CN102801497A - Method, device and system for bearing transmission of baseband radio frequency interface - Google Patents
Method, device and system for bearing transmission of baseband radio frequency interface Download PDFInfo
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- CN102801497A CN102801497A CN2012102224972A CN201210222497A CN102801497A CN 102801497 A CN102801497 A CN 102801497A CN 2012102224972 A CN2012102224972 A CN 2012102224972A CN 201210222497 A CN201210222497 A CN 201210222497A CN 102801497 A CN102801497 A CN 102801497A
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Abstract
The invention discloses a method for bearing the transmission of a baseband radio frequency interface, comprising the following steps: converting a service signal of client equipment into a first baseband signal, wherein the client equipment is external equipment of a remote system of a radio remote unit RRU and an indoor baseband unit BBU; multiplexing the first baseband signal and a previous baseband signal between the RRU and the BBU to a second baseband signal, wherein the transmission rate of the second baseband signal is greater than the transmission rate of the previous baseband signal; and bearing the second baseband signal on a baseband radio frequency port and carrying out transmission by a line between the RRU and the BBU. The invention further discloses a base station data processing control device and a base station receiving-transmitting device and system. According to the embodiment of the invention, the service signal of the client equipment outside the remote system is mapped into the baseband signal to be transmitted; and the cost is low and the monitoring is easy to realize.
Description
Technical field
The present invention relates to communication technical field, relate in particular to the methods, devices and systems that a kind of base band radio frequency interface carries transmission.
Background technology
In wireless base system, wireless access network provides wireless access function for the user.Connect through optical fiber between RRU (Radio Remote Unit, radio frequency remoto module) and the BBU (Building Base band Unit, indoor baseband processing unit), realize the transmission of base band data between RRU and BBU.
At present; Use CPRI (Common Public Radio Interface, common public radio interface) or OB SAI (Open Base Station Architecture Initiative, open base station architecture agreement) interface between RRU and the BBU; This interface is only supply equipment use itself generally; When other base station or access device are arranged near the RRU, need to share transmission through wavelength-division multiplex technique, cost is very high.And along with BBU hotel (be meant a plurality of BBU are stacked) applied more and more, the transmission between RRU and the BBU faces the problem how to share more.
As shown in Figure 1, be the sketch map that the wavelength-division technology realizes that the transmission between RRU and the BBU is shared that passes through of prior art.Return link has only an optical fiber, and RRU and PHS (Personal Handy-phone System, mobile telephone system) base station all need be with BBU and the ITX control appliance (be the local side apparatus of PHS) of service delivery to the right side.Therefore, on simple optical fiber, need to use four kinds of wavelength to carry the two-way uplink and downlink signals.Wherein, λ 1 is that RRU sends to the CPRI signal on the BBU, and λ 3 is that BBU sends to the CPRI signal on the RRU; λ 2 is that the PHS base station sends to the signal on the ITX, and λ 4 is that ITX sends to the ethernet signal on the PHS base station.Transmitting-receiving wavelength corresponding between transceiver need be fixed up, and can not arbitrarily change.If the up-downgoing that on simple optical fiber, needs to increase other is used, so newly-increased wavelength can not conflict with the wavelength of original planning.
The wavelength-division technology of passing through of prior art realizes the shared method of transmission between RRU and the BBU, and have following shortcoming: the signal wavelength that carries on the optical fiber needs corresponding one by one planning, has increased the network design maintenance cost; And multiplexer (WDM MUX/DEMUX equipment; Hereinafter to be referred as MUX) be inactive component; Do not have corresponding Network Management Equipment to safeguard, the fiber break between RRU and MUX equipment is perhaps during the fiber break between two MUX equipment; Only can't confirm that Fault Isolation and polarization are poor from the RRU side.
Summary of the invention
Many aspects of the present invention propose the methods, devices and systems that a kind of base band radio frequency interface carries transmission, and the service signal of the client device that far-drawing system is outside is mapped in the baseband signal and transmits, and cost is low, and monitoring easily.
One aspect of the present invention provides a kind of base band radio frequency interface to carry the method for transmission, comprising:
Convert the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU;
With said first baseband signal, and the original baseband signal between said RRU and the said BBU, be multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
On the base band radio frequency interface, carry said second baseband signal, transmit through the circuit between said RRU and the said BBU.
Another aspect of the present invention provides a kind of base band radio frequency interface to carry the method for transmission, comprising:
Reception is from second baseband signal of base band radio frequency interface; Said second baseband signal is multiplexing to have the service signal of pair client device to change the back and first baseband signal of acquisition, and the original baseband signal between RRU and the BBU; Said client device is the external equipment of the far-drawing system under said RRU and the said BBU; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
Said second baseband signal is separated, obtain first baseband signal and original baseband signal, and said original baseband signal is passed to said RRU or said BBU;
Said first baseband signal is reduced into service signal, and passes to said client device.
Another aspect of the present invention provides a kind of base station data processing control apparatus, comprising:
Modular converter is used for converting the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU;
Multiplexing module, with said first baseband signal, and the original baseband signal between said RRU and the said BBU, be multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal; With,
Sending module is used on the base band radio frequency interface, carrying said second baseband signal, transmits through the circuit between said RRU and the said BBU.
Another aspect of the present invention provides a kind of base station transmitting/receiving device, comprising:
Receiver module is used to receive second baseband signal from the base band radio frequency interface; Said second baseband signal is multiplexing to have the service signal of pair client device to change the back and first baseband signal of acquisition, and the original baseband signal between RRU and the BBU; Said client device is the external equipment of the far-drawing system under said RRU and the said BBU; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
Separation module is used for said second baseband signal is separated, and obtains first baseband signal and original baseband signal, and said original baseband signal is passed to said RRU or said BBU; With,
Recovery module is used for said first baseband signal is reduced into service signal, and passes to said client device.
Another aspect of the present invention provides a kind of base band radio frequency interface to carry system for transmitting, comprises BBU and RRU;
Dispose the base station data processing control apparatus in said BBU side, dispose base station transmitting/receiving device in said RRU side;
Perhaps, dispose the base station data processing control apparatus, dispose base station transmitting/receiving device in said BBU side in said RRU side;
Perhaps, dispose base station data processing control apparatus and base station transmitting/receiving device, dispose base station data processing control apparatus and base station transmitting/receiving device in said RRU side in said BBU side.
The embodiment of the invention converts baseband signal into through the service signal of the client device that far-drawing system is outside; Again and the original baseband signal between RRU and the BBU; Be multiplexed with together in the baseband signal at a high speed, thereby be implemented in the service signal that transmits original baseband signal and client device on the single physical medium between RRU and the BBU simultaneously.The present invention can be under the situation of newly-increased physical resource, in base band link, provide high bandwidth, formation transfer service cheaply; And through detecting the signal of RRU side or BBU side, just can judge transmission line and whether break down, monitoring easily.
Description of drawings
Fig. 1 is the sketch map that the wavelength-division technology realizes that the transmission between RRU and the BBU is shared that passes through of prior art;
Fig. 2 is the schematic flow sheet that a kind of base band radio frequency interface carries the method for transmission in the embodiment of the invention;
Fig. 3 is the sketch map that a kind of ethernet signal converts baseband signal in the embodiment of the invention;
Fig. 4 is the sketch map that another kind of ethernet signal converts baseband signal in the embodiment of the invention;
Fig. 5 is the sketch map that another ethernet signal converts baseband signal in the embodiment of the invention;
Fig. 6 is the schematic flow sheet that another kind of base band radio frequency interface carries the method for transmission in the embodiment of the invention;
Fig. 7 is the structural representation of a kind of base station data processing control apparatus in the embodiment of the invention;
Fig. 8 is the structural representation of a kind of base station transmitting/receiving device in the embodiment of the invention;
Fig. 9 is the structural representation that a kind of base band radio frequency interface carries system for transmitting in the embodiment of the invention;
Figure 10 is the structural representation that another kind of base band radio frequency interface carries system for transmitting in the embodiment of the invention;
Figure 11 is the structural representation that another base band radio frequency interface carries system for transmitting in the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 2, be the schematic flow sheet that a kind of base band radio frequency interface carries the method for transmission in the embodiment of the invention.The base band radio frequency interface that present embodiment provides carries the method for transmission, may further comprise the steps:
S21 converts the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU.
S22, with said first baseband signal, and the original baseband signal between said RRU and the said BBU, be multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal.
S23 carries said second baseband signal on the base band radio frequency interface, transmit through the circuit between said RRU and the said BBU.
Wherein, client device is the equipment outside the far-drawing system under RRU and the BBU, and the physical circuit that needs to share between RRU and the BBU carries out the transmission of business datum.For example, said client device is the outside equipment that inserts of distributed base station, video monitoring equipment etc.
The service signal of said client device can be synchronizing signal, perhaps asynchronous signal.Wherein, asynchronous signal includes but not limited to Ethernet (Ethernet) signal and ATM (Asynchronous Transfer Mode, asynchronous transfer mode) signal.
In an optional execution mode; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
In another optional execution mode; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form; Said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
Need to prove; Above-mentioned steps S21 ~ S23 can be carried out by the built-in or external base station data processing control apparatus of RRU; Perhaps carry out, perhaps carry out by the built-in or external base station data processing control apparatus of client device by the built-in or external base station data processing control apparatus of BBU.
Below in conjunction with Fig. 3 ~ Fig. 5; Only the service signal with client device is an ethernet signal; It is example that original baseband signal, first baseband signal and second baseband signal are the CPRI signal, and the method that service signal is converted into baseband signal among the above-mentioned steps S21 is elaborated.
In an optional execution mode; At step S21; Said service signal with client device converts first baseband signal into; Comprise: after the ethernet signal of client device is encoded through 4B/5B, be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, generate first baseband signal of CPRI form.
Concrete; As shown in Figure 3; The form of Ethernet message (Ethernet packet) commonly used comprising: Preamble (lead code), SFD (Start Frame Delimiter; Frame demarcation sign), DA (Destination Address, target MAC (Media Access Control) address), SA (Source Address, source MAC), L/T (Length or Type; Length or type), Data/Padding (data/filling), FCS (Frame Check Sequence, frame check order) and Extension (tail expansion).
The English full name of 4B/5B coding is Encoding (decoding) of 4bit data to (from) five-bit code-groups.As shown in Figure 3, the English full name of SSD is Start-of-Stream delimiter, promptly flows starting delimiter; The English full name of ESD is End-of-Stream delimiter, and promptly stream stops delimiter; Idle is a bell idles, is generally 11111.Wherein, SSD and ESD take two code (code word) altogether, altogether 10bit; Idle takies two code, is 10bit.
In the present embodiment, the Ethernet message carried out 4B/5B coding after, the 5Bit data flow after the conversion is mapped directly in the user face data zone of eating dishes without rice or wine (IQ Data Block) of CPRI message, can obtain the baseband signal of CPRI form.Wherein, the data in the user face data zone of eating dishes without rice or wine are digitized base band datas.
In another optional execution mode; At step S21; Said service signal with client device converts first baseband signal into; Comprise: the ethernet signal of client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, generate first baseband signal of CPRI form.
Concrete; As shown in Figure 4; GFP (Generic Framing Procedure; The generic encapsulation agreement) message comprises: nuclear head (Core Header), payload head (Payload Header), Ethernet message (Ethernet packet) and CRC (Cyclic Redundancy Check is called for short CRC).
Wherein, preceding 4 bytes of GFP message are the nuclear heads, first two bytes indication GFP message length, and back two bytes are verifications of preceding two bytes.After the nuclear head is the payload head; Said payload head comprises: Payload Type Identifier (Payload Type Identifier; Abbreviation PTI), payload verification indication (Payload FCS Indicator; Abbreviation PFI), extension header sign (Extension Header Identifier; Abbreviation EHI), user's payload sign (User Payload Identifier is called for short UPI), a type error checking (Type Header Error Control) and extension header (Extension Header).
In the present embodiment, when ethernet signal is encapsulated into the GFP signal, directly the Ethernet message is encapsulated in the GFP payload; And in user's payload sign, indicate 0x1, the expression Ethernet payload.Other fields of GFP message generate according to the GFP agreement.Wherein, the Ethernet message is identical with the structure of general Ethernet message shown in Figure 3, and promptly the Ethernet message is to begin from DA, finishes to Extension.
Ethernet signal is encapsulated into after the GFP signal, again the GFP signal after the encapsulation is carried out the encapsulation of CPRI, obtain the baseband signal of CPRI form.
Need to prove that " GFP-F " shown in Figure 4 is in the generic encapsulation agreement, client's frame is encapsulated into wherein a kind of mode of generic encapsulation frame.
In another optional execution mode; At step S21; Said service signal with client device converts first baseband signal into, comprising: according to HDLC (High-Level Data Link Control, High-Level Data Link Control) agreement; The ethernet signal of client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, generates first baseband signal of CPRI form.
Need to prove; Present embodiment is except can be according to HDLC protocol encapsulation ethernet signal; Can also be according to other a series of types of HDLC agreements (HDLC-Link agreement) encapsulation ethernet signal; For example (LinkAccess Protocol-SDH, link access protocol-SDH) wait the relevant link adapting protocol for PPP (point-to-point), LAPS; Wherein, the full name of SDH is Synchronous Digital Hierarchy, i.e. SDH.
As shown in Figure 5, the principal character of HDLC-Link agreement is to use 0x7E as deciding the frame byte, confirms message length.Use the 0x7D5E byte to replace for the 0x7E in original message.
In the present embodiment, the Ethernet message is identical with the structure of general Ethernet message shown in Figure 3, and promptly the Ethernet message is to begin from DA, finishes to Extension.
The present invention can utilize the untapped bandwidth in base band radio frequency CPRI or the OBSAI band, and high bandwidth is provided, is prone to monitoring, formation transfer service cheaply, be that example describes with the baseband signal for the CPRI signal below.
In general, the CPRI signal is a kind of in following 7 kinds of signals:
CPRI wire rate option one: 614.4Mbits;
CPRI wire rate option 2:1228.8Mbits (2*614.4Mbits);
CPRI wire rate option 3:2457.6Mbits (4*614.4Mbits);
CPRI wire rate option 4:3072.0Mbits (5*614.4Mbits);
CPRI wire rate option 5:4915.2Mbits (8*614.4Mbits);
CPRI wire rate option 6:6144.0Mbits (10*614.4Mbits);
CPRI wire rate option 7:9830.4Mbits (16*614.4Mbits).
The transmission rate request of supposing the original baseband signal (the former signal of eating dishes without rice or wine) between RRU and the BBU is 2457.6Mbits.And CPRI can provide the transmission rate of 4915.2Mbits on the transmission line.If only transmit the former signal of eating dishes without rice or wine, promptly transmission line has in fact only used 2457.6Mbits, and so remaining part is exactly the untapped bandwidth in the base band radio frequency CPRI band.With respect to transmission rate is the baseband signal of 4915.2Mbits, and transmission rate is that the baseband signal of 2457.6Mbits is exactly the baseband signal of low speed.
Present embodiment converts the service signal of client device into baseband signal; Again and original baseband signal (2457.6Mbits) of the low speed between said RRU and the BBU; Be multiplexed with baseband signal (data of 4915.2Mbits) at a high speed together; On the transmission line of 4915.2Mbits, transmit then, thereby can utilize the untapped bandwidth in the base band radio frequency CPRI band, high bandwidth is provided, is prone to monitoring, formation transfer service cheaply.Not increasing newly under the situation of physical resource, be implemented in and transmit original baseband signal on the single physical medium simultaneously, and the service signal of client device.
Referring to Fig. 6, be the schematic flow sheet that another kind of base band radio frequency interface carries the method for transmission in the embodiment of the invention.The base band radio frequency interface that present embodiment provides carries the method for transmission, may further comprise the steps:
S61 receives second baseband signal from the base band radio frequency interface; Said second baseband signal is multiplexing to have the service signal of pair client device to change the back and first baseband signal of acquisition, and the original baseband signal between RRU and the BBU; Said client device is the external equipment of the far-drawing system under said RRU and the said BBU; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal.
S62 separates said second baseband signal, obtains first baseband signal and original baseband signal, and said original baseband signal is passed to said RRU or said BBU.
S63 is reduced into service signal with said first baseband signal, and passes to said client device.
Wherein, client device is the equipment outside the far-drawing system under RRU and the BBU, and the physical circuit that needs to share between RRU and the BBU carries out the transmission of business datum.For example, said client device is the outside equipment that inserts of distributed base station, video monitoring equipment etc.
The service signal of said client device can be synchronizing signal, perhaps asynchronous signal.Wherein, asynchronous signal includes but not limited to Ethernet (Ethernet) signal and ATM (Asynchronous Transfer Mode, asynchronous transfer mode) signal.
In an optional execution mode; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
When the service signal of said client device is ethernet signal; Said first baseband signal is after the ethernet signal of said client device is encoded through 4B/5B; Be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is that the ethernet signal with said client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is according to High-Level Data Link Control HDLC agreement, the ethernet signal of said client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates.
In another optional execution mode; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form; Said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
Need to prove; Above-mentioned steps S61 ~ S63 can be carried out by the built-in or external base station data processing control apparatus of RRU; Perhaps carry out, perhaps carry out by the built-in or external base station data processing control apparatus of client device by the built-in or external base station data processing control apparatus of BBU.
Referring to Fig. 7, be the structural representation of a kind of base station data processing control apparatus in the embodiment of the invention.
The base station data processing control apparatus that present embodiment provides (Radio Equipment Control, be called for short REC) can be implemented the method that base band radio frequency interface among the embodiment of above-mentioned Fig. 2 carries transmission.Said base station data processing control apparatus comprises modular converter 71, Multiplexing module 72 and sending module 73, and is specific as follows:
Modular converter 71 is used for converting the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU.
Multiplexing module 72 is used for said first baseband signal, and the original baseband signal between said RRU and the said BBU, is multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal.
Sending module 73 is used on the base band radio frequency interface, carrying said second baseband signal, transmits through the circuit between said RRU and the said BBU.
Wherein, client device is the equipment outside the far-drawing system under RRU and the BBU, and the physical circuit that needs to share between RRU and the BBU carries out the transmission of business datum.For example, said client device is the outside equipment that inserts of distributed base station, video monitoring equipment etc.
The service signal of said client device can be synchronizing signal, perhaps asynchronous signal.Wherein, asynchronous signal includes but not limited to Ethernet (Ethernet) signal and ATM (Asynchronous Transfer Mode, asynchronous transfer mode) signal.
In an optional execution mode; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
When the service signal of said client device is ethernet signal; Said modular converter 71 is encoded the ethernet signal of client device through 4B/5B after; Be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, generate first baseband signal of CPRI form;
Perhaps, said modular converter 71 is encapsulated into the ethernet signal of client device in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and generates first baseband signal of CPRI form;
Perhaps, said modular converter 71 is according to High-Level Data Link Control HDLC agreement, and the ethernet signal of client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, generates first baseband signal of CPRI form.
In another optional execution mode; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form; Said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
Referring to Fig. 8, be the structural representation of a kind of base station transmitting/receiving device in the embodiment of the invention.
The base station transmitting/receiving device that present embodiment provides (Radio Equipment, be called for short RE) can be implemented the method that base band radio frequency interface among the embodiment of above-mentioned Fig. 6 carries transmission.Said base station transmitting/receiving device comprises receiver module 81, separation module 82 and recovery module 83, and is specific as follows:
The service signal of said client device can be synchronizing signal, perhaps asynchronous signal.Wherein, asynchronous signal includes but not limited to Ethernet (Ethernet) signal and ATM (Asynchronous Transfer Mode, asynchronous transfer mode) signal.
In an optional execution mode; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
When the service signal of said client device is ethernet signal; Said first baseband signal is after the ethernet signal of said client device is encoded through 4B/5B; Be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is that the ethernet signal with said client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is according to High-Level Data Link Control HDLC agreement, the ethernet signal of said client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates.
In another optional execution mode; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form; Said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
Referring to Fig. 9, be the structural representation that a kind of base band radio frequency interface carries system for transmitting in the embodiment of the invention.The base band radio frequency interface that present embodiment provides carries system for transmitting, comprises indoor baseband processing unit 91 (hereinafter to be referred as BBU) and radio frequency remoto module 92 (hereinafter to be referred as RRU).
Wherein, the BBU side disposes the base station data processing control apparatus 93 (hereinafter to be referred as REC) among the embodiment of above-mentioned Fig. 7, disposes the base station transmitting/receiving device 94 (hereinafter to be referred as RE) among the embodiment of above-mentioned Fig. 8 in the RRU side.
Present embodiment is only to be provided with first client device 95 near BBU; Near RRU, be provided with second client device 96; And it is example to second client device 96 that first client device 95 needs to send service signal through the circuit between BBU and the RRU, and the method for the base band radio frequency interface being carried transmission describes.
Be transferred to from REC on the direction of RE at signal, in REC, will be converted into first baseband signal from the service signal of first client device 95; Then with said first baseband signal, and original baseband signal of the low speed of BBU on the RRU direction, be multiplexed with second baseband signal at a high speed together, again through the fibre circuit between BBU and the RRU, second baseband signal at a high speed is delivered to the RE near-end.
RE receives second baseband signal at a high speed, and second baseband signal of said high speed is separated, and obtains the original baseband signal and first baseband signal.Send original baseband signal to RRU then, handle by original wireless module.And, first baseband signal is reduced to service signal, and sends second client device 96 to.
Referring to Figure 10, be the structural representation that another kind of base band radio frequency interface carries system for transmitting in the embodiment of the invention.The base band radio frequency interface that present embodiment provides carries system for transmitting, comprises indoor baseband processing unit 101 (hereinafter to be referred as BBU) and radio frequency remoto module 102 (hereinafter to be referred as RRU).
Wherein, the BBU side disposes the base station transmitting/receiving device 103 (hereinafter to be referred as RE) among the embodiment of above-mentioned Fig. 8, disposes the base station data processing control apparatus 104 (hereinafter to be referred as REC) among the embodiment of above-mentioned Fig. 7 in the RRU side.
Present embodiment is only to be provided with first client device 105 near BBU; Near RRU, be provided with second client device 106; And it is example to first client device 105 that second client device 106 needs to send service signal through the circuit between BBU and the RRU, and the method for the base band radio frequency interface being carried transmission describes.
Be transferred to from REC on the direction of RE at signal, in REC, will be converted into first baseband signal from the service signal of second client device 106; Then with said first baseband signal, and original baseband signal of the low speed of RRU on the BBU direction, be multiplexed with second baseband signal at a high speed together, again through the fibre circuit between BBU and the RRU, second baseband signal at a high speed is delivered to the RE near-end.
RE receives second baseband signal at a high speed; And second baseband signal of said high speed separated, obtain the original baseband signal and first baseband signal, send original baseband signal to BBU then; And first baseband signal is reduced to service signal, and sends first client device 105 to.
Referring to Figure 11, be the structural representation that another base band radio frequency interface carries system for transmitting in the embodiment of the invention.The base band radio frequency interface that present embodiment provides carries system for transmitting, comprises indoor baseband processing unit 111 (hereinafter to be referred as BBU) and radio frequency remoto module 112 (hereinafter to be referred as RRU).
Wherein, the BBU side disposes the base station transmitting/receiving device among the embodiment of base station data processing control apparatus and above-mentioned Fig. 8 among the embodiment of above-mentioned Fig. 7; And the RRU side disposes the base station transmitting/receiving device among the embodiment of base station data processing control apparatus and above-mentioned Fig. 8 among the embodiment of above-mentioned Fig. 7 equally.
Present embodiment is provided with second client device 114 and is example only near BBU, to be provided with first client device 113 near RRU, the method for the base band radio frequency interface being carried transmission describes.
Present embodiment can be realized bidirectional data transfers, on down direction, with the service signal of first client device, 113 to second client devices 114, multiplexingly in baseband signal, transmits, and its transmission method is identical with the embodiment of above-mentioned Fig. 9; On up direction, with the service signal of second client device, 114 to first client devices 113, multiplexingly in baseband signal, transmit, its transmission method is identical with the embodiment of above-mentioned Figure 10, does not repeat them here.
Need to prove that when BBU side configuring base station data processing control apparatus, said base station data processing control apparatus can be arranged on BBU inside, also can be arranged on the BBU outside.When BBU side configurating base station R-T unit, said base station transmitting/receiving device can be arranged on BBU inside, also can be arranged on the BBU outside.When RRU side configuring base station data processing control apparatus, said base station data processing control apparatus can be arranged on RRU inside, also can be arranged on the RRU outside.When RRU side configurating base station R-T unit, said base station transmitting/receiving device can be arranged on RRU inside, also can be arranged on the RRU outside.
The base band radio frequency interface that the embodiment of the invention provides carries system for transmitting; Because the configuration of cells that is used for processing base band signals and service signal is in BBU side and RRU side; Therefore through detecting the signal of RRU side or BBU side; Whether just can judge transmission line and break down (for example judging whether the optical fiber between RRU and the MUX equipment interrupts), Fault Isolation and polarization are good, easily monitoring.
The base band radio frequency interface that the embodiment of the invention provides carries the methods, devices and systems of transmission; Service signal through the client device that far-drawing system is outside converts baseband signal into; Again and the original baseband signal between RRU and the BBU; Be multiplexed into together in the baseband signal at a high speed, thereby be implemented in the service signal that transmits original baseband signal and client device on the single physical medium between RRU and the BBU simultaneously.The present invention can be under the situation of newly-increased physical resource, in base band link, provide high bandwidth, formation transfer service cheaply; And through detecting the signal of RRU side or BBU side, just can judge transmission line and whether break down, monitoring easily.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
The above is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also are regarded as protection scope of the present invention.
Claims (17)
1. a base band radio frequency interface carries the method for transmitting, and it is characterized in that, comprising:
Convert the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU;
With said first baseband signal, and the original baseband signal between said RRU and the said BBU, be multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
On the base band radio frequency interface, carry said second baseband signal, transmit through the circuit between said RRU and the said BBU.
2. base band radio frequency interface as claimed in claim 1 carries the method for transmission; It is characterized in that; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
3. base band radio frequency interface as claimed in claim 1 carries the method for transmission; It is characterized in that; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form, and said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
4. base band radio frequency interface as claimed in claim 2 carries the method for transmission, it is characterized in that the service signal of said client device is an ethernet signal;
Said service signal with client device converts first baseband signal into, comprising:
Behind the ethernet signal process 4B/5B coding with client device, be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, generate first baseband signal of CPRI form;
Perhaps, the ethernet signal of client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, generate first baseband signal of CPRI form;
Perhaps,, the ethernet signal of client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, generates first baseband signal of CPRI form according to High-Level Data Link Control HDLC agreement.
5. a base band radio frequency interface carries the method for transmitting, and it is characterized in that, comprising:
Reception is from second baseband signal of base band radio frequency interface; Said second baseband signal is multiplexing to have the service signal of pair client device to change the back and first baseband signal of acquisition, and the original baseband signal between RRU and the BBU; Said client device is the external equipment of the far-drawing system under said RRU and the said BBU; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
Said second baseband signal is separated, obtain said first baseband signal and said original baseband signal, and said original baseband signal is passed to said RRU or said BBU;
Said first baseband signal is reduced into said service signal, and passes to said client device.
6. base band radio frequency interface as claimed in claim 5 carries the method for transmission; It is characterized in that; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
7. base band radio frequency interface as claimed in claim 5 carries the method for transmission; It is characterized in that; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form, and said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
8. base band radio frequency interface as claimed in claim 6 carries the method for transmission, it is characterized in that the service signal of said client device is an ethernet signal;
Said first baseband signal is after the ethernet signal of said client device is encoded through 4B/5B, to be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is that the ethernet signal with said client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is according to High-Level Data Link Control HDLC agreement, the ethernet signal of said client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates.
9. a base station data processing control apparatus is characterized in that, comprising:
Modular converter is used for converting the service signal of client device into first baseband signal; Said client device is the external equipment of the far-drawing system under radio frequency remoto module RRU and the indoor baseband processing unit BBU;
Multiplexing module is used for said first baseband signal, and the original baseband signal between said RRU and the said BBU, is multiplexed with second baseband signal; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal; With,
Sending module is used on the base band radio frequency interface, carrying said second baseband signal, transmits through the circuit between said RRU and the said BBU.
10. base station data processing control apparatus as claimed in claim 9; It is characterized in that; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
11. base station data processing control apparatus as claimed in claim 9; It is characterized in that; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form, and said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
12. base station data processing control apparatus as claimed in claim 10 is characterized in that, the service signal of said client device is an ethernet signal;
Said modular converter is mapped in the user face data zone of eating dishes without rice or wine of CPRI message after the ethernet signal of client device is encoded through 4B/5B, generates first baseband signal of CPRI form;
Perhaps, said modular converter is encapsulated into the ethernet signal of client device in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and generates first baseband signal of CPRI form;
Perhaps, said modular converter is according to High-Level Data Link Control HDLC agreement, and the ethernet signal of client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, generates first baseband signal of CPRI form.
13. a base station transmitting/receiving device is characterized in that, comprising:
Receiver module is used to receive second baseband signal from the base band radio frequency interface; Said second baseband signal is multiplexing to have the service signal of pair client device to change the back and first baseband signal of acquisition, and the original baseband signal between RRU and the BBU; Said client device is the external equipment of the far-drawing system under said RRU and the said BBU; The transmission rate of said second baseband signal is greater than the transmission rate of said original baseband signal;
Separation module is used for said second baseband signal is separated, and obtains said first baseband signal and said original baseband signal, and said original baseband signal is passed to said RRU or said BBU; With,
Recovery module is used for said first baseband signal is reduced into said service signal, and passes to said client device.
14. base station transmitting/receiving device as claimed in claim 13; It is characterized in that; Said first baseband signal is the baseband signal of common public radio interface CPRI form; Said original baseband signal is the baseband signal of CPRI form, and said second baseband signal is the baseband signal of CPRI form, and said base band radio frequency interface is the CPRI interface.
15. base station transmitting/receiving device as claimed in claim 13; It is characterized in that; Said first baseband signal is the baseband signal of open base station architecture agreement OBSAI form; Said original baseband signal is the baseband signal of OBSAI form, and said second baseband signal is the baseband signal of OBSAI form, and said base band radio frequency interface is the OBSAI interface.
16. base station transmitting/receiving device as claimed in claim 14 is characterized in that, the service signal of said client device is an ethernet signal;
Said first baseband signal is after the ethernet signal of said client device is encoded through 4B/5B, to be mapped in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is that the ethernet signal with said client device is encapsulated in the generic encapsulation agreement GFP signal, more said GFP signal is changed, and the baseband signal of the CPRI form that generates;
Perhaps, said first baseband signal is according to High-Level Data Link Control HDLC agreement, the ethernet signal of said client device is encapsulated in the user face data zone of eating dishes without rice or wine of CPRI message, and the baseband signal of the CPRI form that generates.
17. a base band radio frequency interface carries system for transmitting, it is characterized in that, comprises radio frequency remoto module RRU and indoor baseband processing unit BBU; Dispose like each described base station data processing control apparatus of claim 9 ~ 12 in said BBU side, dispose like each described base station transmitting/receiving device of claim 13 ~ 16 in said RRU side;
Perhaps, dispose like each described base station data processing control apparatus of claim 9 ~ 12, dispose like each described base station transmitting/receiving device of claim 13 ~ 16 in said BBU side in said RRU side;
Perhaps, dispose like each described base station data processing control apparatus of claim 9 ~ 12 in said BBU side, and like each described base station transmitting/receiving device of claim 13 ~ 16; Dispose like each described base station data processing control apparatus of claim 9 ~ 12 in said RRU side, and like each described base station transmitting/receiving device of claim 13 ~ 16.
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| CN2012102224972A CN102801497A (en) | 2012-06-29 | 2012-06-29 | Method, device and system for bearing transmission of baseband radio frequency interface |
| PCT/CN2013/070655 WO2014000439A1 (en) | 2012-06-29 | 2013-01-18 | Method, apparatus and system for baseband rf interface bearer transmission |
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| CN2012102224972A CN102801497A (en) | 2012-06-29 | 2012-06-29 | Method, device and system for bearing transmission of baseband radio frequency interface |
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| CN104994090A (en) * | 2015-06-29 | 2015-10-21 | 上海华为技术有限公司 | Data frame conversion method and device, communication node and communication system |
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