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WO2018161379A1 - Appareil, procédé et système pour mesurer le débit d'une interface radio sans fil d'un dispositif terminal wlan - Google Patents

Appareil, procédé et système pour mesurer le débit d'une interface radio sans fil d'un dispositif terminal wlan Download PDF

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Publication number
WO2018161379A1
WO2018161379A1 PCT/CN2017/078161 CN2017078161W WO2018161379A1 WO 2018161379 A1 WO2018161379 A1 WO 2018161379A1 CN 2017078161 W CN2017078161 W CN 2017078161W WO 2018161379 A1 WO2018161379 A1 WO 2018161379A1
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Prior art keywords
wlan terminal
terminal device
throughput
wireless
tested
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PCT/CN2017/078161
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English (en)
Chinese (zh)
Inventor
全智
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深圳市中承科技有限公司
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Publication of WO2018161379A1 publication Critical patent/WO2018161379A1/fr

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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
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H04L43/0888—Throughput
    • 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
    • H04L43/12—Network monitoring probes
    • 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
    • H04L43/50—Testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H04W74/0816—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA] with collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of wireless communication system measurement technologies, and in particular, to a device, method and system for testing a wireless air interface throughput of a WLAN terminal device to be tested.
  • WLAN Wireless Local Area Network
  • IEEE 802.11a/b/g/n/ac mainly using the 2.4 GHz and 5 GHz bands, and the network scale is expanding. Therefore, it is more and more important to quickly test the performance of wireless communication terminal products and network over-the-air (OTA), especially data throughput (Throughput).
  • the air interface throughput test system usually places the WLAN terminal in the shielded anechoic chamber, completely shielded from the external environment, and the test antenna is installed in the shielded dark room, and the RF cable is used. An external wireless integrated tester is connected.
  • the traditional WLAN air interface test environment only places one WLAN terminal, and divides the total amount of data actually transmitted by the measurement time to obtain the throughput of the interface, that is, the network throughput is equivalent to the air interface throughput of the WLAN terminal.
  • This traditional test method can only measure one WLAN terminal at a time, and the uplink and downlink cannot be measured at the same time, the efficiency is low, and the testing process takes a long time.
  • the present invention provides a device, method and system for testing a wireless air interface throughput of a WLAN terminal device to be tested for simultaneous testing of single, two or more WLAN terminals. .
  • the present invention provides a wireless air interface throughput testing device for a WLAN terminal device, including a wireless integrated tester, a software control platform, and a microwave shielding darkroom, and at least one WLAN terminal device to be tested is placed in the microwave shielding.
  • the wireless integrated tester and the WLAN terminal device to be tested are connected by using a radio frequency signal, and the WLAN terminal device to be tested transmits an uplink data frame to the wireless integrated tester through a distributed contention channel access mechanism, and simultaneously
  • the wireless integrated tester participates in channel competition through the contention channel access protocol, and sends downlink data frames to each WLAN terminal device to be tested.
  • the wireless integrated tester and the software control platform are connected by a communication cable, and the software control platform is used for wireless synthesis.
  • the tester sends the meter control signal and receives the test data fed back by the wireless integrated tester to calculate the wireless air interface data throughput.
  • the wireless integrated tester includes a vector signal analyzer for performing transmitter verification and a vector signal generator for performing extended receiver test.
  • the wireless integrated tester is based on an IEEE 802.11 communication protocol.
  • the invention also provides a test method for wireless air interface throughput of a WLAN terminal device to be tested, comprising the following steps:
  • the WLAN terminal device to be tested establishes a communication connection with the wireless integrated measuring instrument through scanning, authentication and associated communication protocol;
  • the software control platform controls the wireless integrated measuring instrument to send a certain number of data frames to each WLAN terminal device to be tested, and measures downlink data throughput;
  • Each WLAN terminal to be tested transmits a certain number of data frames to the wireless integrated measuring instrument, and measures uplink data throughput;
  • the total network data traffic within the test time overhead is obtained, and the wireless air interface data throughput is calculated.
  • the WLAN terminal device to be tested is placed in a microwave shielding dark room.
  • downlink data throughput is measured by:
  • the WLAN terminal For each data frame that is correctly received by the WLAN terminal to be tested, the WLAN terminal returns an ACK frame to the wireless integrated tester as a confirmation that the data frame is correctly received within a short time frame interval; for data that is not correctly received Frames, wireless integrated meters will not receive ACK frames within the short time frame interval, and data frames that are not correctly received will be retransmitted until they are received correctly.
  • the downlink data throughput is measured by:
  • the data frame sent by the WLAN terminal to be tested to the wireless integrated measuring instrument avoids collision and mutual interference by using a carrier channel multiple access mechanism with collision avoidance through a distributed competitive channel access mechanism, and simultaneously, each wireless integrated
  • the data frame correctly received by the tester, the WLAN terminal device to be tested corresponding to the data frame receives an ACK frame as confirmation in the short time frame interval.
  • the invention also provides a test system for wireless air interface throughput of a WLAN terminal device to be tested, comprising:
  • a communication connection module configured to establish a communication connection between the WLAN terminal device to be tested and the wireless integrated measuring instrument by using a scanning, authentication and associated communication protocol;
  • a downlink data throughput test module configured to be used by the software control platform to control the wireless integrated tester to send a certain number of data frames to each WLAN terminal device to be tested, and measure downlink data throughput;
  • An uplink data throughput test module configured to send each WLAN terminal to be tested to a wireless integrated measuring instrument to send a certain number of data frames, and measure uplink data throughput;
  • the processing module is configured to obtain the total network data traffic during the test period according to the downlink data throughput and the uplink data throughput, and calculate the wireless air interface data throughput.
  • the device for testing the wireless air interface throughput of the WLAN terminal device to be tested comprises at least one WLAN terminal device to be tested placed in the microwave shielding dark room by including a wireless integrated tester, a software control platform, and a microwave shielding darkroom.
  • the wireless integrated tester and the WLAN terminal device to be tested are connected by using a radio frequency signal, and the WLAN terminal device to be tested transmits an uplink data frame to the wireless integrated tester through a distributed competitive channel access mechanism, and the wireless comprehensive test is simultaneously performed.
  • the device participates in channel competition through the contention channel access protocol, and sends downlink data frames to each WLAN terminal device to be tested.
  • the wireless integrated tester and the software control platform are connected by a communication cable, and the software control platform is used to send the wireless integrated tester.
  • the meter controls the signal and receives the test data fed back by the wireless integrated tester to calculate the wireless air interface data throughput, so that the present invention can simultaneously test the air interface throughput of single, two or more devices under test. More efficient than the measurement method, the test process takes a short time
  • the method for testing the wireless air interface throughput of the WLAN terminal device to be tested comprises the steps of: the WLAN terminal device to be tested establishes a communication connection with the wireless integrated measuring instrument through scanning, authentication and associated communication protocol; the software control platform controls the wireless The integrated measuring instrument sends a certain number of data frames to each WLAN terminal device to be tested, and measures downlink data throughput; each WLAN terminal to be tested transmits a certain number of data frames to the wireless integrated measuring instrument, and measures uplink data throughput; According to the downlink data throughput and the uplink data throughput, the total network data flow during the test time is obtained, and the wireless air interface data throughput is calculated, so that the present invention can perform air interface throughput for single, two or more devices under test. Simultaneous testing is performed, and the efficiency is high compared to the measurement method, and the testing process takes a short time.
  • the test system for the wireless air interface throughput of the WLAN terminal device to be tested comprises: a communication connection module, configured to establish a communication connection between the WLAN terminal device to be tested and the wireless integrated measuring instrument through scanning, authentication and associated communication protocol a downlink data throughput test module for controlling a wireless integrated tester to send a certain number of data frames to each WLAN terminal device to be tested by the software control platform, and measuring downlink data throughput; and an uplink data throughput test module for The WLAN terminals to be tested are sent to the wireless integrated measuring instrument to transmit a certain number of data frames to measure the uplink data throughput; and the processing module is configured to acquire the network data in the test time according to the downlink data throughput and the uplink data throughput.
  • the total traffic, and calculate the wireless air interface data throughput so that the present invention can simultaneously test the air interface throughput of single, two or more devices under test, compared with the measurement method, the efficiency is high, and the test process takes a short time. .
  • FIG. 1 is a schematic structural diagram of an example of a device for testing a wireless air interface throughput of a WLAN terminal device according to the present invention
  • FIG. 2 is a flowchart of an example of a method for testing a wireless air interface throughput test of a WLAN terminal device according to the present invention
  • FIG. 3 is a block diagram showing a system structure of an example provided by a test system for wireless air interface throughput of a WLAN terminal device according to the present invention
  • FIG. 4 is a schematic diagram of a packet head overhead structure of different sublayers of a wireless network
  • Figure 5 (a) is a schematic diagram of the competition mechanism in the CSMA/CA mode
  • Figure 5(b) is a schematic diagram of the competition mechanism in the RTS/CTS mode.
  • a device for testing a wireless air interface throughput of a WLAN terminal device includes The wireless integrated tester, the software control platform, and the microwave shielding darkroom, the at least one WLAN terminal device to be tested is placed in the microwave shielding darkroom, and the wireless integrated tester and the WLAN terminal device to be tested are connected by using radio frequency signals.
  • the WLAN terminal device to be tested transmits an uplink data frame to the wireless integrated tester through a distributed contention channel access mechanism, and the wireless integrated tester participates in channel competition through the contention channel access protocol, and sends the data to each WLAN terminal device to be tested.
  • the downlink data frame, the wireless integrated tester and the software control platform are connected by a communication cable, and the software control platform is configured to send the instrument control signal to the wireless integrated tester, and receive the test data fed back by the wireless comprehensive tester to calculate the wireless air. Interface data throughput.
  • the wireless integrated tester includes a vector signal analyzer and a vector signal generator, a vector signal analyzer is used for transmitter verification, and a vector signal generator is used for extended receiver testing.
  • the wireless integrated tester is based on an IEEE 802.11 communication protocol.
  • FIG. 2 is a flowchart of an example of a method for testing a wireless air interface throughput of a WLAN terminal device according to the present invention. As shown in FIG. 2, the method includes the following steps:
  • Step 21 The WLAN terminal device to be tested establishes a communication connection with the wireless integrated measuring instrument through scanning, authentication, and associated communication protocol;
  • Step 22 The software control platform controls the wireless integrated measuring instrument to send a certain quantity to each WLAN terminal device to be tested. Data frame, measuring downlink data throughput;
  • Step 23 Each WLAN terminal to be tested sends a certain number of data frames to the wireless integrated measuring instrument, and measures uplink data throughput;
  • Step 24 Obtain total network data traffic within the test time overhead according to the downlink data throughput and the uplink data throughput, and calculate a wireless air interface data throughput.
  • the WLAN terminal device to be tested is placed in a microwave shielding darkroom.
  • downlink data throughput is measured by:
  • the WLAN terminal For each data frame that is correctly received by the WLAN terminal to be tested, the WLAN terminal returns an ACK frame to the wireless integrated tester as a confirmation that the data frame is correctly received within a short time frame interval; for data that is not correctly received Frames, wireless integrated meters will not receive ACK frames within the short time frame interval, and data frames that are not correctly received will be retransmitted until they are received correctly.
  • step 23 the downlink data throughput is measured by:
  • the data frame sent by the WLAN terminal to be tested to the wireless integrated measuring instrument avoids collision and mutual interference by using a carrier channel multiple access mechanism with collision avoidance through a distributed competitive channel access mechanism, and simultaneously, each wireless integrated
  • the data frame correctly received by the tester, the WLAN terminal device to be tested corresponding to the data frame receives an ACK frame as confirmation in the short time frame interval.
  • a test system for wireless air interface throughput of a WLAN terminal device includes:
  • the communication connection module 31 is configured to establish a communication connection between the WLAN terminal device to be tested and the wireless integrated measuring instrument by using a scanning, authentication, and associated communication protocol;
  • the downlink data throughput test module 32 is configured to, by the software control platform, control the wireless integrated tester to send a certain number of data frames to each WLAN terminal device to be tested, and measure downlink data throughput;
  • the uplink data throughput test module 33 is configured to send each WLAN terminal to be tested to the wireless integrated measuring instrument to send a certain number of data frames, and measure uplink data throughput;
  • the processing module 34 is configured to obtain total network data traffic during the test period according to the downlink data throughput and the uplink data throughput, and calculate a wireless air interface data throughput.
  • a wireless integrated tester based on the IEEE 802.11 communication protocol standard records the MAC address of each WLAN terminal after the air interface is associated with a plurality of WLAN terminals. These WLAN terminals are connected through a distributed contention channel
  • the incoming mechanism that is, CSMA/CA sends uplink data frames to the wireless integrated tester, and the wireless integrated tester participates in channel competition through the protocol, and transmits downlink data frames to each WLAN terminal.
  • the wireless integrated tester and multiple WLAN terminals detect channel idle time within a DCF frame interval, and each selects a random backoff time to reduce the possibility of collision of the transmitted data frame, that is, distributed. Coordination function.
  • Table 1 lists some of the key metrics involved throughout the calculation process.
  • Table 1 calculates the key indicators of throughput:
  • T SIFS Short time frame spacing T DIFS DCF frame spacing CW min Minimum backoff window time
  • T PHYhdr Physical layer preamble and header information transmission time T ACK ACK transmission time
  • T PSDU Transmission time of a PSDU unit ⁇ Wireless signal propagation delay time T RTS RTS transmission time T CTS CTS transmission time T BO Backoff time
  • R PHY Physical layer transmission rate L MSDU MAC-PDU size (in bytes)
  • the IEEE 802.11 communication protocol standard covers the MAC layer of the media access control and the physical PHY layer.
  • a protocol data unit in the PHY layer is defined as the length of the transport unit containing the PHY header overhead in the layer, that is, the PPDU, and one service data unit is defined as the size of the payload unit in the layer, that is, Payload, and the payload is the upper layer.
  • PPDU a protocol data unit in the PHY layer
  • FIG. 4 is a schematic diagram of a packet head overhead structure of different sub-layers of a wireless network, which shows a structure of a packet and an overhead during a process of forwarding a data frame.
  • Figure 5(a) is a schematic diagram of the competition mechanism in CSMA/CA mode.
  • the WLAN terminal can also select the transmission mode of RTS/CTS to avoid hidden nodes.
  • Figure 5(b) is a schematic diagram of the competition mechanism in RTS/CTS mode, which describes the process of data frame delivery.
  • the maximum throughput bits per second
  • all time overheads in each sublayer are first converted into a common time unit.
  • the service data unit (SDU) of the MAC layer that is, the MSDU
  • SDU service data unit
  • the MSDU is segmented by using a similar time division multiplexing method, and then an effective maximum throughput calculation model is established for the payload:
  • T PPDU is all the time overhead required to transmit the PPDU of the MSDU, including listening to the idle channel DCF
  • the frame spacing begins, competing for transmission opportunities during the backoff time, until the transmission of the entire data frame, and receipt of an ACK acknowledgement.
  • the time overhead of the T MSDU includes the following specific contents:
  • T PPDU T DIFD +T BO +T PHYHfr +T PSDU +T SIFS +T ACK (2)
  • T PHYhdr is a fixed time
  • PSDU transmission time T PSDU L PSDU / R PHY is equal to PSDU length (bits) divided by physical layer transmission rate R PHY .
  • R PHY varies with different modulation and demodulation techniques, see Table 1. If the transmission mode of RTS/CTS is adopted, the calculation method of T PPDU is as follows:
  • T PPDU T DIFS +T BO +T RTS +T SIFS +T CTS +T SIFS +T PHYhdr +T PSDU +T SIFS +T ACK (3)
  • T PPDUs are composed of these delays, overheads, and valid service data units.
  • Control frames such as RTS, CTS, ACK, use the lowest rate 1 Mbps transmission in the 2.4 GHz band and 6 Mbps in the 5 GHz band, which is for the backward compatibility of the 802.11 standard to ensure different terminals during the detection process. There is good compatibility between them, which is also in line with the needs of actual engineering.
  • CW Contention Window
  • CW min the size of the minimum contention window in a WLAN with only one WLAN terminal, because there is no contention conflict, CW is always at a minimum.
  • T BO backoff time
  • the wireless integrated tester can calculate the uplink and downlink data throughput of each WLAN terminal according to the source MAC address and the target MAC address in the MAC layer header information of the data frame.
  • the wireless integrated tester sends M k data frames to the kth WLAN terminal, and the downlink throughput of the WLAN terminal can be calculated by dividing the total transmitted payload data by the total time overhead.
  • the upstream air interface throughput of this WLAN terminal can also be calculated using the above formula. Therefore, the data throughput of the network can be converted into the uplink and downlink data throughput of each WLAN terminal through calculation.
  • the wireless integrated tester sends M k data frames to the kth WLAN terminal, wherein the number of lost or erroneous data frames is N k , then the downlink data throughput of the WLAN terminal can be expressed as:
  • the uplink throughput of the WLAN terminal can also be calculated using equation (5).

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

L'invention concerne un appareil, un procédé et un système pour mesurer le débit d'une interface radio sans fil d'un dispositif terminal WLAN. L'appareil comprend un testeur complet sans fil, une plateforme de commande de logiciel et une pièce sombre de protection contre les micro-ondes. Au moins un dispositif terminal WLAN à tester est placé dans la pièce sombre de protection contre les micro-ondes ; le testeur complet sans fil et le dispositif terminal WLAN à tester sont en liaison de communication au moyen de signaux radiofréquence ; le dispositif de terminal WLAN à tester envoie une trame de données de liaison montante au testeur complet sans fil au moyen d'un mécanisme d'accès à un canal de contention distribué, et en même temps, le testeur complet sans fil participe à une contention de canal au moyen d'un protocole d'accès à un canal de contention et envoie une trame de données de liaison descendante à chaque dispositif de terminal WLAN à tester ; le testeur complet sans fil est relié à la plateforme de commande de logiciel au moyen d'un câble de communication, de façon à calculer le débit de données de l'interface radio sans fil. Au moyen de la présente invention, le débit d'interfaces air d'un ou deux ou plusieurs dispositifs à tester peut être mesuré simultanément ; le procédé de mesure est efficace, et le temps consommé pendant un processus de mesure est court.
PCT/CN2017/078161 2017-03-06 2017-03-24 Appareil, procédé et système pour mesurer le débit d'une interface radio sans fil d'un dispositif terminal wlan WO2018161379A1 (fr)

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CN201710128979.4A CN106789451A (zh) 2017-03-06 2017-03-06 Wlan终端设备无线空中接口吞吐量的测试装置、方法及系统
CN201710128979.4 2017-03-06

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WO2019071436A1 (fr) * 2017-10-10 2019-04-18 深圳传音通讯有限公司 Système de test automatisé
CN112566175B (zh) * 2020-12-03 2024-08-09 深圳信息通信研究院 无线物联网终端设备mac层共存机制的测试方法及装置
CN113542736A (zh) * 2021-07-14 2021-10-22 南京熊猫电子股份有限公司 一种用于智能电视wifi吞吐量的测试方法及系统
CN114793302B (zh) * 2022-03-09 2022-10-14 广州狮威能源技术有限公司 一种即时插拔的无线传输计量分析系统

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