CN2847712Y

CN2847712Y - High and low accuracy path detector for radio network

Info

Publication number: CN2847712Y
Application number: CN 200520116161
Authority: CN
Inventors: 刘晖; 夏华野; 徐宁; 吕国豪
Original assignee: NINGBO GAOLING COMMUNICATION TECHNOLOGY Co Ltd
Current assignee: NINGBO GAOLING COMMUNICATION TECHNOLOGY Co Ltd
Priority date: 2005-10-21
Filing date: 2005-10-21
Publication date: 2006-12-13
Anticipated expiration: 2015-10-21

Abstract

The utility model relates to a high and low accuracy path detector for a wireless network. The utility model comprises a testing device unit, a main control unit, an input/output unit, interface units and a power supply control circuit, wherein the interface units are mutually connected. The utility model is characterized in that a radio frequency module in the testing device unit is connected with a high-precision crystal oscillator, and the other radio frequency module in the radio frequency module is provided with a low-precision crystal oscillator; the testing device unit is composed of a radio frequency module, a switching circuit, a USB interface circuit and a UART interface; the high-precision crystal oscillator is connected with the input end of a high-precision radio frequency circuit, and the output end of the radio frequency module is respectively connected with the USB interface circuit and the UART interface through the switching circuit; besides, the testing device unit is combined with the main control unit into a wireless network high and low precision path detector through the interface unit. The path detector can carry out intellectualized combined testing, and the testing precision of the device has two kinds of precision of 3 ppm and 0.3 ppm; the stability of the path detector can be raised, the path detector is convenient in carrying and the cost performance is suitable for regional stations.

Description

Wireless network height precision road detector

Technical field

The utility model relates to a kind of high and low precision radio network route measuring instrument that has simultaneously, the mobile communication measuring equipment that can on same screen, show multiple test result in real time, this equipment both had been applicable to the CDMA standard, also was applicable to the measuring instrument of WCDMA and TD-SCDMA standard network simultaneously.

Background technology

Test CDMA at present, WCDMA, the cordless communication network air interface instrument of standards such as TD-SCDMA, this testing equipment generally has only a kind of measuring accuracy, can not satisfy the protocol data requirement of different levels, some testing equipment adopts mobile phone terminal, module is tested the collection network data, data behind the collection analysis always have bigger side-play amount and error, and equipment is huge, heavy, need the more material resources of cost, manpower and time, do not adapt to fast-developing CDMA, WCDMA, the needs of standard cordless communication networks such as TD-SCDMA test do not adapt to the user demand of the regional station yet.

For the needs that use at the regional station, design a kind ofly have high and low two kinds of measuring accuracies (0.3ppm, 3ppm) simultaneously, volume is little, easy to carry, can replace in real time on same screen, show test results, the network road measurement instrument of standards such as CDMA, WCDMA that cost performance is fit to national conditions, TD-SCDMA, wherein the high-precision radio frequency module mainly is accurately to measure the accuracy and the stability of base station frequency, checks whether network reaches the standard-required of base station; Low precision radio-frequency module is then just simulated the frequency accuracy and the stability of ordinary terminal, checks whether the isoparametric side-play amount of frequency of ordinary terminal satisfies the compatible requirement of network.Realize the air interface information of Radio Network Systems such as CDMA is carried out correctly, effectively gathered and analyze with this high and low precision module, defective and deficiency that the system that finds out exists aspect the network coverage, signal quality, user capacity, protocol transmission wait and reach the purpose that makes whole network coordination operation by adjusting base station parameter, position, capacity.

Summary of the invention

The utility model technical issues that need to address are to use same drive test instrument can accurately measure the performance and the index of base station equipment with the wireless mode test, can test the compatibility of same base station equipment simultaneously again with bigger error signal; This measuring technology is applicable to the network system of CDMA, WCDMA and TD-SCDMA standard respectively.

The utility model is realized above-mentioned purpose by the following technical solutions.

Wireless network height precision road detector, it comprises test equipment units, main control unit, input-output unit and their interconnected interface unit and power control circuit, it is characterized in that a radio-frequency module of test equipment units inserts the high-precision crystal oscillator, another piece radio-frequency module carries low precision crystal oscillator; Test equipment units is made up of radio-frequency module, commutation circuit, usb circuit, UART interface; The high-precision crystal oscillator inserts the input of high-precision radio frequency module, and the output of radio-frequency module is connected with commutation circuit, usb circuit and UART interface respectively; Test equipment units is combined into wireless network height precision road detector by interface unit and main control unit.

Radio-frequency module adopt civilian level radio frequency receive and transmitter module is transformed into the instrument level test module that meets testing standard, for CDMA, CDMA, 3 kinds of networks with different systems of TD-SCDMA, what the high-precision crystal oscillator was adopted is the same crystal of reference frequency, needn't change crystal because of the difference of network, only need to change module and get final product; Focus on testing the frequency accuracy and the stability of CDMA, CDMA, 3 kinds of networks with different systems of TD-SCDMA.Wherein a radio-frequency module passes through at external high-precision crystal pierce circuit of its input and radio-frequency antenna, and the high-precision crystal oscillator includes temperature-compensation circuit and improves the precision and the stability of test cell with this, and the radio-frequency module of putting a general precision is in addition simulated the precision and the stability of the frequency of ordinary terminal.When the acquisition function that network and instrument had of preparation for acquiring not simultaneously, take to change collection, the analytical work that corresponding radio-frequency module carries out data, conclude then, send; Change radio-frequency module and avoid damaging core devices for the ease of the user, structurally needn't open whole casing, only need open the detachable shell of radio-frequency module jack interface position, directly change by the radio-frequency module jack interface.

On the above-mentioned basis that hardware configuration is transformed, redesign suitable Control Software, increased the direct measurement of individual instructions to network parameter, system parameters, access parameter, incision parameter, pilot set etc., more than test can be carried out combined test and test automatically, solved the intellectuality of test effectively, the precision of the test of instrument and stability all improve an order of magnitude, two kinds of precision of 3ppm, 0.3ppm are arranged, reduced volume and weight widely, really accomplish small and exquisitely, be convenient to that the individual carries, cost performance all is fit to the regional station and uses.

Description of drawings

Fig. 1 is a radio network route measuring instrument overall structure block diagram.

Fig. 2 is the microcontroller circuit figure of main control unit.

Fig. 3 is high-precision crystal oscillating circuit figure.

Fig. 4 is the commutation circuit figure of test cell.

Fig. 5 is usb circuit figure.

Fig. 6 is power control circuit figure.

Fig. 7 is Subscriber Identity Module and peripheral circuit diagram.

Fig. 8 is a road detector allomeric function block diagram.

Fig. 9 is a drive test application software block diagram.

Embodiment

Below in conjunction with accompanying drawing embodiment is described in further detail, referring to Fig. 1.

Test equipment units comprises: high-precision crystal oscillating circuit 6, radio circuit (7,10) commutation circuit 13, usb circuit 14, UART interface 15.Radio circuit (7,10) comprises that all radio-frequency (RF) receiving circuit (8,11) and radio frequency send (9,12).

Main Control Unit comprises: microcontroller circuit 17 and memory module 21, correspondence with foreign country circuit 25, USB interface 26, UART interface 27 and microprocessor peripheral circuit 28.Microprocessor 17 also comprises acquisition control circuit 18, test control circuit 19, analysis integrated control and treatment circuit 20; Memory module 21 comprises RAM memory circuit 22, procedure stores circuit 23 and data storage circuitry 24.

Input, output unit comprise Subscriber Identity Module and circuit 31, language input/output interface 32, keyboard circuit 30 and display circuit 29.

Interface unit comprises usb circuit 14, serial interface circuit 16,

UART interface

15,27 and usb circuit 26.

Power circuit comprise battery pack, power control circuit 3 and+5V booster circuit 5.

Main control unit 2 and microcontroller circuit 17 are seen Fig. 1 and Fig. 2; As the nucleus module circuit of road detector system, main control unit 2 is being born very heavy task, mainly will finish six tasks such as agreement is explained, data analysis is handled, classification demonstration, QoS of customer test, correspondence with foreign country, storage.In order to guarantee that main control unit has enough real time data processing operational capabilities, hardware is selected 32 powerful ARM7 microprocessors for use, the inner integrated 16K static RAM (SRAM) of ARM7 processor, chip internal carries 8 tunnel 10 A/D converters and 2 32 bit timing devices, PWM unit (6 tunnel output), real-time clock (RTC) and watchdog circuits; Memory configurations can be become 4 groups by the chip exterior memory interface, every group capacity is up to 16Mb, and data width is 8/16/32; Chip can carry out online programming, and it can carry out online programming by serial interface circuit and the built-in DLL (dynamic link library) that carries of main control unit, for the renewal of software version has later on brought convenience.Primary data after microprocessor is gathered the subscriber equipment plate is carried out agreement and is explained, analyzes, classifies, and shows by the LCD LCD screen at last, also can be connected with computer, cooperates drive test software, demonstrates concrete datagraphic.

High-precision crystal oscillating circuit 6 is seen Fig. 3, and the high-precision crystal oscillating circuit is made up of integrated circuit (IC) 7, diode D1, capacitor C 13～15 and CRYST crystal oscillator; Crystal oscillator CRYST adopts the same crystal of reference frequency.Power management chip IC7 can carry out the voltage of 3.3V DC-DC and boost, and can reach the normal voltage of 5V, and for high-precision crystal provides voltage, voltage-stabiliser tube D1 then carries out the voltage monitoring effect.

Commutation circuit 13 is seen Fig. 4; Network data signals after the radio-frequency module acquisition process need be finished communication with corresponding software, owing to adopted the bimodulus piece, need to select the module of different accuracy level to gather, analyze data, so need carry out the selection of corresponding module switches, commutation circuit is made of chip IC 3, this chip adopts high speed, low-voltage, low on-resistance, CMOS analog multiplexer/switch MAX4783, and 9,10,11 pin of chip IC 3 are defined as sheet choosing end, and 14,15 pin are public control end;

Usb circuit Figure 14 sees Fig. 5; This interface can provide on-line software updating for radio-frequency module, for later software version update is provided convenience; Usb circuit is made up of USB conversion chip IC6, USB interface J7, conversion chip adopts special chip USB to change the data transaction chip CP2101 of serial ports UART, the EEPROM of its integration USB transceiver, integrated 512 bytes, and support USB 2.0 interfaces, also can carry out the data transaction that serial ports UART changes the USB mouth.

Power control circuit 3 is seen Fig. 6, and it is battery-powered that power control circuit adopts, by comprise by voltage adjust chip U21, power management chip U8 and U19, logic chip U22 and+5V booster circuit 5.Voltage is adjusted the voltage that chip U21 directly provides battery pack, and adjusting provides a fixed voltage 3.3V-5V, cooperates logic chip U22 and microprocessor to finish the switching on and shutting down of network road measurement instrument; Power management chip U8 finishes the charge function to battery, can be automatically charging current, the voltage of battery pack is ended, and provide corresponding warning information according to charged state, self Automatic Program; Power management chip U19 provides 2 groups of output voltages according to the voltage that battery pack provides, and is respectively 1.8V and 3.3V, for each link of instrument provides required operating voltage; 28 pin of resistance R 57, R58 and microprocessor, form voltage sampling circuit, main program processes voltage monitor message by microprocessor, on the LCD liquid crystal, demonstrate the lattice number of battery electric quantity, the electric energy that provides when battery pack is lower than certain set point, when making the instrument cisco unity malfunction, instrument can provide the alarm measure;

Subscriber Identity Module and circuit 31 thereof are seen Fig. 7, and Subscriber Identity Module and circuit thereof comprise voltage management chip IC 1, Subscriber Identity Module deck UIM1, UIM2; The voltage that voltage management chip IC 1 provides power control circuit, carrying out DC-DC converts to+voltage of 3.3V, offer Subscriber Identity Module can operate as normal operating voltage, the data I/O end of Subscriber Identity Module deck UIM1, UIM2 is connected mutually with the I/O end of the radio-frequency module of CDMA, CDMA, the high and low precision of TD-SCDMA standard network, and can insert different subscriber cards respectively, switching by commutation circuit, carry out selectivity work, so that require to gather, analyze data with the height levels of precision of the protocol data of different levels;

In conjunction with Fig. 8 road detector allomeric function block diagram and Fig. 9 drive test application software block diagram, describe with CDMA standard network below, also be applicable to WCDMA and TD-SCDMA standard network simultaneously:

2 radio-frequency modules are by different Subscriber Identity Modules, insert the cdma network of appointment, wherein a module adopts external crystal oscillator that high-precision reference signal is provided, make module precision and stability reach the requirement (precision is higher than 0.3ppm) of instrument level, with this accuracy and stability of accurately measuring base station frequency, check whether network reaches the standard-required of base station; An other module carries low precision crystal oscillator (precision is more than 3ppm), be used for simulating the frequency accuracy and the stability of ordinary terminal, check whether the isoparametric side-play amount of frequency of ordinary terminal satisfies the compatible requirement of network, and these 2 radio-frequency modules are finished the reception and the demodulation of data as the core of test equipment units; The function that is had when the network of gathering and road detector itself is not simultaneously, detachable shell by dismounting radio-frequency module position, change corresponding radio-frequency module and carry out the collection network data, test equipment units is according to the instruction of main control unit, by control bus automatic switch-over circuit is operated, automatically switch to the accuracy class requirement of the needed protocol data of user, by corresponding module collection, analyze data, the test data that receives the back demodulation is carried out the agreement explanation by the microprocessor that the UART interface sends main control unit to, analysis/processing, classification shows, after a series of processing such as storage, on LCDs, demonstrate testing result at last, perhaps pass through the direct and computer realization data interchange of USB mouth, further analyze use for drive test software, also the data that test equipment units can be gathered are through microprocessor analysis, after the processing, unloading is further analyzed use for drive test software to external CF or SD card.The design can provide voice communication line simultaneously, carry out the different user dialogue, conveniently carry out network test, and multiple information output form arranged, LCDs is a Chinese interface, human-computer dialogue adopts keyboard mode to import, and subsidiary big electric current supplying cell group, has improved the service time and the portable notion of instrument.

When network road measurement instrument and GPS receiving instrument, when drive test software is connected mutually, the GPS receiving instrument then only provides fixed-point data, the main control unit of network road measurement instrument is according to test instruction, by control bus commutation circuit is carried out after function switches, radio-frequency module and Subscriber Identity Module carry out the collection of cdma network data, network can not solve the network-adaptive problem by changing corresponding radio-frequency module simultaneously, and carry out corresponding preliminary agreement and explain, analyze, sort out, by commutation circuit after the UART interface, carry out data communication with main control unit, network data is then further carried out agreement by the microprocessor of main control unit once more and is explained, analyzing and processing, classification shows, storage, and carry out human-computer dialogue by lcd screen demonstration and keyboard and operate, with the USB port of road detector with after the USB port of computer is connected, drive test software can USB port automatic and road detector carry out the agreement communication, after reaching an agreement, the fixed-point data that data after the network road measurement instrument acquisition process will provide with GPS, the data collection and analysis layer 100 of sending to software inhouse together carries out analyzing and processing, the data readback operation of data storage operations of line data cache management 102 of going forward side by side and playback controls module 101 is showing replayed section (showing the test travel track on map) on the software; After treating the data parsing processing of message parse layer 103, software will carry out message data at messaging layer 104 automatically and conclude classification;

The message that shows the 3rd protocol layer at messaging list window 105;

Represent as event contents such as speaking test, cutting off rate tests at list of thing window 106;

Represent when carrying out network test in map list window 107, the concrete setpoint information of process;

Represent as dynamic curve diagrams such as received power, channel, signal strength signal intensities at parameterized graphics window 108;

Represent the number of times of generation incident at statistical window 109, as traffic rating, cutting off rate etc.;

At form window 110, with the collected data of statement form output, print, conveniently consult.

Claims

1, wireless network height precision road detector, it comprises test equipment units, main control unit, input-output unit and their interconnected interface unit and power control circuit, a radio-frequency module (7) that it is characterized in that test equipment units inserts high-precision crystal oscillator (6), and another piece radio-frequency module (10) carries low precision crystal oscillator; Test equipment units is made up of radio-frequency module (7) (10), commutation circuit (13), usb circuit (14), UART interface (15); High-precision crystal oscillator (6) inserts the input of high-precision radio frequency module (7), and the output of radio-frequency module (7,10) is connected with commutation circuit (13), usb circuit (14) and UART interface (15) respectively; Test equipment units is combined into wireless network height precision road detector by interface unit and main control unit.

2, wireless network height precision road detector according to claim 1, it is characterized in that radio-frequency module adopt to adopt civilian level radio frequency receive and transmitter module is transformed into the instrument level test module that meets testing standard, for CDMA, CDMA, 3 kinds of networks with different systems of TD-SCDMA, what the high-precision crystal oscillator was adopted is the same crystal of reference frequency.

3, wireless network according to claim 1 and 2 height precision road detector is characterized in that the high-precision crystal oscillating circuit is made up of integrated circuit (IC) 7, diode D1, capacitor C 13～15 and CRYST crystal oscillator.

4, wireless network height precision road detector according to claim 1 is characterized in that commutation circuit (13) is made of IC3, and the 9.10.11 pin of IC3 chip is defined as sheet choosing end, and 14.15 pin are public control end.

5, wireless network height precision road detector according to claim 2 is characterized in that main control unit comprises the microcontroller circuit (17) and the memory module (21) of control test equipment units work.

6, wireless network height precision road detector according to claim 1 or 5 is characterized in that the microprocessor (17) of Main Control Unit comprises acquisition control circuit (18), test control circuit (19), analysis/integrated treatment control circuit (20).

7, wireless network height precision road detector according to claim 1 or 5 is characterized in that the memory module (21) of main control unit comprises RAM memory circuitry (22), program storage circuit (23) and data storage circuit (24).

8, wireless network height precision road detector according to claim 1 is characterized in that input unit comprises Subscriber Identity Module circuit (31) and the language input/output circuitry (32) that is connected on the test equipment units input.

9, wireless network according to claim 1 height precision road detector, it is characterized in that power control circuit comprise by voltage adjust chip U21, power management chip U8 and U19, logic chip U22 and+5V booster circuit (5).

10, wireless network according to claim 1 height precision road detector is characterized in that usb circuit is made up of USB conversion chip IC6, USB interface J7.