CN101180836A - Wireless local area network scan based on location - Google Patents
Wireless local area network scan based on location Download PDFInfo
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- CN101180836A CN101180836A CNA2006800176341A CN200680017634A CN101180836A CN 101180836 A CN101180836 A CN 101180836A CN A2006800176341 A CNA2006800176341 A CN A2006800176341A CN 200680017634 A CN200680017634 A CN 200680017634A CN 101180836 A CN101180836 A CN 101180836A
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- geographical position
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
A system, apparatus and methods are described that define the frequency in which a scan for a wireless local area network access point (140) is performed. In one embodiment, a scan is performed when a change in the geographic location of a mobile wireless device (115) is identified.
Description
The application number that the application requires on March 23rd, 2005 to submit is 60/664,921 U.S. Provisional Application No..
Technical field
Present invention relates in general to wireless communication technology, particularly based on the scanning at WLAN (wireless local area network) (" WLAN ") access point in the geographical position of wireless device.
Background technology
The importance of radio communication and the application in numerous different electric equipments thereof are well-known.Updating wireless device makes the user can more effectively carry out the new characteristic and the function of voice communications versus data communications to comprise.With this specific character is that WLAN communication is integrated in a large amount of different wireless device that comprises cell phone, smart phone and personal digital assistant (" PDA ").
Typically, wireless device is communicated by letter with WLAN via the access point on the network.The WLAN access point is as the gateway work on the network, and the permission wireless device is communicated by letter with the miscellaneous equipment on the network.This communication usually needs characteristic safe in utilization and help to set up the certificate of the channel that wireless device and access point communicate by letter thereon.But in order to set up communication channel, wireless device must at first be discerned the existence of active wlan network.In the trial of the availability of keeping the WLAN access point, some mobile wireless device has the automatic detection characteristic that continues the available WLAN access point that this equipment of scanning can communicate with.Therefore, if wireless device moves to outside the scope of WLAN access point, this equipment can be discerned new WLAN access point or can constantly scan available WLAN access point.
In scanning process, wireless device search is from the signal of WLAN access point.This signal can be WLAN access point beacon or other communication to the identity of wireless device wlan network.Depend on position, WLAN communication protocol or other this factor of access point, these WLAN access point signals can occur on many different channels or frequency.Therefore, scanning process needs a plurality of channels that WLAN communication can take place of wireless device search thereon.
The lasting scanning process of this a plurality of communication channels to the WLAN access point can be to the processing resource build-up of pressure of wireless device, and has increased the power consumption of wireless device.This restriction to resource and power can reduce the life-span of wireless device power supply and the overall performance of this equipment.
Summary of the invention
The present invention has reduced the demand of mobile wireless device to resource and power consumption by the scanning of control mobile wireless device to the WLAN access point.The change in the geographical position by using wireless device has reduced the frequency of WLAN access point scanning with driver sweep.In one embodiment of the invention, the variation in the geographical position of identification mobile wireless device, and, carry out scanning to the WLAN access point in response to this variation.Mobile wireless device can be carried out active scan or drive sweep.
In another embodiment of the present invention, the variation in the geographical position of identification mobile wireless device.Mobile wireless device has the tabulation of the WLAN access point related with a plurality of geographical position.In response to change in location, mobile wireless device attempts discerning the potential WLAN access point corresponding to the reposition of mobile wireless device from the tabulation of WLAN access point.If discerned potential WLAN access point, initialization is to the scanning of WLAN access point.This scanning can be active or passive.
With reference to embodiments of the invention, can be described in the drawings its example.These features are used for describing and non-limiting.Although in the context of these examples, described the present invention generally, should be appreciated that this is not to be used to limit the scope of the invention to these certain embodiments.
Description of drawings
Fig. 1 is the illustration that comprises the WLAN of the access point that wireless device can communicate with according to an embodiment of the invention;
Fig. 2 is the block diagram of wireless device according to an embodiment of the invention;
Fig. 3 has described the position of wireless device of depending on according to an embodiment of the invention to scan the flow chart of the method for WLAN access point;
Fig. 4 is the diagram of wireless device drive sweep according to an embodiment of the invention;
Fig. 5 is the block diagram of wireless device active scan according to an embodiment of the invention.
Embodiment
System, apparatus and method have been described, so that the scanning to the WLAN access point to be provided, in response to the change in the geographical position of mobile wireless device and initiate described scanning.In one embodiment of the invention, wireless device is discerned its relevant position and is determined whether it has changed the geographical position.If this position change takes place, then initiate WLAN scanning.In another embodiment, wireless device is safeguarded the WLAN access point and at the tabulation in the geographical position of the association of each WLAN access point.In response to the mobile wireless device that just changes the geographical position, the tabulation of new position and WLAN access point is compared.If this comparison shows that the WLAN access point should can be used for new position, mobile wireless device can scan the WLAN access point.These described embodiment are exemplary, person of skill in the art will appreciate that the variation and the modification that comprise in the present invention these embodiment.
In the following description, in order to illustrate, illustrated specific details so that the understanding of the present invention to be provided.But, it is evident that to those skilled in the art and can under the situation of not using these details, implement the present invention.And person of skill in the art will appreciate that can be in conjunction with following described embodiments of the invention in comprising the many different wireless device of cell phone, smart phone and PDA.The present invention can be integrated in these wireless devices as hardware, software or firmware.Therefore, be the demonstration of specific embodiment of the present invention in structure shown in the block diagram and equipment below, be used to avoid fuzzy the present invention.
In this specification " embodiment ", " another embodiment " or the reference of " embodiment " are meaned, comprise described specific feature, structure, characteristic or the function related at least one embodiment of the present invention with this embodiment.Term " in one embodiment " that occurs in a plurality of places in this manual and the same embodiment of nonessential whole references.
[system survey]
Fig. 1 shows WLAN, and it has the access point that wireless device can communicate with.WLAN comprises WAP (wireless access point) 140, the network switch or router one 50, first network station (network station), 125 and second network station 135.WLAN can communicate by letter with some network station in wired or wireless connection.In addition, the WAP (wireless access point) 140 and the network switch or router one 50 can be integrated in the same shell.
Mobile wireless device 115 can be communicated by letter with WLAN access point 140 and operation in WLAN itself.This communication needs initial handshake procedure, and WAP (wireless access point) 140 provides some to describe the parameter of its communication protocol to mobile wireless device 115 in handshake procedure.Then, produce the communication channel that permission transmits and receive data between access point 140 and mobile wireless device 115.
According to one embodiment of present invention, mobile wireless device 115 does not continue scanning WLAN access point.But mobile wireless device 115 has been discerned its geographical position change back scanning.Variation in this geographical position means that mobile wireless device has moved enough distances, makes current unavailable with communicating by letter of current WLAN access point.
Mobile wireless device 115 can use many diverse ways to discern its position, and described method comprises the global positioning system feature, from the positional information of cellular tower/base station or use the triangulation technique of a plurality of cellular tower/base station.After detecting change in location, mobile wireless device 115 can be initiated the scanning to the WLAN access point.This trigger event is that the position variation allows mobile wireless device 115 to avoid constantly scanning access point.
In another embodiment, mobile wireless device 115 can compare its reposition and known WLAN access point and the tabulation of corresponding geographical position, to determine whether permitted scanning.If discerned the corresponding WLAN access point in one or more and new geographical position, initiated scanning.This embodiment has also reduced the quantity of the performed scanning of mobile wireless device 115, and has therefore reduced the demand of it being handled resource and power consumption.
[wireless mobile apparatus]
The Fig. 2 that comprises functional block shows mobile wireless device according to an embodiment of the invention.Mobile wireless device 200 comprises antennal interface 225, geographic position locator 230, WLAN scan module 240 and can comprise the memory 250 of WLAN access point catalogue 235.These assemblies and module can be integrated in the single component or a plurality of assembly in the equipment 200, and can hardware, software or firmware mode realize.
In mobile wireless device 200, antennal interface 225 provides a plurality of assemblies and the received information of module accesses device antenna, and allows to send data on the communication channel from these assemblies and module.When in mobile wireless device 200, when between antennal interface 225 and a plurality of assembly and module, transmitting this information, can make amendment, reformatting or other processing to this information.
Geographic position locator 230 identification mobile wireless devices 200 accurately or geographical position roughly.In one embodiment, can discern this geographical position by using the GPS characteristic that can be integrated in the equipment 200.Equipment 200 uses the triangulation method of a plurality of gps satellites of the precise information that has adopted the position that equipment 200 is provided.In another embodiment, equipment 200 can use the information of the position of the wireless area of working therein about equipment 200.Can obtain this cell information from cellular tower/base station, and can use this cell information to be similar to position to equipment 200.It will be understood by those of skill in the art that other method (comprising the triangulation to cell tower) that can use the identification equipment position is similar to the position to equipment 200.
After the geographical position of geographic position locator 230 identification mobile wireless devices 200 has changed, the scanning that WLAN scan module 240 is initiated the WLAN access point.This scanning can be drive sweep or active scan, equipment 200 scanning WLAN access point beacons in drive sweep, equipment active searching and request WLAN access point beacon in active scan.
According to another embodiment, WLAN scan module 240 compares the tabulation in new device location and WLAN access point and corresponding geographical position.Can safeguard this tabulation in memory 250, wherein WLAN access point catalogue 235 comprises a plurality of geographical position and related WLAN access point.Can construct this catalogue 235 in many different modes, wherein the geographical position is related with the WLAN access point.Carry out this relatively after, only under this comparison shows that the situation that the WLAN access point occurs, WLAN scan module 240 just initiated to scan.This scanning can be initiatively or passive scanning.
Fig. 3 shows the method that is independent of the scanning WLAN access point of structure according to an embodiment of the invention.Mobile wireless device identification 305 its geographical position.Can use and comprise and use GPS function, combining wireless sub-district or cell tower, the triangulation of a plurality of cell towers of use or the several different methods of other method as known in the art to finish this identification.
Mobile wireless device determine 310 its whether changed the geographical position.Can use and comprise that the previous geographical position of the geographical position that will be discerned and this equipment compares or determine that extraneous several different methods that when this equipment has moved to the WLAN access point carries out this and determine.
Whether mobile wireless device is discerned 315 WLAN access points and should be occurred in the geographical position of being discerned.Under the situation that does not scan access device, carry out this identification, and can carry out this identification in inside or obtain the WLAN access-in point information from external source.For example, the geographical position of being discerned can be compared with the WLAN access point of inside and the tabulation of relevant position, whether should can use in the currently identified geographical position of equipment to determine access point.
In one embodiment of the invention, if before any scanning the unidentified WLAN access point of equipment, wireless device do not carry out 330 scanning.
But,, carry out scanning 320 to one or more WLAN access points of discerning if discerned the WLAN access point.This scanning can comprise a plurality of communication channels that can provide or obtain corresponding WLAN information thereon of scanning.In addition, this scanning can be active scan or drive sweep.
A) drive sweep
Fig. 4 shows the exemplary drive sweep that can carry out according to one embodiment of present invention.Can after the change in the geographical position of having discerned mobile wireless device 415, initiate this drive sweep.And, in another embodiment, can be only after the potential WLAN access point of having discerned corresponding to the new geographical position of equipment 415, initiate this scanning.
In one embodiment of the invention, mobile wireless device 415 monitors that a plurality of communication channels are with the beacon of identification from WLAN access point 440.Depend on the geographical position, the quantity of these channels and characteristic frequency can change.For example, in the U.S., the ISM wave band comprises seven channels that WLAN communication can take place thereon.Comparatively speaking, channel quantity in other country and frequency thereof typically are different from channel quantity and the frequency thereof in the U.S..Therefore, drive sweep needs mobile wireless device 415 to be in the receiving mode at each channel.Can make accurate step in the drive sweep be adapted to the position of mobile wireless device 415.
In case mobile wireless device 415 has received and handled beacon frame 430, it can be communicated by letter with WLAN access point 440 and add this wlan network itself.
B) active scan
Fig. 5 shows the exemplary active scan that can carry out according to one embodiment of present invention.Can after the change in the geographical position of having discerned mobile wireless device 515, initiate this scanning.And, in another embodiment, can be only after the potential WLAN access point of having discerned corresponding to the new geographical position of equipment 515, initiate this scanning.
In one embodiment of the invention, mobile wireless device 515 upgrades its NAV so that it can be communicated by letter with WLAN access point 540.Can 570 finish this renewal process by intercepting and capturing communicating by letter between another wireless device 525 and the WLAN access point 540 on the channel 565.The NAV information 575 permission mobile wireless devices of being intercepted and captured 515 upgrade the NAV of himself, so that they can be to WLAN access point 540 emission detection requests 550 frames.
After emission detection, mobile wireless device 515 is waited for 540 these detections of response of WLAN access point.This response generally should take place in two beacon frame interval.Mobile wireless device 515 must remain on receiving mode during this wait, to guarantee to detect and receive this response.If do not receive response, then mobile wireless device 515 scans next channel in a similar fashion.
In response to probe request, WLAN access point 540 is to mobile wireless device 515 emission detection response 585.As indicated above, this probe response 585 comprises the information such as the SSID information relevant with this network with other.Handle these probe responses by mobile wireless device 515 so that equipment 515 can with WLAN access point 540 and corresponding network service.
The process of the scanning wlan network of use active or drive sweep has very big demand to the resource of mobile wireless device.Especially, this scanning process needs the power of larger amt also may shorten the useful life of device power supply (DPS).Therefore, the ability of the performed scanning amount of minimizing equipment can strengthen its overall performance and prolong its power source life.In WLAN scanning, use identification that the geographical position to equipment changes as catalyst.And, in one embodiment, if only driver sweep under having discerned corresponding to the situation of the WLAN access point in the new geographical position of wireless device.
Though described the present invention with reference to some embodiment, person of skill in the art will appreciate that to provide multiple modification.The invention provides the multiple modification to embodiment, it only limits to appended claim.
Claims (20)
1. a scanning means is positioned on the wireless device 515, is used to discern wireless local network connecting point 140, and described device comprises: antennal interface 225, be coupled to antenna to receive and emission information; Geo-location device 115 is coupled to antennal interface, its geographical position that has been used to discern the wireless device timing changing; And wireless local area network scan module 240, be coupled to geo-location device 230, make described wireless device initiate scanning in response to the variation in the geographical position of this wireless device to wireless local network connecting point.
2. scanning means as claimed in claim 1, wherein the wireless local area network scan module is initiated the drive sweep to wireless local network connecting point.
3. scanning means as claimed in claim 1, wherein, the wireless local area network scan module is initiated the active scan to wireless local network connecting point.
4. scanning means as claimed in claim 1 also comprises: the wireless local network connecting point catalogue, be coupled to the wireless local area network scan module, and comprise a plurality of wireless local network connecting points stored related with a plurality of geographical position of storing; Wherein, if in described a plurality of wireless local network connecting points of storing, determined the wireless local network connecting point of being stored corresponding to the geographical position that has changed of described wireless device, then the wireless local area network scan module is initiated the scanning to wireless local network connecting point.
5. scanning means as claimed in claim 4, wherein the wireless local area network scan module is carried out drive sweep.
6. scanning means as claimed in claim 4, wherein the wireless local area network scan module is only initiated scanning in response to the change in the geographical position of described wireless device.
7. scanning means as claimed in claim 1, wherein the geo-location device uses GPS-capable with its geographical position of having discerned described wireless device timing changing.
8. scanning means as claimed in claim 1, wherein the geo-location device uses the information that obtains from cell tower with its geographical position of having discerned described wireless device timing changing.
9. scanning means as claimed in claim 1, wherein, the geographical position that can be used for of being found set up the access point of network is stored in the memory in the wireless device, and is used for follow-up use at wireless device and triggers scanning to the access point of being found.
10. the method for a Wlan scanning access point, this method comprises: the geographical position of identification mobile wireless device; Determine whether described mobile wireless device has changed its position for previous geographical position; And in response to the change in the geographical position of described mobile wireless device and initiate scanning to wireless local network connecting point.
11. method as claimed in claim 10 is wherein carried out scanning to wireless local network connecting point passively by described mobile wireless device.
12. method as claimed in claim 10 is wherein carried out scanning to wireless local network connecting point on one's own initiative by described mobile wireless device.
13. method as claimed in claim 10 wherein uses global positioning system to discern first geographical position of described mobile wireless device.
14. method as claimed in claim 10 is wherein only in response to the change in the geographical position of described mobile wireless device and initiate scanning to wireless local network connecting point.
15. a computer-readable medium has and is used for the instruction that enforcement of rights requires 10 described methods.
16. method as claimed in claim 10 is further comprising the steps of: storage institute finds to be used to set up the geographical position of the access point of network, with the scanning of triggering between the follow-up operating period of described mobile device to the access point found.
17. the method for a Wlan scanning access point, this method comprises: first geographical position of identification mobile wireless device; Determine whether described mobile wireless device has changed its position for previous geographical position; Identification is corresponding to the potential wireless local network connecting point in described first geographical position; And initiate scanning in response to the potential wireless local network connecting point of being discerned to wireless local network connecting point.
18. method as claimed in claim 17, wherein only in response to the identification of the corresponding potential wireless local network connecting point in described first geographical position, and initiate scanning to wireless local network connecting point.
19. method as claimed in claim 17 is wherein carried out the scanning to wireless local network connecting point passively.
20. a computer-readable medium has and is used for the instruction that enforcement of rights requires 14 described methods.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66492105P | 2005-03-23 | 2005-03-23 | |
| US60/664,921 | 2005-03-23 | ||
| US60/703,795 | 2005-06-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101180836A true CN101180836A (en) | 2008-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2006800176341A Pending CN101180836A (en) | 2005-03-23 | 2006-03-23 | Wireless local area network scan based on location |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238693A (en) * | 2010-04-20 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | System and method for automatically searching WiFi (wireless fidelity) hotspots |
| CN105025558A (en) * | 2014-04-30 | 2015-11-04 | 三星电机株式会社 | Wireless communications apparatus and wireless communications method using the same |
| CN105898705A (en) * | 2016-06-24 | 2016-08-24 | 维沃移动通信有限公司 | Method for controlling scanning frequency of wireless local area network and mobile terminal |
| CN107071806A (en) * | 2017-06-16 | 2017-08-18 | 厦门美图移动科技有限公司 | The method and mobile terminal of a kind of optimizing network speed |
| CN107113572A (en) * | 2015-01-06 | 2017-08-29 | 微软技术许可有限责任公司 | For the geography information of wireless network |
| WO2018232606A1 (en) * | 2017-06-20 | 2018-12-27 | Beijing Didi Infinity Technology And Development Co., Ltd. | Methods and apparatuses for detecting position change of access point |
| CN110418292A (en) * | 2019-07-31 | 2019-11-05 | 青岛海信移动通信技术股份有限公司 | A kind of method and apparatus adjusting WLAN sweep spacing |
-
2006
- 2006-03-23 CN CNA2006800176341A patent/CN101180836A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102238693A (en) * | 2010-04-20 | 2011-11-09 | 深圳富泰宏精密工业有限公司 | System and method for automatically searching WiFi (wireless fidelity) hotspots |
| CN102238693B (en) * | 2010-04-20 | 2015-03-11 | 深圳富泰宏精密工业有限公司 | System and method for automatically searching WiFi (wireless fidelity) hotspots |
| CN105025558A (en) * | 2014-04-30 | 2015-11-04 | 三星电机株式会社 | Wireless communications apparatus and wireless communications method using the same |
| CN107113572A (en) * | 2015-01-06 | 2017-08-29 | 微软技术许可有限责任公司 | For the geography information of wireless network |
| US10848902B2 (en) | 2015-01-06 | 2020-11-24 | Microsoft Technology Licensing, Llc | Geographic information for wireless networks |
| CN105898705A (en) * | 2016-06-24 | 2016-08-24 | 维沃移动通信有限公司 | Method for controlling scanning frequency of wireless local area network and mobile terminal |
| CN105898705B (en) * | 2016-06-24 | 2019-06-07 | 维沃移动通信有限公司 | A kind of method and mobile terminal of the scan frequency controlling WLAN |
| CN107071806A (en) * | 2017-06-16 | 2017-08-18 | 厦门美图移动科技有限公司 | The method and mobile terminal of a kind of optimizing network speed |
| WO2018232606A1 (en) * | 2017-06-20 | 2018-12-27 | Beijing Didi Infinity Technology And Development Co., Ltd. | Methods and apparatuses for detecting position change of access point |
| US10893500B2 (en) | 2017-06-20 | 2021-01-12 | Beijing Didi Infinity Technology And Development Co., Ltd. | Methods and apparatuses for detecting position change of an access point |
| CN110418292A (en) * | 2019-07-31 | 2019-11-05 | 青岛海信移动通信技术股份有限公司 | A kind of method and apparatus adjusting WLAN sweep spacing |
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Open date: 20080514 |