CN103227683A - Method and device for jointly detecting RRU (remote radio unit) fault - Google Patents
Method and device for jointly detecting RRU (remote radio unit) fault Download PDFInfo
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Abstract
The invention provides a method for jointly detecting an RRU fault. The method comprises steps as follows: a plurality of detection items are arranged to detect the RRU fault; a corresponding weighted value is endowed to a node referred by each detection item according to a detection result of the detection item; the weighted values of the nodes are summed, so that a weighted result of each node is obtained; and the node with the highest weighted result is located to be a fault node. The invention further provides a device for jointly detecting the RRU fault. With the application of the method and the device for jointly detecting the RRU fault, the accuracy of RRU fault positioning can be improved.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly a kind of method and device that the RRU fault is carried out joint-detection.
Background technology
In the Remote Radio Unit (RRU) of base station, because the function complexity, and the outfield operational environment is comparatively complicated, breaks down than being easier to; In a single day and break down, because the complexity of its operational environment is safeguarded and the on-the-spot relatively difficulty of locating also.
The generally existing fault warning functions of existing RRU, but concrete alarm is made prompting at the local fault phenomenon that shows often, can't accurately be mapped to the root of fault because of the source.
Fig. 1 is a RRU system architecture schematic diagram.Among Fig. 1:
CPU is responsible for RRU is controlled the function of handling with partial data;
The digital intermediate frequency system finishes the processing of intermediate frequency data passage;
Down link is used to finish the conversion of signal from the digital intermediate frequency to the analog intermediate frequency and even conversion, amplification, filtering, the gain controlling of radio frequency; Down link specifically comprises with lower module: digital to analog converter (DAC), rf modulations are amplified link, preset gain control (PGC) and power amplification (PA);
Up link is used to finish radiofrequency signal amplification, filtering, is converted to intermediate frequency and analog-to-digital conversion; Up link specifically comprises with lower module: low noise amplifier (LNA), PGC, rf modulations are amplified link and analog to digital converter (ADC);
Based on feedback link is used to finish the detection of down link.
Present RRU warning system generally judges whether exist in the link unusually by the output result who detects dotted portion among Fig. 1.For example: detect the output result of PA in the down link, detect the output result of modulation coupling in the based on feedback link, and the output result of ADC in the up link.As seen, whether existing RRU warning system can only exist unusually by the whole link of normally whether judging that detects the terminal signal of link, and can't make judgement unusually for link source or intermediate node.
Just because of above-mentioned reason, make the outfield fault accurately to locate, thereby may cause erroneous judgement, cause economic loss.
Summary of the invention
The invention provides and a kind of the RRU fault is carried out the method and the device of joint-detection, to improve the accuracy of RRU fault location.
Provided by the inventionly a kind of Remote Radio Unit (RRU) fault is carried out the method for joint-detection, comprising:
N test item is set RRU is carried out fault detect; N is greater than 2;
Testing result according to each test item is given corresponding weighted value to the related node of this test item;
Respectively the weighted value of each node is added up and obtain the weighted results of each node;
The node locating that weighted results is the highest is a malfunctioning node.
Preferably, described test item comprises with the next item down or multinomial combination in any:
Output result to down link intermediate power amplifier (PA) detects;
Based on feedback link is carried out fault detect;
Output result to analog to digital converter in the up link (ADC) detects;
Element in the down link is carried out fault detect;
Element in the up link is carried out fault detect;
Carry out fault detect to amplify link from the rf modulations of down link through the loop circuit of coupling disc and up link arrival digital intermediate frequency system;
The loop circuit that amplifies link through the rf modulations of down link and coupling disc arrival up link from the digital intermediate frequency system is carried out fault detect;
Standing-wave ratio (VSWR) detects;
Be with outer VSWR to detect.
Preferably, the element in the down link comprises: digital to analog converter (DAC), rf modulations are amplified link or preset gain control (PGC);
Element in the up link comprises: ADC, rf modulations are amplified link or PGC.
Preferably, the mode of element being carried out fault detect is: keep the gain of other elements among the RRU constant, adjust the gain of described element, and to adjusting the output result of based on feedback link compares before and after the gain, if the result of contrast is normal, then the testing result of this test item is normal, otherwise the testing result of this test item is unusual.
Preferably, at each test item,, this node is changed to 0 corresponding to the weighted value of described test item for the node that can't confirm whether to exist fault according to the testing result of this test item; For the node of confirming to exist fault according to the testing result of this test item, this node is changed to a positive number corresponding to the weighted value of described test item; For the node of confirming not exist fault according to the testing result of this test item, this node is changed to a negative corresponding to the weighted value of described test item.
Provided by the inventionly a kind of Remote Radio Unit (RRU) fault is carried out the device of joint-detection, comprising:
Detection module is used for according to N test item setting in advance RRU being carried out fault detect and obtains testing result corresponding to each test item; N is greater than 2;
Weighting block is used for giving corresponding weighted value according to the testing result of each test item to the related node of this test item;
The fault location module is used for respectively weighted value with each node and adds up and obtain the weighted results of each node, and the node locating that weighted results is the highest is a malfunctioning node.
Preferably, described detection module is used for of following test item or multinomial combination in any are detected:
Output result to down link intermediate power amplifier (PA) detects;
Based on feedback link is carried out fault detect;
Output result to analog to digital converter in the up link (ADC) detects;
Element in the down link is carried out fault detect;
Element in the up link is carried out fault detect;
Carry out fault detect to amplify link from the rf modulations of down link through the loop circuit of coupling disc and up link arrival digital intermediate frequency system;
The loop circuit that amplifies link through the rf modulations of down link and coupling disc arrival up link from the digital intermediate frequency system is carried out fault detect;
Standing-wave ratio (VSWR) detects;
Be with outer VSWR to detect.
Preferably, when the element in the down link was carried out fault detect, fault detect was carried out in digital to analog converter (DAC), rf modulations amplification link or preset gain control (PGC) that detection module is used for down link;
When the element in the up link was carried out fault detect, ADC, rf modulations amplification link or PGC that detection module is used for down link carried out fault detect.
Preferably, when element is carried out fault detect, described detection module keeps the gain of other elements among the RRU constant, adjust the gain of described element, and to adjusting the output result of based on feedback link compares before and after the gain, be under the normal situation in the result of contrast, the testing result of judging this test item is for normally, otherwise the testing result of judging this test item is for unusual.
Preferably, at each test item, for the node that can't confirm whether to exist fault according to the testing result of this test item, described weighting block is changed to 0 with this node corresponding to the weighted value of described test item; For the node of confirming to exist fault according to the testing result of this test item, described weighting block is changed to a positive number with this node corresponding to the weighted value of described test item; For the node of confirming not exist fault according to the testing result of this test item, described weighting block is changed to a negative with this node corresponding to the weighted value of described test item.
As seen from the above technical solution, method and the device that the RRU fault is carried out joint-detection provided by the invention, by a plurality of test items are set RRU is carried out fault detect, and give corresponding weighted value to the related node of this test item according to the testing result of each test item, respectively the weighted value of each node is added up at last and obtain the weighted results of each node, the node locating that weighted results is the highest is a malfunctioning node.Thereby, realized the RRU fault location by joint-detection, and made that source of trouble location is more accurate a plurality of test items, can reduce the probability of by mistake giving an encore.
Description of drawings
Fig. 1 is a RRU system architecture schematic diagram;
Fig. 2 is for carrying out the system schematic of joint-detection to the RRU fault in a preferred embodiment of the present invention;
Fig. 3 is a VSWR test schematic diagram in a preferred embodiment of the present invention;
Fig. 4 is the present invention's one preferable composition structural representation that the RRU fault is carried out the device of joint-detection.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
Main thought of the present invention is: a plurality of test items are set RRU is carried out fault detect, and give corresponding weighted value to the related node of this test item according to the testing result of each test item, respectively the weighted value of each node is added up at last and obtain the weighted results of each node, the node locating that weighted results is the highest is a malfunctioning node.So, realized the RRU fault location by joint-detection to a plurality of test items.
Based on above-mentioned main thought, need be on existing RRU fault detect project foundation, more newly-increased test items are to realize the complete detection to the RRU fault.Describe below by a preferred embodiment.
Fig. 2 is for carrying out the system schematic of joint-detection to the RRU fault in a preferred embodiment of the present invention.Referring to Fig. 2, newly-increased on the basis of existing technology six of the present invention investigates point and two loopback detection routes, and increase VSWR (standing-wave ratio) detects and the outer VSWR of band detects (as shown in Figure 3).Specifically comprise:
Down link is increased by three investigate point: DAC, rf modulations amplification link and PGC, as the node of A among Fig. 2～C indication;
Up link is increased by three investigate point: ADC, rf modulations amplification link and PGC, as the node of D among Fig. 2～F indication;
Newly-increased rf modulations from down link is amplified the loop detection circuit of link through coupling disc and up link arrival digital intermediate frequency system, shown in curve G among the figure;
Newly-increased from the loop detection circuit of digital intermediate frequency system, shown in curve H among the figure through the rf modulations amplification link of down link and coupling disc arrival up link.
Carry out brief description referring to the principle that Fig. 3 detects VSWR and the outer VSWR of band detects.
VSWR detects the matching degree that is used to detect radio frequency link, mainly is that detection transmits (calculating by feedback power) and reflected signal strength calculates.But the connection status of VSWR detection line, good working condition etc.
The radio frequency link reflected signal that matching degree is high is less relatively.RRU operate as normal and circuit connect under the normal condition, and the VSWR value is less.
The method of being with outer VSWR to detect is identical with the VSWR method, and just to detect be signal in the detection filter device band to VSWR, is the filter out of band signal and the outer VSWR detection of band detects.
Out of band signal filters filtered device under the normal condition, and the outer VSWR value of band can be bigger so.If detected value is very little, the standing wave detection circuit fault is described.
Existing test item comprises in the prior art: the output result to PA in the down link detects, and based on feedback link is carried out fault detect, and the output result of ADC in the up link is detected.
Test item of the present invention can comprise or multinomial combination in any in the above-mentioned test item.
Among the present invention, the mode of a certain element being carried out fault detect is: keep the gain of other elements among the RRU constant, adjust the gain of this element, and to adjusting the output result of based on feedback link compares before and after the gain, if the result of contrast is normal, then the testing result of the pairing test item of this element is normal, otherwise the testing result of the pairing test item of this element is unusual.
Preferably, can at first detect existing test item in the prior art, six investigation points that the present invention is increased newly detect then, and the loopback result of two loopback detection circuits that increase newly according to the present invention at last detects these two loopback detection circuits.
Each test item will be referred to some interdependent nodes, at each test item, for the node that can't confirm whether to exist fault according to the testing result of this test item, this node is changed to 0 corresponding to the weighted value of this test item; For the node of confirming to exist fault according to the testing result of this test item, this node is changed to a positive number corresponding to the weighted value of this test item; For the node of confirming not exist fault according to the testing result of this test item, this node is changed to a negative corresponding to the weighted value of this test item.
Corresponding to said method, the present invention also provide a kind of as shown in Figure 4 the RRU fault is carried out the device of joint-detection.Device shown in Figure 4 comprises: detection module 410, weighting block 420 and fault location module 430.Wherein:
Detection module 410 is used for according to N test item setting in advance RRU being carried out fault detect and obtains testing result corresponding to each test item; N is greater than 2;
Weighting block 420 is used for giving corresponding weighted value according to the testing result of each test item to the related node of this test item;
Fault location module 430 is used for respectively weighted value with each node and adds up and obtain the weighted results of each node, and the node locating that weighted results is the highest is a malfunctioning node.
Preferably, detection module 410 can be used for of following test item or multinomial combination in any are detected:
Output result to PA in the down link detects;
Based on feedback link is carried out fault detect;
Output result to ADC in the up link detects;
Element in the down link is carried out fault detect;
Element in the up link is carried out fault detect;
Carry out fault detect to amplify link from the rf modulations of down link through the loop circuit of coupling disc and up link arrival digital intermediate frequency system;
The loop circuit that amplifies link through the rf modulations of down link and coupling disc arrival up link from the digital intermediate frequency system is carried out fault detect;
Standing-wave ratio (VSWR) detects;
Be with outer VSWR to detect.
Preferably, when the element in the down link was carried out fault detect, DAC, rf modulations amplification link or PGC that detection module 310 can be used for down link carried out fault detect; When the element in the up link was carried out fault detect, ADC, rf modulations amplification link or PGC that detection module 420 is used for down link carried out fault detect.
When element is carried out fault detect, detection module 410 keeps the gain of other elements among the RRU constant, adjust the gain of described element, and to adjusting the output result of based on feedback link compares before and after the gain, result in contrast is under the normal situation, the testing result of judging this test item is for normal, otherwise the testing result of judging this test item is for unusual.
At each test item, for the node that can't confirm whether to exist fault according to the testing result of this test item, weighting block 420 is changed to 0 with this node corresponding to the weighted value of described test item; For the node of confirming to exist fault according to the testing result of this test item, weighting block 420 is changed to a positive number with this node corresponding to the weighted value of described test item; For the node of confirming not exist fault according to the testing result of this test item, weighting block 420 is changed to a negative with this node corresponding to the weighted value of described test item.
Below by a concrete example technical solution of the present invention is further elaborated.
In this example, at first construct weighting record sheet as shown in table 1.In the table 1, the 1st classifies test item as, and (among the present invention, node not only refers to concrete element to each node among the related RRU of the 1st behavior test item, also comprises some and connects links, for example: down link).
Each test item in table 1 the 1st row all is provided with according to the present invention.Successively these test items are detected, and give corresponding weights according to each interdependent node in testing result his-and-hers watches 1 the 1st row, all test items detect finish after, the weights of each node are added up, with the comprehensive detection result who obtains shown in table 1 last column.
In this example, artificially inject down link (TX link) abnormal failure, the result can find according to this comprehensive detection: after detection finishes, what weighted value was the highest is the TX link, therefore, locate this node and exist unusually, as seen adopt technical solution of the present invention can accurately locate the RRU fault.
Table 1
In the table 1,0 representative can't confirm whether there is fault;
May there be fault in the positive number representative;
There is fault scarcely in the negative representative.
As seen from the above-described embodiment, method and the device that the RRU fault is carried out joint-detection provided by the invention, by a plurality of test items are set RRU is carried out fault detect, and give corresponding weighted value to the related node of this test item according to the testing result of each test item, respectively the weighted value of each node is added up at last and obtain the weighted results of each node, the node locating that weighted results is the highest is a malfunctioning node.Thereby, realized the RRU fault location by joint-detection, and made that source of trouble location is more accurate a plurality of test items, can reduce the probability of by mistake giving an encore.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (10)
1. one kind is carried out the method for joint-detection to Remote Radio Unit (RRU) fault, it is characterized in that, comprising:
N test item is set RRU is carried out fault detect; N is greater than 2;
Testing result according to each test item is given corresponding weighted value to the related node of this test item;
Respectively the weighted value of each node is added up and obtain the weighted results of each node;
The node locating that weighted results is the highest is a malfunctioning node.
2. method according to claim 1 is characterized in that, described test item comprises with the next item down or multinomial combination in any:
Output result to down link intermediate power amplifier (PA) detects;
Based on feedback link is carried out fault detect;
Output result to analog to digital converter in the up link (ADC) detects;
Element in the down link is carried out fault detect;
Element in the up link is carried out fault detect;
Carry out fault detect to amplify link from the rf modulations of down link through the loop circuit of coupling disc and up link arrival digital intermediate frequency system;
The loop circuit that amplifies link through the rf modulations of down link and coupling disc arrival up link from the digital intermediate frequency system is carried out fault detect;
Standing-wave ratio (VSWR) detects;
Be with outer VSWR to detect.
3. method according to claim 2 is characterized in that:
Element in the down link comprises: digital to analog converter (DAC), rf modulations are amplified link or preset gain control (PGC);
Element in the up link comprises: ADC, rf modulations are amplified link or PGC.
4. according to claim 2 or 3 described methods, it is characterized in that:
The mode of element being carried out fault detect is: keep the gain of other elements among the RRU constant, adjust the gain of described element, and to adjusting the output result of based on feedback link compares before and after the gain, if the result of contrast is normal, then the testing result of this test item is normal, otherwise the testing result of this test item is unusual.
5. according to each described method of claim 1 to 3, it is characterized in that:
At each test item,, this node is changed to 0 corresponding to the weighted value of described test item for the node that can't confirm whether to exist fault according to the testing result of this test item; For the node of confirming to exist fault according to the testing result of this test item, this node is changed to a positive number corresponding to the weighted value of described test item; For the node of confirming not exist fault according to the testing result of this test item, this node is changed to a negative corresponding to the weighted value of described test item.
6. one kind is carried out the device of joint-detection to Remote Radio Unit (RRU) fault, it is characterized in that, comprising:
Detection module is used for according to N test item setting in advance RRU being carried out fault detect and obtains testing result corresponding to each test item; N is greater than 2;
Weighting block is used for giving corresponding weighted value according to the testing result of each test item to the related node of this test item;
The fault location module is used for respectively weighted value with each node and adds up and obtain the weighted results of each node, and the node locating that weighted results is the highest is a malfunctioning node.
7. device according to claim 6 is characterized in that, described detection module is used for of following test item or multinomial combination in any are detected:
Output result to down link intermediate power amplifier (PA) detects;
Based on feedback link is carried out fault detect;
Output result to analog to digital converter in the up link (ADC) detects;
Element in the down link is carried out fault detect;
Element in the up link is carried out fault detect;
Carry out fault detect to amplify link from the rf modulations of down link through the loop circuit of coupling disc and up link arrival digital intermediate frequency system;
The loop circuit that amplifies link through the rf modulations of down link and coupling disc arrival up link from the digital intermediate frequency system is carried out fault detect;
Standing-wave ratio (VSWR) detects;
Be with outer VSWR to detect.
8. device according to claim 7 is characterized in that:
When the element in the down link was carried out fault detect, fault detect was carried out in digital to analog converter (DAC), rf modulations amplification link or preset gain control (PGC) that detection module is used for down link;
When the element in the up link was carried out fault detect, ADC, rf modulations amplification link or PGC that detection module is used for down link carried out fault detect.
9. according to claim 7 or 8 described devices, it is characterized in that:
When element is carried out fault detect, described detection module keeps the gain of other elements among the RRU constant, adjust the gain of described element, and to adjusting the output result of based on feedback link compares before and after the gain, result in contrast is under the normal situation, the testing result of judging this test item is for normal, otherwise the testing result of judging this test item is for unusual.
10. according to each described device of claim 6 to 8, it is characterized in that:
At each test item, for the node that can't confirm whether to exist fault according to the testing result of this test item, described weighting block is changed to 0 with this node corresponding to the weighted value of described test item; For the node of confirming to exist fault according to the testing result of this test item, described weighting block is changed to a positive number with this node corresponding to the weighted value of described test item; For the node of confirming not exist fault according to the testing result of this test item, described weighting block is changed to a negative with this node corresponding to the weighted value of described test item.
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| CN103702356A (en) * | 2013-12-31 | 2014-04-02 | 大唐移动通信设备有限公司 | TDD (time division duplexing) system-based fault diagnosis device |
| WO2017004920A1 (en) * | 2015-07-06 | 2017-01-12 | 中兴通讯股份有限公司 | Wireless communication device detection method and wireless communication device |
| CN106341355A (en) * | 2015-07-09 | 2017-01-18 | 深圳市中兴微电子技术有限公司 | Digital intermediate frequency processing system detection method and device |
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| WO2022087818A1 (en) * | 2020-10-27 | 2022-05-05 | 罗森伯格技术有限公司 | System and method for testing radio remote unit |
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| CN103227683B (en) | 2015-12-09 |
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