CN101784109B - Device and method for connecting wireless network - Google Patents
Device and method for connecting wireless network Download PDFInfo
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- CN101784109B CN101784109B CN 200910003579 CN200910003579A CN101784109B CN 101784109 B CN101784109 B CN 101784109B CN 200910003579 CN200910003579 CN 200910003579 CN 200910003579 A CN200910003579 A CN 200910003579A CN 101784109 B CN101784109 B CN 101784109B
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Abstract
The invention provides a device and a method for connecting a wireless network to achieve wireless connection of an access point. The device comprises a radio frequency module, a fundamental frequency module and a control module, wherein the radio frequency module receives a packet transmitted by the access point; the fundamental frequency module processes the packet to generate signal intensity corresponding to the access point; and the control module generates a conditioning signal according to the signal intensity and adjusts a gain value of the radio frequency module according to the conditioning signal.
Description
Technical field
The present invention is relevant a kind of network connectivity apparatus and method, particularly a kind of connecting wireless network apparatus and method.
Background technology
Science and technology is showing improvement or progress day by day, network has become one of essential instrument of modern, wherein the connection mode of wireless network along with the increase of wireless network frequency range, the lifting of wireless transmission rate and the expansion of wireless network reception scope, makes wireless network become main flow gradually.
For WLAN (wireless local area network; WLAN) in the application; in a certain particular range, there is many access points (access point through regular meeting; AP); and for the user; only a wherein specific access point (AP) need be connected, the wireless transmission of data can be carried out by wireless network.
The user couples by platform (STA) and access point, to finish the line of wireless network.After platform S1 couples with a certain access point A1, this moment other access point A2 and the wireless transmission between other platform S2, namely be to disturb for platform S1, if there is not suitable treatment mechanism, this interference can have a strong impact on efficiency of transmission and the quality of platform S1.Moreover, sometimes along with the movement (because of the movement along with the user) of platform, make platform away from the access point that has originally coupled, so will cause transfer of data to be difficult for or cause broken string, and the phenomenon of line produces again.General known technology can adopt erroneous judgement, and (False Alarm, number of times FA) is as the foundation of adjusting initial gain (Initial Gain).
Yet known technology still has its shortcoming.For example: as under very clean environment, as do not have other access point, but a certain interference source is arranged and when allowing platform that erroneous judgement takes place, because erroneous judgement always, known technology can be turned down initial gain to avoid erroneous judgement, but when platform and access point when doing transfer of data because be full of package in the air, the erroneous judgement chance reduces, also because so initial gain being heightened, but because the certain interference source still exists, thus can influence whole transmission throughput (throughput, TP).Again for example: having under the environment of many access points, known technology can exist because of erroneous judgement always, and initial gain is turned down to suppress erroneous judgement, also because the turning down of initial gain, make platform when doing acquisition point position laying (s ite-survey), the access point number change that can see can reduce many.
As shown in the above, how in WLAN system, to reach obdurability line (Robus tConnection) and still remain effort.
Summary of the invention
In view of this, the present invention proposes a kind of connecting wireless network apparatus and method to overcome above-mentioned problem.
The present invention proposes a kind of connecting wireless network apparatus and method, adopt signal strength signal intensity suitably to adjust the yield value of connecting wireless network device, make the connecting wireless network device can in Radio Network System, reach obdurability line (robust connection), and then promote wireless transmission efficient and quality.
The present invention proposes a kind of connecting wireless network device, and in order to the wireless connections access point, this device comprises: the receiving unit in the radio-frequency module receives the package that this access point transmits; Fundamental module is handled this package and is produced reception signal strength signal intensity corresponding to this access point; And control module, produce reception according to this reception signal strength signal intensity and adjust signal, and adjust the receiving gain value that signal is adjusted the receiving unit in this radio-frequency module according to this reception, wherein adjust this receptions adjustment signal so that there are particular kind of relationship in fact in this receiving gain value and this reception signal strength signal intensity.
The present invention also proposes a kind of connecting wireless network method, in order to the wireless connections access point, comprises the following step: receive the package that this access point transmits; Handle this package and produce reception signal strength signal intensity corresponding to this access point; Produce reception according to this reception signal strength signal intensity and adjust signal; And according to this receiving gain value that receives the receiving unit in the adjustment signal adjustment radio connecting, wherein adjust this reception and adjust signal so that there are particular kind of relationship in fact in this receiving gain value and this reception signal strength signal intensity.
Relevant preferred embodiment of the present invention and effect thereof, cooperate now graphic explanation as after.
Description of drawings
Fig. 1 is the first embodiment schematic diagram of connecting wireless network device of the present invention.
Fig. 2 is the second embodiment schematic diagram of connecting wireless network device of the present invention.
Fig. 3 A is connecting wireless network view of the present invention ().
Fig. 3 B is connecting wireless network view of the present invention (two).
Fig. 3 C is connecting wireless network view of the present invention (three).
Fig. 4 is the flow chart of connecting wireless network method of the present invention.
[main element label declaration]
1: the connecting wireless network device
10: radio-frequency module
12: low noise amplifier
14: the amplitude gain amplifier
20: fundamental module
22: buffer
30: control module
32: medium access control layer
40,41,42,43,44,45,46: access point
Embodiment
Please refer to " Fig. 1 ", this figure is depicted as the first embodiment schematic diagram of connecting wireless network device of the present invention.Connecting wireless network device 1 proposed by the invention, in order to wireless connections access point 40, this device comprises: radio-frequency module 10, fundamental module 20 and control module 30.
(radio frequency, RF) module 10 receives access point (access point, AP) 40 packages that transmit (packet) to radio frequency.When fundamental frequency (base band, after BB) module 20 is handled packages, can obtain corresponding to access point 40 signal strength signal intensity (signal strength, SS).One embodiment, this package can be beacon (beacon) package, and fundamental module 20 calculates the information that the beacon package transmits, and can learn that radio-frequency module 10 is receiving beacon package that access point 40 transmits instantly, the signal strength signal intensity size of access point 40.
Therefore, as shown in the above description, the size of yield value and the size of signal strength signal intensity are to be inversely proportional to, that is to say that when signal strength signal intensity was big, control module 30 just can be turned down the numerical value of yield value, and when signal strength signal intensity hour, control module 30 just can be heightened the numerical value of yield value.
Please refer to " Fig. 2 " and be the second embodiment schematic diagram of connecting wireless network device of the present invention.In second embodiment, can find that radio-frequency module 10 comprises: low noise amplifier (low noise amplifier, LNA) 12 and/or amplitude gain amplifier (voltage gain amplifier, VGA) 14.Therefore, control module 30 is to adjust the yield value of low noise amplifier 12 and/or amplitude gain amplifier 14 according to adjusting signal.
In addition, fundamental module 20 can comprise buffer 22.Produce when adjusting signal when control module 30 basis signal intensity, can earlier the adjustment signal temporarily be stored among the buffer 22, fundamental module 20 can will be adjusted signal by the control path between radio-frequency module 10 and the fundamental module 20 (RF-BB control path) and be sent to radio-frequency module 10 afterwards.
Moreover control module 30 can comprise medium access control (media access control, MAC) layer 32.The unit that medium access control layer 32 all has for general radio network device, can by medium access address (MAC address) judge this package whether by 40 transmissions of access point (desired AP) of desire line, and whether be the package that will send connecting wireless network device 1 really to.If can produce the adjustment signal according to the signal strength signal intensity of revealing in this package.In addition, control module 30 also can comprise driver end (driver), in order to drive connecting wireless network device 1, can communicate with each other between the electronic installation (as: computer system) that connecting wireless network device 1 and connecting wireless network device 1 are coupled.
Because many factors all can change the signal strength signal intensity between connecting wireless network device 1 and the access point 40 in wireless network environment.Therefore, in order to reach dynamic adjustment yield value, control module 30 can one period scheduled time of every interval namely by fundamental module 20 in the updating value of acquisition signal strength signal intensity, and then adjust signal in order to upgrade, so can dynamically adjust the yield value of radio-frequency module 10.Hence one can see that, according to the signal strength signal intensity between access point 40 and the connecting wireless network device 1, connecting wireless network device 1 can dynamically be adjusted yield value to couple access point 40, so not only can avoid causing because of interference the decay of connection quality, also can avoid broken string between connecting wireless network device 1 and the access point 40.
In addition, because user's shift position is excessive or cause signal strength signal intensity to diminish suddenly because of multi-path (multipath), cause radio-frequency module 10 can't receive package or broken string for fear of connecting wireless network device 1.Therefore, control module 30 can (for example: 10dB), produce the adjustment signal according to deducting the signal strength signal intensity of default value more afterwards deduct signal strength signal intensity default value earlier when receiving signal strength signal intensity.(this default value can be not less than 3dB signal strength signal intensity to be stepped back (back off) default value, for example be 10dB), the yield value that can allow the yield value adjusted adjust than not stepping back this default value is greater, that is to say, can allow big that the yield value of radio-frequency module 10 transfers, in order to guaranteeing can just not cause broken string because of a little influence (as: user's movement or multi-path etc.), and influence connection quality.
Under illustrate the connecting wireless network state that utilizes connecting wireless network device 1 proposed by the invention to produce.Please refer to " Fig. 3 A " and be connecting wireless network view of the present invention ().After 1 activation of connecting wireless network device, can do acquisition point position earlier and lay (site survey), find 6 access points 41～46 this moment as shown in FIG., suppose to select to set up line with access point 41.Therefore, receive the package that access points 41 transmit by the radio-frequency module 10 of connecting wireless network device 1, and be sent to fundamental module 20 decoding packages and produce corresponding to access point 41 signal strength signal intensity this moment.At last, producing the adjustment signal by control module 30 basis signal intensity again, yield value can be adjusted to suitable numerical value according to adjusting signal, is final purpose to connect access point 41 under this state.
Please refer to " Fig. 3 B " and be connecting wireless network view of the present invention (two).Expression connecting wireless network device 1 is gradually away from the access point 41 of original line under this state.At this moment, can in the middle of doing the package of transfer of data with access point 41, learn that this moment, access point 41 corresponding signal strength signal intensities diminished gradually.Therefore, control module 30 can be according to the signal strength signal intensity that diminishes strengthens yield value in good time, to keep the lasting line with access point 41.Shown in " Fig. 3 B ", can find, though the yield value of radio-frequency module 10 heightened to make that the coverage of connecting wireless network device 1 is wider, therefore make that the scope that covers has comprised access point 44 more, therefore may produce more interference or background noise, but in keep under this state and original access point 41 between line be even more important purpose.
Please refer to " Fig. 3 C " and be connecting wireless network view of the present invention (three).Under this state expression when connecting wireless network device 1 gradually near original access point 41, so control module 30 signal strength signal intensity grow that can react because of access point 41, and a little less than the yield value accent with radio-frequency module 10.At this moment, the coverage of connecting wireless network device 1 also can be dwindled thereupon.So, the scope that connecting wireless network device 1 comprises is the remaining access point 41 of desiring line only, that is to say 1 tin of package that obtains original access point 41 of connecting wireless network device, and access point 42 and access point 43 aerial packages in the coverage that originally comprises, can not hear because yield value diminishes, its background noise for connecting wireless network device 1 (background noise) tails off, thereby can reduce the interference of connecting wireless network device 1 in wireless network environment.
Please refer to " Fig. 4 ", this figure is depicted as the flow chart of connecting wireless network method.Connecting wireless network method proposed by the invention in order to the wireless connections access point, comprises the following step.
Step S10: receive the package that access point transmits.Wherein, package can be beacon (beacon) package.
Step S20: handle package and produce signal strength signal intensity corresponding to access point.After producing signal strength signal intensity, signal strength signal intensity can be deducted default value.
Step S30: basis signal intensity and produce the adjustment signal.After producing the adjustment signal, can store and adjust signal in buffer.
Step S40: adjust the yield value of radio connecting according to adjusting signal, wherein yield value and signal strength signal intensity are to have particular kind of relationship.In this, particular kind of relationship can be inverse relation, that is adjusts yield value, and the size of yield value and the size of signal strength signal intensity are inversely proportional to.Wherein, yield value can be the yield value of radio-frequency module.
Except above-mentioned steps, also can comprise the following step: one scheduled time of every interval, the updating value of acquisition signal strength signal intensity; According to updating value, upgrade and adjust signal; Dynamically adjust the yield value of radio connecting.
Though technology contents of the present invention discloses as above with preferred embodiment; so it is not in order to limit the present invention; any those skilled in the art; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in the category of the present invention, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (15)
1. connecting wireless network device, in order to the wireless connections access point, this device comprises:
Receiving unit in the radio-frequency module receives the package that this access point transmits;
Fundamental module is handled this package and is produced reception signal strength signal intensity corresponding to this access point; And
Control module, produce reception according to this reception signal strength signal intensity and adjust signal, and adjust the receiving gain value that signal is adjusted this receiving unit in this radio-frequency module according to this reception, wherein adjust this receptions adjustment signal so that there are particular kind of relationship in fact in this receiving gain value and this reception signal strength signal intensity.
2. connecting wireless network device according to claim 1, wherein this particular kind of relationship is inverse relation.
3. connecting wireless network device according to claim 1, wherein this package is the beacon package.
4. connecting wireless network device according to claim 1, wherein this control module every interval scheduled time captures the updating value of this reception signal strength signal intensity by this fundamental module, dynamically adjusts this yield value of this receiving unit in this radio-frequency module in order to upgrade this reception to adjust signal.
5. connecting wireless network device according to claim 1, wherein this receiving unit in this radio-frequency module comprises: low noise amplifier and amplitude gain amplifier, wherein this control module is adjusted yield value or this amplitude gain Amplifier Gain value that signal is adjusted this low noise amplifier according to this reception.
6. connecting wireless network device according to claim 1, wherein this control module comprises medium access control layer.
7. connecting wireless network device according to claim 1, wherein this control module receives this reception signal strength signal intensity, and should receive signal strength signal intensity and deduct default value.
8. connecting wireless network device according to claim 7, wherein this default value is not less than 3dB in fact.
9. connecting wireless network device according to claim 8, wherein this default value is essentially 10dB.
10. connecting wireless network method in order to the wireless connections access point, comprises the following step:
Receive the package that this access point transmits;
Handle this package and produce reception signal strength signal intensity corresponding to this access point;
Produce reception according to this reception signal strength signal intensity and adjust signal; And
Receive the receiving gain value of adjusting the receiving unit in the signal adjustment radio connecting according to this, wherein adjust this reception and adjust signal so that there are particular kind of relationship in fact in this receiving gain value and this reception signal strength signal intensity.
11. connecting wireless network method according to claim 10, wherein this particular kind of relationship is inverse relation.
12. connecting wireless network method according to claim 10, wherein this package is the beacon package.
13. connecting wireless network method according to claim 10 also comprises the following step:
Every interval scheduled time, capture the updating value of this reception signal strength signal intensity;
According to this updating value, upgrade this reception and adjust signal; And
Dynamically adjust this yield value of this receiving unit in the radio connecting.
14. connecting wireless network method according to claim 10, wherein produce this reception signal strength signal intensity after, comprise the following step:
Should receive signal strength signal intensity and deduct default value, wherein this default value is not less than 3dB in fact.
15. connecting wireless network method according to claim 14, wherein this default value is essentially 10dB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910003579 CN101784109B (en) | 2009-01-20 | 2009-01-20 | Device and method for connecting wireless network |
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| CN 200910003579 CN101784109B (en) | 2009-01-20 | 2009-01-20 | Device and method for connecting wireless network |
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| CN101784109A CN101784109A (en) | 2010-07-21 |
| CN101784109B true CN101784109B (en) | 2013-08-21 |
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| CN108882351B (en) * | 2017-05-15 | 2021-09-14 | 瑞昱半导体股份有限公司 | Gain adjustment method for wireless communication |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534887A (en) * | 2003-04-01 | 2004-10-06 | 英华达股份有限公司 | Method of controlling power level of radio singal transmitted by radio communication device |
| CN1684441A (en) * | 2004-04-16 | 2005-10-19 | 三星电子株式会社 | System of wireless local area network based on transmit power control and method for controlling transmit power |
| CN1886909A (en) * | 2003-12-16 | 2006-12-27 | 英特尔公司 | Systems and methods for adjusting transmit power in wireless local area networks |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1534887A (en) * | 2003-04-01 | 2004-10-06 | 英华达股份有限公司 | Method of controlling power level of radio singal transmitted by radio communication device |
| CN1886909A (en) * | 2003-12-16 | 2006-12-27 | 英特尔公司 | Systems and methods for adjusting transmit power in wireless local area networks |
| CN1684441A (en) * | 2004-04-16 | 2005-10-19 | 三星电子株式会社 | System of wireless local area network based on transmit power control and method for controlling transmit power |
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