CN104410984B - A kind of wireless access point radio frequency index testing system and test method - Google Patents
A kind of wireless access point radio frequency index testing system and test method Download PDFInfo
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- CN104410984B CN104410984B CN201410690948.4A CN201410690948A CN104410984B CN 104410984 B CN104410984 B CN 104410984B CN 201410690948 A CN201410690948 A CN 201410690948A CN 104410984 B CN104410984 B CN 104410984B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
Abstract
The present invention provides a kind of wireless access point radio frequency index testing system and test method, which tests the wireless access point RF index to be measured in the case where wireless access point to be measured is operated in non-signaling pattern；Including：The data sending device of UDP message stream can be continuously transmitted, by Chariot instruments, the data sending device is modulated with the carrier signal of continuous UDP message stream by the wireless access point to be measured transmitting；Receive by the wireless interface module to be responsible for the reception device received, between Radio Link is sent and received on adjustable attenuator is set, flow reception instrument Chariot is provided in reception device；The RF index of reception device, that is, wireless interface module output wireless data packet.This method uses non-signaling mode.By saving the DUT control terminal roles of data sending device in the present invention, the RF index test of full rate can easily be realized.The packet sending speed of DUT is intelligent, can be according to self adjustment packet sending speed of the pad value of passage.
Description
Technical field
The present invention relates to wireless access point RF index testing field, more particularly to a kind of wireless access point RF index is surveyed
Non-signaling pattern during examination.
Background technology
Traditional wireless access point radio frequency testing, is all the method using signaling mode test rate, and test networking figure is joined
Fig. 1 is examined, wireless access point DUT to be measured is controlled using a computer PC2, in addition, there is wireless network card using one
Computer PC1 tested.
Test method is as follows：
1st, access point to be measured（That is DUT）It is operated in signaling test pattern, the upper DUT of wireless network card connection on PC1.
2nd, PC2 is as DUT control terminals, by cable network mode DUT is controlled to send the data packet of special speed, such as
The data packet of 54Mbps rates.
3rd, PC1 aids in software analysis data bag with wireless network card, obtains the EVM of the rate message as analysis end is received
The RF indexes value such as (error vector), power completes test verification work.
Signaling mode test there are problems that needing to improve as follows：
1）, each family wireless access point（DUT）, lack unified control instruction specification, it is necessary on test computer PC2
Develop different control softwares.
2）, need control computer PC1 as DUT control terminals, by cable network Method of Signaling Control, control wirelessly connects
Access point sends the message of special speed, increases the complexity of system.
The content of the invention
The purpose of the present invention is to solve traditional signaling mode test defect, promote testing efficiency.Wireless access is provided
The non-signaling pattern test method of point RF index.
The technical scheme is that：A kind of wireless access point radio frequency index testing system, the test system is in nothing to be measured
Line access point is operated under non-signaling pattern, which is tested；Including：It can continuously transmit
The data sending device of UDP message stream, by Chariot instruments, the data sending device passes through described to be measured wireless
Access point emits the carrier signal for being modulated with continuous UDP message stream；It receives by the wireless interface module to be responsible for what is received
Reception device sets adjustable attenuator in described send and receive between Radio Link, is provided in the reception device
Flow receives instrument Chariot；The RF index of the reception device, that is, wireless interface module output wireless data packet.
By saving the DUT control terminal roles of data sending device in the present invention, the radio frequency of full rate can easily be realized
Index test.The packet sending speed of DUT is intelligent, can be according to self adjustment packet sending speed of the pad value of passage.
In the wireless access point radio frequency index testing system of the present invention, it is preferable that：The reception device it is wireless
Receiving module is the wireless network card with wireless access point wireless connection to be measured.It is described with wireless access point wired connection to be measured.
Rate, error vector and the power of the RF analysis tool analysis wireless data stream packet.
The present invention also provides a kind of wireless access point radio-frequency indicator testing method, this method utilizes a data sending terminal
Continuous UDP message stream is sent to the data receiving terminal with wireless network card by wireless access point to be measured；Comprise the following steps：
Step 1 establishes data sending terminal using the link between wireless access point to be measured and data receiving terminal；
The pad value for the variable attenuator that step 2, data receiving terminal setting are connected with wireless network card；
Step 3, wireless access point to be measured set adaptable message transmission rate, to data according to the RSSI received
It receives terminal and sends continuous UDP message stream；
Step 4, data receiving terminal receive UDP message the first setting time of stream, and wireless data is analyzed by wireless network card
Rate, error vector, power；Record corresponding RSSI, the rate of the UDP message received, error vector, power；
Step 5, the attenuation for changing variable attenuator turn to step 4, until decaying more than or equal to the value of setting.
Preferred method includes：In the step 3：Wireless access point to be measured is mutually fitted according to the RSSI received, setting
The message transmission rate answered includes：
When starting to send, wireless access point to be measured determines to set adaptable data transmission according to rate and RSSI mapping tables
Rate；
Then, after changing RSSI value every time, the RSSI A of the second setting time, check speed before wireless access point to be measured obtains
Rate and RSSI mapping tables obtain the corresponding call number A of RSSI A, present rate are determined, if the corresponding LGI moulds of call number A
The rate of formula then sets message transmission rate as the corresponding SGI patterns rates of call number A, conversely, then setting message transmission rate
For the rate of the corresponding LGI patterns of call number A.
The present invention is described in more detail with reference to specific embodiment.
Description of the drawings
Fig. 1 is to test system under signaling test pattern.
Fig. 2 is the test system under the non-signaling mode of the present invention.
Fig. 3 is 1 flow chart of the embodiment of the present invention.
Specific embodiment
Embodiment 1, as shown in Fig. 2, be a kind of wireless access point radio frequency index testing system structure chart of the present embodiment, it should
Chip solution of the system based on MTK wireless access point provides the rate algorithms under the non-signaling test pattern and realizes wireless
Access point RF index is tested.The test system is in the case where wireless access point DUT to be measured is operated in non-signaling pattern, to the nothing to be measured
Line access point DUT RF indexes are tested；The data sending device PC2 of UDP message stream, data sending device can be continuously transmitted
PC2 is modulated with the carrier signal of continuous UDP message stream by wireless access point DUT to be measured transmittings；PC2 and DUT uses wired company
It connects, PC2 only sends data using DUT.
In addition, also reception is modulated with connecing for the carrier signal of continuous UDP message stream by wireless access point DUT to be measured transmittings
Receiving apparatus PC1, PC1 are connected by the wireless network card being mounted above with DUT wireless communications, and being additionally provided on wireless network card can
Controlled attenuator, the attenuation of adjustable attenuator can make RSSI (the Received Signal that DUT is sent in network interface card communication link
Strength Indication received signals intensity indicates) value is adjusted to -29dB to -27dB from -74 to -72dB.
Installation flow rate test instrument Chariot is also needed in systems.
In the present embodiment, the non-signaling pattern test method of wireless access point is as follows, and test networking figure refers to such as Fig. 2：
1st, access point DUT to be measured is operated in non-signaling test pattern, the upper DUT of wireless network card connection on PC1；
2nd, the general flow rate test instrument Chariot of PC1 and PC2 persistently run the UDP message stream in PC2 to PC1 directions；
In the present embodiment, testing tool Chariot is a network application software performance testing tool, and the owner should be
NetIQ, using NetIQ Chariot v5.4 versions in the present embodiment.
3rd, DUT is connected with the wireless network card on PC1 by adjustable attenuator, PC1 control adjustable attenuators, using 3dB as step
Decay into adjustment, after being often adjusted to a pad value, capture the data message of the corresponding pad value.Then the speed of message is analyzed
The RF indexes value such as rate, EVM, Power completes test verification work.
The test method of non-signaling pattern has following features：
The DUT control terminal roles of PC2 are saved, can easily realize the RF index test of full rate.
The packet sending speed of DUT is intelligent, can be according to self adjustment packet sending speed of the pad value of passage.
Wireless access point will support non-signaling pattern：A data packet packet sending speed wirelessly driven is mainly designed to calculate
Method enables wireless access point to travel through the rate set of all supports automatically.We begin to how research designs such one below
Kind algorithm.
The rate algorithms of the non-signaling pattern of wireless access point and the implementation method based on MTK schemes：
1st, the data package transmission velocity algorithm of traditional signaling message pattern：The rate selection algorithm that wireless access point data packet is sent
It is determined by following 2 parameters：
1）Data packet packet loss per second（PER）
2）Received signal intensity (RSSI)：The current signal strength of the wireless network card detected.
Algorithm basic principle：Timer detects the PER and RSSI that the data packet of upper one second is sent, and determines this report given out a contract for a project
Literary rate.
The algorithm determines substantially to promote giving out a contract for a project for DUT that can automatically travel through simply by external condition is changed
All rate sets.
2, the present embodiment newly proposes a simple algorithm therefore.The data package transmission velocity algorithm of non-signaling pattern, with MTK
Exemplified by 2*2 11n wireless chip schemes：
Assuming that wireless access point is operated in 11n patterns in advance, the rate timer wirelessly driven detects the reception of upper one second
Signal strength RSSI average values only according to RSSI and Rate mapping relation table (such as table 1), select this suitable rate to send number
According to bag.
Since RSSI is that external condition can be fixed, in addition mapping relations are also fixed, then DUT is operated in the non-signaling pattern
When, packet sending speed can be just automatically selected according to RSSI to a fixed rate.It is well positioned to meet wanting for non-signaling test method
It asks.
Table 1
The basic flow chart that the algorithm is realized is as shown in figure 3, specifically include following steps：
S1, PC1 high speed variable attenuators attenuation check from link to DUT initial RSSI for-
28dBm。
S2, DUT automatic rate adjustment algorithm come into force process.
S201, setting 1s rate timers triggers.
The RSSI A of 1s before S202, acquisition, (when just starting to send data, just using current RSSI as RSSI A).
S203, RSSI mapping tables acquisition index A (Index A) is looked into.
S204, judge current data transmission rate under LGI (Long Guard Interval long protection intervals) pattern
RSSI A under data package transmission velocity or SGI (Short Guard Interval short protection intervals) pattern of RSSI A
Data package transmission velocity, if the data of the RSSI A under LGI (Long Guard Interval long protection intervals) pattern
Packet sending speed then turns to step S205, if under SGI (Short Guard Interval short protection intervals) pattern
The data package transmission velocity of RSSI A then turns to step S206.
S205, data package transmission velocity of the data package transmission velocity for the RSSI A under SGI patterns, 1s timer knots are set
Beam.
S206, data package transmission velocity of the data package transmission velocity for the RSSI A under LGI patterns, 1s timer knots are set
Beam.
Claims (8)
1. a kind of wireless access point radio-frequency indicator testing method, this method passes through wireless access point to be measured using Chariot instruments
Continuous UDP message stream is sent to the data receiving terminal with wireless network card；It is characterized in that：Comprise the following steps：
Step 1 establishes data sending terminal using the link between wireless access point to be measured and data receiving terminal；
The pad value for the variable attenuator that step 2, data receiving terminal setting are connected with wireless network card；
Step 3, wireless access point to be measured set adaptable message transmission rate, to data receiver according to the RSSI received
Terminal sends continuous UDP message stream；In the step, wireless access point to be measured is set adaptable according to the RSSI received
Message transmission rate includes：
When starting to send, wireless access point to be measured determines to set adaptable data transmission speed according to rate and RSSI mapping tables
Rate；
Then, after changing RSSI value every time, the RSSI A of given time, check rate and RSSI before wireless access point to be measured obtains
Mapping table obtains the corresponding call number A of RSSI A, determines present rate, if the rate of the corresponding LGI patterns of call number A,
Message transmission rate is then set for the corresponding SGI patterns rates of call number A, conversely, it is call number A then to set message transmission rate
The rate of corresponding LGI patterns；
Step 4, data receiving terminal receive UDP message stream, pass through the wireless data message of flow rate test tool analysis bottom
Rate, error vector, power；Record corresponding RSSI, the rate of the wireless data message received, error vector, power；
Step 5, the attenuation for changing variable attenuator turn to step 4, until decaying more than or equal to the value of setting.
2. wireless access point radio-frequency indicator testing method according to claim 1, it is characterised in that：The given time
For 1 second.
3. wireless access point radio-frequency indicator testing method according to claim 1, it is characterised in that：In step 2, set
The pad value of variable attenuator is minimal attenuation, and change attenuation in step 5 increases 3dB every time.
4. wireless access point radio-frequency indicator testing method according to claim 3, it is characterised in that：Variable attenuator is set
Pad value be minimal attenuation when, wireless access point to be measured according to the RSSI received be -29 to -27dB；Variable attenuation is set
When the attenuation of device is more than or equal to the value set, wireless access point to be measured is -74 to -72dB according to the RSSI received.
5. a kind of system for being used to implement wireless access point radio-frequency indicator testing method described in claim 1, it is characterised in that：
The test system tests the wireless access point RF index to be measured in the case where wireless access point to be measured is operated in non-signaling pattern；
Including：
The data sending device of UDP message stream can be continuously transmitted, the data sending device is sent out by Chariot instruments
Bag is modulated with the wireless carrier signal of continuous UDP message stream via the wireless access point to be measured transmitting；
Reception device receives wireless carrier signal by wireless network card, and being connect on the Radio Link between sending and receiving device can
Controlled attenuator passes through Chariot instruments in the reception device and receives UDP message stream；The wireless network of the reception device
The demodulation module of card exports the RF index result of wireless access point to be measured.
6. system according to claim 5, it is characterised in that：The wireless network card of the reception device is responsible for receiving UDP
The RF index of data flow and signal Analysis.
7. system according to claim 5, it is characterised in that：The data sending device has with wireless access point to be measured
Line connects.
8. system according to claim 5, it is characterised in that：The speed of the wireless network card measurement wireless data message
Rate, error vector and power.
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| CN107396392B (en) * | 2017-07-26 | 2020-09-08 | 深圳市共进电子股份有限公司 | Radio frequency index testing method, device, equipment and storage medium of wireless access point |
| CN108093444B (en) * | 2018-02-23 | 2020-06-26 | Oppo广东移动通信有限公司 | Wireless network transmission rate control method and device, terminal equipment and storage medium |
| CN109257124B (en) * | 2018-09-26 | 2022-04-15 | 深圳市广和通无线股份有限公司 | WiFi non-signaling test method, system, computer equipment and storage medium |
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| US7323884B2 (en) * | 2005-12-30 | 2008-01-29 | Psion Teklogix Inc. | RF test chamber |
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| CN101184006A (en) * | 2007-12-07 | 2008-05-21 | 深圳国人通信有限公司 | Test method and system for WLAN equipment index |
| CN103546345A (en) * | 2013-10-24 | 2014-01-29 | 广东欧珀移动通信有限公司 | Method and device for testing performance of communication equipment |
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