CN103716855A - Data transmission method of wireless workstation of intelligent television - Google Patents

Data transmission method of wireless workstation of intelligent television Download PDF

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Publication number
CN103716855A
CN103716855A CN201310749378.7A CN201310749378A CN103716855A CN 103716855 A CN103716855 A CN 103716855A CN 201310749378 A CN201310749378 A CN 201310749378A CN 103716855 A CN103716855 A CN 103716855A
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wireless
access point
wap
wireless access
network card
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张国良
李强
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Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Leshi Zhixin Electronic Technology Tianjin Co Ltd
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Abstract

The invention relates to the field of wireless communication, and provides a data transmission method of a wireless workstation of an intelligent television. The data transmission method is characterized in that the wireless workstation comprises a wireless network adapter and is characterized by comprising the following steps that the wireless network adapter is used for sending wireless detection request frames to all surrounding available channels so that the position of wireless access points can be scanned; detection response frames sent by the wireless access points to the wireless network adapter are received; according to the signal strength and transmission quality of the detection response frames, the positions of the wireless access points are determined; data are sent in the directions of the positions, and therefore data communication with the wireless access points is conducted. The data transmission method effectively improves the transmission quality of wireless data and increases transmission speed.

Description

A kind of data transmission method of intelligent television wireless stations and device
Technical field
The present invention relates to wireless communication field, particularly a kind of data transmission method of intelligent television wireless stations and device.
Background technology
Wireless network is the product that computer networking technology and wireless communication technology mutually combine, and utilizes radio network technique, and people can be easily with wireless mode interconnection network equipment, at any time, accesses network resource everywhere.WLAN (wireless local area network) (Wireless Local Area Network, WLAN) utilization family can create wireless connections in local scope, for all, is not easy to lay the place of cable or for strengthening existing cable LAN.At present, the technical standard that Wireless LAN Equipments adopts mainly contains IEEE 802.11 series, IrDA (Infrared Data Association) and bluetooth etc.IEEE 802.11 wireless networks, since it comes out, have obtained widespread deployment and application, have good commercial value and application prospect widely.
The principal element that affects at present the transmission rate of Wireless Communication Equipment is that wireless signal disturbs; wireless transmitting device of the prior art is the scope to 360 degree by radio-wave radiation; while thering is a plurality of wireless transmitting device in Yi Ge community, usually can there is cochannel and disturb and adjacent-channel interference.This interference tends to cause packet packet loss phenomenon to occur, and has reduced the performance of cordless communication network, has affected wireless transmission speed, how can concentrate radio wave energy, strengthen signal quality, improve transmission rate, be the hot issue of wireless communication field always.
Summary of the invention
In order to solve existing wireless communications technology because signal disturbs the low technical problem of transmission rate causing, the invention provides a kind of data transmission method of intelligent television wireless stations, it is characterized in that, described wireless stations comprises a wireless network card, it is characterized in that, said method comprising the steps of:
Described wireless network card towards periphery all available channels sends wireless exploration claim frame, so that the position of scanning WAP (wireless access point);
Receive the probing response frame that described WAP (wireless access point) sends to described wireless network card;
According to the signal strength signal intensity of described probing response frame and transmission quality, determine the position at described WAP (wireless access point) place;
To described locality, send data, to carry out data communication with described WAP (wireless access point).
Preferably, described wireless network card towards periphery all available channels sends wireless exploration claim frame, to scan the step of the position of WAP (wireless access point), comprise,
The antenna of described wireless network card be take fixed angle as unit is to a direction rotation, the position of 360 degree scanning WAP (wireless access point).
Preferably, the antenna of described wireless network card is at every turn with after fixed angle rotation, and the sector region direction forming to this fixed angle sends probe request, so that the position of scanning WAP (wireless access point).
Preferably, described fixed angle is 30 degree.
Preferably, after the described fixed angle of the each rotation of the antenna of described wireless network card, after the scheduled time of pausing, continue rotation.
Preferably, described wireless network card towards periphery all available channels send wireless exploration claim frames, to before the step of the position of scanning WAP (wireless access point), also comprise,
Described wireless stations is the scanning area of take within the scope of 360 degree that described wireless network card is the center of circle, and take the anglec of rotation unit of described wlan card antenna is unit, is divided in advance a plurality of subregions;
The step of the probing response frame that the described WAP (wireless access point) of described reception sends to described wireless network card comprises,
Take described subregion as unit reception probing response frame.
Preferably, describedly according to the signal strength signal intensity of described probing response frame and transmission quality, determine that the step of the position of described WAP (wireless access point) comprises, the all probing response frames that receive from described subregion are packaged into a probe response packets, according to the signal strength signal intensity of each probe response packets, determine the position of described WAP (wireless access point).
Preferably, describedly according to the signal strength signal intensity of described probing response frame and transmission quality, determine that the step of the position at described WAP (wireless access point) place comprises:
The subregion corresponding to probe response packets of returned signal strength signal intensity maximum is defined as to the position at WAP (wireless access point) place;
Describedly to described locality, send data, so that the step of carrying out data communication with described WAP (wireless access point) comprises:
To this subregion, send data, to carry out data communication with described WAP (wireless access point).
Preferably, the direction of rotation of described wireless network card is clockwise direction or counter clockwise direction.
The present invention also provides a kind of data transmission device of intelligent television wireless stations, it is characterized in that, described wireless stations comprises a wireless network card, it is characterized in that, described device comprises with lower unit:
Transmitting element, for described wireless network card towards periphery all available channels send wireless exploration claim frames so that the position of scanning WAP (wireless access point);
Receiving element, the probing response frame sending to described wireless network card for receiving described WAP (wireless access point);
Position determination unit, for determining the position at described WAP (wireless access point) place according to the signal strength signal intensity of described probing response frame and transmission quality;
Communication unit, for sending data to described locality, to carry out data communication with described WAP (wireless access point).
The present invention is by signal strength signal intensity and the transmission quality of judgement wireless exploration response frame, and the position of positioned radio access point, has realized high-precision localization method, especially, scanning area is divided into several subregions, can makes to locate error rate low, locating speed is fast, has reduced location cost; Simultaneously, after having determined the position of WAP (wireless access point), only the specific region to its place sends data, wireless signal transmission equipment 360 degree broadcast wireless signals in the prior art comparing, directive sending is because range of transmission is narrow, wireless transmission energy increases, and has effectively improved the transmission quality of wireless data, has improved transmission rate.
accompanying drawing explanation
Fig. 1 is the method flow diagram of embodiment mono-;
Fig. 2 is the device architecture figure of embodiment bis-.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
IEEE 802.11 standard definitions the equipment of two types: a kind of wireless stations (Station) that is called, also can be described as wireless client, conventionally by computing equipment movably, such as notebook computer, palmtop computer, personal digital assistant, WIFI(wireless fidelity) mobile phone etc., add lastblock wireless network card to form; Another kind is called WAP (wireless access point), is also wireless aps (Access Point).Wireless aps is the equipment of data receiver and forwarding of being responsible in network, is generally positioned over fixed position and can be connected to cable LAN.
The data transmission method of the described intelligent television wireless stations of the embodiment of the present invention and device can adopt following software and hardware to realize:
Hardware is realized:
Wireless stations in wireless access point AP (Access Point) and intelligent television is all equipped with:
1、CPU(Central?Processing?Unit):?FreescaleMPC8272VRTIE/450M;
2, miniPCI wireless network card interface.
3, wireless network card: the U.S. 2.4GHz of UBIQUITI company wireless network card, the miniPCI interface of 802.11b/g agreement, the transmitting power of setting is 17dBm, is furnished with the omnidirectional antenna of 5dBi gain.
Software is realized:
1, wireless stations operating system: linux-2.4.26;
2, WLAN Device Driver: MADWiFi(Multimode Atheros Driver for WiFi);
MADWiFi is a WLAN Device Driver under Linux, based on the chip design of Atheros series wireless network card, MADWiFi becomes wireless network card can, by one of the Linux system identification common network equipment, can to it, to be configured with instruments such as ifconfig.
With reference to Fig. 1, show the data transmission method of a kind of intelligent television wireless stations of the present invention, specifically comprise the following steps:
S101, described wireless network card towards periphery all available channels send wireless exploration claim frame, so that the position of scanning WAP (wireless access point);
The regular driver sweep program of wireless stations, after driver sweep program, the wireless network card of wireless stations is broadcast transmission probe requests thereby (probe request) frame on each available channel, and the AP that receives explore frame sends probe response (probe response) frame to work station.WLAN Device Driver can be carried out active scan process, at each channel, sends request respectively frame, then waits for the feedback of AP around.
In above-mentioned scanning imaging system, can use iwlist scanning command execution scanning process.This command description is as follows:
(1) call scan_restart function, timer is set, it is scan_next that overtime function is set.
(2) first scan_next function checks whether current scanning channel has been last channel, and if it is the end of scan, reverts to scanning channel before by network interface card channel; Otherwise carry out next step.
(3) call change_channel function, network interface card channel is set to current next channel.
(4) call ieee80211_send_probereq function, broadcast Probe Request frame.
(5) start timer, it is scan_next that overtime function is set.Before overtime during this period of time in, wait for that other nodes beam back the probing response frame coming, then by this nodes records in scanning result.After time-out time, return to the 2nd step.
PROC(Process is passed through in this order) file system offers the application program in wireless stations as interface by result of detection.
In order to strengthen wireless exploration signal energy, accurately locate the position of AP, in embodiments of the present invention, wireless network card is under the driving of WLAN Device Driver, its omnidirectional antenna carrying can be take fixed angle and to a direction, is rotated as unit, for example, can be rotated with 30 degree angles, miter angle or 60Du Jiaowei unit, after rotating to an angle at every turn, wireless network card can pause and continue rotation after a period of time, for example, the 1ms that can pause, 2ms etc.Direction of rotation can be clockwise, can be also counterclockwise, with this, comes the position of 360 degree scannings all WAP (wireless access point) around.And wireless network card is after rotating with fixed angle at every turn, the sector region direction forming to this fixed angle sends probe request, to strengthen the probe request signal energy of this direction, thereby tests more accurately the power of the probe response signal in each region.
S102, receive the probing response frame that all WAP (wireless access point) send to described wireless network card;
Wireless network card sends after probe request, can receive the probe response signal of all directions feedback.Just the intensity of the probe response signal of different directions feedback is different, and transmission quality is different.The signal that the direction of WAP (wireless access point) position is returned is the strongest, and transmission quality is best, from this position more away from signal more weak, transmission quality is poorer.Can take each access point as unit, receive probe response signal, by the intensity of signal, quality and the information recordings such as position of point that send signal are in scanning result, also can take region as unit, receive probe response signal, and all scan-datas that obtain from this region are encapsulated in a packet.
For the position of positioned radio access point accurately, wireless stations can be divided into several subregions by this scanning area in advance by usining the region of wireless network card within the scope of 360 degree of the center of circle as scanning area, take these subregions to receive probing response frame as unit.Scanning area can be divided into 4,6 or 12 etc.
Certainly, in order to make to transmit and response signal concentration of energy, the region of emission detection request signal can match with the region that receives probe response signal, therefore, it is unit that the division of scanning area can be take the anglec of rotation unit of wireless network card, for example, if the antenna Yi30Du Wei unit of wireless network card is rotated, scanning area can be divided into 12; If the antenna Yi45Du Wei unit of wireless network card is rotated, scanning area can be divided into 8.
S103, according to the signal strength signal intensity of described probing response frame and transmission quality, determine the position at described WAP (wireless access point) place;
When detect cycle finishes, wireless stations obtains wireless aps response signal intensity level according to the probe response report receiving.In this scan report, recorded all Basic Service Set BSS(Basic Service Set that find in detection process) and relevant parameter, as MAC(Media Access Control) address, BSSID, BSS type, RSSI(Received Signal Strength Indicator) and mode of operation etc., wireless stations is according to surveying report, the address of select-out signal intensity maximum, is located as the position at AP place.
If take region carries out the reception of probe response packets as unit, according to the packet that comprises these all scan-datas in region obtaining from this region, determine the position of WAP (wireless access point).Find signal strength signal intensity the strongest, top-quality probe response packets, determines the subregion that this respond packet is corresponding, this subregion is defined as to the region at WAP (wireless access point) place.
S104, to described locality, send data, to carry out data communication with described WAP (wireless access point).
Determined behind AP position, if wireless stations does not also connect with this AP, wireless stations can send the request connecting to this AP, if AP agrees to the connection request of wireless stations, to wireless stations, send associated response, wireless stations just can obtain the complete access right of this AP place BSS.Just can carry out data communication with this AP.
Take in the locate mode that region is unit, if determined the region at AP place, wireless stations will be called WLAN Device Driver, the antenna of wireless network card is adjusted into the direction towards this subregion, then directionally to this subregion, send data, with the AP in this region row data communication of going forward side by side that connects.Can strengthen the energy of wireless transmission signal like this, also can not disturb other Wireless Telecom Equipment simultaneously.
The embodiment of the present invention, by signal strength signal intensity and the transmission quality of probing response frame, is determined the position of AP, because wireless network card can send detectable signal to a direction, therefore, has strengthened the quality of detectable signal, has improved speed and the accuracy of location; Behind definite AP position, equally only to a direction or position, send communication data, avoided the signal between a plurality of wireless transmission devices to disturb, improved wireless transmission rate.
Embodiment bis-
Referring to Fig. 2, the present invention also provides the data transmission device of the intelligent television wireless stations corresponding with the method for embodiment mono-, it is characterized in that, described wireless stations comprises a wireless network card, it is characterized in that, described device comprises with lower unit:
Transmitting element 201, for described wireless network card towards periphery all available channels send wireless exploration claim frames so that the position of scanning WAP (wireless access point);
Receiving element 202, the probing response frame sending to described wireless network card for receiving described WAP (wireless access point);
Position determination unit 203, for determining the position at described WAP (wireless access point) place according to the signal strength signal intensity of described probing response frame and transmission quality;
Communication unit 204, for sending data to described locality, to carry out data communication with described WAP (wireless access point).
The transmitting device of the embodiment of the present invention, locates AP position by directive sending detection data, and finds after AP, directive sending communication data carries out transfer of data, than 360 degree broadcast wireless signals, can reduce radio transmitted power, save the energy, reduced energy consumption; Meanwhile, directed data send also avoided and other wireless signals between disturb, improved transmission rate.
For aforesaid each embodiment of the method, for simple description, therefore it is all expressed as to a series of combination of actions, but those skilled in the art should know, the present invention is not subject to the restriction of described sequence of movement, because according to the present invention, some step can adopt other along go or carry out simultaneously; Secondly, those skilled in the art also should know, said method embodiment all belongs to preferred embodiment, and related action and module might not be that the present invention is necessary.
For the aforesaid embodiment that respectively installs, for simple description, therefore it is all expressed as to a series of unit combination, but those skilled in the art should know, the present invention is not subject to the restriction of described unit combination, because according to the present invention, some unit can adopt other unit to carry out; Secondly, those skilled in the art also should know, said apparatus embodiment all belongs to preferred embodiment, and related unit might not be that the present invention is necessary.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and each embodiment stresses is the difference with other embodiment, between each embodiment identical similar part mutually referring to.For system embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
Above to the data transmission method of a kind of intelligent television wireless stations provided by the present invention and device, be described in detail, applied specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.

Claims (10)

1. a data transmission method for intelligent television wireless stations, is characterized in that, described wireless stations comprises a wireless network card, it is characterized in that, said method comprising the steps of:
Described wireless network card towards periphery all available channels sends wireless exploration claim frame, so that the position of scanning WAP (wireless access point);
Receive the probing response frame that described WAP (wireless access point) sends to described wireless network card;
According to the signal strength signal intensity of described probing response frame and transmission quality, determine the position at described WAP (wireless access point) place;
To described locality, send data, to carry out data communication with described WAP (wireless access point).
2. the data transmission method of intelligent television wireless stations according to claim 1, is characterized in that, described wireless network card towards periphery all available channels sends wireless exploration claim frame, to scan the step of the position of WAP (wireless access point), comprise,
The antenna of described wireless network card be take fixed angle as unit is to a direction rotation, the position of 360 degree scanning WAP (wireless access point).
3. the data transmission method of intelligent television wireless stations according to claim 2, it is characterized in that, the antenna of described wireless network card is at every turn with after fixed angle rotation, and the sector region direction forming to this fixed angle sends probe request, so that the position of scanning WAP (wireless access point).
4. according to the data transmission method of the intelligent television wireless stations described in claim 2 or 3, it is characterized in that, described fixed angle is 30 degree.
5. according to the data transmission method of the intelligent television wireless stations described in claim 2 or 3, it is characterized in that, after the described fixed angle of the each rotation of antenna of described wireless network card, after the scheduled time of pausing, continue rotation.
6. according to the data transmission method of the intelligent television wireless stations described in claim 2 or 3, it is characterized in that,
Described wireless network card towards periphery all available channels send wireless exploration claim frames, to before the step of the position of scanning WAP (wireless access point), also comprise,
Described wireless stations is the scanning area of take within the scope of 360 degree that described wireless network card is the center of circle, and take the anglec of rotation unit of described wlan card antenna is unit, is divided in advance a plurality of subregions;
The step of the probing response frame that the described WAP (wireless access point) of described reception sends to described wireless network card comprises,
Take described subregion as unit reception probing response frame.
7. the data transmission method of intelligent television wireless stations according to claim 6, it is characterized in that, describedly according to the signal strength signal intensity of described probing response frame and transmission quality, determine that the step of the position of described WAP (wireless access point) comprises, the all probing response frames that receive from described subregion are packaged into a probe response packets, according to the signal strength signal intensity of each probe response packets, determine the position of described WAP (wireless access point).
8. the data transmission method of intelligent television wireless stations according to claim 7, is characterized in that,
Describedly according to the signal strength signal intensity of described probing response frame and transmission quality, determine that the step of the position at described WAP (wireless access point) place comprises:
The subregion corresponding to probe response packets of returned signal strength signal intensity maximum is defined as to the position at WAP (wireless access point) place;
Describedly to described locality, send data, so that the step of carrying out data communication with described WAP (wireless access point) comprises:
To this subregion, send data, to carry out data communication with described WAP (wireless access point).
9. according to the data transmission method of the intelligent television wireless stations described in claim 2 or 3, it is characterized in that, the direction of rotation of described wireless network card is clockwise direction or counter clockwise direction.
10. a data transmission device for intelligent television wireless stations, is characterized in that, described wireless stations comprises a wireless network card, it is characterized in that, described device comprises with lower unit:
Transmitting element, for described wireless network card towards periphery all available channels send wireless exploration claim frames so that the position of scanning WAP (wireless access point);
Receiving element, the probing response frame sending to described wireless network card for receiving described WAP (wireless access point);
Position determination unit, for determining the position at described WAP (wireless access point) place according to the signal strength signal intensity of described probing response frame and transmission quality;
Communication unit, for sending data to described locality, to carry out data communication with described WAP (wireless access point).
CN201310749378.7A 2013-12-31 2013-12-31 Data transmission method of wireless workstation of intelligent television Pending CN103716855A (en)

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JP2016220013A (en) * 2015-05-20 2016-12-22 日本電気通信システム株式会社 Communication device and connection method therefor
WO2018033162A1 (en) * 2016-08-19 2018-02-22 中兴通讯股份有限公司 Beam guidance method, and inter-beam coordinated transmission method and apparatus
CN107889138A (en) * 2016-09-30 2018-04-06 法乐第(北京)网络科技有限公司 Communication link quality determines method, communication link system of selection and its device
CN108008706A (en) * 2017-11-27 2018-05-08 北京小米移动软件有限公司 The control method and device of household electrical appliances
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CN113038464A (en) * 2017-02-22 2021-06-25 荣耀终端有限公司 Information transmission method and equipment

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Application publication date: 20140409