WO2013040740A1 - Procédé et dispositif de transmission de données pour interface hertzienne publique commune - Google Patents

Procédé et dispositif de transmission de données pour interface hertzienne publique commune Download PDF

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Publication number
WO2013040740A1
WO2013040740A1 PCT/CN2011/079811 CN2011079811W WO2013040740A1 WO 2013040740 A1 WO2013040740 A1 WO 2013040740A1 CN 2011079811 W CN2011079811 W CN 2011079811W WO 2013040740 A1 WO2013040740 A1 WO 2013040740A1
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Prior art keywords
data
sent
frame
amount
ethernet
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PCT/CN2011/079811
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English (en)
Chinese (zh)
Inventor
叶双全
沈莹
张瑜
李亮
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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 CN201180002308.4A priority Critical patent/CN103535094B/zh
Priority to PCT/CN2011/079811 priority patent/WO2013040740A1/fr
Publication of WO2013040740A1 publication Critical patent/WO2013040740A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast

Definitions

  • the embodiments of the present invention relate to the field of communications, and in particular, to a method and a device for transmitting data of a common public wireless interface.
  • the Common Public Radio Interface is an industrial cooperative organization dedicated to the main interface between the radio equipment control center (REC) and the radio equipment (RE, Radio Equipment).
  • REC radio equipment control center
  • RE Radio Equipment
  • the CPRI protocol defines the interface relationship between REC and RE. Its data structure can be directly used for remote transmission of data from the repeater and becomes a remote system of the base station.
  • the implementation of the CPRI protocol of the existing device is directly transmitted through the CPRI interface. Since the existing CPRI technology only supports the coaxial cable, and the number of interfaces and the transmission distance are close, it is unable to adapt to the flexible and variable network environment.
  • the base station system includes a baseband processing device (equivalent to REC) and a plurality of transmitting and receiving units (corresponding to RE), and the RECs are respectively connected to a plurality of REs through a CPRI interface.
  • REC performs peer-to-peer data transmission with multiple REs simultaneously through the CPRI interface specification.
  • REC packs the data information corresponding to multiple REs into one data packet, and then sends the data packet to each group.
  • RE when a RE receives the packet, it only extracts its own data and discards the unnecessary data.
  • the connection cost of the hardware is high, and the connection mode of the networking is fixed, and the structure of the networking is changed in the future, and the flexibility is poor; It is the group sending data sent by the REC. After receiving the data packet, the RE only extracts its own corresponding data and discards the unnecessary data, resulting in low transmission efficiency.
  • the embodiment of the invention provides a method for transmitting general public wireless interface data and related devices, which are used for flexibly adjusting a data transmission mode in a network.
  • the method for transmitting general public wireless interface data includes: acquiring needs to be sent to The data amount of the data to be sent of the wireless device RE, the data to be sent is the general public radio interface data; determining whether the data amount of the data to be sent is greater than the data bearer of the transmission link between the data transmitting end and the RE Capability, if not, using the unicast transmission mode to form the to-be-transmitted data into an Ethernet frame, and if so, using the multicast transmission mode or the broadcast transmission mode to form the to-be-transmitted data into an Ethernet frame; Send the Ethernet frame.
  • the acquiring, by the data quantity of the to-be-transmitted data that needs to be sent to the wireless device RE includes: acquiring the number of REs that need to perform data transmission, the frame data rate of the CPRI, and the frame reserved bit; according to the number of REs and the Calculating a user plane data amount and a control plane data amount of the to-be-transmitted data, and calculating a redundant data amount of the CPRI frame converted into an Ethernet frame according to the frame reserved bit; The control plane data amount and the redundant data amount are added to obtain the data amount of the to-be-transmitted data.
  • the unicast transmission mode is used to form the to-be-sent data into an Ethernet frame, including: performing IQ data and control data separation on the to-be-transmitted data; and separating the separated IQ to any one of the three The data and the control data respectively constitute an Ethernet frame.
  • the using the multicast transmission mode or the broadcast transmission mode to form the to-be-sent data into an Ethernet frame includes: determining whether the RE belongs to two or more local area networks, and if yes, using a multicast transmission mode
  • the to-be-sent data constitutes an Ethernet frame, and if not, the to-be-transmitted data is formed into an Ethernet frame by using a broadcast transmission mode.
  • the using the multicast transmission mode to form the to-be-sent data into an Ethernet frame includes: grouping the to-be-sent data belonging to the same local area network into a group; and respectively forming each group of to-be-sent data into respective groups
  • the Ethernet frame corresponds to an Ethernet frame
  • the using the broadcast transmission mode to form the to-be-sent data into an Ethernet frame includes: directly forming the to-be-transmitted data into an Ethernet frame.
  • the wireless device control center includes: an acquiring unit, configured to acquire data volume of data to be sent that needs to be sent to the wireless device RE, where the to-be-sent data is general public wireless interface data; Whether the data amount of the data to be sent is greater than the data carrying capacity of the transmission link between the data transmitting end and the RE, and if not, the unicast transmission mode is used to form the to-be-sent data into an Ethernet frame, and if so, use
  • the multicast transmission mode or the broadcast transmission mode forms the to-be-transmitted data into an Ethernet frame, and the transmission unit is configured to send the Ethernet frame to the RE by using an Ethernet switch.
  • the acquiring unit includes: a data acquiring module, configured to acquire, in the network, The number of REs of the data transmission, the frame data rate of the CPRI, and the frame reservation bit; the data calculation module, configured to separately calculate the user plane data amount and the control plane data of the to-be-sent data according to the RE number and the frame data rate And calculating, according to the frame reserved bit, a redundant data amount converted into an Ethernet frame by the CPRI frame, and adding the user plane data amount, the control plane data amount, and the redundant data amount, to obtain the to-be-determined The amount of data sent by the data; the capability acquisition module, configured to acquire data carrying capacity of the transmission link.
  • a data acquiring module configured to acquire, in the network, The number of REs of the data transmission, the frame data rate of the CPRI, and the frame reservation bit
  • the data calculation module configured to separately calculate the user plane data amount and the control plane data of the to-be-sent data according to the RE number and the frame data rate And calculating, according to the frame reserved bit, a
  • the selecting unit includes: a first determining module, configured to determine whether the data volume of the to-be-transmitted data is greater than the data carrying capability, and if yes, triggering the first framing module, if not, triggering a second determining module, configured to perform IQ data and control data separation on the to-be-sent data in the network, and form the separated IQ data and control data into an Ethernet frame respectively; And determining whether the RE belongs to more than two local area networks, and if yes, triggering a second framing module, if not, triggering a third framing module; and the second framing module is configured to belong to the same
  • the to-be-sent data of the local area network is divided into a group, and the to-be-sent data of each group is respectively formed into an Ethernet frame corresponding to each local area network; and the third group of frame modules is configured to directly form the to-be-sent data into an Ethernet frame.
  • the base station provided by the present invention includes: REC and RE;
  • the REC is configured to obtain the data volume of the to-be-transmitted data that needs to be sent to the wireless device RE, where the to-be-sent data is the common public-wire interface data, and determine whether the data volume of the to-be-transmitted data is greater than the data sending end and the RE.
  • the data carrying capacity of the intermediate transmission link if not, the unicast transmission mode is used to form the to-be-transmitted data into an Ethernet frame, and if so, the to-be-transmitted data is formed into an Ethernet frame by using a multicast transmission mode or a broadcast transmission mode. Transmitting the Ethernet frame to the RE through an Ethernet switch.
  • the embodiments of the present invention have the following advantages: Before the data is sent to the wireless device, the technical solution provided by the embodiment of the present invention is performed according to the data volume of the data to be sent in the network and the data carrying capacity of the network. If the data volume of the data to be sent is greater than the data carrying capacity, the multicast mode or the broadcast mode is used. If the data volume of the data to be sent is less than or equal to the data carrying capacity, the unicast transmission mode is used to improve the data.
  • the efficiency of the transmission; the embodiment of the present invention flexibly adjusts the data transmission mode according to actual conditions, so that resources in the network can be optimally configured, and the utilization of network resources is improved.
  • DRAWINGS 1 is a schematic flowchart of a method for transmitting data of a general public wireless interface according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of a network of a unicast transmission mode according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a network of a multicast transmission mode according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of a network of a broadcast transmission mode according to an embodiment of the present invention.
  • FIG. 5 is another schematic flowchart of a method for transmitting data of a general public wireless interface according to an embodiment of the present invention
  • FIG. 6 is a schematic diagram of framing of a unicast transmission mode according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of framing of a multicast transmission mode according to an embodiment of the present invention.
  • FIG. 8 is another schematic flowchart of a method for transmitting data of a general public wireless interface according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a wireless device control center according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the embodiment of the invention provides a method for transmitting general public wireless interface data and related devices, which are used for flexibly adjusting a data transmission mode in a network.
  • an embodiment of a method for transmitting general public wireless interface data of the present invention includes:
  • the amount of data of the data to be sent that needs to be sent to the RE may be acquired by the REC, and the data to be sent may be General Public Radio Interface (CPRI) data.
  • CPRI General Public Radio Interface
  • the foregoing RE may be one RE or multiple REs.
  • the REC in the embodiment of the present invention may send data to the REs within the control range of the REC, or may simultaneously send another REC.
  • the RE within the control range sends data, as long as the network address of the target RE is obtained.
  • the amount of data of the to-be-sent data may be directly notified to the REC by the base station in the network, or may be
  • the REC is calculated based on the specific parameters of the current network scenario (eg, the number of REs, the data rate of CPRI, etc.).
  • the amount of data of the to-be-transmitted data may be the sum of the amount of data included in the Ethernet frame that needs to be sent to each target RE. It should be noted that the REC is converted into an Ethernet frame according to the CPRI data.
  • the amount of data calculates the amount of data of the above-mentioned data to be transmitted. 102. Determine whether the data volume of the to-be-transmitted data is greater than a data carrying capacity of a transmission link between the data sending end and the wireless device.
  • the REC may compare the data amount of the to-be-transmitted data with the data carrying capacity of the transmission link between the REC and the RE as the data transmitting end, and determine the data volume of the to-be-transmitted data. Whether it is greater than the data carrying capacity, if not, step 103 is performed, and if yes, step 104 is performed;
  • the data carrying capacity can be the maximum data transmission capacity that can be carried by the transmission link. Specifically, the maximum data transmission volume can be determined by the hardware device, and the REC can be learned after the network is accessed. Of course, the data carrying capacity can also be defined as a ratio of the maximum amount of data that can be carried, such as 90%.
  • the unicast transmission mode is used to form the to-be-sent data into an Ethernet frame.
  • the unicast transmission mode is a transmission mode for one-to-one data transmission between two network nodes. At this time, data reception and transmission are performed only between the two nodes, and the Ethernet switch pair in the network. Data is only forwarded without being copied.
  • the Ethernet switch after receiving the Ethernet frame framing in the unicast transmission mode, the Ethernet switch selects a transmission path according to the destination address marked in the Ethernet frame by using an existing unicast protocol, and transmits the Ethernet frame. Go to the specified RE.
  • the REC can perform data transmission one by one for each RE, so that the REC can perform separate services for a single RE, REC and The RE can respond to the operation of the peer end in time; and the Ethernet frame received by the RE only contains the data that the RE needs to receive, which effectively reduces the processing overhead of the RE.
  • the multicast data is formed into an Ethernet frame by using a multicast transmission mode or a broadcast transmission mode.
  • the REC knows that the data volume of the to-be-transmitted data is greater than the data bearer capability of the transmission link, the REC uniformly corresponding to each RE in the to-be-transmitted data.
  • the data is packetized to form an Ethernet frame.
  • the data corresponding to all REs may be packetized and packaged (that is, the framing mode of the multicast transmission mode), and some Ether frame (here, the number of Ethernet frames is smaller than the number of REs); the data corresponding to all REs can also be uniformly packaged (ie, the framing mode of the broadcast transmission mode) to obtain an Ethernet frame.
  • the multicast transmission mode is a mode for transmitting data to multiple target nodes at one time.
  • the multicast transmission mode it is possible to transfer data of multiple target nodes at a time, or to transmit data only to a specific object, and is a compromise transmission mode with respect to the unicast transmission mode and the broadcast transmission mode.
  • the use of the multicast transmission mode may be combined with a specific network scenario, such as whether there are several REs having the same transmission characteristic in all the REs, whether the processing conditions of the current REC are allowed, and the like.
  • the broadcast transmission mode is a transmission mode in which a network node broadcasts a message to a surrounding network node, and an Ethernet switch in the network unconditionally copies and forwards a signal sent by any one of the network nodes, and all network nodes can Receiving an Ethernet frame containing all the information (regardless of whether the network node is needed or not), the network cost of the broadcast transmission mode can be very low because no path selection is required.
  • the REC After the assembly of the Ethernet frame is completed, the REC sends the data that constitutes the Ethernet frame to the Ethernet switch, so that the Ethernet switch sends the Ethernet frame data to the corresponding RE according to the transmission address of the Ethernet frame data. After receiving the Ethernet frame data sent by the switch on the Ethernet network, the RE can recover the CPRI frame and obtain the CPRI data.
  • the technical solution provided by the embodiment of the present invention selects a transmission mode according to the data volume of the data to be sent and the data carrying capacity of the network. If the data volume of the data to be sent is greater than the data carrying capacity, the group is used. If the data volume of the data to be sent is less than or equal to the data carrying capacity, the unicast transmission mode is used for one-to-one data transmission; the embodiment of the present invention flexibly adjusts the data transmission mode according to actual conditions, so that The resources in the network can be optimally configured to improve the utilization of network resources.
  • FIG. 5 another embodiment of the method for transmitting general public radio interface data of the present invention includes:
  • the REC obtains related parameters of the current network scenario, and the parameters may include: the number of REs NRE, the frame rate X of the CPRI, and the frame reserved bits. Specifically, the REC may determine the current CPRI rate and the frame reserved bit p according to the connected CPRI device, where the frame reserved bit p is a byte used for control management in the payload of the Ethernet frame.
  • the REC calculates the user plane data amount and the control plane data amount of the to-be-transmitted data according to the number of REs NRE and the frame rate x of the CPRI, wherein the user plane data amount needs to calculate the total user plane data amount of the NRE REs, and Since the control plane data is shared by the NRE REs, the control plane data amount only needs to calculate the data amount of the single control plane information.
  • the REC calculates the amount of redundant data converted from the CPRI frame to the Ethernet frame based on the frame reserved bits, wherein the redundant data amount may include the head and tail bytes of the Ethernet frame, the bytes of the frame reserved bits, and the frame interval bytes.
  • the REC adds the above-mentioned user plane data amount, control plane data amount, and redundant data amount to obtain the data amount of the data to be transmitted.
  • the base frame period of the CPRI since the base frame period of the CPRI, the head and tail bytes of the Ethernet frame, the frame interval byte, and the bytes of the IQ data (I data and Q data) in the Ethernet frame are all known data, only the RE is required.
  • the quantity NRE, the CPRI frame data rate X, and the frame reserved bit P are substituted into the following formula 1, and the amount of data of the data to be transmitted can be obtained. *15 x*10 9
  • l/3.84MHz is the base frame period of the CPRI
  • 26 is the head and tail byte of the Ethernet frame
  • 12 is the frame interval byte of the Ethernet frame
  • 8 is the conversion ratio of the number of bytes converted into the number of bits.
  • 15 is the byte of the IQ data in the Ethernet frame.
  • the REC After calculating the data amount of the to-be-sent data in the above 502, the REC compares the data amount of the to-be-transmitted data with the size of the data carrying capacity y;
  • Step 204 > y, Bay' J execution step Step 505.
  • the unicast transmission mode is used to form the to-be-sent data into an Ethernet frame.
  • the REC base unit of each RE is used, and the unicast transmission mode is used to form the to-be-sent data of the corresponding RE into an Ethernet frame.
  • the REC packs the control data (Control data) and the IQ data (A*C Container) in the base frame into one Ethernet frame.
  • the unicast transmission mode is a transmission mode for one-to-one data transmission between two network nodes. At this time, data reception and transmission are performed only between the two nodes, and the Ethernet switch pair in the network. Data is only forwarded without being copied.
  • the Ethernet switch after receiving the Ethernet frame framing in the unicast transmission mode, the Ethernet switch selects a transmission path according to the destination address marked in the Ethernet frame by using an existing unicast protocol, and transmits the Ethernet frame. Go to the specified RE.
  • the REC can perform data transmission one by one for each RE, so that the REC can perform separate services for a single RE, and the REC The RE can respond to the peer in time, and the Ethernet frame received by the RE only contains the data that the RE needs to receive, which effectively reduces the processing overhead of the RE.
  • the data to be sent is formed into an Ethernet frame by using a multicast transmission mode or a broadcast transmission mode.
  • the REC learns that the data volume of the to-be-transmitted data is greater than the data carrying capacity of the transmission link, the REC uniformly corresponding to each RE in the to-be-transmitted data.
  • the data is packetized to form an Ethernet frame.
  • the data corresponding to all REs can be packet-packed (that is, the framing mode of the multicast transmission mode), and several Ethernet frames are obtained (the number of Ethernet frames obtained here is smaller than the number of REs).
  • the data corresponding to all REs can be uniformly packaged (ie, the framing mode of the broadcast transmission mode) to obtain an Ethernet frame. Referring to FIG. 7, specifically, the REC packs the control data (Control data) and the IQ data (A*C Container) in the base frame into different Ethernet frames.
  • the multicast transmission mode is a mode for transmitting data to multiple target nodes at one time.
  • the multicast transmission mode it is possible to transmit data of multiple target nodes at a time, or to transmit data only to a specific object, and is a compromise transmission mode with respect to the unicast transmission mode and the broadcast transmission mode.
  • the use of the multicast transmission mode may be combined with a specific network scenario, for example, whether there are several REs having the same transmission characteristic in all the REs, and the processing conditions of the current REC. Whether to allow etc.
  • M groups of the number of REs NRE may be determined, and the number of REs in each group is 1.
  • each group needs to satisfy the following formula 2 to ensure that the data transmission of each group does not exceed the data carrying capacity of the transmission link; Equation 2: 3.84*10 6 ⁇ ;y.
  • the broadcast transmission mode is a transmission mode in which a network node in an Ethernet network broadcasts a message to a surrounding network node, and an Ethernet switch (or router) in the network unconditionally copies and forwards a signal sent by any one of the network nodes, and all networks Nodes can receive Ethernet frames containing all the information (regardless of whether the network node needs it or not). Since no path selection is required, the network cost of the broadcast transmission mode can be very low.
  • the REC After the assembly of the Ethernet frame is completed, the REC sends the data that constitutes the Ethernet frame to the Ethernet switch, so that the Ethernet switch sends the Ethernet frame data to the corresponding RE according to the transmission address of the Ethernet frame data. After receiving the Ethernet frame data sent by the switch on the Ethernet network, the RE can recover the CPRI frame and obtain the CPRI data.
  • the REC uses the unicast transmission mode or the multicast transmission mode, the data to be sent is separated during framing.
  • FIG. 8 another embodiment of the method for transmitting general public radio interface data of the present invention. Includes:
  • the REC obtains related parameters of the current network scenario, and the parameters include: the number of REs NRE, the frame rate X of the CPRI, and the frame reserved bit p.
  • the REC may determine the current CPRI rate and the frame reservation bit p according to the connected CPRI device, where the frame reserved bit p is the byte used for control management in the payload of the Ethernet frame.
  • the REC calculates the data amount of the data to be sent of the current network according to the number of REs NRE, the frame rate x of the CPRI, and the frame reserved bit p, which may be: Substituting the above parameters into the formula 1 to obtain the data amount of the data to be sent. *15 x*10 9
  • l/3.84MHz is the base frame period of the CPRI
  • 26 is the head and tail byte of the Ethernet frame
  • 12 is the frame interval byte of the Ethernet frame
  • 8 is the conversion ratio of the number of bytes converted into the number of bits.
  • 15 is the byte of the IQ data in the Ethernet frame.
  • the REC compares the data amount of the data to be sent and the data carrying capacity y; 3.84*10 6 *N R£ ⁇ y, the step is executed.
  • the unicast transmission mode is used to form the to-be-sent data into an Ethernet frame.
  • the REC uses the base frame of each RE as the unit, and the IQ data and control data of each RE in the to-be-sent data (CM) , Control Management data) splits, and then packs the data of each RE (including IQ data and control data) into Ethernet frames. Since each Ethernet frame adds some fixed overhead of the Ethernet frame (such as a preamble), for an Ethernet switch, there are several RE base frames with several Ethernet frames, so the data of the pending data in the network.
  • the unicast transmission mode can be used if the amount needs to be less than or equal to the data carrying capacity of the network.
  • the REC judges whether each of the target REs that need to transmit data belongs to more than two local area networks, and if so, proceeds to step 806, and if not, proceeds to step 807.
  • the multicast transmission mode is used to form the to-be-sent data into an Ethernet frame.
  • the REC separates the to-be-sent data according to the division of the local area network, and divides the pending data belonging to the same local area network into a group, and all IQ data of the to-be-transmitted data belonging to the same local area network. And controlling data is extracted to form an Ethernet frame; respectively, each group of to-be-sent data is formed into an Ethernet frame corresponding to each local area network.
  • the local network can be divided into an A local area network and a B local area network, and the REC extracts the IQ data and the control data in all the pending data belonging to the A local area network, and packs them into an A Ethernet frame, and the REC passes the A Ethernet frame through the Ethernet switch.
  • the broadcast is performed in the A-LAN.
  • the REC extracts the IQ data and the control data in all the pending data belonging to the B-LAN, and packs it into a B-Ethernet frame, and broadcasts the B-Ethernet frame in the B-LAN through the Ethernet switch.
  • the M groups of the number of REs may be used, and the number of REs of each group is i.
  • each group may be further required. Both need to satisfy the following formula 2 to ensure that the data transmission of each group does not exceed the data carrying capacity of the transmission link; Equation 2: 3.84*10 6 ⁇ ;y.
  • the broadcast transmission mode is used to form the to-be-sent data into an Ethernet frame.
  • the REC directly extracts all the pending data, does not separate the control data and the control data in the sent data, and directly combines all the pending data into an Ethernet frame, and broadcasts through the Ethernet switch through the entire network.
  • the REC After the assembly of the Ethernet frame is completed, the REC sends the data that constitutes the Ethernet frame to the Ethernet switch, so that the Ethernet switch sends the Ethernet frame data to the corresponding RE according to the transmission address of the Ethernet frame data. After receiving the Ethernet frame data sent by the switch on the Ethernet network, the RE can recover the CPRI frame and obtain the CPRI data.
  • a REC communicates with N REs via an Ethernet switch for 10G Ethernet.
  • the CPRI rate is 5 rates provided by CPRI V4.2: 491.52Mbps, 983.04Mbps, 1966.08Mbps, 2457.6Mbps, 3932.16Mbps, 4915.2Mbps.
  • antenna signal is to be understood as a signal transmitted or received by the antenna.
  • a UMTS base station has 6 antennas, and a micro base station has only 1 antenna. Due to the different number of antennas used, it may not be suitable for antenna signals in CPRI. Number set and reserved transmission resources. For the unused antenna signal, 0 is transmitted between the baseband processing device REC and the transmitting and receiving units RE1, RE2, RE3. By removing unused resources from the CPRI data, the bandwidth required to transmit CPRI data is further reduced.
  • connection of CPRI data that originally needs 1228.8 Mbit/s can be transmitted through the Ethernet cable of 1 Gbit/s, and the CPRI connection of 2457.6 Mbit/s is transmitted through two Ethernet wires of 1 Gbit/s, through several 100 Mbit/
  • the Ethernet cable of s transmits a CPRI connection of 614.4 Mbit/s. If the CPRI data is transmitted via Ethernet packets, in order to connect the baseband processing unit REC with the transmitting and receiving units RE1, RE2, RE3, an existing Ethernet cable can be used.
  • An existing Ethernet connection is used as an example of the connection between the baseband processing unit REC and RE1, RE2, and RE3.
  • the configuration according to Fig. 10 is suitable for indoor applications, ie for the case where the transmitting and receiving units RE1, RE2, RE3 are located in the building.
  • the baseband processing unit REC is connected to the Ethernet switch ETHERNET SWITH via the Gigabit Ethernet cable GbE, while the transmitting and receiving units RE1, RE2, RE3 pass the two 100Mbit (megabit) Ethernet conductors 100MbE and the Ethernet switch ETHERNET S WITH connection. It is of course also possible to connect the transmitting and receiving units RE1, RE2, RE3 to the Ethernet switch ETHERNET SWITH via a different number of Ethernet conductors.
  • Indoor base stations typically only supply one wireless campus, where a wireless cell should be understood to be a specific area combined with a particular frequency band. Therefore, in an indoor base station, it is not necessary to transmit a large data rate from the transmitting and receiving units RE1, RE2, RE3, so that two 100 Mbit (megabit) Ethernet wires 100 MBE are sufficient for one transmitting and receiving unit RE1, RE2 or RE3 power supply.
  • the electrical transmission method is used in the 100Mbit Ethernet cable, and the connection has a range of up to several hundred meters. More than 4 buildings are cabled with 100Mbit Ethernet cables, so CPRI data can be transmitted using existing wires.
  • the REC can select the transmission mode according to various parameters of the current network, specifically: REC knows that the header and end data of the Ethernet frame is 26 bytes, and the redundancy of the Ethernet frame payload is added (frame The reserved bit is 36 bytes, and the frame interval of the Ethernet frame is 12 bytes.
  • the frame rate of the CPRI that meets the index requirement on the 1 OGbps Ethernet can be obtained as q, and the unicast transmission needs to meet the following requirements. Relationship:
  • the data amount of the data to be sent can be obtained by the table is greater than 10 G, so the framing mode is considered as In the broadcast or multicast mode, if the broadcast mode is used to implement the form, the complexity of the REC processing is small, but the network load is increased. If multicast is used, such as setting RE1 as a group, RE2 and RE3 are set to In another group, the network load is small, but the REC end is complicated to implement, so flexible framing can be performed according to the network load.
  • An embodiment of the REC of the present invention for performing the above-mentioned general public radio interface data transmission method.
  • An embodiment of the REC in the embodiment of the present invention includes:
  • the acquiring unit 901 is configured to acquire data volume of data to be sent that needs to be sent to the RE, where the to-be-sent data is general public radio interface data;
  • the selecting unit 902 is configured to determine whether the data volume of the to-be-transmitted data is greater than the data carrying capacity of the transmission link between the data sending end and the RE, and if not, use the unicast transmission mode to send the network to be sent.
  • the data constitutes an Ethernet frame. If yes, the data to be sent in the network is formed into an Ethernet frame by using a multicast transmission mode or a broadcast transmission mode.
  • the transmitting unit 903 is configured to send the foregoing Ethernet frame to the RE through the Ethernet switch.
  • the obtaining unit 901 in the embodiment of the present invention may include:
  • the data obtaining module 9011 is configured to acquire the number of REs in the network that need to perform data transmission, the frame data rate of the CPRI, and the frame reserved bits.
  • the data calculation module 9012 is configured to separately calculate a user plane data amount and a control plane data amount of the to-be-transmitted data according to the RE number and the frame data rate, calculate a redundant data amount of the CPRI frame converted into an Ethernet frame according to the frame reserved bit, and The amount of surface data, the amount of control plane data, and the amount of redundant data are added to obtain the amount of data of the data to be sent;
  • the capability acquisition module 9013 is configured to acquire data carrying capacity of the foregoing transmission link.
  • the selecting unit 902 in the embodiment of the present invention may include:
  • the first judging module 9021 is configured to determine whether the data volume of the to-be-transmitted data is greater than the data bearer capability, and if yes, trigger the first framing module 9022; if not, trigger the second judging module 9023; the first group of frame modules 9022, configured to perform IQ data and control data separation on the to-be-transmitted data in the network, and separate the separated IQ data and the control data into an Ethernet frame;
  • the second determining module 9023 is configured to determine whether the RE belongs to two or more local area networks, and if yes, trigger the second framing module 9024; if not, trigger the third framing module 9025; the second framing module 9024, configured to group the to-be-sent data belonging to the same local area network into a group, and the third group of frame modules 9025 is configured to directly form the to-be-sent data into an Ethernet frame.
  • the REC obtaining unit 901 acquires the data amount of the to-be-sent data that needs to be sent to the RE, and the to-be-sent data may be General Public Radio Interface (CPRI) data.
  • CPRI General Public Radio Interface
  • the foregoing RE may be one RE or multiple REs.
  • the REC in the embodiment of the present invention may send data to the REs within the control range of the REC, or may simultaneously send to another REC.
  • the RE within the control range sends data, as long as the target is obtained.
  • the network address of the standard RE can be.
  • the data volume of the to-be-transmitted data may be directly notified to the REC by the base station in the network, or may be calculated by the REC according to specific parameters of the current network scenario (eg, the number of REs, the data rate of the CPRI, etc.).
  • the amount of data of the to-be-transmitted data may be the sum of the amount of data included in the Ethernet frame that needs to be sent to each target RE. It should be noted that the REC is converted into an Ethernet frame according to the CPRI data. The amount of data calculates the amount of data of the above-mentioned data to be transmitted.
  • the capability acquiring module 9013 acquires the data carrying capacity of the transmission link; and the data acquiring module 9011 obtains the current data.
  • the parameter specifically includes: the number of REs NRE, the frame rate X of the CPRI, the frame reserved bit p, and the frame reserved bit p is a byte used for control management in the payload of the Ethernet frame.
  • the data calculation module 9012 calculates the user plane data amount and the control plane data amount of the to-be-sent data according to the number of REs NRE and the frame rate x of the CPRI, wherein the user plane data amount needs to calculate the total user of the NRE REs.
  • the CPRI frame is converted into the redundant data of the Ethernet frame according to the frame reserved bits.
  • the amount of redundant data may include a head-to-tail byte of an Ethernet frame, a byte of a frame reserved bit, and a frame interval byte.
  • the amount of user plane data, the amount of control plane data, and the amount of redundant data are Add, get the amount of data of the data to be sent.
  • the above parameters may be substituted into the formula 1 to obtain the data amount of the data to be sent. *15 x*10 9
  • l/3.84MHz is the base frame period of the CPRI
  • 26 is the head and tail byte of the Ethernet frame
  • 12 is the frame interval byte of the Ethernet frame
  • 8 is the conversion ratio of the number of bytes converted into the number of bits.
  • 15 is the byte of the IQ data in the Ethernet frame.
  • the selecting unit 902 selects an appropriate data transmission mode according to the data volume of the data to be sent and the data carrying capacity, which may be:
  • a determining module 9021 determines whether the data amount of the to-be-transmitted data is greater than the data carrying capability, and if so, triggers the first framing module 9022, and if not, triggers the second determining module 9023.
  • the first group of frame modules 9022 are in units of base frames of each RE, The IQ data and the control data of each RE in the to-be-sent data are split, and then the data of each RE (including IQ data and control data) is separately packaged into an Ethernet frame. Since each Ethernet frame adds some fixed overhead of the Ethernet frame (such as a preamble), for an Ethernet switch, there are several RE base frames with several Ethernet frames, so the data of the pending data in the network.
  • the unicast transmission mode can be used if the amount needs to be less than or equal to the data carrying capacity of the network. Referring to FIG. 2, the unicast transmission mode is a transmission mode for one-to-one data transmission between two network nodes.
  • the Ethernet switch After receiving the Ethernet frame framing in the unicast transmission mode, the Ethernet switch selects a transmission path according to the destination address marked in the Ethernet frame by using an existing unicast protocol, and transmits the Ethernet frame. Go to the specified RE.
  • the second determining module 9023 determines whether the RE belongs to more than two local area networks, and if so, triggers the second framing module 9024, and if not, triggers the third framing module 9025.
  • the second framing module 9024 separates the to-be-sent data according to the division of the local area network, and divides the to-be-sent data belonging to the same local area network into a group, and the pending data belonging to the same local area network.
  • All IQ data and control data are extracted to form an Ethernet frame; divided into A local area network and B local area network, the REC extracts the IQ data and control data in all the pending data belonging to the A local area network, and packs it into an A Ethernet frame.
  • the REC broadcasts the A-Ethernet frame in the A-LAN through the Ethernet switch.
  • the REC extracts the IQ data and control data from all the pending data belonging to the B-LAN, and packs it into a B-Ethernet frame.
  • B Ethernet frames are broadcast in the B-LAN.
  • M groups of the number of REs NRE may be determined, and the number of REs in each group is 1.
  • each group needs to satisfy the following formula 2 to ensure that the data transmission of each group does not exceed the data carrying capacity of the transmission link; ⁇ *15 * ⁇ x*10 9
  • the third group frame module 9025 directly extracts all the data to be sent, The control data and the control data are separated in the data to be sent, and all the data to be sent are directly composed into an Ethernet frame, and are broadcasted through the Ethernet switch in the entire network.
  • the broadcast transmission mode is a transmission mode in which a network node broadcasts a message to a surrounding network node, and an Ethernet switch in the network unconditionally copies and forwards a signal sent by any one of the network nodes, and all network nodes can Receiving an Ethernet frame containing all the information (regardless of whether the network node is needed or not), the network cost of the broadcast transmission mode can be very low because no path selection is required.
  • the transmission unit 903 After the completion of the assembly of the Ethernet frame for the data to be transmitted, the transmission unit 903 transmits the data constituting the Ethernet frame to the Ethernet switch, so that the Ethernet switch transmits the Ethernet frame data to the corresponding RE according to the transmission address of the Ethernet frame data.
  • An embodiment of the base station of the present invention for performing the foregoing method for transmitting data of the common public radio interface.
  • An embodiment of the base station in the embodiment of the present invention includes:
  • the REC described in the foregoing embodiment specifically includes: an acquiring unit, configured to acquire data volume of data to be sent that needs to be sent to the RE, where the to-be-sent data is general public radio interface data; and a selecting unit, configured to determine the to-be-supplied Whether the data amount of the data is greater than the data carrying capacity of the transmission link between the data transmitting end and the RE, and if not, using the unicast transmission mode to form the to-be-sent data in the network into an Ethernet frame, and if so, using the group
  • the broadcast transmission mode or the broadcast transmission mode forms the to-be-transmitted data in the network into an Ethernet frame; and the transmission unit is configured to send the foregoing Ethernet frame to the RE through the Ethernet switch and the CPRI.
  • the obtaining unit may include: a data acquiring module, configured to acquire a quantity of REs in the network that need to perform data transmission, a frame data rate of the CPRI, and a frame reserved bit; and a data calculation module, configured to respectively determine the number of REs and the frame data rate Calculating the amount of user plane data and control plane data of the data to be sent, calculating the amount of redundant data converted from the CPRI frame to the Ethernet frame according to the frame reserved bits, and adding the user plane data amount, the control plane data amount, and the redundant data amount And obtaining a data amount of the to-be-transmitted data; and a capability acquiring module, configured to acquire a data carrying capability of the foregoing transmission link.
  • a data acquiring module configured to acquire a quantity of REs in the network that need to perform data transmission, a frame data rate of the CPRI, and a frame reserved bit
  • a data calculation module configured to respectively determine the number of REs and the frame data rate Calculating the amount of user plane data and control plane data of the data to
  • the selecting unit may include: a first determining module, configured to determine whether the data volume of the to-be-transmitted data is greater than the data carrying capability, and if yes, triggering the first framing module, and if not, triggering the second determining module
  • the first group of frame modules is configured to perform IQ data and control data separation on the to-be-transmitted data in the network, and separate the separated IQ data and the control data into an Ethernet frame
  • a second determining module configured to determine whether the RE is It belongs to two or more local area networks, and if so, it triggers
  • the second framing module if not, triggers the third framing module;
  • the second framing module is configured to group the to-be-sent data belonging to the same local area network into groups, and respectively group the to-be-sent data of each group into each local area network The corresponding Ethernet frame.
  • the third framing module is configured to directly form the to-be-sent data into an Ethernet frame.
  • the RE used for data transmission with the above REC; wherein, the RE may include multiple. Specifically, after receiving the Ethernet frame data sent by the switch on the Ethernet network, the RE can recover the CPRI frame to obtain the CPRI data.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.
  • the units described as separate components may or may not be physically separate, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.
  • the integrated unit if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium.
  • the technical solution of the present invention may contribute to the prior art or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. , including a number of instructions to make a computer device (which can be a personal computer, a server, Or a network device or the like) performing all or part of the steps of the method of the various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a removable hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

Abstract

La présente invention concerne un procédé et un dispositif de transmission de données destinés à une interface hertzienne publique commune. Un tel procédé consiste d'abord à acquérir le volume de données correspondant aux données à envoyer à l'équipement radio ou "RE" (Radio Equipment), les données à envoyer étant des données d'interface radio publique commune. Le procédé consiste ensuite à rechercher si le volume de données considéré excède les possibilités des vecteurs de données d'une liaison de transmission entre une extrémité envoyeuse de données et l'équipement radio. Si ce n'est pas le cas, on prend les données à envoyer et on les transforme en trames Ethernet pour mode de transmission à destinataire unique. Si c'est le cas, on prend les données à envoyer et on les transforme en trames Ethernet pour le mode de transmission à destinataires multiples. Le procédé consiste enfin à envoyer les trames Ethernet à l'équipement radio par l'intermédiaire d'un commutateur Ethernet.
PCT/CN2011/079811 2011-09-19 2011-09-19 Procédé et dispositif de transmission de données pour interface hertzienne publique commune WO2013040740A1 (fr)

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PCT/CN2011/079811 WO2013040740A1 (fr) 2011-09-19 2011-09-19 Procédé et dispositif de transmission de données pour interface hertzienne publique commune

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105162868A (zh) * 2015-09-18 2015-12-16 华中师范大学 一种教师端与学生端之间的可靠数据传输方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109428669B (zh) * 2017-08-22 2021-04-27 深圳市中兴微电子技术有限公司 一种实现数据传输处理的方法及装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101005450A (zh) * 2006-12-15 2007-07-25 上海华为技术有限公司 通用公共无线接口数据传输方法及其设备和系统
CN101369972A (zh) * 2008-10-17 2009-02-18 华为技术有限公司 业务数据传输方法、系统及设备
CN101754481A (zh) * 2008-12-10 2010-06-23 中兴通讯股份有限公司 一种控制多模无线设备切换运行模式的方法及系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE0302596D0 (sv) * 2003-09-30 2003-09-30 Ericsson Telefon Ab L M Improvments in or relating to base stations
CN101326790A (zh) * 2005-12-13 2008-12-17 艾利森电话股份有限公司 用于经由不同承载类型分发内容的技术
GB2455702B (en) * 2007-11-29 2012-05-09 Ubidyne Inc A method and apparatus for autonomous port role assignments in master-slave networks

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101005450A (zh) * 2006-12-15 2007-07-25 上海华为技术有限公司 通用公共无线接口数据传输方法及其设备和系统
CN101369972A (zh) * 2008-10-17 2009-02-18 华为技术有限公司 业务数据传输方法、系统及设备
CN101754481A (zh) * 2008-12-10 2010-06-23 中兴通讯股份有限公司 一种控制多模无线设备切换运行模式的方法及系统

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105162868A (zh) * 2015-09-18 2015-12-16 华中师范大学 一种教师端与学生端之间的可靠数据传输方法
CN105162868B (zh) * 2015-09-18 2017-03-08 华中师范大学 一种教师端与学生端之间的可靠数据传输方法

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