CN101404806B - Method and system for testing HSDPA demodulation and decoding performance of wireless terminal equipment - Google Patents

Abstract

The invention provides a method for testing HSDPA demodulation decoding performance of a wireless terminal device and a system thereof. The method comprises that A. A re-direction module is arranged in the wireless terminal device; the re-direction module is connected to a testing device; the testing device is connected to a signal generating device; the signal generating device is connected to the wireless terminal device; B. The testing device sets up physical characteristics of data to be transmitted; the signal generating device is controlled to send out data to be transmitted according tophysical characteristics; C. The wireless terminal device receives a radio-frequency signal transmitted by the signal generating device, demodulates and decodes the radio-frequency signal; the received data obtained by demodulation and decoding is transmitted to the testing device by the re-direction module; D. The testing device compares transmitted data and received data and calculates error rate, block error rate and information bit thruput according to comparative result. The testing system and the method do not need to depend on loopback mode of the wireless terminal device and can effectively increase reliability of testing result.

Description

A kind of method and system of testing HSDPA demodulation and decoding performance of wireless terminal equipment

Technical field

The present invention relates to communication technical field, be specifically related to a kind of method and system of testing HSDPA demodulation and decoding performance of wireless terminal equipment.

Background technology

It is the enhancement techniques of being introduced by 3GPP R5 version in the evolution of 3G (Third Generation) Moblie technology that high speed downlink packet inserts (HSDPA).HSDPA is the set of some wireless enhanced technology, utilizes link adaptation techniques, according to current link-quality, is purpose to optimize throughput, and each user's down link is reshuffled.For the rapid increase that adapts to wireless data service and the asymmetry of up-downgoing traffic carrying capacity, need TD SDMA (TD-SCDMA) equipment to have the HSDPA ability.In order to guarantee the successful startup of HSDPA business, need improve thorough performance test to wireless terminal device.

The HSDPA performance test is paid close attention to is the terminal that possessed the HSDPA ability in the process that communicates with network, the terminal radio frequency emission, and radio frequency receives and the performance of base band signal process.At present, at the performance test of the terminal that possesses the HSDPA ability, mainly close three kinds of abilities of injection terminal:

A is to the demodulation ability of HS-DSCH (high speed descending sharing channel);

B, the accurately ability of reporting channel quality;

C correctly detects the ability of Downlink Control Information among the HS-SCCH (shared control channel of high speed descending sharing channel).

Wherein, HS-DSCH is the high-speed downlink shared transmission channel that is used for HSDPA, and this channel Mapping is to HS-PDSCH (high-speed physical downlink shared channel (HS-PDSCH)).HS-SCCH also is a down physical channel, is the shared control channel that is used for HSDPA.

In common test, (SS) provides HSDPA network environment by system simulator, by fading channel simulator (FS) simulating multi-path fading environment, by additive white Gaussian noise generator (AWGNGenerator) simulation background noise.SS is by the signaling capability of anolog base station, RNC and core net, and by air interface pulling terminal, record is carried out in the response to terminal in communication process, analyzes and assessment.

The HSDPA performance test generally provides minimum requirement with information bit throughput (R), and this index definition is that the information bit sum that terminal successfully receives is divided by the testing time in certain testing time, and its unit is a kilobits per second.

Because the asymmetry of HSDPA, existing measuring technology can't be carried out the error rate or Block Error Rate analysis with the data complete loopback in up link, can be had only ACK/NACK by the data of loopback.In order to obtain throughput, SS need write down the size of each descending transmission piece, and the correspondence that go up to send at HS-SICH (the shared information channel of high speed descending sharing channel) of statistics terminal each send the ACK/NACK situation of piece and the number of statDTX, by following formula computing information bit throughput:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}F\left(x_n\right)\×N_n}{T}---\left(1\right)$

$F\left(x\right)=\left\{\begin{array}{cc}1& x=\mathrm{ACK}\\ 0& x=\mathrm{NACK}\\ 0& x=\mathrm{statDTX}\end{array}\right.$

Wherein, T is to be the testing time of unit with the second, and M represents the downlink data block sum that SS sends in the whole test process, N _nAnd x _nRepresent information bit that n data block comprises and the terminal feedback information to this data block respectively, F (x) is that statistical information transforms function.If terminal does not correctly demodulate the control information on the HS-SCCH, will cause statDTX.In order to reduce the influence of network side, the transmitting power of general hypothesis HS-SCCH is enough big in the prior art, makes that the probability that DTX occurs is very low.

Throughput on the HS-DSCH is to weigh the index of HSDPA terminal overall performance.Under all desirable conditions of network side, this index mainly is subjected to the common restriction of terminal inner HARQ relevant treatment and AMC relevant treatment except the influence that is subjected to the terminal radio frequency receptivity.In the normative document, the emphasis of HS-DSCH testing throughput is exactly the AMC processing of terminal under the variable reference channel.In this test, the terminal CQI that needs SS to receive on the HS-SICH channel according to the last time reports size and the modulation coding mode that transmission block when HS-DSCH sends next time is set.For the re-transmission of the eliminating HARQ influence to throughput, the maximum transmission times of HARQ is defined as 1 in this test, does not promptly allow to retransmit.In order to add up the throughput of variable reference channel, SS is necessary for each and sends data block reservation size record and relevant terminal feedback, after the response times of record reaches 2000, according to formula (1) computing information bit throughput.

Above-mentioned method of testing requires wireless terminal must possess " loopback " pattern, be after the testing control module of wireless terminal device is received " radio bearer test " message from SS, notify its inner Radio Resource control module, self enters test pattern, and waits for " radio bearer foundation " request from the Radio Resource control module.After receiving this request, " loopback " pattern of terminal promptly is activated, because the asymmetry of HSDPA, existing measuring technology can't be carried out the error rate or Block Error Rate analysis with the data complete loopback in up link, can be had only ACK/NACK by the data of loopback.

Because above-mentioned method of testing connects complicated, the test resource costliness needs SS to support.And concerning SS the implementation procedure more complicated, and can't the data complete loopback be carried out the error rate or Block Error Rate analysis in up link, also must depend on " loopback " pattern of terminal, be difficult to satisfy data service testing requirement more and more at a high speed.Therefore proposing a kind of terminal that do not need enters " loopback " pattern, can carry out the HSDPA performance test, supports that the test macro based on terminal of HARQ and AMC relevant treatment is very necessary.

Summary of the invention

The objective of the invention is to overcome the above-mentioned shortcoming of existing measuring technology, a kind of method and system of testing HSDPA demodulation and decoding performance of wireless terminal equipment are provided, do not need to depend on " loopback " pattern of wireless terminal device, and can effectively improve reliability of testing result.

Technical problem to be solved by this invention provides a kind of

For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:

A kind of method of testing HSDPA demodulation and decoding performance of wireless terminal equipment comprises the steps:

A, redirection module is set in wireless terminal device, redirection module is connected to testing equipment, communicating by letter between the physical layer of wireless terminal device and the upper strata is redirected to testing equipment by redirection module; Testing equipment is connected to signal generating apparatus; Signal generating apparatus is connected to the physical layer of wireless terminal device;

B, testing equipment are provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic;

The radiofrequency signal that the physical layer received signal generation equipment of C, wireless terminal device sends is carried out demodulating and decoding to radiofrequency signal, and the reception data that demodulating and decoding obtains is sent to testing equipment by redirection module;

D, testing equipment compare sending data and receiving data, and calculate the error rate, Block Error Rate and information bit throughput according to comparative result.

Above-mentioned method, among the step B, described physical characteristic comprises: modulation system, coded system, data rate, transmission block size, transformat combination, frequency, transmitting power and code channel distribute.

Above-mentioned method, among the step B, testing equipment is provided with modulation system, coded system and transmission block size according to the CQI report that the wireless terminal device physical layer produces.

Above-mentioned method, among the step D, testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}F\left(x_n\right)\×N_n}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, F (x when n transmission data block is identical with corresponding reception data block _nN of)=1, the sends not F (x simultaneously of data block and corresponding reception data block _nF (x when)=0, the n transmission data block is not solved _n)=0.

Above-mentioned method, among the step D, testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{N}_n\×\mathrm{BER}}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, BER is the error rate.

Above-mentioned method, wherein, described signal generating apparatus comprises radio-frequency signal generator, fading channel simulator, additive white Gaussian noise generator, by the control generation radiofrequency signal of radio-frequency signal generator according to testing equipment, by fading channel simulator simulating multi-path fading environment, by additive white Gaussian noise generator simulation background noise.

A kind of system of testing HSDPA demodulation and decoding performance of wireless terminal equipment comprises, testing equipment, signal generating apparatus and wireless terminal device, wherein:

Be provided with redirection module in the described wireless terminal device, described redirection module is connected to testing equipment, and communicating by letter between the physical layer of wireless terminal device and the upper strata is redirected to testing equipment by redirection module;

Described testing equipment is connected to signal generating apparatus, is used to be provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic;

Described signal generating apparatus is connected to the physical layer of wireless terminal device, the radiofrequency signal that the physical layer received signal generation equipment of described wireless terminal device sends, radiofrequency signal is carried out demodulating and decoding, and the reception data that demodulating and decoding obtains are sent to testing equipment by redirection module;

Described testing equipment also is used for comparing sending data and receiving data, and calculates the error rate, Block Error Rate and information bit throughput according to comparative result.

Compared with prior art, the invention has the beneficial effects as follows:

Existing method of testing can't be carried out the error rate or Block Error Rate analysis with the data complete loopback in up link, can only rely on ACK/NACK computing information bit throughput, and computational methods complexity, consider that ACK/NACK exists certain error rate and the influence of statDTX in the reception of up link, its test result reliability is lower than test macro of the present invention and method.Test macro of the present invention and method can be carried out the error rate and Block Error Rate analysis, do not need to depend on " loopback " pattern of wireless terminal device, and be simple to operate, is easy to realize.Further, the present invention also provides the method for two kinds of computing information bit throughputs: the computational methods basically identical that a kind of method and existing measuring technology adopted wherein, but more accurate for the judgement of ACK/NACK/statDTX; Another method adopts the error rate to come computing information bit throughput, and the result more accurately and reliably.

Description of drawings

Fig. 1 is the test system structure schematic diagram of the embodiment of the invention;

Fig. 2 is the functional schematic of redirection module in the test macro of the embodiment of the invention;

Fig. 3 is the structural representation of testing equipment in the test macro of the embodiment of the invention;

Fig. 4 is the method for testing flow chart of the embodiment of the invention.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.

With reference to Fig. 1, the system of the testing HSDPA demodulation and decoding performance of wireless terminal equipment of the embodiment of the invention comprises: testing equipment, signal generating apparatus and wireless terminal device.

Be provided with a redirection module in wireless terminal device, redirection module is connected to testing equipment by signal transmssion line.Redirection module is isolated the physical layer and the upper layer module such as radio resource control layer and media access control layer of wireless terminal device, and the communication redirection between physical layer and the upper layer module to testing equipment, is carried out subsequent treatment by testing equipment then.Fig. 2 has carried out explanation intuitively to the function of redirection module.

Testing equipment is connected to signal generating apparatus by communication control line, and signal generating apparatus is connected to the physical layer of wireless terminal device by the radio frequency cable line.Testing equipment is used to be provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic; The radiofrequency signal that the physical layer received signal generation equipment of wireless terminal device sends is carried out demodulating and decoding to radiofrequency signal, and the reception data that demodulating and decoding obtains is sent to testing equipment by redirection module; Testing equipment compares sending data and receiving data, and calculates the error rate, Block Error Rate and information bit throughput according to comparative result.

Described signal generating apparatus comprises radio-frequency signal generator, fading channel simulator, additive white Gaussian noise generator, by the control generation radiofrequency signal of radio-frequency signal generator according to testing equipment, by fading channel simulator simulating multi-path fading environment, by additive white Gaussian noise generator simulation background noise.This radiofrequency signal is the data block that possesses physical characteristics such as specific modulation mode, coded system, data rate, transmission block size, transformat combination, frequency, transmitting power and code channel distribution based on pseudo random sequence.The above-mentioned physical characteristic of this radiofrequency signal is provided with by testing equipment, by communication control line radio-frequency signal generator, fading channel simulator, additive white Gaussian noise generator are controlled, made its channel circumstance launch and change according to HSDPA performance test demand.

With reference to Fig. 3, described testing equipment mainly comprises: testing control module, artificial antenna resource control module (RRC), analog media access control module (MAC), interactive input module, radiofrequency signal control module, HSDPA performance parameter computing module and demonstration output module.

Interactive input module is used in advance wireless terminal device and radio-frequency signal generator, fading channel simulator and additive white Gaussian noise generator being provided with, and will carry out the scene of HSDPA performance test and process and set in advance and finish.Artificial antenna resource control module and analog media access control module are used for substituting and are redirected radio resource control layer and the media access control layer that module is isolated, and the physical layer that the scheduling of accepting testing control module drives wireless terminal device is finished the processing of HSDPA correlated process.The radiofrequency signal control module is used for radio-frequency signal generator, fading channel simulator and additive white Gaussian noise generator are controlled, and makes the needs emission signal specific of these instruments according to testing control module.HSDPA performance parameter computing module is used to assist testing control module to finish the calculating of indexs such as the error rate, Block Error Rate and information bit throughput.The demonstration output module is followed the tracks of test process, can show and add up all physical layer message, and export last result of calculation.

Testing control module is to finish the HSDPA performance test, carries out the main modular of HARQ and AMC relevant treatment.Because the air interface radiofrequency signal of simulation is to drive pertinent instruments generations such as radio-frequency signal generator by testing control module notice radiofrequency signal control module; Simultaneously, will be redirected module forwards to testing equipment, handle by the testing control module of testing equipment because the wireless terminal device physical layer sends to the demodulating and decoding result and the data of upper layer module.Like this, do not need data at the up link loopback, testing control module promptly can send piece and receive piece and compare each downlink data, carries out the error rate or Block Error Rate analysis.Handle for AMC, the CQI that testing control module sends on the HS-SICH channel according to described terminal reports size that transmission block when HS-DSCH sends next time is set and modulation, coded system, and notice radiofrequency signal control module is made amendment.Go on so repeatedly, just can finish the information bit quantitative statistics of handling up.For the processing of HARQ, mainly be the processing of HARQ parameter that standard criterion is provided, comprise process number, redundancy versions sequence RV and new data indication NDI.New data indication NDI corresponding to same HARQ process on the HS-SCCH channel that the upset of testing control module notice radiofrequency signal control module will produce comes indicating terminal to have or not new data transmission.If decoding terminals demodulation failure back sends on up HS-SICH channel is NACK and when needing to retransmit, then testing control module notice radiofrequency signal control module keeps NDI constant, and a notice radiofrequency signal control module back redundancy versions retransmission data of the current redundancy versions in the redundancy versions sequence.

Particularly, HSDPA performance parameter computing module is according to following formula computing information bit throughput R:

A)

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}F\left(x_n\right)\×N_n}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, F (x when n transmission data block is identical with corresponding reception data block _nN of)=1, the sends not F (x simultaneously of data block and corresponding reception data block _n)=0.If the dut terminal physical layer does not correctly demodulate the control information on the HS-SCCH, then the data block on the HS-DSCH of this HS-SCCH control causes statDTX, F (x with regard to decoding error _n)=0.

B)

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{N}_n\×\mathrm{BER}}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, BER is the error rate.

With reference to Fig. 4, the method for the testing HSDPA demodulation and decoding performance of wireless terminal equipment of the embodiment of the invention comprises the steps:

Step 401: redirection module is set in wireless terminal device, redirection module is connected to testing equipment, communicating by letter between the physical layer of wireless terminal device and the upper strata is redirected to testing equipment by redirection module; Testing equipment is connected to signal generating apparatus; Signal generating apparatus is connected to the physical layer of wireless terminal device;

Step 402: testing equipment is provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic;

Radio-frequency signal generator, fading channel simulator and additive white Gaussian noise generator are launched the radiofrequency signal of specific modulation mode, coded system, data rate, transmission block size, frequency, transmitting power and code channel distribution with HSDPA characteristic according to being provided with of testing equipment.Wherein, testing equipment is provided with modulation system, coded system and transmission block size according to the CQI report that the wireless terminal device physical layer produces.

Step 403: the radiofrequency signal that the physical layer received signal generation equipment of wireless terminal device sends, radiofrequency signal is carried out demodulating and decoding, and the reception data that demodulating and decoding obtains are sent to testing equipment by redirection module;

Step 404: testing equipment compares sending data and receiving data, and calculates the error rate, Block Error Rate and information bit throughput according to comparative result.Wherein, come computing information bit throughput according to formula (2).

Should be noted that at last, this method of testing and system are except can be used in the HS-DSCH throughput performance of test wireless terminal device, also can be used in HS-DSCH channel quality identification report (CQI) test, the test of HS-SCCH acquisition performance waits the test of other HSDPA performance indexs of correlation; In addition, can also be used for the performance test and the functional test of other voice-and-data domain-functionalities.

Claims (8)

1. the method for a testing HSDPA demodulation and decoding performance of wireless terminal equipment is characterized in that, comprises the steps:

A, redirection module is set in wireless terminal device, redirection module is connected to testing equipment, communicating by letter between the physical layer of wireless terminal device and the upper strata is redirected to testing equipment by redirection module; Testing equipment is connected to signal generating apparatus; Signal generating apparatus is connected to the physical layer of wireless terminal device;

B, testing equipment are provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic;

The radiofrequency signal that the physical layer received signal generation equipment of C, wireless terminal device sends is carried out demodulating and decoding to radiofrequency signal, and the reception data that demodulating and decoding obtains is sent to testing equipment by redirection module;

D, testing equipment compare sending data and receiving data, and calculate the error rate, Block Error Rate and information bit throughput according to comparative result;

Among the step D, testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}F\left(x_n\right)\×N_n}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, F (x when n transmission data block is identical with corresponding reception data block _nN of)=1, the sends not F (x simultaneously of data block and corresponding reception data block _nF (x when)=0, the n transmission data block is not solved _n)=0; Perhaps

Among the step D, testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{N}_n\×\mathrm{BER}}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, BER is the error rate.

2. the method for claim 1 is characterized in that, among the step B, described physical characteristic comprises:

Modulation system, coded system, data rate, transmission block size, transformat combination, frequency, transmitting power and code channel distribute.

3. method as claimed in claim 2 is characterized in that:

Among the step B, testing equipment is provided with modulation system, coded system and transmission block size according to the CQI report that the wireless terminal device physical layer produces.

4. the method for claim 1 is characterized in that:

Described signal generating apparatus comprises radio-frequency signal generator, fading channel simulator, additive white Gaussian noise generator, by the control generation radiofrequency signal of radio-frequency signal generator according to testing equipment, by fading channel simulator simulating multi-path fading environment, by additive white Gaussian noise generator simulation background noise.

5. the system of a testing HSDPA demodulation and decoding performance of wireless terminal equipment comprises testing equipment, signal generating apparatus and wireless terminal device, it is characterized in that:

Be provided with redirection module in the described wireless terminal device, described redirection module is connected to testing equipment, and communicating by letter between the physical layer of wireless terminal device and the upper strata is redirected to testing equipment by redirection module;

Described testing equipment is connected to signal generating apparatus, is used to be provided with the physical characteristic of data to be sent, and control signal generation equipment sends data to be sent according to described physical characteristic;

Described signal generating apparatus is connected to the physical layer of wireless terminal device, the radiofrequency signal that the physical layer received signal generation equipment of described wireless terminal device sends, radiofrequency signal is carried out demodulating and decoding, and the reception data that demodulating and decoding obtains are sent to testing equipment by redirection module;

Described testing equipment also is used for comparing sending data and receiving data, and calculates the error rate, Block Error Rate and information bit throughput according to comparative result;

Described testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}F\left(x_n\right)\×N_n}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, F (x when n transmission data block is identical with corresponding reception data block _nN of)=1, the sends not F (x simultaneously of data block and corresponding reception data block _nF (x when)=0, the n transmission data block is not solved _n)=0; Perhaps

Described testing equipment is according to following formula computing information bit throughput R:

$R=\frac{\underset{n=1}{\overset{M}{\mathrm{\Σ}}}{N}_n\×\mathrm{BER}}{T}$

Wherein, T is the testing time, the number of data blocks of M for sending in time T, N _nBe n and send the information bit that data block comprises, BER is the error rate.

6. system as claimed in claim 5 is characterized in that:

Described physical characteristic comprises that modulation system, coded system, data rate, transmission block size, transformat combination, frequency, transmitting power and code channel distribute.

7. system as claimed in claim 6 is characterized in that:

Described testing equipment is provided with modulation system, coded system and transmission block size according to the CQI report that the wireless terminal device physical layer produces.

8. system as claimed in claim 5 is characterized in that:

Described signal generating apparatus comprises radio-frequency signal generator, fading channel simulator, additive white Gaussian noise generator, by the control generation radiofrequency signal of radio-frequency signal generator according to testing equipment, by fading channel simulator simulating multi-path fading environment, by additive white Gaussian noise generator simulation background noise.

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