CN105553754B - A kind of wireless telecom equipment design method of testability - Google Patents

A kind of wireless telecom equipment design method of testability Download PDF

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Publication number
CN105553754B
CN105553754B CN201510893972.2A CN201510893972A CN105553754B CN 105553754 B CN105553754 B CN 105553754B CN 201510893972 A CN201510893972 A CN 201510893972A CN 105553754 B CN105553754 B CN 105553754B
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unit
fpga
test
circuit
radio frequency
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CN105553754A (en
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范朝元
肖君
苏凌旭
胡龙飞
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Chongqing Jinmei Communication Co Ltd
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Chongqing Jinmei Communication Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/04—Processing captured monitoring data, e.g. for logfile generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0631—Management of faults, events, alarms or notifications using root cause analysis; using analysis of correlation between notifications, alarms or events based on decision criteria, e.g. hierarchy, tree or time analysis
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters

Abstract

The invention discloses a kind of wireless telecom equipment design method of testability, method therein includes: to carry out functional unit division to wireless telecom equipment, including speech and panel unit, processor unit, baseband signal processing unit, radio frequency unit, power amplifier unit, filter cell and backboard unit, wherein speech and panel unit, baseband signal processing unit, radio frequency unit, power amplifier unit, filter cell passes through respective control interface respectively, data communication interface is connected through backboard with processor unit, speech and panel unit externally provide equipment internal element program upgrade interface and maintenance interface.Equipment diagnoses each unit major failure when powering on automatically, when breaking down by maintenance interface input test order, test signal is made to pass through internal each unit loopback step by step, the automatic failure diagnosed between each unit.The beneficial effects of the invention are as follows the hardware resources using equipment itself, increase the Testability Design that test software realizes equipment itself, are accurately positioned to the failure inside equipment, substantially reduce the commissioning and Support cost of equipment.

Description

A kind of wireless telecom equipment design method of testability
Technical field
The present invention relates to a kind of wireless telecom equipment design method of testability, belong to electronic product Testability Design skill Art field.
Background technique
In digital wireless communication field, communication equipment becomes increasingly complex, and integrated level is higher and higher, function is stronger and stronger, Structure size is smaller and smaller, and corresponding production test and maintainability test difficulty are higher and higher, by traditional test means without Method solves this problem, therefore, it is proposed to increase Testability Design requirement while functions of the equipments design.
Currently, most of product does not carry out the Testability Design planning of system, the testability of product is poor, existing Method is usually to use boundary scan technique, but this method can only carry out chip-scale event for the device with jtag interface type Interconnection fault detection between barrier and such device, detectability is limited, detects speed and efficiency is lower；In addition, some equipment Using BIT technology in machine, increases special hardware testing circuit, special test bus and dedicated detection inside equipment and connect Mouth is used for the fault location and maintenance conditions of equipment, this will definitely increase equipment cost, reduces equipment dependability, can not adapt to Device miniaturization development trend.
In a certain command communications system, wireless communication device features are powerful, and equipment volume is small, veneer is complicated, equip number It measures more.Scheduling and planning, test and Support difficulty are big, at high cost, when complete machine or veneer failure, can not quickly examine Survey and positioning failure.
Summary of the invention
It is poor the invention aims to solve wireless telecom equipment testability ability, production link veneer and complete machine tune Examination, test are inconvenient, low efficiency, the disadvantage that maintenance support link fault diagnosis is difficult, Support is at high cost, therefore from system Angle proposes a kind of design method of testability of wireless telecom equipment.
In order to achieve the above-mentioned object of the invention, the technical scheme is that
A kind of wireless telecom equipment design method of testability: including speech and panel unit, processor unit, base band letter Number processing unit, radio frequency unit, power amplifier unit, filter cell and backboard unit, wherein speech and panel unit, baseband signal Processing unit, radio frequency unit, power amplifier unit, filter cell pass through respective control interface, data communication interface through carrying on the back respectively Plate unit is connected with processor unit；
The wireless telecom equipment externally provides the maintenance interface of standard, program upgrade interface and tone signal output and connects Mouthful: the RS232 interface and Ethernet interface of processor unit are connected to speech and panel unit, pacify on speech and panel unit For dress general connector convenient for connecting with external general-purpose computer, RS232 maintenance interface realizes input and the test knot of test command The display of fruit exports, and Ethernet interface realizes that the program of equipment internal element updates upgrading, and the output of radio frequency tone signal interface is used Signal source in output radio frequency tone signal, as radio circuit detection；
The wireless telecom equipment power-on self-test, automatically generates test data inside each unit, inside complete cost-element The test of device and its device interconnection circuit judges the failure of this unit component, rosin joint and short trouble, then actively to human-machine interface Mouth output self-checking result；
When the wireless telecom equipment breaks down, into diagnosis service mode, pass through in external general-purpose computer RS232 maintenance interface inputs various loopback test orders, and speech and panel unit is allowed to generate fixed frequency tone signal, signal point Not Jing Guo this unit speech coding-decoding circuit, processor unit, baseband signal processing unit, radio frequency unit, power amplifier unit, filter Wave device unit forms loopback step by step, and the tone signal detection module for being then returned to speech and panel unit carries out receiving and transmitting signal comparison Judgement, device interior failure is accurately positioned；
Each unit printed board provides detailed test point inside the wireless telecom equipment, each in order to more be accurately positioned Unit chip-scale, discrete device grade failure, to power supply signal, clock signal, reset signal, control signal and mould in printed board The quasi- each discrete Surface Mount circular pad for having source level offer not influence signal quality performance of circuit is realized external as test point The introducing of excitation and the observation of key point signal condition.
Compared with prior art, the technical effect that the present invention can reach includes:
1, the RS232 interface that the present invention is externally provided by panel realizes the input of test maintaining order as maintenance interface It shows and exports with test result, realize the controllability and observability of internal element；It is connect by the Ethernet that panel externally provides Cause for gossip shows program and updates upgrading, and complete machine disassembly is avoided to unpack, and improves device program and updates upgrading efficiency；It is externally provided by panel Signal source input of radio frequency tone signal when exporting as this equipment radio frequency circuit test, without external general signal generator；
2, the present invention is by startup power on self detection, before making each use of equipment, is automatically performed each unit inside equipment Hardware detect automatically, and report self-detection result, it is ensured that fault-free either prompts user of service to need before each use of equipment Faulty unit is replaced, guarantees integrity when equipment uses；
3, when equipment breaks down, equipment is made to enter diagnosis service mode, RS232 maintenance interface through the invention is defeated Enter loopback test orders at different levels, close beta data is made to pass through different hardware circuit link respectively, event inside equipment is accurately positioned Barrier.This method is without additionally increasing too many hardware circuit, based on existing hardware resource, carries out rationally drawing for functional unit Point, fault detection and positioning are realized to increase the method for software test program, will not be reduced the reliability of equipment, be improved failure inspection Efficiency and fault location accuracy rate are surveyed, factory test difficulty and Support cost are reduced；
4, the present invention also specifies the design method of testability of each unit printed board inside wireless telecom equipment, each group Power supply signal, clock signal, reset signal, control signal and analog circuit is each discrete has source level to be provided with for outside The test point of the detection of instrument guarantees the controllability and observability of important node inside cell board, it is ensured that inside cell board more Accurately fault location.
Detailed description of the invention
Fig. 1, internal hardware unit composition block diagram of the present invention.
Fig. 2, design method embodiment functional block diagram of the present invention.
Specific embodiment
The following further describes the present invention with reference to the drawings, a kind of wireless telecom equipment design method of testability, side Method is as follows:
According to the hardware resource of equipment, functional unit division carried out to wireless telecom equipment, including processor unit (1), Speech and panel unit (2), baseband signal processing unit (3), radio frequency unit (4), power amplifier unit (5), filter cell (6) and Backboard unit (7), wherein speech and panel unit (1), baseband signal processing unit (3), radio frequency unit (4), power amplifier unit (5), filter cell (6) is respectively by respective control interface, data communication interface through backboard unit (7) and processor unit (2) it connects；Wherein, the RS232 interface of processor unit (2) and Ethernet interface are connected on speech and panel unit (1), General-purpose interface connector is installed on speech and panel unit (1), is connected to general purpose computer with interface cable；Simultaneously speech and Panel unit (1) externally provides the output of radio frequency tone signal.Its testability method implementation steps is as follows:
After equipment is first powered on power-up, each unit is respectively completed power-on self-test, in which:
1) speech and panel unit (1) test this unit power supply status automatically；While tone signal generation module (101) is certainly Movable property gives birth to fixed frequency tone signal, is looped back to tone signal detection module (102) by voice encoding/decoding circuit (103) and carries out Receiving and transmitting signal compares, automatic to test voice encoding/decoding fault；
2) host CPU (201) of processor unit (2) actively carries out the write-in and reading of data between memory (202), Automatic test host CPU (201), memory (202) and interconnection failure between the two；Host CPU (201) active and FPGA (203) reading and reading that data are carried out between, test host CPU (201), FPGA (203) and interconnection between the two automatically Bus failure；
3) DSP (303) of baseband signal processing unit (3) actively between memory (304) carry out data write-in and It reads, tests DSP (303), memory (304) and interconnection failure between the two automatically；DSP(303) actively and The write-in and reading that data are carried out between FPGA (302), test DSP(303 automatically), the interconnection of FPGA (302) and the two it is total Line failure；Channel CPU (301) actively carries out the write-in and reading of data between FPGA (302), automatic to test channel CPU (301), the interconnection failure of FPGA (302) and the two；
4) FPGA (401) of radio frequency unit (4) actively generates test data, by that will send out I/ after D/A conversion circuit (402) Q is sent to transceiver (404), receives I/Q in internal be looped back to hair I/Q of transceiver (404), then passes through A/D conversion circuit (403) FPGA (401) are sent back to and carry out sending and receiving data comparison, judge automatically FPGA (401), the D/A conversion circuit of radio frequency unit (4) (402), A/D conversion circuit (403), transceiver (404) and the line fault between them；
5) the power amplifier current detection circuit (5010) of power amplifier unit (5) and power amplifier temperature sensing circuit (5011) are automatic respectively Detect power amplifier electric current and power amplifier temperature；This cell voltage state-detection is carried out simultaneously；
6) voltage status and tuning state of this unit of filter cell (6) active detecting；
7) each unit actively reports self-detection result to processor unit (2), and self-detection result is by RS232 maintenance interface logical It is shown in PC machine, or inquires self-detection result on the display screen of speech and panel unit (2).
When wireless telecom equipment breaks down, special maintenance command is inputted on computers, makes wireless telecom equipment In diagnosis service mode, its step are as follows:
1) single-tone of tone signal generation module (101) the generation fixed frequency of speech and panel unit (1) inside is controlled Signal, tone signal pass through speech coding circuit (103), and portion forms loopback in the chip, are then output to tone signal detection Module (102) compares into receiving and transmitting signal, judges whether voice encoding/decoding chip is faulty；
2) continue input test order, allow speech coding circuit (103) to be in normal operating conditions, tone signal is through exchanging words Code stream after sound coding-decoding circuit (103) is sent into the FPGA(203 of processor unit (2)), pass through FPGA(203) it is looped back to speech And the tone signal detection module (102) of panel unit (1), judge between speech and panel unit (1) and processor unit (2) Circuit it is whether faulty；
3) continue to input the order of next stage loopback test, cancel the tone signal loopback internal in FPGA (203), by single-tone The FPGA (302) that signal is sent into baseband signal processing unit (3) is internal, internal by tone signal loopback in FPGA (302), then Receiving and transmitting signal comparison, decision processor unit (2) and baseband signal processing unit are carried out in tone signal detection module (102) (3) whether the circuit between is faulty；
4) continue to input the order of next stage loopback test, cancel the tone signal loopback internal in FPGA (302), by single-tone The FPGA (401) that signal is sent into radio frequency unit (4) is internal, internal by tone signal loopback in FPGA (401), then believes in single-tone Number detection module (102) carries out receiving and transmitting signal comparison, judges the electricity between baseband signal processing unit (3) and radio frequency unit (4) Whether road is faulty；
5) continue to input the order of next stage loopback test, cancel the tone signal loopback internal in FPGA (401), by single-tone The transceiver (404) that signal is sent into radio frequency unit (4) is internal, and receiving, transceiver (404) are internal by tone signal loopback, Then receiving and transmitting signal comparison is carried out in tone signal detection module (102), judge the internal FPGA (401) of radio frequency unit (4) and received Whether the circuit between sender (404) is faulty；
6) continue to input next stage test command, cancel tone signal and receiving transceiver (404) internal loopback, it will be single Sound signal is sent into power amplifier unit (5), 30dB fixed load is accessed in the antenna opening of filter cell (6), then in radio frequency list Hair coupler (405) is calculated separately in the FPGA (401) of first (4) and sends out the performance number exported on coupler (503) and standard model The performance number enclosed compares, and judges to export the transmitting exported to the amplifying circuit (502) of power amplifier unit (5) from transceiver (404) Access whether there is failure；Receiving path direction is added between circulator (505) and protection circuit (508) and receives coupler (506), backward power size is detected by backward power detection circuit (507), for judging whether filter cell (6) has event Barrier；
7) continue to input next stage test command, the radio frequency single-tone for connecting speech and panel unit (1) with RF cable is defeated The antenna opening of outlet and (6) of filter cell, control radio frequency tone signal are sent to power amplifier unit by filter cell (6) (5) receiving path, control RF switch (501) and RF switch (407) are switched to receiving path, pass through the receipts of radio frequency unit (4) Coupler (406) is sent to the performance number that transmitting-receiving power-sensing circuit (408) detects input signal for signal is received, the function with pre-value Rate value compares, and judges whether the protection circuit (508) of radio frequency reception access, amplifying circuit (509) are faulty.
When carrying out debugging single board or maintenance, in speech and its panel unit (1) printed board, processor unit (2) print Making sheet, baseband signal processing unit (3) printed board, radio frequency unit (4) printed board, power amplifier unit (5) printed board, filter cell (6) in printed board and backboard unit (7) printed board, each group power supply signal therein, clock signal, reset signal, control signal With analog circuit it is each it is discrete there is source level to be provided with the test point for external instrument detection, external testing instrument can lead to The waveform state that these test points introduce excitation or observe circuit by these test points is crossed, it is then intrinsic with current test point Wave data be compared, precisely judge the failure of each unit intralamellar part chip-scale.

Claims (3)

1. a kind of wireless telecom equipment design method of testability, it is characterised in that: according to the hardware resource of equipment, to equipment into Row functional unit divides, including speech and panel unit (1), processor unit (2), baseband signal processing unit (3), radio frequency list First (4), power amplifier unit (5), filter cell (6) and backboard unit (7), wherein at speech and panel unit (1), baseband signal It is logical by respective control interface, data respectively to manage unit (3), radio frequency unit (4), power amplifier unit (5), filter cell (6) Believe that interface is connected through backboard unit (7) and processor unit (2)；
The RS232 interface that the speech and panel unit (1) externally provide standard is used as maintenance interface, externally offer standard with The too interface that upgrades as internal each unit program of network interface externally provides radio frequency tone signal delivery outlet as radio circuit The signal source of test inputs；
After the wireless telecom equipment power-up, each unit is respectively completed power-on self-test, and actively reports self-test knot to man-machine interface Fruit, method are as follows:
Speech and panel unit (1) test this unit power supply status automatically；Tone signal generation module (101) automatically generates simultaneously Fixed frequency tone signal is looped back to tone signal detection module (102) by voice encoding/decoding circuit (103) and carries out transmitting-receiving letter Number compare, it is automatic to test voice encoding/decoding fault；
The host CPU (201) of processor unit (2) actively carries out the write-in and reading of data between first memory (202), from Dynamic test host CPU (201), first memory (202) and interconnection failure between the two；Host CPU (201) is actively with The reading and reading that data are carried out between one FPGA (203), test host CPU (201), the first FPGA (203) and the two automatically Between interconnection failure；
The DSP (303) of baseband signal processing unit (3) actively carries out the write-in and reading of data between second memory (304) Out, DSP (303), second memory (304) and interconnection failure between the two are tested automatically；DSP (303) actively and The write-in and reading that data are carried out between 2nd FPGA (302), test DSP (303), the 2nd FPGA (302) and the two automatically Interconnection failure；Channel CPU (301) actively carries out the write-in and reading of data between the 2nd FPGA (302), automatic to survey Try the interconnection failure of channel CPU (301), the 2nd FPGA (302) and the two；
3rd FPGA (401) of radio frequency unit (4) actively generates test data, by that will send after D/A conversion circuit (402) I/Q receives I/Q to transceiver (404), in internal be looped back to hair I/Q of transceiver (404), then passes through A/D conversion circuit (403) it sends the 3rd FPGA (401) back to and carries out sending and receiving data comparison, judge automatically the 3rd FPGA (401), the D/A of radio frequency unit (4) Conversion circuit (402), A/D conversion circuit (403), transceiver (404) and the interconnection circuit failure between them；
The power amplifier current detection circuit (5010) and power amplifier temperature sensing circuit (5011) of power amplifier unit (5) are automatic respectively to detect function Discharge stream and power amplifier temperature；This cell voltage state-detection is carried out simultaneously；
The voltage status and tuning state of this unit of filter cell (6) active detecting；
Each unit actively reports self-detection result to processor unit (2), and self-detection result is by RS232 maintenance interface in general purpose PC Upper display, or self-detection result is inquired on the display screen of speech and panel unit (1).
2. a kind of wireless telecom equipment design method of testability according to claim 1, which is characterized in that work as channel radio When believing that equipment breaks down, RS232 maintenance interface is accessed into general purpose computer, inputs special maintenance command on computers, Wireless telecom equipment is set to be in diagnosis service mode, its step are as follows:
The tone signal of tone signal generation module (101) the generation fixed frequency of speech and panel unit (1) inside is controlled, it is single Sound signal pass through coding circuit (103), in the chip portion formed loopback, be then output to tone signal detection module (102) into Receiving and transmitting signal compares, and judges whether voice encoding/decoding chip is faulty；
Continue input test order, voice encoding/decoding circuit (103) is allowed to be in normal operating conditions, tone signal is compiled by speech Code stream after code circuit (103) is sent into the first FPGA (203) of processor unit (2), is looped back to words by the first FPGA (203) The tone signal detection module (102) of sound and panel unit (1), judge speech and panel unit (1) and processor unit (2) it Between circuit it is whether faulty；
Continue to input the order of next stage loopback test, cancels the tone signal loopback internal in the first FPGA (203), single-tone is believed The 2nd FPGA (302) for number being sent into baseband signal processing unit (3) is internal, internal by tone signal ring in the 2nd FPGA (302) It returns, then at tone signal detection module (102) progress receiving and transmitting signal comparison, decision processor unit (2) and baseband signal Whether the circuit managed between unit (3) is faulty；
Continue to input the order of next stage loopback test, cancels the tone signal loopback internal in the 2nd FPGA (302), single-tone is believed The 3rd FPGA (401) for number being sent into radio frequency unit (4) is internal, internal by tone signal loopback in the 3rd FPGA (401), then exists Tone signal detection module (102) carries out receiving and transmitting signal comparison, judge baseband signal processing unit (3) and radio frequency unit (4) it Between circuit it is whether faulty；
Continue to input the order of next stage loopback test, cancels the tone signal loopback internal in the 3rd FPGA (401), single-tone is believed The transceiver (404) for number being sent into radio frequency unit (4) is internal, internal by tone signal loopback in transceiver (404), then exists Tone signal detection module (102) carries out receiving and transmitting signal comparison, judges internal 3rd FPGA (401) of radio frequency unit (4) and transmitting-receiving Whether the circuit between letter machine (404) is faulty；
Continue to input next stage test command, cancels the tone signal loopback internal in transceiver (404), tone signal is sent Enter power amplifier unit (5), 30dB fixed load is accessed in the antenna opening of filter cell (6), then the of radio frequency unit (4) The performance number and standard exported on the first hair coupler (405) and the second hair coupler (503) is calculated separately in three FPGA (401) The performance number of range compares, and judges to export the hair exported to the amplifying circuit (502) of power amplifier unit (5) from transceiver (404) Access is penetrated with the presence or absence of failure；Receiving path direction is added second and receives coupling between circulator (505) and protection circuit (508) Device (506) detects backward power size by backward power detection circuit (507), for judging whether filter cell (6) has Failure；
Continue to input next stage test command, with RF cable connect speech and panel unit (1) radio frequency single-tone delivery outlet and The antenna opening of filter cell (6), control radio frequency tone signal are sent to the reception of power amplifier unit (5) by filter cell (6) Access receives coupler (406) finally by the first of radio frequency unit (4) and is sent to transmitting-receiving power-sensing circuit for signal is received (408) detect input signal performance number, compared with the performance number of pre-value, judge radio frequency reception access protection circuit (508), Whether amplifying circuit (509) is faulty.
3. a kind of wireless telecom equipment design method of testability according to claim 1, which is characterized in that in speech and Its panel unit (1) printed board, processor unit (2) printed board, baseband signal processing unit (3) printed board, radio frequency unit (4) In printed board, power amplifier unit (5) printed board, filter cell (6) printed board and backboard unit (7) printed board, each group therein Power supply signal, clock signal, reset signal, control signal and analog circuit is each discrete has source level surface-mount type circular pad As test point, external testing instrument can be introduced excitation by these test points or observe circuit by these test points Waveform state, then the Wave data intrinsic with current test point is compared, and judges the event of each unit intralamellar part chip-scale Barrier.
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