Summary of the invention
Embodiment of the present invention technical problem to be solved is, the method and apparatus of data processing in a kind of distributed base station and distributed base station is provided.Can solve in distributed base station of the prior art and lower deployment cost high deficiency higher to bandwidth demand.
In order to solve the problems of the technologies described above, first aspect present invention provides the processing method of data in a kind of distributed base station, comprising:
The transmission rate of the initial data of transmitting between monitoring BBU Base Band Unit and RRU long-distance radio frequency unit;
Judge that whether described transmission rate surpasses preset value, if yes, compresses processing by described initial data.
In the possible implementation of the first, describedly described initial data compressed to the step of processing comprise:
The described initial data of up link is compressed to processing; And/or
The described initial data of down link is compressed to processing.
In conjunction with the possible implementation of the first of first aspect, in the possible implementation of the second, the described described initial data by down link is compressed the step of processing and is comprised:
Described BBU being detected is OFDM orthogonal frequency-division multiplex singal to the signal of described RRU transmission;
Controlling described RRU is inserted into preset CP Cyclic Prefix in the frame of described ofdm signal.
In conjunction with the possible implementation of the first of first aspect, in the third possible implementation,
The described described initial data by up link is compressed the step of processing and is comprised:
Obtain the first requirement value of the received signal quality of described BBU;
According to this first requirement value, adjust the quantification bit wide of described initial data.
In conjunction with the third possible implementation of first aspect, in the 4th kind of possible implementation, described the step of adjusting the quantification bit wide of described initial data according to this first requirement value is comprised:
According to described first requirement value, calculate the noise size adding, and adopt Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
In conjunction with the possible implementation of the first of first aspect, in the 5th kind of possible implementation,
Obtain the second required value of the received signal quality of described RRU;
According to this second required value, adjust the quantification bit wide of described initial data.
In conjunction with the 5th kind of possible implementation of first aspect, in the 6th kind of possible implementation, described the step of adjusting the quantification bit wide of described initial data according to this second required value is comprised:
According to described the second required value, calculate the noise size adding, and adopt Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
The third possible implementation and the 6th kind of possible implementation in conjunction with first aspect, in the 7th kind of possible implementation, described received signal quality comprises any in signal to noise ratio snr, Signal to Interference plus Noise Ratio SINR, Reference Signal Received Power RSRP and carrier-in-interference noise ratio CINR.
Second aspect present invention provides the processing unit of data in a kind of distributed base station, comprising:
Monitoring modular, for monitoring the transmission rate of the initial data of transmitting between BBU Base Band Unit and RRU long-distance radio frequency unit;
Compression module, for judging that whether described transmission rate surpasses preset value, if yes, compresses processing by described initial data.
In the possible implementation of the first, described compression module comprises:
Up compression unit, for compressing processing by the described initial data of up link; And/or
Descending compression unit, for compressing processing by the described initial data of down link.
In conjunction with the possible implementation of the first of second aspect, in the possible implementation of the second, described descending compression unit comprises:
Detecting unit is OFDM orthogonal frequency-division multiplex singal for detection of the signal to described BBU to described RRU transmission;
Control unit, is inserted into preset CP Cyclic Prefix the frame of described ofdm signal for controlling described RRU.
In conjunction with the possible implementation of the first of second aspect, in the third possible implementation, described up compression unit comprises:
The first acquiring unit, for obtaining the first requirement value of the received signal quality of described BBU;
The first adjustment unit, for adjusting the quantification bit wide of described initial data according to this first requirement value.
The third possible implementation in conjunction with second aspect, in the 4th kind of possible implementation, described the first adjustment unit is big or small for calculate the noise adding according to described first requirement value, and adopts Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
In conjunction with the possible implementation of the first of second aspect, in the 5th kind of possible implementation, described descending compression unit comprises:
Second acquisition unit, for obtaining the second required value of the received signal quality of described RRU;
The second adjustment unit, for adjusting the quantification bit wide of described initial data according to this second required value.
The 5th kind of possible implementation in conjunction with second aspect, in the 6th kind of possible implementation, described the second adjustment unit is big or small for calculating according to described the second required value the noise adding, and adopts Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
In conjunction with the third possible implementation of second aspect and any in the 6th kind of possible implementation, in the 7th kind of possible implementation, described received signal quality comprises any in signal to noise ratio snr, Signal to Interference plus Noise Ratio SINR, Reference Signal Received Power RSRP and carrier-in-interference noise ratio CINR.
Implement the embodiment of the present invention, there is following beneficial effect:
By the monitoring to the transmission rate of the initial data of transmitting between BBU in distributed base station and RRU, when this transmission rate is greater than preset value, described initial data is compressed to processing, can effectively reduce the processing expenditure of BBU and RRU hardware device, avoid the deficiency of hardware device hardware handles ability and cause the loss of data, improve the reliability of communication system.Meanwhile, avoid the restriction of the communication line bandwidth between BBU and RRU and redeploy hardware resource, having reduced the cost of communication system volume expansion.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1 to Fig. 5, be the structural representation (hereinafter to be referred as processing unit 1) of the processing unit of data in a kind of distributed base station of the embodiment of the present invention, this processing unit 1 comprises:
Monitoring modular 11, for monitoring the transmission rate of the initial data of the transmission between BBU Base Band Unit and RRU long-distance radio frequency unit.
Concrete, distributed base station is the RRU(BaseBand Unit in traditional macro base station, Base Band Unit, be called for short BBU) and RRU(Remote Radio Unit, long-distance radio frequency unit, be called for short RRU) separation, adopt optical fiber or other transmission medium that the two is coupled together, between BBU and RRU, definition has unified interface standard simultaneously, as CPRI(Common Public Radio Interface, common public radio interface) standard and OBSAI(Open Base Station Architecture Initiative, Open Base Station Architecture alliance) standard.The transmission rate of the initial data of transmitting between BBU and RRU in monitoring modular 11 monitoring distributed base stations, unit Available Bit Rate or the baud rate of transmission rate represent, the data transmission rate of the initial data between the two can be determined by system bandwidth and sampling rate, for example, at a LTE(Long Term Evolution, Long Term Evolution plan, abbreviation LTE) in system, system bandwidth is 20MHz, quantizing bit wide is 16 bits, antenna number is 4, sector number is 3, in this LTE system, the transmission rate of the initial data between BBU and RRU is 11.8Gbps.
Compression module 12, for judging that whether described transmission rate surpasses preset value, if yes, compresses processing by described initial data.
Concrete, the transmission rate of the initial data of transmitting between BBU and RRU is higher, requirement to the hardware handles ability of BBU and RRU will be higher, when the transmission rate of the initial data of transmitting between the two exceeds the disposal ability of BBU and RRU, can cause the loss of initial data, reduce the reliability of hardware device, by the preset value of a transmission rate is set, when the transmission rate of the initial data that compression module 12 obtains at judgement detection module 11 is greater than this preset value, this initial data is compressed to processing, reduce the processing expenditure of BBU and RRU equipment, prevent hardware device overload and cause loss of data.
Be understandable that, the processing method providing of the embodiment of the present invention not only can be applied to the data of transmitting between BBU and RRU, can also be applied to other equipment transmitting terminal and receiving terminal between the data transmitted.The data of transmitting between equipment transmitting terminal and equipment receiving terminal are digital signal, when the transmission rate of the data of transmitting between equipment transmitting terminal and equipment receiving terminal being detected over predetermined value, the data of this transmission are compressed to processing.
Further, referring to Fig. 2, compression module 12 comprises:
Up compression unit 121, for compressing processing by the described initial data of up link.
Descending compression unit 122, for compressing processing by the described initial data of down link.
Concrete, in distributed base station, up link is that distributed base station receives the signal from mobile terminal, in this distributed base station inside, show as RRU and transmit initial data to BBU, down link is that distributed base station transmits to terminal equipment, in this distributed base station inside, show as BBU and transmit initial data to RRU, the up link in distributed base station and the initial data in down link are compressed, can further reduce the hardware handles expense of BBU and RRU.
Preferably, referring to Fig. 3, up compression unit 121 comprises:
The first acquiring unit 1211, for obtaining the first requirement value of the received signal quality of described BBU.
The first adjustment unit 1212, for adjusting the quantification bit wide of described initial data according to this first requirement value.
Concrete, quantizing bit wide, be in the distributed base station of 12Bit position, in up link, the received signal quality of BBU comprises SNR(Signal to Noise Ratio, signal to noise ratio, be called for short SNR), SINR(Signal to Interference plus Noise Ratio, Signal to Interference plus Noise Ratio, be called for short SINR), RSRP(Reference Signal Receiving Power, Reference Signal Received Power, be called for short RSRP) and CINR(Carrier to Interference plus Noise Ratio, carrier-in-interference noise ratio, abbreviation CINR) any in.Definite method of received signal quality is: according to the received signal quality of current quality of uplink signal or up historical statistics signal quality information acquisition terminal equipment, if a plurality of terminal equipments adopt time division multiplexing access base station, can compress for each user, if can not distinguish a plurality of terminal equipments, adopt code division multiplexing or OFDMA(Orthogonal Frequency Division Multiple Access, OFDM, be called for short OFDMA) etc. mode access, now corresponding each terminal equipment has a received signal quality, can choose received signal quality maximum in a plurality of terminal equipments or average or adopt other modes to calculate, the present invention is not restricted.Transfer of data can be based on OBSAI(Open Base Station Architecture Initiative, open architecture of base station alliance, be called for short OBSAI) interface, CPRI(Common Public Radio Interface, common public radio interface, be called for short CPRI) etc., transmission medium comprises the wire transmission media such as twisted-pair feeder, coaxial cable or optical fiber and comprises the wireless transmission mediums such as radio wave, microwave, infrared ray or laser.
Definitional loss of energy thresholding, performance loss thresholding, for introducing the received signal quality losing after quantizing noise, represents with the decibel dB of unit.The first acquiring unit 1211 obtains the first requirement value of the received signal quality of BBU, first requirement value is that communication system is when design, the rated value that the received signal quality of requirement receiving terminal reaches, receiving terminal is BBU herein, first requirement value herein comprises performance loss thresholding.The first adjusting module 1212 is adjusted the quantification bit wide of described initial data according to this first requirement value, computational methods are for example:
Suppose signal power Psbe 1, while moving to right break-in operation, the quantizing noise of N bits issignal to noise ratio snr=10*lg (Ps/ Pn)=10*lg (1/Pn), Pnfor the power that comprises thermal noise except noise power, the signal to noise ratio of introducing after quantizing noise isperformance loss thresholding isaccording to snr computation, obtain Pn, then trafficability characteristic loss of energy thresholding obtains quantizing noisequantification bit wide N after utilizing corresponding computing formula to be adjusted, as shown in table 1, the quantification bit wide of supposing transfer of data between BBU and RRU is 13Bit, the first acquiring unit 1211 is all less than original fixedly bit wide 13Bit according to signal to noise ratio and the quantification bit wide after the adjustment of performance loss thresholding obtained, can effectively reduce the transmission rate of initial data, reduce the processing expenditure of hardware device.
| SNR（dB） | Performance loss thresholding (dB) | Quantize bit wide (Bit) |
| <0 | 0.1 | 3 |
| 0<=SNR<5 | 0.2 | 3 |
| 5<=SNR<10 | 0.3 | 4 |
| 10<=SNR<15 | 0.4 | 4 |
| 15<=SNR<20 | 0.5 | 5 |
| 20<=SNR<25 | 0.8 | 6 |
| 25<=SNR<30 | 1.5 | 6 |
| SNR>=30 | 2 | 7 |
Table 1
Wherein, in table 1, quantize to have increased in bit wide the sign bit of 1Bit, consider the requirement of peak profile simultaneously, can suitably increase quantification bit wide, might not quantize bit wide according to above-mentioned computational methods adjustment, also can adopt additive method to adjust quantification bit wide, the quantification bit wide after adjustment is compared with the former quantification bit wide fixing and to be remained minimizing, can reduce the transmission rate of initial data between BBU and RRU.
Preferably, the first adjustment unit 1212 or the second adjustment unit 1222 are for adopting Dither algorithm to compress processing to initial data according to received signal quality, according to signal to noise ratio and performance loss thresholding, determine the noise size that Dither adds, mode that also can employing table 3 transmits.
Signal transformat in optical fiber or other transmission mediums:
| Indication information (x bit) | Business datum (y bit) |
Table 2
In table 2, business datum represents the bit number of initial data, the bit number after indication information represents this original data signal to compress, as needing 32 bits originally, a plural number represented (real part 16 bits, imaginary part 16 bits), after compression, as long as 8*2bit, be compressed to original 50%.Indication information is exemplified below:
| Indication information | Real part or imaginary part bit number after compression |
| 0000 | 1 |
| 0001 | 2 |
| 0010 | 3 |
| 0011 | 4 |
| 0100 | 5 |
| 0101 | 6 |
| 0110 | 7 |
| 0111 | 8 |
| 1000 | 9 |
| 1001 | 10 |
| 1010 | 11 |
| 1011 | 12 |
| 1100 | 13 |
| 1101 | 14 |
| 1110 | 15 |
| 1111 | 16 |
Table 3
Meanwhile, in order to reduce the needed bit number of indication information, also can carry out segment processing, as above in table, compression bit can only be 2,4,6,8,10,12,14,16.
Preferably, descending compression unit 122 comprises:
Second acquisition unit 1221, for obtaining the second required value of the received signal quality of described RRU.
The second adjustment unit 1222, for adjusting the quantification bit wide of described initial data according to this second required value.
Concrete, the compression method of this descending compression unit 122 is similar to up compression unit, herein Ao Shu no longer.
Preferably, descending compression unit 122 comprises:
Detecting unit 1223 is OFDM orthogonal frequency-division multiplex singal for detection of the signal to described BBU to described RRU transmission.
Control unit 1224, is inserted into preset CP Cyclic Prefix the frame of described ofdm signal for controlling described RRU.
Concrete, in the prior art, BBU carries out OFDM(Orthogonal Frequency Division Multiplexing to signal, OFDM, is called for short OFDM) need in OFDM frame, insert CP(Cyclic Prefix, Cyclic Prefix after modulation, be called for short CP), suppose to comprise 14 OFDM symbols in an OFDM frame, CP takies the length of an OFDM symbol, causes the transmission rate of the down link of BBU to RRU to increase.It is ofdm signal to the signal of RRU transmission that detecting unit 1223 detects BBU, control unit 1224 is controlled RRU and preset CP is inserted in the frame of ofdm signal, like this, the RRU side that operates in of inserting CP is realized, can effectively reduce the transmission rate of down link.
By the monitoring to the transmission rate of the initial data of transmitting between BBU in distributed base station and RRU, when this transmission rate is greater than preset value, described initial data is compressed to processing, can effectively reduce the processing expenditure of BBU and RRU hardware device, avoid the deficiency of hardware device hardware handles ability and cause the loss of data, improve the reliability of communication system.Meanwhile, avoid the restriction of the communication line bandwidth between BBU and RRU and redeploy hardware resource, having reduced the cost of communication system volume expansion.
Referring to Fig. 6, another kind of structural representation for the data processing equipment of a kind of distributed base station of the embodiment of the present invention, comprise processor 61, memory 62, input unit 63 and output device 64, the quantity of the processor 61 in data processing equipment 1 can be one or more, and it is example that Fig. 6 be take a processor.In some embodiments of the present invention, processor 61, memory 62, input unit 63 and output device 64 can be connected by bus or other modes, in Fig. 6, with bus, are connected to example.
Wherein, in memory 62, store batch processing code, and processor 61 is for calling the program code of memory 62 storages, for carrying out following operation:
The transmission rate of the initial data of the transmission between monitoring BBU Base Band Unit and RRU long-distance radio frequency unit;
Judge that whether described transmission rate surpasses preset value, if yes, compresses processing by described initial data.
Further, in some embodiments of the invention, processor 61 is for carrying out:
The described initial data of up link is compressed to processing; And/or
The described initial data of down link is compressed to processing.
In other embodiment of the present invention, processor 61 is for carrying out:
Obtain the first requirement value of the received signal quality of described BBU;
According to this first requirement value, adjust the quantification bit wide of described initial data.
Further, in some embodiments of the invention, processor 61 describedly comprises the step of adjusting the quantification bit wide of described initial data according to this first requirement value for carrying out:
According to described first requirement value, calculate the noise size adding, and adopt Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
In some embodiments of the invention, processor 61 is for carrying out:
Obtain the second required value of the received signal quality of described RRU;
According to this second required value, adjust the quantification bit wide of described initial data.
Further, in some embodiments of the invention, processor 61 describedly comprises the step of adjusting the quantification bit wide of described initial data according to this second required value for carrying out:
According to described the second required value, calculate the noise size adding, and adopt Dither dither algorithm to adjust the quantification bit wide of described initial data according to this noise size.
In some embodiments of the invention, processor 61 is for carrying out:
Described BBU being detected is OFDM orthogonal frequency-division multiplex singal to the signal of described RRU transmission;
Controlling described RRU is inserted into preset CP Cyclic Prefix in the frame of described ofdm signal.
By the monitoring to the transmission rate of the initial data of transmitting between BBU in distributed base station and RRU, when this transmission rate is greater than preset value, described initial data is compressed to processing, can effectively reduce the processing expenditure of BBU and RRU hardware device, avoid the deficiency of hardware device hardware handles ability and cause the loss of data, improve the reliability of communication system.Meanwhile, avoid the restriction of the communication line bandwidth between BBU and RRU and redeploy hardware resource, having reduced the cost of communication system volume expansion.
Referring to Fig. 7, be the schematic flow sheet of the processing method of data in a kind of distributed base station of the present invention, the method comprises:
101, detect the transmission rate of the transmission initial data between BBU Base Band Unit and RRU long-distance radio frequency unit.
Concrete, distributed base station is the RRU(BaseBand Unit in traditional macro base station, Base Band Unit, be called for short BBU) and RRU(Remote Radio Unit, long-distance radio frequency unit, be called for short RRU) separation, adopt optical fiber or other transmission medium that the two is coupled together, between BBU and RRU, definition has unified interface standard simultaneously, as CPRI(Common Public Radio Interface, common public radio interface) standard and OBSAI(Open Base Station Architecture Initiative, Open Base Station Architecture alliance) standard.The transmission rate of the initial data of transmitting between BBU and RRU in monitoring modular 11 monitoring distributed base stations, unit Available Bit Rate or the baud rate of transmission rate represent, the data transmission rate of the initial data between the two can be determined by system bandwidth and sampling rate, for example, at a LTE(Long Term Evolution, Long Term Evolution plan, abbreviation LTE) in system, system bandwidth is 20MHz, quantizing bit wide is 16 bits, antenna number is 4, sector number is 3, in this LTE system, the transmission rate of the initial data between BBU and RRU is 11.8Gbps.
102, judge whether described transmission rate surpasses predetermined value.
Concrete, if be judged as YES, execution step 103, if NO, execution step 104.
103, described initial data is compressed to processing.
Concrete, the transmission rate of the initial data of transmitting between BBU and RRU is higher, requirement to the hardware handles ability of BBU and RRU will be higher, when the transmission rate of the initial data of transmitting between the two exceeds the disposal ability of BBU and RRU, can cause the loss of initial data, reduce the reliability of hardware device, by the preset value of a transmission rate is set, when the transmission rate of the initial data that compression module 12 obtains at judgement detection module 11 is greater than this preset value, this initial data is compressed to processing, reduce the processing expenditure of BBU and RRU equipment, prevent hardware device overload and cause loss of data.Compression is processed and can be adopted Dither algorithm to compress processing to initial data, also can adopt additive method.
104, do not compress, routinely flow operations.
By the monitoring to the transmission rate of the initial data of transmitting between BBU in distributed base station and RRU, when this transmission rate is greater than preset value, described initial data is compressed to processing, can effectively reduce the processing expenditure of BBU and RRU hardware device, avoid the deficiency of hardware device hardware handles ability and cause the loss of data, improve the reliability of communication system.Meanwhile, avoid the restriction of the communication line bandwidth between BBU and RRU and redeploy hardware resource, having reduced the cost of communication system volume expansion.
Referring to Fig. 8, be another schematic flow sheet of the processing method of data in a kind of distributed base station of the embodiment of the present invention, the method comprises:
201, detect the transmission rate of the initial data of the transmission between Base Band Unit and RRU long-distance radio frequency unit.
Concrete, the transmission rate of the initial data of transmitting between BBU and RRU in monitoring modular 11 monitoring distributed base stations, unit Available Bit Rate or the baud rate of transmission rate represent, the data transmission rate of the initial data between the two can and adopt speed to determine by system bandwidth, for example, at a LTE(Long Term Evolution, Long Term Evolution plan, abbreviation LTE) in system, system bandwidth is 20MHz, quantizing bit wide is 16 bits, antenna number is 4, sector number is 3, in this LTE system, the transmission rate of the initial data between BBU and RRU is 11.8Gbps.
202, judge whether described transmission rate surpasses preset value.
Concrete, compression module 12 judges whether described transmission rate surpasses preset value, if yes, and execution step 203, if NO, execution step 204.
203, obtain the required value of signal receiving quality of the receiving terminal of this initial data.
Concrete, distributed base station has up link and down link, in up link, RRU is sent to BBU by initial data, in down link, BBU is sent to RRU by primary signal, take up link as example, the receiving terminal of primary signal is BBU, and compression module 12 obtains the required value of the signal receiving quality of this BBU.Compression is processed and can be adopted Dither algorithm to compress processing to initial data, also can adopt additive method.
204, do not compress, according to old process, operate.
205, according to this required value, adjust the quantification bit wide of described initial data.
Concrete, the required value obtaining according to step 203, adjust the quantification bit wide of initial data to meet this required value, quantification bit wide after adjustment is less than fixing quantification bit wide, reduced the transmission rate of the initial data of BBU and RRU, detailed step please refer to the explanation of compression module, herein Ao Shu no longer.
By the monitoring to the transmission rate of the initial data of transmitting between BBU in distributed base station and RRU, when this transmission rate is greater than preset value, described initial data is compressed to processing, can effectively reduce the processing expenditure of BBU and RRU hardware device, avoid the deficiency of hardware device hardware handles ability and cause the loss of data, improve the reliability of communication system.Meanwhile, avoid the restriction of the communication line bandwidth between BBU and RRU and redeploy hardware resource, having reduced the cost of communication system volume expansion.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, one of ordinary skill in the art will appreciate that all or part of flow process that realizes above-described embodiment, and the equivalent variations of doing according to the claims in the present invention, still belong to the scope that invention is contained.