CN100353775C - on site testing equipment and method of mobile communication system - Google Patents
on site testing equipment and method of mobile communication system Download PDFInfo
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- CN100353775C CN100353775C CNB200310104536XA CN200310104536A CN100353775C CN 100353775 C CN100353775 C CN 100353775C CN B200310104536X A CNB200310104536X A CN B200310104536XA CN 200310104536 A CN200310104536 A CN 200310104536A CN 100353775 C CN100353775 C CN 100353775C
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Abstract
The present invention relates to an on site test for digital mobile communication systems, and discloses an on site testing device for the mobile communication systems and a method thereof. On the premise of ensuring the reliability of the result of the on site test, the present invention has the advantages of lowered difficulty and complexity of operation and reduced recording quantity of test data, and thus, the cost of the on site test is greatly reduced. The on site testing device for the mobile communication systems and the method thereof, which adopt both customer terminal equipment with same performance, share one aerial wire by a power divider, and establish two communication links in the same testing environment; then, comparison tests are carried out by fetching different parameter values of the customer terminal equipment, and an optimum value can be selected according to test results.
Description
Technical field
The present invention relates to the on-the-spot test of digital mobile communication system, particularly the on-site testing device of WCDMA mobile communication system and method.
Background technology
3-G (Generation Three mobile communication system) Wideband Code Division Multiple Access (WCDMA) (Wideband Code Division MultipleAccess, be called for short " WCDMA ") system owing to its strong multimedia communication capacity, high-speed data transmission speed and efficiently many advantages such as the availability of frequency spectrum gain great popularity, and become the developing goal of future mobile communications.The WCDMA communication system has adopted with the similar structure of second generation mobile communication system and has comprised Radio Access Network (Radio Access Network, be called for short " RAN ") and core network (CoreNetwork, be called for short " CN "), wherein Radio Access Network is handled all and wireless function associated, all voice calls in the WCDMA system are connected with data and the exchange and the routing function of realization and external network and CN handles, CN is from being divided into circuit commutative field (Circuit Switched Domain in logic, be called for short " CS ") and packet-switched domain (Packet Switched Domain is called for short " PS ").
The WCDMA channel can be divided into dedicated channel and common signal channel two big classes.Dedicated channel comprises: Traffic Channel, Separate Dedicated Control Channel, follow Dedicated Control Channel.Common signal channel comprises: Broadcast Control Channel, forward access channel, paging channel, Random Access Channel.These channels are mapped to corresponding physical channel by different modes.Uplink dedicated physical channels is divided into: Dedicated Physical Data Channel (Dedicated Physical Data Channel, be called for short " DPDCH ") and Dedicated Physical Control Channel (Dedicated Physical Control Channel is called for short " DPCCH ").Public physical channel is Physical Random Access Channel (Physical Random Access Channel is called for short " PRACH ").Downlink physical channel is by Dedicated Physical Data Channel (DPDCH) and Dedicated Physical Control Channel (DPCCH), basic Common Control Physical Channel (Primary Common Control Physical Channel, be called for short " P-CCPCH ") and Secondary Common Control Physical Channel (Primary Common Control PhysicalChannel is called for short " S-CCPCH ") composition.
The exploitation of mobile communication system generally is divided into three phases: grasp and the key application technology chamber of experimentizing test (Lab Test); On-the-spot test (Field Test) towards practicality; The industrialization commercialization stage.Wherein on-the-spot test is necessary links of optimizing the system parameters of mobile communication system with respect to laboratory tests, is in the transition stage of development in laboratory to commercialization.This stage is the important step of whole system exploitation, and it is related to that can system use or key issue such as practical operation situation is whether up to standard in actual environment.Can obtain to be applicable to the system parameters of actual environment by on-the-spot test, can find the careless mistake that exists in the laboratory tests, can guarantee that the system that develops can reliably use.
The on-the-spot test of mobile communication system need be sought wireless link environment in practice, form the practicability on-site test system, according to technical specification, pilot system is carried out on-the-spot test, comprise steps such as optimization record to system parameters, finally make it conformance with standard, verify its feasibility, and can be applicable in the business machine.
Because the uncertainty and the nonrepeatability of wireless communications environment, in order to guarantee on-the-spot test result's reliability, the tester must carry out statistical test to wireless communications environment, take large sample capacity statistical method, repeatedly test result record and analysis are optimized and estimate according to the statistical parameter result then.
In the on-the-spot test of WCDMA system, comprise the field optimizing step of system parameters.The system parameters here comprises the power bias value of the up-downgoing channel of base station (Base Station is called for short " BS ", also claims " Node B " or " NodeB "), the transmission power level of subscriber terminal equipment (User Equipment is called for short " UE ") etc.The device of the system parameter field optimizing of WCDMA system generally comprises base station, subscriber terminal equipment, monitoring and analytical equipment, Radio Link etc.
Different with the laboratory tests environment, the on-the-spot test wireless environment is comparatively complicated, and the gain that general single algorithm parameter brings for the link performance of whole system is generally less, in the magnitude at several decibels of zero points.Present field optimizing method all adopts the method for sample statistics, and general step comprises:
According to time, spatial stochastic sampling, adopt self-contained unit, carry out a large amount of on-the-spot test tests;
The data of the each experiment of record, and carry out statistical analysis;
Contrast according to analysis result is optimized system parameters;
Repeat above testing procedure, satisfy predetermined requirement up to test result.
In actual applications, there is following problem in such scheme: for the algorithm parameter that obtains an optimization often needs to carry out a large amount of test samples that have on the statistical significance, influence could be got rid of, and huge testing cost can be brought like this owing to complicated wireless environment.
Cause a main cause of this situation to be, the statistical test that adopts the isolated user terminal equipment to carry out non-contrast makes that all test results are uncorrelated, can only carry out the statistical analysis of large sample.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of on-site testing device and method thereof of mobile communication system, make on-the-spot test under the prerequisite that guarantees its result reliability, reduce operation easier and complexity, reduce the record amount of test data, reduce the cost of on-the-spot test thus greatly.
In order to solve the problems of the technologies described above, the invention provides a kind of on-site testing device of mobile communication system, comprise:
Common antenna is used to realize the signal transmitting and receiving of all described subscriber terminal equipments;
At least two subscriber terminal equipments that performance is identical are used for communicating according to the parameter value that is provided with;
Power divider, link to each other with described common antenna and subscriber terminal equipment, be used for the signal of synthetic described subscriber terminal equipment and send, and be divided at least according to predetermined power ratio the signal that described common antenna receives that two-way sends corresponding described subscriber terminal equipment respectively to by described common antenna;
The unified clock source is used to provide the unified time label;
At least two control desks, link to each other with a described subscriber terminal equipment separately, and link to each other with described unified clock source, be used to control described subscriber terminal equipment receiving and transmitting signal, and write down data and the corresponding time tag that described subscriber terminal equipment is tested under the parameter value of described setting, select than the figure of merit according to test result.
Wherein, described unified clock source is based on the clock source of global positioning system.
The on-the-spot test method of mobile communication system provided by the invention comprises following steps:
A. first and second subscriber terminal equipments are provided with identical parameter value, carry out consistency check;
B. described first and second subscriber terminal equipments are got the first different parameter values and second parameter value, test and record data and time tag;
C. select than the figure of merit according to test result.
Wherein, between described step B and described step C, also comprise following steps:
D. the parameter value of described first and second subscriber terminal equipments is exchanged, tested and record data and time tag;
E. judge whether twice test result be approximate, if then enter step C, otherwise enter step F;
F. test result is invalid, checkout system and test again.
Step e also comprises following steps:
G. judge that test result whether in error range, if then enter step C, otherwise enters step F.
Error range described in the described step G is that the result according to consistency check described in the described steps A calculates.
Consistency check described in the described steps A is carried out repeatedly, and each time record data are averaged, as check result; Test described in described step B, the step D is carried out repeatedly, and the data of each time test record are averaged, as test result.
The parameter value that is provided with when described subscriber terminal equipment is tested is issued by base station system.
By relatively finding, technical scheme difference with the prior art of the present invention is, use two subscriber terminal equipments that performance is identical, and by the shared antenna of power divider, set up two communication links that test environment is identical, compare test by subscriber terminal equipment being got different parameter values then, select than the figure of merit according to test result.
Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly reduced greatly in the on-the-spot test because the uncertainty that the variation of wireless environment brings, feasible script can only be simplified by the test of a large amount of collection sample datas, it is convenient that test operation becomes, and testing cost significantly reduces.
Description of drawings
Fig. 1 is an on-site testing device structure chart according to an embodiment of the invention;
Fig. 2 is an on-the-spot test method flow diagram according to an embodiment of the invention.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.
The present invention is from the viewpoint of contrast test, adopt two subscriber terminal equipments that performance is identical, in same test environment, carry out the test of different parameters configuration according to the objective optimization parameter, and the data of system's various piece are carried out record according to the unified clock label, be analyzed at last, realize the purpose of parameters optimization.
With reference to the accompanying drawings to composition, function, the connection of the on-site testing device of one embodiment of the present of invention, and the step of method of testing, be elaborated.
In one embodiment of the invention, parameter to be optimized is two subchannel DPDCH of uplink dedicated physical channels, the power bias value β c of DPCCH, the ratio of β d, the data of judgement test result of record are signal-to-jamming ratio (the Signal Interference Ratio of the every time slot received signal of up link of the every time slot transmission power level of up link of UE side and NodeB side, be called for short " SIR ") and Block Error Rate (Block Error Ratio, be called for short " BLER "), the unified clock label that adopts is provided by global positioning system (Global Positioning System is called for short " GPS ").
Fig. 1 is the structure chart of on-site testing device according to an embodiment of the invention.As shown in the drawing, the on-site testing device of present embodiment has comprised two UE that performance is identical: first subscriber terminal equipment 11 (UE11) and second subscriber terminal equipment 12 (UE12); Two control desks: control desk 13 and control desk 134; A power divider 15; Two cover transmit receive antennas 16 and 20; Wireless communication link 17 to be tested; A base station system 18 (NodeB) and three gps clock sources 19.
Wherein UE11, UE12 are the identical subscriber terminal equipments of performance, and such as two mobile phones that specification is identical, UE11, UE12 can communicate with the control corresponding platform, receive the control of control desk, and can transmit data and give control desk; Control desk 13, control desk 14 are custom-designed functional modules, can control UE, and write down the data of test according to the time tag in gps clock source; Power divider 15 synthesizes the two paths of signals of UE side at antenna side and passes through antenna transmission, perhaps the signal that antenna side is received distributes two delivery outlets that output to the UE side by certain power ratio, and power divider 15 can be 15 of the microwave power dividers of corresponding band; Antenna can transmit and receive radio signal; Wireless communication link is the representative wireless communications environment of selecting in when test, and is selected in advance and do not change in test process, according to application requirements such as wireless environments such as field, indoor, groups of building, vehicle are arranged; Promptly according to the base station system of WCDMA standard design, it also is connected in other network function module NodeB, and it can write down relevant system parameters and performance data according to the time tag in gps clock source, and analyzes; The gps clock source is promptly according to the equipment that unified clock can be provided of GPS principle design, such as GPS time dissemination system receiver.
In a preferred embodiment of the present invention, UE11 links to each other with control desk 13, and UE12 links to each other with control desk 14, mainly finishes control and the data communication of control desk to UE; Control desk 13 also links to each other with corresponding gps clock source 19 with control desk 14, provides the unified time label to control desk; UE11 links to each other with two interfaces of power divider 15 respectively with UE12, and signal is sent to power divider 15, and from power divider 15 received signals; Power divider 15 links to each other with the antenna 16 of this end, and the UE11 here, UE12 connect together by power divider 15, and a shared antenna 16 transmits and receives, and realizes the consistency of two UE test environments; NodeB18 links to each other with its antenna 20, carries out transmitting and receiving of wireless signal by this antenna; NodeB18 also links to each other with corresponding gps clock source 19, receives the unified time label, is used for the data time alignment and analyzes; Wireless communication link 17 is signal channels of antenna 16 and antenna 20, realizes communicating by letter between base station and the UE.
At the scene in the test process, down link signal is produced by antenna transmission to wireless communication link by NodeB18, and is received by UE side antenna 16, and signal is divided into two-way through power divider 15 according to certain ratio, sends UE11, UE12 respectively to; Uplink signal is controlled corresponding UE by control desk and sent simultaneously, and is by power divider 15 that two paths of signals is synthetic, is sent to wireless communication link by common antenna 16, and received by antenna 20 by NodeB18.NodeB18 writes down and stamps the unified clock label that is provided by gps clock source 19 with the performance parameter of communication during this; The performance index of UE11, UE12 will and be stamped label unified time that is provided by gps clock source 19 by control corresponding platform 13 and 14 records.
Those of ordinary skill in the art are appreciated that described gps clock source 19 also can be to satisfy the unified clock source replacement that accuracy requires, and such as the synchronized clock system that utilizes cable network to coordinate, and does not influence the spirit and scope of the invention.
Fig. 2 is a method of testing flow chart according to an embodiment of the invention.
In the on-the-spot test process, at first enter step 21, UE11, UE12 are provided with identical parameter value, carry out consistency check.Because the performance of UE11, UE12 will directly exert an influence to test result,, before carrying out the parameter comparison test, need carry out consistency check for guaranteeing precision of test result.Such as to UE11, UE12 gets β c: β d is arbitrary less than 1 value a, in a preferred embodiment of the present invention, carry out three tests, UE11, control desk record test data transmission power level and the time tag of UE12, NodeB18 record SIR and BLER value and time tag, and three results are averaged, can avoid influence of random disturbance that test result is caused unsettled influence like this, then with UE11, the comparison of aliging of data based unified time of the label of the corresponding communication link separately of UE12, such as directly subtracting each other, judge then whether the difference that obtains is enough little, if in allowed limits, UE11 is described, the performance unanimity of UE12 can be tested, otherwise, UE11 is described, UE12 performance difference need be reselected UE11, UE12 tests.
After consistency check, then enter step 22, UE11 is got parameter value one, UE12 is got parameter value two, test, and record data and time tag.β c such as UE11: β d gets parameter value one for less than 1 value b, the β c of UE12: β d gets parameter two for less than 1 value c, repeatedly test then, control desk record test data transmission power level and the time tag of UE11, UE12, NodeB18 writes down SIR and BLER value and time tag, and the data of repeatedly test are asked average.In a preferred embodiment of the present invention, with the comparison of aliging of data based unified time of the label of the corresponding communication link separately of UE11, UE12, such as directly subtracting each other, again relatively with the difference that obtains in the difference that obtains and the step 21, judging more excellent parameter value, is that the sir value of UE11 correspondence deducts UE12 such as difference, then diminishes with respect to step 21 when difference, it is more excellent that then the UE11 corresponding parameters is worth a b, otherwise that the UE12 corresponding parameters is worth two c is more excellent.
Then enter step 23, UE11 is got parameter value two, UE12 is got parameter value one, test, and record data and time tag.The β c of UE11 as mentioned above: β d gets parameter value two and is c, the β c of UE12: β d gets parameter one and is b, repeatedly test then, the control desk 13 of UE11, UE12 and 14 record test data transmission power level and time tags, NodeB18 writes down SIR and BLER value and time tag, and the data of repeatedly test are asked average.In a preferred embodiment of the present invention, with the comparison of aliging of data based unified time of the label of the corresponding communication link separately of UE11, UE12, such as directly subtracting each other, again relatively with the difference that obtains in the difference that obtains and the step 21, judging more excellent parameter value, is that the sir value of UE11 correspondence deducts UE12 such as difference, then diminishes with respect to step 21 when difference, it is more excellent that then the UE11 corresponding parameters is worth two c, otherwise that the UE12 corresponding parameters is worth a b is more excellent.
Then enter step 24, judge whether twice test result be consistent, if enter step 25, otherwise enter step 27.As mentioned above, if if all to be parameter one more excellent or all be that parameter two is more excellent for the result that step 22, step 23 obtain, then test result is effective, otherwise that the explanation test exists is uncertain, is to guarantee reliability of testing result, needs test again.
In step 25, judge that the test result reduced value is whether in error range, if then enter step 27, otherwise enter step 26.Because there is certain error in test itself, so if the reduced value of test result is obvious inadequately, can't guarantee that then test result is not caused by error.The error range here can be delimited in advance according to system parameters, and in a preferred embodiment of the present invention, the statistical error that step 21 is repeatedly tested is as the criterion of error range.Such as, the error of step 21 is the dB magnitude, and the difference that step 22, step 23 obtain illustrates then that less than this error amount the test result contrast is obvious inadequately, needs test again.
In step 26, select than the figure of merit according to test result, finish this parameter comparison optimization test.Value that will be more excellent has promptly been selected than the figure of merit from two alternative parameter values as the value of this parameter.
In step 27, judge that test result is invalid, checkout system and test again.The aspect of checking comprises the stability of system, the performance of UE, the stability of wireless communication link, the accuracy of data record etc.
Those of ordinary skill in the art are appreciated that in actual applications, can reach the purpose of optimization system parameter, and not influence the spirit and scope of the invention to a plurality of alternative parameter values by repeatedly two selecting one the optimum value of test selection.
In a preferred embodiment of the present invention, the parameter of UE11, UE12 sends to UE by NodeB18 by down link, and the parameter of whole system can be set by NodeB18 is unified like this, has made things convenient for the operation of test.
Measured result shows: because two shared antennas of UE can cause the working point of UE to be raised, raise the average of up link SIR on less degree, those of ordinary skill in the art are appreciated that this does not influence the application of parameter optimization.
In actual applications, if run into the invalid situation of test result, can consider the following aspects: communication link is normally moved detection, whether all restrain such as the BLER value of analyzing two links, if do not restrain the illustrative system instability, test result is invalid; Note the inspection of UE connection reliability,, also can cause test result invalid if the performance of UE connection line has gap or fault is arranged; Because two shared antennas of UE send and receive, so signal strength signal intensity can descend, can not weigh according to common standard.
Though by reference some preferred embodiment of the present invention, the present invention is illustrated and describes, but those of ordinary skill in the art should be understood that, can do various changes to it in the form and details, and the spirit and scope of the present invention that do not depart from appended claims and limited.
Claims (8)
1. the on-site testing device of a mobile communication system is characterized in that, comprises:
Common antenna is used to realize signal transmitting and receiving;
At least two subscriber terminal equipments that performance is identical are used for communicating according to the parameter value that is provided with;
Power divider, link to each other with described common antenna and subscriber terminal equipment, be used for the signal of synthetic described subscriber terminal equipment and send, and be divided at least according to predetermined power ratio the signal that described common antenna receives that two-way sends corresponding described subscriber terminal equipment respectively to by described common antenna;
The unified clock source is used to provide the unified time label;
At least two control desks, link to each other with a described subscriber terminal equipment separately, and link to each other with described unified clock source, be used to control described subscriber terminal equipment receiving and transmitting signal, and write down data and the corresponding time tag that described subscriber terminal equipment is tested under the parameter value of described setting, select than the figure of merit according to test result.
2. the on-site testing device of mobile communication system according to claim 1 is characterized in that, described unified clock source is based on the clock source of global positioning system.
3. the on-the-spot test method of a mobile communication system is characterized in that, comprises following steps:
A. first and second subscriber terminal equipments are provided with identical parameter value, carry out consistency check;
B. described first and second subscriber terminal equipments are got the first different parameter values and second parameter value, test and record data and time tag;
C. select than the figure of merit according to test result.
4. the on-the-spot test method of mobile communication system according to claim 3 is characterized in that, between described step B and described step C, also comprises following steps:
D. the parameter value of described first and second subscriber terminal equipments is exchanged, tested and record data and time tag;
E. judge whether twice test result be approximate, if then enter step C, otherwise enter step F;
F. test result is invalid, checkout system and test again.
5. the on-the-spot test method of mobile communication system according to claim 4 is characterized in that, step e also comprises following steps:
G. judge that test result whether in error range, if then enter step C, otherwise enters step F.
6. the on-the-spot test method of mobile communication system according to claim 5 is characterized in that, error range described in the described step G is that the result according to consistency check described in the described steps A calculates.
7. according to the on-the-spot test method of any described mobile communication system in the claim 3 to 5, it is characterized in that consistency check described in the described steps A is carried out repeatedly, and each time record data are averaged, as check result; Test described in described step B, the step D is carried out repeatedly, and the data of each time test record are averaged, as test result.
8. according to the on-the-spot test method of any described mobile communication system in the claim 3 to 5, it is characterized in that the parameter value that is provided with when described subscriber terminal equipment is tested is issued by base station system.
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| CN1980100B (en) * | 2005-12-02 | 2011-12-21 | 中国科学院上海微系统与信息技术研究所 | Real-time continuous wide-band wire-less transmitting detection method and apparatus |
| CN100396141C (en) * | 2006-07-10 | 2008-06-18 | 俞文蕴 | Dual-channel radio monitoring and correlation interference direction-finding fixed station system |
| CN100396140C (en) * | 2006-07-10 | 2008-06-18 | 俞文蕴 | Multi-channel radio monitoring and correlation interference direction-finding fixed station system |
| CN101137158B (en) * | 2006-09-19 | 2011-03-23 | 中兴通讯股份有限公司 | Method for performing position orientation to wireless communication data |
| CN111180881B (en) * | 2020-02-12 | 2022-06-10 | Tcl移动通信科技（宁波）有限公司 | Common antenna device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003032579A2 (en) * | 2001-10-08 | 2003-04-17 | Thomson Licensing Sa | Methods and devices for radio link adaptation |
| CN1413423A (en) * | 1999-12-30 | 2003-04-23 | 英国电讯有限公司 | Allocation of channels to radio transceivers |
| CN1435971A (en) * | 2002-02-01 | 2003-08-13 | 汤姆森许可贸易公司 | Method for adapting radio link in network |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1413423A (en) * | 1999-12-30 | 2003-04-23 | 英国电讯有限公司 | Allocation of channels to radio transceivers |
| WO2003032579A2 (en) * | 2001-10-08 | 2003-04-17 | Thomson Licensing Sa | Methods and devices for radio link adaptation |
| CN1435971A (en) * | 2002-02-01 | 2003-08-13 | 汤姆森许可贸易公司 | Method for adapting radio link in network |
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