WO2018077107A1 - 一种在rru侧进行时延补偿的方法及装置和计算机存储介质 - Google Patents

一种在rru侧进行时延补偿的方法及装置和计算机存储介质 Download PDF

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WO2018077107A1
WO2018077107A1 PCT/CN2017/106878 CN2017106878W WO2018077107A1 WO 2018077107 A1 WO2018077107 A1 WO 2018077107A1 CN 2017106878 W CN2017106878 W CN 2017106878W WO 2018077107 A1 WO2018077107 A1 WO 2018077107A1
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delay
carrier
processing
bbu
transmission
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PCT/CN2017/106878
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English (en)
French (fr)
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叶涛
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/25—Arrangements specific to fibre transmission
    • H04B10/2575—Radio-over-fibre, e.g. radio frequency signal modulated onto an optical carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/0635—Clock or time synchronisation in a network
    • H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging

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  • the present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for delay compensation on a RRU (Remote Radio Unit) side and a computer storage medium.
  • RRU Remote Radio Unit
  • RRU has become a mainstream design solution.
  • the RRU and the BBU Building Base Band Unit
  • the RRU and the BBU are generally connected to each other by optical fibers.
  • Time-based communication system TDD Time Division Duplexing
  • TDD Time Division Duplexing
  • all RRUs in the same network require synchronization at the transmission point (air interface); transmission (downlink) and reception of the same RRU ( The time slot switching points of the uplink are to be aligned.
  • the data between different RRUs is generally not aligned. Because the fibers connected by different RRUs and BBUs are not the same length, that is, the time that data is transmitted on the fiber is different. Then, even if the data of different RRUs is sent from the BBU at the same time, the time of transmission to the RRU is different;
  • the data between different carriers of the same RRU is also misaligned. Because a carrier in a modern TDD system needs to process a large amount of data, it is generally required to allocate a dedicated DSP processing unit for processing. Different carriers are processed by different DSP (Digital Signal Processing) processing units. Different carriers, their processing time, and the time from the DSP processing unit to the optical port are also different.
  • DSP Digital Signal Processing
  • the TDD system defines the IR protocol between the BBU and the RRU, but the protocol can only solve the first problem, that is, how the data between different RRUs is aligned.
  • the second problem is the data between different carriers of the same RRU. How to align can't be solved.
  • a technical problem solved by the solution provided by the embodiment of the present invention is that data between the RRUs and data between different carriers of the same RRU are not simultaneously aligned.
  • the RRU receives and saves the propagation delay of the data sent by the BBU on the optical fiber
  • the RRU After the BBU allocates the data carried by each carrier to the corresponding DSP processing unit for processing and distributes the processed data to the corresponding transmission unit of the optical port for transmission, the RRU receives and saves the processing of each DSP processing unit sent by the BBU. a first correspondence between the delay and the corresponding transmission unit, and a second correspondence between each carrier and the corresponding transmission unit;
  • the RRU searches for the processing delay experienced by each carrier according to the first correspondence relationship and the second correspondence relationship, and performs corresponding delay on data carried by different carriers by using the processing delay and the propagation delay. make up;
  • the method before the RRU receives and saves the propagation delay of the data sent by the BBU on the optical fiber, the method further includes:
  • the BBU sends a delay measurement request to the RRU to obtain a first forwarding delay between the uplink fiber and the downlink fiber on the RRU side.
  • the BBU calculates the propagation delay of the data on the optical fiber according to the second forwarding delay between the upstream optical fiber and the downstream optical fiber and the obtained first forwarding delay according to the data, and the calculated data is propagated on the optical fiber. Delay sent to the RRU.
  • the BBU allocates data carried by each carrier to a corresponding DSP processing unit for processing and allocates the processed data to a transmission unit corresponding to the optical port for transmission, including:
  • the BBU allocates data carried by each carrier to a corresponding one of the DSP processing units for processing, and establishes a processing relationship between each carrier and the DSP processing unit;
  • the BBU After establishing the corresponding relationship, the BBU allocates data processed by the DSP processing unit to a plurality of transmission units corresponding to the optical port for transmission, and establishes a transmission relationship between the DSP processing unit and the plurality of transmission units.
  • the RRU receives and saves a first correspondence between a processing delay of each DSP processing unit sent by a BBU and a corresponding transmission unit, and a second correspondence between each carrier and a corresponding transmission unit includes:
  • the BBU obtains a first correspondence between the processing delay of each DSP processing unit and the corresponding transmission unit according to the established transmission relationship;
  • the BBU obtains the second of each carrier and the corresponding transmission unit according to the established transmission relationship and processing relationship. Correspondence relationship
  • the BBU sends the obtained first correspondence and second correspondence to the RRU.
  • the RRU searches for a processing delay experienced by each carrier according to the first correspondence relationship and the second correspondence relationship, and utilizes the processing delay and the propagation delay pair.
  • the corresponding delay compensation for data carried by different carriers includes:
  • the RRU searches for a transmission unit corresponding to each carrier according to the first correspondence relationship and the second correspondence relationship, and searches for a DSP processing unit corresponding to the transmission unit according to the found transmission unit;
  • the RRU takes the processing delay of the found DSP processing unit as the carrier delay of the carrier, and uses the carrier delay and the propagation delay to perform corresponding delay compensation on data carried by different carriers.
  • a first saving module configured to receive and save a propagation delay of the data sent by the BBU on the optical fiber
  • a second saving module configured to: when the BBU allocates data carried by each carrier to a corresponding DSP processing unit for processing, and distributes the processed data to a corresponding transmission unit of the optical port for transmission, receiving and saving each sent by the BBU a first correspondence between a processing delay of the DSP processing unit and the corresponding transmission unit, and a second correspondence between each carrier and the corresponding transmission unit;
  • a delay compensation module configured to search for a processing delay experienced by each carrier according to the first correspondence relationship and the second correspondence, and use the processing delay and the propagation delay to carry different carriers The data is compensated for the corresponding delay.
  • the method further includes a BBU module, configured to obtain, by sending a delay measurement request to the RRU, a first forwarding delay between the uplink fiber and the downlink fiber of the RRU side data, and the uplink fiber according to the data thereof.
  • the second forwarding delay between the downlink fibers and the obtained first forwarding delay, and the propagation delay of the data on the optical fiber is calculated.
  • the BBU module is configured to allocate data carried by each carrier to a corresponding one of the DSP processing units for processing, and establish a processing relationship between each carrier and the DSP processing unit, and After the corresponding relationship is described, the data processed by the DSP processing unit is allocated to a plurality of transmission units corresponding to the optical port for transmission, and the transmission relationship between the DSP processing unit and the plurality of transmission units is established.
  • the BBU module is configured to obtain, according to the established transmission relationship, a first correspondence between a processing delay of each DSP processing unit and a corresponding transmission unit, and according to the established transmission relationship and processing. Relationship, obtaining a second correspondence between each carrier and a corresponding transmission unit.
  • the delay compensation module includes:
  • a searching unit configured to search for a transmission unit corresponding to each carrier according to the first correspondence relationship and the second correspondence relationship, and further search for a DSP processing unit corresponding to the transmission unit according to the found transmission unit ;
  • a delay compensation unit configured to use a processing delay of the found DSP processing unit as a carrier delay of the carrier, and use the carrier delay and the propagation delay to perform data corresponding to different carriers Delay compensation.
  • the embodiment of the present invention further provides a computer storage medium, where the computer storage medium stores one or more programs executable by a computer, and when the one or more programs are executed by the computer, the computer is executed to perform any The aforementioned method.
  • the transmission delay and the processing delay are used, and the data between the RRUs and the data between the different carriers of the same RRU are aligned, and time synchronization is achieved.
  • FIG. 1 is a flowchart of a method for performing delay compensation on an RRU side according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an apparatus for performing delay compensation on an RRU side according to an embodiment of the present invention
  • FIG. 3 is a flowchart of delay compensation provided by an embodiment of the present invention.
  • FIG. 1 is a flowchart of a method for performing delay compensation on an RRU side according to an embodiment of the present invention. As shown in FIG. 1, the method includes:
  • Step S101 The RRU receives and saves a propagation delay of the data sent by the BBU on the optical fiber.
  • Step S102 After the BBU allocates the data carried by each carrier to the corresponding DSP processing unit for processing and distributes the processed data to the transmission unit corresponding to the optical port for transmission, the RRU receives and saves each DSP processing sent by the BBU. a first correspondence between the processing delay of the unit and the corresponding transmission unit, and a second correspondence between each carrier and the corresponding transmission unit;
  • Step S103 The RRU searches for each carrier according to the first correspondence and the second correspondence. Processing delays experienced, and using the processing delay and the propagation delay to perform corresponding delay compensation on data carried by different carriers.
  • the method further includes: the BBU sends the delay measurement request to the RRU, and obtains the first forwarding between the uplink fiber and the downlink fiber by the RRU side data. Delay; the BBU calculates the propagation delay of the data on the optical fiber according to the second forwarding delay between the upstream optical fiber and the downstream optical fiber and the obtained first forwarding delay, and calculates the calculated data on the optical fiber. The propagation delay is sent to the RRU.
  • the BBU allocates the data carried by each carrier to the corresponding DSP processing unit for processing, and allocates the processed data to the transmission unit corresponding to the optical port for transmission: the BBU allocates data carried by each carrier to the corresponding Processing in a DSP processing unit, and establishing a processing relationship between each carrier and the DSP processing unit; after establishing the corresponding relationship, the BBU allocates data processed by the DSP processing unit to a plurality of transmission units corresponding to the optical port thereof. The transmission is performed, and the transmission relationship between the DSP processing unit and the plurality of transmission units is established.
  • the RRU receives and saves the first correspondence between the processing delay of each DSP processing unit sent by the BBU and the corresponding transmission unit, and before the second correspondence between each carrier and the corresponding transmission unit, the BRU further includes:
  • the established transmission relationship obtains a first correspondence between the processing delay of each DSP processing unit and the corresponding transmission unit; the BBU obtains a second correspondence between each carrier and the corresponding transmission unit according to the established transmission relationship and processing relationship.
  • the BBU sends the obtained first correspondence and second correspondence to the RRU.
  • the RRU searches for the processing delay experienced by each carrier according to the first correspondence relationship and the second correspondence, and uses the processing delay and the propagation delay to carry data on different carriers.
  • Performing the corresponding delay compensation includes: the RRU searches for the corresponding transmission unit of each carrier according to the first correspondence relationship and the second correspondence, and searches for the corresponding transmission unit according to the found transmission unit.
  • the processing unit of the DSP processing unit uses the processing delay of the found DSP processing unit as the carrier delay of the carrier, and uses the carrier delay and the propagation delay to perform corresponding delay compensation on data carried by different carriers. .
  • FIG. 2 is a schematic diagram of an apparatus for performing time delay compensation on an RRU side according to an embodiment of the present invention.
  • the method includes: a first saving module 201, configured to receive and save the data transmitted by the BBU on the optical fiber.
  • the second saving module 202 is configured to: when the BBU allocates data carried by each carrier to the corresponding DSP processing unit for processing, and distributes the processed data to the transmission unit corresponding to the optical port, and transmits the data.
  • a delay compensation module 203 configured to use the first Corresponding relationship and the second correspondence, searching for a processing delay experienced by each carrier, and performing corresponding delay compensation on data carried by different carriers by using the processing delay and the propagation delay.
  • the embodiment of the present invention further includes a BBU module, configured to obtain a first forwarding delay between the uplink fiber and the downlink fiber by using the delay measurement request to the RRU, and obtain the first forwarding delay between the uplink fiber and the downlink fiber according to the data, and the uplink fiber and the downlink fiber according to the data.
  • the second forwarding delay between the two and the obtained first forwarding delay calculating the propagation delay of the data on the optical fiber.
  • the BBU module is configured to allocate data carried by each carrier to a corresponding one of the DSP processing units for processing, and establish a processing relationship between each carrier and the DSP processing unit, and after establishing the corresponding relationship,
  • the data processed by the DSP processing unit is allocated to a plurality of transmission units corresponding to the optical port for transmission, and the transmission relationship between the DSP processing unit and the plurality of transmission units is established.
  • the BBU module is configured to obtain, according to the established transmission relationship, a first correspondence between a processing delay of each DSP processing unit and a corresponding transmission unit, and obtain each according to the established transmission relationship and processing relationship. A second correspondence between the carrier and the corresponding transmission unit.
  • the time delay compensation module 203 includes: a searching unit, configured to search for a transmission unit corresponding to each carrier according to the first correspondence relationship and the second correspondence relationship, and according to the found transmission unit, Locating a DSP processing unit corresponding to the transmission unit; a delay compensation unit, configured to use a processing delay of the found DSP processing unit as a carrier delay of the carrier, and using the carrier delay and the The propagation delay compensates the data carried by different carriers with corresponding delay.
  • modules or steps of the embodiments of the present invention can be implemented by a general computing device, which can be concentrated on a single computing device or distributed in multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from The steps shown or described are performed sequentially, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.
  • Embodiments of the present invention also provide a storage medium.
  • the above storage medium may be arranged to store steps for performing the methods provided by embodiments of the present invention.
  • the foregoing storage medium may include, but is not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, a magnetic disk, or an optical disk. And other media that can store program code.
  • FIG. 3 is a flowchart of delay compensation according to an embodiment of the present invention.
  • the BBU includes an BBU and an RRU.
  • the BBU includes a product OAM (Operation Administration and Maintenance) and a TCM. as follows:
  • the RRU reports its own caching capability to the TCM, which is the delay adjustment capability
  • the TCM sends a delay measurement request to the RRU to obtain a forwarding delay between the RRU uplink fiber and the downlink fiber, which is recorded as T 23 ;
  • the BBU calculates the forwarding delay between its own upstream and downstream fibers, denoted as T 14 , and calculates the propagation delay T 12 on the fiber using the following formula.
  • the propagation delay T 12 is less than or equal to the delay adjustment capability.
  • the TCM sends T 12 to the RRU, so that the RRU uses the propagation delay T 12 to compensate the transmission delay of the data on the optical fiber;
  • the BBU allocates data of the same carrier to the same DSP processing unit for processing, and at the same time, distributes the data processed by the DSP processing unit to different transmission units on different optical fibers for transmission;
  • the product OAM sends the processing delay of the different DSP processing units and the corresponding relationship of the corresponding transmission unit to the RRU, and the RRU should temporarily store the data;
  • the product OAM sends the correspondence between the transmission unit of the optical port and the carrier (IQ exchange parameter) to the RRU;
  • the RRU finds the corresponding transmission unit according to the carrier number, and then finds the processing delay of the DSP processing unit according to the transmission unit, and compensates by using the processing delay, so that the delay compensation between carriers can be completed. If the delay compensation capability on the RRU side is insufficient, it is insufficient to complete the compensation required by the BBU. At this time, the RRU returns to failure. Then the BBU will not initiate business on this RRU.
  • the transmission delay and the processing delay are used, and the data between the RRUs and the data between the different carriers of the same RRU are aligned, and time synchronization is achieved.
  • the technical solutions provided by the embodiments of the present invention can be applied to the field of communications technologies. According to the solution provided by the embodiment of the present invention, the transmission delay and the processing delay are used, and the data between the RRUs and the data between the different carriers of the same RRU are aligned, and time synchronization is achieved.

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Abstract

一种在RRU侧进行时延补偿的方法及装置，涉及通信技术领域，其方法包括：RRU接收并保存BBU发送的数据在光纤上的传播时延；当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿。

Description

一种在RRU侧进行时延补偿的方法及装置和计算机存储介质 技术领域
本公开涉及通信技术领域，特别涉及一种在RRU(Remote Radio Unit，远端射频单元)侧进行时延补偿的方法及装置和计算机存储介质。
背景技术
目前的通信设备中，RRU已经成为主流设计方案。RRU和BBU(Building Base band Unit，室内基带处理单元)之间一般通过光纤互相连接。
基于时分的通信系统TDD(Time Division Duplexing，时分双工)对时间同步的要求非常高:同一网络中所有的RRU要求在发射点(空口)要同步；同一个RRU的发射(下行)和接收(上行)的时隙切换点要对齐。
但是，不同载波之间的数据一般是不对齐的。原因有两个：
第一，不同的RRU之间数据一般是不对齐的。因为不同的RRU和BBU连接的光纤不等长，也就是数据在光纤上传送的时间不一样。那么不同RRU的数据即使同时从BBU发出，那么传输到RRU上的时间也不一样；
第二，同一个RRU的不同载波间的数据也是不对齐的。因为现代TDD系统中一个载波需要处理的数据量较大，一般需要分配一个专门的DSP处理单元来处理，不同的载波是由不同的DSP(Digital Signal Processing，数字信号处理)处理单元来处理的所以不同的载波，它们的处理时间，以及从DSP处理单元到光口的时间也不一样。
TDD系统在BBU和RRU之间定义了IR协议，但是该协议只能解决第一个问题，即不同RRU之间的数据如何对齐，第二个问题，也就是同一个RRU的不同载波之间数据如何对齐无法解决。
发明内容
根据本发明实施例提供的方案解决的技术问题是各个RRU之间的数据和同一个RRU的不同载波间的数据没有同时对齐。
根据本发明实施例提供的一种在RRU侧进行时延补偿的方法，包括：
RRU接收并保存BBU发送的数据在光纤上的传播时延；
当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；
RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿；
其中，所述RRU是指远端射频单元；所述BBU是指基带处理单元；所述DSP是指数字信号处理。
根据一示例性实施例，所述RRU接收并保存BBU发送的数据在光纤上的传播时延之前，还包括：
BBU通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延；
BBU根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延，并将所计算的数据在光纤上的传播时延发送给RRU。
根据一示例性实施例，所述BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输包括：
BBU将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系；
BBU在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
根据一示例性实施例，所述RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系包括：
BBU根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系；
BBU根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二 对应关系；
BBU将所得到的第一对应关系和第二对应关系发送给RRU。
根据一示例性实施例，所述RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿包括：
RRU根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；
RRU将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
根据本发明实施例提供的一种在RRU侧进行时延补偿的装置，包括：
第一保存模块，用于接收并保存BBU发送的数据在光纤上的传播时延；
第二保存模块，用于当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；
时延补偿模块，用于根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
根据一示例性实施例，还包括BBU模块，用于通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延，以及根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延。
根据一示例性实施例，所述BBU模块，用于将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系，以及在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
根据一示例性实施例，所述BBU模块，用于根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二对应关系。
根据一示例性实施例，所述时延补偿模块包括：
查找单元，用于根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；
时延补偿单元，用于将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
本发明实施例还提供一种计算机存储介质，所述计算机存储介质中存储有计算机可执行的一个或多个程序，所述一个或多个程序被所述计算机执行时使所述计算机执行任一前述方法。
根据本发明实施例提供的方案，利用传输时延和处理时延，同时对齐了各个RRU之间的数据和同一个RRU的不同载波间的数据，达到了时间的同步。
附图说明
图1是本发明实施例提供的一种在RRU侧进行时延补偿的方法流程图；
图2是本发明实施例提供的一种在RRU侧进行时延补偿的装置示意图；
图3是本发明实施例提供的时延补偿的流程图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明，应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
图1是本发明实施例提供的一种在RRU侧进行时延补偿的方法流程图，如图1所示，包括：
步骤S101：RRU接收并保存BBU发送的数据在光纤上的传播时延；
步骤S102：当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；
步骤S103：RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所 经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
其中，所述RRU接收并保存BBU发送的数据在光纤上的传播时延之前，还包括：BBU通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延；BBU根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延，并将所计算的数据在光纤上的传播时延发送给RRU。
其中，所述BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输包括：BBU将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系；BBU在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
其中，所述RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系之前，还包括：BBU根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系；BBU根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二对应关系；BBU将所得到的第一对应关系和第二对应关系发送给RRU。
其中，所述RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿包括：RRU根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；RRU将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
图2是本发明实施例提供的一种在RRU侧进行时延补偿的装置示意图，如图2所示，包括：第一保存模块201，用于接收并保存BBU发送的数据在光纤上的传播时延；第二保存模块202，用于当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，接收并 保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；时延补偿模块203，用于根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
本发明实施例还包括BBU模块，用于通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延，以及根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延。
其中，所述BBU模块，用于将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系，以及在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
其中，所述BBU模块，用于根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二对应关系。
其中，所述时延补偿模块203包括：查找单元，用于根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；时延补偿单元，用于将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
显然，本领域的技术人员应该明白，上述的本发明实施例的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特定的硬件和软件结合。
本发明的实施例还提供了一种存储介质。上述存储介质可以被设置为存储用于执行本发明实施例提供的方法中的步骤。
根据一示例性实施例，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
图3是本发明实施例提供的时延补偿的流程图，如图3所示，包括BBU和RRU，其中，BBU包括产品OAM(Operation Administration and Maintenance，操作、管理和维护)和TCM，具体步骤如下：
第一步，RRU向TCM报告自身的缓存能力，也就是时延调整能力；
第二步，TCM通过向RRU发送时延测量请求，得到RRU上行光纤和下行光纤之间的转发时延，记作T23；
第三步，BBU计算自己上行光纤和下行光纤之间的转发时延，记作T14，并使用下面公式计算光纤上的传播时延T12
T12*2＝T14–T23
所述传播时延T12小于等于时延调整能力。
第四步，TCM将T12发送给RRU，以便RRU使用传播时延T12来补偿数据在光纤上的传输时延；
第五步，BBU将同一个载波的数据分配给同一个DSP处理单元处理，同时，将该DSP处理单元所处理的数据分配到不同光纤上的不同传输单元进行传输；
第六步，产品OAM将不同DSP处理单元的处理时延和对应的传输单元的对应关系发送给RRU，RRU应暂存该数据；
第七步，产品OAM将光口的传输单元与载波的对应关系(IQ交换参数)发送给RRU；
第七步，RRU根据载波号找到对应的传输单元，再根据传输单元找到它们的DSP处理单元的处理时延，并用该处理时延进行补偿，这样就可以完成载波间的时延补偿。如果RRU侧的时延补偿能力不足，不足以完成BBU要求的补偿，此时RRU返回失败。那么BBU就不会在此RRU上进行发起业务。
根据本发明实施例提供的方案，利用传输时延和处理时延，同时对齐了各个RRU之间的数据和同一个RRU的不同载波间的数据，达到了时间的同步。
尽管上文对本发明进行了详细说明，但是本发明不限于此，本技术领域技术人员可以根据本发明的原理进行各种修改。因此，凡按照本发明原理所作的修改，都应当 理解为落入本发明的保护范围。
工业实用性
本发明实施例提供的技术方案可以应用于通信技术领域。根据本发明实施例提供的方案，利用传输时延和处理时延，同时对齐了各个RRU之间的数据和同一个RRU的不同载波间的数据，达到了时间的同步。

Claims (11)

  1. 一种在RRU侧进行时延补偿的方法，包括：
    RRU接收并保存BBU发送的数据在光纤上的传播时延；
    当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；
    RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿；
    其中，所述RRU是指远端射频单元；所述BBU是指基带处理单元；所述DSP是指数字信号处理。
  2. 根据权利要求1所述的方法，所述RRU接收并保存BBU发送的数据在光纤上的传播时延之前，还包括：
    BBU通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延；
    BBU根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延，并将所计算的数据在光纤上的传播时延发送给RRU。
  3. 根据权利要求1所述的方法，所述BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输包括：
    BBU将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系；
    BBU在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
  4. 根据权利要求3所述的方法，所述RRU接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单 元的第二对应关系之前，还包括：
    BBU根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系；
    BBU根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二对应关系；
    BBU将所得到的第一对应关系和第二对应关系发送给RRU。
  5. 根据权利要求4所述的方法，所述RRU根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿包括：
    RRU根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；
    RRU将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
  6. 一种在RRU侧进行时延补偿的装置，包括：
    第一保存模块，设置为接收并保存BBU发送的数据在光纤上的传播时延；
    第二保存模块，设置为当BBU将各个载波承载的数据分配给对应的DSP处理单元进行处理并将其处理的数据分配给其光口对应的传输单元进行传输后，接收并保存BBU发送的每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及每个载波与相应传输单元的第二对应关系；
    时延补偿模块，设置为根据所述第一对应关系和所述第二对应关系，查找每个载波所经历的处理时延，并利用所述处理时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
  7. 根据权利要求6所述的装置，还包括BBU模块，设置为通过向RRU发送时延测量请求，得到RRU侧数据在上行光纤和下行光纤之间的第一转发时延，以及根据其数据在上行光纤和下行光纤之间的第二转发时延与所得到的第一转发时延，计算数据在光纤上的传播时延。
  8. 根据权利要求7所述的装置，所述BBU模块，设置为将每个载波承载的数据分配给对应的一个DSP处理单元中进行处理，并建立每个载波与DSP处理单元的处理关系，以及在建立所述对应关系后，将DSP处理单元处理的数据分配给其光口 对应的多个传输单元上进行传输，并建立DSP处理单元与多个传输单元的传输关系。
  9. 根据权利要求8所述的装置，所述BBU模块，设置为根据所建立的传输关系，得到每个DSP处理单元的处理时延与相应传输单元的第一对应关系，以及根据所建立的传输关系和处理关系，得到每个载波与相应传输单元的第二对应关系。
  10. 根据权利要求9所述的装置，所述时延补偿模块包括：
    查找单元，设置为根据所述第一对应关系和所述第二对应关系，查找每个载波相对应的传输单元，再根据所查找到的传输单元，查找所述传输单元相对应的DSP处理单元；
    时延补偿单元，设置为将所查找到的DSP处理单元的处理时延作为所述载波的载波时延，并利用所述载波时延和所述传播时延对不同载波承载的数据进行相应时延补偿。
  11. 一种计算机存储介质，所述计算机存储介质中存储有计算机可执行的一个或多个程序，所述一个或多个程序被所述计算机执行时使所述计算机执行根据权利要求1-5中任一项所述的方法。
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