CN103139817A - Method and device for diagnosing base station channel faults - Google Patents
Method and device for diagnosing base station channel faults Download PDFInfo
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- CN103139817A CN103139817A CN2011103960413A CN201110396041A CN103139817A CN 103139817 A CN103139817 A CN 103139817A CN 2011103960413 A CN2011103960413 A CN 2011103960413A CN 201110396041 A CN201110396041 A CN 201110396041A CN 103139817 A CN103139817 A CN 103139817A
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Abstract
The invention discloses a method for diagnosing base station channel faults. The method comprises receiving base band signals sent by a base band unit (BBU), converting the base band signal into downgoing signals, and conducting power calculation on the downgoing signals to obtain downgoing signal power values; sending the downgoing signals, measuring sent signal power values of a sending channel, and calculating forward signal power values fed back by the downgoing signals to a detection channel; and conducting deviation calculation of the sent signal power values and the downgoing signal power values and deviation calculation of the forward signal power values and the downgoing signal power values, and judging if faults happen in the sending channel and the detection channel respectively according to the obtained difference values. The invention further provides a corresponding device. According to the method for diagnosing the base station channel faults, a link, where faults occur, of the base station channels can be judged when power detection is carried out, and therefore power detection abnormal reasons are determined, the power detection faults can be located simply, and work complexity of operation staff can be reduced.
Description
Technical field
The present invention relates to field of wireless communications systems, specially refer to a kind of method and device of diagnosing base station channel failure.
Background technology
At present, in the TDD wireless communication system, adopt the distributed base station that comprises RRU (Radio Remote Unit, Remote Radio Unit) and BBU (Base BandUnit, Base Band Unit).In base, the RRU array channel generally is divided into single channel or two kinds of configurations of multichannel, is respectively used to indoor covering and outdoor grand station.The RRU array channel comprises: the transceiver of high frequency or intermediate frequency, radio frequency amplifier spare (power amplifier and low noise amplifier etc.), feeder cable and outdoor unit.For the base station in actual motion, require power to each transmission channel emission can both carry out periodicity and detect, for use in the accuracy of monitor channel power output, thus performance and the wireless index of assurance base station.
Now the RRU array channel commonly used method of carrying out power detection has two kinds: a kind of is that downstream signal power take BBU is as detection power, and obtain the forward signal power of detected sense channel, downstream signal power and forward signal power are compared, judge whether sense channel breaks down; Another is to adopt in the spontaneous test data of Gp time slot, detect the data power of Gp time slot, and obtain the forward signal power of sense channel corresponding time slot, and the data power of forward signal power and Gp time slot is compared, judge whether sense channel breaks down.But, when the power that detects when the antenna opening of finding power detection is abnormal, can only measure the power output of RRU antenna opening with instrument, can not the link that go wrong of RRU transmission channel inside be positioned, at this moment, as not investigating the link that breaks down in power detection, determine the reason that power detection is abnormal, can make the location of power detection fault comparatively complicatedly, and increase operating personnel's the numerous and diverse degree of work.
Summary of the invention
Method and the device of main purpose of the present invention for a kind of diagnosing base station channel failure is provided, can judge the link that the base station passage breaks down when power detection, thereby determine the abnormal cause of power detection, make the location of power detection fault comparatively simply, and reduced operating personnel's the numerous and diverse degree of work.
The invention provides a kind of method of diagnosing base station channel failure, comprising:
Receive the baseband signal that Base Band Unit BBU sends, described baseband signal is converted to downstream signal, and described downstream signal is carried out power calculation, obtain the downstream signal performance number;
Described downstream signal is launched, measured the transmit signal power value of transmission channel, and calculate the forward signal performance number that described downstream signal feeds back to sense channel;
Described transmit signal power value and forward signal performance number are carried out difference calculating with described downstream signal performance number respectively, and judge respectively according to the difference that obtains whether described transmission channel and sense channel break down.
Preferably, described baseband signal is converted to downstream signal carrying out, and described downstream signal is carried out power calculation, after obtaining the downstream signal performance number, also comprise:
The base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information compared, to determine the accuracy of described downstream signal performance number.
Preferably, described downstream signal is launched, is measured the transmit signal power value of transmission channel, and calculate the forward signal performance number that described downstream signal feeds back to sense channel and comprise:
Described downstream signal is launched by transmission channel and exterior antenna mouth, and measured with instrument at described antenna opening place, obtain the transmit signal power value;
After control feeds back to sense channel through switch when described downstream signal, according to the parameter of the downstream signal of preserving, calculate the forward signal performance number.
Preferably, describedly transmit signal power value and forward signal performance number carried out difference with described downstream signal performance number respectively calculate, and judge respectively according to the difference that obtains whether described transmission channel and sense channel break down and specifically comprise:
Described transmit signal power value and described downstream signal performance number are carried out difference calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
Described forward signal performance number and described downstream signal performance number are carried out difference calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
Preferably, carry out described downstream signal is launched before, also comprise:
Select a passage as transmission channel in down going channel, and the time slot of the described downstream signal of selected emission.
The present invention also provides a kind of device of diagnosing base station channel failure, comprising:
Receiver module is used for receiving the baseband signal that Base Band Unit BBU sends, and described baseband signal is converted to downstream signal, and described downstream signal is carried out power calculation, obtains the downstream signal performance number;
Transmitter module is used for described downstream signal is launched, and measures the transmit signal power value of transmission channel, and calculates the forward signal performance number that described downstream signal feeds back to sense channel;
Judge module is used for described transmit signal power value and forward signal performance number are carried out difference calculating with described downstream signal performance number respectively, and judges respectively according to the difference that obtains whether described transmission channel and sense channel break down.
Preferably, the device of diagnosing base station channel failure also comprises:
Comparison module is used for the base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information compared, to determine the accuracy of described downstream signal performance number.
Preferably, described transmitter module comprises:
Measuring unit is used for described downstream signal is launched by transmission channel and exterior antenna mouth, and measures with instrument at described antenna opening place, obtains the transmit signal power value;
Computing unit is used for according to the parameter of the downstream signal of preserving, calculating the forward signal performance number after the control of described downstream signal process switch feeds back to sense channel.
Preferably, described judge module comprises:
First contrasts the unit, be used for that described transmit signal power value and described downstream signal performance number are carried out difference and calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
Second contrasts the unit, be used for that described forward signal performance number and described downstream signal performance number are carried out difference and calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
Preferably, the device of diagnosing base station channel failure also comprises:
Select module, be used for selecting a passage as transmission channel at down going channel, and the time slot of the described downstream signal of selected emission.
The present invention is converted to the downstream signal of RRU normal operation by the baseband signal that Base Band Unit BBU is sent, and with this downstream signal as detection signal, detect the power of this detection signal in transmission channel and sense channel, carry out the diagnosis of RRU channel failure with this.At first, the downstream signal performance number of downstream signal is calculated, then downstream signal is launched by the down going channel of RRU, and obtain transmit signal power value and forward signal performance number by measurement and calculation.Obtain respectively transmission channel actual gain and sense channel actual gain by transmit signal power value and forward signal performance number, and compare to judge with the nominal gain of RRU passage whether the deviation of passage actual gain and passage nominal gain surpasses default threshold value respectively, thereby can judge whether transmission channel or sense channel break down.Adopt this method, can judge the link that the base station passage breaks down when power detection, thereby determine the abnormal cause of power detection, make the location of power detection fault comparatively simply, and reduced operating personnel's the numerous and diverse degree of work.
Description of drawings
Fig. 1 is the schematic flow sheet of method one embodiment of diagnosing base station channel failure of the present invention;
Fig. 2 is the schematic flow sheet of launching in Fig. 1;
Fig. 3 is the schematic flow sheet that judges in Fig. 1;
Fig. 4 is the schematic flow sheet of the another embodiment of method of diagnosing base station channel failure of the present invention;
Fig. 5 is the method schematic flow sheet of an embodiment again of diagnosing base station channel failure of the present invention;
Fig. 6 is the structural representation of device one embodiment of diagnosing base station channel failure of the present invention;
Fig. 7 is the structural representation of transmitter module in Fig. 6;
Fig. 8 is the structural representation of judge module in Fig. 6;
Fig. 9 is the structural representation of the another embodiment of device of diagnosing base station channel failure of the present invention;
Figure 10 is the device structural representation of an embodiment again of diagnosing base station channel failure of the present invention.
The realization of the object of the invention, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The invention provides a kind of method of diagnosing base station channel failure.In distributed base station system, Base Band Unit BBU is connected with radio frequency remote unit RRU, the baseband signal that RRU reception BBU sends and the downstream signal that is converted to normal operation, and with this downstream signal as detection signal, by detecting the power of this detection signal in transmission channel and sense channel, carry out the diagnosis of RRU channel failure.The RRU passage that provides comprises control board, passage transceiver, power output sense channel, power amplifier and filter.Control the functions such as conversion, base band-intermediate frequency conversion (comprising up-conversion and frequency down-converts) and the calibration of power of optical fiber and data by control board; Carry out the transmission of downstream signal by sender, make downstream signal pass through transmission channel, and through power amplifier and filter process, gone out by the exterior antenna port transmission at last; Receiver is used for receiving the downstream signal that feeds back by the power output sense channel.
With reference to Fig. 1, method one embodiment of diagnosing base station channel failure of the present invention is proposed, the method comprises:
Step S101 receives the baseband signal that Base Band Unit BBU sends, and described baseband signal is converted to downstream signal, and described downstream signal is carried out power calculation, obtains the downstream signal performance number;
When distributed base station moved in commercial network, Base Band Unit BBU was connected with radio frequency remote unit RRU, and BBU sends to RRU with baseband signal, and the RRU side is converted to this baseband signal the downstream signal of normal operation, and this downstream signal is transferred to user side.In the present embodiment, can adopt downstream signal as detection signal, to carry out the failure diagnosis of RRU passage.After receiving the baseband signal that BBU sends, need to be with it through frequency up-converted, namely be converted to downstream signal, then, data when grasping a certain time slot in this downstream signal, and calculate according to these data, just can obtain the downstream signal performance number of downstream signal, this downstream signal performance number can be designated as P_IQ_BB_Tx[n].
Step S102 launches described downstream signal, measures the transmit signal power value of transmission channel, and calculates the forward signal performance number that described downstream signal feeds back to sense channel;
When RRU is converted to downstream signal with the baseband signal that the BBU that receives sends, and through after having calculated the downstream signal performance number of this downstream signal, just can utilize the sender in the RRU down going channel that received downstream signal is launched, and downstream signal is gone out by the exterior antenna port transmission, at this moment, power output in the time of need to exporting transmission channel to this downstream signal is measured, and the performance number that measures just is the transmit signal power value.Simultaneously, after descending signal transfers to filter, can control this downstream signal by switch and feed back to sense channel, and downstream signal is converted to digital signal, by control board, this digital signal is received and calculate its corresponding power detection value, this power detection value is downstream signal through the forward signal performance number of sense channel.
Step S103 carries out difference calculating with described downstream signal performance number respectively with described transmit signal power value and forward signal performance number, and judges respectively according to the difference that obtains whether described transmission channel and sense channel break down.
When obtain transmit signal power value and forward signal performance number by measurements and calculations after, transmit signal power value and forward signal performance number are subtracted each other with the downstream signal performance number respectively, just can obtain respectively a difference, this difference is the actual gain of passage, i.e. transmission channel actual gain and sense channel actual gain.The calibrating parameters that production writes according to the RRU passage calculates, can obtain RRU passage nominal gain, then, passage actual gain and passage nominal gain are compared, at this moment, need default threshold value, when the difference of transmission channel actual gain or sense channel actual gain and passage nominal gain during over this threshold value, just can judge transmission channel or fault has appearred in sense channel.
The embodiment of the present invention, be converted to the downstream signal of RRU normal operation by the baseband signal that Base Band Unit BBU is sent, and with this downstream signal as detection signal, detect the power of this detection signal in transmission channel and sense channel, carry out the diagnosis of RRU channel failure with this.At first, the downstream signal performance number of downstream signal is calculated, then downstream signal is launched by the down going channel of RRU, and obtain transmit signal power value and forward signal performance number by measurement and calculation.Obtain respectively transmission channel actual gain and sense channel actual gain by transmit signal power value and forward signal performance number, and compare to judge with RRU passage nominal gain whether transmission channel or sense channel break down respectively.Adopt this method, can judge the link that the base station passage breaks down when power detection, thereby determine the abnormal cause of power detection, make the location of power detection fault comparatively simply, and reduced operating personnel's the numerous and diverse degree of work.
With reference to Fig. 2, in method one embodiment of diagnosing base station channel failure of the present invention, step S102 further comprises:
Step S1021 launches described downstream signal by transmission channel and exterior antenna mouth, and measures with instrument at described antenna opening place, obtains the transmit signal power value;
After baseband signal that RRU sends received BBU is converted to downstream signal, this downstream signal is used for the normal operation of RRU, then, downstream signal is launched by down going channel, the passage that is used for the emission downstream signal this moment is just transmission channel, downstream signal is finally launched by the exterior antenna mouth through power amplifier and filter process in transmission channel.At this moment, need to measure the power output of downstream signal in antenna opening, can adopt power measurement instrumentation to measure, the performance number that measures is the transmit signal power value, this transmit signal power value can be designated as P_Ant_Pwr[n].
Step S1022 after control feeds back to sense channel through switch when described downstream signal, according to the parameter of the downstream signal of preserving, calculates the forward signal performance number.
When descending signal transfers to filter in transmission channel, can control downstream signal by the control switch that is connected with filter, even it feeds back to sense channel, by the receiver in sense channel, downstream signal is received, then downstream signal is carried out mixing, analog-to-digital conversion and frequency down-converts, downstream signal can be converted to digital signal.By control board, this digital signal is received, and data cached according to the baseband signal of preserving, the corresponding performance number of this digital signal is calculated, at this moment, resulting performance number is the forward signal performance number after downstream signal feeds back by sense channel, this forward signal performance number can be designated as P_IQ_Det_Tx[n].
downstream signal is carried out respectively measurements and calculations in power output and its detection power by sense channel of transmission channel, namely measure the transmit signal power value by instrument in antenna opening, and its corresponding forward signal performance number of the data cached calculating of the baseband signal of passing through to preserve, when needs carry out power detection to RRU, just can be by transmit signal power value and forward signal performance number, detect accordingly respectively, occur when abnormal when transmit signal power value or forward signal performance number being detected, just can judge that corresponding transmission channel or sense channel break down.Like this, just can further guarantee the judgement of the link that when power detection, the base station passage broken down, and further reduce operating personnel's the numerous and diverse degree of work.
In RRU, might exist a plurality of down going channels to share the situation of a sense channel, as in 8 passage RRU, normally front 4 passages share same sense channel, and rear 4 passages share a sense channel.In this case, due to after the RRU complete machine finishes open-loop calibration, identical descending target gain is all adjusted in the gain of passage, like this, when public sense channel breaks down, whether the forward signal power of 4 down going channels of detected correspondence will be forbidden, just can judge sense channel according to the forward signal power of 4 down going channels and break down.When the allocating power of 4 down going channels is identical, the forward signal power of each down going channel is also basic identical, if the forward signal power deviation of the forward power of one of them down going channel and other three passages is excessive, just can break down by this down going channel of primitive decision.
With reference to Fig. 3, in method one embodiment of diagnosing base station channel failure of the present invention, step S103 further comprises:
Step S1031, described transmit signal power value and described downstream signal performance number are carried out difference calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
When transmit signal power value P_Ant_Pwr[n detected by the power detection instrument in antenna opening] after, just can calculate the transmission channel actual gain, the transmission channel actual gain can be designated as G_Tx[n], the method of calculating is for to subtract each other transmit signal power value and downstream signal performance number, namely by following formula: G_Tx[n]=P_Ant_Pwr[n]-P_IQ_BB_Tx[n].When obtain transmission channel actual gain G_Tx[n by formula] after, just to calculate according to the calibrating parameters that the production of RRU passage writes this passage nominal gain, then with G_Tx[n] compare with the passage nominal gain, judge G_Tx[n] whether surpass default threshold value with the difference of passage nominal gain, as surpass, can judge that transmission channel breaks down.
Step S1032, described forward signal performance number and described downstream signal performance number are carried out difference calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
As the data cached forward signal performance number P_IQ_Det_Tx[n that calculates according to the baseband signal of preserving] after, just can calculate the sense channel actual gain, the sense channel actual gain can be designated as G_Det_Tx[n], the method of calculating is for to subtract each other downstream signal performance number and forward signal performance number, namely by following formula: G_Det_Tx[n]=P_IQ_Det_Tx[n]-P_Ant_Pwr[n].When obtain sense channel actual gain G_Det_Tx[n by formula] after, with G_Det_Tx[n] compare with the passage nominal gain, judge G_Det_Tx[n] whether surpass default threshold value, as surpass with the difference of passage nominal gain, can judge that sense channel breaks down.
To and carry out difference with the downstream signal performance number respectively by the forward signal performance number that calculates and calculate by the transmit signal power value that measures, thereby obtain transmission channel actual gain and sense channel actual gain, the passage nominal gain that then will calculate according to the calibrating parameters that the production of RRU passage writes compares with the passage actual gain that obtains, judge whether the difference between passage nominal gain and passage actual gain exceeds default threshold value, thereby just can judge transmission channel or fault has appearred in sense channel.Like this, just further make the location of power detection fault comparatively simply, and can determine easily the abnormal cause of power detection.
With reference to Fig. 4, the another embodiment of method of diagnosing base station channel failure of the present invention is proposed, the method also comprises:
Step S104 compares the base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information, to determine the accuracy of described downstream signal performance number.
When RRU is converted to downstream signal with the baseband signal that the BBU that receives sends, and during according to a certain time slot that grasps the data in downstream signal calculate obtain downstream signal performance number P_IQ_BB_Tx[n] after, configuration information according to the residential quarter, calculate the base band power value of the baseband signal of BBU transmission, and downstream signal performance number and this base band power value are compared, whether consistent with the base band power value to judge the downstream signal performance number.As unanimously, illustrate that the downstream signal performance number that obtains according to downstream signal is accurately, this downstream signal can be launched; As inconsistent, under normal conditions, also can only illustrate the downstream signal performance number differently with the computational methods of base band power value, can not judge that the downstream signal performance number is inaccurate with this, that is to say, downstream signal can be launched equally.
To carry out that downstream signal that frequency up-converted obtains carries out power calculation and after obtaining the downstream signal performance number through RRU, the base band power value of the baseband signal that this downstream signal performance number and the BBU that calculates according to the configuration information of residential quarter are sent compares, whether accurate to determine the downstream signal performance number, as accurately, downstream signal is launched.Like this, to a great extent, can guarantee the power output of resulting downstream signal and the accuracy of detection power, thereby make having higher success rate the detection of channel failure.
With reference to Fig. 5, the method that proposes diagnosing base station channel failure of the present invention is an embodiment again, and the method also comprises:
Step S105 selects a passage as transmission channel in down going channel, and the time slot of the described downstream signal of selected emission.
When RRU is converted to downstream signal with the baseband signal that BBU sends, and need to this downstream signal be launched by down going channel the time, can select a passage as transmission channel in the down going channel of RRU.Simultaneously, also need the time slot of selected emission downstream signal, in the present embodiment, can select RRU main carrier TSO time slot or descending pilot frequency time slot DWPTS, at other lower industry bar time slots, because business is uncertain, and power stage is non-constant, therefore, is not suitable as the time slot of power detection.
Select a down going channel as the transmission channel of downstream signal in the down going channel of RRU, and downstream signal is launched; Simultaneously, selected RRU main carrier TSO time slot or descending pilot frequency time slot DWPTS are the time slot of emission downstream signal.Can make more clearly to the power detection of downstream signal, simple, and because the downstream signal power output of selected time slot is comparatively stable, further guarantee detection signal is carried out the accuracy of power detection.
With reference to Fig. 6, device one embodiment of diagnosing base station channel failure of the present invention is proposed, this device comprises:
When distributed base station moved in commercial network, Base Band Unit BBU was connected with radio frequency remote unit RRU, and BBU sends to RRU with baseband signal, and the RRU side is converted to this baseband signal the downstream signal of normal operation, and this downstream signal is transferred to user side.In the present embodiment, can adopt downstream signal as detection signal, to carry out the failure diagnosis of RRU passage.After receiver module 10 receives the baseband signal that BBU sends, need to be with it through frequency up-converted, namely be converted to downstream signal, then, data when grasping a certain time slot in this downstream signal, and calculate according to these data, just can obtain the downstream signal performance number of downstream signal, this downstream signal performance number can be designated as P_IQ_BB_Tx[n].
When RRU is converted to downstream signal with the baseband signal that the BBU that receives sends, and through after having calculated the downstream signal performance number of this downstream signal, transmitter module 20 just can utilize the sender in the RRU down going channel that received downstream signal is launched, and downstream signal is gone out by the exterior antenna port transmission, at this moment, power output in the time of need to exporting transmission channel to this downstream signal is measured, and the performance number that measures just is the transmit signal power value.Simultaneously, after descending signal transfers to filter, can control this downstream signal by switch and feed back to sense channel, and downstream signal is converted to digital signal, by control board, this digital signal is received and calculate its corresponding power detection value, this power detection value is downstream signal through the forward signal performance number of sense channel.
When obtain transmit signal power value and forward signal performance number by measurements and calculations after, transmit signal power value and forward signal performance number are subtracted each other with the downstream signal performance number respectively, just can obtain respectively a difference, this difference is the actual gain of passage, i.e. transmission channel actual gain and sense channel actual gain.The calibrating parameters that production writes according to the RRU passage calculates, can obtain RRU passage nominal gain, then, judge module 30 compares passage actual gain and passage nominal gain, at this moment, need default threshold value, when the difference of transmission channel actual gain or sense channel actual gain and passage nominal gain during over this threshold value, just can judge transmission channel or fault has appearred in sense channel.
The embodiment of the present invention, be converted to the downstream signal of RRU normal operation by the baseband signal that Base Band Unit BBU is sent, and with this downstream signal as detection signal, detect the power of this detection signal in transmission channel and sense channel, carry out the diagnosis of RRU channel failure with this.At first, the downstream signal performance number of downstream signal is calculated, then downstream signal is launched by the down going channel of RRU, and obtain transmit signal power value and forward signal performance number by measurement and calculation.Obtain respectively transmission channel actual gain and sense channel actual gain by transmit signal power value and forward signal performance number, and compare to judge with RRU passage nominal gain whether transmission channel or sense channel break down respectively.Adopt this method, can judge the link that the base station passage breaks down when power detection, thereby determine the abnormal cause of power detection, make the location of power detection fault comparatively simply, and reduced operating personnel's the numerous and diverse degree of work.
With reference to Fig. 7, in device one embodiment of diagnosing base station channel failure of the present invention, transmitter module 20 further comprises:
Measuring unit 21 is used for described downstream signal is launched by transmission channel and exterior antenna mouth, and measures with instrument at described antenna opening place, obtains the transmit signal power value;
After baseband signal that RRU sends received BBU is converted to downstream signal, this downstream signal is used for the normal operation of RRU, then, downstream signal is launched by down going channel, the passage that is used for the emission downstream signal this moment is just transmission channel, downstream signal is finally launched by the exterior antenna mouth through power amplifier and filter process in transmission channel.At this moment, measuring unit 21 need to be measured the power output of downstream signal in antenna opening, can adopt power measurement instrumentation to measure, and the performance number that measures is the transmit signal power value, this transmit signal power value can be designated as P_Ant_Pwr[n].
When descending signal transfers to filter in transmission channel, can control downstream signal by the control switch that is connected with filter, even it feeds back to sense channel, by the receiver in sense channel, downstream signal is received, then downstream signal is carried out mixing, analog-to-digital conversion and frequency down-converts, downstream signal can be converted to digital signal.By control board, this digital signal is received, and computing unit 22 is data cached according to the baseband signal of preserving, the corresponding performance number of this digital signal is calculated, at this moment, resulting performance number is the forward signal performance number after downstream signal feeds back by sense channel, this forward signal performance number can be designated as P_IQ_Det_Tx[n].
downstream signal is carried out respectively measurements and calculations in power output and its detection power by sense channel of transmission channel, namely measure the transmit signal power value by instrument in antenna opening, and its corresponding forward signal performance number of the data cached calculating of the baseband signal of passing through to preserve, when needs carry out power detection to RRU, just can be by transmit signal power value and forward signal performance number, detect accordingly respectively, occur when abnormal when transmit signal power value or forward signal performance number being detected, just can judge that corresponding transmission channel or sense channel break down.Like this, just can further guarantee the judgement of the link that when power detection, the base station passage broken down, and further reduce operating personnel's the numerous and diverse degree of work.
In RRU, might exist a plurality of down going channels to share the situation of a sense channel, as in 8 passage RRU, normally front 4 passages share same sense channel, and rear 4 passages share a sense channel.In this case, due to after the RRU complete machine finishes open-loop calibration, identical descending target gain is all adjusted in the gain of passage, like this, when public sense channel breaks down, whether the forward signal power of 4 down going channels of detected correspondence will be forbidden, just can judge sense channel according to the forward signal power of 4 down going channels and break down.When the allocating power of 4 down going channels is identical, the forward signal power of each down going channel is also basic identical, if the forward signal power deviation of the forward power of one of them down going channel and other three passages is excessive, just can break down by this down going channel of primitive decision.
With reference to Fig. 8, in device one embodiment of diagnosing base station channel failure of the present invention, judge module 30 comprises:
First contrasts unit 31, be used for that described transmit signal power value and described downstream signal performance number are carried out difference and calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
Second contrasts unit 32, be used for that described forward signal performance number and described downstream signal performance number are carried out difference and calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
When transmit signal power value P_Ant_Pwr[n detected by the power detection instrument in antenna opening] after, just can calculate the transmission channel actual gain, the transmission channel actual gain can be designated as G_Tx[n], the method of calculating is for to subtract each other transmit signal power value and downstream signal performance number, namely by following formula: G_Tx[n]=P_Ant_Pwr[n]-P_IQ_BB_Tx[n].When obtain transmission channel actual gain G_Tx[n by formula] after, just to calculate according to the calibrating parameters that the production of RRU passage writes this passage nominal gain, then first contrast unit 31 with G_Tx[n] compare with the passage nominal gain, judge G_Tx[n] whether surpass default threshold value with the difference of passage nominal gain, as surpass, can judge that transmission channel breaks down.
As the data cached forward signal performance number P_IQ_Det_Tx[n that calculates according to the baseband signal of preserving] after, just can calculate the sense channel actual gain, the sense channel actual gain can be designated as G_Det_Tx[n], the method of calculating is for to subtract each other downstream signal performance number and forward signal performance number, namely by following formula: G_Det_Tx[n]=P_IQ_Det_Tx[n]-P_Ant_Pwr[n].When obtain sense channel actual gain G_Det_Tx[n by formula] after, second contrasts unit 32 with G_Det_Tx[n] compare with the passage nominal gain, judge G_Det_Tx[n] whether surpass default threshold value with the difference of passage nominal gain, as surpass, can judge that sense channel breaks down.
To and carry out difference with the downstream signal performance number respectively by the forward signal performance number that calculates and calculate by the transmit signal power value that measures, thereby obtain transmission channel actual gain and sense channel actual gain, the passage nominal gain that then will calculate according to the calibrating parameters that the production of RRU passage writes compares with the passage actual gain that obtains, judge whether the difference between passage nominal gain and passage actual gain exceeds default threshold value, thereby just can judge transmission channel or fault has appearred in sense channel.Like this, just further make the location of power detection fault comparatively simply, and can determine easily the abnormal cause of power detection.
With reference to Fig. 9, the another embodiment of device of diagnosing base station channel failure of the present invention is proposed, this device also comprises:
Comparison module 40 is used for the base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information compared, to determine the accuracy of described downstream signal performance number.
When RRU is converted to downstream signal with the baseband signal that the BBU that receives sends, and during according to a certain time slot that grasps the data in downstream signal calculate obtain downstream signal performance number P_IQ_BB_Tx[n] after, configuration information according to the residential quarter, calculate the base band power value of the baseband signal of BBU transmission, whether comparison module 40 compares downstream signal performance number and this base band power value, consistent with the base band power value to judge the downstream signal performance number.As unanimously, illustrate that the downstream signal performance number that obtains according to downstream signal is accurately, this downstream signal can be launched; As inconsistent, under normal conditions, also can only illustrate the downstream signal performance number differently with the computational methods of base band power value, can not judge that the downstream signal performance number is inaccurate with this, that is to say, downstream signal can be launched equally.
To carry out that downstream signal that frequency up-converted obtains carries out power calculation and after obtaining the downstream signal performance number through RRU, the base band power value of the baseband signal that this downstream signal performance number and the BBU that calculates according to the configuration information of residential quarter are sent compares, whether accurate to determine the downstream signal performance number, as accurately, downstream signal is launched.Like this, to a great extent, can guarantee the power output of resulting downstream signal and the accuracy of detection power, thereby make having higher success rate the detection of channel failure.
With reference to Figure 10, the another embodiment of device of diagnosing base station channel failure of the present invention is proposed, this device also comprises:
When RRU is converted to downstream signal with the baseband signal that BBU sends, and need to this downstream signal be launched by down going channel the time, select module 50 to select a passage as transmission channel in the down going channel of RRU.Simultaneously, also need the time slot of selected emission downstream signal, in the present embodiment, can select RRU main carrier TSO time slot or descending pilot frequency time slot DWPTS, at other lower industry bar time slots, because business is uncertain, and power stage is non-constant, therefore, is not suitable as the time slot of power detection.
Select a down going channel as the transmission channel of downstream signal in the down going channel of RRU, and downstream signal is launched; Simultaneously, selected RRU main carrier TSO time slot or descending pilot frequency time slot DWPTS are the time slot of emission downstream signal.Can make more clearly to the power detection of downstream signal, simple, and because the downstream signal power output of selected time slot is comparatively stable, further guarantee detection signal is carried out the accuracy of power detection.
The above is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (10)
1. the method for a diagnosing base station channel failure, is characterized in that, comprising:
Receive the baseband signal that Base Band Unit BBU sends, described baseband signal is converted to downstream signal, and described downstream signal is carried out power calculation, obtain the downstream signal performance number;
Described downstream signal is launched, measured the transmit signal power value of transmission channel, and calculate the forward signal performance number that described downstream signal feeds back to sense channel;
Described transmit signal power value and forward signal performance number are carried out difference calculating with described downstream signal performance number respectively, and judge respectively according to the difference that obtains whether described transmission channel and sense channel break down.
2. the method for claim 1, is characterized in that, described baseband signal is converted to downstream signal carrying out, and described downstream signal is carried out power calculation, after obtaining the downstream signal performance number, also comprises:
The base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information compared, to determine the accuracy of described downstream signal performance number.
3. method as claimed in claim 1 or 2, is characterized in that, described downstream signal launched, and measures the transmit signal power value of transmission channel, and calculate the forward signal performance number that described downstream signal feeds back to sense channel and comprise:
Described downstream signal is launched by transmission channel and exterior antenna mouth, and measured with instrument at described antenna opening place, obtain the transmit signal power value;
After control feeds back to sense channel through switch when described downstream signal, according to the parameter of the downstream signal of preserving, calculate the forward signal performance number.
4. method as claimed in claim 3, it is characterized in that, describedly transmit signal power value and forward signal performance number carried out difference with described downstream signal performance number respectively calculate, and judge respectively according to the difference that obtains whether described transmission channel and sense channel break down and specifically comprise:
Described transmit signal power value and described downstream signal performance number are carried out difference calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
Described forward signal performance number and described downstream signal performance number are carried out difference calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
5. the method for claim 1, is characterized in that, carry out described downstream signal is launched before, also comprise:
Select a passage as transmission channel in down going channel, and the time slot of the described downstream signal of selected emission.
6. the device of a diagnosing base station channel failure, is characterized in that, comprising:
Receiver module is used for receiving the baseband signal that Base Band Unit BBU sends, and described baseband signal is converted to downstream signal, and described downstream signal is carried out power calculation, obtains the downstream signal performance number;
Transmitter module is used for described downstream signal is launched, and measures the transmit signal power value of transmission channel, and calculates the forward signal performance number that described downstream signal feeds back to sense channel;
Judge module is used for described transmit signal power value and forward signal performance number are carried out difference calculating with described downstream signal performance number respectively, and judges respectively according to the difference that obtains whether described transmission channel and sense channel break down.
7. device as claimed in claim 6, is characterized in that, also comprises:
Comparison module is used for the base band power value of described downstream signal performance number with the baseband signal of the BBU transmission that calculates according to community configured information compared, to determine the accuracy of described downstream signal performance number.
8. device as described in claim 6 or 7, is characterized in that, described transmitter module comprises:
Measuring unit is used for described downstream signal is launched by transmission channel and exterior antenna mouth, and measures with instrument at described antenna opening place, obtains the transmit signal power value;
Computing unit is used for according to the parameter of the downstream signal of preserving, calculating the forward signal performance number after the control of described downstream signal process switch feeds back to sense channel.
9. device as claimed in claim 8, is characterized in that, described judge module comprises:
First contrasts the unit, be used for that described transmit signal power value and described downstream signal performance number are carried out difference and calculate the transmission channel actual gain, and described transmission channel actual gain and the transmission channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge transmission channel;
Second contrasts the unit, be used for that described forward signal performance number and described downstream signal performance number are carried out difference and calculate the sense channel actual gain, and described sense channel actual gain and the sense channel nominal gain that calculates according to calibrating parameters are compared, whether break down to judge sense channel.
10. device as claimed in claim 6, is characterized in that, also comprises:
Select module, be used for selecting a passage as transmission channel at down going channel, and the time slot of the described downstream signal of selected emission.
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