CN102149104B

CN102149104B - RRU (remote radio unit) microwave transmission transformation method and device as well as RRU microwave transmission system

Info

Publication number: CN102149104B
Application number: CN201110054821.XA
Authority: CN
Inventors: 许景兆
Original assignee: Comba Telecom Systems China Ltd
Current assignee: Comba Network Systems Co Ltd
Priority date: 2011-03-08
Filing date: 2011-03-08
Publication date: 2015-02-11
Anticipated expiration: 2031-03-08
Also published as: CN102149104A

Abstract

The invention discloses an RRU (remote radio unit) microwave transmission switching method and a device as well as an RRU microwave transmission system. The scheme is as follows: first relevant information data of an RRU device is identified and extracted through interconnection with the RRU device; the first relevant information data comprises control characters and IQ data; moreover, the first relevant information data of an RRU protocol or the data frame of a RRU protocol format is mapped to a data frame of a microwave protocol format to realize the interconnection and intercommunication with a microwave device; in this way, seamless connection between the RRU and the microwave device is realized; in case of insufficient optical fiber resources, optical transmission can be combined with microwave transmission to implement signal transmission according to the scheme, so as to satisfy the demands of wireless signal covering in case of insufficient optical fiber resources.

Description

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

Technical field

The present invention relates to communication technical field, particularly a kind of RRU microwave transmission conversion method, a kind of RRU microwave transmission conversion equipment and a kind of RRU microwave transmission system.

Background technology

Growing along with mobile communication technology, the number of users of mobile communication also sharply increases, and makes operator have to carry out dilatation process to mobile communication system, to meet the communication requirement of user.The transmission means of existing mobile communication, wherein one adopts optical fiber to carry out Signal transmissions, illustrate in Fig. 1 that the existing optical fiber that utilizes carries out the interconnected application schematic diagram carrying out Signal transmissions to equipment, as shown in Figure 1, in existing scheme, REC equipment (main equipment), by Fiber connection RE equipment (from equipment), realizes the transmission of signal data by the communication between REC equipment and RE equipment.But this communication mode, depends on the laying of optical fiber, under the covering scene that some fiber resources lack, such as mountain area, disaster field, the community not having fiber resource etc., signal cannot cover, and this communication mode of application thus also cannot be used to carry out Signal transmissions.

Summary of the invention

For above-mentioned problems of the prior art, the object of the present invention is to provide a kind of RRU microwave transmission conversion method, RRU microwave transmission conversion equipment and a kind of RRU microwave transmission system, it can realize the seamless link of RRU device and microwave equipment, can meet the demand that the wireless signal in the not enough situation of fiber resource covers.

For achieving the above object, the present invention by the following technical solutions:

A kind of RRU microwave transmission conversion method, comprises step:

Identify the packet of the descending RRU protocol format of RRU transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, launch after this first relevant information data being mapped to the Frame of descending microwave protocol format, the described first relevant information packet draws together control word, I/Q data;

Receive the Frame of up microwave protocol format, from the Frame of this up microwave protocol format, extract the second relevant information data of RRU agreement, and send to described RRU after this second relevant information data being formed the packet of up RRU protocol format;

After extracting the first relevant information data, before the Frame that this first relevant information data is mapped to descending microwave protocol format, also comprise step: N/M is carried out to this first relevant information data and doubly extracts process;

After the second relevant information data being extracted RRU agreement, before the packet that this second relevant information data formed up RRU protocol format, also comprise step: N/M times of interpolation process is carried out to this second relevant information data;

Or

After extracting the first relevant information data, before the Frame that this first relevant information data is mapped to descending microwave protocol format, also comprise step: compressed encoding process is carried out to this first relevant information data;

Wherein the step that this first relevant information data carries out compressed encoding process is comprised: according to formula: the input bandwidth determination compression ratio of the output bandwidth/optical fiber of microwave; Described first relevant information data is carried out compressed encoding according to described compression ratio;

After the second relevant information data being extracted RRU agreement, before the packet that this second relevant information data formed up RRU protocol format, also comprise step: decoding decompression is carried out to this second relevant information data;

Or

After extracting the first relevant information data, before the Frame that this first relevant information data is mapped to descending microwave protocol format, also comprise step: N/M is carried out successively to this first relevant information data and doubly extracts process, compressed encoding process;

After the second relevant information data being extracted RRU agreement, before the packet that this second relevant information data formed up RRU protocol format, also comprise step: decoding decompression, N/M times interpolation process are carried out successively to this second relevant information data.

A kind of RRU microwave transmission conversion method, comprises step:

Identify the packet of the descending RRU protocol format of RRU transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, first relevant information data is merged into the basic frame format data of descending RRU agreement, launched after the Frame of descending microwave protocol format by the basic frame format data-mapping of this descending RRU agreement, the described first relevant information packet draws together control word, I/Q data;

Receive the Frame of up microwave protocol format, from the Frame of this up microwave protocol format, extract the basic frame format data of up RRU agreement, and send to described RRU after the basic frame format data of this up RRU agreement are formed the packet of up RRU protocol format;

Merge into the basic frame format data of descending RRU agreement after extracting the first relevant information data, by this first relevant information data before, also comprise step: N/M is carried out to this first relevant information data and doubly extracts process;

The step that the basic frame format data of up RRU agreement form the packet of up RRU protocol format is specifically comprised: the second relevant information data extracting RRU agreement from the Frame of up microwave protocol format, N/M times of interpolation process is carried out to this second relevant information data, the second relevant information data after N/M times of interpolation process is formed the packet of up RRU protocol format;

Or

Merge into the basic frame format data of descending RRU agreement after extracting the first relevant information data, by this first relevant information data before, also comprise step: compressed encoding process is carried out to this first relevant information data;

The step that the basic frame format data of up RRU agreement form the packet of up RRU protocol format is specifically comprised: the second relevant information data extracting RRU agreement from the Frame of up microwave protocol format, decoding decompression is carried out to this second relevant information data, the second relevant information data after decoding decompression is formed the packet of up RRU protocol format;

Or

Merge into the basic frame format data of descending RRU agreement after being extracted out the first relevant information data, by this first relevant information data before, also comprise step: N/M is carried out successively to this first relevant information data and doubly extracts process, compressed encoding process;

The step that the basic frame format data of up RRU agreement form the packet of up RRU protocol format is specifically comprised: the second relevant information data extracting RRU agreement from the Frame of up microwave protocol format, decoding decompression, N/M times interpolation process are carried out successively to this second relevant information data, the second relevant information data after N/M times of interpolation process is formed the packet of up RRU protocol format.

A kind of RRU microwave transmission conversion equipment, comprising: the RRU protocol conversion module be connected with RRU device, the microwave protocol conversion module be connected with microwave equipment:

Described RRU protocol conversion module, for identifying the packet of the descending RRU protocol format that RRU transmits, the first relevant information data is extracted from the packet of this descending RRU protocol format, described first relevant information packet draws together control word, I/Q data, send to RRU device after also forming the packet of up RRU protocol format for the second relevant information data of the RRU agreement by reception, the described second relevant information packet draws together control word, I/Q data;

Described microwave protocol conversion module, for the receive first relevant information data is mapped to descending microwave protocol format Frame after launch and receive the Frame of up microwave protocol format and therefrom extract described second relevant information data;

Also comprise: be connected to N/M times of abstraction module between described RRU protocol conversion module and described microwave protocol conversion module, N/M times interpose module, the input of described N/M times abstraction module is connected with described RRU protocol conversion module, output is connected with described microwave protocol conversion module, and the input of described N/M times interpose module is connected with described microwave protocol conversion module, output is connected with described RRU protocol conversion module;

Or

Also comprise: be connected to data volume compressed encoding module, the date restoring decoder module between described RRU protocol conversion module and described microwave protocol conversion module, the input of described data volume compressed encoding module is connected with described RRU protocol conversion module, output is connected with described microwave protocol conversion module, and the input of described date restoring decoder module is connected with described microwave protocol conversion module, output is connected with described RRU protocol conversion module;

Wherein data volume compressed encoding module is according to formula: the input bandwidth determination compression ratio of the output bandwidth/optical fiber of microwave, then described first relevant information data is carried out compressed encoding according to described compression ratio;

Or

Also comprise: be serially connected with N/M times of abstraction module between RRU protocol conversion module and microwave protocol conversion module successively, data volume compressed encoding module, and the N/M times of interpose module be serially connected with successively between RRU protocol conversion module and microwave protocol conversion module, date restoring decoder module, the input of described N/M times abstraction module is connected with described RRU protocol conversion module, output is connected with the input of described data volume compressed encoding module, the output of described data volume compressed encoding module is connected with described microwave protocol conversion module, the input of described date restoring decoder module is connected with described microwave protocol conversion module, output is connected with the input of described N/M times interpose module, the output of described N/M times interpose module is connected with described RRU protocol conversion module,

Described RRU microwave transmission conversion equipment adopts CPLD, FPGA, EPLD, DSP or special asic chip to realize;

And/or

Described descending RRU protocol format, described up RRU protocol format are IR protocol format, OBSAI protocol format or CPRI protocol format;

And/or

Described descending microwave protocol format, up microwave protocol format are STM-N protocol format, described microwave protocol conversion module, the control word of the first relevant information data is mapped in RSOH, AU-PTR, MSOH or PAYLOAD of STM-N frame structure, the I/Q data of the first relevant information data is mapped in the PAYLOAD of STM-N.

Described microwave protocol conversion module, for launching after the basic frame format data-mapping of the descending RRU agreement received to the Frame of descending microwave protocol format and receive the Frame of up microwave protocol format and therefrom extract the basic frame format data of up RRU agreement;

Or

And/or

Described descending microwave protocol format, up microwave protocol format are STM-N protocol format, described microwave protocol conversion module, by the basic frame format data-mapping of this descending RRU agreement in the PAYLOAD of STM-N frame structure.

A kind of RRU microwave transmission system, comprising: RRU device, microwave equipment and RRU microwave transmission conversion equipment as above.

According to the scheme of the invention described above, it is by interconnected with RRU device, identify and extract the first relevant information data of RRU device, and the first relevant information data of RRU agreement or the Frame of RRU protocol format are mapped in the Frame of microwave protocol format go, realization is interconnected with microwave equipment, thus the seamless link realized accordingly between RRU and microwave equipment, when fiber resource deficiency, according to the present invention program Optical Fiber Transmission can be combined with microwave transmission and carry out Signal transmissions, the demand that the wireless signal in the not enough situation of fiber resource covers can be met.

Accompanying drawing explanation

Fig. 1 is that the existing optical fiber that utilizes carries out the interconnected application schematic diagram carrying out Signal transmissions to equipment;

Fig. 2 is the handling process schematic diagram on the down direction of RRU microwave transmission conversion method embodiment one of the present invention;

Fig. 3 is the handling process schematic diagram on the up direction of RRU microwave transmission conversion method embodiment one of the present invention;

Fig. 4 is the handling process schematic diagram on the down direction of RRU microwave transmission conversion method embodiment two of the present invention;

Fig. 5 is the handling process schematic diagram on the up direction of RRU microwave transmission conversion method embodiment two of the present invention;

Fig. 6 is schematic diagram RRU microwave transmission conversion equipment of the present invention being applied to traditional fibre optic transmission equipment;

Fig. 7 is the structural representation of RRU microwave transmission conversion equipment embodiment one of the present invention;

Fig. 8 is the structural representation of RRU microwave transmission conversion equipment embodiment two of the present invention;

Fig. 9 is the structural representation of RRU microwave transmission conversion equipment embodiment three of the present invention;

Figure 10 is the structural representation of RRU microwave transmission conversion equipment embodiment four of the present invention;

Figure 11 is schematic diagram CPRI frame being mapped to a kind of implementation in STM-N of the present invention.

Embodiment

The basic goal of the present invention program, want to realize interconnecting between RRU device and microwave equipment, for this reason, central idea of the present invention, transmit in the Frame of the protocol format that the transmission data-mapping of RRU device is adopted to microwave equipment, to realize the seamless fusion of transfer of data between RRU device and microwave equipment, based on different Considerations, the mode adopted when mapping can be different, is described in detail below in conjunction with each embodiment.

Below first each embodiment of RRU microwave transmission conversion method of the present invention is described in detail.

Embodiment one

The RRU microwave transmission conversion method provided in the embodiment of the present invention one, be map as a whole the basic frame format data of the RRU agreement of RRU device, it comprises step:

Receive the Frame of up microwave protocol format, from the Frame of this up microwave protocol format, extract the basic frame format data of up RRU agreement, and send to described RRU after the basic frame format data of this up RRU agreement are formed the packet of up RRU protocol format.

Wherein, the step in above-mentioned RRU microwave transmission conversion method, is that the transmission combined on uplink and downlink direction is described, is just described respectively in conjunction with the processing mode on down direction, up direction below.It should be noted that, in following elaboration illustrates, down direction refers to the direction of RRU to microwave transmission data, and up direction refers to that microwave transmits the direction of data to RRU.

As shown in Figure 2, be RRU microwave transmission conversion method embodiment one of the present invention down direction on handling process schematic diagram, it comprises step:

Step S1011: the packet (being referred to as the packet of descending RRU protocol format, to distinguish with the packet of up direction, hereinafter identical) identifying the RRU protocol format of RRU transmission, enters step S1012;

Step S1012: extract the first relevant information data from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, enters step S1013;

Step S1013: the basic frame format data (being referred to as the basic frame format data of descending RRU agreement, to distinguish with the carrying out of up direction, hereinafter identical) this first relevant information data being merged into RRU agreement, enter step S1014;

Step S1014: the basic frame format data-mapping of this descending RRU agreement (is referred to as the Frame of descending microwave protocol format to the Frame of microwave protocol format, to distinguish with the Frame of up direction, hereinafter identical) after launch.

Handling process schematic diagram on the up direction of RRU microwave transmission conversion method embodiment one of the present invention has been shown in Fig. 3, and it comprises step:

Step S1021: the Frame (being referred to as the Frame of up microwave protocol format, to distinguish with the Frame on down direction, hereinafter identical) receiving microwave protocol format, enters step S1022;

Step S1022: the basic frame format data extracting RRU agreement from the Frame of this up microwave protocol format (are referred to as the basic frame format data of up RRU agreement, with with the differentiation mutually on down direction, hereinafter identical), enter step S1023;

Step S1023: the packet of the basic frame format data composition RRU protocol format of this up RRU agreement (is referred to as the packet of up RRU protocol format, to distinguish with the packet on down direction, hereinafter identical) after send to described RRU.

According to this processing mode, in the downstream direction, by identifying the packet of the descending RRU protocol format of RRU transmission, and therefrom extract the first relevant information data, the Frame of descending microwave protocol format is mapped to after this first relevant information data being merged into the basic frame format data of descending RRU agreement, thus the conversion realized between RRU protocol format and microwave protocol format, the RRU realized on down direction changes with the transmission between microwave and communicates; In the upstream direction, Frame due to the up microwave protocol format received is the basic frame format data that have mapped RRU agreement, therefore, therefrom can extract the basic frame format data of up RRU agreement, and send to RRU after the basic frame format data of this up RRU agreement are formed the packet of up RRU agreement, thus the conversion realized between microwave protocol format and RRU protocol format, the microwave realized on up direction is changed with the transmission between RRU and communicates.

Because the sampling rate of I/Q data is different according to different system, consider the difference of system configuration, RRU device is normally by Optical Fiber Transmission data, and microwave equipment is normally with microwave transmission data, the transmission rate of RRU device and microwave equipment is different, normally the fiber-optic transmission rate of RRU device is high, the microwave transmission speed of microwave equipment is low, therefore, in order to the transmission rate that the I/Q data of extraction can be enable to be adapted to microwave equipment, need to carry out data pick-up process, therefore, between above-mentioned steps S1012 and step S1013, also comprise step:

Step S10121: N/M is carried out to this first relevant information data extracted and doubly extracts process.Wherein, when carrying out N/M and doubly extracting process, any process can not be carried out for control word.

Correspondingly, in the upstream direction, in order to the transmission rate that the I/Q data in the basic frame format data of the up RRU agreement of extraction can be made to be adapted to RRU device, then need to carry out interpolation of data process, therefore, in above-mentioned steps S1022, after the basic frame format data extracting up RRU agreement, the second relevant information data of RRU agreement is also gone out from the basic frame format extracting data of this up RRU agreement, this second relevant information packet draws together control word, I/Q data, between above-mentioned steps S1022 and step S1023, also comprise step:

Step S10222: N/M times of interpolation process is carried out to this second relevant information data.

Now, in above-mentioned steps S1023, be by N/M times of interpolation process after the second relevant information data form the packet of up RRU protocol format.

In addition, consider that the transmittability of Optical Fiber Transmission energy force rate microwave is large, thus also need the coupling of carrying out bandwidth, compressed encoding is carried out to the Frame of RRU protocol format, therefore, between above-mentioned steps S1012 and step S1013, also comprises step:

Step S10122: compressed encoding process is carried out to this first relevant information data extracted.

Correspondingly, in the upstream direction, in above-mentioned steps S1022, after the basic frame format data extracting up RRU agreement, the second relevant information data of RRU agreement is also gone out from the basic frame format extracting data of this up RRU agreement, this second relevant information packet draws together control word, I/Q data, between above-mentioned steps S1022 and step S1023, also comprises step:

Step S10221: decompression decoding process is carried out to this second relevant information data.

Now, in above-mentioned steps S1023, be by the decoding process that decompresses after the second relevant information data form the packet of up RRU protocol format.

Wherein, when do not consider transmission rate between system difference, do not carry out N/M doubly extract process, do not carry out N/M times of interpolation process, in the downstream direction, the process of this compressed encoding process directly processes this first relevant information data extracted in above-mentioned steps S1012 step, in the upstream direction, the process of this compressed encoding process directly processes the second relevant information data extracted in above-mentioned steps S1022 step.

And when consider transmission rate between system difference, carry out N/M doubly extract process, N/M times interpolation process, in the downstream direction, the process of this compressed encoding process doubly extracts the first relevant information data after process to N/M in above-mentioned steps S10121 to carry out compressed encoding process, in the upstream direction, be after the second relevant information data extracted in above-mentioned steps S1022 carries out this decompression decoding process, then enter above-mentioned steps S10222 and carry out N/M times of interpolation process.

Embodiment two

The RRU microwave transmission conversion method provided in the embodiment of the present invention two, be consider to map respectively the control word of the RRU agreement of RRU device, I/Q data, it comprises step:

Receive the Frame of up microwave protocol format, from the Frame of this up microwave protocol format, extract the second relevant information data of RRU agreement, and send to described RRU after this second relevant information data being formed the packet of up RRU protocol format.

As shown in Figure 4, be RRU microwave transmission conversion method embodiment two of the present invention down direction on handling process schematic diagram, it comprises step:

Step S2011: the packet identifying the descending RRU protocol format of RRU transmission, enters step S2012;

Step S2012: extract the first relevant information data from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, enters step S2013;

Step S2013: launch after this first relevant information data being mapped to the Frame of descending microwave protocol format.

Handling process schematic diagram on the up direction of RRU microwave transmission conversion method embodiment two of the present invention has been shown in Fig. 5, and it comprises step:

Step S2021: the Frame receiving up microwave protocol format, enters step S2022;

Step S2022: the second relevant information data extracting RRU agreement from the Frame of this up microwave protocol format, this second pass information data comprises control word, I/Q data, enters step S2023;

Step S2023: send to described RRU after this second relevant information data being formed the packet of up RRU protocol format.

According to this processing mode, in the downstream direction, by identifying the packet of the descending RRU protocol format of RRU transmission, and therefrom extract the first relevant information data, this first relevant information data is mapped to the Frame of descending microwave protocol format, thus the conversion realized between RRU protocol format and microwave protocol format, the RRU realized on down direction changes with the transmission between microwave and communicates; In the upstream direction, because the Frame of the up microwave protocol format received have mapped the first relevant information data, therefore, can therefrom extract the second relevant information data, and send to RRU after this second relevant information data being formed the packet of up RRU agreement, thus the conversion realized between microwave protocol format and RRU protocol format, the microwave realized on up direction is changed with the transmission between RRU and communicates.

With similar in above-described embodiment one, in order to the transmission rate that the I/Q data of extraction can be enable to be adapted to microwave equipment, need to carry out data pick-up process, therefore, between above-mentioned steps S2012 and step S2013, also comprise step:

Step S20121: N/M is carried out to this first relevant information data extracted and doubly extracts process.Wherein, when carrying out N/M and doubly extracting process, any process can not be carried out for control word.

Correspondingly, in the upstream direction, between above-mentioned steps S2022 and step S2023, also step is comprised:

Step S20222: N/M times of interpolation process is carried out to this second relevant information data.

In addition, with similar in above-described embodiment one, consider the variability issues of the transmittability of Optical Fiber Transmission ability and microwave, therefore, between above-mentioned steps S2012 and step S2013, also comprise step:

Step S20122: compressed encoding process is carried out to this first relevant information data extracted.

Step S20221: decompression decoding process is carried out to this second relevant information data.

Wherein, with similar in above-described embodiment one, when do not consider transmission rate between system difference, do not carry out N/M doubly extract process, do not carry out N/M times of interpolation process, in the downstream direction, the process of this compressed encoding process directly processes this first relevant information data extracted in above-mentioned steps S2012 step, in the upstream direction, the process of this compressed encoding process directly processes the second relevant information data extracted in above-mentioned steps S2022 step.

And when consider transmission rate between system difference, carry out N/M doubly extract process, N/M times interpolation process, in the downstream direction, the process of this compressed encoding process doubly extracts the first relevant information data after process to N/M in above-mentioned steps S20121 to carry out compressed encoding process, in the upstream direction, be after the second relevant information data extracted in above-mentioned steps S2022 carries out this decompression decoding process, then enter in above-mentioned steps S20222 and carry out N/M times of interpolation process.

According to the RRU microwave transmission conversion method of the invention described above, the invention provides a kind of RRU microwave transmission conversion equipment, schematic diagram RRU microwave transmission conversion equipment of the present invention being applied to traditional fibre optic transmission equipment has been shown in Fig. 6, by applying RRU microwave transmission conversion equipment of the present invention, RRU device and microwave equipment can be linked together through this RRU microwave transmission conversion equipment, play respective advantage, solve the problem of quorum sensing inhibitor.

According to the application schematic diagram of Fig. 6, in concrete data handling procedure, its flow chart of data processing is:

The data of REC equipment by Optical Fiber Transmission to RRU microwave transmission conversion equipment;

After the data that REC equipment sends process by RRU microwave transmission conversion equipment, be converted to the data format of the microwave agreement that microwave equipment can identify, and send microwave equipment to;

Subsequently, the data that RRU microwave transmission conversion equipment is sent to by microwave equipment are transferred on the microwave equipment of destination by microwave;

The microwave equipment of destination reduces to the data received, and the data after reduction are sent into RRU microwave transmission conversion equipment;

RRU microwave transmission conversion equipment is converted to the data of the RRU protocol format that RRU device can identify, exports to RE equipment by optical fiber after processing the data after the reduction received.

When RRU device and microwave equipment being linked together by RRU microwave transmission conversion equipment, this RRU microwave transmission conversion equipment can have different implementations, and just each embodiment of RRU microwave transmission conversion equipment of the present invention is described in detail below.

Embodiment one

The structural representation of RRU microwave transmission conversion equipment embodiment one of the present invention has been shown in Fig. 7.As shown in Figure 7, RRU microwave transmission conversion equipment of the present invention comprises: the RRU protocol conversion module be connected with RRU device, the microwave protocol conversion module be connected with microwave equipment, wherein, RRU protocol conversion module, interconnected for what complete with RRU device, extract the relevant information of RRU device, microwave protocol conversion module, for completing and the interconnecting of microwave equipment, realize the mapping between the basic frame format data of RRU protocol format and the Frame of microwave protocol format.

According to the RRU microwave transmission conversion equipment in the present embodiment, according to different Considerations, concrete processing mode can difference to some extent, and just several processing procedures are wherein described in detail below.

Wherein in a kind of concrete communication process, its concrete processing procedure can be:

In the downstream direction:

RRU protocol conversion module receives and identifies the packet of the descending RRU protocol format that RRU is come by Optical Fiber Transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, sends to microwave protocol conversion module after then this first relevant information data extracted being merged into the basic frame format data of descending RRU agreement;

After microwave protocol conversion module receives, by the Frame of the basic frame format data-mapping of this descending RRU agreement to descending microwave protocol format, realize the seamless fusion of RRU protocol format and microwave protocol format, then the dataframe of the descending microwave protocol format after mapping is gone out;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, from the Frame of this up microwave protocol format, extract the basic frame format data of up RRU agreement, and the basic frame format data of this up RRU agreement are sent to RRU protocol conversion module;

After RRU protocol conversion module receives the basic frame format data of this up RRU agreement, the basic frame format data of this up RRU agreement are formed the packet of up RRU protocol format, and by the Packet Generation of this up RRU protocol format to RRU.

In the communication process that another is concrete, its concrete processing procedure can be:

In the downstream direction:

RRU protocol conversion module receives and identifies the packet of the descending RRU protocol format that RRU is come by Optical Fiber Transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, sends to microwave protocol conversion module after then this first relevant information data extracted being merged into the Frame of descending RRU protocol format;

After microwave protocol conversion module receives, the first relevant information data is gone out from the basic frame format extracting data of this descending RRU agreement, and this first relevant information data is mapped to the Frame of descending microwave protocol format, realize the seamless fusion of RRU protocol format and microwave protocol format, then the dataframe of the descending microwave protocol format after mapping is gone out;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, IQ information, and sends to RRU protocol conversion module after this second relevant information being consisted of the basic frame format data of up RRU agreement;

After RRU protocol conversion module receives this second relevant information data, this second relevant information data is formed the packet of up RRU protocol format, and by the Packet Generation of this up RRU protocol format to RRU.

In the downstream direction:

RRU protocol conversion module receives and identifies the packet of the descending RRU protocol format that RRU is come by Optical Fiber Transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, then this first relevant information data extracted is sent to microwave protocol conversion module;

After microwave protocol conversion module receives, this first relevant information data is mapped to the Frame of descending microwave protocol format, realize the seamless fusion of RRU protocol format and microwave protocol format, then the dataframe of the descending microwave protocol format after mapping is gone out;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data of RRU agreement is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, I/Q data, and this second relevant information data is sent to RRU protocol conversion module;

Embodiment two

As shown in Figure 8, be the structural representation of RRU microwave transmission conversion equipment embodiment two of the present invention, in the present embodiment, be mainly with the difference of the scheme of above-described embodiment one, the RRU microwave transmission conversion equipment in the present embodiment also comprises:

Be connected to N/M times of abstraction module between RRU protocol conversion module and microwave protocol conversion module, N/M times interpose module, wherein, the input of N/M times of abstraction module is connected with RRU protocol conversion module, output is connected with microwave protocol conversion module, and the input of N/M times of interpose module is connected with microwave protocol conversion module, output is connected with RRU protocol conversion module.According to the difference of different system requirements or performance requirement, the configuration of the extraction parameter of N/M times of abstraction module, the interpolated parameter of N/M times interpose module also can be different, to complete the access requirement of the RRU device of different baseband rate.

In the present embodiment, consider that the sampling rate of I/Q data is difference according to system and different, the configuration of different system can be different, RRU device is normally by Optical Fiber Transmission data, microwave equipment is normally with microwave transmission data, and the transmission rate of RRU device and microwave equipment is different, normally the fiber-optic transmission rate of RRU device microwave transmission speed that is high, microwave equipment is low, therefore carried out extracting process, interpolation process to data, can match with the transmission rate of corresponding system to make the transmission rate of the Frame after processing.

According to the RRU microwave transmission conversion equipment in the present embodiment, according to different Considerations, concrete processing mode can difference to some extent, and just three kinds of processing modes are wherein described in detail below.

The first processing mode:

In the downstream direction:

RRU protocol conversion module receives and identifies the packet of the descending RRU protocol format that RRU is come by Optical Fiber Transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, then this first relevant information data extracted is sent to N/M times of abstraction module;

After N/M times of abstraction module receives, according to N, M value that different system requirements or performance requirement configure, N/M is extracted doubly from the I/Q data of the first relevant information data received, to meet the access requirement of the baseband rate of microwave equipment, and send to microwave protocol conversion module by extracting after the first relevant information data after processing merges into the Frame of descending RRU protocol format;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, from the Frame of this up microwave protocol format, extract the basic frame format data of up RRU agreement, and the basic frame format data of this up RRU agreement are sent to N/M times of interpose module;

After N/M times of interpose module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, this second relevant information packet draws together control word, I/Q data, according to N, M value that different system requirements or performance requirement configure, to the I/Q data interpolation N/M in the second relevant information data doubly, to meet the access requirement of the speed of RRU device, and the second relevant information data after interpolation process is sent to RRU protocol conversion module;

The processing mode of the second:

In the downstream direction:

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, IQ information, and sends to N/M times of interpose module after this second relevant information being consisted of the basic frame format data of up RRU agreement;

After N/M times of interpose module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, according to N, M value that different system requirements or performance requirement configure, to the I/Q data interpolation N/M in the second relevant information data doubly, to meet the access requirement of the speed of RRU device, and the second relevant information data after interpolation process is sent to RRU protocol conversion module;

The third processing mode can be:

In the downstream direction:

After N/M times of abstraction module receives, according to N, M value that different system requirements or performance requirement configure, N/M is extracted doubly from the I/Q data of the first relevant information data received, to meet the access requirement of the baseband rate of microwave equipment, and the first relevant information data after extracting process is sent to microwave protocol conversion module;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data of RRU agreement is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, I/Q data, and this second relevant information data is sent to N/M times of interpose module;

After N/M times of interpose module receives, according to N, M value that different system requirements or performance requirement configure, to the I/Q data interpolation N/M in the second relevant information data doubly, to meet the access requirement of the speed of RRU device, and the second relevant information data after interpolation process is sent to RRU protocol conversion module;

Embodiment three

As shown in Figure 9, be the structural representation of RRU microwave transmission conversion equipment embodiment three of the present invention, in the present embodiment, be mainly with the difference of the scheme of above-described embodiment one, the RRU microwave transmission conversion equipment in the present embodiment also comprises:

Be connected to data volume compressed encoding module, the date restoring decoder module between RRU protocol conversion module and microwave protocol conversion module, wherein, the input of data volume compressed encoding module is connected with RRU protocol conversion module, output is connected with microwave protocol conversion module, and the input of date restoring decoder module is connected with microwave protocol conversion module, output is connected with RRU protocol conversion module.

In the present embodiment, consider RRU device usually by Optical Fiber Transmission data, and microwave equipment is usually by microwave transmission data, its transmittability is normally limited, the transmittability of Optical Fiber Transmission energy force rate microwave is large, thus carries out compressed encoding by the process of compressed encoding, and the data after processing can be matched with corresponding bandwidth, meet the transmission requirement of corresponding system, improve data transmission efficiency.

Because the data volume of coming through optical fiber is very huge, suppose that its capacity is A, and the transmittability of microwave system is limited, suppose that its capacity is B, so compression ratio is needs A* (B/A)=B that B/A could meet bandwidth match, the dynamic calculated data amount of data volume compressed encoding module, according to input bandwidth A, output bandwidth B, B/A compressed encoding is doubly carried out to data, remove the transmission bandwidth mating microwave, choose best compression ratio, reduce the problem of the signal quality decline brought because Microwave bandwidth is not enough, finally meet the transmission requirement of microwave system.

The inverse process of the data volume compressed encoding resume module process that date restoring decoder module performs.

The first processing mode:

In the downstream direction:

RRU protocol conversion module receives and identifies the packet of the descending RRU protocol format that RRU is come by Optical Fiber Transmission, the first relevant information data is extracted from the packet of this descending RRU protocol format, this first relevant information packet draws together control word, I/Q data, then this first relevant information data extracted is sent to data volume compressed encoding module;

After data volume compressed encoding module receives, according to the transmittability of RRU and the transmittability of microwave equipment, compressed encoding is carried out to this first relevant information data received, to meet the transmission requirement of microwave system, after then the first relevant information data after compressed encoding being combined as the basic frame format data of descending RRU agreement, send to microwave protocol conversion module;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, from the Frame of this up microwave protocol format, extract the basic frame format data of up RRU agreement, and the basic frame format data of this up RRU agreement are sent to date restoring decoder module;

After date restoring decoder module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, this second relevant information packet draws together control word, I/Q data, to basic frame format decoding data, the decompression of this up RRU agreement, to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to RRU protocol conversion module;

The processing mode of the second:

In the downstream direction:

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, IQ information, and sends to date restoring decoder module after this second relevant information being consisted of the basic frame format data of up RRU agreement;

After date restoring decoder module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, to basic frame format decoding data, the decompression of this up RRU agreement, to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to RRU protocol conversion module;

The third processing mode can be:

In the downstream direction:

After data volume compressed encoding module receives, according to the transmittability of RRU and the transmittability of microwave equipment, compressed encoding is carried out to this first relevant information data received, to meet the transmission requirement of microwave system, then the first relevant information data after compressed encoding is sent to microwave protocol conversion module;

In the upstream direction:

Microwave protocol conversion module receives the Frame of the up microwave protocol format that microwave equipment sends, the second relevant information data of RRU agreement is extracted from the Frame of this up microwave protocol format, this second relevant information packet draws together control word, I/Q data, and this second relevant information data is sent to date restoring decoder module;

Date restoring decoder module to be decoded to this second relevant information data, decompression after receiving, and to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to RRU protocol conversion module;

Embodiment four

As shown in Figure 10, be the structural representation of RRU microwave transmission conversion equipment embodiment four of the present invention, in the present embodiment, be mainly with the difference of the scheme of above-described embodiment one, the RRU microwave transmission conversion equipment in the present embodiment also comprises:

Be connected to N/M times of abstraction module between RRU protocol conversion module and microwave protocol conversion module, N/M times of interpose module, also comprise the data volume compressed encoding module be connected between N/M times of abstraction module and microwave protocol conversion module, be connected to the date restoring decoder module between N/M times of interpose module and microwave protocol conversion module, wherein, the input of N/M times of abstraction module is connected with RRU protocol conversion module, output is connected with the input of data volume compressed encoding module, the output of data volume compressed encoding module is connected with microwave protocol conversion module, the input of date restoring decoder module is connected with microwave protocol conversion module, output is connected with the input of N/M times of interpose module, the output of N/M times of interpose module is connected with RRU protocol conversion module.

In the present embodiment, consider that the sampling rate of I/Q data is difference according to system and different, the configuration of different system can be different, RRU device is normally by Optical Fiber Transmission data, microwave equipment is normally with microwave transmission data, and the transmission rate of RRU device and microwave equipment is different, normally the fiber-optic transmission rate of RRU device is high, the microwave transmission speed of microwave equipment is low, therefore carried out extracting process to data, interpolation process, can match with the transmission rate of corresponding system to make the transmission rate of the Frame after processing.Also consider simultaneously, RRU device is usually by Optical Fiber Transmission data, and microwave equipment is usually by microwave transmission data, its transmittability is normally limited, the transmittability of Optical Fiber Transmission energy force rate microwave is large, thus carries out compressed encoding by the process of compressed encoding, and the data after processing can be matched with corresponding bandwidth, meet the transmission requirement of corresponding system, improve data transmission efficiency.

According to the difference of different system requirements or performance requirement, the configuration of the extraction parameter of N/M times of abstraction module, the interpolated parameter of N/M times interpose module also can be different, to complete the access requirement of the RRU device of different baseband rate.

Because the data volume of coming through optical fiber is very huge, suppose that its capacity is A, and the transmittability of microwave system is limited, suppose that its capacity is B, so compression ratio is needs A* (B/A)=B that B/A could meet bandwidth match, the dynamic calculated data amount of data volume compressed encoding module, according to input bandwidth A, output bandwidth B, B/A compressed encoding is doubly carried out to data, remove the transmission bandwidth mating microwave, choose best compression ratio, reduce the problem of the signal quality decline brought because Microwave bandwidth is not enough, finally meet the transmission requirement of microwave system.The inverse process of the data volume compressed encoding resume module process that date restoring decoder module performs.

The first processing mode:

In the downstream direction:

After N/M times of abstraction module receives, according to N, M value that different system requirements or performance requirement configure, N/M is extracted doubly from the I/Q data of the first relevant information data received, to meet the access requirement of the baseband rate of microwave equipment, and the first relevant information data after extracting process is sent to data volume compressed encoding module;

In the upstream direction:

After date restoring decoder module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, this second relevant information packet draws together control word, I/Q data, to basic frame format decoding data, the decompression of this up RRU agreement, to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to N/M times of interpose module;

The processing mode of the second:

In the downstream direction:

In the upstream direction:

After date restoring decoder module receives, the second relevant information data is gone out from the basic frame format extracting data of the up RRU agreement received, to basic frame format decoding data, the decompression of this up RRU agreement, to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to N/M times of interpose module;

The third processing mode can be:

In the downstream direction:

In the upstream direction:

Date restoring decoder module to be decoded to this second relevant information data, decompression after receiving, and to meet the transmission requirement of RRU device, then the second relevant information data after decoding decompression is sent to N/M times of interpose module;

RRU microwave transmission conversion equipment in each embodiment of the invention described above can be adopt the programmable logic devices such as CPLD, FPGA, EPLD, DSP to realize, and also can be adopt special asic chip to realize.

The transmission means of current RRU, different vendor has different selections, these RRU transmission meanss can be IR agreement, OBSAI agreement, CPRI transmission means, therefore, according to the difference of the transmission means selected, above-mentioned descending RRU protocol format, up RRU protocol format can be IR protocol format, OBSAI protocol format, CPRI protocol format.And for the transmission means between microwave equipment and microwave equipment, owing to being P2P transmission, any one transmission means can being adopted, both can adopt existing transmission means, also can adopt the transmission means between the microwave oneself developed.Transmission means between microwave general at present all adopts STM-N agreement, and therefore, when adopting STM-N agreement to carry out microwave transmission, above-mentioned descending microwave protocol format, up microwave protocol format are STM-N protocol format.

The transmission means of current RRU, major part selects CPRI to transmit, and microwave transmission mode major part uses STM-N transmission, therefore, below for RRU transmission means for CPRI transmission (namely descending RRU protocol format, up RRU protocol format are CPRI protocol format), microwave transmission mode are STM-N transmission means (namely descending microwave protocol format, up microwave protocol format are STM-N protocol format), in conjunction with the RRU microwave transmission conversion equipment in above-described embodiment four, its first working method is described in detail.

First, for CPRI transmission means, the basic frame structure of the CPRI for standard, its different CPRI speed is come by configuring different T (15*T) values, such as: if the CPRI speed of 614.4Mbit/s, be then 15*8; If the CPRI speed of 1228.8Mbit/s, be then 15*16; If the CPRI speed of 2457.6Mbit/s, be then 15*32; Remaining by that analogy.The basic frame structure of 256 CPRI can form the superframe of a CPRI, 150 superframes just can form the radio frames (also can be described as CPRI10ms frame) of a CPRI, optical fiber transmits be packing after the CPRI superframe be made up of 256 basic frames.

So, on downlink transmission direction, because the RRU device accessed at the beginning does not know that it is the CPRI of what speed on optical fiber, therefore, for RRU protocol conversion module, its one of them function just goes to identify that speed on this circuit is to determine T value, and the method adopted can be carry out poll by constantly changing T value, sees that T equals how many times and can detect that correct data realize data syn-chronization.After determining T value, this RRU protocol conversion module just can extract the information such as I/Q data, control word from the packet received (the CPRI superframe be made up of 256 basic frames), after extracting the information such as I/Q data, control word, N/M times of abstraction module these information is sent to process.

Because the sampling rate of I/Q data is different according to different system, such as, the descending IQ speed supposing certain RRU device system is here 1.92M, and the microwave equipment of low rate can only transmit the I/Q data of 0.64M here, so just must carry out data pick-up 3 times to the I/Q data of 1.92M, i.e. N=3, M=1; After the extraction process of this N/M times abstraction module, the speed of the I/Q data of output is just 0.64M, can meet the requirement of the transmission rate of the microwave equipment of low rate, can be left intact to control word meanwhile.Subsequently, the data of the 0.64M after N/M doubly extracts process are sent into data volume compressed encoding module and are processed.

Due in the I/Q data that RRU device transmits, I is 15bit or more, Q is 15bit or more, therefore the needs (bandwidth calculation mode is: spreading rate * I*Q) that bit number could meet the bandwidth of microwave transmission must be reduced, take I as 15bit, Q is 15bit, spreading rate is 0.96 is example, then bandwidth is 0.96 (spreading rate) * 15 (I) * 15 (Q), suppose after data volume compressed encoding module, IQ number is processed into 10bit, the spreading rate of microwave equipment end is 0.64, then after this data volume compressed encoding module, I/Q data bandwidth is 0.64 (spreading rate) * 10 (I) * 10 (Q) }, situation is taken simultaneously according to control word, respective handling is carried out (such as to control word load, control word is 16bit, and whole CPRI frame 256 positions also have a lot of idle in fact, 16 control words have only been used in this system, so just can control word load on average to not transmitting with in control word, ensure also control word to be processed into 10bit, remaining 6bit can be placed in idle position and transmit).

Subsequently, this data volume compressed encoding module is merged into the basic frame format (but speed and bit wide change) of CPRI the I/Q data after compressed encoding process and control word, then these data is sent into microwave protocol conversion module and processes.

Microwave protocol conversion module, by the CPRI frame after the compression of reception, is mapped in the transmission load of oneself, and composition STM-N Frame, is then launched by microwave equipment.Schematic diagram CPRI frame being mapped to a kind of implementation in STM-N has been shown in Figure 11, and by this microwave protocol conversion module, CPRI frame can be mapped in the PAYLOAD of STM-N.To be described CPRI frame global mapping in this diagram, if adopt above-mentioned the second or the third, when first relevant information data is mapped, then CPRI control word can be mapped in RSOH, AU-PTR, MSOH or PAYLOAD of STM-N frame structure, and the IQ BLOCK data of CPRI are then mapped in the PAYLOAD of STM-N after coded treatment.

Thus the communication transmission process so far completed on down direction.

Processing procedure on uplink direction is the inverse process on above-mentioned down direction, is specially:

Microwave protocol conversion module is responsible for the CPRI frame after compression and is extracted from the payload of STM-N, then send into date restoring decoder module and carry out decoding decompression, according to the coded message extracted, recover the bit wide the same with before compressed encoding, if being that 14bit recovers before compressed encoding is also 14bit, if 15bit or higher recovering also are 15bit or higher, recover control word according to the placement situation of control word before simultaneously.Data after recovery send into N/M times of interpose module, the speed that N/M times of interpose module becomes to need interpolation of data according to extraction speed before or system requirements, such as, 1.92 3 times have been extracted before, suppose to require now in 0.64M, to be inserted into 0.96M (speed on up direction can not be identical with the speed on up direction), so just need interpolation 3/2 times (N=3, M=2).Then I/Q data and the control word feeding RRU protocol conversion module needing transmission, by RRU protocol conversion module, I/Q data and control word are first formed basic frame according to CPRI consensus standard, then basic frame composition superframe is sent to RRU end by optical fiber.When the quantity of superframe is more than 256, be then every 256 superframes form a radio frames by optical fiber be sent to RRU end.

Above-mentioned is for CPRI transmits with RRU transmission means, microwave transmission mode is STM-N transmission means is that example has been described in detail, if RRU transmission means adopts other agreements, and/or microwave transmission mode adopts other agreements, concrete transmission conversion regime is similar to the above, when mapping, due to the difference of the agreement of each transmission means, may be different, frame structure specifically with each host-host protocol is relevant, according to different needs, when arranging mapping mode, can according to the RRU transmission means of correspondence, the concrete agreement of microwave transmission mode does corresponding different set, do not repeat them here.

RRU microwave transmission conversion equipment according to the present invention as described hereinbefore, the present invention also provides a kind of RRU microwave transmission system, it comprises RRU device, microwave equipment and RRU microwave transmission conversion equipment, the specific implementation of RRU microwave transmission conversion equipment and identical in each embodiment of the invention described above, do not repeat them here.

Above-described embodiment of the present invention, is only the explanation to better embodiment of the present invention, does not form limiting the scope of the present invention.Any amendment done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within claims of the present invention.

Claims

1. a RRU microwave transmission conversion method, comprises step:

Receive the Frame of up microwave protocol format, the second relevant information data of RRU agreement is extracted from the Frame of this up microwave protocol format, and sending to described RRU after this second relevant information data being formed the packet of up RRU protocol format, the described second relevant information packet draws together control word, I/Q data;

Or

2. RRU microwave transmission conversion method according to claim 1, is characterized in that:

Described descending RRU protocol format, up RRU protocol format are IR protocol format, OBSAI protocol format or CPRI protocol format;

And/or

Described descending microwave protocol format, up microwave protocol format are STM-N protocol format, when the first relevant information data being mapped to the Frame of descending microwave protocol format, control word is mapped in RSOH, AU-PTR, MSOH or PAYLOAD of STM-N frame structure, and I/Q data is mapped in the PAYLOAD of STM-N.

3. a RRU microwave transmission conversion method, comprises step:

Or

4. RRU microwave transmission conversion method according to claim 3, is characterized in that:

And/or

Described descending microwave protocol format, up microwave protocol format are STM-N protocol format, by the basic frame format data-mapping of this descending RRU agreement to the Frame of descending microwave protocol format time, by the basic frame format data-mapping of this descending RRU agreement in the PAYLOAD of STM-N frame structure.

5. a RRU microwave transmission conversion equipment, comprising: the RRU protocol conversion module be connected with RRU device, the microwave protocol conversion module be connected with microwave equipment:

And/or

6. a RRU microwave transmission conversion equipment, comprising: the RRU protocol conversion module be connected with RRU device, the microwave protocol conversion module be connected with microwave equipment:

And/or

7. a RRU microwave transmission system, comprising: RRU device, microwave equipment and the RRU microwave transmission conversion equipment as described in claim 5 or 6.