CN101146310B - A method for testing inter-carrier interference influence on CDMA system capacity - Google Patents
A method for testing inter-carrier interference influence on CDMA system capacity Download PDFInfo
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- CN101146310B CN101146310B CN2007101635223A CN200710163522A CN101146310B CN 101146310 B CN101146310 B CN 101146310B CN 2007101635223 A CN2007101635223 A CN 2007101635223A CN 200710163522 A CN200710163522 A CN 200710163522A CN 101146310 B CN101146310 B CN 101146310B
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Abstract
The invention discloses a method for testing the influence of inter-carrier interference on the capacity of a CDMA system. The method is used to test the influence on the CDMA forward-link capacity, which is implemented by the following steps: configuring single carrier frequency to the system, setting up a connection with an access terminal, and obtaining a forward-link download speed of the access terminal by testing; adding interference carrier frequency in the system configuration, setting up the connection with the access terminal, and obtaining the forward-link download speed of the access terminal by testing; and obtaining the value of influence of the inter-carrier interference on the forward-link capacity of the system. With the inventive method, the test of influence of the inter-carrier interference on the CDMA system capacity is completed by only using one access terminal, thereby saving resources and increasing the test efficiency.
Description
Technical field
The present invention relates to the field tests of mobile communication equipment, be specifically related to a kind of method of under laboratory environment, disturbing between test carrier CDMA (Code Division Multiple Access, code division multiple access inserts) power system capacity influence.
Background technology
Interference between the cdma system carrier frequency is presented as the ACLR (Adjacent Channel Leakagepower Ratio, side channel leakage power ratio) and the ACS (Adjacent Channel Selectivity, the adjacent-channel selectivity of receiver) of transmitter.At test protocol " Recommended Minimum Performance Standardsfor cdma2000 Spread Spectrum Base Stations " (C.S0010), " RecommendedMinimum Performance Standards for cdma2000 High Rate Packet Data AccessNetwork " provides CDMA2000 1X (CDMA2000 Phase One respectively in (C.S0032), the phase I of CDMA2000) system and CDMA20001X EVDO (1x evolution DataOptimized, the 1x Evolution-Data Optimized) ACLR of system and the method for testing of ACS.
In actual applications, interference between carrier frequency directly causes the cdma system capacity to reduce, for disturbing influence degree between test carrier to power system capacity, a large amount of the accessing terminal of general employing set up the voice-and-data business and tested the cdma system capacity that obtains under the single carrier frequency, dispose a plurality of carrier frequency then, set up the voice-and-data business with the terminal of varying number and realize disturbing carrier frequency loading in various degree, test the capacity of disturbed carrier frequency more with this understanding, and then estimate between carrier frequency the influence degree of disturbing the cdma system capacity, said method need expend a large amount of resources, and testing efficiency is low.
Summary of the invention
The objective of the invention is under laboratory environment, provide the method for disturbing between a kind of test carrier the cdma system capacity impact, low in order to the testing efficiency that overcomes the method for testing that exists in the prior art, the problem of the wasting of resources.
In order to realize the foregoing invention purpose, the present invention specifically is achieved in that
A kind of method that is used for disturbing between test carrier to the cdma system capacity impact comprises the steps:
Steps A, configuration-system is single carrier frequency, sets up and being connected of accessing terminal, test obtains the forward direction downloading rate that this accesses terminal;
Step B disturbs carrier frequency for system configuration increases by one, sets up and described being connected of accessing terminal, and test obtains the described forward direction downloading rate that accesses terminal;
Step C obtains the influence value that disturbs between carrier frequency the system forward capacity.
The described method that is used for disturbing between test carrier to the cdma system capacity impact, the described forward direction downloading rate that obtains accessing terminal specifically is meant: access terminal connect after, regulate the forward link attenuator and make the C/I that receives that accesses terminal keep certain numerical value, download the forward direction downloading rate that this accesses terminal from application server.
The described method that is used for disturbing between test carrier to the cdma system capacity impact:
The single carrier frequency of described configuration is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency;
The interference carrier frequency of described increase is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency.
Be used for disturbing between test carrier method to the cdma system capacity impact, among the described step B,
If the interference carrier frequency that increases is a CDMA2000 1X carrier frequency, realize that by configuration orthogonal channel noise simulator channel forward direction loads;
If the interference carrier frequency that increases is a CDMA2000 1X EVDO carrier frequency, realize that by configuration forward link user simulator channel forward direction loads.
The described method that is used for disturbing between test carrier to the cdma system capacity impact, disturb influence value between the carrier frequency that described step C obtains to the system forward capacity:
1 deducts the difference that the forward direction downloading rate ratio that accesses terminal that the forward direction downloading rate that accesses terminal that described steps A obtains and described step B obtain obtains.
A kind of method that is used for disturbing between test carrier to the cdma system capacity impact comprises the steps:
Step a, configuration-system are single carrier frequency, and test obtains the reverse link signal under the target Packet Error Ratio, calculates the reverse link signal to noise ratio;
Step b disturbs carrier frequency for system configuration increases by one, and test obtains the reverse link signal under the target Packet Error Ratio, calculates the reverse link signal to noise ratio;
Step c obtains disturbing between carrier frequency the influence value to the system reverse capacity.
The described method that is used for disturbing between test carrier to the cdma system capacity impact, described test obtains the reverse link signal under the target Packet Error Ratio, specifically is meant:
The described method that is used for disturbing between test carrier to the cdma system capacity impact:
The single carrier frequency of described configuration is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency;
The interference carrier frequency of described increase is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency.
The described method that is used for disturbing between test carrier to the cdma system capacity impact, among the described step B ',
Carrier frequency is disturbed in described increase by, by the signal source generation reverse CDMA 2000 1X EVDO carrier frequency or the CDMA2000 1X carrier frequency of described generation reverse CDMA signal.
The described method that is used for disturbing between test carrier to the cdma system capacity impact, disturb influence value between the carrier frequency that obtains among the described step c to the system reverse capacity:
1 deducts the difference that reverse link signal to noise ratio ratio that reverse link signal to noise ratio that described step a obtains and described step b obtain obtains.
Adopt the method for the invention, adopts one to access terminal and just can finish between the cdma system carrier frequency interference test of cdma system capacity impact has not only been saved resource and also improved testing efficiency.
Description of drawings
Fig. 1 is the test loop schematic diagram that disturbs between carrier frequency the system forward capacity impact;
Fig. 2 is the test loop schematic diagram that disturbs between carrier frequency the system reverse capacity impact;
Fig. 3 is the test flow chart that disturbs between carrier frequency the system reverse capacity impact.
Embodiment
Below in conjunction with the drawings and specific embodiments the method for the invention is elaborated.
Is that example describes with CDMA2000 1X carrier frequency (hereinafter to be referred as the 1X carrier frequency) or CDMA2000 1X EVDO carrier frequency (hereinafter to be referred as the DO carrier frequency) to the interference of DO carrier frequency, and 1X carrier frequency or DO carrier frequency are similar to the disturbed test method of 1X carrier frequency.The interference of DO carrier frequency is comprised to the influence of 1X EVDO system forward capacity with to the influence of 1X EVDO system reverse capacity.
As shown in Figure 1, the test loop that is adopted when carrying out disturbing between test carrier to the system forward capacity impact specifically comprises, tested sector (base station), forward link attenuator, load, AT (accessing terminal), and reverse link attenuator etc.
Because the system forward time division multiplexing, each user can use 100% power, therefore only need test under the situation of noise not having at an AT, then can obtain the system forward capacity.For the interference CF signal of the CF signal of base station system configuration and increase by same radio-frequency (RF) output end mouth output on the tested sector, access terminal by sending to behind the forward link attenuator.
For base station system disposes single DO carrier frequency (carrier frequency 0), connect with AT, regulate C/I (the Received carrier to total interference ratio that the forward link attenuator makes that AT receives, the ratio of the useful signal power in the reception carrier frequency bandwidth and total interference power) remain on more than the 10dB, data download from the application server, promptly obtain the forward direction downloading rate of AT, promptly the forward direction power-carrying of system is designated as C
Max, obtain the forward direction power-carrying of system under single carrier frequency.
Keep test loop constant, base station system increases by one of configuration and disturbs carrier frequency (carrier frequency 1), realizes that forward direction in various degree loads, and the AT forward direction downloading rate under the test carrier frequency 0 this moment is designated as C then
Max 1, i.e. the forward direction power-carrying of carrier frequency 0, and then obtain disturbing between carrier frequency influence to be (1-C to the system forward capacity
Max 1/ C
Max) * 100%.
If the carrier frequency 1 that increases is the 1X carrier frequency, by configuration OCNS (Orthogonal Channel NoiseSimulator, the orthogonal channel noise simulator) channel realizes that forward direction loads, if the carrier frequency 1 that increases is the DO carrier frequency, realize that by configuration FLUS (Forward link user simulator, forward link user simulator) channel forward direction loads.
As shown in Figure 2, the test loop that when carrying out disturbing between test carrier, is adopted to the system reverse capacity impact, specifically comprise, tested sector, forward link attenuator, AT, reverse link attenuator, signal source, and channel power measuring equipment (power meter) etc., AWGN (the Additive White GaussianNoise that transmits and produce with signal source 1,2 of AT through after the reverse link attenuator, additive white Gaussian noise) the reverse CDMA signal of signal and signal source 3,4 generations is synthetic, is input to the rf inputs mouth of tested sector.
The theoretical calculation formula of system reverse power-carrying is:
Wherein: v is the Traffic Channel activity factor, and B is an interference factor, and DRC_Gain is DRC (data rate control) channel gain, and Traffic_Gain is the Traffic Channel gain, E
b/ N
t(The ratio in dB of thecombined received energy per bit to the effective noise power spectral density at thesector RF input ports, at the RF of sector input port, each bit merges energy and the ratio of effective noise power spectrum density, the i.e. signal to noise ratio that receives).
Under disturbing between carrier frequency, the parameter v in the above-mentioned formula, B, DRC_Gain and Traffic_Gain remain unchanged in test process, and can be used as constant and treat, and parameter E
b/ N
tBe affected, change, thereby cause the system reverse power-carrying also to change.
Enable all power controls, the configurating base station system is single DO carrier frequency (carrier frequency 0), and test obtains the reverse link signal under the target P ER (Packet Error Rate, Packet Error Ratio)
Calculate reverse link E according to reverse link signal
b/ N
t, in the base station system configuration, increase by 1 and disturb carrier frequency (carrier frequency 1), produce reverse 1X carrier frequency or DO carrier frequency by signal source 3,4, realize disturbing the reverse loading on the carrier frequency.Test obtains the reverse link signal under the target P ER
Calculate reverse link E according to reverse link signal
b/ N
t, and then obtain between carrier frequency disturbing the size that influences to the system reverse capacity.Be the CF signal of base station system configuration and identical input, the output port of interference CF signal use of increase.
Described test obtains the reverse link signal under the target P ER
Specifically be achieved in that shutdown signal source 3,4; Regulate AWGN signal source 1,2, make the noise power spectral density of RF input port of each base station system be-84dBm/1.23MHz; Set up being connected of a base station system and AT, configuration testing is used RTAP (Reverse Test Application Protocol, negative testing application protocol), and making the reverse data channel data rate is 9.6kbps; Regulate the reverse attenuation device on two links, guarantee that the two-way reverse link is in a basic balance, promptly arrive the signal of the RF input port of each base station system
Equate, guarantee that simultaneously the PER of background test software statistics is stabilized near the reverse power control target P ER; Test obtains reverse link signal
Then according to the reverse link E under the reverse link signal calculating target P ER
b/ N
t, be designated as E
0
The maintenance test loop is constant, increases by 1 and disturb carrier frequency (carrier frequency 1) in base station system disposes, by the reverse loading on signal source 3,4 reverse 1X carrier frequency of generation or the DO carrier frequency realization interference carrier frequency.Test above repeating, test obtains the reverse link E under the target P ER
b/ N
t, be designated as E
1, N herein
tThe noise that does not comprise signal source 3,4 then disturbs the influence of 1 pair of DO system reverse of carrier frequency capacity to be (1-E
0/ E
1) * 100%.
Particularly, be illustrated in figure 3 as, disturb test flow chart between carrier frequency, specifically comprise following processing the system reverse capacity impact:
Step S301 enables all power controls, and the configurating base station system is single DO carrier frequency;
Step S302 connects tested sector and accesses terminal in mode shown in Figure 2;
Step S303, signalization source 1,2 produces the AWGN signal, and makes the noise power spectral density of rf inputs mouth of tested sector reach-84dBm/1.23MHz shutdown signal source 3,4;
Step S304 sets up one and connects and configuration testing application RTAP, makes the reverse data channel data rate meet 9.6kbps;
Step S305, the reverse attenuation device of regulating on two reverse links guarantees that the two-way reverse link is in a basic balance, promptly arrives the signal of each base station RF input port
Equate, guarantee that simultaneously the PER of background test software statistics is stabilized near the reverse power control target P ER;
Step S306, test obtains the reverse link signal under the target P ER
Calculate reverse link E
b/ N
t
Step S307 discharges connection;
Step S308, carrier frequency is disturbed in 1 of increase in base station configuration, and by the reverse loading on signal source 3,4 reverse 1X carrier frequency of generation or the DO carrier frequency realization interference carrier frequency;
Step S309 sets up one and connects and configuration testing application RTAP, makes the reverse data channel data rate meet 9.6kbps, and test obtains the reverse link signal under the target P ER
Calculate reverse link E
b/ N
t
Step S310 discharges connection, according to the E that obtains in step 306 and the step 309
b/ N
t, calculate the size of disturbing between carrier frequency the system reverse capacity that influences.
For reflecting in the actual environment influence of disturbing between carrier frequency power system capacity more realistically, also can in Fig. 1, Fig. 2, increase channel simulator and come under the simulating multi-path fading environment influence power system capacity.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. one kind is used for disturbing between test carrier the method to the cdma system capacity impact, it is characterized in that, under laboratory environment, comprises the steps:
Steps A is the single carrier frequency of system configuration, sets up and being connected of accessing terminal, and regulates the forward link attenuator and makes the C/I that receives that accesses terminal remain on more than the 10dB, and data download from the application server promptly obtains the forward direction downloading rate that this accesses terminal;
Step B disturbs carrier frequency for system configuration increases by one, sets up and described being connected of accessing terminal, and test obtains the described forward direction downloading rate that accesses terminal;
Step C obtains between carrier frequency the influence value that disturbs the system forward capacity, and described influence value is: 1 deducts the difference that the forward direction downloading rate ratio that accesses terminal that the forward direction downloading rate that accesses terminal that described steps A obtains and described step B obtain obtains.
2. the method that is used for disturbing between test carrier to the cdma system capacity impact as claimed in claim 1 is characterized in that:
The single carrier frequency of described configuration is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency;
The interference carrier frequency of described increase is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency.
3. the method that is used for disturbing between test carrier to the cdma system capacity impact as claimed in claim 2 is characterized in that, among the described step B,
If the interference carrier frequency that increases is a CDMA2000 1X carrier frequency, realize that by configuration orthogonal channel noise simulator channel forward direction loads;
If the interference carrier frequency that increases is a CDMA2000 1X EVDO carrier frequency, realize that by configuration forward link user simulator channel forward direction loads.
4. one kind is used for disturbing between test carrier the method to the cdma system capacity impact, it is characterized in that, under laboratory environment, comprises the steps:
Step a is the single carrier frequency of system configuration, and test obtains the reverse link signal under the target Packet Error Ratio, calculates the reverse link signal to noise ratio;
Step b disturbs carrier frequency for system configuration increases by one, and test obtains the reverse link signal under the target Packet Error Ratio, calculates the reverse link signal to noise ratio;
Step c obtains between carrier frequency disturbing the influence value to the system reverse capacity, and described influence value is: 1 deducts the difference that reverse link signal to noise ratio ratio that reverse link signal to noise ratio that described step a obtains and described step b obtain obtains;
Described test obtains the reverse link signal under the target Packet Error Ratio, specifically is meant:
Step 1 is closed the signal source that produces the reverse CDMA signal;
Step 2 regulate to produce the signal source of additive white Gaussian noise signal, makes that the noise power spectral density of rf inputs mouth of each base station system is a determined value;
Step 3 connects, configuration negative testing application protocol, and making the reverse data channel data rate is a determined value, regulates reverse link attenuator, and the reverse link signal of the rf inputs mouth that arrives each base station system is equated, calculates reverse link signal.
5. the method that is used for disturbing between test carrier to the cdma system capacity impact as claimed in claim 4 is characterized in that,
The single carrier frequency of described configuration is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency;
The interference carrier frequency of described increase is CDMA2000 1X EVDO carrier frequency or CDMA2000 1X carrier frequency.
6. the method that is used for disturbing between test carrier to the cdma system capacity impact as claimed in claim 5 is characterized in that, among the described step b,
Carrier frequency is disturbed in described increase by, by the signal source generation reverse CDMA 2000 1X EVDO carrier frequency or the CDMA2000 1X carrier frequency of described generation reverse CDMA signal.
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| CN2007101635223A CN101146310B (en) | 2007-10-12 | 2007-10-12 | A method for testing inter-carrier interference influence on CDMA system capacity |
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| CN103916899B (en) * | 2013-01-04 | 2018-08-17 | 中国移动通信集团公司 | Interference signal generating means and method and test signal generate system and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6970680B1 (en) * | 1998-07-31 | 2005-11-29 | Mitsubishi Denki Kabushiki Kaisha | Device for and method of detecting interference waves |
| CN1728621A (en) * | 2004-07-29 | 2006-02-01 | 大唐移动通信设备有限公司 | Method for estimating capability in sector of TD-SCDMA system |
| CN101048003A (en) * | 2006-03-31 | 2007-10-03 | 华为技术有限公司 | Method and device for testing interference property of moving communication system and system planning method |
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2007
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6970680B1 (en) * | 1998-07-31 | 2005-11-29 | Mitsubishi Denki Kabushiki Kaisha | Device for and method of detecting interference waves |
| CN1728621A (en) * | 2004-07-29 | 2006-02-01 | 大唐移动通信设备有限公司 | Method for estimating capability in sector of TD-SCDMA system |
| CN101048003A (en) * | 2006-03-31 | 2007-10-03 | 华为技术有限公司 | Method and device for testing interference property of moving communication system and system planning method |
Non-Patent Citations (2)
| Title |
|---|
| 尹珂.CDMA无线容量分析与测试方法探讨.广东通信技术22 10.2002,22(10),14-18. |
| 尹珂.CDMA无线容量分析与测试方法探讨.广东通信技术22 10.2002,22(10),14-18. * |
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