WO2008071131A1

WO2008071131A1 - A common public radio interface data transmission method and the device and system thereof

Info

Publication number: WO2008071131A1
Application number: PCT/CN2007/071244
Authority: WO
Inventors: Shenghua Bao
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2006-12-15
Filing date: 2007-12-14
Publication date: 2008-06-19
Also published as: CN100438506C; CN101005450A

Abstract

A CPRI interface data transmission method and the device and system thereof, include that: after a transmitter adjusts CPRI data to frames adapting to Ethernet transmission (510), the transmitter transmits the frames via Ethernet line (520); a receiver receives the frames adapting to Ethernet transmission via Ethernet line (530), adjusts the frames adapting to Ethernet transmission to CPRI frames, and obtains CPRI data (540). Before transmitting a CPRI frame of CPRI data, the frame head is transmitted by IQ bandwidth. Between different CPRI frames, the inter frame gap is transmitted by IQ bandwidth. The system applying the method and device of the invention can reduce the transmission cost of CPRI data.

Description

Universal public wireless interface data transmission method, device and system thereof

Technical field

The present invention relates to the field of wireless communications, and more particularly to a general public wireless interface data transmission method, apparatus and system. Background of the invention

The Common Public Radio Interface (CPRI) specification is a specification published by a number of companies in the industry for the key interfaces of mobile communication wireless base stations. The CPRI specification is a common specification for this critical interface in the industry and provides a common set of key internal interfaces for base stations. CPRI is responsible for defining the key internal interfaces of the wireless base station between the Radio Equipment Controller ("REC") and the Radio Equipment ("RE"). The goal of the standard was to create an open market for cellular base stations, which drastically reduced the enormous development effort and cost associated with long-term base station design.

The CPRI industry collaboration focuses on a design for a third-generation (3rd Generation) mobile communication system base station that divides the wireless base station into a wireless portion and a control portion by assigning a new interface. This allows all parts of the base station to better benefit from technological advances in their respective fields.

To benefit the entire wireless industry, CPRI specifications are available through open channels. For network operators, the key benefit is to get a richer line of wireless base station products and adapt to all network deployment plans with shorter time to market. The CPRI specification also enables base station manufacturers and component suppliers to focus on their core competencies related research and development activities. The CPRI specification can also be used for new architectures and is not limited to module scales or predefined functional partitions. The CPRI industry collaboration not only enables base station manufacturers to focus on the development of core technology capabilities, but also to use equipment manufactured by different manufacturers. The main benefits of the specification are the rapid development of new technologies introduced and enabling base station manufacturers to offer operators a richer product range while bringing products to market in less time. At the same time, operators will benefit from a wider range of product choices, more flexible solutions and further improvements in network deployment efficiency.

CPRI's companies will work together to create a competitive mobile network component industry and benefit the entire wireless industry by opening up CPRI interfaces. CPRI will complement existing standardization organizations, such as the 3rd Generation Partnership Project (3rd Generation Partnership Project), which will be used to develop wireless base station products for mobile systems. in.

For 3G mobile communication systems, such as Wideband Code Division Multiple Access (WCDMA), the CPRI specification is used to implement the primary base station and the radio remote unit (RRE). The first and second layer (L1, L2) communication protocols. Based on the CPRI specification, the versatility of the interface between the primary base station and the RRU can be improved, and the interconnection between the primary base station and the RRU of different vendors is also facilitated.

The RRU is an outdoor RRU developed according to the 3GPP R99/R4 FDD protocol, and functions as an RRU of the primary base station. The RRU can connect to the primary base station through an optical interface or an electrical interface, and share the baseband processing and the primary control clock resource of the primary base station. The networking mode, transmission distance, and transmission bandwidth are determined according to the placement location of the primary base station and the RRU, construction cost, and fiber resources. For long-distance drawing (greater than 500m), the macrocell base station can be built by pulling out when the fiber is easy to obtain or the laying cost is low.

The main base station and the RRU are connected by optical fibers to realize the transmission of the baseband IQ data. The schematic diagram of the optical fiber remote solution is shown in FIG. 1 . Figure 2 shows the basic frame structure of 122.88 Mbit/s in the CPRI protocol. The CPRI basic frame is 16 (bit width) X 16 (16 clock cycles). There are two mapping methods for IQ data. In the compact position mode, all AXCs are placed next to the IQ block, where A is the number of antennas and C is the number of carriers.

In the flexible mode, for the downstream direction, the number of bits per antenna is 2 ( IQ ) x m (downstream IQ data bit width, unit bit) = 2m bit. The basic frame format is shown in Figure 3. As can be seen from the figure, in the case of 1.2288 Gbit/s, the maximum supported A x C number in the downlink direction is: ( 32 - 2 ) X 8/( 2 X m ) or 120/m The value is rounded down. For example, if m = 14bit, the maximum number of A x Cs supported in the downstream direction is 8. For the upstream direction, the number of bits per antenna is 2 (double sample) 2 ( IQ ) η (upstream IQ data bit width, unit bit) = 4n bit. In the case of 1.2288 Gbit/s, the maximum number of A χ C supported in the uplink direction is:

( 32 - 2 ) *8/ ( 4 * η ) is the value after 60/η, the basic frame format is shown in Figure 4. In the figure, the line rate is 1.2288 Mbit/s. When n = 6, the upstream direction Supports up to 10 A χ C structure diagrams.

Although the CPRI data transmission between the primary base station and the RRU can be realized by the optical fiber extension, the optical module is required to be connected to the device, so the equipment cost is high, especially when the short-distance transmission is performed, the laying cost is high, and the construction is difficult. Summary of the invention

Embodiments of the present invention provide a CPRI data transmission method, apparatus, and system thereof, which reduce transmission cost of CPRI data.

In one aspect, a CPRI transmission method provided by an embodiment of the present invention includes the following steps: adjusting a CPRI frame to a frame adapted for Ethernet transmission; transmitting a frame adapted to Ethernet transmission on an Ethernet network line.

The sending device provided by the embodiment of the present invention includes: an adjusting module, configured to adjust a CPRI frame to a frame adapted for Ethernet transmission; and a sending module, configured to send a frame adapted for Ethernet transmission on an Ethernet network line. Embodiments of the present invention provide a primary base station including the above-described transmitting device.

Embodiments of the present invention provide an RRU including the above-described transmitting device.

On the other hand, the CPRI data transmission method provided by the embodiment of the present invention includes the following steps: receiving a frame adapted to an Ethernet transmission on an Ethernet network line; adjusting a frame adapted to the Ethernet transmission to a CPRI frame to obtain CPRI data.

The receiving device provided by the embodiment of the present invention includes: a receiving module, configured to receive a frame adapted to an Ethernet transmission on an Ethernet network line; and a data acquiring module, configured to adjust a frame adapted to the Ethernet transmission to a CPRI frame, Obtain CPRI data.

An embodiment of the present invention provides a primary base station including the above receiving device.

Embodiments of the present invention provide an RRU including the above receiving device.

The CPRI data transmission system provided by the embodiment of the present invention includes: a primary base station including the above-mentioned transmitting device and an RRU including the above receiving device.

The CPRI data transmission system provided by the embodiment of the present invention includes: an RRU including the foregoing transmitting device, and a primary base station including the foregoing receiving device.

Compared with the prior art, the main difference between the embodiments of the present invention and the effect thereof is as follows: After the transmitter adjusts the CPRI data to a frame adapted for Ethernet transmission, it transmits on an Ethernet network cable (such as a twisted pair), and the receiving end The adjusted frame is received on the Ethernet network cable, and the adjusted frame is restored to the CPRI frame according to the adjustment manner corresponding to the transmitting end, and the CPRI data is obtained. This allows CPRI data to be transmitted over lower twisted pairs, reducing the cost of transmission of CPRI data. Moreover, due to the difficulty in construction of the twisted pair, the damage to the building is small, and the laying cost is very low, so it has great engineering construction advantages.

Since the frame transmitted on the Ethernet network line must have a frame header and a frame gap, the frame header is transmitted through the IQ bandwidth before transmitting the CPRI data of a CPRI frame; the frame is transmitted through the IQ bandwidth between different CPRI frames. The gap enables the transmission of CPRI data over the Ethernet network. At an online rate of 1.2288 Gbps, the length of a CPRI superframe is 8192 bytes, which is just less than the maximum basic frame length of 10 KB supported by the Gigabits Ethernet (Gigabits Ethernet, "GE") physical layer chip. The superframe in the CPRI protocol is a basic frame supported by the GE physical layer chip, so that the invention solution can be implemented with less modification to the existing protocol. If the superframe length of the CPRI protocol is greater than the maximum basic frame length supported by the Ethernet physical layer chip, the superframe segmentation of the CPRI protocol is such that each segment length is less than or equal to the maximum basic frame supported by the physical layer chip of the Ethernet network. The length, thus enabling the inventive solution to be achieved.

The transmitting end and the receiving end are respectively a primary base station and an RRU, or are respectively an RRU and a primary base station, that is, an Ethernet network cable can be connected between the primary base station and the RRU, and the optical fiber is not required to be connected, thereby realizing The digital information between the primary base station and the RRU is transmitted over short distances on the unshielded twisted pair, thereby reducing the transmission cost of the CPRI data. BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a fiber optic remote solution in the prior art.

2 is a schematic diagram of a basic frame structure of a 122.88 Mbit/s CPRI protocol in the prior art. FIG. 3 is a schematic structural diagram of downlink CPRI basic frame data in the prior art.

4 is a schematic diagram showing the structure of an uplink CPRI basic frame data in the prior art.

Figure 5 is a flow chart showing a CPRI data transmission method in accordance with a first embodiment of the present invention.

Figure 6 is a diagram showing the adjustment of the CPRI superframe format according to the first embodiment of the present invention.

Fig. 7 is a timing chart showing the GMII format according to the first embodiment of the present invention.

Figure 8 is a diagram showing the adjustment of the CPRI superframe format according to the second embodiment of the present invention. Mode for carrying out the invention

In order to make the technical solutions and advantages of the present invention more clear, the present invention will be described below with reference to the accompanying drawings. Further details are described.

In an embodiment of the present invention, the transmitting end, such as the primary base station, adjusts the CPRI frame to a frame adapted for Ethernet transmission, and then sends the data to the RRU on the Ethernet network line; the RRU receives on the Ethernet network line (such as a twisted pair) Adapted to the frame transmitted by Ethernet, the frame adapted to the Ethernet transmission is adjusted to the CPRI frame to obtain the CPRI data. The sender adjusts the CPRI frame by: transmitting the frame header through the IQ bandwidth before transmitting the CPRI data of the CPRI frame; transmitting the CPRI data of the CPRI frame; and transmitting the frame gap through the IQ bandwidth between different CPRI frames. Therefore, the RRU with a twisted pair can be extended by using a mature 100M or Gigabit Ethernet physical layer chip with interface conversion logic.

The following is a detailed description of the first embodiment of the present invention. The present embodiment relates to a CPRI data transmission method. In this embodiment, the sender and the receiver are the primary base station and the RRU, respectively, or the RRU and the primary base station, respectively. Figure 5 shows.

In step 510, the sender adjusts the CPRI frame to a frame adapted for Ethernet transmission. Specifically, the maximum basic frame supported by the GE physical layer chip is 10kB, and the online frame rate is 1.2288Gbps. The length of a CPRI superframe is 8192 bytes, which is just less than 10KB. Therefore, the superframe in the CPRI protocol is a basic frame of GE. Because the sender needs to implement a Gigabyte Media Independent Interface (Gigabyte Media Independent Interface), which is a Gigabyte Media Independent Interface (Gigabyte Media Independent Interface), and a Gigabit Media Independent Interface that saves the number of pins ( Reduced pin-count version of The interface of the Gigabit Media Independent Interface is called "RGMII". Therefore, in order to support the format requirements of the GE interface, the CPRI superframe needs to be adjusted to the frame for Ethernet transmission, so that the CPRI data can be transmitted on the GE interface.

Since Ethernet transmission is based on basic frame transmission, the basic structure of the basic frame of a physical layer is the frame header (7 0x55+1 0xD5) + data + frame gap (Inter Package Gap, the cylinder is called "IPG";) , where IPG is at least 96 Bit Time, ie 12 Bytes. That is to say, in the frame structure of the Ethernet, the header and the IPG are indispensable. Therefore, this embodiment needs to sacrifice the IQ bandwidth to implement the GE-based CPRI data transmission.

First, the bandwidth is analyzed by using the CPRI superframe as the transmission frame of the GE. In this embodiment, the clock is 61.44 MHz, and the upstream AXC = 2 (double sampling) 2 (IQ) χ 6 (data bit width) bits. That is, 24 bits, and one AXC = 2 (IQ) 14 (data bit width) bit, that is, 28 bits, is taken as an example for description.

In the 1.2288 Gbps CPRI bandwidth, the control plane bandwidth is: 2 bytes χ 8 bits 256 256 (chip chip) χ 150 (superframe) 100 (10ms) = 61.44Mbps; if the superframe is adjusted to adapt to Ethernet transmission The frame, ie the frame of GE, the frame header and IPG of the GE frame will occupy the IQ bandwidth (20 bytes per superframe), and the occupied bandwidth is: 20 bytes χ 8 bits X 150 (super frame) X 100 ( 10ms ) = 2.4Mbps; Excluding the control plane and GE header and IPG bandwidth, the bandwidth that can be used to transmit IQ data in the 1.2288G CPRI bandwidth is: 1228.8 M ( 4/5 ) - 61.44M - 2.4M = 919.2Mbps. Therefore, the maximum number of A x C supported in the upstream direction is 9: 919.2M/[2 (double sampling) 2 ( IQ ) χ 6 (data bit width) X 256 ( chip ) 150 (superframe) χ 100 ( 10ms ) ] = 9 (rounded down value); The maximum number of A x C supported in the downstream direction is 8: 919.2M/[2 ( IQ ) 14 (data bit width) X 256 ( chip ) 150 (superframe ) χ 100 ( 10ms ) ] = 8 (rounded down value).

Then, the above-mentioned row direction A x C number is 6 as an example, and the adjustment manner of the CPRI frame is described. When the number of A x C in the uplink direction is 6, the modification to the CPRI protocol format is minimal, as shown in FIG. 6 . The slash portion is a 2-byte control word; the grid portion is a frame header of an 8-byte adjusted frame; and the horizontal line portion is an IPG of a 12-byte adjusted frame. Of course, the IPG can also be larger than 12 bytes, but in order to save IQ bandwidth as much as possible, the IPG in this embodiment is 12 bytes. That is to say, before transmitting CPRI data of a CPRI frame, the frame header is transmitted through the IQ bandwidth; between different CPRI frames, the IPG is transmitted through the IQ bandwidth. Specifically, as shown in FIG. 6, one superframe is a GE frame, and the IQ position of the first 8 bytes of the first chip in the superframe is occupied by the frame header, so the corresponding IQ position is shifted backward. 8 byte position. The last 10 bytes of the last chip in the superframe plus the BC50 position of the first chip of the next superframe (ie the first two bytes of the first chip), a total of 12 bytes of space used to transport the IPG . It can be seen that the CPRI data can be transmitted on the Ethernet network line by adjusting the CPRI frame.

Next, proceeding to step 520, the transmitting end transmits the adjusted frame on the Ethernet network line. Specifically, the basic frame transmission timing of the GE physical layer interface GMII specified in the 802.3 protocol is as shown in FIG. 7, where TXC/RXC is a transmission clock/reception clock; TXEN/RXDV transmission enable/receive effective indication; TXD/ RXD is the transmit data/receive data; TXER/RXER is the transmit error indication/receive error indication. The transmitting end transmits the adjusted frame in the GMII, and when transmitting the IPG, sets the transmission enable signal TXEN/RXDV in the transmission timing of the GMII to be invalid, that is, pulls down the TXEN/RXDV in the transmission timing of the GMII, as shown in FIG. 6. Shown.

Since the CPRI data is transmitted on a lower Ethernet cable (such as a twisted pair), the optical module is avoided when the primary base station and the RRU are connected, so that the transmission cost of the CPRI data can be reduced. Moreover, compared with the traditional fiber-optic remote approach, the twisted pair construction is less difficult, the damage to the building is small, the laying cost is low, and the engineering construction advantage is great. On the other hand, the next focus of operator investment is the solution for indoor coverage. The main potential business of 3G in developed countries is data service. The proportion of data services occurring indoors is 4艮, and the demand cannot be met through outdoor coverage. The use of Pico (Pico-Base Station) RRU and the use of the building's cabling system is an effective solution for indoor coverage. Due to the advantages of cheap and easy construction of twisted pair cables, it has been widely used in building integrated wiring systems. Therefore, the interconnection of the RRU and the primary base station through the twisted pair can realize the indoor coverage of the building at a lower cost by utilizing the engineering advantages of the twisted pair.

Next, proceeding to step 530, the receiving end receives the adjusted frame on the Ethernet network line. By After the CPRI frame is adjusted to the frame adapted for Ethernet transmission on the transmitting end, it is sent to the receiving end on the Ethernet network line. Therefore, the receiving end needs to receive the adjusted frame on the Ethernet network line accordingly.

Next, proceeding to step 540, the receiving end restores the adjusted frame to a CPRI frame according to an adjustment manner corresponding to the transmitting end, to obtain CPRI data. The specific adjustment may be: removing the frame header transmitted by the IQ bandwidth in the adjusted frame; removing the frame gap transmitted by the IQ bandwidth between the different adjusted frames; restoring the content with the frame header and the frame gap removed to the CPRI frame.

When the transmitting end is the primary base station, the receiving end is the RRU. When the transmitting end is the RRU, the receiving end is the primary base station. It can be seen that there is no need to use a relatively high-cost optical fiber to connect between the primary base station and the RRU. The cheaper twisted pair transmits CPRI data, which realizes short-distance transmission of digital information between the primary base station and the RRU on the unshielded twisted pair, thereby reducing the transmission cost of the CPRI data.

In this embodiment, the length of a CPRI superframe is 8192 bytes, which is just less than 10 KB of the maximum basic frame length supported by the GE physical layer chip. Therefore, the superframe in the CPRI protocol is supported by the GE physical layer chip. The basic frame enables the present embodiment to be implemented with minor changes to existing protocols. It should be noted that, if the superframe length of the CPRI protocol is greater than the maximum basic frame length supported by the GE physical layer chip, the superframe segmentation of the CPRI protocol is performed, so that each segment length is less than or equal to the Ethernet physical layer chip support. The maximum basic frame length allows the present embodiment to be implemented.

The second embodiment of the present invention relates to a CPRI data transmission method. This embodiment is substantially the same as the first embodiment except that in the first embodiment, the number of A x C in the preceding row direction is six. The adjustment of the CPRI frame will be described. In the present embodiment, the adjustment of the CPRI frame will be described by taking the number of AXCs in the above-mentioned row direction as nine.

Specifically, if the number of A x C in the uplink direction is 9, that is, the IQ of A x C in each chip is: 9 X 2 (double sampling) X 2 ( IQ ) X 6 (data bit width) Bit = 216 Bit = 27 Bytes, that is, the number of data bits to be transmitted per chip is 216 bits, which is 27 bytes. When the CPRI frame is adjusted, the IQ position of the first 8 bytes of the first chip of a superframe is occupied by the frame header, so the corresponding IQ position is shifted back by 8 bytes. Therefore, the chip only has The 22-byte IQ location can be used to transmit CPRI data, less than the 27-byte CPRI data that the chip needs to transmit. Therefore, the sender must transmit the remaining 5 bytes (27 - 22) of CPRI data across the chip, as shown in Figure 8. Similarly, since the last 10 bytes of the last chip of a superframe are used to transmit the IPG, the 253th to 256th chips of a superframe must transmit CPRI data across the chip, as shown in Figure 8.

A third embodiment of the present invention relates to a CPRI data transmission system including a transmitting device and a receiving device.

The sending device includes an adjustment module and a sending module. The adjustment module adjusts the CPRI frame to a frame suitable for Ethernet transmission; the transmitting module transmits the frame adapted for Ethernet transmission on an Ethernet network cable (such as a twisted pair). In this way, CPRI data can be transmitted over a lower twisted pair, reducing the cost of transmitting CPRI data. Moreover, due to the small construction difficulty of the twisted pair, the damage to the building is small, and the laying cost is as low as 4, so it has the advantage of engineering construction.

The adjustment module adjusts the CPRI frame in the following manner: Before transmitting the CPRI data of a CPRI frame, the frame header is transmitted through the IQ bandwidth, and the CPRI data of the CPRI frame is transmitted, and the IPG is transmitted through the IQ bandwidth between different CPRI frames. When the transmitting module transmits an IPG on the Ethernet network cable, the transmission enable signal in the transmission timing of the Ethernet interface is disabled. It can be seen that the CPRI data is transmitted on the Ethernet network line by adjusting the CPRI frame.

When the online rate is 1.2288 Gbps, the length of a CPRI superframe is 8192 bytes, which is just less than the maximum basic frame length supported by the GE physical layer chip by 10 KB. Therefore, the superframe in the CPRI protocol is supported by the GE physical layer chip. A basic frame enables this embodiment to be implemented with minor changes to existing protocols. If the CPRI protocol is super If the frame length is greater than the maximum basic frame length supported by the Ethernet physical layer chip, the superframe segmentation of the CPRI protocol is performed, so that the length of each segment is less than or equal to the maximum basic frame length supported by the physical layer chip of the Ethernet network, so that the embodiment is Achieved.

It is worth mentioning that in order to save IQ bandwidth as much as possible, the IPG is set to 12 bytes, the last 10 bytes of the last chip of the previous adjusted frame and the first of the next adjusted frame. The first 2 bytes of the chip are used together to transmit the IPG. If the CPRI data to be transmitted by one chip in the CPRI frame is larger than the CPRI data that the chip can transmit after the adjustment, the transmitting module transmits the CPRI data to be transmitted across the chip.

A receiving module and a data acquiring module are included in the receiving device. The receiving module receives the CPRI frame adapted to the Ethernet transmission on the Ethernet network line; the data acquisition module adjusts the frame adapted to the Ethernet transmission to the CPRI frame to obtain the CPRI data.

In this embodiment, the Ethernet is a GE, and the sending device and the receiving device are respectively a primary base station and an RRU, or are respectively an RRU and a primary base station, so that an Ethernet network cable can be connected between the primary base station and the RRU without using a cost. The high optical fiber is connected to realize short-distance transmission of digital information between the primary base station and the RRU on the unshielded twisted pair, thereby reducing the transmission cost of the CPRI data.

In summary, in the embodiments of the present invention, the transmitting end adjusts the CPRI data to be adapted to the frame transmitted by the Ethernet, and then sends the signal on the Ethernet network cable (such as a twisted pair), and the receiving end is on the Ethernet network cable. Receive frames adapted for Ethernet transmission, and adjust frames adapted for Ethernet transmission to CPRI frames to obtain CPRI data. In this way, CPRI data can be transmitted over cheaper twisted pairs, reducing the transmission cost of CPRI data. Moreover, due to the small construction difficulty of the twisted pair, the damage to the building is small, and the laying cost is very low, so it has a great engineering construction advantage.

Since the frame transmitted on the Ethernet network line must have a frame header and a frame gap, before transmitting the CPRI data of a CPRI frame, the frame header is transmitted through the IQ bandwidth; in different CPRIs. Between frames, the frame gap is transmitted through the IQ bandwidth, and the transmission of CPRI data on the Ethernet network line is realized.

At an online rate of 1.2288 Gbps, the length of a CPRI superframe is 8192 bytes, which is just less than the maximum basic frame length of 10 KB supported by the Gigabits Ethernet (Gigabits Ethernet, "GE") physical layer chip. The superframe in the CPRI protocol is a basic frame supported by the GE physical layer chip, so that the invention solution can be implemented with less modification to the existing protocol. If the superframe length of the CPRI protocol is greater than the maximum basic frame length supported by the Ethernet physical layer chip, the superframe segmentation of the CPRI protocol is such that each segment length is less than or equal to the maximum basic frame supported by the physical layer chip of the Ethernet network. The length, thus enabling the inventive solution to be achieved.

The transmitting end and the receiving end are respectively a primary base station and an RRU, or are respectively an RRU and a primary base station, that is, an Ethernet network cable can be connected between the primary base station and the RRU, and the optical fiber is not required to be connected, thereby realizing The digital information between the primary base station and the RRU is transmitted over short distances on the unshielded twisted pair, thereby reducing the transmission cost of the CPRI data.

While the invention has been illustrated and described with reference to the preferred embodiments embodiments The spirit and scope of the invention.

Claims

Claim

A general public radio interface data transmission method, comprising: adjusting a general public radio interface CPRI frame to a frame adapted for Ethernet transmission; transmitting the frame adapted to an Ethernet transmission on an Ethernet network line .

2. The universal public radio interface data transmission method according to claim 1, wherein the adjusting the CPRI frame to a frame adapted for Ethernet transmission comprises:

Transmitting a frame header through the IQ bandwidth before transmitting CPRI data of a CPRI frame; transmitting CPRI data of the CPRI frame;

The frame gap is transmitted through the IQ bandwidth between different CPRI frames.

3. The universal public radio interface data transmission method according to claim 2, further comprising:

When the frame gap is transmitted on the Ethernet network line, the transmission enable signal in the transmission timing of the Ethernet interface is disabled.

4. The universal public radio interface data transmission method according to claim 2, wherein the frame gap is at least 12 bytes.

The general public radio interface data transmission method according to claim 2, wherein the frame gap is 12 bytes;

The transmitting the frame gap through the IQ bandwidth includes: a last 10 bytes of a last chip of the frame adapted to the Ethernet transmission and a first 2 chips of the first chip of the frame adapted to the Ethernet transmission The bytes are used together to transmit the frame gap.

6. The universal public radio interface data transmission method according to claim 2, wherein a CPRI data to be transmitted in one chip of the CPRI frame is larger than a chip that is adapted to an Ethernet transmission frame. CPRI data;

The CPRI data of the transmitted CPRI frame includes: The CPRI data of the CPRI frame is transmitted across the chips in the frame transmitted by the Ethernet.

7. The universal public radio interface data transmission method according to claim 1, wherein the CPRI frame is a superframe of a CPRI protocol.

8. The universal public radio interface data transmission method according to claim 7, wherein the frame adapted for Ethernet transmission is a maximum basic frame length supported by an Ethernet physical chip;

The CPRI data of the transmitted CPRI frame includes:

If the superframe length of the CPRI protocol is greater than the maximum basic frame length supported by the Ethernet physical layer chip, the superframe segment transmission of the CPRI protocol is less than or equal to the maximum supported by the physical layer chip of the Ethernet network. Basic frame length.

A general public radio interface data transmission method, comprising: receiving a frame adapted to an Ethernet transmission on an Ethernet network line;

The frame adapted to the Ethernet transmission is adjusted to a CPRI frame to obtain CPRI data.

10. The universal public radio interface data transmission method according to claim 9, wherein the adjusting the frame adapted to the Ethernet transmission to the CPRI frame comprises:

Removing a frame header transmitted through the IQ bandwidth in the frame adapted to the Ethernet transmission; removing a frame gap transmitted by the IQ bandwidth between frames adapted to the Ethernet transmission; removing the content of the frame header and the frame gap Revert to the CPRI frame.

A transmitting device, comprising:

An adjustment module, configured to adjust a CPRI frame to a frame adapted for Ethernet transmission; and a sending module, configured to send the frame adapted for Ethernet transmission on an Ethernet network line.

12. The transmitting device according to claim 11, wherein the adjusting module adjusts the CPRI frame to a frame adapted for Ethernet transmission by:

Transmitting a frame header through an IQ bandwidth before transmitting CPRI data of a CPRI frame; transmitting CPRI data of the CPRI frame; The frame gap is transmitted through the IQ bandwidth between different CPRI frames.

The transmitting device according to claim 12, wherein the transmission enable signal in the transmission module transmission timing is invalid.

A master base station, comprising the transmitting device according to any one of claims 11 to 13.

A radio frequency remote unit, comprising the transmitting device according to any one of claims 11 to 13.

16. A receiving device, comprising:

a receiving module, configured to receive a frame adapted to the Ethernet transmission on the Ethernet network line; and a data acquiring module, the frame adapted to the Ethernet transmission is adjusted to a CPRI frame, and the CPRI data is obtained.

The receiving device according to claim 16, wherein the data acquisition module adjusts a frame adapted to Ethernet transmission to a CPRI frame by:

A master base station, comprising the receiving device according to claim 16 or 17.

A radio frequency remote unit, comprising the receiving device according to claim 16 or 17.

A general public radio interface data transmission system, comprising the primary base station of claim 14 and the radio frequency remote unit of claim 19.

A general public radio interface data transmission system, comprising the radio frequency remote unit of claim 15 and the main base station of claim 18.