control device may record the port of the distributed control device, the network standard of the signal that the distributed control device can process, the bandwidth of the network system, and the center frequency of the signal of the standard system.
  • the pre-configured network standard information on the distributed control device may include a correspondence between the type of the network standard and the carrier bandwidth of the network standard.
  • the mapping between the port of the downlink signal received by the RF, the center frequency of the downlink signal, and the network standard information corresponding to the downlink signal may be included in the distributed control device.
  • a sub-information in the configuration information may be: 1/2.0G/5M/UMTS, which means that the signal received by port 1 of the distributed control device may include a midpoint frequency of 2.0G, a bandwidth of 5M, and a standard format. Signal for UMTS.
  • the distributed control device down-converts the down-converted signal
  • the configuration information corresponding to the down-converted signal can be determined according to the configuration information, so that the network format, carrier bandwidth, and the like corresponding to the down-converted signal can be known.
  • the distributed control device can then divide the downconverted signal into one or more downlink carrier signals having a bandwidth equal to the carrier bandwidth of the network system.
  • This step can be specifically implemented by a splitter.
  • the distributed control device After obtaining the downlink carrier signals, the distributed control device performs CPRI mapping on the downlink carrier signals. Specifically, the CPRI mapping channel corresponding to the network standard corresponding to the carrier signal is used to map the downlink carrier signals into the CPRI frame according to a format of a certain CPRI frame structure.
  • the CPRI frame structure is referred to as a first CPRI frame structure
  • the CPRI frame is referred to as a first CPRI frame.
  • the CPRI mapping channel corresponding to the network system corresponding to the carrier signal may be a unit for performing CPRI mapping on the carrier signal of the network standard received by the distributed control device from the BBU in the distributed control device, that is, the distributed control device.
  • the distributed control device After the distributed control device maps the downlink carrier signal to the first CPRI frame, the distributed control device transmits the CPRI frame, that is, transmits the downlink carrier signal.
  • the distributed control device receives the downlink signal fed by the RF source and performs down-conversion, and then splits the signal obtained by down-conversion to obtain a carrier signal of the corresponding network standard, and then Reusing a CPRI for CPRI frame mapping of a carrier transmitted by a BBU to perform CPRI frame mapping on a carrier signal according to a signal fed by an RF source, so that the distributed control device can fully utilize the present in the distributed control device
  • the DCU Before performing the signal processing method of the embodiment of the present application, the DCU can configure the frequency, bandwidth, and system information of each sub-band through Man-Machine Language (MML).
  • MML Man-Machine Language
  • the DCU configuration may include the GSM system, the LTE system, and the Universal Mobile Telecommunications System (UMTS) system.
  • UMTS Universal Mobile Telecommunications System
  • the DCU After the DCU configures the frequency, bandwidth, and format of each subband, it can notify the pRRU of these configuration information.
  • the pRRU configures the IF processing channel according to the frequency, bandwidth and standard information of the DCU configuration, and can reuse the existing IF processing channel.
  • the signal processing method may further include: receiving a first uplink signal that is sent by using the second CPRI frame, where the first uplink signal includes a first uplink carrier signal of the network standard; Obtaining, by using a second CPRI mapping channel corresponding to the network standard, the first uplink carrier signal in the second CPRI frame, where the second CPRI mapping channel is used to obtain a location sent to the BBU in a CPRI frame. a carrier signal of the network standard; synthesizing a first uplink subband signal including the first uplink carrier signal; performing upconversion on the first uplink subband signal to obtain a first uplink frequency conversion signal; and to the RF source Transmitting a first uplink signal including the first uplink frequency conversion signal. .
  • the first uplink carrier signal may be combined into a first uplink sub-band signal by the combiner.
  • the distributed control apparatus may receive a CPRI frame that satisfies a certain CPRI frame structure format (such as a first CPRI frame structure) (referred to as a second CPRI frame for convenience of subsequent description), in the second CPRI frame.
  • the first uplink signal carried may include one or more carrier signals (for For subsequent convenience, the carrier signal is referred to as a first uplink carrier signal).
  • the distributed control device acquires or analyzes each first uplink carrier signal from the second CPRI frame, and combines the first uplink carrier signals into one according to pre-configured network standard information on the distributed control device.
  • Subband signal this subband signal can be referred to as a first uplink subband signal).
  • the distributed control device may perform up-conversion processing on the first uplink sub-band signal to obtain a corresponding first uplink-converted signal. Finally, the distributed control device can transmit the first up-converted signal to the RF source at a first port connected to the RF source.
  • the signal processing method in the embodiment of the present application can enable the distributed control device to forward the uplink signal of any standard to the RF source.
  • the distributed control device may also receive the downlink signal sent by the BBU, and then forward the downlink signal.
  • the signal processing method may further include: receiving a second downlink carrier signal of the network standard that is sent by the BBU, and performing CPRI mapping on the second downlink carrier signal by using the first CPRI mapping channel, Obtaining a third CPRI frame; transmitting the second downlink carrier signal by using the third CPRI frame.
  • the distributed control device can directly perform the CPRI frame mapping on the second downlink signal in the same manner as the downlink signal sent by the BBU in the existing DCU, so as to satisfy the corresponding A CPRI frame of a CPRI frame structure (this CPRI frame can be referred to as a third CPRI frame).
  • the third CPRI frame is the same CPRI frame as the first CPRI frame.
  • the distributed control device performs carrier-level CPRI mapping from the RF source and the signals of the same standard, frequency, and bandwidth received from the BBU, the same CPRI channel can be multiplexed.
  • the signal processing method further includes: receiving a second uplink carrier signal that is sent by using the fourth CPRI frame; and acquiring, by using the second CPRI mapping channel, the location in the fourth CPRI frame. Determining a second uplink carrier signal; transmitting the second uplink carrier signal to the BBU.
  • the distributed control device receives the fourth CPRI frame that satisfies the corresponding CPRI frame structure format, and the second uplink signal carried in the fourth CPRI frame may include one or more carrier signals (for subsequent convenience, the carrier The signal is referred to as a second uplink carrier signal).
  • the distributed control device acquires or analyzes each second uplink carrier signal from the fourth CPRI frame, and may combine the second uplink carrier signals into one subband signal (this subband signal may be referred to as The second uplink subband signal).
  • the distributed control device can transmit the second uplink subband signal to the BBU at the second port connected to the BBU.
  • the distributed control device may perform other processing on the signal received from the RF source.
  • the downlink signal may be divided into multiple sub-band signals, and then each sub-band signal is down-converted separately, and then the variable-frequency signal obtained by the down-conversion process is directly performed.
  • the CPRI maps to obtain the corresponding CPRI frame, and finally sends the signal through the corresponding CPRI frame.
  • the distributed control device may further perform up-conversion processing on the received uplink sub-band signal, and send the sub-band variable-frequency signal obtained by the up-conversion processing to the RF source.
  • the distributed control device splits the signal fed by the RF source to obtain a carrier signal, and then performs CRPI mapping on the carrier signal, and then transmits the carrier signal and distribution through the CRPI frame obtained by the CRPI mapping.
  • the control device can at least save twice the transmission bandwidth, and the transmission power can be at least doubled.
  • FIG. 3 is a schematic frame diagram of a distributed control apparatus according to an embodiment of the present application. It should be understood that the apparatus shown in FIG. 3 is only an example, and the distributed control apparatus of the embodiment of the present application may further include other modules or units, or include modules similar to those of the respective modules in FIG. 3, or not including the figure. All modules in 3.
  • the communication unit 310 is configured to receive a first downlink signal that is fed by the radio frequency RF source.
  • the frequency conversion unit 320 is configured to acquire a first downlink subband signal in the first downlink signal.
  • the frequency conversion unit 320 is further configured to perform a down conversion process on the first downlink subband signal to obtain a first downlink frequency conversion signal;
  • the carrier processing unit 330 is configured to acquire, according to a network standard corresponding to the first down-converted signal, a first downlink carrier signal that has a bandwidth corresponding to the network standard in the first downlink variable-conversion signal;
  • the carrier processing unit 330 is further configured to perform CPRI mapping on the first downlink carrier signal by using a first common public radio interface CPRI mapping channel corresponding to the network standard, to obtain a first CPRI mapping frame, where the first The CPRI mapping channel is configured to perform CPRI mapping on the carrier signal of the network system received by the distributed control device from the indoor baseband processing unit BBU;
  • the communication unit 310 is further configured to send the first downlink carrier signal by using the first CPRI mapping frame.
  • the distributed control device receives the downlink signal fed by the RF source and performs down-conversion, and then splits the signal obtained by the down-conversion to obtain a carrier signal of the corresponding network standard, and then sends and removes the signal through the CPRI frame.
  • the obtained carrier signal is divided, so that the distributed control device can process and forward the signals of different standards fed by the RF source.
  • the communication unit is further configured to receive a first uplink signal that is sent by using a second CPRI frame, where the first uplink signal includes a first uplink carrier signal of the network standard
  • the carrier processing unit is further configured to: multiplex the second CPRI mapping channel corresponding to the network standard, and acquire the first uplink carrier signal in the second CPRI frame, where the second CPRI mapping channel is used to obtain a CPRI frame.
  • the carrier processing unit is further configured to synthesize a first uplink subband signal including the first uplink carrier signal;
  • the frequency conversion unit is further configured to use the An uplink sub-band signal is up-converted to obtain a first uplink-converted signal;
  • the communication unit is further configured to send, to the RF source, a first uplink signal that includes the first uplink-converted signal.
  • the communication unit is further configured to receive a second downlink carrier signal of the network standard that is sent by the BBU, where the carrier processing module is further configured to use the first CPRI mapping channel. Performing a CPRI mapping on the second downlink carrier signal to obtain a third CPRI frame, where the communication connection unit is further configured to send the second downlink carrier signal by using the third CPRI frame.
  • the communication unit is further configured to receive a second uplink carrier signal that is sent by using the fourth CPRI frame, where the carrier processing unit is further configured to obtain the location by using the second CPRI mapping channel.
  • the second uplink carrier signal in the fourth CPRI frame; the communication interface is further configured to send the second uplink carrier signal to the BBU.
  • a distributed control device of another embodiment of the present application includes a communication interface, a memory, and a processor.
  • the memory is used to store programs
  • the processor is used to execute programs in the memory
  • the communication interface is used to communicate with other devices or units.
  • the communication interface in the distributed control apparatus of the embodiment of the present application is used to execute FIG. 3
  • the operation performed by the communication unit in the processor for performing the operations performed by the frequency conversion unit and the carrier processing unit in FIG. For the sake of introduction, it will not be repeated here.
  • the embodiment of the present application further provides a distributed base station, which includes the distributed control device shown in FIG. 3, which is not described herein for brevity.
  • the disclosed systems, devices, and methods 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, and may be in an 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 application 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 functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product.
  • the technical solution of the present application which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including Several instructions are used to make a computer device (which can be a personal computer, a server, Either a network device or the like) performs all or part of the steps of the method described in the various embodiments of the present application.
  • 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

本申请提供了分布式基站中的信号处理方法和分布式控制装置。本申请的信号处理方法包括：接收RF信源馈入的第一下行信号；获取第一下行信号中的第一下行子带信号；对第一下行子带信号进行下变频处理，得到第一下行变频信号；根据第一下变频信号对应的网络制式，获取第一下行变频信号中具有网络制式对应的带宽的第一下行载波信号；复用网络制式对应的第一通用公共无线电接口CPRI映射通道对第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，第一CPRI映射通道用于对分布式控制装置从BBU接收的该网络制式的载波信号进行CPRI映射；通过第一CPRI映射帧发送第一下行载波信号。本申请实施例的分布式装置及其信号处理方法，使得该分布式控制装置能够支持多制式的RF馈入信号的同时，节省资源。

Description

分布式基站中的信号处理方法和分布式控制装置 技术领域
本申请涉及无线通信领域，尤其涉及分布式基站中的信号处理方法和分布式控制装置。
背景技术
室内分布系统包括信号源和信号分布系统。其中，信号源为信号分布系统提供无线信号。信号源可以是无线通信系统中的基站、直放式基站或其他设备。信号源提供的信号可以包括以下信号中的任意一种：个人手持电话系统(Personal Handy-phone System，PHS)信号源提供的信号，3G信号、无线局域网络(Wireless Local Area Networks，WLAN)信号、全球移动通信(Global System for Mobile Communication，GSM)信号或码分多址接入(Code Division Multiple Access，CDMA)信号。
一种信号源为BBU+RRU分布式基站，其中，BBU是室内基带处理单元(Building Base band Unit)的简称，RRU是射频拉远单元(Remote Radio Unit)。BBU+RRU分布式基站是相对于传统的集中式基站而言的，其把传统基站的基带部分和射频部分从物理上独立开，中间通过标准的基带射频接口，如通用公共无线电接口(Common Public Radio Interface，CPRI)，进行连接。
BBU与RRU之间还可加入分布式控制单元(Distributed Control Unit，DCU)以及其他单元，以实现BBU与RRU之间的通信。其中，DCU可以支持第三方的射频(Radio Frequency，RF)馈入信号。但是，目前，DCU只能支持GSM制式的RF馈入信号，使得BBU+DCU+RRU模式的分布式基站只能支持单制式RF馈入。
发明内容
本申请提供了分布式基站中的信号处理方法、分布式控制装置，使得该分布式控制装置能够复用分布式控制装置中用于处理BBU相关的载波喜好的CPRI映射通道来处理与RF相关的信号，支持多制式的RF馈入的同时，提高分布式控制装置的资源利用率。
第一方面，本申请提供了一种分布式基站中的信号处理方法，所述信号 处理方法包括：接收射频RF信源馈入的第一下行信号；获取所述第一下行信号中的第一下行子带信号；对所述第一下行子带信号进行下变频处理，得到第一下行变频信号；根据所述第一下变频信号对应的网络制式，获取所述第一下行变频信号中具有所述网络制式对应的带宽的第一下行载波信号；复用所述网络制式对应的第一通用公共无线电接口CPRI映射通道对所述第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，所述第一CPRI映射通道用于对所述分布式控制装置从室内基带处理单元BBU接收的所述网络制式的载波信号进行CPRI映射；通过所述第一CPRI映射帧发送所述第一下行载波信号。
本申请实施例的信号处理方法中，分布式控制装置接收RF信源馈入的下行信号并进行下变频后，将下变频得到的信号进行拆分，得到对应的网络制式的载波信号，然后可以复用用于对BBU发送的载波进行CPRI帧映射的CPRI对根据RF信源馈入的信号中的载波信号进行CPRI帧映射，可以使得该分布式控制装置可以充分利用分布式控制装置中的现有资源对RF信源馈入的不同制式的信号进行处理，从而使得分布式控制装置在支持多制式的RF馈入的同时，提高分布式控制装置的资源利用率。
在一种可能的实现方式中，所述信号处理方法还包括：接收通过第二CPRI帧发送的第一上行信号，所述第一上行信号包括所述网络制式的第一上行载波信号；复用所述网络制式对应的第二CPRI映射通道，获取所述第二CPRI帧中的所述第一上行载波信号，所述第二CPRI映射通道用于获取CPRI帧中发送给所述BBU的所述网络制式的载波信号；合成包含所述第一上行载波信号的第一上行子带信号；对所述第一上行子带信号进行上变频，得到第一上行变频信号；向所述RF信源发送包含所述第一上行变频信号的第一上行信号。
在一种可能的实现方式中，所述信号处理方法还包括：接收所述BBU发送的所述网络制式的第二下行载波信号；使用所述第一CPRI映射通道，对所述第二下行载波信号进行CPRI映射，得到第三CPRI帧；通过所述第三CPRI帧发送所述第二下行载波信号。
在一种可能的实现方式中所述信号处理方法还包括：接收通过第四CPRI帧发送的第二上行载波信号；使用所述第二CPRI映射通道，获取所述第四CPRI帧中的所述第二上行载波信号；向所述BBU发送所述第二上行载 波信号。
第二方面，本申请提供了一种分布式基站中的分布式控制装置，所述分布式控制装置包括用于执行第一方面或任意一种可能的实现方式中的信号处理方法的各个单元。
第三方面，本申请提供了一种分布式基站中的分布式控制装置，该分布式控制装置包括存储器、处理器和通信接口。存储器用于存储程序，处理器用于执行存储器中存储的程序，通信接口用于通信。当处理器执行存储器中的程序时，处理器具体用于调用通信接口实现第一方面或任意一种可能的实现方式中的信号处理方法。
第四方面，本申请提供了一种分布式基站，该分布式基站包括第二方面或第三方面中的分布式控制装置。
附图说明
图1是应用本申请实施例的信号处理方法的应用场景的示意图。
图2是本申请实施例的信号处理方法的示意性流程图。
图3是本申请实施例的分布式控制装置的示意性框架图。
具体实施方式
为了便于理解，先从整体上描述能够实施本申请实施例的信号处理方法的分布式基站的示例架构图。应理解，本申请实施例并不限于图1所示的系统架构中，本申请实施例的信号处理方法和分布式控制装置可以应用的系统中还可以包括其他设备或单元，此外，图1中的装置可以是硬件，也可以是从功能上划分的软件或者以上二者的结合。
BBU 110是基带处理单元，集中控制管理整个基站系统和实现基带信号处理。DCU 120支持RF信源馈入，也可以接收BBU 110发送的信号。基站收发信机(Base Transceiver Station，BTS)130可以向DCU 120RF馈入信号。
pRRU 150为室内小功率射频拉远单元，负责传送和处理BBU 110或BTS 130与天馈系统之间的射频信号。
目前，DCU 120只能支持BTS 130RF馈入的单制式，如GSM制式的信号。对此，本申请提出了一种信号处理方法和分布式控制装置，能够使得 该分布式控制装置能够支持更多制式的RF馈入信源。
图2为本申请实施例的信号处理方法的示意性流程图。应理解，图2示出了信号处理方法的步骤或操作，但这些步骤或操作仅是示例，本申请实施例还可以执行其他操作或者图2中的各个操作的变形。此外，图2中的各个步骤可以按照与图2呈现的不同的顺序来执行，并且有可能并非要执行图2中的全部操作。
可以由分布式基站中的分布式控制装置执行图2所示的信号处理方法，该分布式控制装置可以是图1中所示的DCU 120。
S210，接收RF信源馈入的第一下行信号。
其中，该RF信源可以是图1所示的BTS 130，该第一下行信号中可以包含长期演进(Long Term Evolution，LTE)系统网络制式和/或通用移动通信系统(Universal Mobile Telecommunications System，UMTS)网络制式、或其他网络制式的载波信号。
S220，获取第一下行信号中的第一下行子带信号。
其中，分布式控制装置中可以包括一个或多个变频模块。每个变频模块只能对某一带宽内的信号进行上变频或下变频。因此，若分布式控制装置接收的第一下行信号的带宽超过了每个变频模块能够处理的信号带宽的最大值，则分布式控制装置的变频单元需要将该第一下行信号划分为多个子带信号，即获取该第一下行信号中的所有子带信号。每个子带信号的带宽小于或等于每个变频模块能够处理的信号带宽的上限值。
例如，分布式控制装置最多可以对30个子带信号进行变频，包括上变频和下变频，每个子带信号的带宽上限值为20M。当第一下行信号的带宽为30M时，可以将第一下行信号划分为两个子带信号，其中一个子带信号的带宽可以为20M，另一个子带信号的带宽可以为10M。这样，变频单元可以分别对这两个子带信号进行变频处理。
若第一下行信号的带宽小于上述上限值，则分布式控制装置将对下行信号划分为一个子带信号。
S230，对第一下行子带信号进行下变频处理，得到第一下行变频信号。
分布式控制装置将第一下行信号划分为一个或多个下行子带信号后，分别对这一个或多个下行子带信号中的每个下行子带信号进行下变频处理，得到每个下行子带信号分别对应的下行变频信号。
S240，根据第一下变频信号对应的网络制式，获取所述第一下行变频信号中具有所述网络制式对应的带宽的第一下行载波信号。
分布式控制装置得到下行变频信号后，根据分布式控制装置上预先配置的网络制式信息，将下行变频信号划分为一个或多个下行载波信号。其中，得到的下行载波信号的带宽为对应的网络制式的信号带宽。
具体而言，分布式控制装置中的配置信息可以记录分布式控制装置的端口、分布式控制装置能够处理的信号的网络制式、该网络制式的带宽和该制式的信号的中心频点之间的对应关系。此时，分布式控制装置上预先配置的网络制式信息可以包括网络制式的类型和网络制式的载波带宽之间的对应关系。当然，还可以包括分布式控制装置上接收RF馈入的下行信号的端口、该下行信号的中心频点与该下行信号对应的网络制式信息之间的对应关系。
如，该配置信息中的一个子信息可以为：1/2.0G/5M/UMTS，这表示分布式控制装置的1号端口接收的信号可以包括中点频点为2.0G、带宽为5M、制式为UMTS的信号。
这样，当分布式控制装置下变频得到下变频信号后，可以根据上述配置信息确定该下变频信号对应的配置信息，从而可以得知该下变频信号对应的网络制式、载波带宽等信息。然后分布式控制装置可以将下变频信号划分为带宽等于该网络制式的载波带宽的一个或多个下行载波信号。
该步骤具体可以由分路器实现。
S250，复用该网络制式对应的第一CPRI映射通道对第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，该第一CPRI映射通道用于对分布式控制装置从BBU接收的该网络制式的载波信号进行CPRI映射。
分布式控制装置得到下行载波信号后，对这些下行载波信号进行CPRI映射。具体而言，使用该载波信号对应的网络制式所对应的CPRI映射通道，按照一定CPRI帧结构的格式将这些下行载波信号映射到CPRI帧中。为了后续描述简便，将该CPRI帧结构称为第一CPRI帧结构，将该CPRI帧称为第一CPRI帧。
其中，该载波信号对应的网络制式所对应的CPRI映射通道可以是分布式控制装置中用于对分布式控制装置从BBU接收的该网络制式的载波信号进行CPRI映射的单元，即分布式控制装置中复用用于对分布式控制装置从BBU接收的载波信号进行CPRI映射的CPRI映射通道，对从RF信源馈入 的信号得到载波进行CRPI帧映射。
S260，通过第一CPRI映射帧发送第一下行载波信号。
分布式控制装置将上述下行载波信号映射为第一CPRI帧后，发送该CPRI帧，即发送上述下行载波信号。
本申请实施例的信号处理方法中，分布式控制装置接收RF信源馈入的下行信号并进行下变频后，将下变频得到的信号进行拆分，得到对应的网络制式的载波信号，然后可以复用用于对BBU发送的载波进行CPRI帧映射的CPRI对根据RF信源馈入的信号中的载波信号进行CPRI帧映射，可以使得该分布式控制装置可以充分利用分布式控制装置中的现有资源对RF信源馈入的不同制式的信号进行处理，从而使得分布式控制装置在支持多制式的RF馈入的同时，提高分布式控制装置的资源利用率。
在执行本申请实施例的信号处理方法之前，DCU可以通过人机语音(Man-Machine Language，MML)配置各个子带的频点、带宽和制式信息。DCU配置的制式可以包括GSM制式、LTE制式和通用移动通信系统(Universal Mobile Telecommunications System，UMTS)制式。
DCU配置各个子带的频点、带宽和制式后，可以通知pRRU这些配置信息。
pRRU根据DCU配置的频点，带宽和制式信息，配置中频处理通道，可以复用现有中频处理通道。
本申请实施例中，可选地，该信号处理方法还可以包括：接收通过第二CPRI帧发送的第一上行信号，所述第一上行信号包括所述网络制式的第一上行载波信号；复用所述网络制式对应的第二CPRI映射通道，获取所述第二CPRI帧中的所述第一上行载波信号，所述第二CPRI映射通道用于获取CPRI帧中发送给所述BBU的所述网络制式的载波信号；合成包含所述第一上行载波信号的第一上行子带信号；对所述第一上行子带信号进行上变频，得到第一上行变频信号；向所述RF信源发送包含所述第一上行变频信号的第一上行信号。。
其中，可以由合路器将第一上行载波信号合并成第一上行子带信号。
也就是说，分布式控制装置可以接收满足某个CPRI帧结构格式(如第一CPRI帧结构)的CPRI帧(为了后续描述方便，将其称为第二CPRI帧)，该第二CPRI帧中携带的第一上行信号中可以包括一个或多个载波信号(为 了后续方便，将该载波信号称为第一上行载波信号)。接下来，分布式控制装置从第二CPRI帧中获取或者说分析出每个第一上行载波信号，并根据分布式控制装置上预先配置的网络制式信息，将这些第一上行载波信号合并为一个子带信号(可以将该子带信号称为第一上行子带信号)。然后分布式控制装置可以对第一上行子带信号进行上变频处理，得到对应的第一上行变频信号。最后，分布式控制装置可以在与RF信源连接的第一端口，向RF信源发送该第一上行变频信号。
本申请实施例的信号处理方法，可以使得分布式控制装置可以将任意制式的上行信号转发给RF信源。
本申请实施例中，可选地，分布式控制装置也可以接收BBU发送的下行信号，然后将该下行信号转发出去。具体而言，该信号处理方法还可以包括：接收所述BBU发送的所述网络制式的第二下行载波信号；使用所述第一CPRI映射通道，对所述第二下行载波信号进行CPRI映射，得到第三CPRI帧；通过所述第三CPRI帧发送所述第二下行载波信号。
也就是说，分布式控制装置接收BBU接收的第二下行信号后，可以与现有的DCU中对BBU发送的下行信号的处理方式一样，直接将第二下行信号进行CPRI帧映射，得到满足对应CPRI帧结构的CPRI帧(可以将该CPRI帧称为第三CPRI帧)。第三CPRI帧与第一CPRI帧是同一个CPRI帧。
此时，分布式控制装置从RF信源处和从BBU处接收的相同制式、频点和带宽的信号进行载波级CPRI映射后，可以复用相同的CPRI通道。
本申请实施例中，可选地，该信号处理方法还包括：接收通过第四CPRI帧发送的第二上行载波信号；使用所述第二CPRI映射通道，获取所述第四CPRI帧中的所述第二上行载波信号；向所述BBU发送所述第二上行载波信号。
也就是说，分布式控制装置接收满足对应CPRI帧结构格式的第四CPRI帧，该第四CPRI帧中携带的第二上行信号中可以包括一个或多个载波信号(为了后续方便，将该载波信号称为第二上行载波信号)。接下来，分布式控制装置从第四CPRI帧中获取或者说分析出每个第二上行载波信号，并可以将这些第二上行载波信号合并为一个子带信号(可以将该子带信号称为第二上行子带信号)。最后，分布式控制装置可以在与BBU连接的第二端口，向BBU发送该第二上行子带信号。
本申请实施例中，可选地，分布式控制装置对从RF信源接收的信号也可以进行其他处理。如分布式控制装置接收RF信源发送的下行信号后，可以将该下行信号分为多个子带信号，然后分别对每个子带信号进行下变频处理，再直接对下变频处理得到的变频信号进行CPRI映射，得到对应的CPRI帧，最后通过该对应的CPRI帧将信号发送出去。
同理，本申请实施例中，可选地，分布式控制装置还可以对接收的上行子带信号进行上变频处理，将上变频处理得到的子带变频信号发送给RF信源。
本申请实施例中，分布式控制装置对RF信源馈入的信号进行拆分，得到载波信号，然后对该载波信号进行CRPI映射，然后通过该CRPI映射得到的CRPI帧发送载波信号，与分布式控制装置对RF信源馈入的信号进行子带信号进行CPRI映射再发送的方法相比，至少可以节省一倍的传输带宽，发送功率也可以至少提升一倍。
图3为本申请实施例的分布式控制装置的示意性框架图。应理解，图3示出的装置仅是示例，本申请实施例的分布式控制装置还可包括其他模块或单元，或者包括与图3中的各个模块的功能相似的模块，或者并非要包括图3中的所有模块。
应理解，图3所示的本申请实施例的分布式控制装置中的各个单元的上述和其它操作和/或功能分别为了实现图2中的信号处理方法的相应流程，为了简洁，在此不再赘述。
通信单元310，用于接收射频RF信源馈入的第一下行信号。
变频单元320，用于获取所述第一下行信号中的第一下行子带信号。
所述变频单元320还用于对所述第一下行子带信号进行下变频处理，得到第一下行变频信号；
载波处理单元330，用于根据所述第一下变频信号对应的网络制式，获取所述第一下行变频信号中具有所述网络制式对应的带宽的第一下行载波信号；
所述载波处理单元330还用于复用所述网络制式对应的第一通用公共无线电接口CPRI映射通道对所述第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，所述第一CPRI映射通道用于对所述分布式控制装置从室内基带处理单元BBU接收的所述网络制式的载波信号进行CPRI映射；
所述通信单元310还用于通过所述第一CPRI映射帧发送所述第一下行载波信号。
本申请实施例中，分布式控制装置接收RF信源馈入的下行信号并进行下变频后，将下变频得到的信号进行拆分，得到对应的网络制式的载波信号，然后通过CPRI帧发送拆分得到的载波信号，从而可以使得该分布式控制装置接收RF信源馈入的不同制式的信号后，均可以进行处理并转发。
本申请实施例中，可选地，所述通信单元还用于接收通过第二CPRI帧发送的第一上行信号，所述第一上行信号包括所述网络制式的第一上行载波信号；所述载波处理单元还用于复用所述网络制式对应的第二CPRI映射通道，获取所述第二CPRI帧中的所述第一上行载波信号，所述第二CPRI映射通道用于获取CPRI帧中发送给所述BBU的所述网络制式的载波信号；所述载波处理单元还用于合成包含所述第一上行载波信号的第一上行子带信号；所述变频单元还用于对所述第一上行子带信号进行上变频，得到第一上行变频信号；所述通信单元还用于向所述RF信源发送包含所述第一上行变频信号的第一上行信号。
本申请实施例中，可选地，所述通信单元还用于接收所述BBU发送的所述网络制式的第二下行载波信号；所述载波处理模块还用于使用所述第一CPRI映射通道，对所述第二下行载波信号进行CPRI映射，得到第三CPRI帧；所述通信接单元还用于通过所述第三CPRI帧发送所述第二下行载波信号。
本申请实施例中，可选地，所述通信单元还用于接收通过第四CPRI帧发送的第二上行载波信号；所述载波处理单元还用于使用所述第二CPRI映射通道，获取所述第四CPRI帧中的所述第二上行载波信号；所述通信接口还用于向所述BBU发送所述第二上行载波信号。
应理解，图3所示本申请实施例的分布式控制装置中的各个单元的上述和其它操作和/或功能分别为了实现图2中的信号处理方法的相应流程，为了简洁，在此不再赘述。
本申请另一个实施例的分布式控制装置包括通信接口、存储器和处理器。其中存储器用于存储程序，处理器用于执行存储器中的程序，通信接口用于与其他设备或单元通信。
具体而言，本申请实施例的分布式控制装置中的通信接口用于执行图3 中的通信单元执行的操作，处理器用于执行图3中的变频单元和载波处理单元执行的操作。为了简介，此处不再赘述。
本申请实施例还提供了一种分布式基站，该分布式基站包括图3所示的分布式控制装置，为了简洁，此处不再赘述。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
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，在本申请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。
所述功能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，本申请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)执行本申请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，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (9)

  1. 一种分布式基站中的信号处理方法，其特征在于，所述信号处理方法包括：
    接收射频RF信源馈入的第一下行信号；
    获取所述第一下行信号中的第一下行子带信号；
    对所述第一下行子带信号进行下变频处理，得到第一下行变频信号；
    根据所述第一下变频信号对应的网络制式，获取所述第一下行变频信号中具有所述网络制式对应的带宽的第一下行载波信号；
    复用所述网络制式对应的第一通用公共无线电接口CPRI映射通道对所述第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，所述第一CPRI映射通道用于对所述分布式控制装置从室内基带处理单元BBU接收的所述网络制式的载波信号进行CPRI映射；
    通过所述第一CPRI映射帧发送所述第一下行载波信号。
  2. 根据权利要求1所述的信号处理方法，其特征在于，所述信号处理方法还包括：
    接收通过第二CPRI帧发送的第一上行信号，所述第一上行信号包括所述网络制式的第一上行载波信号；
    复用所述网络制式对应的第二CPRI映射通道，获取所述第二CPRI帧中的所述第一上行载波信号，所述第二CPRI映射通道用于获取CPRI帧中发送给所述BBU的所述网络制式的载波信号；
    合成包含所述第一上行载波信号的第一上行子带信号；
    对所述第一上行子带信号进行上变频，得到第一上行变频信号；
    向所述RF信源发送包含所述第一上行变频信号的第一上行信号。
  3. 根据权利要求1或2所述的信号处理方法，其特征在于，所述信号处理方法还包括：
    接收所述BBU发送的所述网络制式的第二下行载波信号；
    使用所述第一CPRI映射通道，对所述第二下行载波信号进行CPRI映射，得到第三CPRI帧；
    通过所述第三CPRI帧发送所述第二下行载波信号。
  4. 根据权利要求3所述的信号处理方法，其特征在于，所述信号处理方法还包括：
    接收通过第四CPRI帧发送的第二上行载波信号；
    使用所述第二CPRI映射通道，获取所述第四CPRI帧中的所述第二上行载波信号；
    向所述BBU发送所述第二上行载波信号。
  5. 一种分布式基站中的分布式控制装置，其特征在于，包括：
    通信单元，用于接收射频RF信源馈入的第一下行信号；
    变频单元，用于获取所述第一下行信号中的第一下行子带信号；
    所述变频单元还用于对所述第一下行子带信号进行下变频处理，得到第一下行变频信号；
    载波处理单元，用于根据所述第一下变频信号对应的网络制式，获取所述第一下行变频信号中具有所述网络制式对应的带宽的第一下行载波信号；
    所述载波处理单元还用于复用所述网络制式对应的第一通用公共无线电接口CPRI映射通道对所述第一下行载波信号进行CPRI映射，得到第一CPRI映射帧，所述第一CPRI映射通道用于对所述分布式控制装置从室内基带处理单元BBU接收的所述网络制式的载波信号进行CPRI映射；
    所述通信单元还用于通过所述第一CPRI映射帧发送所述第一下行载波信号。
  6. 根据权利要求5所述的分布式控制装置，其特征在于，所述通信单元还用于接收通过第二CPRI帧发送的第一上行信号，所述第一上行信号包括所述网络制式的第一上行载波信号；
    所述载波处理单元还用于复用所述网络制式对应的第二CPRI映射通道，获取所述第二CPRI帧中的所述第一上行载波信号，所述第二CPRI映射通道用于获取CPRI帧中发送给所述BBU的所述网络制式的载波信号；
    所述载波处理单元还用于合成包含所述第一上行载波信号的第一上行子带信号；
    所述变频单元还用于对所述第一上行子带信号进行上变频，得到第一上行变频信号；
    所述通信单元还用于向所述RF信源发送包含所述第一上行变频信号的第一上行信号。
  7. 根据权利要求5或6所述的分布式控制装置，其特征在于，所述通信单元还用于接收所述BBU发送的所述网络制式的第二下行载波信号；
    所述载波处理模块还用于使用所述第一CPRI映射通道，对所述第二下行载波信号进行CPRI映射，得到第三CPRI帧；
    所述通信接单元还用于通过所述第三CPRI帧发送所述第二下行载波信号。
  8. 根据权利要求7所述的分布式控制装置，其特征在于，所述通信单元还用于接收通过第四CPRI帧发送的第二上行载波信号；
    所述载波处理单元还用于使用所述第二CPRI映射通道，获取所述第四CPRI帧中的所述第二上行载波信号；
    所述通信接口还用于向所述BBU发送所述第二上行载波信号。
  9. 一种分布式基站，其特征在于，包括权利要求5至权利要求8中任一项所述的分布式控制装置。
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