CN104868982B - Base band Main Processor Unit, digital front-end, Base Band Unit and data transmission method - Google Patents
Base band Main Processor Unit, digital front-end, Base Band Unit and data transmission method Download PDFInfo
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Abstract
The present invention provides a kind of base band Main Processor Unit, digital front-end, Base Band Unit and data transmission method, the base band Main Processor Unit includes: the first generation module, for obtaining the significant bit data of downlink common control channel according to downlink common control channel data；Second generation module, for generating the resource impact information of the significant bit data；Sending module, for the significant bit data of downlink common control channel and resource impact information to be sent to digital front-end, so that digital front-end handles the significant bit data of downlink common control channel, obtaining that treated, downlink common control channel Data Concurrent is sent.In technical solution provided by the invention, the processing of downlink common control channel data is completed by base band Main Processor Unit and digital front-end, be conducive to base band Cheng Chihou data interaction, preferably support Collaborative processing and carrier wave dynamic migration, digital front-end can be put into remote radio unit (RRU), reduce front-haul transmission bandwidth.
Description
Technical field
The present invention relates to the communications field more particularly to a kind of base band Main Processor Unit, digital front-end, Base Band Unit and data
Transmission method.
Background technique
3GPP long term evolution uses OFDM(Orthogonal Frequency Division Multiplexing, orthogonal
Frequency multiplexing technique) and MIMO(Multiple-Input Multiple-Output, Multiple Input Multiple Output) it is used as its wireless network
The sole criterion of network evolution.The peak value speed of downlink 100Mbit/s and uplink 50Mbit/s is capable of providing under 20MHz spectral bandwidth
Rate.The performance for improving Cell Edge User improves cell energies and reduces system delay.Wherein, distributed base station will
The BBU(baseband unit of base station, baseband portion) and RRU/RRH(radio remote unit/head, radio frequency part) point
From.BBU is generally positioned in computer room, is connected by optical fiber with the RRU for being located at antenna proximal end.CPRI is used before BBU and RRU
(common public radio interface, common public radio interface) agreement is communicated.This distributed frame tool
Have the advantages that configuration is flexible, engineering construction is convenient, environmental suitability is strong, has been widely used in the construction of 3G wireless network.
In the prior art, the system architecture of distributed base station is as shown in Figure 1, include physical layer and height in Base Band Unit BBU
Layer, all physical layer process are completed to complete within the physical layer in the processing unit of the same Base Band Unit BBU, be located
Data after the completion of reason will be sent to radio frequency remote unit RRU, after being performed corresponding processing by radio frequency remote unit RRU, send
To antenna, therefore, the PDCCH(Physical Downlink Control Channel of LTE), PCFICH(Physical Control Format Indicator Channel) and PHICH
The processing of (Physical HARQ Indicator Channel) is completed in the processing unit of the same Base Band Unit BBU.
The downlink processing of each cell of the implementation of above-mentioned existing product is a closed process, it is difficult to meet cell
Between collaborative process demand.It is point-to-point mapping relations before BBU and RRU, it is more difficult to realize and in existing product scheme
The flexible exchange of data between BBU and RRU.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of base band Main Processor Units, digital front-end, Base Band Unit
And data transmission method, the processing of downlink common control channel data is respectively by base band Main Processor Unit and digital front-end Lai complete
At, be on the one hand conducive to base band Cheng Chihou data interaction, thus preferably support Collaborative processing and carrier wave dynamic migration；Separately
On the one hand digital front-end can also be put into remote radio unit (RRU), reduces front-haul transmission bandwidth.
To achieve the goals above, the present invention provides a kind of base band Main Processor Units, comprising: the first generation module is used
According to downlink common control channel data, the significant bit data of downlink common control channel are generated；Second generation module is used
In the resource impact information for the significant bit data for generating the downlink common control channel；Sending module, under will be described
The significant bit data and resource impact information of row common control channel are sent to digital front-end, so that the digital front-end root
It handles, is obtained under treated according to significant bit data of the resource impact information to the downlink common control channel
Row public control channel data is simultaneously sent.
Preferably, the downlink common control channel data include physical mixed automatic re-transmission indicating channel PHICH data；
First generation module includes: the first processing submodule, for handling PHICH data, obtains the symbol sequence of PHICH
Column；Transform subblock is converted for the symbol sebolic addressing to the PHICH, and PHICH bit data, described after being converted
The data volume of symbol sebolic addressing of the data volume of PHICH bit data after conversion less than the PHICH；Submodule is generated, is used for
The significant bit data of down control channel are generated according to the PHICH bit data after the conversion.
It preferably, further include physical downlink control channel PDCCH data and physics control in the down control channel data
Format indication channel PCFICH data processed；First generation module, further includes: second processing submodule, for described
PDCCH data and PCFICH data are handled, and PDCCH bit data and PCFICH bit data are obtained；The generation submodule
Block is further used under being generated according to PHICH bit data, PDCCH bit data and the PCFICH bit data after the conversion
The significant bit data of row control channel.
Preferably, the sending module is also used to send power control information to the digital front-end, so that the number
Word front end carries out power control according to the power control information, to downlink common control channel.
The present invention also provides a kind of digital front-ends, comprising: receiving module, for receiving the transmission of base band Main Processor Unit
The significant bit data and resource impact information of downlink common control channel；Processing module, for being believed according to the resource impact
Breath handles the significant bit data of the downlink common control channel, the downlink common control channel number that obtains that treated
According to；Sending module, for sending treated the downlink common control channel data.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
Position be 2 bit when, the processing module includes: the first modulation submodule, for according to resource impact information to the PHICH's
The significant bit data of significant bit data, the significant bit data of PDCCH and PCFICH carry out quadrature phase shift keying QPSK tune
System, obtains the QPSK modulation symbol of the QPSK modulation symbol of PHICH, the QPSK modulation symbol of PDCCH and PCFICH；Third processing
Submodule modulates symbol for the QPSK modulation symbol of QPSK modulation symbol, PDCCH to the PHICH and the QPSK of PCFICH
It number is handled, the downlink common control channel data that obtain that treated.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
When position is greater than 2 bit, the processing module includes: the second modulation submodule, is used for according to the resource impact information to described
The significant bit data of PDCCH and the significant bit data of PCFICH carry out QPSK modulation, obtain the QPSK modulation symbol of PDCCH
And the QPSK modulation symbol of PCFICH；Inverse conversion submodule, for according to the resource impact information to the effective of the PHICH
Bit data carries out inverse conversion, generates the symbol sebolic addressing of PHICH；Fourth process submodule, for PHICH symbol sebolic addressing,
The QPSK modulation symbol of PDCCH and the QPSK modulation symbol of PCFICH are handled, the downlink common control channel that obtains that treated
Track data.
Preferably, the digital front-end further include: power control module, the function for being sent according to base band Main Processor Unit
Rate control information carries out power control to downlink common control channel.
Preferably, the digital front-end is set to Base Band Unit or Remote Radio Unit.
The present invention also provides before a kind of Base Band Unit, including base band Main Processor Unit as described above and number as described above
End.
The present invention also provides a kind of data transmission methods, are used for base band Main Processor Unit, which comprises under
Row public control channel data generates the significant bit data of downlink common control channel；Generate the downlink common control channel
The resource impact information of the significant bit data in road；By the significant bit data and resource impact of the downlink common control channel
Information is sent to digital front-end, so that the digital front-end is according to the resource impact information to the downlink common control channel
The significant bit data in road are handled, and obtaining that treated, downlink common control channel Data Concurrent is sent.
Preferably, the downlink common control channel data include PHICH data；The generation downlink common control channel
Significant bit data include: that PHICH data are handled, obtain the symbol sebolic addressing of PHICH；To the symbol of the PHICH
Sequence is converted, PHICH bit data after being converted, and the data volume of the PHICH bit data after the conversion is less than institute
State the data volume of the symbol sebolic addressing of PHICH；Having for downlink common control channel is generated according to PHICH bit data after the conversion
Imitate bit data.
It preferably, further include physical downlink control channel PDCCH data and object in the downlink common control channel data
It manages control format and indicates channel PCFICH data；The significant bit data for generating downlink common control channel further include: right
The PDCCH data and PCFICH data are handled, and PDCCH bit data and PCFICH bit data are obtained；The basis
PHICH bit data generates the significant bit data of downlink common control channel after the conversion, specifically: according to the conversion
PHICH bit data, PDCCH bit data and PCFICH bit data afterwards generates the significant bit of downlink common control channel
Data.
The present invention also provides a kind of data transmission methods, are used for digital front-end, which comprises receive the main place of base band
Manage the significant bit data and resource impact information of the downlink common control channel that unit is sent；According to the resource impact information
The significant bit data of the downlink common control channel are handled, the downlink common control channel number that obtains that treated
According to；Downlink common control channel data that treated described in sending.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
It is described to be carried out according to significant bit data of the resource impact information to the downlink common control channel when position is 2 bit
Processing include: according to resource impact information to the significant bit data of the PHICH, the significant bit data of PDCCH and
The significant bit data of PCFICH carry out quadrature phase shift keying QPSK modulation, obtain the QPSK modulation symbol of PHICH, PDCCH
The QPSK modulation symbol of QPSK modulation symbol and PCFICH；QPSK modulation to the QPSK modulation symbol, PDCCH of the PHICH
The QPSK modulation symbol of symbol and PCFICH are handled, the downlink common control channel data that obtain that treated.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
When position is greater than 2 bit, it is described according to the resource impact information to the significant bit data of the downlink common control channel into
Row processing includes: according to the resource impact information to the significant bit data of the PDCCH and the effective number of bits of PCFICH
According to QPSK modulation is carried out, the QPSK modulation symbol of PDCCH and the QPSK modulation symbol of PCFICH are obtained；According to the resource impact
Information carries out inverse conversion to the significant bit data of the PHICH, generates the symbol sebolic addressing of PHICH；To the symbol sequence of PHICH
Column, the QPSK modulation symbol of PDCCH and PCFICH QPSK modulation symbol handled, the public control of downlink that obtains that treated
Channel data.
The advantageous effects of the above technical solutions of the present invention are as follows:
Technical solution provided by the invention, by by the processing of downlink common control channel data respectively in base band main process task
Unit is carried out with digital front-end, so that the treatment process of downlink common control channel data is simple and effective, is on the one hand conducive to
Base band Cheng Chihou data interaction, to preferably support Collaborative processing and carrier wave dynamic migration；It on the other hand can also be by number
Word front end is put into remote radio unit (RRU), reduces front-haul transmission bandwidth.
Detailed description of the invention
Fig. 1 is the system architecture of distributed base station.
Fig. 2 is the structural schematic diagram for the base band Main Processor Unit that the embodiment of the present invention 1 provides.
Fig. 3 is the modulation constellation of downlink common control channel data.
Fig. 4 is the flow chart that base band Main Processor Unit handles PHICH data.
Fig. 5 is the digital front-end structural schematic diagram that the embodiment of the present invention 1 provides.
Fig. 6 is the structural schematic diagram for the Base Band Unit that the embodiment of the present invention 1 provides.
Fig. 7 is the flow chart for the data processing method for base band Main Processor Unit that the embodiment of the present invention 1 provides.
Fig. 8 is the data processing method flow chart for digital front-end that the embodiment of the present invention 1 provides.
Fig. 9 is the processing method for the downlink common control channel data for Base Band Unit that the embodiment of the present invention 2 provides
Flow chart.
Figure 10 is the data transmission format schematic diagram of the common control channel in the present invention.
Specific embodiment
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
For carrying out in the prior art, between Base Band Unit and Remote Radio Unit, data exchange is inconvenient to ask the present invention
Topic provides a kind of base band Main Processor Unit, digital front-end, Base Band Unit and data transmission method, by by the public control of downlink
The processing of channel data processed is carried out in base band Main Processor Unit with digital front-end respectively, so that downlink common control channel data
Treatment process it is simple and effective, be on the one hand conducive to base band Cheng Chihou data interaction, thus preferably support Collaborative processing with
And carrier wave dynamic migration；On the other hand digital front-end can also be put into remote radio unit (RRU), reduces front-haul transmission belt
It is wide.
Fig. 2 is the structural schematic diagram for the base band Main Processor Unit that the embodiment of the present invention 1 provides, as shown, the base band
Main Processor Unit 20, comprising:
First generation module 21, for according to downlink common control channel data, generate downlink common control channel to have
Imitate bit data；
Second generation module 22, the resource impact letter of the significant bit data for generating the downlink common control channel
Breath；
Sending module 23, for sending the significant bit data of the downlink common control channel and resource impact information
To digital front-end, so that the digital front-end is according to the resource impact information to the effective of the downlink common control channel
Bit data is handled, and obtaining that treated, downlink common control channel Data Concurrent is sent.
In the above-mentioned technical solutions, it is public to generate downlink according to downlink common control channel data for the first generation module 21
The significant bit data of control channel, the second generation module 22 generate the significant bit data of the downlink common control channel
The significant bit data of the downlink common control channel and resource impact information are sent to by resource impact information, sending module 23
Digital front-end is handled, and the downlink common control channel data that obtain that treated are to send.Base band Main Processor Unit is only under
Row public control channel data has carried out part treatment process, to obtain significant bit data and the life of downlink common control channel
At corresponding resource impact information, treatment process is simple.
It can in the significant bit data of downlink common control channel acquired in the first generation module of base band Main Processor Unit
To include the significant bit data of the significant bit data of PDCCH, the significant bit data of PHICH and PCFICH, can also wrap
Some parameter signal data and some other data are included, for other data without handling it.Due to PDCCH and
PCFICH can be modulated using QPSK, and PHICH can obtained after BPSK modulation and spread processing by conversion
The constellation point of QPSK modulation, therefore, digital front-end, can be right in the significant bit data for receiving the downlink common control channel
It is handled.But as shown in figure 3, the constellation point of PHICH and the constellation point of QPSK modulation have 45 ° of offset, therefore before number
End needs to know type and the position of the significant bit data of received effective downlink common control channel.Sending module
It will include that the position of significant bit data and the resource impact information of type of effective downlink common control channel is sent to
Digital front-end, digital front-end can be more easily to the significant bits of downlink common control channel according to the resource impact information
Data are handled.
Base band Main Processor Unit needs to send the significant bit data of downlink common control channel and resource impact information
To digital front-end, so that digital front-end completes subsequent treatment process, therefore, base band Main Processor Unit needs and digital front-end
It is communicated to transmit data, when downlink public control channel data includes physical mixed automatic re-transmission indicating channel PHICH number
According to when, include the effective number of bits of PHICH in the significant bit data for the downlink common control channel that the first generation module obtains
According to will cause that volume of transmitted data is big, caused to the performance of system since the bit that the significant bit data of PHICH occupy is big
It influences, therefore, it is necessary to the significant bit data to PHICH to handle, and reduce volume of transmitted data.
Therefore, when the downlink common control channel data include physical mixed automatic re-transmission indicating channel PHICH data；
First generation module may include: that the first processing submodule for handling PHICH data obtains the symbol of PHICH
Number sequence；Transform subblock is converted for the symbol sebolic addressing to the PHICH, PHICH bit data after being converted,
The data volume of PHICH bit data after the conversion is less than the symbol sebolic addressing of the PHICH；Submodule is generated, basis is used for
PHICH bit data generates the significant bit data of downlink common control channel after the conversion.
In the above-mentioned technical solutions, the first processing submodule handles PHICH data, obtains the symbol sequence of PHICH
Column, transform subblock are converted by the symbol sebolic addressing to PHICH, obtain PHICH bit data, the PHICH ratio after conversion
The data volume of symbol sebolic addressing of the data volume of special data less than PHICH generates submodule according to the PHICH bit data after conversion
The significant bit data of down control channel are generated, thus, so that base band Main Processor Unit is public to digital front-end transmission downlink
When the significant bit data of control channel, the data volume transmitted becomes smaller, and avoids transmitted data amount excessive the problem of causing.
Wherein, transform subblock is when the symbol sebolic addressing to PHICH is converted, can be big according to preset data volume
The symbol sebolic addressing of PHICH and the mapping relations of the small PHICH bit data of data volume, by the symbol sequence of the big PHICH of data volume
Column be converted to the small PHICH bit data of data volume, for example, when the value of the symbol sebolic addressing of PHICH only have 4 kinds it is possible when, can
With the symbol sebolic addressing for using 2 bits to indicate the different PHICH in 4.
Preferably, the first processing submodule can also include: channel encoding unit, for carrying out to PHICH data
Channel coding, the PHICH bit data after forming coding；Modulation unit, for being carried out to the PHICH bit data after coding
BPSK modulation, generates the modulation symbol of PHICH；Spectrum-spreading unit carries out spread processing for the modulation symbol to the PHICH,
Obtain the symbol sebolic addressing of PHICH.
In the above-mentioned technical solutions, PHICH carries the ACK/NACK of HARQ, and whether instruction eNodeB has correctly received
The transmission of PUSCH.Fig. 4 is the flow chart that base band Main Processor Unit handles PHICH data, as shown, to PHICH
When data are handled, repeated encoding is carried out to PHICH data by channel encoding unit first, the ACK/NACK of 1 bit passes through
3 identical bits are exported after repeated encoding；Then BPSK modulation is carried out to 3 bits by modulation unit, obtains 3 modulation
Symbol；Spread processing finally is carried out to it by spectrum-spreading unit, at conventional CP, Walsh spread code length is 4, is obtained after spread spectrum
12 modulation symbol sequences, after having obtained modulation symbol sequence, transform subblock is turned by the symbol sebolic addressing to PHICH
It changes, obtains PHICH bit data, the data of symbol sebolic addressing of the data volume less than PHICH of the PHICH bit data after conversion
Amount.
It preferably, further include physical downlink control channel PDCCH data and object in the downlink common control channel data
It manages control format and indicates channel PCFICH data；First generation module, can also include: second processing submodule, be used for
The PDCCH data and PCFICH data are handled, PDCCH bit data and PCFICH bit data are obtained；The life
It is further used at submodule raw according to PHICH bit data, PDCCH bit data and PCFICH bit data after the conversion
At the significant bit data of downlink common control channel.
In the above-mentioned technical solutions, downlink common control channel data further include PCFICH data and PDCCH data.
The CFI information that PCFICH carries 12 bit indicates the OFDM for control channel transmission in each subframe
(Orthogonal Frequency Division Multiplexing orthogonal frequency division multiplexi, one kind of multi-carrier modulation)
Symbolic number (in general, the symbolic number is 1,2,3).PCFICH becomes information bit i.e. PCFICH ratio after the block coding of (32,2)
Special data.
PDCCH carrying control information, by CRC(Cyclical Redundancy Check, redundancy check) processing after,
PDCCH bit data is obtained by channel coding, channel coding generallys use tail-biting convolutional code, code rate 1/3.
Channel coding is carried out to PDCCH data and PCFICH data by second processing submodule, after being encoded
After PCFICH bit data after PDCCH bit data and coding, scrambling processing is carried out, the PDCCH bit number after being scrambled
According to and scrambling after PCFICH bit data, generate submodule be further used for according to PHICH bit data after the conversion plus
The PCFICH bit data after PDCCH bit data and scrambling after disturbing generates the significant bit data of downlink common control channel
Preferably, the sending module can be also used for sending power control information to the digital front-end, so that institute
Digital front-end is stated according to the power control information, power control is carried out to downlink common control channel.
In the above-mentioned technical solutions, sending module is by sending power control information to digital front-end, so that digital front-end
Power control can be carried out to downlink common control channel.
Wherein, power control information can be the power of each down channel and the relative value of general power, for example, if total work
Rate indicates that the power of PDCCH and the relative value of general power are 0.5, then the magnitude of power of PDCCH is expressed as 5 with numerical value 10.Root
According to power level representated by numerical value 10, it will be able to learn the power level of PDCCH.
Fig. 5 is the digital front-end structural schematic diagram that the embodiment of the present invention 1 provides.As shown, the digital front-end 50, packet
It includes:
Receiving module 51, the significant bit data of the downlink common control channel for receiving the transmission of base band Main Processor Unit
And resource impact information；
Processing module 52, for the effective number of bits according to the resource impact information to the downlink common control channel
According to being handled, the downlink common control channel data that obtain that treated；
Sending module 53, for sending treated the downlink common control channel data.
In the above-mentioned technical solutions, the downlink that digital front-end receives the transmission of base band Main Processor Unit by receiving module is public
The significant bit data and resource impact information of control channel altogether, the processing by processing module obtains that treated, and downlink is public
Control channel data carry out transmission transmission by sending module.Digital front-end is in the data for receiving the transmission of base band Main Processor Unit
Subsequent treatment process is completed later, the downlink common control channel data that obtain that treated.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
When position is 2 bit, the processing module may include: the first modulation submodule, be used for according to resource impact information to described
The significant bit data of the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH carry out quadrature phase shift keying
QPSK modulation, obtains the QPSK modulation symbol of the QPSK modulation symbol of PHICH, the QPSK modulation symbol of PDCCH and PCFICH；The
Three processing submodules, for QPSK modulation symbol, the QPSK modulation symbol of PDCCH and the QPSK of PCFICH to the PHICH
Modulation symbol is handled, the downlink common control channel data that obtain that treated.
In the above-mentioned technical solutions, the significant bit data of downlink common control channel include the effective number of bits of PHICH
According to, the significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of PHICH occupy
When position is 2 bits, since the number of bits that the significant bit data of PDCCH and the significant bit data of PCFICH occupy is also equal
For 2 bits, therefore, significant bit data, the significant bit data of PDCCH and the effective number of bits of PCFICH of the PHICH
According to can be modulated using QPSK modulation system to it, therefore, by the first modulation submodule according to resource impact information
QPSK modulation is carried out to the significant bit data of the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH,
After obtaining the QPSK modulation symbol of the QPSK modulation symbol of PHICH, the QPSK modulation symbol of PDCCH and PCFICH, by third
Reason submodule is handled, the downlink common control channel data that obtain that treated.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
When position is greater than 2 bit, the processing module includes: the second modulation submodule, is used for according to resource impact information to the PDCCH
Significant bit data and PCFICH significant bit data carry out QPSK modulation, obtain PDCCH QPSK modulation symbol and
The QPSK modulation symbol of PCFICH；Inverse conversion submodule, for the effective number of bits according to resource impact information to the PHICH
According to inverse conversion is carried out, the symbol sebolic addressing of PHICH is generated；Fourth process submodule, for symbol sebolic addressing, the PDCCH to PHICH
The QPSK modulation symbol of QPSK modulation symbol and PCFICH are handled, the downlink common control channel data that obtain that treated.
In the above-mentioned technical solutions, the significant bit data of downlink common control channel include the effective number of bits of PHICH
According to, the significant bit data of PDCCH and the significant bit data of PCFICH, the significant bit data of PDCCH and having for PCFICH
Imitating the number of bits that bit data occupies is 2 bits, therefore, can significant bit data to PDCCH and PCFICH
Significant bit data carry out QPSK modulation；It, can not when the bit that the significant bit data of PHICH occupy is greater than 2 bit
It is modulated using QPSK, therefore, it is necessary to carry out inverse conversion by significant bit data of the inverse conversion submodule to PHICH, is generated
The symbol sebolic addressing of PHICH, the second modulation submodule carry out the significant bit data of PDCCH and the significant bit data of PCFICH
QPSK modulation, QPSK tune of the fourth process submodule to the symbol sebolic addressing of PHICH, the QPSK modulation symbol of PDCCH and PCFICH
Symbol processed is handled, the downlink common control channel data that obtain that treated.
Preferably, the digital front-end can also include: power control module, for being sent according to base band Main Processor Unit
Power control information, to downlink common control channel carry out power control.
In the above-mentioned technical solutions, power can be carried out to the channel for needing to carry out power control by power control module
Control.
Preferably, the digital front-end is set to Base Band Unit or Remote Radio Unit.
Fig. 6 is the structural schematic diagram for the Base Band Unit that the embodiment of the present invention 1 provides.As described in Figure, Base Band Unit 60, including
Base band Main Processor Unit 61 and digital front-end 62.
Include: in base band Main Processor Unit 61
First downlink processing module, first in base band Main Processor Unit provided for realizing the embodiment of the present invention 1 are raw
At the function of module, part is carried out to downlink common control channel data and has been handled, the effective of downlink common control channel is obtained
Bit data；
Control information generating module: second in base band Main Processor Unit provided for realizing the embodiment of the present invention 1 is raw
At the function of module, resource impact information is generated；
Sending module, for passing the significant bit data of downlink common control channel and resource impact information by data
Defeated network is sent to digital front-end；
High level processing, for handling other high-rise operations in addition to physical layer.
Digital front-end 62 includes:
Receiving module, for receiving the data sent from base band Main Processor Unit 61 by data transmission network；
Second downlink processing module, for realizing the embodiment of the present invention 1 provide digital front-end processing module function,
Subsequent processing carried out to the significant bit data of downlink common control channel, the downlink common control channel that generates that treated
Data；
Sending module, for downlink common control channel data to be sent to RRU by treated.
In the above-described embodiments, digital front-end and base band Main Processor Unit are all placed in Base Band Unit, in fact, digital
Front end can also be placed in RRU.
Fig. 7 is the flow chart for the data processing method for base band Main Processor Unit that the embodiment of the present invention 1 provides.Such as figure
It is shown, which comprises
Step S700 obtains the significant bit data of downlink common control channel according to downlink common control channel data
And resource impact information；
The significant bit data of the downlink common control channel and resource impact information are sent to number by step S702
Front end, so that the digital front-end is according to the resource impact information to the effective number of bits of the downlink common control channel
According to being handled, obtaining that treated, downlink common control channel Data Concurrent is sent.
Preferably, the downlink common control channel data include PHICH data；The generation downlink common control channel
Significant bit data include: that PHICH data are handled, obtain the symbol sebolic addressing of PHICH；To the symbol of the PHICH
Sequence is converted, PHICH bit data after being converted, and the data volume of the PHICH bit data after the conversion is less than institute
State the data volume of the symbol sebolic addressing of PHICH；Having for downlink common control channel is generated according to PHICH bit data after the conversion
Imitate bit data.
Preferably, PHICH data are handled, obtains the symbol sebolic addressing of PHICH, it can be with specifically: to PHICH data
Channel coding is carried out, the PHICH data bit data after forming coding；BPSK tune is carried out to the PHICH bit data after coding
System, generates the modulation symbol of PHICH；Spread processing is carried out to the modulation symbol of the PHICH, obtains the symbol sebolic addressing of PHICH.
It preferably, further include physical downlink control channel PDCCH data and object in the downlink common control channel data
It manages control format and indicates channel PCFICH data；The significant bit data for generating downlink common control channel further include: right
The PDCCH data and PCFICH data are handled, and PDCCH bit data and PCFICH bit data are obtained；The basis
PHICH bit data generates the significant bit data of downlink common control channel after the conversion, specifically: according to the conversion
PHICH bit data, PDCCH bit data and PCFICH bit data afterwards generates the significant bit of downlink common control channel
Data.
Fig. 8 is the data processing method flow chart for digital front-end that the embodiment of the present invention 1 provides.As shown, institute
The method of stating includes:
Step S800 receives the significant bit data and resource of the downlink common control channel that base band Main Processor Unit is sent
Map information；
Step S802 is carried out according to significant bit data of the resource impact information to the downlink common control channel
Processing, the downlink common control channel data that obtain that treated；
Step S806 sends treated the downlink common control channel data.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
It is described to be carried out according to significant bit data of the resource impact information to the downlink common control channel when position is 2 bit
Processing include: according to resource impact information to the significant bit data of the PHICH, the significant bit data of PDCCH and
The significant bit data of PCFICH carry out quadrature phase shift keying QPSK modulation, obtain the QPSK modulation symbol of PHICH, PDCCH
The QPSK modulation symbol of QPSK modulation symbol and PCFICH；QPSK modulation to the QPSK modulation symbol, PDCCH of the PHICH
The QPSK modulation symbol of symbol and PCFICH are handled, the downlink common control channel data that obtain that treated.
Preferably, the significant bit data of the downlink common control channel include PHICH significant bit data,
The significant bit data of PDCCH and the significant bit data of PCFICH, when the bit that the significant bit data of the PHICH occupy
When position is greater than 2 bit, it is described according to the resource impact information to the significant bit data of the downlink common control channel into
Row processing includes: according to the resource impact information to the significant bit data of the PDCCH and the effective number of bits of PCFICH
According to QPSK modulation is carried out, the QPSK modulation symbol of PDCCH and the QPSK modulation symbol of PCFICH are obtained；According to the resource impact
Information carries out inverse conversion to the significant bit data of the PHICH, generates the symbol sebolic addressing of PHICH；To the symbol sequence of PHICH
Column, the QPSK modulation symbol of PDCCH and PCFICH QPSK modulation symbol handled, the public control of downlink that obtains that treated
Channel data.
Fig. 9 is the processing method for the downlink common control channel data for Base Band Unit that the embodiment of the present invention 2 provides
Flow chart.As shown, the method, comprising:
Step S900 carries out channel coding to downlink common control channel data, and downlink common control channel data include
PDCCH data, PHICH data and PCFICH data；
Step S902 carries out scrambling processing to by channel coding treated PDCCH data and PCFICH data, obtains
PDCCH bit data and PCFICH bit data, enter step S910；
Step S904 carries out BPSK modulation to by channel coding treated PHICH data, obtains PHICH symbol sequence
Column；
Step S906 spreads PHICH symbol sebolic addressing, the PHICH symbol sebolic addressing after being spread；
Step S908 converts the PHICH symbol sebolic addressing after spread spectrum, obtains PHICH bit data.
Step S910, generate the significant bit data of PDCCH, the significant bit data of PHICH, PCFICH significant bit
Data and resource impact information.
Step S912, according to resource impact information to the significant bit data of PDCCH, the significant bit data of PHICH and
The significant bit data of PCFICH carry out QPSK modulation, obtain modulated downlink common control channel data；In this step,
Each bit data has obtained QPSK modulation symbol sequence through ovennodulation, i.e., modulated downlink common control channel data, with
For the significant bit data of PCFICH, it after QPSK is modulated, is being modulated into 16 symbols.
Step S914 carries out layer mapping and precoding to modulated downlink common control channel data；
Step S916 carries out resource impact to the downlink common control channel data by layer mapping and precoding；Herein
In step, the downlink common control channel data after layer mapping and precoding carry out resource impact, are mapped on RE, with
PCFICH data instance carries out resource impact, is mapped by modulated 16 symbols of QPSK after layer mapping and precoding
Onto 4 REG(RE Group).
Step S918 carries out IFFT(Inverse Fast to the downlink common control channel data Jing Guo resource impact
Fourier Transformation, inverse fast Fourier transform) processing；The modulation of step realization OFDM symbol.
Step S920 carries out Add CP(Cyclic to by IFFT treated downlink common control channel data
Prefix, cyclic prefix) processing, obtain CPRI data；The step is actually to prevent an auxiliary load to guarantee quadrature
Wave is mutually obscured with another carrier wave.
CPRI data are sent to RRU by step S922.
Figure 10 is the data transmission format schematic diagram of the common control channel in the present invention.As shown, the transformat
In contain PDCCH, PCFICH and PHICH data and relevant control information.
Wherein, illustrating each field length can be depending on implementing situation, and each field present position is without first
Positional relationship afterwards.The meaning of each field is as follows:
Frame number: radio frame number belonging to the data that instruction is this time transmitted；
Subframe numbers: radio sub-frame number belonging to the data that instruction is this time transmitted；
Type instruction: indicate that current transformat is PDCCH, PCFICH and PHICH data and relevant control information
Transformat；
The OFDM symbol number M of control channel transmission: the OFDM symbol number of control channel transmission, M are logical in instruction current subframe
Normal value is 1,2,3；
The power ratio of PDCCH and RS: the power of instruction PDCCH channel accounts for the ratio of general power；
The power ratio of PCFICH and RS: the power of instruction PCFICH channel accounts for the ratio of general power；
The power ratio of PHICH and RS: the power of instruction PHICH channel accounts for the ratio of general power；
The data of PDCCH/PCFICH/PHICH in the OFDM symbol 0 of control channel transmission: some control channel is indicated
Bit data before PDCCH, PCFICH or PHICH modulation of 0th OFDM symbol of transmission, digital front-end are receiving the number
According to when carrying out OFDM modulation to it, which is mapped in the 0th OFDM symbol, and usually, which most greatly enhances
Degree is 1200, i.e., from RE0000 to RE1199；
The map information of PDCCH/PCFICH/PHICH in the OFDM symbol 0 of control channel transmission: some control is indicated
The resource mapping indication information of 0th OFDM symbol of transmission, in the OFDM symbol 0 for indicating the transmission of corresponding control channel
The data of PDCCH/PCFICH/PHICH be the data for being used for transmission the data of PDCCH, or being used for transmission PCFICH, or
The data of PHICH are used for transmission, usually, the maximum length of the data is 1200, i.e., from Hint0000 to Hint1199, point
The data of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of control channel transmission have not been corresponded to；
As described above, if the map information of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of control channel transmission
It is to be indicated with two bits, then may be defined that
00: indicating the data invalid of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of corresponding control channel transmission；
01: indicating that the data of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of corresponding control channel transmission are effective
And carry PDCCH data；
10: indicating that the data of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of corresponding control channel transmission are effective
And carry PHICH data；
11: indicating the data of the PDCCH/PCFICH/PHICH in the OFDM symbol 0 of corresponding transmission processed effectively simultaneously
Carry PCFICH data；
The data of PDCCH/PCFICH/PHICH on the OFDM symbol M-1 of control channel transmission: some control letter is indicated
Bit data before PDCCH, PCFICH or PHICH modulation of the M-1 OFDM symbol of road transmission；
The map information of PDCCH/PCFICH/PHICH on the OFDM symbol M-1 of control channel transmission: some control is indicated
The resource mapping indication information of the M-1 OFDM symbol of transmission processed.
Therefore, can according to resource mapping indication information can to PDCCH, PCFICH and PHICH data received into
The processing such as row modulation, layer mapping, precoding and resource impact.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (16)
1. a kind of base band Main Processor Unit characterized by comprising
First generation module, for generating the significant bit of downlink common control channel according to downlink common control channel data
Data, the downlink common control channel data include physical mixed automatic re-transmission indicating channel PHICH data, physical down control
Channel PDCCH data processed and Physical Control Format Indicator Channel PCFICH data；
Second generation module, the resource impact information of the significant bit data for generating the downlink common control channel；
Sending module, for the significant bit data of the downlink common control channel and resource impact information to be sent to number
Front end, so that the digital front-end is according to the resource impact information to the effective number of bits of the downlink common control channel
According to being handled, obtaining that treated, downlink common control channel Data Concurrent is sent, wherein PDCCH and PCFICH uses QPSK
Modulation, and PHICH can obtain the constellation point that QPSK is modulated by conversion after BPSK modulation and spread processing, by number
Front end is handled it in the significant bit data for receiving the downlink common control channel, and digital front-end needs to know institute
The type of the significant bit data of the effective downlink common control channel received and position.
2. base band Main Processor Unit as described in claim 1, which is characterized in that first generation module includes:
First processing submodule obtains the symbol sebolic addressing of PHICH for handling PHICH data；
Transform subblock is converted for the symbol sebolic addressing to the PHICH, and PHICH bit data, described after being converted
The data volume of symbol sebolic addressing of the data volume of PHICH bit data after conversion less than the PHICH；
Submodule is generated, for generating the effective number of bits of down control channel according to the PHICH bit data after the conversion
According to.
3. base band Main Processor Unit as claimed in claim 2, which is characterized in that first generation module, further includes:
Second processing submodule obtains PDCCH bit data for handling the PDCCH data and PCFICH data
And PCFICH bit data；
It is described generate submodule be further used for according to after the conversion PHICH bit data, PDCCH bit data and
The significant bit data of PCFICH bit data generation downlink common control channel.
4. base band Main Processor Unit as described in claim 1, which is characterized in that the sending module is also used to before the number
End sends power control information, so that the digital front-end is according to the power control information, to downlink common control channel
Carry out power control.
5. a kind of digital front-end characterized by comprising
Receiving module, the significant bit data and resource of the downlink common control channel for receiving the transmission of base band Main Processor Unit
Map information；
Processing module, for being carried out according to significant bit data of the resource impact information to the downlink common control channel
Processing, the downlink common control channel data that obtain that treated, the downlink common control channel data include physical mixed from
Dynamic retransmission indicating chanel PHICH data, physical downlink control channel PDCCH data and Physical Control Format Indicator Channel PCFICH
Data；
Sending module, for sending treated the downlink common control channel data；
Wherein, PDCCH and PCFICH is modulated using QPSK, and PHICH is passing through conversion after BPSK modulation and spread processing
The constellation point that can obtain QPSK modulation, by digital front-end in the significant bit data for receiving the downlink common control channel,
It is handled, digital front-end needs to know the significant bit data of received effective downlink common control channel
Type and position.
6. digital front-end as claimed in claim 5, which is characterized in that the significant bit data packet of the downlink common control channel
The significant bit data for including the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH, when the PHICH's
When the bit that significant bit data occupy is 2 bit, the processing module includes:
First modulation submodule, for according to resource impact information to the significant bit data of the PHICH, PDCCH it is effective
The significant bit data of bit data and PCFICH carry out quadrature phase shift keying QPSK modulation, obtain the QPSK modulation symbol of PHICH
Number, the QPSK modulation symbol of the QPSK modulation symbol of PDCCH and PCFICH；
Third handles submodule, QPSK modulation symbol and PCFICH for QPSK modulation symbol, PDCCH to the PHICH
QPSK modulation symbol handled, the downlink common control channel data that obtain that treated.
7. digital front-end as claimed in claim 5, which is characterized in that the significant bit data packet of the downlink common control channel
The significant bit data for including the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH, when the PHICH's
When the bit that significant bit data occupy is greater than 2 bit, the processing module includes:
Second modulation submodule, for the significant bit data and PCFICH according to the resource impact information to the PDCCH
Significant bit data carry out QPSK modulation, obtain the QPSK modulation symbol of PDCCH and the QPSK modulation symbol of PCFICH；
Inverse conversion submodule, for carrying out inverse conversion according to significant bit data of the resource impact information to the PHICH,
Generate the symbol sebolic addressing of PHICH；
Fourth process submodule, for the QPSK modulation symbol of symbol sebolic addressing, PDCCH to PHICH and the QPSK tune of PCFICH
Symbol processed is handled, the downlink common control channel data that obtain that treated.
8. digital front-end as claimed in claim 5, which is characterized in that further include:
Power control module, the power control information for being sent according to base band Main Processor Unit, to downlink common control channel
Carry out power control.
9. digital front-end as claimed in claim 5, which is characterized in that the digital front-end is set to Base Band Unit or remote radio
In unit.
10. a kind of Base Band Unit, including base band Main Processor Unit and such as claim 5-8 as described in claim any one of 1-4
Any one digital front-end.
11. a kind of data transmission method, which is characterized in that it is used for base band Main Processor Unit, this method comprises:
According to downlink common control channel data, the significant bit data of downlink common control channel are generated；
Generate the resource impact information of the significant bit data of the downlink common control channel；
The significant bit data of the downlink common control channel and resource impact information are sent to digital front-end, so that institute
It states digital front-end to be handled according to significant bit data of the resource impact information to the downlink common control channel, obtain
To treated, downlink common control channel Data Concurrent is sent, wherein the downlink common control channel data include that physics is mixed
Close automatic re-transmission indicating channel PHICH data, physical downlink control channel PDCCH data and Physical Control Format Indicator Channel
PCFICH data, PDCCH and PCFICH using QPSK modulate, and PHICH by BPSK modulation and spread processing after by turn
Transducing accesses the constellation point of QPSK modulation, by digital front-end in the effective number of bits for receiving the downlink common control channel
According to handling it, digital front-end needs to know the effective number of bits of received effective downlink common control channel
According to type and position.
12. method as claimed in claim 11, which is characterized in that the significant bit data for generating downlink common control channel
Include:
PHICH data are handled, the symbol sebolic addressing of PHICH is obtained；
The symbol sebolic addressing of the PHICH is converted, PHICH bit data after being converted, the PHICH ratio after the conversion
The data volume of symbol sebolic addressing of the data volume of special data less than the PHICH；
The significant bit data of downlink common control channel are generated according to PHICH bit data after the conversion.
13. method as claimed in claim 12, which is characterized in that the significant bit data for generating downlink common control channel
Further include:
The PDCCH data and PCFICH data are handled, PDCCH bit data and PCFICH bit data are obtained；
The significant bit data that downlink common control channel is generated according to PHICH bit data after the conversion, specifically:
The public control of downlink is generated according to PHICH bit data, PDCCH bit data and the PCFICH bit data after the conversion
The significant bit data of channel processed.
14. a kind of data transmission method, which is characterized in that be used for digital front-end, which comprises
Receive the significant bit data and resource impact information of the downlink common control channel that base band Main Processor Unit is sent；
It is handled, is handled according to significant bit data of the resource impact information to the downlink common control channel
Downlink common control channel data afterwards, the downlink common control channel data include physical mixed automatic re-transmission indicating channel
PHICH data, physical downlink control channel PDCCH data and Physical Control Format Indicator Channel PCFICH data；
Downlink common control channel data that treated described in sending；Wherein, PDCCH and PCFICH is modulated using QPSK, and
PHICH is existed in the constellation point that can obtain QPSK modulation by conversion after BPSK modulation and spread processing by digital front-end
The significant bit data for receiving the downlink common control channel, handle it, and digital front-end needs are known received
Effective downlink common control channel significant bit data type and position.
15. method as claimed in claim 14, which is characterized in that the significant bit data of the downlink common control channel include
The significant bit data of the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH, when having for the PHICH
Imitate bit data occupy bit be 2 bit when, it is described according to the resource impact information to the downlink common control channel
The significant bit data in road carry out processing
According to resource impact information to the significant bit data, the significant bit data of PDCCH and having for PCFICH of the PHICH
It imitates bit data and carries out quadrature phase shift keying QPSK modulation, obtain the QPSK modulation symbol of PHICH, the QPSK modulation symbol of PDCCH
Number and PCFICH QPSK modulation symbol；
At the QPSK modulation symbol of the QPSK modulation symbol of the PHICH, the QPSK modulation symbol of PDCCH and PCFICH
Reason, the downlink common control channel data that obtain that treated.
16. method as claimed in claim 14, which is characterized in that the significant bit data of the downlink common control channel include
The significant bit data of the significant bit data of PHICH, the significant bit data of PDCCH and PCFICH, when having for the PHICH
Imitate bit data occupy bit be greater than 2 bit when, it is described according to the resource impact information to the public control of the downlink
The significant bit data of channel carry out processing
The significant bit data of the PDCCH and the significant bit data of PCFICH are carried out according to the resource impact information
QPSK modulation, obtains the QPSK modulation symbol of PDCCH and the QPSK modulation symbol of PCFICH；
Inverse conversion is carried out according to significant bit data of the resource impact information to the PHICH, generates the symbol sequence of PHICH
Column；
The QPSK modulation symbol of the symbol sebolic addressing of PHICH, the QPSK modulation symbol of PDCCH and PCFICH is handled, is obtained
Downlink common control channel data that treated.
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| CN105959980B (en) * | 2016-04-27 | 2019-08-13 | 电子科技大学 | A kind of wireless access system based on C-RAN |
| CN110830186B (en) * | 2018-08-07 | 2022-05-31 | 黎光洁 | Uplink common control channel transmission method and device for wireless communication |
| CN113055067B (en) * | 2019-12-27 | 2024-04-26 | 中兴通讯股份有限公司 | Downlink signal processing method, device and base station |
| EP4272389A1 (en) * | 2020-12-31 | 2023-11-08 | Telefonaktiebolaget LM Ericsson (publ) | Method and device for power indication information transmission |
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