WO2015018354A1

WO2015018354A1 - Antenna calibrating method and device

Info

Publication number: WO2015018354A1
Application number: PCT/CN2014/083919
Authority: WO
Inventors: 林碧影
Original assignee: 大唐移动通信设备有限公司
Priority date: 2013-08-08
Filing date: 2014-08-07
Publication date: 2015-02-12
Also published as: CN103442441A

Abstract

The present invention relates to the field of wireless communications. Disclosed in an embodiment of the present invention are an antenna calibrating method and device for simplifying the process and improving the accuracy of antenna calibration. In the solution provided by the embodiment of the present invention, a baseband unit (BBU) generates calibration control information and a calibration sequence, and transmits the calibration control information and the calibration sequence to a remote radio frequency unit (RRU) via downlink subframes; after receiving the calibration control information and the calibration sequence in the downlink subframes, the RRU determines, according to the calibration control information, whether to conduct transmission calibration or reception calibration, then conducts corresponding antenna calibration according to the determination result, and transmits the obtained calibration data to the BBU via an uplink subframe; and the BBU acquires a calibration factor according to the received calibration data, and conducts calibration on uplink and downlink signals according to the calibration factor. The solution simplifies the process and improves the accuracy of antenna calibration.

Description

天线校准方法和设备本申请要求在 2013年 8月 08日提交中国专利局、申请号为 201310344520.X、发明名称为 Antenna calibration method and equipment This application is submitted to the Chinese Patent Office on August 08, 2013, and the application number is 201310344520.X. The invention name is

"天线校准方法和设备"的中国专利申请的优先权，其全部内容通过引用结合在本申请中。技术领域本申请涉及无线通信领域，尤其涉及一种天线校准方法和设备。背景技术天线校准（ Antenna Calibration, AC )是时分同步码分多址长期演进（ TD-SCDMALong Term Evolution TD-LTE ) ***生产测试及商用过程中重要的测试项目及操作流程。总的说来，通过收发测试数据，调整发送和接收数据，以保证各路发送射频通道频域幅相的一致性。 The priority of the Chinese Patent Application for "Antenna Calibration Method and Apparatus" is hereby incorporated by reference in its entirety. TECHNICAL FIELD The present application relates to the field of wireless communications, and in particular, to an antenna calibration method and apparatus. BACKGROUND OF THE INVENTION Antenna Calibration (AC) is an important test item and operation process in the production test and commercial process of the TD-SCDMA Long Term Evolution (TD-LTE) system. In general, by transmitting and receiving test data, the transmit and receive data are adjusted to ensure the consistency of the frequency domain amplitude and phase of each channel.

AC 又称为周期校准，包括发校准和收校准；发校准是指工作天线发校准数据，校准天线将数据收回；收校准是指校准天线发校准数据，工作天线将数据收回。收发校准的过程如图 1所示。 AC is also called periodic calibration, including calibration and calibration. The calibration is the calibration data of the working antenna, and the calibration antenna recovers the data. The calibration refers to the calibration data sent by the calibration antenna, and the working antenna recovers the data. The process of sending and receiving calibration is shown in Figure 1.

AC的已有的实现方案主要有下面两种： There are two main implementations of AC:

第一种：基带信号处理器通过发送射频通道发送校准序列，校准序列经接收耦合网络到达校准通道，校准信号处理器通过校准通道接收校准序列；校准信号处理器根据接收耦合网络精度判断是否需要补偿耦合网络误差，通过接收的校准序列计算校准系数，并发送给基带信号处理器；基带信号处理器在信号发射过程中根据校准系数进行系数补偿，使得发送射频通道的幅度相位一致。 The first type: The baseband signal processor sends a calibration sequence by transmitting a radio frequency channel, and the calibration sequence reaches the calibration channel via the receiving coupling network, and the calibration signal processor receives the calibration sequence through the calibration channel; the calibration signal processor determines whether compensation is needed according to the accuracy of the receiving coupling network. The network error is coupled, and the calibration coefficient is calculated by the received calibration sequence and sent to the baseband signal processor. The baseband signal processor performs coefficient compensation according to the calibration coefficient during signal transmission, so that the amplitude phase of the transmitting RF channel is consistent.

第二种：基站的校准信号处理模块利用可用时频资源产生校准序列；校准序列通过基站的射频收发模块和校准射频收发模块后返回校准信号处理模块；根据返回的校准序列获取校准系数并根据校准系数进行校准调整。 The second type: the calibration signal processing module of the base station generates the calibration sequence by using the available time-frequency resources; the calibration sequence returns to the calibration signal processing module after passing through the RF transceiver module of the base station and the calibration RF transceiver module; obtaining the calibration coefficient according to the returned calibration sequence and according to the calibration The coefficients are adjusted for calibration.

在 AC中，需要参与 AC处理的各子***分别在正确的时刻点获取到校准控制信息才能保证校准序列从发送到收回的正确性。 In the AC, each subsystem that needs to participate in the AC processing obtains the calibration control information at the correct point in time to ensure the correctness of the calibration sequence from transmission to retraction.

上述两种方案中并未描述校准控制信息的传递和使用方式，仅描述了校准序列的传递方式。因此，无法保证校准序列从发送到收回的正确性。 The transfer and use of calibration control information is not described in either of the above two scenarios, and only the manner in which the calibration sequence is delivered is described. Therefore, the correctness of the calibration sequence from transmission to retraction cannot be guaranteed.

另外，上述两种方案中涉及到多个子***之间的交互和配合，增加了联调的难度，在实际应用中出现问题的概率较大。比如，由于各子***的中断处理或进程交互异常，处理时延变化等因素影响校准控制信息（筒称 AC控制字）按预期时间点的下发，导致 AC控制字和校准序列在传输中的位置关系不正常，最终影响开关的控制和正确校准数据的回收等，在实际应用中 AC出现了大量问题。发明内容本申请实施例提供一种天线校准方法和设备，用于筒化天线校准的实现流程并提高天线校准的准确度。 In addition, the above two schemes involve interaction and cooperation between multiple subsystems, which increases the difficulty of joint debugging, and has a high probability of occurrence of problems in practical applications. For example, due to interrupt processing or process interaction abnormality of each subsystem, factors such as processing delay variation affect the calibration control information (the cylinder is called AC control word), which is delivered at the expected time point, resulting in AC control. The positional relationship between the word and calibration sequences in transmission is not normal, which ultimately affects the control of the switch and the recovery of the correct calibration data. In practice, AC has a lot of problems. SUMMARY OF THE INVENTION Embodiments of the present application provide an antenna calibration method and apparatus for implementing an implementation process of a cylindrical antenna calibration and improving accuracy of antenna calibration.

一种天线校准方法，该方法包括： An antenna calibration method, the method comprising:

基站的基带单元（BBU )在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将所述校准控制信息和校准序列发送给该基站的远端射频单元（RRU ); 其中位置关系； The baseband unit (BBU) of the base station generates calibration control information and a calibration sequence when performing antenna calibration, and transmits the calibration control information and the calibration sequence to the remote radio unit (RRU) of the base station through the downlink subframe; Relationship

RRU在下行子帧上接收到所述校准控制信息和校准序列后，根据所述校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU; After receiving the calibration control information and the calibration sequence on the downlink subframe, the RRU determines whether to perform the calibration or the calibration according to the calibration control information, performs corresponding antenna calibration according to the determination result, and passes the obtained calibration data through the uplink. The subframe is sent to the BBU;

BBU根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。 The BBU obtains the calibration coefficient based on the received calibration data, and calibrates the uplink and downlink signals according to the calibration coefficient.

一种基站，该基站包括： A base station, the base station comprising:

BBU, 用于在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将所述校准控制信息和校准序列发送给该基站的 RRU;其中发送所述校准控制信息使用的下行子帧与发送所述校准序列使用的下行子帧具有预设的位置关系；以及，根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整； a BBU, configured to generate calibration control information and a calibration sequence when the antenna calibration needs to be performed, send the calibration control information and the calibration sequence to the RRU of the base station by using a downlink subframe; and send the downlink control used by the calibration control information The frame has a preset positional relationship with the downlink subframe used for sending the calibration sequence; and, according to the received calibration data, a calibration coefficient is obtained, and the uplink and downlink signals are calibrated and adjusted according to the calibration coefficient;

RRU, 用于在下行子帧上接收到所述校准控制信息和校准序列后，根据所述校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU。 The RRU is configured to, after receiving the calibration control information and the calibration sequence on the downlink subframe, determine whether to perform calibration or receive calibration according to the calibration control information, perform corresponding antenna calibration according to the determination result, and obtain a calibration Data is sent to the BBU through the uplink subframe.

本申请实施例提供的方案中，基站的 BBU在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将校准控制信息和校准序列发送给该基站的 RRU; 其中发送在下行子帧上接收到校准控制信息和校准序列后，根据校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU; BBU根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。本方案中，校准控制信息和校准序列在组帧时和正常数据一起组入无线帧，通过正常数据通道进行传输，传输通道单一，因此减少了天线校准流程中模块间的交互，从而筒化了天线校准的实现流程；并且，本方案中， BBU将校准控制信息和校准序列均通过下行子帧传递给 RRU, 也即校准控制信息和校准序列复用 BBU和 RRU间的数据通道传输，发送校准控制信息使用的下行子帧与发送校准序列使用的下行子帧之间具有预设的位置关系，校准控制信息和校准序列可以在正确的时刻传递给 RRU, 从而保证了 RRU的正确操作以保证校准序列的发送和回收的正确性，进而提高了天线校准的准确性。附图说明图 1为现有技术中的天线校准示意图； In the solution provided by the embodiment of the present application, when the BBU of the base station needs to perform antenna calibration, the calibration control information and the calibration sequence are generated, and the calibration control information and the calibration sequence are sent to the RRU of the base station by using the downlink subframe; After receiving the calibration control information and the calibration sequence on the frame, determining whether to perform the calibration or the calibration according to the calibration control information, performing the corresponding antenna calibration according to the determination result, and transmitting the obtained calibration data to the BBU through the uplink subframe; The received calibration data obtains a calibration coefficient, and the upstream and downstream signals are calibrated and adjusted according to the calibration coefficient. In this solution, the calibration control information and the calibration sequence are grouped into the radio frame together with the normal data during the framing, and are transmitted through the normal data channel, and the transmission channel is single, thereby reducing the interaction between the modules in the antenna calibration process, thereby The implementation process of the antenna calibration is completed; and, in this solution, the BBU transmits the calibration control information and the calibration sequence to the RRU through the downlink subframe, that is, the calibration control information and the calibration sequence multiplex the data channel transmission between the BBU and the RRU. The downlink subframe used for sending the calibration control information and the downlink subframe used for sending the calibration sequence have a preset positional relationship, and the calibration control information and the calibration sequence can be transmitted to the RRU at the correct time, thereby ensuring correct operation of the RRU. In order to ensure the correctness of the transmission and recovery of the calibration sequence, the accuracy of the antenna calibration is improved. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of antenna calibration in the prior art;

图 2为本申请实施例提供的方法流程示意图； 2 is a schematic flowchart of a method provided by an embodiment of the present application;

图 3A为本申请实施例中的模块结构示意图； 3A is a schematic structural diagram of a module in an embodiment of the present application;

图 3B为本申请实施例中的 AC控制字和校准序列位置示意图； FIG. 3B is a schematic diagram showing the position of an AC control word and a calibration sequence in the embodiment of the present application; FIG.

图 4为本申请实施例提供的基站结构示意图。具体实施方式为了筒化天线校准的实现流程并提高天线校准的准确度，本申请实施例提供一种天线校准方法。 FIG. 4 is a schematic structural diagram of a base station according to an embodiment of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to streamline the implementation of antenna calibration and improve the accuracy of antenna calibration, embodiments of the present application provide an antenna calibration method.

参见图 2, 本申请实施例提供的天线校准方法，包括以下步骤： Referring to FIG. 2, an antenna calibration method provided by an embodiment of the present application includes the following steps:

步骤 20: 基站的 BBU在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将生成的校准控制信息和校准序列发送给该基站的 RRU;其中发送校准控制信息这里，校准控制信息是指示是否执行天线校准、以及在执行天线校准时所执行的校准类型的信息，可以自行定义校准控制信息数值代表的含义； Step 20: The BBU of the base station generates calibration control information and a calibration sequence when performing antenna calibration, and sends the generated calibration control information and the calibration sequence to the RRU of the base station through the downlink subframe; wherein the calibration control information is sent, where the calibration control is performed. The information is information indicating whether to perform antenna calibration and the type of calibration performed when performing antenna calibration, and the meaning of the value of the calibration control information can be defined by itself;

步骤 21： RRU在下行子帧上接收到 BBU发来的校准控制信息和校准序列后，根据校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU; Step 21: After receiving the calibration control information and the calibration sequence sent by the BBU on the downlink subframe, the RRU determines whether to perform the calibration or the calibration according to the calibration control information, and performs the corresponding antenna calibration according to the determination result, and the obtained calibration is performed. The data is sent to the BBU through the uplink subframe.

步骤 22: BBU根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。 Step 22: The BBU obtains the calibration coefficient according to the received calibration data, and performs calibration adjustment on the uplink and downlink signals according to the calibration coefficient.

进一步的， BBU在不需要执行天线校准时，也生成校准控制信息，通过下行子帧将生成的校准控制信息发送给 RRU; RRU在下行子帧上接收到校准控制信息后，根据接收到的校准控制信息确定不需要执行天线校准。 Further, when the BBU does not need to perform antenna calibration, the BBU also generates calibration control information, and sends the generated calibration control information to the RRU through the downlink subframe; after receiving the calibration control information in the downlink subframe, the RRU receives the calibration according to the received calibration. The control information determines that antenna calibration does not need to be performed.

这里，校准控制信息可以是每一无线帧都携带， RRU对每一无线帧都根据该无线帧中携带的校准控制信息判定是否需要执行天线校准以及在需要执行天线校准时是执行发校准或是收校准。 Here, the calibration control information may be carried in each radio frame, and the RRU determines whether it is necessary to perform antenna calibration according to the calibration control information carried in the radio frame for each radio frame and performs the calibration when the antenna calibration needs to be performed. Quasi or to receive calibration.

具体的，步骤 21 中按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU, 具体实现可以如下： Specifically, in step 21, the corresponding antenna calibration is performed according to the determined result, and the obtained calibration data is sent to the BBU in an uplink subframe, and the specific implementation may be as follows:

在根据校准控制信息确定执行发校准后，通过工作天线发送校准序列，通过校准天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU; 在根据校准控制信息确定执行收校准后，通过校准天线发送校准序列，通过工作天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU。 After determining to perform the calibration according to the calibration control information, the calibration sequence is sent through the working antenna, and the calibration sequence received by the calibration antenna is received, and the received calibration sequence is sent as calibration data to the BBU through the uplink subframe; determined according to the calibration control information. After the calibration is performed, the calibration sequence is sent through the calibration antenna, and the calibration sequence sent by the working antenna is received, and the received calibration sequence is sent as calibration data to the BBU in the uplink subframe.

具体的，步骤 20中 BBU发送校准控制信息使用的下行子帧与发送校准序列使用的下行子帧的位置关系具体为：中，且发送所述校准控制信息与发送所述校准序列的资源位置占用无线帧中发送无效信号的资源位置，且发送所述校准控制信息的资源位置在时间上提前于发送所述校准序列的资源位置。 Specifically, the location relationship between the downlink subframe used by the BBU to send the calibration control information and the downlink subframe used by the sending calibration sequence in step 20 is specifically: and the calibration control information is sent and the resource location of the calibration sequence is used. The resource location of the invalid signal is transmitted in the radio frame, and the resource location at which the calibration control information is transmitted is temporally advanced over the resource location in which the calibration sequence is transmitted.

发校准序列和收校准序列不能出现在同一无线帧中，即同一无线帧中或者有发校准序列和校准控制信息，或者有收校准序列和校准控制信息，或者只有校准控制信息没有校准序列。 The calibration sequence and the calibration sequence cannot appear in the same radio frame, that is, there is either a calibration sequence and calibration control information in the same radio frame, or a calibration sequence and calibration control information, or only calibration control information has no calibration sequence.

举例说明， LTE的无线帧结构包含 10个 1ms子帧，分别为子帧 0到子帧 9, 发送校准控制信息使用的下行子帧为一个无线帧中的子帧 1 ; 在校准控制信息指示进行发校准时，发校准的校准序列在子帧 1中；在校准控制信息指示进行收校准时，收校准的校准序列在子帧 6中； For example, the radio frame structure of the LTE includes ten 1 ms subframes, which are subframe 0 to subframe 9, respectively, and the downlink subframe used for transmitting the calibration control information is subframe 1 in one radio frame; the calibration control information indicates When the calibration is performed, the calibration sequence of the calibration is in the subframe 1; when the calibration control information indicates the calibration is performed, the calibration sequence of the calibration is in the subframe 6;

当然，发送校准控制信息和发送校准序列间的位置关系并不局限于上述方式，还可以是其他任何方式，只要未占用有用信号的位置且校准控制信息在校准序列之前，以及 BBU 和 RRU对该位置关系预先达成一致的理解即可。 Of course, the positional relationship between the transmission calibration control information and the transmission calibration sequence is not limited to the above manner, and may be any other manner as long as the position of the useful signal is not occupied and the calibration control information is before the calibration sequence, and the BBU and the RRU The positional relationship can be agreed in advance.

较佳的， BBU使用与 RRU间的下行数据通路将所述校准控制信息和校准序列发送给 RRU, 从而复用 BBU与 RRU间的下行数据通路传输校准控制信息和校准序列，以合理利用传输资源。 Preferably, the BBU sends the calibration control information and the calibration sequence to the RRU by using a downlink data path between the BRU and the RRU, so as to multiplex the downlink data path between the BBU and the RRU to transmit calibration control information and a calibration sequence to utilize the transmission resource reasonably. .

下面结合具体实施例对本申请进行说明： The present application is described below in conjunction with specific embodiments:

如图 3A所示，射频单元即 RRU, 除射频单元以外的部分即为 BBU; AC控制字即校准控制信息， AC即天线校准。 As shown in FIG. 3A, the radio unit is the RRU, and the part other than the radio unit is the BBU; the AC control word is the calibration control information, and the AC is the antenna calibration.

以 LTE***为例，具体实现方法如下： Take the LTE system as an example. The specific implementation method is as follows:

LTE的一个无线帧包含 10个 lms的子帧，分别为子帧 0到子帧 9, 在每个 10ms的无线帧中， AC控制字位于子帧 1的第一个釆样点，每个 10ms的无线帧的子帧 1的第一个釆样点都要放 AC控制字（控制字的不同数值区分是否做 AC校准，以及在做 AC校准时是做收校准还是发校准），而校准序列只在要做 AC的无线帧下发，发校准的校准序列在子帧 1发，收校准的校准序列在子帧 6发，这样 AC控制字和校准序列就和其它下行子帧数据一起传到 RRU, RRU截取并判断 AC控制字，进行 AC的开关控制即可。收到的校准数据随正常的上行数据一起传回给 BBU, BBU进行 AC相关处理。整个流程筒化清晰，减少了***间交互。 LTE无线帧中 AC控制字和校准序列的位置示意图如图 3B所示。 A radio frame of LTE includes 10 lm subframes, which are subframe 0 to subframe 9, respectively. In each 10 ms radio frame, the AC control word is located at the first sample point of subframe 1, each 10 ms. The first sample point of subframe 1 of the radio frame shall be placed with the AC control word (the different values of the control word distinguish whether to perform AC calibration, and when doing AC calibration) Whether the calibration is performed or the calibration is performed, and the calibration sequence is only sent in the radio frame to be AC. The calibration sequence sent in calibration is sent in subframe 1, and the calibration sequence in calibration is sent in subframe 6, so that the AC control word and The calibration sequence is transmitted to the RRU along with other downlink subframe data, and the RRU intercepts and judges the AC control word to perform AC switching control. The received calibration data is transmitted back to the BBU along with the normal uplink data, and the BBU performs AC related processing. The entire process is clear and the interaction between systems is reduced. The location of the AC control word and calibration sequence in the LTE radio frame is shown in Figure 3B.

具体流程如下： The specific process is as follows:

步骤一：在需要执行天线校准时， BBU的校准序列生成模块生成 AC控制字和校准序列，组帧模块将 AC控制字放在无线帧的子帧 1的第一个釆样点发送给射频单元，若执行发校准，则将校准序列放在无线帧的子帧 1的保护间隔（Guard Period, GP ) 时隙中发送给射频单元，若执行收校准，则将校准序列放在无线帧的子帧 6的 GP时隙中发送给射频单元； Step 1: When the antenna calibration needs to be performed, the calibration sequence generation module of the BBU generates an AC control word and a calibration sequence, and the framing module sends the AC control word to the first sample of the subframe 1 of the radio frame and sends it to the radio unit. If the calibration is performed, the calibration sequence is sent to the radio unit in the guard interval (GP) slot of the subframe 1 of the radio frame. If the calibration is performed, the calibration sequence is placed in the radio frame. The GP time slot of frame 6 is sent to the radio frequency unit;

步骤二：若射频单元在子帧 1上接收到 AC控制字且判定为做发校准，则通过 AC开关控制执行发校准，将得到的校准数据随正常的上行数据一起通过上行子帧发送给 BBU; 若射频单元在子帧 1上接收到 AC控制字且判定为做收校准，则通过 AC开关控制执行收校准，将得到的校准数据随正常的上行数据一起通过上行子帧发送给 BBU; Step 2: If the RF unit receives the AC control word on the subframe 1 and determines that the calibration is performed, the calibration is performed by the AC switch control, and the obtained calibration data is sent to the BBU through the uplink subframe along with the normal uplink data. If the RF unit receives the AC control word on the subframe 1 and determines to perform the calibration, the calibration is performed by the AC switch control, and the obtained calibration data is sent to the BBU through the uplink subframe along with the normal uplink data;

步骤三： BBU的校准系数计算模块根据接收到的校准数据得到校准系数，补偿模块根据该校准系数对上下行信号进行校准调整。 Step 3: The calibration coefficient calculation module of the BBU obtains a calibration coefficient according to the received calibration data, and the compensation module performs calibration adjustment on the uplink and downlink signals according to the calibration coefficient.

参见图 4, 本申请实施例提供一种基站，该基站包括： Referring to FIG. 4, an embodiment of the present application provides a base station, where the base station includes:

BBU40, 用于在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将所述校准控制信息和校准序列发送给该基站的 RRU41；其中发送所述校准控制信息使用的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。 The BBU 40 is configured to generate calibration control information and a calibration sequence when the antenna calibration needs to be performed, and send the calibration control information and the calibration sequence to the RRU 41 of the base station by using a downlink subframe; where the calibration data used by the calibration control information is sent A calibration coefficient is obtained, and the uplink and downlink signals are calibrated and adjusted according to the calibration coefficient.

RRU41 , 用于在下行子帧上接收到所述校准控制信息和校准序列后，根据所述校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU40。 The RRU 41 is configured to: after receiving the calibration control information and the calibration sequence on the downlink subframe, determine, according to the calibration control information, whether to perform calibration or receive calibration, perform corresponding antenna calibration according to the determination result, and obtain a calibration. The data is sent to the BBU 40 through the uplink subframe.

进一步的，所述 BBU40还用于： Further, the BBU 40 is further configured to:

在不需要执行天线校准时，生成校准控制信息，通过下行子帧将所述校准控制信息发送给 RRU41 ; When the antenna calibration is not required to be performed, calibration control information is generated, and the calibration control information is sent to the RRU 41 through the downlink subframe;

所述 RRU41 还用于：在下行子帧上接收到所述校准控制信息后，根据接收到的校准控制信息确定不需要执行天线校准。 The RRU 41 is further configured to: after receiving the calibration control information on the downlink subframe, determine that the antenna calibration does not need to be performed according to the received calibration control information.

进一步的，所述 RRU41用于： Further, the RRU 41 is used to:

在根据所述校准控制信息确定执行发校准后，通过工作天线发送校准序列，通过校准天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU40; After determining to perform the calibration according to the calibration control information, the calibration sequence is sent by the working antenna, the calibration sequence sent by the calibration antenna is received, and the received calibration sequence is sent as calibration data to the calibration subframe through the uplink subframe. BBU40;

在根据所述校准控制信息确定执行收校准后，通过校准天线发送校准序列，通过工作天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU40。 After determining to perform the calibration according to the calibration control information, the calibration sequence is transmitted by the calibration antenna, the calibration sequence sent by the working antenna is received, and the received calibration sequence is transmitted as calibration data to the BBU 40 through the uplink subframe.

进一步的，发送所述校准控制信息使用的下行子帧与发送所述校准序列使用的下行子帧的位置关系具体为：一无线帧中，且发送所述校准控制信息与发送所述校准序列的资源位置占用无线帧中发送无效信号的资源位置，且发送所述校准控制信息的资源位置在时间上提前于发送所述校准序列的资源位置。 Further, the positional relationship between the downlink subframe used for sending the calibration control information and the downlink subframe used by the calibration sequence is specifically: in a radio frame, and sending the calibration control information and sending the calibration sequence The resource location occupies a resource location in the radio frame that transmits an invalid signal, and the resource location that sent the calibration control information is temporally ahead of the resource location in which the calibration sequence was sent.

进一步的，发送所述校准控制信息使用的下行子帧为一个无线帧中的子帧 1 ; Further, the downlink subframe used for sending the calibration control information is subframe 1 in one radio frame;

在所述校准控制信息指示进行发校准时，发送所述校准序列使用的下行子帧为子帧 1 ; 在所述校准控制信息指示进行收校准时，发送所述校准序列使用的下行子帧为子帧 6。 When the calibration control information indicates that calibration is performed, the downlink subframe used for transmitting the calibration sequence is subframe 1; when the calibration control information indicates that calibration is performed, the downlink subframe used for transmitting the calibration sequence is Subframe 6.

所述 BBU40用于：使用与 RRU41间的下行数据通路将所述校准控制信息和校准序列发送给 RRU41。 The BBU 40 is configured to: send the calibration control information and the calibration sequence to the RRU 41 using a downlink data path with the RRU 41.

综上，本申请的有益效果包括： In summary, the beneficial effects of the application include:

本申请实施例提供的方案中，基站的 BBU在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将校准控制信息和校准序列发送给该基站的 RRU; 其中发送在下行子帧上接收到校准控制信息和校准序列后，根据校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU; BBU根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。可见，本方案中的天线校准流程减少了模块间的交互，从而筒化了天线校准的实现流程，降低了实现时的软硬件成本，还可以筒化天线校准调试过程，降低实现难度，减少应用中发生问题的概率，降低问题定位难度，同时，可以消除不同厂商 AC设计的差异，有利于实现不同厂家的 BBU和 RRU互通。 In the solution provided by the embodiment of the present application, when the BBU of the base station needs to perform antenna calibration, the calibration control information and the calibration sequence are generated, and the calibration control information and the calibration sequence are sent to the RRU of the base station by using the downlink subframe; After receiving the calibration control information and the calibration sequence on the frame, determining whether to perform the calibration or the calibration according to the calibration control information, performing the corresponding antenna calibration according to the determination result, and transmitting the obtained calibration data to the BBU through the uplink subframe; The received calibration data obtains a calibration coefficient, and the upstream and downstream signals are calibrated and adjusted according to the calibration coefficient. It can be seen that the antenna calibration process in the solution reduces the interaction between the modules, thereby simplifying the implementation process of the antenna calibration, reducing the hardware and software costs in implementation, and also simplifying the antenna calibration and debugging process, reducing the implementation difficulty and reducing the application. The probability of occurrence of problems can reduce the difficulty of problem location. At the same time, the difference between AC designs of different vendors can be eliminated, which is beneficial to realize the interoperability between BBUs and RRUs of different manufacturers.

并且，本方案中， BBU将校准控制信息和校准序列通过下行子帧传递给 RRU, 也即校准控制信息和校准序列复用 BBU和 RRU间的数据通道传输，发送校准控制信息使用的下行子帧与发送校准序列使用的下行子帧之间具有预设的位置关系，不需要将校准控制信息生成和分发给其他子***，将校准控制信息，校准序列打入帧结构中随业务数据传递到 RRU即可，实现了硬件的最筒化和复用，以及，校准控制信息和校准序列可以保证以正确的位置关系传递给 RRU, 从而保证了 RRU的正确操作以保证校准序列的发送和回收的正确性。本申请是参照根据本申请实施例的方法、设备（***）、和计算机程序产品的流程图和 /或方框图来描述的。应理解可由计算机程序指令实现流程图和 /或方框图中的每一流程和 /或方框、以及流程图和 /或方框图中的流程和 /或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的装置。 Moreover, in the solution, the BBU transmits the calibration control information and the calibration sequence to the RRU through the downlink subframe, that is, the calibration control information and the calibration sequence multiplex the data channel transmission between the BBU and the RRU, and send the downlink subframe used by the calibration control information. There is a preset positional relationship with the downlink subframe used for transmitting the calibration sequence, and it is not necessary to generate and distribute the calibration control information to other subsystems, and the calibration control information and the calibration sequence are entered into the frame structure and transmitted to the RRU along with the service data. That is, the finalization and multiplexing of the hardware is realized, and the calibration control information and the calibration sequence can be guaranteed to be transmitted to the RRU in the correct positional relationship, thereby ensuring the correct operation of the RRU to ensure the correct transmission and recovery of the calibration sequence. Sex. The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能。 The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和 /或方框图一个方框或多个方框中指定的功能的步骤。 These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

尽管已描述了本申请的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权利要求意欲解释为包括优选实施例以及落入本申请范围的所有变更和修改。 Although the preferred embodiment of the present application has been described, those skilled in the art can make additional changes and modifications to the embodiments once they are aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。 It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

权利要求 Rights request

1、一种天线校准方法，其特征在于，该方法包括： 1. An antenna calibration method, characterized in that the method includes:

基站的基带单元 BBU在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将所述校准控制信息和校准序列发送给该基站的远端射频单元 RRU;其中发送所系； When the baseband unit BBU of the base station needs to perform antenna calibration, it generates calibration control information and calibration sequence, and sends the calibration control information and calibration sequence to the remote radio frequency unit RRU of the base station through the downlink subframe; where the sending unit is;

RRU在下行子帧上接收到所述校准控制信息和校准序列后，根据所述校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU; After receiving the calibration control information and calibration sequence on the downlink subframe, the RRU determines whether to perform transmit calibration or receive calibration according to the calibration control information, performs corresponding antenna calibration according to the determination result, and passes the obtained calibration data through the uplink The subframe is sent to the BBU;

BBU根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整。 The BBU obtains the calibration coefficient based on the received calibration data, and performs calibration adjustments on the uplink and downlink signals based on the calibration coefficient.

2、如权利要求 1所述的方法，其特征在于， BBU在不需要执行天线校准时，生成校准控制信息，通过下行子帧将所述校准控制信息发送给 RRU; 2. The method of claim 1, wherein the BBU generates calibration control information when there is no need to perform antenna calibration, and sends the calibration control information to the RRU through the downlink subframe;

RRU在下行子帧上接收到所述校准控制信息后，根据接收到的校准控制信息确定不需要执行天线校准。 After receiving the calibration control information on the downlink subframe, the RRU determines that antenna calibration does not need to be performed based on the received calibration control information.

3、如权利要求 1所述的方法，其特征在于，所述按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU, 具体包括： 3. The method according to claim 1, characterized in that: performing corresponding antenna calibration according to the determination result, and sending the obtained calibration data to the BBU through the uplink subframe, specifically including:

在根据所述校准控制信息确定执行发校准后，通过工作天线发送校准序列，通过校准天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU; 在根据所述校准控制信息确定执行收校准后，通过校准天线发送校准序列，通过工作天线接收发出的校准序列，将接收到的校准序列作为校准数据通过上行子帧发送给 BBU。 After it is determined to perform the calibration according to the calibration control information, the calibration sequence is sent through the working antenna, the calibration sequence is received through the calibration antenna, and the received calibration sequence is sent to the BBU through the uplink subframe as calibration data; After the calibration control information determines that the reception calibration is performed, the calibration sequence is sent through the calibration antenna, the calibration sequence is received through the working antenna, and the received calibration sequence is sent to the BBU through the uplink subframe as calibration data.

4、如权利要求 1 所述的方法，其特征在于，发送所述校准控制信息使用的下行子帧与发送所述校准序列使用的下行子帧的位置关系具体为：一无线帧中，且发送所述校准控制信息与发送所述校准序列的资源位置占用无线帧中发送无效信号的资源位置，且发送所述校准控制信息的资源位置在时间上提前于发送所述校准序列的资源位置。 4. The method of claim 1, wherein the positional relationship between the downlink subframe used to send the calibration control information and the downlink subframe used to send the calibration sequence is specifically: in a wireless frame, and sending The calibration control information and the resource location for sending the calibration sequence occupy the resource location for sending the invalid signal in the wireless frame, and the resource location for sending the calibration control information is ahead of the resource location for sending the calibration sequence in time.

5、如权利要求 4 所述的方法，其特征在于，发送所述校准控制信息使用的下行子帧为一个无线帧中的子帧 1 ; 5. The method of claim 4, wherein the downlink subframe used to send the calibration control information is subframe 1 in a wireless frame;

在所述校准控制信息指示进行发校准时，发送所述校准序列使用的下行子帧为子帧 1 ; 在所述校准控制信息指示进行收校准时，发送所述校准序列使用的下行子帧为子帧 6。 When the calibration control information indicates that transmission calibration is to be performed, the downlink subframe used to send the calibration sequence is subframe 1; when the calibration control information indicates that reception calibration is to be performed, the downlink subframe used to send the calibration sequence is subframe 1. Subframe 6.

6、如权利要求 1-5中任一所述的方法，其特征在于， BBU使用与 RRU间的下行数据通路将所述校准控制信息和校准序列发送给 RRU。 6. The method according to any one of claims 1 to 5, characterized in that the BBU uses the downlink data path with the RRU to send the calibration control information and the calibration sequence to the RRU.

7、一种基站，其特征在于，该基站包括： 7. A base station, characterized in that the base station includes:

基带单元 BBU, 用于在需要执行天线校准时，生成校准控制信息和校准序列，通过下行子帧将所述校准控制信息和校准序列发送给该基站的远端射频单元 RRU;其中发送所述以及，根据接收到的校准数据得到校准系数，并根据该校准系数对上下行信号进行校准调整； The baseband unit BBU is configured to generate calibration control information and a calibration sequence when antenna calibration needs to be performed, and send the calibration control information and calibration sequence to the remote radio frequency unit RRU of the base station through the downlink subframe; wherein the and , obtain the calibration coefficient based on the received calibration data, and perform calibration adjustments on the uplink and downlink signals based on the calibration coefficient;

RRU, 用于在下行子帧上接收到所述校准控制信息和校准序列后，根据所述校准控制信息确定是执行发校准或是收校准，按照确定结果执行相应的天线校准，将得到的校准数据通过上行子帧发送给 BBU。 The RRU is configured to, after receiving the calibration control information and calibration sequence on the downlink subframe, determine whether to perform transmit calibration or receive calibration according to the calibration control information, perform corresponding antenna calibration according to the determination result, and obtain the calibration Data is sent to the BBU through the uplink subframe.

8、如权利要求 7所述的基站，其特征在于，所述 BBU还用于： 8. The base station according to claim 7, characterized in that the BBU is also used for:

在不需要执行天线校准时，生成校准控制信息，通过下行子帧将所述校准控制信息发送给 RRU; When there is no need to perform antenna calibration, generate calibration control information and send the calibration control information to the RRU through the downlink subframe;

所述 RRU还用于：在下行子帧上接收到所述校准控制信息后，根据接收到的校准控制信息确定不需要执行天线校准。 The RRU is also configured to: after receiving the calibration control information on the downlink subframe, determine that antenna calibration does not need to be performed based on the received calibration control information.

9、如权利要求 7所述的基站，其特征在于，所述 RRU用于： 9. The base station according to claim 7, characterized in that the RRU is used for:

10、如权利要求 7所述的基站，其特征在于，发送所述校准控制信息使用的下行子帧与发送所述校准序列使用的下行子帧的位置关系具体为：一无线帧中，且发送所述校准控制信息与发送所述校准序列的资源位置占用无线帧中发送无效信号的资源位置，且发送所述校准控制信息的资源位置在时间上提前于发送所述校准序列的资源位置。 10. The base station according to claim 7, wherein the positional relationship between the downlink subframe used to send the calibration control information and the downlink subframe used to send the calibration sequence is specifically: in a radio frame, and sending The calibration control information and the resource location for sending the calibration sequence occupy the resource location for sending the invalid signal in the wireless frame, and the resource location for sending the calibration control information is ahead of the resource location for sending the calibration sequence in time.

11、如权利要求 10所述的基站，其特征在于，发送所述校准控制信息使用的下行子帧为一个无线帧中的子帧 1 ; 11. The base station according to claim 10, characterized in that, the downlink subframe used to send the calibration control information is subframe 1 in a radio frame;

在所述校准控制信息指示进行发校准时，发送所述校准序列使用的下行子帧为子帧 1 ; 在所述校准控制信息指示进行收校准时，发送所述校准序列使用的下行子帧为子帧 6。 When the calibration control information indicates transmission calibration, the downlink subframe used to send the calibration sequence is subframe 1; when the calibration control information indicates reception calibration, the downlink subframe used to send the calibration sequence is subframe 1. Subframe 6.

12、如权利要求 7-11中任一所述的基站，其特征在于，所述 BBU用于： 12. The base station according to any one of claims 7-11, characterized in that the BBU is used for:

使用与 RRU间的下行数据通路将所述校准控制信息和校准序列发送给 RRU。 The calibration control information and calibration sequence are sent to the RRU using the downlink data path with the RRU.