CN102149104A - RRU (remote radio unit) microwave transmission transformation method and device as well as RRU microwave transmission system - Google Patents

Abstract

An RRU microwave transmission conversion method, an RRU microwave transmission conversion device, and an RRU microwave transmission system. The solution of the present invention identifies and extracts the first relevant information data of the RRU equipment through interconnection with the RRU equipment, and the first relevant information data includes the control word , IQ data, and map the first relevant information data of the RRU protocol or the data frame of the RRU protocol format to the data frame of the microwave protocol format to realize the interconnection and intercommunication with the microwave equipment, thereby realizing the connection between the RRU and the microwave equipment In the case of insufficient optical fiber resources, the solution of the present invention can combine optical fiber transmission and microwave transmission for signal transmission, which can meet the needs of wireless signal coverage in the case of insufficient optical fiber resources.

Description

RRU microwave transmission conversion method, device and RRU microwave transmission system

technical field

The invention relates to the technical field of communication, in particular to an RRU microwave transmission conversion method, an RRU microwave transmission conversion device and an RRU microwave transmission system.

Background technique

With the increasing development of mobile communication technology, the number of mobile communication users also increases sharply, which makes operators have to expand the mobile communication system to meet the communication needs of users. One of the existing mobile communication transmission methods is to use optical fiber for signal transmission. Figure 1 shows a schematic diagram of the application of using optical fiber to interconnect devices for signal transmission. As shown in Figure 1, in the existing In the solution, the REC device (master device) is connected to the RE device (slave device) through an optical fiber, and the transmission of signal data is realized through the communication between the REC device and the RE device. However, this communication method relies on the laying of optical fibers. In some coverage scenarios where optical fiber resources are scarce, such as mountainous areas, disaster sites, communities without optical fiber resources, etc., the signal cannot be covered, so this communication method cannot be used. for signal transmission.

Contents of the invention

In view of the problems existing in the above-mentioned prior art, the object of the present invention is to provide an RRU microwave transmission conversion method, an RRU microwave transmission conversion device and an RRU microwave transmission system, which can realize the seamless connection between RRU equipment and microwave equipment, It can meet the needs of wireless signal coverage in the case of insufficient optical fiber resources.

To achieve the above object, the present invention adopts the following technical solutions:

A method for RRU microwave transmission conversion, comprising steps:

Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, mapping the first relevant information data to the data frames in the downlink microwave protocol format and then transmitting them, The first relevant information data includes control words and IQ data;

Receive the data frame of the uplink microwave protocol format, extract the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and send the second related information data to the data packet of the uplink RRU protocol format and send it to the RRU.

A method for RRU microwave transmission conversion, comprising steps:

Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, merging the first relevant information data into the basic frame format data of the downlink RRU protocol, and The basic frame format data of the RRU protocol is mapped to the data frame of the downlink microwave protocol format and then transmitted, and the first relevant information data includes control words and IQ data;

Receive the data frame of the uplink microwave protocol format, extract the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and compose the basic frame format data of the uplink RRU protocol into a data packet of the uplink RRU protocol format and send it to the RRU.

A RRU microwave transmission conversion device, comprising: an RRU protocol conversion module connected to RRU equipment, and a microwave protocol conversion module connected to microwave equipment:

The RRU protocol conversion module is used to identify the data packet in the downlink RRU protocol format transmitted by the RRU, and extract the first relevant information data from the data packet in the downlink RRU protocol format, and the first relevant information data includes a control word, The IQ data is also used to send the received second related information data of the RRU protocol to the RRU device after forming a data packet in the uplink RRU protocol format, and the second related information data includes control words and IQ data;

The microwave protocol conversion module is configured to map the received first related information data to a data frame in the downlink microwave protocol format and then transmit it, and receive the data frame in the uplink microwave protocol format and extract the second related information data therefrom .

A RRU microwave transmission conversion device, comprising: an RRU protocol conversion module connected to RRU equipment, and a microwave protocol conversion module connected to microwave equipment:

The RRU protocol conversion module is used to identify the data packet in the downlink RRU protocol format transmitted by the RRU, and extract the first relevant information data from the data packet in the downlink RRU protocol format, and the first relevant information data includes a control word, The IQ data is also used to send the received second related information data of the RRU protocol to the RRU device after forming a data packet in the uplink RRU protocol format, and the second related information data includes control words and IQ data;

The microwave protocol conversion module is used to map the received basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format and then transmit it, and receive the data frame of the uplink microwave protocol format and extract the data frame of the uplink RRU protocol therefrom Basic frame format data.

An RRU microwave transmission system includes: RRU equipment, microwave equipment, and the above-mentioned RRU microwave transmission conversion device.

According to the above solution of the present invention, it interconnects with the RRU device, identifies and extracts the first related information data of the RRU device, and maps the first related information data of the RRU protocol or the data frame of the RRU protocol format to the data of the microwave protocol format frame to realize interconnection and intercommunication with microwave equipment, thereby realizing seamless connection between RRU and microwave equipment. In the case of insufficient optical fiber resources, optical fiber transmission and microwave transmission can be combined for signal Transmission can meet the needs of wireless signal coverage in the case of insufficient optical fiber resources.

Description of drawings

Figure 1 is a schematic diagram of an existing application of interconnecting devices with optical fibers for signal transmission;

2 is a schematic diagram of the processing flow in the downlink direction of Embodiment 1 of the RRU microwave transmission conversion method of the present invention;

3 is a schematic diagram of the processing flow in the uplink direction of Embodiment 1 of the RRU microwave transmission conversion method of the present invention;

4 is a schematic diagram of a processing flow in the downlink direction of Embodiment 2 of the RRU microwave transmission conversion method of the present invention;

5 is a schematic diagram of the processing flow in the uplink direction of Embodiment 2 of the RRU microwave transmission conversion method of the present invention;

6 is a schematic diagram of applying the RRU microwave transmission conversion device of the present invention to traditional optical fiber transmission equipment;

FIG. 7 is a schematic structural diagram of Embodiment 1 of the RRU microwave transmission conversion device of the present invention;

FIG. 8 is a schematic structural diagram of Embodiment 2 of the RRU microwave transmission conversion device of the present invention;

FIG. 9 is a schematic structural diagram of Embodiment 3 of the RRU microwave transmission conversion device of the present invention;

FIG. 10 is a schematic structural diagram of Embodiment 4 of the RRU microwave transmission conversion device of the present invention;

Fig. 11 is a schematic diagram of an implementation manner of mapping CPRI frames into STM-N in the present invention.

Detailed ways

The fundamental purpose of the solution of the present invention is to be able to realize the interconnection and intercommunication between the RRU equipment and the microwave equipment. Therefore, the central idea of the present invention is to map the transmission data of the RRU equipment to the data frame of the protocol format adopted by the microwave equipment The transmission is performed to realize the seamless integration of data transmission between the RRU device and the microwave device. Based on different considerations, different methods are used when performing the mapping. The following describes in detail in conjunction with various embodiments.

Firstly, various embodiments of the RRU microwave transmission conversion method of the present invention will be described in detail below.

Embodiment one

The RRU microwave transmission conversion method provided in Embodiment 1 of the present invention is to map the basic frame format data of the RRU protocol of the RRU device as a whole, and it includes steps:

Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, merging the first relevant information data into the basic frame format data of the downlink RRU protocol, and The basic frame format data of the RRU protocol is mapped to the data frame of the downlink microwave protocol format and then transmitted, and the first relevant information data includes control words and IQ data;

Receive the data frame of the uplink microwave protocol format, extract the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and compose the basic frame format data of the uplink RRU protocol into a data packet of the uplink RRU protocol format and send it to the RRU.

Wherein, the steps in the above-mentioned RRU microwave transmission conversion method are described in conjunction with the transmission in the uplink and downlink directions, and will be described in conjunction with the processing methods in the downlink direction and the uplink direction respectively. It should be noted that, in the following illustrations, the downlink direction refers to the direction in which the RRU transmits data to the microwave, and the uplink direction refers to the direction in which the microwave transmits data to the RRU.

As shown in Figure 2, it is a schematic diagram of the processing flow in the downlink direction of Embodiment 1 of the RRU microwave transmission conversion method of the present invention, which includes steps:

Step S1011: identify the data packet in the RRU protocol format transmitted by the RRU (referred to as a data packet in the downlink RRU protocol format, to be distinguished from the data packet in the uplink direction, hereinafter the same), and enter step S1012;

Step S1012: extract the first relevant information data from the data packet in the downlink RRU protocol format, the first relevant information data includes the control word and IQ data, and enter step S1013;

Step S1013: Merge the first relevant information data into the basic frame format data of the RRU protocol (referred to as the basic frame format data of the downlink RRU protocol, to distinguish it from the uplink direction, hereinafter the same), enter step S1014;

Step S1014: Map the basic frame format data of the downlink RRU protocol to the data frame of the microwave protocol format (referred to as the data frame of the downlink microwave protocol format, to distinguish it from the data frame of the uplink direction, hereinafter the same) and then transmit it .

Figure 3 shows a schematic diagram of the processing flow in the uplink direction of Embodiment 1 of the RRU microwave transmission conversion method of the present invention, which includes steps:

Step S1021: Receive a data frame in the microwave protocol format (referred to as a data frame in the uplink microwave protocol format, to be distinguished from a data frame in the downlink direction, hereinafter the same), and enter step S1022;

Step S1022: extract the basic frame format data of the RRU protocol (referred to as the basic frame format data of the uplink RRU protocol, to distinguish it from the downlink direction, hereinafter the same) from the data frame of the uplink microwave protocol format, and enter the step S1023;

Step S1023: The basic frame format data of the uplink RRU protocol is formed into a data packet in the RRU protocol format (referred to as a data packet in the uplink RRU protocol format, to be distinguished from a data packet in the downlink direction, hereinafter the same) and then sent to The RRU.

According to this processing method, in the downlink direction, by identifying the data packets in the downlink RRU protocol format transmitted by the RRU, and extracting the first related information data therefrom, the first related information data is merged into the basic frame format data of the downlink RRU protocol and then mapped to the data frame of the downlink microwave protocol format, so as to realize the conversion between the RRU protocol format and the microwave protocol format, and realize the transmission conversion and communication between the RRU and the microwave in the downlink direction; in the uplink direction, due to the received uplink microwave The data frame in the protocol format is mapped to the basic frame format data of the RRU protocol, so the basic frame format data of the uplink RRU protocol can be extracted from it, and the basic frame format data of the uplink RRU protocol can be composed into the data packet of the uplink RRU protocol Then send it to the RRU, so as to realize the conversion between the microwave protocol format and the RRU protocol format, and realize the transmission conversion and communication between the microwave and the RRU in the uplink direction.

Since the sampling rate of IQ data is different according to different systems, considering the different system configurations, RRU equipment usually transmits data through optical fiber, while microwave equipment usually transmits data by microwave, the transmission rate of RRU equipment and microwave equipment The difference is that the optical fiber transmission rate of the RRU equipment is usually high, and the microwave transmission rate of the microwave equipment is low. Therefore, in order to make the extracted IQ data adapt to the transmission rate of the microwave equipment, data extraction processing is required. Therefore, in the above Between step S1012 and step S1013, further steps are included:

Step S10121: Perform N/M times extraction processing on the extracted first relevant information data. Wherein, when performing N/M times extraction processing, no processing may be performed on the control word.

Correspondingly, in the uplink direction, in order to adapt the IQ data in the basic frame format data of the uplink RRU protocol to the transmission rate of the RRU device, data interpolation processing is required. Therefore, in the above step S1022, in After the basic frame format data of the uplink RRU protocol is extracted, the second related information data of the RRU protocol is also extracted from the basic frame format data of the uplink RRU protocol, and the second related information data includes control words and IQ data. Between step S1022 and step S1023, further steps are included:

Step S10222: Perform N/M times interpolation processing on the second relevant information data.

At this time, in the above step S1023, the second correlation information data after the N/M times interpolation process is formed into a data packet in the uplink RRU protocol format.

In addition, considering that the optical fiber transmission capacity is greater than the microwave transmission capacity, bandwidth matching is also required, and the data frame in the RRU protocol format is compressed and encoded. Therefore, between the above steps S1012 and S1013, further steps are included:

Step S10122: Compress and encode the extracted first relevant information data.

Correspondingly, in the uplink direction, in the above step S1022, after the basic frame format data of the uplink RRU protocol is extracted, the second related information data of the RRU protocol is also extracted from the basic frame format data of the uplink RRU protocol, The second relevant information data includes control words and IQ data, and between the above-mentioned step S1022 and step S1023, it also includes the steps of:

Step S10221: Decompress and decode the second relevant information data.

At this time, in the above step S1023, the decompressed and decoded second related information data is formed into a data packet in the uplink RRU protocol format.

Wherein, in the downlink direction, the process of the compression coding process is directly related to the above-mentioned step S1012 under the condition of not considering the difference in transmission rate between systems, not performing N/M times decimation processing, and not performing N/M times interpolation processing. The first related information data extracted in the step is processed, and in the uplink direction, the process of the compression encoding process is to directly process the second related information data extracted in the above step S1022.

In the case of considering the difference in transmission rate between systems, performing N/M times of extraction processing and N/M times of interpolation processing, in the downlink direction, the process of the compression encoding process is N/M times of the above step S10121. The extracted first related information data is compressed and encoded. In the uplink direction, after the decompression and decoding process is performed on the second related information data extracted in the above step S1022, then enter the above step S10222 to perform N/M Double interpolation processing.

Embodiment two

The RRU microwave transmission conversion method provided in Embodiment 2 of the present invention considers mapping the control word and IQ data of the RRU protocol of the RRU device respectively, and it includes steps:

Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, mapping the first relevant information data to the data frames in the downlink microwave protocol format and then transmitting them, The first relevant information data includes control words and IQ data;

Receive the data frame of the uplink microwave protocol format, extract the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and send the second related information data to the data packet of the uplink RRU protocol format and send it to the RRU.

Wherein, the steps in the above-mentioned RRU microwave transmission conversion method are described in conjunction with the transmission in the uplink and downlink directions, and will be described in conjunction with the processing methods in the downlink direction and the uplink direction respectively. It should be noted that, in the following illustrations, the downlink direction refers to the direction in which the RRU transmits data to the microwave, and the uplink direction refers to the direction in which the microwave transmits data to the RRU.

As shown in Figure 4, it is a schematic diagram of the processing flow in the downlink direction of Embodiment 2 of the RRU microwave transmission conversion method of the present invention, which includes steps:

Step S2011: identify the data packet in the downlink RRU protocol format transmitted by the RRU, and proceed to step S2012;

Step S2012: Extract the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word and IQ data, and enter step S2013;

Step S2013: Map the first related information data to a data frame in the downlink microwave protocol format and transmit it.

Figure 5 shows a schematic diagram of the processing flow in the uplink direction of Embodiment 2 of the RRU microwave transmission conversion method of the present invention, which includes steps:

Step S2021: Receive a data frame in the uplink microwave protocol format, and enter step S2022;

Step S2022: extract the second relevant information data of the RRU protocol from the data frame of the uplink microwave protocol format, the second related information data includes control words and IQ data, and enter step S2023;

Step S2023: compose the second relevant information data into a data packet in the uplink RRU protocol format and send it to the RRU.

According to this processing method, in the downlink direction, by identifying the downlink RRU protocol format data packet transmitted by the RRU, extracting the first related information data from it, and mapping the first related information data to the downlink microwave protocol format data frame, thereby realizing The conversion between the RRU protocol format and the microwave protocol format realizes the transmission conversion and communication between the RRU and the microwave in the downlink direction; information data, therefore, the second relevant information data can be extracted therefrom, and the second relevant information data is composed into an uplink RRU protocol data packet and sent to the RRU, thereby realizing the conversion between the microwave protocol format and the RRU protocol format, Realize the transmission conversion and communication between microwave and RRU in the uplink direction.

Similar to the first embodiment above, in order to adapt the extracted IQ data to the transmission rate of the microwave equipment, data extraction processing is required. Therefore, between the above step S2012 and step S2013, further steps are included:

Step S20121: Perform N/M times extraction processing on the extracted first related information data. Wherein, when performing N/M times extraction processing, no processing may be performed on the control word.

Correspondingly, in the uplink direction, between the above step S2022 and step S2023, further steps are included:

Step S20222: Perform N/M times interpolation processing on the second relevant information data.

In addition, similar to the first embodiment above, considering the difference between optical fiber transmission capability and microwave transmission capability, therefore, between the above step S2012 and step S2013, further steps are included:

Step S20122: Compress and encode the extracted first relevant information data.

Correspondingly, in the uplink direction, between the above step S2022 and step S2023, further steps are included:

Step S20221: Decompress and decode the second relevant information data.

Wherein, similar to the above-mentioned first embodiment, in the downlink direction, the compression coding process The process is to directly process the first relevant information data extracted in the above step S2012, and in the uplink direction, the compression encoding process is to directly process the second relevant information data extracted in the above step S2022.

In the case of considering the difference in transmission rate between systems, performing N/M times of extraction processing, and N/M times of interpolation processing, in the downlink direction, the process of the compression encoding process is N/M times of the above step S20121. The extracted first related information data is compressed and encoded. In the uplink direction, after the decompression and decoding process is performed on the second related information data extracted in the above step S2022, then enter the above step S20222 to perform N/ M times interpolation processing.

According to the above-mentioned RRU microwave transmission conversion method of the present invention, the present invention provides a RRU microwave transmission conversion device. Figure 6 shows a schematic diagram of applying the RRU microwave transmission conversion device of the present invention to traditional optical fiber transmission equipment. By applying this The RRU microwave transmission conversion device invented can connect RRU equipment and microwave equipment together through the RRU microwave transmission conversion device, give full play to their respective advantages, and solve the problem of signal coverage.

According to the application schematic diagram in Figure 6, in the specific data processing process, the data processing flow is as follows:

The data of the REC equipment is transmitted to the RRU microwave transmission conversion device through the optical fiber;

The RRU microwave transmission conversion device processes the data transmitted by the REC equipment, converts it into a microwave protocol data format that the microwave equipment can recognize, and transmits it to the microwave equipment;

Subsequently, the microwave equipment transparently transmits the data sent by the RRU microwave transmission conversion device to the microwave equipment at the destination end through microwaves;

The microwave device at the destination restores the received data, and sends the restored data to the RRU microwave transmission conversion device;

The RRU microwave transmission conversion device processes the received restored data, converts it into data in the RRU protocol format that the RRU device can recognize, and outputs it to the RE device through the optical fiber.

When connecting the RRU device and the microwave device through the RRU microwave transmission conversion device, the RRU microwave transmission conversion device may be implemented in different ways, and the embodiments of the RRU microwave transmission conversion device of the present invention will be described in detail below.

Embodiment one

FIG. 7 shows a schematic structural diagram of Embodiment 1 of the RRU microwave transmission conversion device of the present invention. As shown in Figure 7, the RRU microwave transmission conversion device of the present invention includes: an RRU protocol conversion module connected to the RRU device, and a microwave protocol conversion module connected to the microwave device, wherein the RRU protocol conversion module is used to complete the communication with the RRU device Interconnection, extracting relevant information of RRU equipment, microwave protocol conversion module, used to complete the interconnection and intercommunication with microwave equipment, and realize the mapping between the basic frame format data of RRU protocol format and the data frame of microwave protocol format.

According to the RRU microwave transmission conversion device in this embodiment, specific processing methods will vary according to different consideration factors, and several processing processes will be described in detail below.

In one of the specific communication processes, the specific processing process may be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then merge the extracted first related information data into the basic frame format data of the downlink RRU protocol and send it to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format to realize the seamless integration of the RRU protocol format and the microwave protocol format, and then converts the mapped downlink microwave protocol format The data frame is sent out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, extracts the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and converts the basic frame format data of the uplink RRU protocol Send to the RRU protocol conversion module;

After receiving the basic frame format data of the uplink RRU protocol, the RRU protocol conversion module forms the basic frame format data of the uplink RRU protocol into a data packet of the uplink RRU protocol format, and sends the data packet of the uplink RRU protocol format to the RRU.

In another specific communication process, the specific processing process may be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then merge the extracted first relevant information data into a data frame in the downlink RRU protocol format and send it to the microwave protocol conversion module;

After the microwave protocol conversion module receives it, it extracts the first related information data from the basic frame format data of the downlink RRU protocol, and maps the first related information data to the data frame of the downlink microwave protocol format to realize the RRU protocol format and microwave Seamless fusion of protocol formats, and then send out the mapped data frames in the downlink microwave protocol format;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, and extracts the second related information data from the data frame of the uplink microwave protocol format, the second related information data includes the control word, IQ information, and Send the second relevant information to the RRU protocol conversion module after forming the basic frame format data of the uplink RRU protocol;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

In another specific communication process, the specific processing process may be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the first relevant information data to the data frame of the downlink microwave protocol format, realizes the seamless integration of the RRU protocol format and the microwave protocol format, and then sends the mapped data frame of the downlink microwave protocol format go out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave device, and extracts the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and the second related information data includes the control word, IQ data, and send the second relevant information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

Embodiment two

As shown in Figure 8, it is a schematic structural diagram of the second embodiment of the RRU microwave transmission conversion device of the present invention. In this embodiment, the difference from the solution of the first embodiment above is that the RRU microwave transmission The conversion unit also includes:

The N/M times extraction module and the N/M times interpolation module respectively connected between the RRU protocol conversion module and the microwave protocol conversion module, wherein, the input end of the N/M times extraction module is connected with the RRU protocol conversion module, and the output The end is connected with the microwave protocol conversion module, the input end of the N/M times interpolation module is connected with the microwave protocol conversion module, and the output end is connected with the RRU protocol conversion module. According to different system requirements or different performance requirements, the configuration of the extraction parameters of the N/M times extraction module and the interpolation parameters of the N/M times interpolation module will also be different, so as to complete the connection of RRU devices with different baseband rates. entry requirements.

In this embodiment, considering that the sampling rate of IQ data varies according to different systems, the configuration of different systems will be different. RRU devices usually transmit data through optical fibers, and microwave devices usually transmit data through microwaves. , and the transmission rate of RRU equipment and microwave equipment is different. Usually, the optical fiber transmission rate of RRU equipment is high, and the microwave transmission rate of microwave equipment is low. Therefore, the data is extracted and interpolated so that the processed data The transmission rate of the frame can be matched to the transmission rate of the corresponding system.

According to the RRU microwave transmission conversion device in this embodiment, the specific processing methods will be different according to different consideration factors, and the three processing methods will be described in detail below.

The first processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment access requirements, and combine the extracted and processed first relevant information data into a data frame in the downlink RRU protocol format and send it to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format to realize the seamless integration of the RRU protocol format and the microwave protocol format, and then converts the mapped downlink microwave protocol format The data frame is sent out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, extracts the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and converts the basic frame format data of the uplink RRU protocol Send to N/M times interpolation module;

After the N/M times interpolation module receives it, it extracts the second related information data from the received basic frame format data of the uplink RRU protocol. The second related information data includes control words and IQ data, according to different system requirements or performance It is required to configure the N and M values, interpolate the IQ data in the second related information data by N/M times to meet the access requirements of the RRU device, and send the interpolated second related information data to RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

The second processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment access requirements, and combine the extracted and processed first relevant information data into a data frame in the downlink RRU protocol format and send it to the microwave protocol conversion module;

After the microwave protocol conversion module receives it, it extracts the first related information data from the basic frame format data of the downlink RRU protocol, and maps the first related information data to the data frame of the downlink microwave protocol format to realize the RRU protocol format and microwave Seamless fusion of protocol formats, and then send out the mapped data frames in the downlink microwave protocol format;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, and extracts the second related information data from the data frame of the uplink microwave protocol format, the second related information data includes the control word, IQ information, and The second relevant information is formed into the basic frame format data of the uplink RRU protocol and then sent to the N/M times interpolation module;

After receiving, the N/M times interpolation module extracts the second relevant information data from the received basic frame format data of the uplink RRU protocol, and calculates the second relevant information according to the N and M values configured according to different system requirements or performance requirements The IQ data in the data is interpolated by N/M times to meet the access requirements of the rate of the RRU device, and the interpolated second related information data is sent to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

A third approach could be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment Access requirements, and send the extracted and processed first relevant information data to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the first relevant information data to the data frame of the downlink microwave protocol format, realizes the seamless integration of the RRU protocol format and the microwave protocol format, and then sends the mapped data frame of the downlink microwave protocol format go out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave device, and extracts the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and the second related information data includes the control word, IQ data, and send the second relevant information data to the N/M times interpolation module;

After receiving the N/M times interpolation module, according to the N and M values configured according to different system requirements or performance requirements, the IQ data in the second related information data is interpolated by N/M times to meet the speed of the RRU device. input requirements, and send the interpolated second related information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

Embodiment three

As shown in Figure 9, it is a schematic structural diagram of the third embodiment of the RRU microwave transmission conversion device of the present invention. In this embodiment, the difference from the solution of the first embodiment above is that the RRU microwave transmission The conversion unit also includes:

The data volume compression encoding module and the data recovery decoding module respectively connected between the RRU protocol conversion module and the microwave protocol conversion module, wherein, the input end of the data volume compression encoding module is connected with the RRU protocol conversion module, and the output end is connected with the microwave protocol conversion module The modules are connected, the input end of the data recovery decoding module is connected with the microwave protocol conversion module, and the output end is connected with the RRU protocol conversion module.

In this embodiment, it is considered that RRU equipment usually transmits data through optical fibers, while microwave equipment usually transmits data through microwaves, and its transmission capacity is usually limited. The transmission capacity of optical fibers is greater than that of microwaves, so the process of compression encoding Compression and encoding are performed so that the processed data can match the corresponding bandwidth, meet the transmission requirements of the corresponding system, and improve data transmission efficiency.

Since the amount of data coming through the optical fiber is very large, assuming its capacity is A, and the transmission capacity of the microwave system is limited, assuming its capacity is B, then the compression ratio is B/A to meet the bandwidth matching requirements A*(B/ A)=B, the data amount compression encoding module dynamically calculates the amount of data, according to the input bandwidth A, output bandwidth B, the data is compressed and encoded by B/A times, to match the microwave transmission bandwidth, select the best compression rate, Reduce the problem of signal quality degradation caused by insufficient microwave bandwidth, and finally meet the transmission requirements of microwave systems.

The inverse process of the data volume compression encoding module processing performed by the data recovery decoding module.

According to the RRU microwave transmission conversion device in this embodiment, the specific processing methods will be different according to different consideration factors, and the three processing methods will be described in detail below.

The first processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is combined into the basic frame format data of the downlink RRU protocol and sent to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format to realize the seamless integration of the RRU protocol format and the microwave protocol format, and then converts the mapped downlink microwave protocol format The data frame is sent out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, extracts the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and converts the basic frame format data of the uplink RRU protocol Send to the data recovery decoding module;

After the data recovery decoding module receives, extract the second related information data from the basic frame format data of the received uplink RRU protocol, the second related information data includes control words, IQ data, and the basic frame format data of the uplink RRU protocol Perform decoding and decompression processing to meet the transmission requirements of the RRU device, and then send the second related information data after decoding and decompression processing to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

The second processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is combined into the basic frame format data of the downlink RRU protocol and sent to the microwave protocol conversion module;

After the microwave protocol conversion module receives it, it extracts the first related information data from the basic frame format data of the downlink RRU protocol, and maps the first related information data to the data frame of the downlink microwave protocol format to realize the RRU protocol format and microwave Seamless fusion of protocol formats, and then send out the mapped data frames in the downlink microwave protocol format;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, and extracts the second related information data from the data frame of the uplink microwave protocol format, the second related information data includes the control word, IQ information, and The second relevant information is composed into the basic frame format data of the uplink RRU protocol and then sent to the data recovery decoding module;

After the data recovery decoding module receives it, it extracts the second relevant information data from the received basic frame format data of the uplink RRU protocol, decodes and decompresses the basic frame format data of the uplink RRU protocol, so as to meet the transmission requirements of the RRU device. request, and then send the decoded and decompressed second relevant information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

A third approach could be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is sent to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the first relevant information data to the data frame of the downlink microwave protocol format, realizes the seamless integration of the RRU protocol format and the microwave protocol format, and then sends the mapped data frame of the downlink microwave protocol format go out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave device, and extracts the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and the second related information data includes the control word, IQ data, and send the second relevant information data to the data recovery decoding module;

After the data recovery decoding module receives it, it decodes and decompresses the second relevant information data to meet the transmission requirements of the RRU device, and then sends the decoded and decompressed second relevant information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

Embodiment four

As shown in Figure 10, it is a schematic structural diagram of the fourth embodiment of the RRU microwave transmission conversion device of the present invention. In this embodiment, the main difference from the solution of the first embodiment above is that the RRU microwave transmission The conversion unit also includes:

The N/M times extraction module and the N/M times interpolation module respectively connected between the RRU protocol conversion module and the microwave protocol conversion module also include the data volume connected between the N/M times extraction module and the microwave protocol conversion module A compression encoding module, a data recovery decoding module connected between the N/M times interpolation module and the microwave protocol conversion module, wherein the input terminal of the N/M times extraction module is connected to the RRU protocol conversion module, and the output terminal is connected to the data volume The input end of the compression encoding module is connected, the output end of the data volume compression encoding module is connected with the microwave protocol conversion module, the input end of the data recovery decoding module is connected with the microwave protocol conversion module, and the output end is connected with the N/M times interpolation module The input terminals are connected, and the output terminals of the N/M times interpolation module are connected with the RRU protocol conversion module.

In this embodiment, it is considered that the sampling rate of IQ data is different according to the system, and the configuration of different systems will be different. RRU equipment usually transmits data through optical fibers, and microwave equipment usually uses microwave transmission. data, and the transmission rate of RRU equipment and microwave equipment is different. Usually, the optical fiber transmission rate of RRU equipment is high, and the microwave transmission rate of microwave equipment is low. Therefore, the data is extracted and interpolated so that the processed The transmission rate of the data frame can be matched to the transmission rate of the corresponding system. At the same time, it is also considered that RRU equipment usually transmits data through optical fibers, while microwave equipment usually transmits data through microwaves, and its transmission capacity is usually limited. The transmission capacity of optical fibers is greater than that of microwaves, so compression coding is performed through the process of compression coding. The processed data can match the corresponding bandwidth, meet the transmission requirements of the corresponding system, and improve the data transmission efficiency.

According to different system requirements or different performance requirements, the configuration of the extraction parameters of the N/M times extraction module and the interpolation parameters of the N/M times interpolation module will also be different, so as to complete the connection of RRU devices with different baseband rates. entry requirements.

Since the amount of data coming through the optical fiber is very large, assuming its capacity is A, and the transmission capacity of the microwave system is limited, assuming its capacity is B, then the compression ratio is B/A to meet the bandwidth matching requirements A*(B/ A)=B, the data amount compression encoding module dynamically calculates the amount of data, according to the input bandwidth A, output bandwidth B, the data is compressed and encoded by B/A times, to match the microwave transmission bandwidth, select the best compression rate, Reduce the problem of signal quality degradation caused by insufficient microwave bandwidth, and finally meet the transmission requirements of microwave systems. The inverse process of the data volume compression encoding module processing performed by the data recovery decoding module.

According to the RRU microwave transmission conversion device in this embodiment, the specific processing methods will be different according to different consideration factors, and the three processing methods will be described in detail below.

The first processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment access requirements, and send the extracted and processed first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is combined into the basic frame format data of the downlink RRU protocol and sent to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format to realize the seamless integration of the RRU protocol format and the microwave protocol format, and then converts the mapped downlink microwave protocol format The data frame is sent out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, extracts the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and converts the basic frame format data of the uplink RRU protocol Send to the data recovery decoding module;

After the data recovery decoding module receives, extract the second related information data from the basic frame format data of the received uplink RRU protocol, the second related information data includes control words, IQ data, and the basic frame format data of the uplink RRU protocol Perform decoding and decompression processing to meet the transmission requirements of the RRU device, and then send the decoded and decompressed second related information data to the N/M times interpolation module;

After receiving the N/M times interpolation module, according to the N and M values configured according to different system requirements or performance requirements, the IQ data in the second related information data is interpolated by N/M times to meet the speed of the RRU device. input requirements, and send the interpolated second related information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

The second processing method:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment access requirements, and send the extracted and processed first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is combined into the basic frame format data of the downlink RRU protocol and sent to the microwave protocol conversion module;

After the microwave protocol conversion module receives it, it extracts the first related information data from the basic frame format data of the downlink RRU protocol, and maps the first related information data to the data frame of the downlink microwave protocol format to realize the RRU protocol format and microwave Seamless fusion of protocol formats, and then send out the mapped data frames in the downlink microwave protocol format;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, and extracts the second related information data from the data frame of the uplink microwave protocol format, the second related information data includes the control word, IQ information, and The second relevant information is composed into the basic frame format data of the uplink RRU protocol and then sent to the data recovery decoding module;

After the data recovery decoding module receives it, it extracts the second relevant information data from the received basic frame format data of the uplink RRU protocol, decodes and decompresses the basic frame format data of the uplink RRU protocol, so as to meet the transmission requirements of the RRU device. Requirements, and then send the decoded and decompressed second relevant information data to the N/M times interpolation module;

After receiving the N/M times interpolation module, according to the N and M values configured according to different system requirements or performance requirements, the IQ data in the second related information data is interpolated by N/M times to meet the speed of the RRU device. input requirements, and send the interpolated second related information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

A third approach could be:

In the downstream direction:

The RRU protocol conversion module receives and recognizes the data packet in the downlink RRU protocol format transmitted by the RRU through the optical fiber, and extracts the first related information data from the data packet in the downlink RRU protocol format, the first related information data includes the control word , IQ data, and then send the extracted first relevant information data to the N/M times extraction module;

After receiving the N/M times extraction module, according to the N and M values configured according to different system requirements or performance requirements, N/M times are extracted from the IQ data of the received first related information data to meet the requirements of the baseband rate of the microwave equipment access requirements, and send the extracted and processed first related information data to the data volume compression coding module;

After the data volume compression coding module receives it, according to the transmission capability of the RRU and the transmission capability of the microwave equipment, it compresses and codes the received first correlation information data to meet the transmission requirements of the microwave system, and then compresses and codes the first correlation information The information data is sent to the microwave protocol conversion module;

After receiving it, the microwave protocol conversion module maps the first relevant information data to the data frame of the downlink microwave protocol format, realizes the seamless integration of the RRU protocol format and the microwave protocol format, and then sends the mapped data frame of the downlink microwave protocol format go out;

In the upstream direction:

The microwave protocol conversion module receives the data frame of the uplink microwave protocol format transmitted by the microwave equipment, and extracts the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and the second related information data includes the control word, IQ data, and send the second relevant information data to the data recovery decoding module;

After the data recovery decoding module receives it, it decodes and decompresses the second relevant information data to meet the transmission requirements of the RRU device, and then sends the decoded and decompressed second relevant information data to the N/M times interpolation module;

After receiving the N/M times interpolation module, according to the N and M values configured according to different system requirements or performance requirements, the IQ data in the second related information data is interpolated by N/M times to meet the speed of the RRU device. input requirements, and send the interpolated second related information data to the RRU protocol conversion module;

After receiving the second relevant information data, the RRU protocol conversion module composes the second relevant information data into an uplink RRU protocol format data packet, and sends the uplink RRU protocol format data packet to the RRU.

The above-mentioned RRU microwave transmission conversion device in each embodiment of the present invention may be implemented by using programmable logic devices such as CPLD, FPGA, EPLD, DSP, or by using a dedicated ASIC chip.

At present, different manufacturers have different options for RRU transmission methods. These RRU transmission methods can be IR protocol, OBSAI protocol, and CPRI transmission method. Therefore, depending on the selected transmission method, the above-mentioned downlink RRU protocol format and uplink RRU protocol format It can be in IR protocol format, OBSAI protocol format, or CPRI protocol format. As for the transmission mode between microwave devices, because it is P2P transmission, any transmission mode can be used, either the existing transmission mode or the self-developed microwave transmission mode. At present, the general transmission mode between microwaves adopts the STM-N protocol. Therefore, in the case of using the STM-N protocol for microwave transmission, the above-mentioned downlink microwave protocol format and uplink microwave protocol format are the STM-N protocol format.

Most of the current RRU transmission methods use CPRI transmission, and most of the microwave transmission methods use STM-N transmission. Therefore, the following RRU transmission method is CPRI transmission (that is, the downlink RRU protocol format and the uplink RRU protocol format are CPRI protocol format. ), the microwave transmission mode is the STM-N transmission mode (that is, the downlink microwave protocol format, the uplink microwave protocol format is the STM-N protocol format) as an example, in combination with the RRU microwave transmission conversion device in the fourth embodiment above, for the first How it works is described in detail.

First of all, for the CPRI transmission mode, for the standard CPRI basic frame structure, different CPRI rates are achieved by configuring different T(15*T) values, for example: if the CPRI rate is 614.4Mbit/s , it is 15*8; if it is 1228.8Mbit/s CPRI rate, it is 15*16; if it is 2457.6Mbit/s CPRI rate, it is 15*32; and so on for the rest. The basic frame structure of 256 CPRIs can form a CPRI superframe, and 150 superframes can form a CPRI wireless frame (also called CPRI 10ms frame), and the transmission on the optical fiber is packaged by 256 basic frames composed of CPRI superframes.

Then, in the downlink transmission direction, since the RRU device connected at the beginning does not know what rate of CPRI it uses on the optical fiber, therefore, for the RRU protocol conversion module, one of its functions is to identify The rate on the line is used to determine the T value. The method adopted may be to poll by constantly changing the T value, and to see when T is equal to the correct data can be detected to realize data synchronization. After determining the T value, the RRU protocol conversion module can extract information such as IQ data and control words from the received data packet (CPRI superframe composed of 256 basic frames), After receiving the information, send the information to the N/M times extraction module for processing.

Because the sampling rate of IQ data is different according to different systems, for example, assuming that the downlink IQ rate of the system on the RRU device side is 1.92M, while the low-rate microwave device side can only transmit 0.64M IQ data, then Just must carry out data extraction 3 times to the IQ data of 1.92M, namely N=3, M=1; The transmission rate requirements of the microwave equipment at the same rate, at the same time, do not do any processing on the control word. Subsequently, the 0.64M data extracted by N/M times is sent to the data volume compression encoding module for processing.

In the IQ data transmitted by the RRU device, I is 15bit or more, and Q is 15bit or more, so the number of bits must be reduced to meet the bandwidth requirements of microwave transmission (the bandwidth calculation method is: chip rate*I*Q ), taking I as 15bit, Q as 15bit, and chip rate as 0.96 as an example, then the bandwidth is 0.96 (chip rate)*15(I)*15(Q), assuming that after the data volume compression coding module, the IQ number It is processed into 10bit, and the chip rate of the microwave device is 0.64, then the IQ data bandwidth is 0.64 (chip rate)*10(I)*10(Q)} after passing through the data volume compression encoding module, and at the same time according to the occupation of the control word In this case, the control word load is processed accordingly (for example, the control word is 16bit, but in fact there are still many free spaces in the 256 positions of the entire CPRI frame, and only 16 control words are used in this system, then the control word load can be averaged to It is not transmitted in the control word, and it is guaranteed to process the control word into 10 bits, and the remaining 6 bits can be transmitted in the idle position).

Subsequently, the data volume compression coding module merges the compressed and coded IQ data and control words into the basic frame format of CPRI (but the rate and bit width are changed), and then sends the data to the microwave protocol conversion module for processing.

The microwave protocol conversion module maps the received compressed CPRI frame to its own transmission load to form an STM-N data frame, and then transmits it through the microwave device. Fig. 11 shows a schematic diagram of an implementation manner of mapping the CPRI frame into the STM-N, through the microwave protocol conversion module, the CPRI frame can be mapped into the PAYLOAD of the STM-N. In this illustration, the overall mapping of the CPRI frame is described. If the second or third method above is used to map the first related information data, the CPRI control word can be mapped to the RSOH of the STM-N frame structure , AU-PTR, MSOH or PAYLOAD, while the IQ BLOCK data of CPRI is encoded and mapped to the PAYLOAD of STM-N.

Thus, the communication transmission process in the downlink direction is completed so far.

The processing process in the uplink transmission direction is the inverse process in the above downlink direction, specifically:

The microwave protocol conversion module is responsible for extracting the compressed CPRI frame from the STM-N payload, and then sending it to the data recovery decoding module for decoding and decompression, and recovers the same bit width as before compression and encoding according to the extracted encoding information. If it is 14bit before compression encoding, it is also 14bit after recovery, if it is 15bit or higher, it is also 15bit or higher, and the control word is restored according to the placement of the previous control word. The recovered data is sent to the N/M times interpolation module, and the N/M times interpolation module interpolates the data to the required rate according to the previous extraction rate or system requirements, for example, the previous 1.92 extracted 3 times, assuming the current requirement 0.64M is interpolated to 0.96M (the rate in the uplink direction may be different from the rate in the uplink direction), then it needs to be interpolated by 3/2 times (N=3, M=2). Then send the IQ data and the control word to be transmitted into the RRU protocol conversion module, and the RRU protocol conversion module first forms the IQ data and the control word into a basic frame according to the CPRI protocol standard, and then forms the basic frame into a super frame and sends it to the RRU end through the optical fiber . In the case that the number of superframes exceeds 256, every 256 superframes form a wireless frame to be sent to the RRU end through the optical fiber.

The above is an example in which the RRU transmission mode is CPRI transmission and the microwave transmission mode is STM-N transmission mode. If the RRU transmission mode adopts other protocols, and/or the microwave transmission mode adopts other protocols, the specific transmission conversion mode and Similar to the above, when performing mapping, due to the different protocols of each transmission method, it may be different. Specifically, it is related to the frame structure of each transmission protocol. According to different needs, when setting the mapping method, it can be based on the corresponding RRU The specific protocols of the transmission mode and the microwave transmission mode are used to make corresponding different settings, which will not be repeated here.

According to the RRU microwave transmission conversion device of the present invention described above, the present invention also provides a RRU microwave transmission system, which includes RRU equipment, microwave equipment, and RRU microwave transmission conversion device, and the specific implementation of the RRU microwave transmission conversion device is the same as the above-mentioned It is the same in each embodiment of the present invention, and will not be repeated here.

The embodiments of the present invention described above are only descriptions of preferred embodiments of the present invention, and do not constitute a limitation to the protection scope of the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims (10)

1. A RRU microwave transmission conversion method, comprising steps: Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, mapping the first relevant information data to the data frames in the downlink microwave protocol format and then transmitting them, The first relevant information data includes control words and IQ data; Receive the data frame of the uplink microwave protocol format, extract the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and send the second related information data to the data packet of the uplink RRU protocol format and send it to the RRU. 2. RRU microwave transmission conversion method according to claim 1, is characterized in that: After extracting the first related information data and before mapping the first related information data to the data frame of the downlink microwave protocol format, the method further includes the step of: performing N/M times extraction processing on the first related information data; After extracting the second relevant information data of the RRU protocol, before forming the second relevant information data into a data packet in the uplink RRU protocol format, a step is also included: performing N/M times interpolation processing on the second relevant information data; or After extracting the first relevant information data and before mapping the first relevant information data to the data frame of the downlink microwave protocol format, the method further includes the step of: compressing and encoding the first relevant information data; After extracting the second relevant information data of the RRU protocol and before forming the second relevant information data into a data packet in the uplink RRU protocol format, a step is further included: decoding and decompressing the second relevant information data; or After extracting the first relevant information data and before mapping the first relevant information data to the data frame of the downlink microwave protocol format, further steps: sequentially perform N/M times extraction processing and compression coding on the first relevant information data deal with; After extracting the second relevant information data of the RRU protocol, before forming the second relevant information data into a data packet in the uplink RRU protocol format, the steps of: sequentially decoding and decompressing the second relevant information data, N/ M times interpolation processing. 3. A RRU microwave transmission conversion method, comprising steps: Identifying the data packets in the downlink RRU protocol format transmitted by the RRU, extracting the first relevant information data from the data packets in the downlink RRU protocol format, merging the first relevant information data into the basic frame format data of the downlink RRU protocol, and The basic frame format data of the RRU protocol is mapped to the data frame of the downlink microwave protocol format and then transmitted, and the first relevant information data includes control words and IQ data; Receive the data frame of the uplink microwave protocol format, extract the basic frame format data of the uplink RRU protocol from the data frame of the uplink microwave protocol format, and compose the basic frame format data of the uplink RRU protocol into a data packet of the uplink RRU protocol format and send it to the RRU. 4. RRU microwave transmission conversion method according to claim 3, is characterized in that: After extracting the first relevant information data and before merging the first relevant information data into the basic frame format data of the downlink RRU protocol, it also includes the step of: performing N/M times extraction processing on the first relevant information data; The step of composing the basic frame format data of the uplink RRU protocol into the data packet of the uplink RRU protocol format specifically includes: extracting the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and performing N on the second related information data /M times of interpolation processing, the second relevant information data after N/M times of interpolation processing is formed into a data packet in the uplink RRU protocol format; or After extracting the first related information data and before merging the first related information data into the basic frame format data of the downlink RRU protocol, the method further includes the step of: compressing and encoding the first related information data; The step of composing the basic frame format data of the uplink RRU protocol into the data packet of the uplink RRU protocol format specifically includes: extracting the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and decoding the second related information data Decompression processing, the decoded and decompressed second related information data is formed into a data packet in the uplink RRU protocol format; or After extracting the first related information data, before merging the first related information data into the basic frame format data of the downlink RRU protocol, it also includes the steps of sequentially performing N/M times extraction processing on the first related information data, Compression encoding processing; The step of composing the basic frame format data of the uplink RRU protocol into the data packet of the uplink RRU protocol format specifically includes: extracting the second related information data of the RRU protocol from the data frame of the uplink microwave protocol format, and performing sequential processing on the second related information data Decoding and decompression processing, N/M times interpolation processing, and forming the second related information data after N/M times interpolation processing into an uplink RRU protocol format data packet. 5. according to the RRU microwave transmission conversion method described in any one of claims 1 to 4, it is characterized in that: The downlink RRU protocol format and the uplink RRU protocol format are IR protocol format, OBSAI protocol format or CPRI protocol format; and / or The downlink microwave protocol format and the uplink microwave protocol format are the STM-N protocol format, and when the first relevant information data is mapped to the data frame of the downlink microwave protocol format, the control word is mapped to the RSOH, AU- In PTR, MSOH or PAYLOAD, IQ data is mapped to STM-N PAYLOAD; and / or The downlink microwave protocol format and the uplink microwave protocol format are the STM-N protocol format, and when the basic frame format data of the downlink RRU protocol is mapped to the data frame of the downlink microwave protocol format, the basic frame format data of the downlink RRU protocol Mapped to the PAYLOAD of the STM-N frame structure. 6. A RRU microwave transmission conversion device, comprising: an RRU protocol conversion module connected with RRU equipment, a microwave protocol conversion module connected with microwave equipment: The RRU protocol conversion module is used to identify the data packet in the downlink RRU protocol format transmitted by the RRU, and extract the first relevant information data from the data packet in the downlink RRU protocol format, and the first relevant information data includes a control word, The IQ data is also used to send the received second related information data of the RRU protocol to the RRU device after forming a data packet in the uplink RRU protocol format, and the second related information data includes control words and IQ data; The microwave protocol conversion module is configured to map the received first related information data to a data frame in the downlink microwave protocol format and then transmit it, and receive the data frame in the uplink microwave protocol format and extract the second related information data therefrom . 7. A RRU microwave transmission conversion device, comprising: an RRU protocol conversion module connected to the RRU equipment, a microwave protocol conversion module connected to the microwave equipment: The RRU protocol conversion module is used to identify the data packet in the downlink RRU protocol format transmitted by the RRU, and extract the first relevant information data from the data packet in the downlink RRU protocol format, and the first relevant information data includes a control word, The IQ data is also used to send the received second related information data of the RRU protocol to the RRU device after forming a data packet in the uplink RRU protocol format, and the second related information data includes control words and IQ data; The microwave protocol conversion module is used to map the received basic frame format data of the downlink RRU protocol to the data frame of the downlink microwave protocol format and then transmit it, and receive the data frame of the uplink microwave protocol format and extract the data frame of the uplink RRU protocol therefrom Basic frame format data. 8. The RRU microwave transmission conversion device according to claim 6 or 7, characterized in that: It also includes: an N/M times extraction module and an N/M times interpolation module respectively connected between the RRU protocol conversion module and the microwave protocol conversion module, the input end of the N/M times extraction module is connected to the The RRU protocol conversion module is connected, the output end is connected with the microwave protocol conversion module, the input end of the N/M times interpolation module is connected with the microwave protocol conversion module, and the output end is converted with the RRU protocol The modules are connected; or Also includes: a data volume compression encoding module and a data recovery decoding module respectively connected between the RRU protocol conversion module and the microwave protocol conversion module, the input end of the data volume compression encoding module is connected to the RRU protocol conversion module connected, the output end is connected to the microwave protocol conversion module, the input end of the data recovery decoding module is connected to the microwave protocol conversion module, and the output end is connected to the RRU protocol conversion module; or It also includes: an N/M times extraction module serially connected between the RRU protocol conversion module and the microwave protocol conversion module, a data volume compression coding module, and an N/M times serial connection between the RRU protocol conversion module and the microwave protocol conversion module /M times interpolation module, data recovery decoding module, the input end of the N/M times extraction module is connected to the RRU protocol conversion module, the output end is connected to the input end of the data volume compression encoding module, and the The output end of the data volume compression encoding module is connected with the microwave protocol conversion module, the input end of the data recovery decoding module is connected with the microwave protocol conversion module, and the output end is connected with the N/M times interpolation module The input ends are connected, and the output ends of the N/M times interpolation module are connected with the RRU protocol conversion module. 9. The RRU microwave transmission conversion device according to claim 6 or 7 or 8, characterized in that: The RRU microwave transmission conversion device is realized by CPLD, FPGA, EPLD, DSP, or a dedicated ASIC chip; and / or The downlink RRU protocol format and the uplink RRU protocol format are IR protocol format, OBSAI protocol format or CPRI protocol format; and / or The downlink microwave protocol format and the uplink microwave protocol format are STM-N protocol formats, and the microwave protocol conversion module maps the control word of the first related information data to RSOH, AU-PTR, MSOH or In PAYLOAD, mapping the IQ data of the first related information data to the PAYLOAD of STM-N; and / or The downlink microwave protocol format and the uplink microwave protocol format are STM-N protocol format, and the microwave protocol conversion module maps the basic frame format data of the downlink RRU protocol into the PAYLOAD of the STM-N frame structure. 10. An RRU microwave transmission system, comprising: RRU equipment, microwave equipment, and the RRU microwave transmission conversion device according to any one of claims 6 to 9.

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