WO2016082567A1 - 一种数据传输时延的校正方法及装置 - Google Patents

一种数据传输时延的校正方法及装置 Download PDF

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WO2016082567A1
WO2016082567A1 PCT/CN2015/084701 CN2015084701W WO2016082567A1 WO 2016082567 A1 WO2016082567 A1 WO 2016082567A1 CN 2015084701 W CN2015084701 W CN 2015084701W WO 2016082567 A1 WO2016082567 A1 WO 2016082567A1
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data
preset
chip
protocol
baseband
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PCT/CN2015/084701
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English (en)
French (fr)
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王宇杰
周永生
肖黎英
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • 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

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  • This document relates to the field of communication technologies, and in particular, to a method and apparatus for correcting data transmission delay.
  • TD-SCDMA Time Division Synchronous Code Division Multiple Access
  • KPI Key Performance Indicator
  • the TD-SCDMA NodeB receives media plane data from the RNC (Radio Network Controller) side and converts the media data into IQ (in-phase quadature) Data is sent from the air interface after a certain path.
  • RNC Radio Network Controller
  • the BBU Building Base Band Unite
  • the BBU Building Base Band Unite
  • the data sent by the data switching module can be converted into an optical signal and transmitted to the RRU through the optical fiber (Radio Remote Unit).
  • the radio remote unit is re-framed by the RRU and sent to the air interface, and the uplink data is transmitted by the air interface to the baseband along the opposite path.
  • IQ delay in-phase orthogonal data delay
  • the usual method is to pre-measure the delay values of different types of boards, different protocols, and different slots, record the delay value, and then, after the baseband resources are allocated, each time according to the transmission path.
  • the delay value is compensated.
  • the pre-measured delay value is calculated in nanoseconds, and the delay compensation is performed in accordance with the TD-SCDMA chip, one chip is equal to 781.25 nanoseconds. In this way, due to the error caused by the test, the actual difference of the hardware, and the rounding of the nanosecond to the chip, there is still a certain degree of delay error after the compensation, so that the communication quality is degraded.
  • the embodiment of the invention provides a method and a device for correcting data transmission delay, which are used to solve the problem that the IQ data transmission delay in the related art is difficult to be accurately calibrated and the communication quality is low.
  • An embodiment of the present invention provides a method for correcting a data transmission delay, including: instructing an RRU and a baseband to transmit preset data between the two according to an IR protocol, where the preset data includes at least two data groups; Whether the lower data frame corresponds to the data group transmitted under the IR protocol; and if the data frame does not correspond to the data group, the baseband is notified to perform delay adjustment.
  • the indicating that the RRU and the baseband transmit preset data between the two according to the IR protocol includes: indicating that one of the RRU and the baseband sends the preset data, instructing another party to receive the preset The data compares the received data set in the preset data with a data frame under a preset chip.
  • comparing by comparing the data group in the received preset data with the data frame in the preset chip, by: receiving data in the data group of the preset group number, and Comparing the data in each chip, determining a chip number of the chip corresponding to the data in the preset group number; using the difference between the chip number and the preset group number as the data The result of the comparison of the group with the data frame.
  • determining whether the data frame under the preset chip corresponds to the data group transmitted under the IR protocol comprises: obtaining the comparison result from a party that receives the preset data; according to the comparing As a result, it is determined whether the data frame under the preset chip corresponds to the data group transmitted under the IR protocol.
  • determining, according to the comparison result, whether the data frame in the preset chip chip corresponds to the data group transmitted under the IR protocol comprises: if the comparison result is zero, determining the pre- Setting a data frame under the chip to correspond to the data group transmitted under the IR protocol; if the comparison result is not zero, determining the data frame under the preset chip and the information transmitted under the IR protocol The data group does not correspond.
  • the notifying the baseband to perform the time delay adjustment comprises: notifying the baseband to perform delay adjustment according to the comparison result.
  • the embodiment of the present invention further provides a data transmission delay correction apparatus, including: an indication unit, configured to instruct the RRU and the baseband to transmit preset data between the two according to an IR protocol, where the preset number is Determining at least two data sets; determining unit, configured to determine whether a data frame under the preset chip corresponds to the data group transmitted under the IR protocol; and, a notification unit, configured to be in the data frame When the data group does not correspond, the baseband is notified to perform delay adjustment.
  • a data transmission delay correction apparatus including: an indication unit, configured to instruct the RRU and the baseband to transmit preset data between the two according to an IR protocol, where the preset number is Determining at least two data sets; determining unit, configured to determine whether a data frame under the preset chip corresponds to the data group transmitted under the IR protocol; and, a notification unit, configured to be in the data frame When the data group does not correspond, the baseband is notified to perform delay adjustment.
  • the indication unit is configured to: the first indication module is configured to instruct one of the RRU and the baseband to send the preset data; and the second indication module is configured to indicate the RRU And the other one of the basebands receives the preset data and compares the received data set in the preset data with a data frame under the preset chip chip.
  • the second indication module is configured to: instruct the another party to compare the received data in the data group of the preset group number with the data in each chip in the preset chip. a chip number of a chip corresponding to the data in the preset group number; a difference between the chip number and the preset group number is used as a comparison result of the data group and the data frame.
  • the determining unit is configured to: obtain the comparison result from a party that receives the preset data; and determine, according to the comparison result, whether a data frame in a preset chip is transmitted under the IR protocol.
  • the comparison result is zero, determining that the data frame under the preset chip corresponds to the data group transmitted under the IR protocol; if the comparison result is not zero, determining The data frame under the preset chip does not correspond to the data group transmitted under the IR protocol.
  • the notification unit is configured to: notify the baseband to perform delay adjustment according to the comparison result received by the determining unit.
  • the embodiment of the invention further provides a computer readable storage medium storing program instructions, which can be implemented when the program instructions are executed.
  • the method and device for correcting data transmission delay provided by the embodiment of the present invention can instruct the RRU and the baseband to transmit preset data between the two according to the IR protocol, and determine that in the transmission process of the preset data, the preset chip is Whether the data frame corresponds to the data group transmitted under the IR protocol, and if the data frame does not correspond to the data group, notifying the baseband to perform delay adjustment.
  • the data transmission delay between the RRU and the baseband can be determined relatively accurately, and the delay is accurately compensated in units of chips, thereby strictly aligning the data transmission timing in the wireless communication, thereby effectively improving the time. Wireless communication quality.
  • FIG. 1 is a schematic diagram of data transmission between a BBU and an RRU in the related art
  • FIG. 2 is a flowchart of a method for correcting a data transmission delay according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a data encapsulation structure in an IR protocol
  • FIG. 4 is a flowchart of a method for correcting a downlink data transmission delay in an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a downlink structure of a 5 ms wireless subframe and an IR protocol data frame frame format of a TDS according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of an uplink link of a 5 ms wireless subframe and an IR protocol data frame frame format of a TDS according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of test data filling without delay in an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of test data filling in a state where data is late to 2 chip in the embodiment of the present invention.
  • FIG. 9 is a flowchart of a method for correcting an uplink data transmission delay in an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a device for correcting data transmission delay according to an embodiment of the present invention.
  • an embodiment of the present invention provides a method for correcting a data transmission delay, including:
  • the method for correcting data transmission delay provided by the embodiment of the present invention can instruct the RRU and the baseband to transmit preset data between the two according to the IR protocol, and determine the data under the preset chip during the transmission of the preset data. Whether the frame corresponds to the data group transmitted under the IR protocol, and if the data frame does not correspond to the data group, notifying the baseband to perform delay adjustment. In this way, the data transmission delay between the RRU and the baseband can be determined relatively accurately, and the delay is accurately compensated in units of chips, thereby strictly aligning the data transmission timing in the wireless communication, thereby effectively improving the time. Wireless communication quality.
  • the RRU and the baseband module are both located in the NodeB.
  • one of the RRU and the baseband may be instructed to send the preset data, and the other party is instructed to receive the preset data and receive the received data.
  • the data set in the preset data is compared with the data frame in the preset chip.
  • the data transmission has the functions of uplink transmission and downlink transmission.
  • the RRU and the baseband may be instructed to transmit the preset data from the RRU to the baseband according to an IR protocol; the RRU and the baseband may also be indicated, according to IR
  • the protocol transmits the preset data from the baseband to the RRU, which is not limited by the embodiment of the present invention.
  • the preset data when the preset data is transmitted on the optical fiber between the BBU and the RRU, the preset data is implemented by being packed into a series of data groups.
  • the data encapsulation unit includes three levels: a frame, a supper group, and a data group.
  • Each frame duration includes 5 ms
  • each 5 ms frame includes 200 super groups
  • each of the super groups includes 32 of the data groups
  • each of the data groups has a duration equal to one of the preset chips. duration.
  • the duration of a preset chip (1 chip) is 781.25 nanoseconds.
  • the duration of a preset chip (1 chip) is 260.42 nanoseconds.
  • the preset data may be test data having a certain regularity, such as a progressively increasing number of arithmetic progressions.
  • the data in the data group is also increased in equal difference, and the timing relationship of the data group can be easily determined according to the data in the data group.
  • the sender can be responsible for data transmission, and the receiver is not only responsible for data reception, but also needs to receive the data and the chip in the wireless protocol. In comparison, it is determined whether the data transmission is accompanied by a transmission delay and how many chips are transmitted.
  • the comparing the received data group in the preset data with the data frame in the preset chip chip may include the following steps:
  • the difference between the chip number and the preset group number is used as a comparison result of the data group and the data frame.
  • step S12 it can be determined whether the data frame under the preset chip chip corresponds to the data group transmitted under the IR protocol by the following steps:
  • the BBU main control module obtains the comparison result from the party that receives the preset data.
  • the party that receives the data is a baseband (BBU)
  • the party that receives the data is an RRU;
  • the BBU master module determines, according to the comparison result, whether the data frame under the preset chip chip corresponds to the data group transmitted under the IR protocol. Wherein, if the comparison result is zero, determining that the data frame under the preset chip chip corresponds to the data group transmitted under the IR protocol; if the comparison result is not zero, determining The data frame in the preset chip chip does not correspond to the data group transmitted under the IR protocol. That is to say, there is a one-to-one correspondence between the original group and the chip.
  • the data in group0 is the same as the data in chip0
  • the data in group1 is the same as the data in chip1, and so on.
  • the data in the group and the chip are not strictly aligned, and there may be one or more chips. Delay deviation.
  • by transmitting test data in an agreed format it is possible to detect which chip and which group the same test data is located, so that it is possible to determine the delay required to be compensated.
  • the baseband may be notified to delay according to the comparison result. Adjustment. For example, for the uplink data, if the data received by the baseband in chip1 is the data in group0, it means that the data is delayed by one chip, and the baseband can be notified to delay its chip count by one chip, if the baseband is received in chip6399. If the data is the data in group0, it means that the data is advanced by one chip, then the baseband can be notified to advance its chip count by one chip; for the downlink data, if the data received by RRU in chip1 is the data in group0 , it means that the data is delayed by one chip, and the baseband can be notified to send data by one chip in advance. If the data received by the RRU in chip6399 is the data in group0, it means that the data is advanced by one chip, then the baseband can be delayed. 1 chip sends data.
  • the data transmission delay between the baseband and the RRU is firstly calibrated (the method of preliminary calibration may adopt any delay calibration method), and then still exist after the initial calibration.
  • the BBU master module can perform the following controls:
  • Step 1a The BBU main control module sends a downlink IQ delay test command to the RRU.
  • Step 2a After receiving the downlink IQ delay test command, the RRU enters the detection and correction state, and returns a response to the BBU main control module.
  • Step 3a After receiving the response of the RRU to start the downlink delay test command, the BBU is sent to the baseband to send a test data command.
  • Step 4a After receiving the test data command, the baseband enters the sending state, and the data padding can be as shown in FIG. 3;
  • FIG. 3 is a schematic diagram of a grading of a TD data frame of the 1228.8 Mbps Ir protocol, and describes a frame format of a data frame in the IR protocol.
  • a group is the basic unit of a data frame.
  • the Ir protocol is divided into two types: TDS-Ir protocol and LTE-Ir.
  • the LTE protocol carries the TDS data
  • the three LTE groups are combined into one large group to implement, so there is no difference between the upper layer data and the following. According to the frame, the method for implementing the LTE data frame can be known by those skilled in the art.
  • the Group stores IQ data of all antenna carriers on the optical fiber.
  • FIG. 5 and FIG. 6 are respectively a schematic diagram of a downlink structure and an uplink structure of a 5 ms wireless subframe and an IR protocol data frame frame format of the TDS.
  • group 0 of the IR data frame stores the data of chip0
  • group 1 stores the data of chip1
  • group 0 will store data of other chips, such as the delay is too large, resulting in the storage of chip1, 2, 3, or the delay is small to store chip6399, 6398, 6397 and so on.
  • the test data (corresponding to the IQ data) sent by the baseband or the RRU in this embodiment may be regular data, as long as the number of the data group in which the data group is located can be determined according to the data content, the present invention.
  • the embodiment does not limit this.
  • the IQ output of each chip can be replaced with detection data that can be compared.
  • the chip number is used as the detection data, but in other embodiments, other algorithms may be used to generate the detection data. .
  • the Q portion of the data of chip0 is 0, the Q portion of the data of chip1 is 1, the Q portion of the data of chip 2 is 2, and so on.
  • Step 5a After receiving the downlink delay test data transmission command response of the baseband response, the BBU main control module sends a downlink IQ delay test result detection request to the RRU.
  • Step 6a After receiving the downlink IQ delay test result request detection, the RRU determines the deviation of the delay according to the chip data received in the group 0. According to FIG. 8, the data is delayed by two chips and will be detected. The result is sent to the BBU master module.
  • Step 7a After receiving the IQ delay correction result of the RRU response, the BBU main control module performs the following operations:
  • the downlink delay closed loop control process ends.
  • Step 1b The BBU main control module sends an uplink IQ delay test command to the baseband.
  • Step 2b After receiving the uplink IQ delay test command, the baseband enters a detection correction state and responds to the BBU master control module with a success message;
  • Step 3b After receiving the success message of the uplink and downlink delay test command response, the BBU is sent to the RRU to send an uplink test data command.
  • Step 4b The RRU receives the command to start the test data, and the RRU starts the uplink delay test data sending command, and enters the sending state, where the data padding is similar to the padding of the downlink data.
  • Step 5b After receiving the response of the RSU response to start the uplink delay test data sending command, the BBU main control module sends an uplink IQ delay test result request to the baseband.
  • Step 6b After receiving the uplink IQ delay test result request, the baseband starts the uplink delay test command, enters the detection state, and the baseband determines the deviation of the delay according to the chip data received in the group 0. According to FIG. , the data has been delayed by two chips;
  • Step 7b After receiving the IQ delay correction result of the baseband response, the BBU main control module performs the following operations:
  • the uplink delay adjustment command is sent to the baseband (or may also be sent together with the downlink delay adjustment command);
  • the uplink delay closed loop control process ends.
  • the delay is accurately compensated by the dynamic monitoring IQ delay, and the whole calibration process forms a closed loop, which greatly improves the correction accuracy of the data transmission delay and effectively improves the communication quality. .
  • an embodiment of the present invention further provides a data transmission delay correction apparatus, including:
  • the indicating unit 20 is configured to instruct the RRU and the baseband to transmit preset data between the two according to the IR protocol, where the preset data includes at least two data groups;
  • the determining unit 22 is configured to determine whether the data frame under the preset chip chip is related to the IR protocol Corresponding to the data set transmitted below;
  • the notification unit 24 is configured to notify the baseband to perform delay adjustment if the data frame does not correspond to the data group.
  • the indication unit 20 can instruct the RRU and the baseband to transmit preset data between the two according to the IR protocol
  • the determining unit 22 can determine that during the transmission of the preset data, Whether the data frame under the preset chip corresponds to the data group transmitted under the IR protocol, and the notification unit 24 can notify the baseband to delay if the data frame does not correspond to the data group. Adjustment.
  • the data transmission delay between the RRU and the baseband can be determined relatively accurately, and the delay is accurately compensated in units of chips, thereby strictly aligning the data transmission timing in the wireless communication, thereby effectively improving the time. Wireless communication quality.
  • the indicating unit 20 may include:
  • a first indication module configured to instruct one of the RRU and the baseband to send the preset data
  • a second indication module configured to instruct the other one of the RRU and the baseband to receive the preset data and compare the received data set in the preset data with a data frame in a preset chip chip .
  • the second indication module is configured to: instruct the other party to include the data group received by any one of the preset chip chips and the preset data Comparing the data groups, determining the corresponding group number of the received data group in the data group, and using the difference between the group number and the slice number of any one of the chips as the data group and the data The comparison result of the frame.
  • the determining unit 22 is configured to:
  • the notification unit 24 is configured to notify the baseband to perform delay adjustment according to the comparison result received by the determining unit.
  • the method and device for correcting data transmission delay provided by the embodiment of the present invention can instruct the RRU and the baseband to transmit preset data between the two according to the IR protocol, and determine that in the transmission process of the preset data, the preset chip is Whether the data frame corresponds to the data group transmitted under the IR protocol, and if the data frame does not correspond to the data group, notifying the baseband to perform delay adjustment.
  • the data transmission delay between the RRU and the baseband can be determined relatively accurately, and the delay is accurately compensated in units of chips, thereby strictly aligning the data transmission timing in the wireless communication, thereby effectively improving the time. Wireless communication quality.

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Abstract

一种数据传输时延的校正方法及装置，所述方法包括：指示RRU和基带根据IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应；在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。

Description

一种数据传输时延的校正方法及装置 技术领域
本文涉及通信技术领域，尤其涉及一种数据传输时延的校正方法及装置。
背景技术
TD-SCDMA(Time Division Synchronous Code Division Multiple Access，时分同步码分多址)系统作为第三代移动通信系统，有严格的时间对准要求，稍有偏差会带来KPI(Key Performance Indicator，关键绩效指标)的下降。
TD-SCDMA NodeB(节点B，又称为基站)从RNC(Radio Network Controller，无线网络控制器)侧接收到媒体面数据，并将该媒体数据转换为IQ(in-phase quadature，同相正交)数据，经过一定的路径从空口发送。
如图1所示，NodeB的BBU(Building Base band Unite，室内基带单元)一般包括基带模块和数据交换模块，由数据交换模块发出的数据可以转换为光信号，通过光纤传输至RRU(Radio Remote Unit，射频拉远单元)，再由RRU将光纤数据重新组帧后发送至空口，而上行数据由空口沿相反的路径传输至基带。数据在BBU的多个模块中传输时会产生不同程度的同相正交数据时延(即IQ时延)，从而导致在光纤中传输的数据组与空口协议的数据帧产生时序错位，从而影响正常的通讯。
为解决上述问题，通常的做法是把不同类型单板，不同协议，不同槽位的时延值进行预先测量，记录下时延值，然后在基带资源分配完毕后，根据传输路径对每个时延值进行补偿。然而，由于预先测量出的时延值是按照纳秒来计算，而延时补偿是按照TD-SCDMA的chip(码片)来进行的，1个chip等于781.25纳秒。这样由于测试带来的误差、硬件实际上的不同，以及纳秒转变为chip的四舍五入，最终导致补偿后仍然存在一定程度的时延误差，从而使通信质量的下降。
发明内容
本发明实施例提供一种数据传输时延的校正方法及装置，用以解决相关技术中IQ数据传输时延难以精确校准，通信质量低的问题。
本发明实施例提供一种数据传输时延的校正方法，包括：指示RRU和基带根据IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应；在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
可选的，所述指示RRU和基带根据IR协议在二者之间传输预设数据包括：指示所述RRU和所述基带中的一方发送所述预设数据，指示另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设chip下的数据帧相比较。
可选的，所述将接收的所述预设数据中的数据组与预设chip下的数据帧相比较包括：通过将预设组号的数据组中的接收数据，与预设chip中的每个码片中的数据相比较，确定与所述预设组号中的数据相对应的码片的码片号；将所述码片号与所述预设组号的差作为所述数据组与所述数据帧的比较结果。
可选的，所述确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应包括：从接收所述预设数据的一方获取所述比较结果；根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应。
可选的，所述根据所述比较结果确定预设码片chip下的数据帧是否与所述IR协议下传输的所述数据组相对应包括：如果所述比较结果为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组相对应；如果所述比较结果不为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组不对应。
可选的，所述通知所述基带进行时延调整包括：通知所述基带根据所述比较结果进行时延调整。
本发明实施例还提供一种数据传输时延的校正装置，包括：指示单元，设置为指示RRU和基带根据IR协议在二者之间传输预设数据，所述预设数 据包括至少2个数据组；确定单元，设置为确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应；以及，通知单元，设置为在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
可选的，所述指示单元是设置为：第一指示模块，设置为指示所述RRU和所述基带中的一方发送所述预设数据；以及，第二指示模块，设置为指示所述RRU和所述基带中的另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设码片chip下的数据帧相比较。
可选的，所述第二指示模块是设置为：指示所述另一方通过将预设组号的数据组中的接收数据，与预设chip中的每个码片中的数据相比较，确定与所述预设组号中的数据相对应的码片的码片号；将所述码片号与所述预设组号的差作为所述数据组与所述数据帧的比较结果。
可选的，所述确定单元是设置为：从接收所述预设数据的一方获取所述比较结果；根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应：如果所述比较结果为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组相对应；如果所述比较结果不为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组不对应。
可选的，所述通知单元是设置为：通知所述基带根据所述确定单元接收的比较结果进行时延调整。
本发明实施例还提供一种计算机可读存储介质，存储有程序指令，当该程序指令被执行时可实现上述方法。
本发明实施例提供的数据传输时延的校正方法及装置，能够指示RRU和基带根据IR协议在二者之间传输预设数据，并确定出在预设数据的传输过程中，预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应，在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。这样就能够比较精确地确定出RRU和基带之间的数据传输时延，并以chip为时间单位对该时延进行准确的补偿，从而使无线通讯中的数据传输时序严格对准，有效提高了无线通信质量。
附图概述
图1是相关技术中BBU与RRU之间的数据传输示意图；
图2是本发明实施例提供的数据传输时延的校正方法的一种流程图；
图3是IR协议中的数据封装结构示意图；
图4是本发明实施例中下行方向数据传输时延的校正方法的一种流程图；
图5是本发明实施例中TDS的5ms无线子帧和IR协议数据帧帧格式的下行链路结构示意图；
图6是本发明实施例中TDS的5ms无线子帧和IR协议数据帧帧格式的上行行链路结构示意图；
图7是本发明实施例中无时延状态下测试数据填充的一种结构示意图；
图8是本发明实施例中数据迟到2chip的状态下测试数据填充的一种结构示意图；
图9是本发明实施例中上行方向数据传输时延的校正方法的一种流程图；
图10是本发明实施例提供的数据传输时延的校正装置的一种结构示意图。
本发明的实施方式
以下结合附图对本发明实施例进行详细说明。
如图2所示，本发明实施例提供一种数据传输时延的校正方法，包括：
S11，指示RRU和基带根据IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；
S12，确定预设码片chip下的数据帧是否与所述IR协议下传输的所述数据组相对应；
S13，在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
本发明实施例提供的数据传输时延的校正方法，能够指示RRU和基带根据IR协议在二者之间传输预设数据，并确定出在预设数据的传输过程中，预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应，在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。这样就能够比较精确地确定出RRU和基带之间的数据传输时延，并以chip为时间单位对该时延进行准确的补偿，从而使无线通讯中的数据传输时序严格对准，有效提高了无线通信质量。
其中，RRU和基带模块均位于NodeB中，在步骤S11中，可以指示所述RRU和所述基带中的一方发送所述预设数据，指示另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设码片chip下的数据帧相比较。
需要说明的是，由于NodeB既能进行数据发射，也能进行数据接收，其数据传输有上行传输与下行传输之分。相应的，在步骤S11中，可以指示所述RRU和所述基带，根据IR协议从所述RRU向所述基带上行传输所述预设数据；也可以指示所述RRU和所述基带，根据IR协议从所述基带向所述RRU下行传输所述预设数据，本发明实施例对此不做限制。
根据IR协议可知，当预设数据在BBU与RRU之间的光纤上传输时，该预设数据是被打包成一系列的数据组(group)来实现的。如图3所示，在IR协议中，数据封装单位包括帧(frame)、超级组(supper group)和数据组三个层次。其中，每个帧时长为5ms，每个5ms帧包括200个超级组，每个所述超级组包括32个所述数据组，每个所述数据组的时长等于一个所述预设码片的时长。可选的，对于TDS-IR协议来说，一个预设码片的时长(1个chip)为781.25纳秒，对于LTE-IR协议来说，一个预设码片的时长(1个chip)为260.42纳秒。
其中，所述预设数据可以为具有一定规律的测试性数据，例如逐渐递增的等差数列。这样，当该预设数据被打包成数据组在光纤中传输时，数据组中的数据也是等差递增的，根据数据组中的数据很容易可以确定出数据组的时序关系。
在预设数据的发送、接收和检测的过程中，发送方可以负责数据发送，而接收方不仅要负责数据接收，还需要将接收到的数据与无线协议中的chip 相比较，从而确定数据传输是否伴有传输时延以及传输时延为多少chip。
其中，将接收的所述预设数据中的数据组与预设码片chip下的数据帧相比较可包括如下步骤：
通过将预设组号的数据组中的接收数据，与预设码片chip中的每个码片中的数据相比较，确定与所述预设组号中的数据相对应的码片的码片号；
将所述码片号与所述预设组号的差作为所述数据组与所述数据帧的比较结果。
例如，在一个实施例中，接收数据的一方将接收到的组号为0的数据组group 0中的数据与预设码片中的每个码片中的数据比较，发现group 0中的数据与chip1中的数据相同，也就是说接收方在chip1时段才接收到group0的数据，则，数据组与数据帧的比较结果就是1-0＝1。
那么，在步骤S12中，就可以通过以下步骤确定预设码片chip下的数据帧是否与所述IR协议下传输的所述数据组相对应：
BBU主控模块从接收所述预设数据的一方获取所述比较结果；可选的，对于上行方向，接收数据的一方为基带(BBU)，对于下行方向，接收数据的一方为RRU；
BBU主控模块根据所述比较结果确定预设码片chip下的数据帧是否与所述IR协议下传输的所述数据组相对应。其中，如果所述比较结果为零，则确定所述预设码片chip下的数据帧与所述IR协议下传输的所述数据组相对应；如果所述比较结果不为零，则确定所述预设码片chip下的数据帧与所述IR协议下传输的所述数据组不对应。也就是说，原本group与chip之间存在着一一对应的关系，group0中的数据与chip0中的数据相同，group1中的数据与chip1中的数据相同，以此类推。但是，由于数据在BBU中传输所产生的时延，以及采用传统的时延补偿方法所带来的时延，使得group与chip中的数据并没有严格对齐，还可能存在一个或多个chip的时延偏差。本实施例通过发送约定格式的测试数据，能够检测出同样的测试数据分别位于哪个chip和哪个group，从而可以确定出需要补偿的时延是多少。
在步骤S13中，可选的，可以通知所述基带根据所述比较结果进行时延 调整。例如，对于上行数据，如果基带在chip1中接收到的数据为group0中的数据，则说明数据延后了1个chip，可以通知基带将自身的chip计数推迟1个chip，如果基带在chip6399中接收到的数据为group0中的数据，则说明数据提前了1个chip，则可以通知基带将自身的chip计数提前1个chip；对于下行数据，如果RRU在chip1中接收到的数据为group0中的数据，则说明数据延后了1个chip，可以通知基带提前1个chip发送数据，如果RRU在chip6399中接收到的数据为group0中的数据，则说明数据提前了1个chip，则可以通知基带推迟1个chip发送数据。
下面通过实施例来对上述数据传输时延的校正方法进行详细说明。在一个实施例中，小区建立完成之后，首先对基带与RRU之间的数据传输时延进行初步校准(初步校准的方法可采用任意一种时延校准方法)，然后对于初步校准后仍然存在的时延误差，BBU主控模块可执行以下控制：
如图4所示，对于下行数据：
步骤1a、BBU主控模块对RRU下发启动下行IQ时延测试命令；
步骤2a、RRU收到启动下行IQ时延测试命令后，进入检测校正状态，向BBU主控模块回响应成功；
步骤3a、BBU主控模块收到RRU启动下行时延测试命令响应成功后，给基带下发启动下发测试数据命令；
步骤4a、基带收到启动下发测试数据命令后，进入发送状态，数据填充可如图3所示；
其中，图3是1228.8Mbps Ir协议TD数据帧分级示意图，描述了IR协议中数据帧的帧格式。组(Group)是数据帧的基本单元。Ir协议分成TDS-Ir协议和LTE-Ir两种，其数据帧传输速率不同，TDS-Ir速率是1.28MHz，所以TDS-Ir协议Group长度为Tc＝1/1.28MHz＝781.25ns，也就是1个TDS无线帧下chip的时间长度。而LTE-Ir速率是3.84MHz，所以LTE-Ir协议Group长度为Tc＝1/3.84MHz＝260.42ns，也就是1个LTE无线帧下chip的时间长度。这样LTE-Ir中Group长度更小，LTE协议承载TDS数据时，3个LTEgroup凑成一个大group来实现，所以对上层数据来说并没有区别，以下以TDS数 据帧来说明，本领域技术人员可以据此获知LTE数据帧的实现方法。
本实施例中，Group中存放的是该光纤上所有天线载波的IQ数据。可选的，可以根据需要选择是否对每个载波的每个天线都进行时延检测控制，还是只对载波下的一个天线进行检测，本发明实施例对此不做限定。
图5和图6分别为TDS的5ms无线子帧和IR协议数据帧帧格式的下行链路结构示意图及上行链路结构示意图。
在时延正确校准的情况下，IR数据帧的组0，存放的是chip0的数据，组1存放的是chip1的数据，以此类推。而在发生偏差的时候，组0会存放其他chip的数据，比如时延偏大导致存放了chip1,2,3,或者时延偏小存放了chip6399,6398,6397等等。
如图7所示，本实施例中基带或RRU发送的测试数据(对应于IQ数据)，可以是具有规律的数据，只要能够根据数据内容确定出其所在的数据组的编号即可，本发明实施例对此不作限定。可选的，可以把每个chip的IQ输出换成可以进行比较的检测数据，如本实施例中是将chip号作为检测数据，但在其他实施例中，也可以采用其他算法来生成检测数据。例如chip0的数据的Q部是0，chip1的数据的Q部是1，chip2的数据的Q部是2，以此类推。
步骤5a、BBU主控模块收到基带回应的启动下行时延测试数据发送命令响应后，给RRU下发下行IQ时延测试结果检测请求；
步骤6a、RRU收到下行IQ时延测试结果请求检测后，根据在组0中收到的chip数据，来判断时延发生的偏差，根据图8可知，数据延后了两个chip，将检测结果发给BBU主控模块。
步骤7a、BBU主控模块收到RRU回应的IQ时延校正结果后，执行以下操作：
给基带下发下行IQ测试数据发送停止命令；
给RRU下发下行IQ测试数据检测停止命令；
给基带下发时延调整命令(可以选择此时不发调整命令，和上行一起发)；
本次下行时延闭环控制流程结束。
如图9所示，对于上行数据：
步骤1b、BBU主控模块对基带下发启动上行IQ时延测试命令；
步骤2b、基带收到启动上行IQ时延测试命令后，进入检测校正状态，向BBU主控模块响应成功消息；
步骤3b、BBU主控模块收到基带启动上下行时延测试命令响应成功消息后，给RRU下发启动上行测试数据命令；
步骤4b、RRU收到启动上发测试数据命令，RRU启动上行时延测试数据发送命令，进入发送状态，数据填充类似于下行数据的填充；
步骤5b、BBU主控模块收到RRU回应的启动上行时延测试数据发送命令响应后，给基带下发上行IQ时延测试结果请求；
步骤6b、基带收到上行IQ时延测试结果请求后，启动上行时延测试命令，进入检测状态，基带根据在组0中收到的chip数据，来判断时延发生的偏差，根据图8可知，数据延后了两个chip；
步骤7b、BBU主控模块收到基带回应的IQ时延校正结果后，执行以下操作：
给RRU下发上行IQ测试数据发送停止命令；
给基带下发上行IQ测试数据检测停止命令；
给基带下发上行时延调整命令(或者也可以和下行时延调整命令一起发送)；
本次上行时延闭环控制流程结束。
本发明实施例在相关技术的校正方法之后又通过动态监测IQ时延对时延进行了精确补偿，整个校正过程形成闭环，大大提高了对数据传输时延的校正准确性，有效提高了通信质量。
相应的，如图10所示，本发明实施例还提供一种数据传输时延的校正装置，包括：
指示单元20，设置为指示RRU和基带根据IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；
确定单元22，设置为确定预设码片chip下的数据帧是否与所述IR协议 下传输的所述数据组相对应；以及
通知单元24，设置为在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
本发明实施例提供的数据传输时延的校正装置，指示单元20能够指示RRU和基带根据IR协议在二者之间传输预设数据，确定单元22能够确定出在预设数据的传输过程中，预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应，通知单元24能够在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。这样就能够比较精确地确定出RRU和基带之间的数据传输时延，并以chip为时间单位对该时延进行准确的补偿，从而使无线通讯中的数据传输时序严格对准，有效提高了无线通信质量。
可选的，指示单元20可包括：
第一指示模块，设置为指示所述RRU和所述基带中的一方发送所述预设数据；以及
第二指示模块，设置为指示所述RRU和所述基带中的另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设码片chip下的数据帧相比较。
可选的，所述第二指示模块是设置为：指示所述另一方通过将所述预设码片chip中任一码片下接收到的所述数据组与所述预设数据包括的每个数据组相比较，确定接收到的所述数据组在数据组中对应的组编号，并将所述组编号与所述任一码片的片编号的差作为所述数据组与所述数据帧的比较结果。
可选的，确定单元22是设置为：
从接收所述预设数据的一方获取所述比较结果；
根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应：
如果所述比较结果为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组相对应；
如果所述比较结果不为零，确定所述预设chip下的数据帧与所述IR协议 下传输的所述数据组不对应；
所述通知单元24是设置为：通知所述基带根据所述确定单元接收的比较结果进行时延调整。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件完成，上述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现。相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本发明实施例不限制于任何特定形式的硬件和软件的结合。
工业实用性
本发明实施例提供的数据传输时延的校正方法及装置，能够指示RRU和基带根据IR协议在二者之间传输预设数据，并确定出在预设数据的传输过程中，预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应，在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。这样就能够比较精确地确定出RRU和基带之间的数据传输时延，并以chip为时间单位对该时延进行准确的补偿，从而使无线通讯中的数据传输时序严格对准，有效提高了无线通信质量。

Claims (12)

  1. 一种数据传输时延的校正方法，包括：
    指示射频拉远单元RRU和基带根据红外IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；
    确定预设码片chip下的数据帧是否与所述IR协议下传输的所述数据组相对应；
    在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
  2. 根据权利要求1所述的方法，其中，所述指示RRU和基带根据IR协议在二者之间传输预设数据包括：
    指示所述RRU和所述基带中的一方发送所述预设数据，指示另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设chip下的数据帧相比较。
  3. 根据权利要求2所述的方法，其中，所述将接收的所述预设数据中的数据组与预设chip下的数据帧相比较包括：
    通过将预设组号的数据组中的接收数据，与预设chip中的每个码片中的数据相比较，确定与所述预设组号中的数据相对应的码片的码片号；
    将所述码片号与所述预设组号的差作为所述数据组与所述数据帧的比较结果。
  4. 根据权利要求3所述的方法，其中，所述确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应包括：
    从接收所述预设数据的一方获取所述比较结果；
    根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应。
  5. 根据权利要求4所述的方法，其中，所述根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应包括：
    如果所述比较结果为零，确定所述预设chip下的数据帧与所述IR协议下 传输的所述数据组相对应；
    如果所述比较结果不为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组不对应。
  6. 根据权利要求4或5所述的方法，其中，所述通知所述基带进行时延调整包括：
    通知所述基带根据所述比较结果进行时延调整。
  7. 一种数据传输时延的校正装置，包括：
    指示单元，设置为指示射频拉远单元RRU和基带根据红外IR协议在二者之间传输预设数据，所述预设数据包括至少2个数据组；
    确定单元，设置为确定预设码片chip下的数据帧是否与所述红外IR协议下传输的所述数据组相对应；以及
    通知单元，设置为在所述数据帧与所述数据组不对应的情况下，通知所述基带进行时延调整。
  8. 根据权利要求7所述的装置，其中，所述指示单元包括：
    第一指示模块，设置为指示所述RRU和所述基带中的一方发送所述预设数据；以及
    第二指示模块，设置为指示所述RRU和所述基带中的另一方接收所述预设数据并将接收的所述预设数据中的数据组与预设chip下的数据帧相比较。
  9. 根据权利要求8所述的装置，其中，所述第二指示模块是设置为：
    指示所述另一方通过将预设组号的数据组中的接收数据，与预设chip中的每个码片中的数据相比较，确定与所述预设组号中的数据相对应的码片的码片号；将所述码片号与所述预设组号的差作为所述数据组与所述数据帧的比较结果。
  10. 根据权利要求9所述的装置，其中，所述确定单元是设置为：
    从接收所述预设数据的一方获取所述比较结果；
    根据所述比较结果确定预设chip下的数据帧是否与所述IR协议下传输的所述数据组相对应：
    如果所述比较结果为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组相对应；
    如果所述比较结果不为零，确定所述预设chip下的数据帧与所述IR协议下传输的所述数据组不对应。
  11. 根据权利要求10所述的装置，其中，所述通知单元是设置为：通知所述基带根据所述确定单元接收的比较结果进行时延调整。
  12. 一种计算机可读存储介质，存储有程序指令，当该程序指令被执行时可实现权利要求1-6任一项所述的方法。
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