CN104410984A - Wireless AP (access point) RF (radio frequency) index testing system and testing method thereof - Google Patents
Wireless AP (access point) RF (radio frequency) index testing system and testing method thereof Download PDFInfo
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- CN104410984A CN104410984A CN201410690948.4A CN201410690948A CN104410984A CN 104410984 A CN104410984 A CN 104410984A CN 201410690948 A CN201410690948 A CN 201410690948A CN 104410984 A CN104410984 A CN 104410984A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
The invention provides a wireless AP (access point) RF (radio frequency) index testing system and a testing method thereof. At the premise that a wireless AP to be tested is under a non-signaling mode, the testing system performs the wireless AP RF index test. The wireless AP RF index testing system comprises a data sending device and a receiving device. The data sending device constantly sends UDP (user datagram protocol) data streams and emits carrier signals modulated with the constant UDP data streams through a Chariot tool and the wireless AP to be tested. The receiving device, namely a wireless fidelity module, receives the carrier signals and outputs RF indexes of a wireless data package. An adjustable attenuator is arranged between a sending wireless link and a receiving wireless link. The Chariot tool is arranged on the receiving device and used for receiving flow. The testing method is a non-signaling method. According to the arrangement, the data sending device does not functions as a DUT (device under test) control end, and the full-rate RF index test is facilitated; DUT package sending rate is intelligent, and package sending rate is automatically regulated according to attenuation value of the channel.
Description
Technical field
The present invention relates to WAP (wireless access point) radio-frequency (RF) index field tests, the non-signaling pattern particularly in a kind of WAP (wireless access point) radio-frequency (RF) index test process.
Background technology
Traditional WAP (wireless access point) radio frequency testing, be all the method adopting signaling mode test rate, Test Networking figure, with reference to figure 1, utilizes a computer PC 2 to control WAP (wireless access point) DUT to be measured, in addition, a computer PC 1 with wireless network card is adopted to test.
Method of testing is as follows:
1, access point (i.e. DUT) to be measured is operated in signaling test pattern, and the wireless network card on PC1 connects upper DUT.
2, PC2 is as DUT control end, is sent the packet of special speed, the such as packet of 54Mbps speed by cable network mode control DUT.
3, PC1 is as receiving and analyzing end, and analyze packet with wireless network card assistant software, obtain the EVM (error vector) of this speed message, the radio-frequency (RF) index values such as power, complete testing authentication work.
There is the following problem needing to improve in signaling mode test:
1), the WAP (wireless access point) (DUT) of each family, lack unified control command specification, need to develop different control software design on test computer PC2.
2), need computer for controlling PC1 as DUT control end, by cable network Method of Signaling Control, control the message that WAP (wireless access point) sends special speed, increase the complexity of system.
Summary of the invention
The object of the invention is for solving traditional signaling mode test defect, promoting testing efficiency.The non-signaling pattern method of testing of WAP (wireless access point) radio-frequency (RF) index is provided.
Technical scheme of the present invention is: a kind of WAP (wireless access point) radio frequency index testing system, and this test macro, under WAP (wireless access point) to be measured is operated in non-signaling pattern, is tested this WAP (wireless access point) radio-frequency (RF) index to be measured; Comprise: the data sending device that can send UDP message stream continuously, by Chariot instrument, described data sending device launches by described WAP (wireless access point) to be measured the carrier signal that modulation has continuous UDP message stream; Receive the receiving system being responsible for reception by described wireless interface module, between described transmission and reception wireless link, adjustable attenuator is set, in described receiving system, is provided with flow receiving tool Chariot; Described receiving system and wireless interface module export the radio-frequency (RF) index of wireless data packet.
By saving the DUT control end role of data sending device in the present invention, the radio-frequency (RF) index test of full rate can easily be realized.The packet sending speed of DUT is intelligent, can according to the pad value oneself adjustment packet sending speed of passage.
In WAP (wireless access point) radio frequency index testing system of the present invention, optimal way is: the wireless receiving module of described receiving system is the wireless network card with WAP (wireless access point) wireless connections to be measured.Described with WAP (wireless access point) wired connection to be measured.The speed of described RF analysis tool analysis wireless data stream packet, error vector and power.
The present invention also provides a kind of WAP (wireless access point) radio-frequency indicator testing method, and the method utilizes a number of units to send continuous UDP message stream by WAP (wireless access point) to be measured to the data receiving terminal with wireless network card according to transmitting terminal; Comprise the following steps:
Step 1, set up data transmitting terminal and utilize link between WAP (wireless access point) to be measured and data receiving terminal;
Step 2, data receiving terminal set the pad value of the variable attenuator be connected with wireless network card;
Step 3, WAP (wireless access point) to be measured, according to the RSSI received, arrange the message transmission rate adapted, and send continuous print UDP message stream to data receiving terminal;
Step 4, data receiving terminal receive UDP message stream first setting-up time, are analyzed speed, error vector, the power of wireless data by wireless network card; Record speed, error vector, the power of UDP message of corresponding RSSI, reception;
Step 5, change the attenuation of variable attenuator, turn to step 4, until decay is greater than or wait the value set.
Method for optimizing comprises: in described step 3: WAP (wireless access point) to be measured, according to the RSSI received, arranges the message transmission rate adapted and comprises:
When starting to send, WAP (wireless access point) to be measured is determined to arrange the message transmission rate adapted according to speed and RSSI mapping table;
Then, after each change RSSI value, WAP (wireless access point) to be measured obtains the RSSI A of front second setting-up time, check speed and RSSI mapping table, obtain the call number A that RSSI A is corresponding, determine present rate, if the speed of LGI pattern corresponding to call number A, then setting data transmission rate is the SGI pattern speed that call number A is corresponding, otherwise then setting data transmission rate is the speed of the LGI pattern that call number A is corresponding.
Below in conjunction with specific embodiment, the present invention is described in more detail.
Accompanying drawing explanation
Fig. 1 is test macro under signaling test pattern.
Fig. 2 is the test macro under non-signaling mode of the present invention.
Fig. 3 is the embodiment of the present invention 1 flow chart.
Embodiment
Embodiment 1, as shown in Figure 2, be a kind of WAP (wireless access point) radio frequency index testing system structure chart of the present embodiment, this system is based on the chip solution of MTK WAP (wireless access point), provide the rate algorithms under this non-signaling test pattern, and realize the test of WAP (wireless access point) radio-frequency (RF) index.This test macro, under WAP (wireless access point) DUT to be measured is operated in non-signaling pattern, is tested this WAP (wireless access point) DUT radio-frequency (RF) index to be measured; Can send the data sending device PC2 of UDP message stream continuously, data sending device PC2 launches by WAP (wireless access point) DUT to be measured the carrier signal that modulation has continuous UDP message stream; PC2 and DUT adopts wired connection, and PC2 only utilizes DUT to send data.
In addition, also have to receive and launch by WAP (wireless access point) DUT to be measured the receiving system PC1 that modulation has the carrier signal of continuous UDP message stream, PC1 is connected with DUT radio communication by installing superincumbent wireless network card, wireless network card is also provided with adjustable attenuator, and the decay of adjustable attenuator can make RSSI (the signal strength signal intensity instruction that the Received Signal Strength Indication receives) value being sent to DUT in network interface card communication link adjust to-29dB to-27dB from-74 to-72dB.
Also need in systems in which flow rate test instrument Chariot is installed.
In the present embodiment, the non-signaling pattern method of testing of WAP (wireless access point) is as follows, and Test Networking figure reference is as Fig. 2:
1, access point DUT to be measured is operated in non-signaling test pattern, and the wireless network card on PC1 connects upper DUT;
2, the general flow rate test instrument Chariot of PC1 and PC2, continues the UDP message stream running PC2 to PC1 direction;
In the present embodiment, testing tool Chariot is a network application software performance testing tool, and the owner should be NetIQ, and what adopt in the present embodiment is NetIQ Chariot v5.4 version.
3, the wireless network card on DUT with PC1 is connected by adjustable attenuator, and PC1 controls adjustable attenuator, is that step by step modulating is decayed with 3dB, after often adjusting to a pad value, captures should the data message of pad value.Then analyze the speed of message, the radio-frequency (RF) index values such as EVM, Power, complete testing authentication work.
The method of testing of non-signaling pattern has following features:
Save the DUT control end role of PC2, the radio-frequency (RF) index test of full rate can easily be realized.
The packet sending speed of DUT is intelligent, can according to the pad value oneself adjustment packet sending speed of passage.
WAP (wireless access point) will support non-signaling pattern: the packet packet sending speed algorithm that mainly will design a wireless driving, makes WAP (wireless access point) automatically can travel through the rate set of all supports.We just begin one's study and how to design so a kind of algorithm below.
The rate algorithms of WAP (wireless access point) non-signaling pattern, and based on the implementation method of MTK scheme:
1, the data package transmission velocity algorithm of traditional signaling message pattern: the rate selection algorithm of WAP (wireless access point) Packet Generation determines by following 2 parameters:
1) packet packet loss (PER) per second
2) signal strength signal intensity (RSSI) received: the current signal strength of the wireless network card detected.
Algorithm general principle: timer detects PER and RSSI of the Packet Generation of upper one second, determines this message rate of giving out a contract for a project.
This algorithm substantially determines and cannot, simply by change external condition, impel giving out a contract for a project of DUT can travel through all rate set automatically.
2, the present embodiment newly proposes a simple algorithm for this reason.The data package transmission velocity algorithm of non-signaling pattern, for MTK 2*2 11n wireless chip scheme:
Assumed wireless access point is operated in 11n pattern in advance, the speed timer of wireless driving detects the received signal strength RSSI mean value of upper one second, only according to RSSI and Rate mapping relation table (as table 1), the rate sending data bag selecting this suitable.
Because RSSI is that external condition can be fixed, add that mapping relations are also fixed, then, when DUT is operated in this non-signaling pattern, packet sending speed just can choose a fixing speed according to RSSI automatically.Be well positioned to meet the requirement of non-signaling method of testing.
Table 1
The basic flow sheet of this algorithm realization as shown in Figure 3, specifically comprises the following steps:
S1, from link, to be checked through initial RSSI in the attenuation of PC1 high speed variable attenuator to DUT be-28dBm.
S2, DUT automatic rate adjustment algorithm comes into force process.
S201, setting 1s speed timer trigger.
The RSSI A of 1s before S202, acquisition, (when just having started to send data, just adopting current RSSI as RSSI A).
S203, look into RSSI mapping table obtain index A (Index A).
S204, judge that current data transmission rate is the data package transmission velocity of the RSSI A under LGI (Long Guard Interval long protection interval) pattern, or the data package transmission velocity of the RSSI A under SGI (the short protection interval of Short Guard Interval) pattern, if the data package transmission velocity of the RSSI A under LGI (Long Guard Interval long protection interval) pattern, then turn to step S205, if the data package transmission velocity of the RSSI A under SGI (the short protection interval of Short Guard Interval) pattern then turns to step S206.
S205, setting data packet sending speed are the data package transmission velocity of the RSSI A under SGI pattern, and 1s timer terminates.
S206, setting data packet sending speed are the data package transmission velocity of the RSSI A under LGI pattern, and 1s timer terminates.
Claims (10)
1. a WAP (wireless access point) radio frequency index testing system, is characterized in that: this test macro, under WAP (wireless access point) to be measured is operated in non-signaling pattern, is tested this WAP (wireless access point) radio-frequency (RF) index to be measured; Comprise:
Can send the data sending device of UDP message stream continuously, described data sending device is given out a contract for a project by Chariot instrument, launches via described WAP (wireless access point) to be measured the wireless carrier signal that modulation has continuous UDP message stream;
Receiving system receives wireless carrier signal by wireless network card, and the wireless link between sending and receiving device connects adjustable attenuator, by Chariot means accepts UDP message stream in described receiving system; The demodulation module of the wireless network card of described receiving system exports the radio-frequency (RF) index result of WAP (wireless access point) to be measured.
2. WAP (wireless access point) radio frequency index testing system according to claim 1, is characterized in that: the wireless network card of described receiving system is responsible for the radio-frequency (RF) index receiving UDP message stream and analytic signal.
3. WAP (wireless access point) radio frequency index testing system according to claim 1, is characterized in that: described data sending device and WAP (wireless access point) wired connection to be measured.
4. WAP (wireless access point) radio frequency index testing system according to claim 1, is characterized in that: described wireless network card measures the speed of wireless data message, error vector and power.
5. a WAP (wireless access point) radio-frequency indicator testing method, the method utilizes Chariot instrument to send continuous UDP message stream by WAP (wireless access point) to be measured to the data receiving terminal with wireless network card; It is characterized in that: comprise the following steps:
Step 1, set up data transmitting terminal and utilize link between WAP (wireless access point) to be measured and data receiving terminal;
Step 2, data receiving terminal set the pad value of the variable attenuator be connected with wireless network card;
Step 3, WAP (wireless access point) to be measured, according to the RSSI received, arrange the message transmission rate adapted, and send continuous print UDP message stream to data receiving terminal;
Step 4, data receiving terminal receive UDP message stream, by speed, error vector, the power of the wireless data message of flow rate test tool analysis bottom; Record speed, error vector, the power of wireless data message of corresponding RSSI, reception;
Step 5, change the attenuation of variable attenuator, turn to step 4, until decay is greater than or wait the value set.
6. WAP (wireless access point) radio-frequency indicator testing method according to claim 5, is characterized in that: in described step 3: WAP (wireless access point) to be measured, according to the RSSI received, arranges the message transmission rate adapted and comprises:
When starting to send, WAP (wireless access point) to be measured is determined to arrange the message transmission rate adapted according to speed and RSSI mapping table;
Then, after each change RSSI value, the RSSI A of preset time before WAP (wireless access point) to be measured obtains, check speed and RSSI mapping table, obtain the call number A that RSSI A is corresponding, determine present rate, if the speed of LGI pattern corresponding to call number A, then setting data transmission rate is the SGI pattern speed that call number A is corresponding, otherwise then setting data transmission rate is the speed of the LGI pattern that call number A is corresponding.
7. WAP (wireless access point) radio-frequency indicator testing method according to claim 6, is characterized in that: described preset time is 1 second.
8. WAP (wireless access point) radio-frequency indicator testing method according to claim 5, is characterized in that: in step 2, and the pad value arranging variable attenuator is minimal attenuation, changes decay and increase 3dB at every turn in step 5.
9. WAP (wireless access point) radio-frequency indicator testing method according to claim 8, is characterized in that: when the pad value arranging variable attenuator is minimal attenuation, WAP (wireless access point) to be measured is-29 to-27dB according to the RSSI received; The decay that variable attenuator is set be greater than or etc. the value of setting time, WAP (wireless access point) to be measured is-74 to-72dB according to the RSSI received.
10., according to described WAP (wireless access point) radio-frequency indicator testing method arbitrary in claim 5 to 9, it is characterized in that: the second described setting-up time is 4 seconds.
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| CN109257124A (en) * | 2018-09-26 | 2019-01-22 | 深圳市广和通无线股份有限公司 | The non-signaling test method of WiFi, system, computer equipment and storage medium |
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