CN1287612C - Method of evaluating quality of wireless network - Google Patents
Method of evaluating quality of wireless network Download PDFInfo
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- CN1287612C CN1287612C CNB2003101119700A CN200310111970A CN1287612C CN 1287612 C CN1287612 C CN 1287612C CN B2003101119700 A CNB2003101119700 A CN B2003101119700A CN 200310111970 A CN200310111970 A CN 200310111970A CN 1287612 C CN1287612 C CN 1287612C
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- reverse link
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Abstract
The present invention relates to a method for evaluating the quality of a wireless network. A quality evaluation system is composed of a mobile platform, a base station, a server of a network evaluation system, a measurement command generator, an RTD information combiner for reverse links, a positioning server, a measurement result decoder for forward links, a measurement result combiner for front reverse links and a network performance statistic analyzer, wherein the network evaluation server sends a measurement request, and the base station and the mobile platform are assembled on the measurement command generator; the mobile platform measures the performance of forward links, and the base station measures the performance of reverse links and the RTD information of the reverse links used for positioning; the measurement result combiner for front reverse links combines the measurement results of the mobile platform and the base station to obtain complete quality parameters for the forward links and the reverse links, and a result is obtained by statistic analysis. When the present invention is adopted, the performance of real time for the measurement can be improved, the network quality can be really reflected, and the purpose of automatic measurement is attained; the present invention has the advantages of time and cost saving for line measurement and improved efficiency and quality for the network evaluation.
Description
Technical field
The present invention is used for the quality of wireless network assessment of mobile communication system.
Background technology
The index of the network quality assessment of mobile communication system is a lot, such as call completing rate, cutting off rate, speech quality, transmission power of mobile station or the like.But in fact these indexs all are signal interference ratio SIR (the Signal Interference Ration) decisions of the received signal of travelling carriage received power and travelling carriage.Along with the development of mobile communication system, what the base station covered becomes better and better, and the signal interference ratio of signal just becomes the intensive urban environment of leading indicator, especially telephone traffic of weighing network quality, and the raising of signal interference ratio becomes main problem.
The network planning engineer of mobile communication system generally assesses network by drive test.This method contains GPS receiver 102 and measuring process controller 103 compositions that 101, one of test travelling carriages are used to locate as shown in Figure 1.Testing mobile phone 101 generally is a special tracking exchage terminal, can measure network, and have special Interface and Controler 103 to link to each other, and stores so that measurement result is sent on the controller 103, statistical disposition, demonstration etc.GPS receiver 102 is measured the longitude and latitude of travelling carriage 101 present positions, thereby for the measurement result of travelling carriage 101 provides a two dimension or three-dimensional coordinate, makes things convenient for controller to show the result who measures with two dimension or three-dimensional mode.Controller 103 is used for controlling the measuring process of travelling carriage 101, and the test result 101 and 102 makes up.This method needs Test Engineer's artificial participation, and efficient is low; Need special test travelling carriage, its measurement result generally is better than common user mobile phone; Test is generally carried out on the street, can not reflect real user's operating position, such as the true speech quality of indoor user; When GPS receiver 102 is worked,, thereby have influence on locating accuracy owing to stopping of high building causes effectively receiving satellite signal in the city.In a word, this method of measurement efficiency of measurement is low, can not reflect the running quality of network fully.
The method of this paper invention goes for any a user mobile phone, do not need artificial participation, user mobile phone sends to evaluating server to the communication link quality that measures in real time under system's control, analyze and add up, thereby reflected network quality more truly, improved efficiency of measurement greatly.
Summary of the invention
The present invention needs engineer's on-the-spot test in order to overcome in the prior art, test result can not reflect the defective of the true running quality of network, and efficiency of measurement is low in the solution prior art, can not reflect the problem of network quality in real time.
Technical scheme of the present invention is: constitute quality evaluation system by travelling carriage, the base station that takes one's test, network evaluation system server, measuring command generator, reverse link RTD information combiner, location-server, forward link measurement result decoder, preceding reverse link measurements combiner, network performance statistical analyzer; Comprise the forward link transmitter in the described base station, reverse link demodulator, reverse link performance measuring appliance, the RTD measuring appliance of mobile station signal; Appraisal procedure is:
1.1 sending to measure, the network evaluation service device asks the measuring command generator, measuring command generator configuration relevant base station and travelling carriage;
1.2 travelling carriage carries out the measurement of forward link performance, and measurement result is reported preceding reverse link measurements combiner: the base station is carried out the reverse link performance measurement and the result is sent to preceding reverse link measurements combiner; The reverse link RTD information that base station measurement is used to locate, and be sent to reverse link RTD information combiner, issue location-server by it again;
1.3 preceding reverse link measurements combiner is with the combination of measurements of travelling carriage and base station, the mass parameter that obtains complete forward direction and reverse link sends to the network performance statistical analyzer;
1.4 location-server carries out the location Calculation of travelling carriage according to the loop delay information of the travelling carriage of base station measurement, and the result is sent to the network performance statistical analyzer;
1.5 the network performance statistical analyzer is preceding reverse link measurements and location Calculation result are carried out statistical analysis and the result is sent to the network evaluation service device;
1.6 the network evaluation service device to measurement result store, the network quality in display business zone, provide assessment result.
In the such scheme, the method that travelling carriage carries out the forward link quality parameter measurement is: travelling carriage receives measuring command from the control channel that send the base station, by the forward link performance measuring appliance in the travelling carriage forward link performance of base station is measured, and periodically or according to request measurement result is inserted in the reverse link, send to the base station by the reverse link transmitter in the travelling carriage, after the reverse link demodulator demodulation in the base station, be sent to forward link measurement result decoder through communication network, decoded result sends to preceding reverse link measurements combiner.
In the present invention, the forward link quality parameter of moving table measuring comprises transmitting power, signal interference ratio of received power, the travelling carriage of frame error rate, the travelling carriage of forward link etc.; The reverse link performance parameter of base station measurement comprises frame error rate, signal interference ratio of reverse link etc.
Adopt method of the present invention compared with prior art, can improve the real-time of measurement greatly, truly reflect network quality, reach the purpose of automatic measurement, saved the time and the cost of engineer's drive test, improved the efficient and the quality of network evaluation.
Description of drawings
Fig. 1 is traditional network evaluation measuring system.
Fig. 2 is a measuring system structure chart of the present invention
Fig. 3 is a method of measurement flow chart of the present invention.
Embodiment
The measuring system that the present invention uses is by travelling carriage 220, base station 230 (comprises forward link transmitter 203, reverse link demodulator 206, reverse link performance measures 204, the RTD of mobile station signal measures 205 grades and partly forms), communication network 207, forward link measurement result decoder 208, preceding reverse link measurements combiner 209, reverse link RTD combiner 210, navigation system 211, network performance analysis device 212 and network evaluation service device 213, measuring command generator 214 network entities such as grade are formed, as shown in Figure 2.
Network evaluation system server 213 response users' request, need to determine the zone of network evaluation, determine that according to these zones those base stations have covered these zones then, 213 pairs of The ultimate results of network evaluation system server are filed simultaneously, generate form, print etc.
The zone and the relevant base station of the needs assessment that measuring command generator 214 is determined according to network evaluation service device 213 produce measuring command, and send to each base station and travelling carriage by communication network 207.The measuring command generator can be according to different communication systems such as CDMA or the different measuring command of GSM generation.
The function of the base station transceiver that the base station in the mobile communication system of base station 230 on ordinary meaning (or following Node B) has, also need to measure the loop delay RTD that reverse link carries out performance and mobile station signal.
Travelling carriage 220 receives measuring command from the control channel that send the base station, by forward link performance measuring appliance 201, forward link performance to the base station is measured, and periodically or according to request measurement result is inserted in the reverse link, send to base station 230 by reverse link transmitter 202.After reverse link demodulator 206 demodulation through base station 230, be sent to forward link measurement result decoder 208 through communication network 207.For support soft handover mobile communication system, the reverse link signal that travelling carriage 220 sends also may be by one or more and 230 reception and the demodulation such as 231,232 that have with spline structure.Base station 230,231,232 or the like are sent to reverse link RTD information combiner 210 to the reverse link RTD information that is used to locate by communication network, are carried out the location of travelling carriage again by location-server 211, and positioning result is delivered to network evaluation service device 213.For the IS95CDMA system, this corresponding Power Measurement Report Message.Travelling carriage periodically reports the power measurement report, contains the frame error rate of travelling carriage forward link and the information such as intensity of each pilot tone in the report.When travelling carriage is crossed over cell boarder, also can switch.In the IS95 system, the switching of generation mainly contains soft handover, More Soft Handoff and direct-cut operation.Travelling carriage reports Pilot Strength Measurement Message to system controller, and request is once switched.System controller is to the periodic Power Measurement Report Message and the pilot strength measurement report source codec of cell boarder more, thereby recognizes the signal interference ratio situation and the switch instances of travelling carriage present position.The above-mentioned measurement of travelling carriage has reflected the performance of forward link.
The Frame that forward link measurement result decoder 208 receiving mobiles send therefrom solves the forward link measurement result.Switch owing to exist in the mobile communications network, thus 208 must hang over communication network, thus the measurement result that can send from different base station receiving mobiles.Reverse link measurements combiner 209 before 208 decoded results send to.
The performance of reverse link is then measured by base station 230,231 grades.The parameter of base station measurement comprises signal interference ratio, frame error rate, time of advent of travelling carriage 220 signals or the like.Reverse link measurements combiner 209 before the base station sends to the result who measures, preceding reverse link measurements combiner 209 was in the same place the measurement result composition by the time of the comparison travelling carriage 220 and the measurement result of base station 230, send to network performance analysis device 212, send to network evaluation service device 213 after handling by 212.
In fact 208 and 209 can be set together.But because the forward link measurement result passed through different transmission paths with reverse link measurements, especially real forward link measurement result is to be inserted in the speech of travelling carriage or the Frame to transmit, so separately statement.
Because navigation system has been a mature technique very, the system that especially utilizes travelling carriage RTD information to position can be commercial.In general reverse link RTD information combiner 210 can be closed with preceding reverse link measurements combiner 209 and is located at together, but considers and utilize existing location-server system, so convenient the description is set respectively.
Location-server utilizes reverse link RTD information calculations to go out the position of travelling carriage, is mature technique, and this paper no longer describes in detail.
The measurement result and the locating information of reverse link were carried out statistics and analysis before network performance statistical analyzer 212 received, and analysis result sends to network evaluation service device 213 and files and handle.
Below measurement and evaluation process are specifically described in detail:
220 pairs of forward link quality of travelling carriage are measured, and obtain following record:
[t，FFER，RxPWR，TxPWR，SID
1，SIR
1，SID
2，SIR
2，……] (1)
T is the moment that this measurement takes place
FFER (Forward Link Frame Error Rate) is the frame error rate of t forward link constantly
RxPWR is the received power of travelling carriage
TxPWR is the transmitted power of travelling carriage
SID
iBe t constantly with the cell id of mobile communications,
SIRi is the signal interference ratio that PNi corresponding district signal occupies at mobile phone signal, and unit is dB
Travelling carriage 220 is measured content will be including but not limited to the measurement content of (1).Travelling carriage is according to the setting of base station, periodically or according to system request the measurement result of (1) formula is inserted reverse communication links, be sent to the base station by airlink,, pass to forward link measurement result decoder 208 by communication network 207 then by behind the base station decodes Frame.From Frame, take out reverse link measurements combiner 209 before sending to by 208.
The measurement of 204 pairs of reverse links of reverse link performance measuring appliance of base station 230 also can obtain a reverse link circuit quality record:
[t，RFER，RSIR……] (2)
T measures constantly
RFER is the frame error rate (the perhaps error rate) of reverse link
RSIR is the signal interference ratio of reverse link
The measurement content of reverse link performance measuring appliance 204 will be including but not limited to above-mentioned measurement content.
(2) reverse link measurements combiner 209 before surveying record will mail to by communication network 207 becomes a complete surveying record with the combination of measurements of forward link.
The reverse link RTD measuring appliance 205 of base station is measured the loop delay of mobile station signal, and the record that obtains is:
[t，IMSI，RTD] (3)
T measures constantly
IMSI is the international series number of travelling carriage, the number of unique sign travelling carriage
RTD is the loop delay of travelling carriage reverse link signal
RTD measuring appliance 205 sends to reverse link RTD information combiner 210 to the measurement result of (3).Combiner is picked out all according to IMSI at the measurement result of this travelling carriage, be combined into one group according to t at the RTD of measurements such as synchronization different base station 230,231 again, gives location-server 211 and carries out the calculating of location of mobile station.
Location-server 211 is according to a plurality of RTD, calculate travelling carriage coordinate (x, y).Form a record:
[t，IMSI，x，y] (4)
Then the record as (4) is sent to network performance statistical analyzer 212.Above-mentioned localization method, precision is good inadequately when having only a sub-district to cover in the residing zone of travelling carriage, but for network evaluation, in the place of having only a sub-district to cover, SIR is fine usually, we only need the performance interval of travelling carriage, that is to say can be denoted as this panel region well simply if can't orient the position of the good travelling carriage in position.
Before after reverse link measurements combiner 209 receives 208 and 204 measurement result, according to identical measurements t constantly, (1) formula and (2) formula are combined, obtain a complete link measurements:
[IMSI，t，FFER，RxPWR，TxPWR，RFER，RSIR，SID
1，SIR
1，SID
2，SIR
2，……]
(5) combiner 209 sends to network performance statistical analysis module 212 to the surveying record of (5) formula that obtains.Network performance statistical analysis module 212 is further analyzed the record in (5), at first, obtain the performance data of a certain moment travelling carriage: [IMSI, t at the preceding reverse link in a certain place at the measurement result at same travelling carriage being merged according to IMSI and t, x, y, FFER, RxPWR, TxPWR, RFER, RSIR, SID
1, SIR
1, SID
2, SIR
2... ]
(6) for the mobile communication system of supporting soft handover,, obtain the total SIR of travelling carriage if desired, can obtain,, have if all use dB office by the SIR of each sub-district as the IS95CDMA system:
Obtain the communication quality of a travelling carriage in whole communication process if desired, can do following statistical average:
Thereby obtain signal interference ratio according to the time assembly average.For FER, generally adopt the method for interval statistics, such as according to following interval:
0＜=FER＜=1%, 1＜FER＜=3%, 3＜FER＜=10%, FER＞10% (9) is added up the shared time of each interval FER respectively, again divided by total timing statistics, obtains accounting for the ratio of total time.Network performance statistical analyzer 212 sends to network evaluation service device 213 to measurement result (6), and in the network evaluation service device, except adding up at single mobile station, we more wish to obtain the network quality of whole assessment area.So this need be the measurement result of travelling carriage a coordinate with the positional information, adds up the network performance index in same place, the method for statistics is similar with the FER statistical method that (9) provide to the SIR statistical method that (8) formula provides.Can obtain the performance statistics record in each place in the assessment area in the network evaluation service device:
[x，y，SIR，FER，RxPWR，TxPWR，……] (10)
The network evaluation service device can show SIR, the distribution situation of the data of FER according to the result of (10) on the map of a two dimension; Judge the quality of communication network according to the criterion of setting, can reflect the coverage condition of network according to received power RxPWR, can know the disturbed condition of network according to SIR, FER has then reflected speech quality of network or the like.
The network evaluation method that the present invention describes is real-time, can be used as the powerful measure that detects the mobile communications network operation conditions.And, often need user's complaint or in-site measurement just can pinpoint the problems unlike common drive test appraisal procedure.
Claims (3)
1, a kind of quality of wireless network appraisal procedure constitutes quality evaluation system by travelling carriage (220), the base station (230) that takes one's test, network evaluation system server (213), measuring command generator (214), reverse link loop delay information combiner (210), location-server (211), forward link measurement result decoder (208), preceding reverse link measurements combiner (209), network performance statistical analyzer (212); Comprise forward link transmitter (203) in the described base station, reverse link demodulator (206), reverse link performance measuring appliance (204), the loop delay measuring appliance (205) of mobile station signal; Appraisal procedure comprises:
1.1 sending to measure, network evaluation system server (213) asks measuring command generator (214), measuring command generator (214) configuration relevant base station (230) and travelling carriage (220);
1.2 travelling carriage (220) carries out the measurement of forward link performance, and measurement result is reported preceding reverse link measurements combiner (209); Base station (230) is measured reverse link performance and the result is sent to preceding reverse link measurements combiner (209); The reverse link loop delay information that base station measurement is used to locate, and be sent to reverse link loop delay information combiner (210), issue location-server (211) by it again;
1.3 preceding reverse link measurements combiner (209), obtains the mass parameter of complete forward direction and reverse link with the combination of measurements of travelling carriage and base station and sends to network performance statistical analyzer (212);
1.4 location-server (211) carries out the location Calculation of travelling carriage according to the loop delay information of the travelling carriage of base station measurement, and the result is sent to network performance statistical analyzer (212);
1.5 network performance statistical analyzer (212) is preceding reverse link measurements and location Calculation result are carried out statistical analysis and the result is sent to network evaluation system server (213);
1.6 network evaluation system server (213) to measurement result store, the network quality in display business zone, provide assessment result.
2, the described quality of wireless network appraisal procedure of claim 1, it is characterized in that, the method that travelling carriage (220) carries out the forward link quality parameter measurement is: travelling carriage (220) receives measuring command from the control channel that send base station (230), by the forward link performance measuring appliance (201) in the travelling carriage forward link performance of base station is measured, and periodically or according to request measurement result is inserted in the reverse link, send to base station (230) by the reverse link transmitter (202) in the travelling carriage, after reverse link demodulator (206) demodulation in base station (230), be sent to forward link measurement result decoder (208) through communication network (207), decoded result sends to preceding reverse link measurements combiner (209).
3, claim 1 or 2 described quality of wireless network appraisal procedures is characterized in that, the forward link quality parameter of moving table measuring comprises frame error rate, the received power of travelling carriage, the transmitting power of travelling carriage, the signal interference ratio of forward link; The reverse link performance parameter of base station measurement comprises frame error rate, the signal interference ratio of reverse link.
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| CNB2003101119700A CN1287612C (en) | 2003-10-29 | 2003-10-29 | Method of evaluating quality of wireless network |
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| CNB2003101119700A CN1287612C (en) | 2003-10-29 | 2003-10-29 | Method of evaluating quality of wireless network |
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| CN1287612C true CN1287612C (en) | 2006-11-29 |
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Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100399853C (en) * | 2005-04-18 | 2008-07-02 | 大唐移动通信设备有限公司 | Method and system for testing wireless network |
| CN1866798B (en) * | 2005-05-19 | 2010-04-28 | 中兴通讯股份有限公司 | Special wireless link measurement result reporting method in TD-CDMA communication system |
| CN101227340B (en) * | 2007-01-17 | 2010-09-22 | 中国电信股份有限公司 | Embedded type network quality detecting device and method and evaluation system and evaluation method thereof |
| CN100450255C (en) * | 2007-02-05 | 2009-01-07 | 浪潮乐金信息系统有限公司 | Method for cross-testing validating reliability in wireless network central monitoring service |
| CN101257339B (en) * | 2007-03-01 | 2013-03-20 | 华为技术有限公司 | Broadcasting network and small power base station |
| US20090156198A1 (en) * | 2007-12-14 | 2009-06-18 | Ching-Hao Lee | Method for evaluating mobile communication device utilizing field test logs and system thereof |
| CN101227690B (en) * | 2008-02-04 | 2013-01-16 | 中兴通讯股份有限公司 | System and method for testing GSM system accepting/receiving module uplink and downlink channel quality |
| CN101247613B (en) * | 2008-03-11 | 2012-07-18 | 中兴通讯股份有限公司 | Wireless signal propagation model test approach and system used for honeycomb network |
| US8880111B2 (en) * | 2008-07-25 | 2014-11-04 | Qualcomm Incorporated | System and method for network management |
| CN101431764B (en) * | 2008-10-28 | 2010-06-02 | 中国移动通信集团福建有限公司 | Automatic testing equipment for mobile network quality and network coverage |
| CN101447938A (en) * | 2008-12-08 | 2009-06-03 | 深圳华为通信技术有限公司 | Network service quality processing method, device and system |
| CN102300241B (en) * | 2010-06-23 | 2014-11-05 | 中兴通讯股份有限公司 | Base station performance measurement method and device |
| CN102131224B (en) * | 2010-07-26 | 2014-08-13 | 北京创和世纪通讯技术有限公司 | Wireless network evaluation system and method |
| AU2012384931A1 (en) * | 2012-07-13 | 2015-03-05 | Adaptive Spectrum And Signal Alignment, Inc. | Method and system for performance measurement of a communication link |
| CN103856978A (en) * | 2012-12-06 | 2014-06-11 | 中国联合网络通信集团有限公司 | Mobile network quality assessing method and device |
| CN105101287B (en) * | 2015-07-27 | 2019-06-14 | 中国联合网络通信集团有限公司 | A kind of method and apparatus measuring mobile network quality |
| CN110632624A (en) * | 2018-06-25 | 2019-12-31 | 中移物联网有限公司 | Method, device, equipment and storage medium for determining quality of observation quantity of satellite |
| CN112020091B (en) * | 2019-05-31 | 2023-04-07 | 中国移动通信集团浙江有限公司 | Weak coverage processing method and device based on digitized geographic information |
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