WO2018103083A1 - 协议转换方法及装置 - Google Patents

协议转换方法及装置 Download PDF

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Publication number
WO2018103083A1
WO2018103083A1 PCT/CN2016/109260 CN2016109260W WO2018103083A1 WO 2018103083 A1 WO2018103083 A1 WO 2018103083A1 CN 2016109260 W CN2016109260 W CN 2016109260W WO 2018103083 A1 WO2018103083 A1 WO 2018103083A1
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Prior art keywords
data
cpri
ethernet packet
protocol conversion
wireless device
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PCT/CN2016/109260
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English (en)
French (fr)
Inventor
董平
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201680091154.3A priority Critical patent/CN109997383B/zh
Priority to PCT/CN2016/109260 priority patent/WO2018103083A1/zh
Publication of WO2018103083A1 publication Critical patent/WO2018103083A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components

Definitions

  • the present application relates to the field of communications technologies, and in particular, to a protocol conversion method and apparatus.
  • a Radio Equipment Controller REC
  • RE Radio Equipment
  • fronthaul communication communication between a Radio Equipment Controller (REC) and a Radio Equipment (RE), and between different REs
  • the REC is usually a Baseband Unit (BBU)
  • BBU Baseband Unit
  • RRU Remote Radio Unit
  • fronthaul interfaces such as the Common Public Radio Interface (CPRI).
  • CPRI Common Public Radio Interface
  • the CPRI protocol does not support flexible switching.
  • the Ethernet protocol supports flexible switching, allowing complex networking between multiple endpoints of communication.
  • the fronthaul communication based on Ethernet is called Radio on Ethernet (RoE).
  • RoE Radio on Ethernet
  • the REC and the RE can be connected through the Ethernet protocol.
  • the existing network has a large number of traditional RRUs that only support the CPRI protocol.
  • the network based on the RoE interface is not compatible with the traditional RE.
  • an embodiment of the present invention provides a protocol conversion method and apparatus, so that a network based on an Ethernet protocol is compatible with a legacy RE.
  • the first aspect provides a protocol conversion method, including: the protocol conversion apparatus receives a first Ethernet packet sent by a wireless device controller REC, where the first Ethernet packet carries a first common universal wireless interface CPRI data.
  • the protocol conversion device performs traffic shaping on the first CPRI data, and sends the first CPRI data to the wireless device RE.
  • the protocol conversion apparatus is to perform the first Before the CPRI data is sent to the wireless device, the method further includes the protocol conversion device adding a layer 1 synchronization control word on the first CPRI data.
  • the method further includes: the protocol conversion apparatus receiving the second CPRI data sent by the wireless device; The protocol conversion device packs the second CPRI data in a second Ethernet message; the protocol conversion device sends the second Ethernet message to the wireless device controller.
  • the protocol converting apparatus in the second Ethernet packet, includes: the protocol conversion apparatus The second CPRI data is split according to a preset length and constitutes a second Ethernet packet.
  • the second aspect provides a protocol conversion apparatus, where the protocol conversion apparatus includes a receiving unit, a processing unit, and a sending unit, and the receiving unit is configured to receive a first Ethernet packet sent by the wireless device controller REC.
  • the first Ethernet packet carries the first common universal radio interface CPRI data; the processing unit is configured to perform traffic shaping on the first CPRI data; and the sending unit is configured to: use the first CPRI The data is sent to the wireless device RE.
  • the processing unit is further configured to add a layer 1 synchronization control on the first CPRI data before sending the first CPRI data to the wireless device. word.
  • the receiving unit is further configured to receive second CPRI data that is sent by the wireless device;
  • the sending unit is further configured to: send the second Ethernet packet to the second Ethernet packet; and the sending unit is further configured to send the second Ethernet packet to the wireless device controller.
  • the processing unit by the processing unit, the second CPRI data in the second Ethernet packet, includes: the processing unit, And configured to split the second CPRI data according to a preset length and form a second Ethernet packet.
  • a method for protocol conversion comprising: receiving, by a protocol conversion device, a first Ethernet packet and a second Ethernet packet sent by a wireless device controller REC, the first Ethernet
  • the network message carries the same direction orthogonal IQ data and the second Ethernet message carries control plane data;
  • the protocol conversion device maps the IQ data and the control plane data to the first common universal radio interface CPRI frame, And sending the CPRI frame to the wireless device RE.
  • the method further includes: the protocol conversion apparatus receives a second CPRI frame sent by the wireless device, and packages the IQ data of the second CPRI frame in a third Sending, by the Ethernet packet, the third Ethernet packet to the wireless device controller, and sending the fourth Ethernet packet in the second CPRI frame to the wireless device controller.
  • a fourth aspect provides a protocol conversion apparatus, where the apparatus includes a receiving unit, a processing unit, and a sending unit, and the receiving unit is configured to receive a first Ethernet packet and a second Ethernet sent by the wireless device controller REC a network packet, where the first Ethernet packet carries the same orthogonal IQ data and the second Ethernet packet carries control plane data; the processing unit is configured to: use the IQ data and the control plane data Mapping to the first common universal radio interface CPRI frame; the sending unit, configured to send the CPRI frame to the wireless device RE.
  • the receiving unit is further configured to receive a second CPRI frame that is sent by the wireless device
  • the processing unit is further configured to: use the IQ of the second CPRI frame
  • the data is encapsulated in the third Ethernet packet
  • the sending unit is further configured to send the third Ethernet packet and the fourth Ethernet packet in the second CPRI frame to the wireless device for control. Device.
  • the network based on the Ethernet protocol is compatible with the traditional RE.
  • FIG. 1 is a schematic structural diagram of a CPRI frame in the prior art
  • FIG. 2 is a schematic diagram of networking shown in an embodiment of the present invention.
  • FIG. 3 is a schematic diagram of a networking diagram according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic diagram of networking shown in an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a networking diagram according to an embodiment of the present invention.
  • Figure 5b is a schematic diagram of networking shown in the embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a protocol conversion method according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a protocol conversion apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of a wireless device controller according to an embodiment of the present disclosure.
  • FIG. 9 is a schematic diagram of a protocol conversion method according to an embodiment of the present invention.
  • FIG. 10 is a schematic diagram of a protocol conversion apparatus according to an embodiment of the present invention.
  • the CPRI frame structure is as shown in FIG. 1 and includes two planes and two layers.
  • the three planes are User plane, Control and Management plane (C&M plane) and Synchronization (SYN); the two layers are physical layer (Layer 1, L1) and data link layer (Layer). 2, L2).
  • User plane data includes user's In-phase and Quadrature data (IQ data) and control word (CtlWord); control management plane data includes Ethernet (Ethernet) data, high-speed data link control (High-Level Data) Link Control, HDLC) data and control words (CtlWord), where Ethernet data is used for fast control management (Fast C&M), HDLC data is used for slow control management (Slow C&M); synchronization plane can use L1 in-band protocol (L1Inband) Protocol).
  • L1 mainly defines a time division multiplexing characteristic, an electrical transmission characteristic, an optical transmission characteristic, and the like.
  • the network shown in Figure 2 to Figure 4 may be displayed. Since the legacy RE only supports the CPRI protocol, it cannot communicate normally with the new REC. In the subsequent embodiments of the present invention, RECs and REs supporting the Ethernet protocol are referred to as new RECs and new REs, and REs supporting only the CPRI protocol are referred to as legacy REs.
  • Baseband box refers to the newly generated functional unit or module that independently supports the baseband function after CPRI re-segmentation.
  • the embodiment of the invention provides a solution for reciprocating the RoE protocol and the CPRI protocol.
  • the networking structure can be as shown in Figure 5a.
  • RoE refers to a network that supports RoE.
  • the embodiment of the invention provides a protocol conversion method, which is briefly described as follows:
  • the new REC packs the data belonging to a CPRI link in a RoE message and passes it to the protocol conversion device supporting RoE. After receiving the packet, the protocol conversion device takes out the data and sends it according to the CPRI protocol to the legacy RE.
  • the protocol conversion device receives the CPRI data from the legacy RE, encapsulates it in the RoE message, and sends it to the legacy REC.
  • the protocol conversion device can process the control word that completes the L1 synchronization process according to the requirements of the CPRI protocol.
  • This synchronization process requires the use of several control words used locally, such as the underlined control words in Table 1. The meaning of each part of the table can be found in the CPRI protocol, which is not described in this application.
  • multiple RECs multiplex one protocol conversion device for example, the networking structure as shown in FIG. 5b.
  • the C&M data is sorted and sent to the legacy RE.
  • the IQ data is broadcast or sent to the new REC on demand.
  • the CPRI clock of the protocol conversion device and the CPRI clock of the REC have a delay, which is embodied in HFN (Super Frame Number) + BFN (NodeB Frame Number).
  • HFN Super Frame Number
  • BFN NodeB Frame Number
  • the deviation of the REC and CPRI clocks can be measured in the ROE network.
  • the position of the CPRI clock synchronization control word is as shown in the underlined part of Table 2.
  • the embodiment of the present invention further provides a protocol conversion method, as shown in FIG. 6 (FIG. 6 is only a schematic diagram, and all the steps of the method are not listed, and the other steps listed in the other figures are not all mandatory steps. ), the method includes:
  • the new REC packages the CPRI data in the RoE message and sends the data to the protocol conversion device.
  • the protocol conversion apparatus receives the RoE packet, performs traffic shaping on the CPRI data, and sends the CPRI data to the traditional RE.
  • the traffic shaping may be to form the CPRI data into a CPRI frame according to the CPRI protocol.
  • the protocol conversion device adds the L1 synchronization control word to the CPRI data before transmitting the CPRI data to the CPRI link.
  • the traditional RE receives the CPRI data.
  • the CPRI data includes control data, IQ data, and control words.
  • the method further includes:
  • the new REC configures the protocol conversion device, including the RoE message for transmitting the CPRI data, the rate of the CPRI, and the like.
  • the above method may further include:
  • the traditional RE sends the CPRI data to the protocol conversion device.
  • the protocol conversion device After receiving the CPRI data, the protocol conversion device packages the data in the RoE packet and sends the data to the new REC.
  • Packing the data in the RoE packet may include: splitting the CPRI data into a ROE packet according to a preset length.
  • the split length is variable.
  • the new REC receives the RoE packet carrying the CPRI data, and parses the CPRI data from the packet.
  • the new REC can obtain control data and IQ data from the RoE message parsing.
  • the network based on the RoE interface can be compatible with the traditional RE through the protocol conversion device.
  • the RoE packet may be an Ethernet packet.
  • the embodiment of the present invention further provides an apparatus embodiment for performing the foregoing protocol conversion method.
  • the specific method steps, principles, technical effects, and the like may be referred to the foregoing method embodiments, and are not further described herein.
  • the embodiment of the present invention provides a protocol conversion apparatus.
  • the protocol conversion apparatus includes a receiving unit 701, a processing unit 702, and a sending unit 703.
  • the receiving unit 701 is configured to receive an Ethernet packet sent by the wireless device controller REC, where the first Ethernet packet carries a common universal radio interface CPRI data;
  • the processing unit 702 is configured to perform traffic shaping on the CPRI data.
  • the sending unit 703 is configured to send the CPRI data to the wireless device RE.
  • the processing unit is further configured to add a layer 1 synchronization control word on the CPRI data before sending the CPRI data to the wireless device.
  • the receiving unit 701 is further configured to receive CPRI data sent by the wireless device;
  • the processing unit 702 is further configured to package the CPRI data in an Ethernet packet.
  • the sending unit 703 is further configured to send the Ethernet packet to the wireless device controller.
  • the processing unit packing the CPRI data in the Ethernet packet includes:
  • the processing unit is configured to split the CPRI data according to a preset length and form an Ethernet packet.
  • the foregoing protocol conversion device may be implemented by using a processor and a transceiver, and may also use a memory.
  • An embodiment of the present invention further provides a wireless device controller, as shown in FIG. 8, including a processing unit. 801 and transmitting unit 802.
  • the processing unit 801 is configured to package the CPRI data in the RoE message.
  • the sending unit 802 is configured to send the RoE message to the protocol conversion device.
  • the foregoing wireless device controller further includes a configuration unit 803 configured to configure the protocol conversion device, including a RoE message for transmitting the CPRI data, a rate of the CPRI, and the like.
  • the wireless device controller further includes a receiving unit 804, configured to receive a RoE packet sent by the protocol conversion device, where the RoE packet carries CPRI data.
  • the processing unit 801 is further configured to parse the RoE packet to obtain CPRI data.
  • the foregoing wireless device controller may be implemented by using a processor and a transceiver, and may also use a memory.
  • the CPRI data plane space is represented by a starting position and a length, which specifies that data in a certain RoE packet is mapped to a designated location in the CPRI data plane space. You can specify multiple pairs of mappings.
  • Control plane MAC packet exchange
  • the protocol conversion device is treated as a MAC class switching device, such as a MAC switch.
  • the RoE control plane message can be exchanged into the ethernet space in the CPRI.
  • the protocol conversion device generates a synchronization control word required by the CPRI based on synchronization with the new REC clock.
  • the new REC can obtain the correspondence between the RoE clock and the CPRI clock synchronization from the protocol conversion device.
  • the CPRI L1 synchronization process control word can be generated by a protocol conversion device.
  • the embodiment of the present invention further provides a protocol conversion method, as shown in FIG. 9 (FIG. 9 is only a schematic diagram, and all the steps of the method are not listed, and the other steps listed in the other figures are not all mandatory steps. ), the method includes:
  • the new REC sends the RoE packet carrying the IQ data and the RoE packet carrying the control plane data. Send to the protocol conversion device.
  • the protocol conversion apparatus receives the RoE message, and maps the IQ data and the control plane data into the CPRI frame, and sends the CPRI frame to the legacy RE.
  • the CPRI frame also includes a local L1 synchronization control word and a clock synchronization control word.
  • the legacy RE receives the CPRI frame.
  • the RoE packet may be an Ethernet packet.
  • the method further includes:
  • the new REC configures the protocol conversion device, including the mapping relationship between the IQ data in the RoE message and the space in the CPRI frame, and the rate of the CPRI.
  • the foregoing method further includes:
  • the traditional RE sends the CPRI frame to the protocol conversion device.
  • the protocol conversion device receives the CPRI frame, and the IQ data in the frame is packaged in the RoE message carrying the IQ, and is sent to the new REC, and the ETH message in the frame is directly sent as a RoE message to the new REC.
  • the protocol conversion device performs MAC exchange on the ETH packet in the CPRI frame, and sends the ETH packet as a RoE packet to the new REC.
  • the IQ data can be split into lengths to form a RoE message.
  • the split length is variable;
  • the new REC receives the foregoing RoE packet.
  • the network based on the RoE interface can be compatible with the traditional RE through the protocol conversion device.
  • the embodiment of the present invention further provides an apparatus embodiment for performing the foregoing protocol conversion method.
  • the specific method steps, principles, technical effects, and the like may be referred to the foregoing method embodiments, and are not further described herein.
  • An embodiment of the present invention provides a protocol conversion apparatus, including a receiving unit 1001, a processing unit 1002, and a sending unit 1003.
  • the receiving unit 1001 is configured to receive a RoE message carrying the IQ data and a RoE message carrying the control plane data, which are sent by the wireless device controller REC.
  • the processing unit 1002 is configured to map the IQ data and the control plane data into the CPRI frame.
  • the sending unit 1003 is configured to send the CPRI frame to the wireless device controller.
  • the receiving unit 1001 is further configured to receive a CPRI frame sent by the wireless device.
  • the processing unit 1002 is further configured to package the IQ data of the CPRI frame in an Ethernet packet.
  • the sending unit 1003 is further configured to send the Ethernet packet carrying the IQ data and the Ethernet packet in the CPRI frame to the wireless device controller.
  • the foregoing protocol conversion device may be implemented by using a processor and a transceiver, and may also use a memory.
  • the protocol conversion device can be one or more chips, and the processor can invoke the instructions stored in the memory to implement the functions of the processing unit described above.
  • the protocol conversion apparatus may be an independent device, or may be integrated into the BBU or the RRU.
  • Computer readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one location to another.
  • a storage medium may be any available media that can be accessed by a computer.
  • computer readable media may comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, disk storage media or other magnetic storage device, or can be used for carrying or storing in the form of an instruction or data structure.
  • Any connection may suitably be a computer readable medium.
  • the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave
  • coaxial cable , fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, wireless, and microwave
  • a disk and a disc include a compact disc (CD), a laser disc, a disc, Digital versatile discs (DVDs), floppy discs, and Blu-ray discs, in which discs are usually magnetically replicated, while discs use lasers to optically replicate data. Combinations of the above should also be included within the scope of the computer readable media.

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Abstract

本发明实施例提供了一种协议转换方法及装置，以实现基于以太网协议的网络兼容传统RE。所述方法包括：协议转换装置接收无线设备控制器REC发送的第一以太网报文，所述第一以太网报文携带有第一公共通用无线接口CPRI数据；所述协议转换装置对所述第一CPRI数据进行流量整型，将所述第一CPRI数据发送给无线设备RE。

Description

协议转换方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种协议转换方法及装置。
背景技术
无线通信系统中，无线设备控制器(Radio Equipment Controller，REC)与无线设备(Radio Equipment，RE)之间，以及不同RE之间的通信称为前传(fronthaul)通信，相应的接口称为fronthaul接口。REC通常是基带单元(Baseband Unit，BBU)，RE通常是拉远射频单元(Remote Radio Unit,RRU)。fronthaul接口有多种类型，例如公共通用无线接口(Common Public Radio Interface，CPRI)。CPRI协议不支持灵活的交换。
以太网(Ethernet)协议支持灵活的交换，允许通信的多个端点之间进行复杂的组网。基于以太网方式的fronthaul通信称为以太网无线承载(Radio on Ethernet，RoE)。基于RoE接口的网络中，REC和RE可以通过以太网协议相连接，但现网中存有大量的仅支持CPRI协议的传统RRU，基于RoE接口的网络不兼容传统RE。
发明内容
有鉴于此，本发明实施例提供了一种协议转换方法及装置，以实现基于以太网协议的网络兼容传统RE。
第一方面，提供了一种协议转换方法，包括：协议转换装置接收无线设备控制器REC发送的第一以太网报文，所述第一以太网报文携带有第一公共通用无线接口CPRI数据；所述协议转换装置对所述第一CPRI数据进行流量整型，将所述第一CPRI数据发送给无线设备RE。
在第一方面第一种可能的实现方式中，所述协议转换装置在将所述第一 CPRI数据发送给所述无线设备之前，所述方法还包括：所述协议转换装置在所述第一CPRI数据上增加层1同步控制字。
结合第一方面或第一方面第一种可能的实现方式，在第二种可能的实现方式中，所述方法还包括：所述协议转换装置接收所述无线设备发送的第二CPRI数据；所述协议转换装置将所述第二CPRI数据打包在第二以太网报文中；所述协议转换装置将所述第二以太网报文发送给所述无线设备控制器。
结合第一方面第二种可能的实现方式，在第三种可能的实现方式中，所述协议转换装置将所述第二CPRI数据打包在第二以太网报文中包括：所述协议转换装置将所述第二CPRI数据按照预设长度拆分并组成第二以太网报文。
第二方面，提供了一种协议转换装置，所述协议转换装置包括接收单元、处理单元和发送单元；所述接收单元，用于接收无线设备控制器REC发送的第一以太网报文，所述第一以太网报文携带有第一公共通用无线接口CPRI数据；所述处理单元，用于对所述第一CPRI数据进行流量整型；所述发送单元，用于将所述第一CPRI数据发送给无线设备RE。
在第二方面第一种可能的实现方式中，所述处理单元，还用于在将所述第一CPRI数据发送给所述无线设备之前，在所述第一CPRI数据上增加层1同步控制字。
结合第二方面或第二方面第一种可能的实现方式，在第二种可能的实现方式中：所述接收单元，还用于接收所述无线设备发送的第二CPRI数据；所述处理单元，还用于将所述第二CPRI数据打包在第二以太网报文中；所述发送单元，还用于将所述第二以太网报文发送给所述无线设备控制器。
结合第二方面第二种可能的实现方式，在第三种可能的实现方式中，，所述处理单元将所述第二CPRI数据打包在第二以太网报文中包括：所述处理单元，用于将所述第二CPRI数据按照预设长度拆分并组成第二以太网报文。
第三方面，提供了一种协议转换方法，所述方法包括：协议转换装置接收无线设备控制器REC发送的第一以太网报文和第二以太网报文，所述第一以太 网报文承载同向正交IQ数据和所述第二以太网报文承载控制面数据；所述协议转换装置将所述IQ数据和控制面数据映射到第一公共通用无线接口CPRI帧中，并将所述CPRI帧发送给无线设备RE。
在第三方面第一种可能的实现方式中，所述方法还包括：所述协议转换装置接收所述无线设备发送的第二CPRI帧；将所述第二CPRI帧的IQ数据打包在第三以太网报文中，将所述第三以太网报文发送给所述无线设备控制器；并将所述第二CPRI帧中的第四以太网报文发送给所述无线设备控制器。
第四方面，提供了一种协议转换装置，所述装置包括接收单元、处理单元和发送单元；所述接收单元，用于接收无线设备控制器REC发送的第一以太网报文和第二以太网报文，所述第一以太网报文承载同向正交IQ数据和所述第二以太网报文承载控制面数据；所述处理单元，用于将将所述IQ数据和控制面数据映射到第一公共通用无线接口CPRI帧中；所述发送单元，用于将将所述CPRI帧发送给无线设备RE。
在第四方面第一种可能的实现方式中：所述接收单元，还用于接收所述无线设备发送的第二CPRI帧；所述处理单元，还用于将所述第二CPRI帧的IQ数据打包在第三以太网报文中；所述发送单元，还用于将所述第三以太网报文和所述第二CPRI帧中的第四以太网报文发送给所述无线设备控制器。
通过上述协议转换方法或装置，实现了基于以太网协议的网络兼容传统RE。
附图说明
图1为现有技术中CPRI帧结构示意图；
图2为本发明实施例提供的一种组网示意图；
图3为本发明实施例提供的一种组网示意图；
图4为本发明实施例提供的一种组网示意图；
图5a为本发明实施例提供的一种组网示意图；
图5b为本发明实施例提供的一种组网示意图；
图6为本发明实施例提供的一种协议转换方法示意图；
图7为本发明实施例提供的一种协议转换装置示意图；
图8为本发明实施例提供的一种无线设备控制器示意图；
图9为本发明实施例提供的一种协议转换方法示意图；
图10为本发明实施例提供的一种协议转换装置示意图。
具体实施方式
下面结合附图对本发明实施例进行进一步的说明。
现有技术中，CPRI帧结构如图1所示，包括三个平面两个层。三个平面分别为用户面(User plane)、控制管理面(Control and Management plane,C&M plane)和同步(Synchronization,SYN)；两层为物理层(Layer 1,L1)和数据链路层(Layer 2,L2)。用户面数据包括用户的同相正交数据(In-phase and Quadrature data,IQ data)和控制字(CtlWord)；控制管理面数据包括以太网(Ethernet)数据、高速数据链路控制(High-Level Data Link Control，HDLC)数据和控制字(CtlWord)，其中，Ethernet数据用于快速控制管理(Fast C&M)，HDLC数据用于慢速控制管理(Slow C&M)；同步面可以使用L1带内协议(L1Inband Protocol)。L1主要定义了时分复用(Time Division Multiplexing)特性、电传输(Electrical Trans)特性、光传输(Optical Trans)特性等。
当REC和RE以Ethernet协议组网时，由于现网中存有仅支持CPRI协议的RE，可能导致出现如图2-图4所示的组网场景。由于传统RE仅支持CPRI协议，无法与新REC正常通信。本发明后续实施例中，将支持以太网协议的REC和RE称为新REC和新RE，将仅支持CPRI协议的RE称为传统RE。基带盒，指CPRI重切分后，新产生的独立支持基带功能的功能单元或模块。
本发明实施例提供了一种解决RoE协议和CPRI协议互转的方案。示例性的，组网结构可以如图5a所示。其中，RoE泛指支持RoE的网络。
本发明实施例提供了一种协议转换方法，简要描述如下：
在下行方向(REC->RE)：新REC将属于一条CPRI链路的数据打包在RoE报文中，传递给支持RoE的协议转换装置。协议转换装置收到报文后，取出其中的数据，按照CPRI协议向下级传统RE发送。
在上行方向(RE->REC)：协议转换装置接收来自传统RE的CPRI数据，将其封装在RoE报文中，发送给传统REC。
在上述过程中，协议转换装置可以按照CPRI协议的要求，对完成L1同步过程的控制字进行处理。该同步过程需要用到本地所使用的几个控制字，如表1中有下划线的控制字。表中各部分含义可参见CPRI协议，本申请中不做赘述。
表1
Figure PCTCN2016109260-appb-000001
为了支持协议转换装置对CPRI数据进行透传，REC还需要配置协议转换装 置上的CPRI速率，RoE透传通道。
可选的，在多个REC复用一个协议转换装置的情况下，例如，如图5b所示的组网结构。
为了支持这种组网，对C&M数据和IQ数据的透传可以采用如下方案：
1)在下行方向，对C&M数据排序发给传统RE。
2)在下行方向，对IQ数据合路(按位或)发给传统RE。
3)在上行方向，对C&M数据广播或者按需发给新REC。
按需发送给新REC时，可以先识别出是发送给哪个REC的数据，然后对应发送。
4)在上行方向，对IQ数据广播或者按需发给新REC。
按需发送给新REC时，可以先识别出是发送给哪个REC的数据，然后对应发送。
在时钟方面，协议转换装置的CPRI时钟和REC的CPRI时钟有延迟，体现在HFN(超帧号)+BFN(NodeB帧号)上。REC和CPRI时钟的偏差可以在ROE网络中测量出来。CPRI时钟同步控制字的位置如表2中加下划线部分。
表2
Figure PCTCN2016109260-appb-000002
Figure PCTCN2016109260-appb-000003
示例性的，本发明实施例进一步给出一种协议转换方法，如图6所示(图6仅是简要示意图，并没有将方法所有步骤列出，另图中所列并非都是必选步骤)，所述方法包括：
601、新REC将CPRI数据打包在RoE报文中，发送给协议转换装置。
602、协议转换装置接收RoE报文，并对CPRI数据进行流量整型，将CPRI数据发送给传统RE。
上述流量整形可以是按照CPRI协议将上述CPRI数据组成CPRI帧。
可选的，协议转换装置在将CPRI数据发送到CPRI链路上之前，在CPRI数据上增加L1同步控制字后。
603、传统RE接收CPRI数据。
其中CPRI数据包括了控制数据、IQ数据、控制字。
可选的，在步骤601之前，所述方法还包括：
新REC对协议转换装置进行配置，包括用于传输CPRI数据的RoE报文、CPRI的速率等。
上述方法还可以包括：
604、传统RE将CPRI数据发送给协议转换装置。
605、协议转换装置收到CPRI数据后，将数据打包在RoE报文中，发送给新REC。
将数据打包在RoE报文中可以包括：将CPRI数据按照预设长度拆分组成ROE报文。拆分长度可变。
606、新REC接收承载了CPRI数据的RoE报文，并从报文中解析出CPRI数据。
新REC可以从RoE报文解析得到控制数据和IQ数据。
本发明实施例中，通过协议转换装置，可以实现基于RoE接口的网络兼容传统RE。
本发明实施例中，RoE报文可以指以太网报文。
本发明实施例进一步给出执行上述协议转换方法的装置实施例，其中具体方法步骤、原理、技术效果等可以参考前述方法实施例，后文不再赘述。
本发明实施例提供了一种协议转换装置，如图7所示，协议转换装置包括接收单元701、处理单元702和发送单元703。
接收单元701，用于接收无线设备控制器REC发送的以太网报文，所述第一以太网报文携带有公共通用无线接口CPRI数据；
处理单元702，用于对所述CPRI数据进行流量整型；
发送单元703，用于将所述CPRI数据发送给无线设备RE。
可选的，所述处理单元，还用于在将所述CPRI数据发送给所述无线设备之前，在所述CPRI数据上增加层1同步控制字。
可选的，接收单元701，还用于接收所述无线设备发送的CPRI数据；
处理单元702，还用于将所述CPRI数据打包在以太网报文中；
发送单元703，还用于将所述以太网报文发送给所述无线设备控制器。
可选的，处理单元将所述CPRI数据打包在以太网报文中包括：
处理单元，用于将所述CPRI数据按照预设长度拆分并组成以太网报文。
需要说明的是，上述协议转换装置在具体产品实现时，可以通过处理器和收发器的方式实现，还可能使用到存储器。
本发明实施例还提供了一种无线设备控制器，如图8所示，包括处理单元 801和发送单元802。
处理单元801，用于将CPRI数据打包在RoE报文中。
发送单元802，用于将RoE报文发送给协议转换装置。
可选的，上述无线设备控制器还包括配置单元803，用于对协议转换装置进行配置，包括用于传输CPRI数据的RoE报文、CPRI的速率等。
可选的，上述无线设备控制器还包括接收单元804，用于接收协议转换装置发送的RoE报文，上述RoE报文携带CPRI数据。
所述处理单元801，还用于解析上述RoE报文，得到CPRI数据。
需要说明的是，上述无线设备控制器在具体产品实现时，可以通过处理器和收发器的方式实现，还可能使用到存储器。
本发明实施例给出了另一种改协议转换方案，简要描述如下：
1.配置IQ数据交换。新REC配置将指定ROE和CPRI数据面空间的映射关系。
例如CPRI数据面空间采用起始位置和长度来表示，该配置即指定将某种RoE包中的数据映射到CPRI数据面空间指定位置。可以指定多对映射关系。
2.控制面MAC报文交换。
协议转换装置被当作一个MAC类交换设备，比如MAC交换机。可以将RoE控制面报文交换到CPRI中的ethernet空间中。
3.时钟同步。
协议转换装置在和新REC时钟同步的基础上，产生CPRI需要的同步控制字。新REC可以从协议转换装置获得RoE时钟和CPRI时钟同步的对应关系。
CPRI L1同步过程控制字可以由协议转换装置产生。
示例性的，本发明实施例进一步给出一种协议转换方法，如图9所示(图9仅是简要示意图，并没有将方法所有步骤列出，另图中所列并非都是必选步骤)，所述方法包括：
901、新REC将承载IQ数据的RoE报文和承载控制面数据的RoE报文发 送给协议转换装置。
902、协议转换装置接收RoE报文，并将IQ数据和控制面数据映射到CPRI帧中，并将CPRI帧发送给传统RE。
可选的，CPRI帧还包括本地的L1同步控制字和时钟同步控制字。
903、传统RE收到CPRI帧。
其中包括了控制面数据、IQ数据和控制字。
本发明实施例中，RoE报文可以指以太网报文。
可选的，步骤801之前，所述方法还包括：
新REC对协议转换装置进行配置，包括RoE报文中IQ数据与CPRI帧中空间的映射关系、CPRI的速率。
可选的，上述方法还包括：
904、传统RE将CPRI帧发送给协议转换装置。
905、协议转换装置接收CPRI帧，将帧中的IQ数据打包在承载IQ的RoE报文中，发送给新REC，将帧中的ETH报文直接作为RoE报文发送给新REC。
可选的，协议转换装置将CPRI帧中的ETH报文进行MAC交换，作为RoE报文发送给新REC。
可选的，IQ数据可以按照长度拆分组成RoE报文。拆分长度可变；
906、新REC接收上述RoE报文。
本发明实施例中，通过协议转换装置，可以实现基于RoE接口的网络兼容传统RE。
本发明实施例进一步给出执行上述协议转换方法的装置实施例，其中具体方法步骤、原理、技术效果等可以参考前述方法实施例，后文不再赘述。
本发明实施例提供了一种协议转换装置，包括接收单元1001、处理单元1002和发送单元1003。
接收单元1001，用于接收无线设备控制器REC发送的承载IQ数据的RoE报文和承载控制面数据的RoE报文；
处理单元1002，用于将IQ数据和控制面数据映射到CPRI帧中；
发送单元1003，用于将CPRI帧发送给所述无线设备控制器。
可选的，所述接收单元1001，还用于接收所述无线设备发送的CPRI帧；
处理单元1002，还用于将CPRI帧的IQ数据打包在以太网报文中；
发送单元1003，还用于将承载IQ数据的以太网报文和CPRI帧中的以太网报文发送给无线设备控制器。
需要说明的是，上述协议转换装置在具体产品实现时，可以通过处理器和收发器的方式实现，还可能使用到存储器。
协议转换装置可以是一个或多个芯片，处理器可以调用存储在存储器中的指令实现上述处理单元的功能。
本发明实施例中可选的，协议转换装置可以是独立的设备，也可以集成于BBU或者RRU中。
通过以上的实施方式的描述，所属领域的技术人员可以清楚地了解到本发明可以用硬件实现，或固件实现，或它们的组合方式来实现。当使用软件实现时，可以将上述功能存储在计算机可读介质中或作为计算机可读介质上的一个或多个指令或代码进行传输。计算机可读介质包括计算机存储介质和通信介质，其中通信介质包括便于从一个地方向另一个地方传送计算机程序的任何介质。存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。此外。任何连接可以适当的成为计算机可读介质。例如，如果软件是使用同轴电缆、光纤光缆、双绞线、数字用户线(DSL)或者诸如红外线、无线电和微波之类的无线技术从网站、服务器或者其他远程源传输的，那么同轴电缆、光纤光缆、双绞线、DSL或者诸如红外线、无线和微波之类的无线技术包括在所属介质的定影中。如本发明所使用的，盘(Disk)和碟(disc)包括压缩光碟(CD)、激光碟、光碟、 数字通用光碟(DVD)、软盘和蓝光光碟，其中盘通常磁性的复制数据，而碟则用激光来光学的复制数据。上面的组合也应当包括在计算机可读介质的保护范围之内。
总之，以上所述仅为本发明技术方案的较佳实施例而已，并非用于限定本发明的保护范围。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (12)

  1. 一种协议转换方法，其特征在于，所述方法包括：
    协议转换装置接收无线设备控制器REC发送的第一以太网报文，所述第一以太网报文携带有第一公共通用无线接口CPRI数据；
    所述协议转换装置对所述第一CPRI数据进行流量整型，将所述第一CPRI数据发送给无线设备RE。
  2. 根据权利要求1所述的方法，其特征在于，所述协议转换装置在将所述第一CPRI数据发送给所述无线设备之前，所述方法还包括：
    所述协议转换装置在所述第一CPRI数据上增加层1同步控制字。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    所述协议转换装置接收所述无线设备发送的第二CPRI数据；
    所述协议转换装置将所述第二CPRI数据打包在第二以太网报文中；
    所述协议转换装置将所述第二以太网报文发送给所述无线设备控制器。
  4. 根据权利要求3所述的方法，其特征在于，所述协议转换装置将所述第二CPRI数据打包在第二以太网报文中包括：
    所述协议转换装置将所述第二CPRI数据按照预设长度拆分并组成第二以太网报文。
  5. 一种协议转换装置，其特征在于，所述协议转换装置包括接收单元、处理单元和发送单元；
    所述接收单元，用于接收无线设备控制器REC发送的第一以太网报文，所述第一以太网报文携带有第一公共通用无线接口CPRI数据；
    所述处理单元，用于对所述第一CPRI数据进行流量整型；
    所述发送单元，用于将所述第一CPRI数据发送给无线设备RE。
  6. 根据权利要求5所述的装置，其特征在于，所述处理单元，还用于在将所述第一CPRI数据发送给所述无线设备之前，在所述第一CPRI数据上增加层1同步控制字。
  7. 根据权利要求5或6所述的装置，其特征在于：
    所述接收单元，还用于接收所述无线设备发送的第二CPRI数据；
    所述处理单元，还用于将所述第二CPRI数据打包在第二以太网报文中；
    所述发送单元，还用于将所述第二以太网报文发送给所述无线设备控制器。
  8. 根据权利要求7所述的装置，其特征在于，所述处理单元将所述第二CPRI数据打包在第二以太网报文中包括：
    所述处理单元，用于将所述第二CPRI数据按照预设长度拆分并组成第二以太网报文。
  9. 一种协议转换方法，其特征在于，所述方法包括：
    协议转换装置接收无线设备控制器REC发送的第一以太网报文和第二以太网报文，所述第一以太网报文承载同向正交IQ数据和所述第二以太网报文承载控制面数据；
    所述协议转换装置将所述IQ数据和控制面数据映射到第一公共通用无线接口CPRI帧中，并将所述CPRI帧发送给无线设备RE。
  10. 根据权利要求9所述的方法，其特征在于，所述方法还包括：
    所述协议转换装置接收所述无线设备发送的第二CPRI帧；
    将所述第二CPRI帧的IQ数据打包在第三以太网报文中，将所述第三以太网报文发送给所述无线设备控制器；
    并将所述第二CPRI帧中的第四以太网报文发送给所述无线设备控制器。
  11. 一种协议转换装置，其特征在于，所述装置包括接收单元、处理单元和发送单元；
    所述接收单元，用于接收无线设备控制器REC发送的第一以太网报文和第二以太网报文，所述第一以太网报文承载同向正交IQ数据和所述第二以太网报文承载控制面数据；
    所述处理单元，用于将将所述IQ数据和控制面数据映射到第一公共通用无线接口CPRI帧中；
    所述发送单元，用于将将所述CPRI帧发送给无线设备RE。
  12. 根据权利要求11所述的装置，其特征在于：
    所述接收单元，还用于接收所述无线设备发送的第二CPRI帧；
    所述处理单元，还用于将所述第二CPRI帧的IQ数据打包在第三以太网报文中；
    所述发送单元，还用于将所述第三以太网报文和所述第二CPRI帧中的第四以太网报文发送给所述无线设备控制器。
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