Specific embodiment
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, completeSite preparation description, 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 onEmbodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every otherEmbodiment shall fall within the protection scope of the present invention.
In order to improve quality of service, the embodiment of the present invention provides a kind of method of cell access, and this method is applied to optical fiberIt include at least one level in compartment system, in optical fiber distribution system from access unit, the main access being connected with final stage from access unitUnit is connected at least one expanding element of main access unit, is connected at least one far-end unit of expanding element, such as schemesShown in 1, this method comprises:
101, it main access unit and each receives the information source radiofrequency signal an of cell respectively from access unit, will connect respectivelyThe information source radiofrequency signal received is converted to digital signal.
Wherein, information source radiofrequency signal include 2G (2-Generation wireless telephone technology,Two generation mobile communication technical specifications), 3G (3rd-Generation, 3rd generation mobile communication technology) and LTE (Long TermEvolution, long term evolution) information source downlink radio-frequency signal, the downlink radio-frequency signal of 2G, 3G and LTE information source passes through frequency conversion listMember and AD conversion unit become digital baseband signal after signal processing.
102, the digital signal after conversion is each sent to main access unit step by step respectively from access unit.
It is understood that assume altogether there are three from access unit, the first order from access unit be connected to the second level fromAccess unit, the second level are connected to the third level from access unit from access unit, and the third level is connected to main access from access unitUnit, then the digital signal after conversion need to be sent to the second level from access unit from access unit by the first order, and the second level is from connecingEnter unit and the first order is sent to the third level from access unit, finally from the digital signal of access unit and the digital signal of itselfPreceding two-stage is sent to main access unit from the digital signal of access unit and the digital signal of itself from access unit by the third level.
103, the digital signal received and the digital signal of itself are carried out packing framing by main access unit, pass through extensionUnit will be sent to far-end unit by the digital signal for being packaged framing.
Wherein, it after expanding element receives the downstream digital signal that main access unit is sent by laser, will receiveDownstream digital signal and the downstream broadband signal that exports of ONU or AC be combined, the digital signal after combining with certain format intoCapable framing again, is then sent at least one far-end unit for downstream digital signal.
After far-end unit receives downstream digital signal, the data of each standard are decomposited according to the format of framing, will be restoredParallel data out carries out Digital Signal Processing and recovers radiofrequency signal, and then the radiofrequency signal recovered is sent out by antennaOut, to realize indoor wireless coverage.
It should be noted that in optical fiber distribution system signal be transmitted through the optical fiber, so, set in optical fiber distribution systemThe standby electric signal that needs to convert optical signals to upon receipt of the signals carries out signal processing again, when needing to issue signal, needsOptical signal is converted electrical signals to, and then is transmitted by optical fiber.
The method of cell provided in an embodiment of the present invention access, main access unit and each receives one from access unit respectivelyThe information source radiofrequency signal of a cell, and the information source radiofrequency signal received is converted into digital signal, it then will from access unitDigital signal is sent to main access unit step by step, and then main access unit is by the digital signal of the digital signal received and itselfPacking framing is carried out, far-end unit is sent to by expanding element, compared with prior art, by from connecing in the embodiment of the present inventionEntering unit realizes the access of multiple cell, in the biggish situation of portfolio, multiple cells may be implemented and carry out wireless communication jointlyNumber in-door covering, improve quality of service.
The content of above-described embodiment description is also to retouch in an alternative embodiment of the invention to the treatment process of downlink signalThe treatment process to uplink signal has been stated, as shown in Fig. 2, this method comprises:
201, main access unit receives the digital signal at least two cells that expanding element is sent.
In optical fiber distribution system, far-end unit can will be passed through by received 2G, 3G and LTE upstream radio-frequency signal of antennaMixing unit is converted to intermediate-freuqncy signal, which is carried out analog-to-digital conversion and FPGA signal processing, and then by surpassing fiveClass line or optical fiber are transmitted to expanding element, and the digital uplink signal received is combined by expanding element, will be in the number that isolatedFrequency signal is sent to main access unit after carrying out photoelectric conversion by laser, and then to receive at least two small for main access unitThe digital signal in area.
202, main access unit carries out frame decoding to the digital signal of at least two cells, isolates each cell ID respectivelyCorresponding digital signal.
It should be noted that is received due to main access unit is optical signal, so converting firstly the need of by optical signalFor electric signal, frame decoding then is carried out to the electric signal, that is, may separate out each cell each cell of digital signal have it is smallArea's mark, the digital signal isolated are distinguished with cell ID.
203, main access unit determines the digital signal of itself corresponding first community mark.
204, main access unit will be isolated except first community according to cell ID with from the corresponding relationship of access unitThe corresponding digital signal of other cell IDs outside mark, it is corresponding from access unit to be sent to each cell ID step by step.
Wherein, it is each mainly responsible for the signal of one cell of processing from access unit, has from access unit and cell IDThere is an one-to-one relationship, main access unit can will go out the after the digital signal for determining itself corresponding first community markThe corresponding digital signal of other cell IDs outside one cell ID is sent to final stage from access unit, final stage from access unit againThe corresponding digital signal of other cell IDs in addition to itself corresponding cell ID received is sent to previous stage from connecingEnter unit, using the method sent step by step, the corresponding digital signal of each cell ID is finally respectively sent to each cellIt is corresponding from access unit.
205, the digital signal that itself corresponding first community identifies is converted to up-link radio frequency letter by main access unitNumber.
The Digital Signal Processing that first community is identified corresponding cell by main access unit is analog if signal, and is passed throughAnalog if signal is converted to uplink 2G, 3G and LTE system radiofrequency signal by mixing unit.
It should be noted that Fig. 2 is so that step 205 is implemented in after step 204 as an example, in fact, step 205 can executeAny position after step 203.
206, each the digital signal of itself the corresponding cell ID received is converted to respectively from access unitRow system radio frequency signal.
It need to be each analog intermediate frequency by the Digital Signal Processing of itself the corresponding cell ID received from access unitSignal, and analog if signal is converted to by uplink 2G, 3G and LTE system radiofrequency signal by mixing unit.
The method of cell access provided in an embodiment of the present invention, main access unit receive at least two that expanding element is sentThen the digital signal of cell carries out frame decoding, isolate the digital signal of each cell, and the digital signal of each cell is dividedIt is corresponding from access unit not to be sent to each cell, so main access unit with respectively respectively will be corresponding from access unitThe digital signal of cell is converted to up-link radiofrequency signal, completes the reception of uplink signal, compared with prior art, the present inventionBy realizing the access of multiple cell from access unit in embodiment, in the biggish situation of portfolio, may be implemented multiple smallArea carries out the in-door covering of wireless signal jointly, improves quality of service.
In order to enable optical fiber distribution system that multiple cell to be supported to access, Fig. 1 is stated in realization to method flow shown in Fig. 2Before, the subchannel reserved in CPRI agreement need to be extended, wherein first reserves sub- control channel connects for storing multiple cellInlet identity；Second reserves sub- control channel for storing cell information.
General subchannel 3 to subchannel 15 is the channel reservation in CPRI agreement.
Wherein, sub- control channel 3 is for storing multiple cell access mark, if accessed in the optical fiber distribution system multipleCell, then the information in sub- control channel 3 is as shown in the table:
When being decoded to sub- control channel 3, if detecting that the first two byte value of sub- control channel 3 is 1, remainingByte value is 0, then can determine that the Fiber Access System has accessed multiple cells.
Sub- control channel 4 is for cell information involved in storage system, shown in table specific as follows:
Cell_Num: length is 1 byte, for identifying the cell total number of system access.Value indicates for 000000011 cell is accessed, being worth indicates 2 cells of access for 00000010, and so on, the number of cells specifically accessed is with this 8 twoBinary value indicates.
Cell-Ptr1: length is 1 byte, is the pointer to object of cell 1, identifies the initial position of 1 object of cell.Occurrence indicates the sub- control channel number of 1 information of recording cell in entire control field.If 1 value of Cell-Ptr is 5, representSub- control channel 5 in store the cell information of Cell 1.
Space-Ptr1: length is 1 byte, is the next cell system information of characterization and 1 initial position pointer of cellSub- control channel interval.Such as Space-Ptr1=1, Cell-Ptr 1=5, then the system information for representing Cel12 is stored in the 6thIn a control channel, the system information position calculation formula of any one cell n are as follows: Cell-Ptr 1+ (n-1) Space-Ptr1。
Each cell information is stored in individual sub- control channel, and specific format is as shown in the table:
CELL ID: length 4bit, it is the 4 high of the 1st byte, indicates the mark of accessed cell.
Sys_Num: length 4bit, it is low 4 of the 1st byte, indicates the system type that cell is accessed.Work as Sys_When the value of Num is 1, cell access gsm system is represented；When value is 2, access WCDMA system is represented；When value is 3, access is representedGSM and WCDMA；When value is 4, access LTE system is represented；When value is 5, access LTE and gsm system are represented；When value is 6, representAccess LTE and WCDMA system；When value is 7, access tri- systems of GSM, WCDMA, LTE are represented.
BW_G: length is 1 byte, indicates the bandwidth for accessing the cell gsm system signal.
BW_W: length is 1 byte, to indicate to access the bandwidth of the cell WCDMA system signal.
BW_L: length is 1 byte, indicates the bandwidth for accessing the cell LTE system signal.
It should be noted that being a length of 32 ratio of a control word by taking rate is the base frame of 2.4576Gbit/s as an example aboveSpy, i.e. based on 4 bytes.If base frame rate is higher in CPRI agreement, i.e., the one longer words of control word length, in fieldMark is still formulated according to above-mentioned statement, only by low byte zero padding.
The method of cell provided in an embodiment of the present invention access, main access unit and each receives one from access unit respectivelyThe information source radiofrequency signal of a cell, and the information source radiofrequency signal received is converted into digital signal, it then will from access unitDigital signal is sent to main access unit step by step, and then main access unit is by the digital signal of the digital signal received and itselfPacking framing is carried out, far-end unit is sent to by expanding element, compared with prior art, by from connecing in the embodiment of the present inventionEntering unit realizes the access of multiple cell, in the biggish situation of portfolio, multiple cells may be implemented and carry out wireless communication jointlyNumber in-door covering, improve quality of service.
In order to improve quality of service, the embodiment of the present invention also provides a kind of optical fiber distribution system, as shown in figure 3, the systemIt include: at least one level from access unit 301, the main access unit 302 being connected with final stage from access unit 301 is connected to master and connectsAt least one expanding element 303 for entering unit 302 is connected at least one far-end unit 304 of expanding element.
It should be noted that Fig. 3, which merely illustrates an expanding element 303, is connected to far-end unit 304, practical each extensionUnit 303 is connected at least one far-end unit 304.
Main access unit 302 turns the information source radiofrequency signal received for receiving the information source radiofrequency signal an of cellIt is changed to digital signal；
From access unit 301, for receiving the information source radiofrequency signal an of cell, the information source radiofrequency signal received is turnedIt is changed to digital signal；
From access unit 301, it is also used to the digital signal after conversion being sent to main access unit 302 step by step；
Main access unit 302, the digital signal for being also used to receive and the digital signal of itself carry out packing framing, lead toFar-end unit 304 will be sent to by the digital signal for being packaged framing by crossing expanding element 303；
Expanding element 303, for receiving the digital signal by being packaged framing, and will be by the digital signal of packing framingIt is sent to far-end unit 304.
In an alternative embodiment of the invention, expanding element 303 are also used to send the digital signal of at least two cells；
Main access unit 302 is also used to receive the digital signal of at least two cells of expanding element transmission；To at least twoThe digital signal of a cell carries out frame decoding, isolates the corresponding digital signal of each cell ID；Determine that itself is correspondingThe digital signal of first community mark；According to cell ID with from the corresponding relationship of access unit 301, will isolate except firstThe corresponding digital signal of other cell IDs outside cell ID, it is corresponding from access unit to be sent to each cell ID step by step301；
From access unit 301, it is also used to receive the digital signal that main access unit 302 is sent；
Main access unit 302, the digital signal for being also used to identify itself corresponding first community are converted to up-linkRadiofrequency signal.
In an alternative embodiment of the invention, from access unit 301, itself corresponding cell ID for being also used to receiveDigital signal be converted to up-link radiofrequency signal.
It should be noted that being covered in optical fiber distribution system provided in an embodiment of the present invention for realizing the interior of wireless signalGai Shi further includes RNC305 (Radio Network Controller, the wireless network control being used for signal transmission in systemDevice processed), BBU306 (Building Base band Unit, baseband processing unit) and RRU307 (Radio RemoteUnit, Remote Radio Unit), it is specific as shown in Figure 4.
Optical fiber distribution system provided in an embodiment of the present invention, main access unit and each receives one respectively from access unitThe information source radiofrequency signal of cell, and the information source radiofrequency signal received is converted into digital signal, then it will be counted from access unitWord signal is sent to main access unit step by step, so main access unit by the digital signal received and the digital signal of itself intoRow is packaged framing, is sent to far-end unit by expanding element, compared with prior art, by from access in the embodiment of the present inventionUnit realizes the access of multiple cell, in the biggish situation of portfolio, multiple cells may be implemented and carry out wireless signal jointlyIn-door covering, improve quality of service.
Through the above description of the embodiments, it is apparent to those skilled in the art that the present invention can borrowHelp software that the mode of required common hardware is added to realize, naturally it is also possible to which the former is more preferably by hardware, but in many casesEmbodiment.Based on this understanding, the portion that technical solution of the present invention substantially in other words contributes to the prior artDividing can be embodied in the form of software products, which stores in a readable storage medium, such as countThe floppy disk of calculation machine, hard disk or CD etc., including some instructions are used so that computer equipment (it can be personal computer,Server or the network equipment etc.) execute method described in each embodiment of the present invention.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, anyThose familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all containLid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.