CN108599892A - a kind of data transmission method and device - Google Patents
a kind of data transmission method and device Download PDFInfo
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- CN108599892A CN108599892A CN201711482403.4A CN201711482403A CN108599892A CN 108599892 A CN108599892 A CN 108599892A CN 201711482403 A CN201711482403 A CN 201711482403A CN 108599892 A CN108599892 A CN 108599892A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0015—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
- H04L1/0008—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length by supplementing frame payload, e.g. with padding bits
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Abstract
A kind of data transmission method of present invention proposition and device.A kind of data transmission method, is applied to common public radio interface, and the common public radio interface includes manufacturer's self-defining data channel of free time；This method includes：Receive narrow band data；According to preset data mapping ruler, the narrow band data is mapped in manufacturer's self-defining data channel of the common public radio interface, the narrow band data is made to be transmitted in manufacturer's self-defining data channel.Using above-mentioned technical proposal, it can realize and narrow band data is transmitted by existing CPRI interfaces.
Description
Technical field
The present invention relates to wireless communication technology field more particularly to a kind of data transmission methods and device.
Background technology
With the fast development of mobile communication technology, the network architecture of wireless communication is just from traditional integrated base station framework
It is evolved to the distributed base station system that main feature is separated into base band and radio frequency, distributed base station system has become public network base
It stands the Main Morphology of (especially LTE base station).Distributed base station system include Base Band Unit (Base Band Unit, BBU) and
Long-distance radio frequency unit (Remote Radio Unit, RRU), common public radio interface (Common Public Radio
Interface, CPRI) as the standard interface of data transmission between two network elements.
Relative to public network Clustering, the development of private network Clustering is relatively slow, and traditional narrowband systems still use one
The framework of body base station.With the evolution of private network broadband LTE, narrow band data must carry out merging transmission with wideband data, this
The distributed base station system based on CPRI interfaces is just needed to support the fusion transmission of wide and narrow strip data.
But CPRI interfaces carry out specification for broadband data transmission, not in view of narrow band data transmits, and
And without being narrow band data reserved data channel.Therefore, existing CPRI interfaces also cannot achieve the transmission to narrow band data.
Invention content
Defect based on the above-mentioned prior art and deficiency, the present invention propose a kind of data transmission method, can utilize existing
CPRI interfaces transmit narrow band data.
In order to achieve the above object, the following technical solutions are proposed by the present invention：
A kind of data transmission method, is applied to common public radio interface, and the common public radio interface includes
Idle manufacturer's self-defining data channel；This method includes：
Receive narrow band data；
According to preset data mapping ruler, the narrow band data is mapped to the factory of the common public radio interface
In quotient's self-defining data channel, the narrow band data is made to be transmitted in manufacturer's self-defining data channel.
Preferably, described according to preset data mapping ruler, the narrow band data is mapped to the general public nothing
In manufacturer's self-defining data channel of line electrical interface, including：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The base band of the narrow band data
Character rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
Basic frame rate；
According to the data volume of the narrow band data, determine that the manufacturer's self-defining data transmitted needed for the narrow band data is logical
Road；
According to the value of each parameter, the narrow band data is mapped to the manufacturer needed for the transmission narrow band data
In self-defining data channel.
Preferably, the narrow band data is mapped to the transmission narrowband number by the value according to each parameter
According in required manufacturer's self-defining data channel, including：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；
According to the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrowband number
According to superframe quantity of the required manufacturer's self-defining data channel in 10 milliseconds, confirm that each superframe can transmit in 10 milliseconds
Narrow band data sampling point quantity；The wherein described quantity is positive integer；
According to preset mapping order, respectively in the manufacturer's self-defining data channel transmitted needed for the narrow band data
Narrow band data sampling point is mapped in each superframe in 10 milliseconds；Wherein, the quantity of mapped narrow band data sampling point, to confirm
The narrow band data sampling point that each superframe can transmit in 10 milliseconds quantity；
According to preset mapping ruler, by the remaining narrowband in narrow band data sampling point of the narrow band data in 10 milliseconds
Data sample is mapped to manufacturer's self-defining data channel needed for the transmission narrow band data in 10 milliseconds, has reflected
It penetrates in the superframe of narrow band data sampling point.
Preferably, described according to preset mapping order, respectively the manufacturer needed for the transmission narrow band data from
It defines and maps narrow band data sampling point in each superframe of the data channel in 10 milliseconds, including：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, respectively the manufacturer needed for the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the self-defining data channel in 10 milliseconds.
A kind of data transmission device, using common public radio interface, the common public radio interface includes
Idle manufacturer's self-defining data channel；The device includes：
Data receipt unit, for receiving narrow band data；
Data mapping unit, for according to preset data mapping ruler, the narrow band data being mapped to described general
In manufacturer's self-defining data channel of public wireless electrical interface, make the narrow band data in manufacturer's self-defining data channel
It is transmitted.
Preferably, the narrow band data is mapped to institute by the data mapping unit according to preset data mapping ruler
When stating in manufacturer's self-defining data channel of common public radio interface, it is specifically used for：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The base band of the narrow band data
Character rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
Basic frame rate；According to the data volume of the narrow band data, the self-defined number of manufacturer transmitted needed for the narrow band data is determined
According to channel；According to the value of each parameter, the narrow band data is mapped to the manufacturer needed for the transmission narrow band data
In self-defining data channel.
Preferably, the narrow band data is mapped to the biography by the data mapping unit according to the value of each parameter
When in manufacturer's self-defining data channel needed for the defeated narrow band data, it is specifically used for：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；Root
According to the factory needed for the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrow band data
Superframe quantity of quotient's self-defining data channel in 10 milliseconds confirms the narrow band data that each superframe can transmit in 10 milliseconds
The quantity of sampling point；The wherein described quantity is positive integer；According to preset mapping order, respectively in the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the required manufacturer's self-defining data channel in 10 milliseconds；Wherein, mapped
The quantity of narrow band data sampling point, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；It presses
According to preset mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is reflected
Manufacturer's self-defining data channel needed for the transmission narrow band data is mapped in 10 milliseconds, has mapped narrow band data
In the superframe of sampling point.
Preferably, the data mapping unit is according to preset mapping order, respectively in the transmission narrow band data
When mapping narrow band data sampling point in each superframe of the required manufacturer's self-defining data channel in 10 milliseconds, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, respectively the manufacturer needed for the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the self-defining data channel in 10 milliseconds.
A kind of data transmission device, using common public radio interface, the common public radio interface includes
Idle manufacturer's self-defining data channel；The device includes：
Memory and processor；
Wherein, the memory is connected to the processor, for storing program；
The processor, for by running the program stored in the memory, realizing following functions：
Receive narrow band data；According to preset data mapping ruler, the narrow band data is mapped to described general public
In manufacturer's self-defining data channel of radio interface, the narrow band data is made to be carried out in manufacturer's self-defining data channel
Transmission.
Preferably, the narrow band data is mapped to described general by the processor according to preset data mapping ruler
When in manufacturer's self-defining data channel of public wireless electrical interface, it is specifically used for：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The base band of the narrow band data
Character rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
Basic frame rate；According to the data volume of the narrow band data, the self-defined number of manufacturer transmitted needed for the narrow band data is determined
According to channel；According to the value of each parameter, the narrow band data is mapped to the manufacturer needed for the transmission narrow band data
In self-defining data channel.
Preferably, the narrow band data is mapped to described in the transmission by the processor according to the value of each parameter
When in manufacturer's self-defining data channel needed for narrow band data, it is specifically used for：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；Root
According to the factory needed for the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrow band data
Superframe quantity of quotient's self-defining data channel in 10 milliseconds confirms the narrow band data that each superframe can transmit in 10 milliseconds
The quantity of sampling point；The wherein described quantity is positive integer；According to preset mapping order, respectively in the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the required manufacturer's self-defining data channel in 10 milliseconds；Wherein, mapped
The quantity of narrow band data sampling point, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；It presses
According to preset mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is reflected
Manufacturer's self-defining data channel needed for the transmission narrow band data is mapped in 10 milliseconds, has mapped narrow band data
In the superframe of sampling point.
Preferably, the processor is according to preset mapping order, respectively needed for the transmission narrow band data
When mapping narrow band data sampling point in each superframe of manufacturer's self-defining data channel in 10 milliseconds, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, respectively the manufacturer needed for the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the self-defining data channel in 10 milliseconds.
Using data transmission method proposed by the present invention, after receiving narrow band data, CPRI interfaces reflect narrow band data
It is mapped in idle manufacturer's self-defining data channel of CPRI interfaces, makes narrow band data in manufacturer's self-defining data of CPRI interfaces
It is transmitted in channel, narrow band data is transmitted by existing CPRI interfaces to realize.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is the structural schematic diagram of CPRI interfaces provided in an embodiment of the present invention；
Fig. 2 is a kind of flow diagram of data transmission method provided in an embodiment of the present invention；
Fig. 3 is the general frame of the scheme in the channels VSS provided in an embodiment of the present invention that narrow band data is mapped to CPRI
Schematic diagram；
Fig. 4 is the flow diagram of another data transmission method provided in an embodiment of the present invention；
Fig. 5 is the position view of the channels VSS in the frame structure in CPRI provided in an embodiment of the present invention；
Fig. 6 is the flow diagram of another data transmission method provided in an embodiment of the present invention；
Fig. 7 is the mapping order schematic diagram provided in an embodiment of the present invention that data are mapped in the channels VSS；
Fig. 8 is PDT frame structures schematic diagram provided in an embodiment of the present invention；
Fig. 9 is the schematic diagram of PDT baseband modulations process provided in an embodiment of the present invention；
Figure 10 is mapping position schematic diagram of the PDT data samples provided in an embodiment of the present invention in the channels VSS；
Figure 11 be it is provided in an embodiment of the present invention mapped in superframes after PDT data samples according to preset mapping ruler before
Sampling point position schematic diagram in 72 superframes；
Figure 12 is the PDT data samples position provided in an embodiment of the present invention being mapped to 3072 sampling points behind the channels VSS
Schematic diagram；
Figure 13 is a kind of structural schematic diagram of data transmission device provided in an embodiment of the present invention；
Figure 14 is the structural schematic diagram of another data transmission device provided in an embodiment of the present invention.
Specific implementation mode
Technical solution of the embodiment of the present invention is suitable for carrying out the applied field of wide and narrow strip data fusion transmission by CPRI interfaces
Scape.Using technical solution of the embodiment of the present invention, it can realize and be transmitted using the existing CPRI interfaces for being used for transmission wideband data
Narrow band data.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The embodiment of the invention discloses a kind of data transmission method, this method is applied to common public radio interface
(Common Public Radio Interface, CPRI).
The structure of above-mentioned CPRI interfaces is as shown in Figure 1.CPRI defines physical layer (Layer 1) and data link layer
(Layer 2) agreement serves user, control and synchronizing information between radio frequency control equipment and radio-frequency apparatus or two is penetrated
Transmission between frequency equipment.
I/Q data channel, the channel Vendor Specific data (VSS), Ethernet numbers are defined in CPRI physical layers
According to channel, HDLC data channel, L1Inband Protocol data channel.Wherein, I/Q data channel is used for transmission broadband number
According to wideband data is transmitted in the form of A × C in I/Q data channel after sample arrangement；Vendor Specific numbers
It is used to carry out the transmission of manufacturer's self-defining data (Vendor specific Data, VSS) according to channel；Ethernet data channel
It is used for transmission Ethernet data；HDLC data channel is used for transmission Link Control data；L1InbandProtocol data channel
It is used for transmission data-signal that is related to link and directly being transmitted by physical layer.
It should be noted that the channels VSS of existing CPRI interfaces are only carved if necessary transmits a small amount of manufacturer's information, it can
To think, the channels VSS of CPRI interfaces are idle states under normal circumstances.The thought of technical solution of the embodiment of the present invention is profit
Narrow band data is transmitted with the idle channels VSS of CPRI interfaces, realizes and wide and narrow strip data fusion is carried out by existing CPRI interfaces
Transmission.
Data transmission method shown in Figure 2, that the embodiment of the present invention proposes, including：
S201, narrow band data is received；
Specifically, above-mentioned narrow band data, refers to the data that narrow-band communication system is transmitted, such as police Digital Clustering
(Police DigitalTrunking, PDT) data.
S202, according to preset data mapping ruler, the narrow band data is mapped to the common public radio and is connect
In manufacturer's self-defining data channel of mouth, the narrow band data is made to be transmitted in manufacturer's self-defining data channel.
A small amount of manufacturer's information is transmitted specifically, only being carved if necessary due to the channels VSS of CPRI interfaces, it is believed that
The channels VSS of CPRI interfaces are idle states.Therefore, the narrow band data of reception is mapped to CPRI interfaces by the embodiment of the present invention
In the channels VSS, narrow band data is made to be transmitted in the channels VSS.Narrow band data is mapped to CPRI interfaces by the embodiment of the present invention
The channels VSS in be transmitted, under the premise of not influencing wideband data in I/Q data channel transfer, connect by existing CPRI
Mouth simultaneous transmission narrow band data, realizes and CPRI interfaces is utilized to carry out wide and narrow strip data fusion transmission.
The embodiment of the present invention narrow band data is mapped to the general frame of the scheme in the channels VSS of CPRI as shown in figure 3,
CPRI protocol layers of the interface (SAP in figureCMModule, SAPSModule and SAPIQModule) on by adaptation layer MUX/DMUX by narrowband number
According to being mapped to data surface, and the channels VSS are mapped in layer 2, you can realize and narrow band data is mapped to the channels VSS.
Narrow band data is mapped in the idle channels VSS of CPRI interfaces by the embodiment of the present invention, and narrow band data is made to pass through
The VSS channel transfers of CPRI interfaces, on the basis of not influencing CPRI interfaces transmission wideband data, realization is transmitted by CPRI interfaces
Narrow band data, to realize the transmission of CPRI interface wide and narrow strip data fusions.
Optionally, in another embodiment of the present invention, the specific place that narrow band data is mapped to the channels VSS is disclosed
Reason process.It is shown in Figure 4, it is described according to preset data mapping ruler, the narrow band data is mapped to the general public affairs
Altogether in manufacturer's self-defining data channel of radio interface, including：
The value of each parameter when S402, the determining transmission narrow band data；Each parameter includes：The narrow band data
Baseband signalling rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio
The basic frame rate of interface；
Specifically, when narrow band data to be mapped to the channels VSS of CPRI interfaces, it is thus necessary to determine that utilize CPRI interfaces
The VSS channel transfers narrow band datas parameters value, narrow band data is mapped to by VSS according to the value of parameters and is led to
Road.
Above-mentioned parameters include：The baseband signalling rate Fs of narrow band data；Interpolation multiple M；It is multiplexed multiple N；Wherein, Fs
It is fixed as 4.8ksps；The basic frame rate Fc of CPRI, Fc are fixed as 3.84Msps.
S403, according to the data volume of the narrow band data, determine the self-defined number of manufacturer transmitted needed for the narrow band data
According to channel；
Specifically, the position of the channels VSS in the frame structure in CPRI is shown in Figure 5.Wherein, the size in the channels VSS
It is variable, is determined with specific reference to p value, the effect of p value divides the channels VSS and the channels Ethernet, the value range of p
It is 20~63, need to be according to actual use come value, i.e., the size of the narrow band data transmitted according to actual needs determines the channels VSS
Size, that is, determine p value size.
In embodiments of the present invention, according to the data volume of narrow band data, the channels VSS transmitted needed for the narrow band data are determined
Size.Specifically, the size in the channels VSS depends on p value, the selection of p value need to meet following formula：
LTE frame structures are 10ms synchronous with CPRI frame structures, and above-mentioned formula is defined according to 1s, is revised as 10ms
Formula is as follows afterwards：
(p-16) * 4 indicates that the number of samples that the channels VSS can transmit in a superframe, CPRI standards define p's in above formula
Value range (20≤p≤63) can determine suitable p value according to above-mentioned formula, that is, transmission narrow band data institute be determined
The size in the channels VSS needed.
S404, according to the value of each parameter, the narrow band data is mapped to needed for the transmission narrow band data
Manufacturer's self-defining data channel in.
Specifically, after by executing the VSS channel sizeds that step S403 is determined needed for transmission narrow band data, the present invention is real
Example is applied further according to the value of the parameters of transmission narrow band data, it would be desirable to which the narrow band data of transmission, which is mapped to, transmits the narrowband
In the channels VSS needed for data.
In another embodiment, it discloses and narrow band data is mapped to the VSS transmitted needed for the narrow band data
The concrete processing procedure in channel.
Shown in Figure 6, it is described narrow to be mapped to the transmission by the value according to each parameter for the narrow band data
With in manufacturer's self-defining data channel needed for data, including：
S604, according to the value of each parameter, confirm the number of narrow band data sampling point of the narrow band data in 10 milliseconds
Amount；
Specifically, the embodiment of the present invention is true according to the baseband signalling rate Fs of narrow band data, interpolation multiple M, multiplexing multiple N
The quantity of fixed narrow band data sampling point of the narrow band data in 10ms.
It is narrow in 10ms after the baseband signalling rate Fs, interpolation multiple M, multiplexing multiple N of narrow band data is determined
Quantity with data sample is：
Described in S605, the quantity of narrow band data sampling point according to the narrow band data in 10 milliseconds and the transmission
Superframe quantity of manufacturer's self-defining data channel in 10 milliseconds needed for narrow band data confirms that each superframe can in 10 milliseconds
With the quantity of the narrow band data sampling point of transmission；The wherein described quantity is positive integer；
Specifically, in a 10ms, Hyper Frame Number H values are 0-149, and basic frame S values are 0-255.
Under conditions of meeting above-mentioned formula, each superframe can averagely be assigned to/ 150 narrow band datas
Sampling point.
S606, according to preset mapping order, the self-defined number of manufacturer needed for the transmission narrow band data respectively
According to mapping narrow band data sampling point in each superframe of the channel in 10 milliseconds；Wherein, the quantity of mapped narrow band data sampling point,
For the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；
Specifically, in each inside superframes, the position L values of narrow band data sampling point are as follows：
L=64*I+J (16≤J≤p-1,0≤I≤3)
Wherein, the definition of I and J and value range are CPRI agreements regulation, and J indicates the channel number of CPRI subchannels, I
Indicate the data bin data word number of CPRI subchannels.
The embodiment of the present invention can freely set mapping order, and narrow band data is mapped in each superframe in the channels VSS
Sampling point maps a narrow band data sampling point in each superframe, that is, stores a narrow band data sampling point in each superframe.
It discloses, is mapped according to first longitudinal, the sequence laterally mapped afterwards is passing respectively in another embodiment of the present invention
Narrow band data sampling point is mapped in each superframe of manufacturer's self-defining data channel in 10 milliseconds needed for the defeated narrow band data,
Specifically, sampling point first longitudinal storage in the channels VSS, rear laterally storage, whole basic frame number is increased.Example
Such as K=3, the position of 3 sampling points storage is L=16,17,18, as K=5, the deposit positions of 5 sampling points be L=16,
17、18、19、80.It should be noted that technical solution of the embodiment of the present invention also allows user freely to set mapping narrow band data sample
The Start Super frame number of point, for example, as K=3, the position of 3 sampling points storage is L=17,18,19.
Sampling point first longitudinal mapping in the channels VSS, then the mapping order laterally mapped are as shown in Figure 7.
It is appreciated that in the actual implementation embodiment of the present invention, mapping order, such as the first cross of setting can also be flexibly set
To mapping, then longitudinal mapping etc..
S607, according to preset mapping ruler, will be in narrow band data sampling point of the narrow band data in 10 milliseconds it is surplus
Remaining narrow band data sampling point is mapped to manufacturer's self-defining data channel needed for the transmission narrow band data in 10 milliseconds,
In the superframe for having mapped narrow band data sampling point.
Specifically, after each superframe stores K sampling point, it is still remainingA sampling point needs
It stores.Mapping ruler is arranged for above-mentioned remaining narrow band data sampling point in the embodiment of the present invention, by remaining narrow band data sample
Point is mapped in the superframe for having mapped narrow band data sampling point.Wherein, above-mentioned mapping ruler may be set according to actual conditions, both
It can flexibly select to have mapped the superframe of narrow band data sampling point, to continue to map remaining narrow band data sampling point, can also to be arranged
Continue to map the quantity of remaining narrow band data sampling point in the selected superframe for having mapped narrow band data sampling point.
For example, D sampling point can be mapped in D superframe for having mapped narrow band data sampling point, i.e., each reflect
It penetrates in the superframe of narrow band data sampling point and re-maps a narrow band data sampling point.Mapping ruler is identical with the mapping ruler of K sampling point,
It is laterally stored after first longitudinal storage in the channels VSS.
Step S401 in embodiment of the method shown in Fig. 4 corresponds to the step S101 in embodiment of the method shown in FIG. 1,
The content of particular content embodiment of the method shown in Figure 1, details are not described herein again.
Step S601~S603 in embodiment of the method shown in fig. 6 is corresponded to respectively in embodiment of the method shown in Fig. 4
Step S401~S403, the content of particular content embodiment of the method shown in Figure 4, details are not described herein again.
Data transmission method disclosed by the embodiments of the present invention in order to vivider is introduced, below with PDT (Police
DigitalTrunking or Public DigitalTrunking) standard data carry out for being transmitted in the channels VSS of CPRI
Explanation.
More preferably to illustrate the content of this programme, the frame format and I/Q data format of PDT cluster standards are introduced first.
PDT frame structures are as shown in Figure 8.2 time slots are divided into 60ms, each slot length is 30ms.One time slot is by three
It is grouped as：Synchronous or embedded signaling, voice or data and CACH (downlink) or protection interval (uplink).Each frame data, packet
Include 144 symbols, character rate 4.8ksps.
For PDT baseband modulations process as shown in figure 9, after ovennodulation, I/Q data has carried out certain times on character rate
Several up-samplings.Different up-sampling multiples can be set in practice, to realize different IQ sampling rates.
In this implementation sample, PDT upsampling datas multiple, that is, difference multiple M=16 is multiplexed multiple N=4, indicates 4 road PDT
Data.It is handled according to step in embodiment, it is as follows：
In 10ms, p value is calculated according to following formula：
P=22 is calculated in formula, and 10ms is total to have 3072 PDT sampling points to need to transmit, and the channels VSS can at most carry
3600 sampling points.
In a 10ms, each superframe can averagely assign to K=3072/150=20 sampling point, be calculated according to formula
It is as shown in Figure 10 to mapping position of the sampling point in the channels VSS.
After each superframe stores total 3000 sampling points of 20 sampling points, still there is D=72 sampling point to need to store, by these
Sampling point is mapped in preceding 72 superframes, and each superframe re-maps a sampling point, the mapping phase of mapping ruler and 20 sampling points above
Together.Sampling point position after mapping in preceding 72 superframes is as shown in figure 11.
All after 3072 sampling point mappings, the PDT data samples position in the channels superframe VSS is as shown in figure 12.
The embodiment of the invention also discloses a kind of data transmission devices, are applied to common public radio interface CPRI, institute
State manufacturer's self-defining data channel that CPRI includes idle.Shown in Figure 13, which includes：
Data receipt unit 100, for receiving narrow band data；
Data mapping unit 110, for according to preset data mapping ruler, the narrow band data being mapped to described logical
With in manufacturer's self-defining data channel of public wireless electrical interface, make the narrow band data in manufacturer's self-defining data channel
In be transmitted.
Wherein, the narrow band data is mapped to described logical by data mapping unit 110 according to preset data mapping ruler
When in manufacturer's self-defining data channel of public wireless electrical interface, it is specifically used for：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The base band of the narrow band data
Character rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
Basic frame rate；According to the data volume of the narrow band data, the self-defined number of manufacturer transmitted needed for the narrow band data is determined
According to channel；According to the value of each parameter, the narrow band data is mapped to the manufacturer needed for the transmission narrow band data
In self-defining data channel.
It is described narrow to be mapped to the transmission according to the value of each parameter by data mapping unit 110 for the narrow band data
When in manufacturer's self-defining data channel needed for data, it is specifically used for：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；Root
According to the factory needed for the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrow band data
Superframe quantity of quotient's self-defining data channel in 10 milliseconds confirms the narrow band data that each superframe can transmit in 10 milliseconds
The quantity of sampling point；The wherein described quantity is positive integer；According to preset mapping order, respectively in the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the required manufacturer's self-defining data channel in 10 milliseconds；Wherein, mapped
The quantity of narrow band data sampling point, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；It presses
According to preset mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is reflected
Manufacturer's self-defining data channel needed for the transmission narrow band data is mapped in 10 milliseconds, has mapped narrow band data
In the superframe of sampling point.
Data mapping unit 110 is according to preset mapping order, respectively in the factory transmitted needed for the narrow band data
When mapping narrow band data sampling point in each superframe of quotient's self-defining data channel in 10 milliseconds, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, respectively the manufacturer needed for the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the self-defining data channel in 10 milliseconds.
Specifically, in above-described embodiment each unit specific works content, it is the interior of embodiment to refer to the above method
Hold, details are not described herein again.
The embodiment of the invention also discloses another data transmission devices, are applied to common public radio interface, described
Common public radio interface includes manufacturer's self-defining data channel of free time.Shown in Figure 14, which includes：
Memory 200 and processor 210；
Wherein, memory 200 is connect with processor 210, for storing program；
Processor 210 realizes following functions for the program by being stored in run memory 200：
Receive narrow band data；According to preset data mapping ruler, the narrow band data is mapped to described general public
In manufacturer's self-defining data channel of radio interface, the narrow band data is made to be carried out in manufacturer's self-defining data channel
Transmission.
Wherein, the narrow band data is mapped to described general public by processor 210 according to preset data mapping ruler
When in manufacturer's self-defining data channel of radio interface, it is specifically used for：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The base band of the narrow band data
Character rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
Basic frame rate；According to the data volume of the narrow band data, the self-defined number of manufacturer transmitted needed for the narrow band data is determined
According to channel；According to the value of each parameter, the narrow band data is mapped to the manufacturer needed for the transmission narrow band data
In self-defining data channel.
The narrow band data is mapped to the transmission narrow band data by processor 210 according to the value of each parameter
When in required manufacturer's self-defining data channel, it is specifically used for：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；Root
According to the factory needed for the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrow band data
Superframe quantity of quotient's self-defining data channel in 10 milliseconds confirms the narrow band data that each superframe can transmit in 10 milliseconds
The quantity of sampling point；The wherein described quantity is positive integer；According to preset mapping order, respectively in the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the required manufacturer's self-defining data channel in 10 milliseconds；Wherein, mapped
The quantity of narrow band data sampling point, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；It presses
According to preset mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is reflected
Manufacturer's self-defining data channel needed for the transmission narrow band data is mapped in 10 milliseconds, has mapped narrow band data
In the superframe of sampling point.
Processor 210 is according to preset mapping order, and the manufacturer needed for the transmission narrow band data makes by oneself respectively
When mapping narrow band data sampling point in each superframe of the adopted data channel in 10 milliseconds, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, respectively the manufacturer needed for the transmission narrow band data
Narrow band data sampling point is mapped in each superframe of the self-defining data channel in 10 milliseconds.
Specifically, in above-described embodiment various pieces specific works content, it is the interior of embodiment to refer to the above method
Hold, details are not described herein again.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (12)
1. a kind of data transmission method, which is characterized in that be applied to common public radio interface, the common public radio
Interface includes manufacturer's self-defining data channel of free time, the method includes：
Receive narrow band data；
According to preset data mapping ruler, the narrow band data is mapped to the manufacturer of the common public radio interface certainly
It defines in data channel, the narrow band data is made to be transmitted in manufacturer's self-defining data channel.
2., will be described narrow according to the method described in claim 1, it is characterized in that, described according to preset data mapping ruler
It is mapped in manufacturer's self-defining data channel of the common public radio interface with data, including：
Determine that the value of each parameter when transmitting the narrow band data, each parameter include：The baseband signalling of the narrow band data
The base of rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
This frame rate；
According to the data volume of the narrow band data, the manufacturer's self-defining data channel transmitted needed for the narrow band data is determined；
According to the value of each parameter, the manufacturer that the narrow band data is mapped to needed for the transmission narrow band data is made by oneself
In adopted data channel.
3. according to the method described in claim 2, it is characterized in that, the value according to each parameter, by the narrowband number
According to being mapped in manufacturer's self-defining data channel needed for the transmission narrow band data, including：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；
According to the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and the transmission narrow band data institute
Superframe quantity of the manufacturer's self-defining data channel needed in 10 milliseconds confirms that each superframe can transmit narrow in 10 milliseconds
Quantity with data sample, wherein the quantity is positive integer；
According to preset mapping order, manufacturer's self-defining data channel needed for the transmission narrow band data is 10 respectively
Narrow band data sampling point is mapped in each superframe in millisecond；Wherein, the quantity of mapped narrow band data sampling point, exists for confirmation
The quantity for the narrow band data sampling point that each superframe can transmit in 10 milliseconds；
According to preset mapping ruler, by the remaining narrow band data in narrow band data sampling point of the narrow band data in 10 milliseconds
Sampling point is mapped to manufacturer's self-defining data channel needed for the transmission narrow band data in 10 milliseconds, has mapped narrow
In superframe with data sample.
4. according to the method described in claim 3, it is characterized in that, described according to preset mapping order, respectively in the biography
Narrow band data sampling point is mapped in each superframe of manufacturer's self-defining data channel in 10 milliseconds needed for the defeated narrow band data,
Including：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, the manufacturer needed for the transmission narrow band data makes by oneself respectively
Narrow band data sampling point is mapped in each superframe of the adopted data channel in 10 milliseconds.
5. a kind of data transmission device, which is characterized in that common public radio interface, the common public radio is applied to connect
Mouth includes manufacturer's self-defining data channel of free time；The device includes：
Data receipt unit, for receiving narrow band data；
Data mapping unit, for according to preset data mapping ruler, the narrow band data being mapped to described general public
In manufacturer's self-defining data channel of radio interface, the narrow band data is made to be carried out in manufacturer's self-defining data channel
Transmission.
6. device according to claim 5, which is characterized in that the data mapping unit is mapped according to preset data advises
Then, specific to use when the narrow band data being mapped in manufacturer's self-defining data channel of the common public radio interface
In：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The baseband signalling of the narrow band data
The base of rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
This frame rate；According to the data volume of the narrow band data, determine that the manufacturer's self-defining data transmitted needed for the narrow band data is logical
Road；According to the value of each parameter, the manufacturer that the narrow band data is mapped to needed for the transmission narrow band data is made by oneself
In adopted data channel.
7. device according to claim 6, which is characterized in that the data mapping unit according to the value of each parameter,
It is specific to use when the narrow band data is mapped in manufacturer's self-defining data channel needed for the transmission narrow band data
In：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；According to institute
State the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and manufacturer needed for the transmission narrow band data from
Superframe quantity of the data channel in 10 milliseconds is defined, confirms the narrow band data sampling point that each superframe can transmit in 10 milliseconds
Quantity；The wherein described quantity is positive integer；According to preset mapping order, respectively needed for the transmission narrow band data
Each superframe of manufacturer's self-defining data channel in 10 milliseconds in map narrow band data sampling point；Wherein, mapped narrowband
The quantity of data sample, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；According to pre-
If mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is mapped to
Manufacturer's self-defining data channel needed for the transmission narrow band data has mapped narrow band data sampling point in 10 milliseconds
Superframe in.
8. device according to claim 7, which is characterized in that the data mapping unit according to preset mapping order,
It is mapped in each superframe of the manufacturer's self-defining data channel needed for the transmission narrow band data in 10 milliseconds respectively
When narrow band data sampling point, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, the manufacturer needed for the transmission narrow band data makes by oneself respectively
Narrow band data sampling point is mapped in each superframe of the adopted data channel in 10 milliseconds.
9. a kind of data transmission device, which is characterized in that common public radio interface, the common public radio is applied to connect
Mouth includes manufacturer's self-defining data channel of free time；The device includes：
Memory and processor；
Wherein, the memory is connected to the processor, for storing program；
The processor, for by running the program stored in the memory, realizing following functions：
Receive narrow band data；According to preset data mapping ruler, the narrow band data is mapped to the general public wireless
In manufacturer's self-defining data channel of electrical interface, the narrow band data is made to be passed in manufacturer's self-defining data channel
It is defeated.
10. device according to claim 9, which is characterized in that the processor, will according to preset data mapping ruler
When the narrow band data is mapped in manufacturer's self-defining data channel of the common public radio interface, it is specifically used for：
Determine the value of each parameter when transmitting the narrow band data；Each parameter includes：The baseband signalling of the narrow band data
The base of rate, the interpolation multiple of the narrow band data, the multiplexing multiple of the narrow band data, the common public radio interface
This frame rate；According to the data volume of the narrow band data, determine that the manufacturer's self-defining data transmitted needed for the narrow band data is logical
Road；According to the value of each parameter, the manufacturer that the narrow band data is mapped to needed for the transmission narrow band data is made by oneself
In adopted data channel.
11. device according to claim 10, which is characterized in that the processor is according to the value of each parameter, by institute
When stating narrow band data and being mapped in manufacturer's self-defining data channel needed for the transmission narrow band data, it is specifically used for：
According to the value of each parameter, the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds is confirmed；According to institute
State the quantity of narrow band data sampling point of the narrow band data in 10 milliseconds and manufacturer needed for the transmission narrow band data from
Superframe quantity of the data channel in 10 milliseconds is defined, confirms the narrow band data sampling point that each superframe can transmit in 10 milliseconds
Quantity；The wherein described quantity is positive integer；According to preset mapping order, respectively needed for the transmission narrow band data
Each superframe of manufacturer's self-defining data channel in 10 milliseconds in map narrow band data sampling point；Wherein, mapped narrowband
The quantity of data sample, for the quantity of the narrow band data sampling point that each superframe can transmit in 10 milliseconds of confirmation；According to pre-
If mapping ruler, the remaining narrow band data sampling point in narrow band data sampling point of the narrow band data in 10 milliseconds is mapped to
Manufacturer's self-defining data channel needed for the transmission narrow band data has mapped narrow band data sampling point in 10 milliseconds
Superframe in.
12. according to the devices described in claim 11, which is characterized in that the processor is according to preset mapping order, respectively
Narrowband is mapped in each superframe of manufacturer's self-defining data channel in 10 milliseconds needed for the transmission narrow band data
When data sample, it is specifically used for：
It is mapped according to first longitudinal, the sequence laterally mapped afterwards, the manufacturer needed for the transmission narrow band data makes by oneself respectively
Narrow band data sampling point is mapped in each superframe of the adopted data channel in 10 milliseconds.
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