CN101242282B - An user access device and wireless LAN system including this device - Google Patents
An user access device and wireless LAN system including this device Download PDFInfo
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- CN101242282B CN101242282B CN2008100577437A CN200810057743A CN101242282B CN 101242282 B CN101242282 B CN 101242282B CN 2008100577437 A CN2008100577437 A CN 2008100577437A CN 200810057743 A CN200810057743 A CN 200810057743A CN 101242282 B CN101242282 B CN 101242282B
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Abstract
The invention provides a user access device and a wireless LAN system including the same. The device comprises an antenna, and further comprises: a mainframe terminal device, and an equipment terminal device connected with the mainframe terminal device through connection devices disposed at both sides of a twisted pair. The mainframe terminal device comprises: an interface device for connecting to the terminal, and a first transfer circuit for two-way transferring the terminal signal and the twisted pair signal. The equipment terminal device comprises: a connector for connecting the antenna, and a second transfer circuit for two-way transferring the radio frequency signal and the twisted pair signal, wherein the twisted pair transfers a digital baseband signal, the connector of the equipment terminal device is connected to the antenna through a radio frequency cable. The user access device has a long distance between the antenna and the user mainframe, so that the sender and the receiver for the wireless signal can be arranged indoor or outdoor with a little shield or a few reflecting objects.
Description
Technical field
The present invention relates to WLAN, long distance users access device of especially a kind of low-cost wireless local area network (LAN) (WiFi) and wireless local area network (WLAN) system.
Background technology
WiFi is also referred to as WLAN, and its network generally is made up of access point apparatus and user access device.Access point apparatus is accomplished the access of WLAN to cable network.User access device is also referred to as wireless network card, and it accomplishes user terminal, and computer for example is with the radio communication of access point apparatus.
WLAN (WiFi) has extensive use; For example the WLAN in China rural area inserts in the application, in a village, places an access point apparatus in higher place usually; And each user's customer access equipment is dispersed in everywhere, and is far away apart from access point apparatus usually.Since distant apart from access point apparatus, can send well and received RF signal so just hope wireless network card.
The wireless network card that is connected to computer at present is inserted in the slot of computer usually, can not move.Because near reflected by objects cabinet and the network interface card causes the aerial radiation of wireless network card insufficient, has influenced the effect that transmits and receives of wireless network card.A kind of in addition existing wireless network card such as Chinese patent CN02237953.3 separate wireless network card and its antenna through shielding conductor, and wherein wireless network card is inserted in the slot in the computer cabinet, and antenna is installed on the cabinet casing lateral surface to improve communication quality.Yet; Shielding conductor is from the antenna transmission to the network interface card and from network interface card, to be transferred to radiofrequency signal antenna and to go out through antenna transmission; Shielding conductor has retrained employed shielding conductor length in the 2.4Ghz frequency range to the decay of radiofrequency signal can not be oversize; Oversize if (for example will antenna be put into the length of 10 meters of outdoor needs), the consequently actual useful power output that arrives antenna have only the network interface card power output 1/10～1/100 in addition lower, can't accomplish radio communication.A kind of in addition existing wireless network card is the USB wireless network card, and is as shown in Figure 1, in common computer 1A, has a plurality of preposition usb 1 B or a plurality of rearmounted usb 1 E usually.Wireless network card 1D with USB interface directly inserts USB interface of computer perhaps is connected to master computer through a USB extended line 1F usb 1 B, and USB extended line 1F also has a base 1C usually, can wireless network card 1D be inserted into and fix.This technology adopts the USB extended line that the USB network interface card is broken away from the constraint of the slot that is positioned at computer cabinet, but the shortcoming of this connected mode is a wireless network card can only be placed on computer near the position, can't be placed on farther position or outdoor.Because according to the usb data host-host protocol, the length of USB extended line is less than 4.8 meters usually, so though the communication efficiency of this prior art have some improvement, but still not ideal enough, can not satisfy the user antenna is arranged on more needs at a distance easily.
Summary of the invention
The objective of the invention is to deficiency, long distance users access device of the low WLAN of a kind of cost and wireless local area network (WLAN) system are provided to prior art.This device makes to have long distance between antenna and the user terminal, conveniently wireless signal is sent receiving unit is put into apart from far away local even outdoor in terminal, realizes that user access device communicates by letter with the outdoor access point of distant place.
In order to achieve the above object, the present invention provides following technical scheme:
A kind of wireless local network user access device comprises antenna, also comprises:
The main frame arrangements of terminal, with the arrangement terminal device that is connected with said main frame arrangements of terminal through the jockey that is positioned at the twisted-pair feeder two ends, wherein,
Said main frame arrangements of terminal comprises: be used to be connected to the interface arrangement at terminal, be used for the signal of the signal at said terminal and twisted-pair feeder transmission is carried out first change-over circuit of bi-directional conversion, wherein, the twisted-pair feeder transmission be digital baseband signal;
Said arrangement terminal device comprises: be used to connect the connecting elements of said antenna, be used for the signal of the radiofrequency signal of said antenna and twisted-pair feeder transmission is carried out second change-over circuit of bi-directional conversion; And
Radio frequency cable, the connecting elements of wherein said arrangement terminal device is connected to said antenna through said radio frequency cable.
Preferably, described jockey comprises the feedback point or the screwed union of RJ45 joint, welding manner.
Preferably, described interface arrangement comprises USB interface.
Preferably, said connecting elements comprises the feedback point or the screwed union of SMA antenna terminal, welding manner.
Preferably, said arrangement terminal device also comprises power input, is used to be connected to external power source and power supply is provided for said second change-over circuit.
Preferably, said main frame arrangements of terminal also comprises power input, is used to be connected to external power source and power supply is provided for said arrangement terminal device through twisted-pair feeder.
Preferably, said twisted-pair feeder is the Ethernet netting twine.
Preferably, also comprise support bar, be used to support said arrangement terminal device and said antenna.
Preferably, said jockey is the RJ45 joint, and said interface arrangement is a USB interface, and said main frame arrangements of terminal also comprises:
The RJ45 interface is used to admit the said RJ45 joint of said twisted-pair feeder one end and is connected to said first change-over circuit;
The USB extended line, the one of which end connects said USB interface, and the other end is connected to said terminal;
Power input is used to connect external power source, and supplies power to said arrangement terminal device through twisted-pair feeder.
Preferably, said jockey is the RJ45 joint, and said connecting elements is the SMA antenna terminal, and said arrangement terminal device also comprises:
The RJ45 interface is used to admit the said RJ45 joint of said twisted-pair feeder one end and is connected to said second change-over circuit.
A kind of wireless local area network (WLAN) system comprises access point apparatus, user access device and terminal; Said access point apparatus is used to accomplish the access of WLAN to cable network; Said terminal is connected with said user access device, and communicates by letter with said access point apparatus through this user access device; Said user access device comprises antenna, and also comprises:
The main frame arrangements of terminal, with the arrangement terminal device that is connected with said main frame arrangements of terminal through the jockey that is positioned at the twisted-pair feeder two ends, wherein,
Said main frame arrangements of terminal comprises: be used to be connected to the interface arrangement at said terminal and be used for the signal of the signal at said terminal and twisted-pair feeder transmission is carried out first change-over circuit of bi-directional conversion, wherein, the twisted-pair feeder transmission be digital baseband signal;
Said arrangement terminal device comprises: be used to connect the connecting elements of antenna and be used for the signal of the radiofrequency signal of said antenna and twisted-pair feeder transmission is carried out second change-over circuit of bi-directional conversion; And
Radio frequency cable, the connecting elements of wherein said arrangement terminal device is connected to said antenna through said radio frequency cable.
Compared with prior art, useful technique effect of the present invention is:
Has long distance between the antenna of user access device of the present invention and the subscriber's main station; To be positioned over shielding less or that reflecting object is less is indoor or outdoor with the part that transmits and receives of wireless signal, and the effect that transmits and receives of wireless signal is well improved.
Description of drawings
Fig. 1 is the connection layout at existing USB wireless network card and terminal;
Fig. 2 is the connection layout at wireless local network user access device of the present invention and terminal;
Fig. 3 is a main frame arrangements of terminal inner plane structural representation of the present invention;
Fig. 4 is an arrangement terminal device inner plane structural representation of the present invention.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and embodiment, to wireless local network user access device of the present invention further explain.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In general; For example the WLAN in China rural area inserts in the application; For fear of the signal shielding effect in house, hope to be more preferably and can wireless network card to be placed on the position farther apart from the terminal, for example preferably can be put into the radiofrequency signal transmission and the receiving unit (being antenna) of network interface card outdoor; Even be put into outdoor higher position, could effectively improve customer access equipment and the outdoor communication quality of the access point apparatus of distant place.
Under above-mentioned application scenarios; As a kind of enforceable mode, for example in a village, place an access point apparatus in higher place usually; It often comprises antenna part; Be used to send radiofrequency signal and from the customer access equipment received RF signal, and each user's customer access equipment is dispersed in everywhere, far away apart from access point apparatus usually.Since distant apart from access point apparatus, can send well and received RF signal so just hope wireless network card.Utilize wireless local network user access device provided by the invention, the user can receive the radiofrequency signal of this device and transmitting section is set to outdoorly, even is set to outdoor higher position, thereby can carries out radio communication with access point apparatus well.
As shown in Figure 2, as a kind of enforceable mode, wireless local network user access device of the present invention comprises:
Main frame arrangements of terminal 2D and arrangement terminal device 2E link together through the jockey that is positioned at twisted-pair feeder 2H two ends between them; Arrangement terminal device 2E is connected to antenna 2K.Farther for what signal was propagated, as a kind of execution mode, antenna 2K can adopt directional antenna.
As a kind of mode of enforcement, described jockey comprises the feedback point or the screwed union of RJ45 joint, welding manner.
The main frame arrangements of terminal comprises: the USB interface device that is used to be connected to user terminal (for example master computer) be used for first change-over circuit that the conversion of signals of self terminal in the future becomes twisted-pair feeder signal and reverse conversion; Said reverse dress changes and is about to the signal that the twisted-pair feeder conversion of signals becomes input terminal.The implementation of first change-over circuit adopts prior art.The power supply of first change-over circuit can be supplied with by the terminal.
The arrangement terminal device comprises: the connecting elements and second change-over circuit that is used for the radiofrequency signal from antenna is converted to twisted-pair feeder signal and reverse conversion that are used to connect antenna.Reverse conversion described herein is about to the radiofrequency signal that the twisted-pair feeder conversion of signals becomes to be defeated by antenna.The implementation of second change-over circuit adopts prior art.Owing to what transmit at twisted-pair feeder is digital baseband signal, has avoided using the significant signal decay of longer shielding conductor.
As a kind of mode of enforcement, said connecting elements is the feedback point or the screwed union of miniature A (SMA, SubMiniature versionA) antenna terminal, welding manner.
As the enforceable mode of another kind, said arrangement terminal device also comprises a power input, is used for power supply to said second change-over circuit being provided.
As the enforceable mode of another kind, above-mentioned power input is arranged on the said main frame arrangements of terminal, be used for power supply being provided for second change-over circuit of said arrangement terminal device through twisted-pair feeder.As shown in Figure 2; Main frame arrangements of terminal 2D is connected with the terminal through USB extended line 2F; Main frame arrangements of terminal 2D is through USB extended line 2F picked up signal and power supply; The signal that the main frame arrangements of terminal obtains from the terminal is the digital baseband signal of the suitable USB extended line transmission of USB prescribed by standard, is converted into the digital baseband signal that is fit to the transmission of Ethernet netting twine through first change-over circuit.In order to supply more electric current to arrangement terminal device 2E, main frame arrangements of terminal 2D is provided with external dc supply input 2J.Adopt netting twine as twisted-pair feeder 2H, its inside comprises 8 lines, and a couple wherein is used for transmission signals, and other three pairs are used for transmitting DC power supply, are arrangement terminal device 2E power supply.Among Fig. 2, through being connected to the high-gain aerial 2K on the arrangement terminal device 2E, can transfer signals to farther distance, this signal is a radio frequency signal.The present invention also comprises support bar 2G, is used for arrangement terminal device 2E and antenna 2K are fixed on signal position preferably.The typical application of structure shown in Figure 2 is that to make up with the natural village in China rural area be the user access device of village's area wireless network of unit.But the invention is not restricted to this.
Fig. 3 expresses and adopts main frame arrangements of terminal inner plane structural representation of the present invention.As shown in Figure 3; Main frame arrangements of terminal 2D inside comprises that a RJ45 interface 3D is used to connect the RJ45 joint of twisted-pair feeder one end; A USB-B interface 3A is used to connect the USB extended line; A power interface 3B is connected with the end of dc supply input 2J, and the other end connects external power source, can directly supply power to the arrangement terminal device to twisted-pair feeder and through twisted-pair feeder; One first change-over circuit 3C realizes the bi-directional conversion of usb signal and twisted-pair feeder signal, and the bi-directional conversion of usb signal and twisted-pair feeder signal adopts known circuit to realize.
Fig. 4 expresses and adopts arrangement terminal device inner plane structural representation of the present invention.As shown in Figure 4; Arrangement terminal device 2E inside comprises that a RJ45 interface 4A is used to connect the RJ45 joint of twisted-pair feeder one end; A sub-miniature A connector 4E is used to connect antenna; And one second change-over circuit 4C realizes the bi-directional conversion of twisted-pair feeder signal and WLAN (WiFi) radiofrequency signal, and the known circuit of bi-directional conversion employing of twisted-pair feeder signal and WLAN (WiFi) radiofrequency signal can be realized.
As the enforceable mode of another kind, on the basis of technique scheme, wireless local network user access device of the present invention also comprises: the connecting elements of arrangement terminal device is connected to antenna through radio frequency cable; As a kind of execution mode, this connecting elements can be the feedback point or the screwed union of SMA antenna terminal, welding manner.The benefit of doing like this is the transmission range of radiofrequency signal between antenna and arrangement terminal device that extended; Thereby make antenna can further strengthen to the distance at terminal; It is local preferably that thereby convenient user is arranged on signal with antenna, and the signal quality of radio communication is provided.
User access device of the present invention, each element all can adopt existing product, and it is cheap, makes that installation cost of the present invention is lower.The long distance users access device of low-cost wireless WiFi of the present invention is a kind of novel network interface card, is whole device is divided into two parts with the difference of prior art, the radio frequency signal R-T unit of having realized network interface card no longer retrain with the terminal near.When access point in outdoor place far away, can the arrangement terminal device be put into outdoor eminence, thereby realize that user terminal and the outdoor access point of distant place communicate.
As a kind of execution mode, in order to reach the object of the invention, a kind of wireless local area network (WLAN) system that contains user access device of the present invention is provided also, comprise access point apparatus and terminal, wherein:
Access point apparatus is used to accomplish the access of WLAN to cable network;
Said terminal is connected with user access device, and communicates by letter with said access point apparatus through this user access device;
As shown in Figure 2, said user access device comprises:
Main frame arrangements of terminal 2D and arrangement terminal device 2E link together through the jockey that is positioned at twisted-pair feeder 2H two ends between them; Arrangement terminal device 2E is connected to antenna 2K.Farther for what signal was propagated, as a kind of execution mode, antenna 2K can adopt directional antenna.As a kind of mode of enforcement, described jockey comprises the feedback point or the screwed union of RJ45 joint, welding manner.
The main frame arrangements of terminal comprises: the USB interface device that is used to be connected to user terminal be used for first change-over circuit that the conversion of signals of self terminal in the future becomes twisted-pair feeder signal and reverse conversion; Said reverse dress changes and is about to the signal that the twisted-pair feeder conversion of signals becomes input terminal.The implementation of first change-over circuit adopts prior art.The power supply of first change-over circuit can be supplied with by the terminal.
The arrangement terminal device comprises: the connecting elements and second change-over circuit that is used for the radiofrequency signal from antenna is converted to twisted-pair feeder signal and reverse conversion that are used to connect antenna.Reverse conversion described herein is about to the radiofrequency signal that the twisted-pair feeder conversion of signals becomes to be defeated by antenna.The implementation of second change-over circuit adopts prior art.Owing to what transmit at twisted-pair feeder is digital baseband signal, has avoided using the significant signal decay of longer shielding conductor.
As a kind of mode of enforcement, said connecting elements comprises the feedback point or the screwed union of SMA antenna terminal, welding manner.
As the enforceable mode of another kind, said arrangement terminal device also comprises a power input, is used for power supply to said second change-over circuit being provided.
As the enforceable mode of another kind, above-mentioned power input is arranged on the said main frame arrangements of terminal, be used for power supply being provided for second change-over circuit of said arrangement terminal device through twisted-pair feeder.As shown in Figure 2; Main frame arrangements of terminal 2D is connected with the terminal through USB extended line 2F; Main frame arrangements of terminal 2D is through USB extended line 2F picked up signal and power supply; The signal that the main frame arrangements of terminal obtains from the terminal is the digital baseband signal of the suitable USB extended line transmission of USB prescribed by standard, is converted into the digital baseband signal that is fit to the transmission of Ethernet netting twine through first change-over circuit.In order to supply more electric current to arrangement terminal device 2E, main frame arrangements of terminal 2D is provided with external dc supply input 2J.Adopt netting twine as twisted-pair feeder 2H, its inside comprises 8 lines, and a couple wherein is used for transmission signals, and other three pairs are used for transmitting DC power supply, are arrangement terminal device 2E power supply.Among Fig. 2, through being connected to the high-gain aerial 2K on the arrangement terminal device 2E, can transfer signals to farther distance, this signal is a radio frequency signal.This system also comprises support bar 2G, is used for arrangement terminal device 2E and antenna 2K are fixed on signal position preferably.
Fig. 3 expresses main frame arrangements of terminal inner plane structural representation.As shown in Figure 3; Main frame arrangements of terminal 2D inside comprises that a RJ45 interface 3D is used to connect the RJ45 joint of twisted-pair feeder one end; A USB-B interface 3A is used to connect the USB extended line; A power interface 3B is connected with the end of dc supply input 2J, and the other end connects external power source, can directly supply power to the arrangement terminal device to twisted-pair feeder and through twisted-pair feeder; One first change-over circuit 3C realizes the bi-directional conversion of usb signal and twisted-pair feeder signal, and the bi-directional conversion of usb signal and twisted-pair feeder signal adopts known circuit to realize.
Fig. 4 expresses arrangement terminal device inner plane structural representation.As shown in Figure 4; Arrangement terminal device 2E inside comprises that a RJ45 interface 4A is used to connect the RJ45 joint of twisted-pair feeder one end; A sub-miniature A connector 4E is used to connect antenna; And one second change-over circuit 4C realizes the bi-directional conversion of twisted-pair feeder signal and WLAN (WiFi) radiofrequency signal, and the known circuit of bi-directional conversion employing of twisted-pair feeder signal and WLAN (WiFi) radiofrequency signal can be realized.
The typical application of wireless local area network (WLAN) system provided by the invention is that to make up with the natural village in China rural area be village's area wireless network of unit.But the invention is not restricted to this.
The above content; Be merely the concrete execution mode of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed in protection scope of the present invention.
Claims (20)
1. a wireless local network user access device comprises antenna, it is characterized in that, also comprises:
Main frame arrangements of terminal and arrangement terminal device, both connect through the jockey that is positioned at the twisted-pair feeder two ends, wherein,
Said main frame arrangements of terminal comprises: be used to be connected to the interface arrangement of user terminal and be used for the signal of the signal of said user terminal and twisted-pair feeder transmission is carried out first change-over circuit of bi-directional conversion, wherein, the twisted-pair feeder transmission be digital baseband signal;
Said arrangement terminal device comprises: be used to connect the connecting elements of said antenna and be used for the signal of the radiofrequency signal of said antenna and twisted-pair feeder transmission is carried out second change-over circuit of bi-directional conversion; And
Radio frequency cable, the connecting elements of wherein said arrangement terminal device is connected to said antenna through said radio frequency cable.
2. wireless local network user access device according to claim 1 is characterized in that, described jockey comprises the feedback point or the screwed union of RJ45 joint, welding manner.
3. wireless local network user access device according to claim 1 is characterized in that described interface arrangement comprises USB interface.
4. wireless local network user access device according to claim 1 is characterized in that, said connecting elements comprises the feedback point or the screwed union of SMA antenna terminal, welding manner.
5. wireless local network user access device according to claim 1 is characterized in that, said arrangement terminal device also comprises power input, is used to be connected to external power source and power supply is provided for said second change-over circuit.
6. wireless local network user access device according to claim 1 is characterized in that, said main frame arrangements of terminal also comprises power input, is used to be connected to external power source and power supply is provided for said arrangement terminal device through twisted-pair feeder.
7. wireless local network user access device according to claim 1 is characterized in that, said twisted-pair feeder is the Ethernet netting twine.
8. wireless local network user access device according to claim 1 is characterized in that, also comprises support bar, is used to support said arrangement terminal device and said antenna.
9. wireless local network user access device according to claim 1 is characterized in that, said jockey is the RJ45 joint, and said interface arrangement is a USB interface, and said main frame arrangements of terminal also comprises:
The RJ45 interface is used to admit the RJ45 joint of said twisted-pair feeder one end and is connected to said first change-over circuit;
The USB extended line, the one of which end connects said USB interface, and the other end is connected to said user terminal;
Power input is used to connect external power source, and supplies power to said arrangement terminal device through twisted-pair feeder.
10. wireless local network user access device according to claim 1 is characterized in that, said jockey is the RJ45 joint, and said connecting elements is the SMA antenna terminal, and said arrangement terminal device also comprises:
The RJ45 interface is used to admit the RJ45 joint of said twisted-pair feeder one end and is connected to said second change-over circuit.
11. a wireless local area network (WLAN) system comprises access point apparatus, user access device and user terminal; Said access point apparatus is used to accomplish the access of WLAN to cable network; Said user terminal is connected with said user access device, and communicates by letter with said access point apparatus through this user access device; Said user access device comprises antenna; It is characterized in that said user access device also comprises:
Main frame arrangements of terminal and arrangement terminal device, both connect through the jockey that is positioned at the twisted-pair feeder two ends, wherein,
Said main frame arrangements of terminal comprises: be used to be connected to the interface arrangement of user terminal and be used for the signal of the signal of said user terminal and twisted-pair feeder transmission is carried out first change-over circuit of bi-directional conversion, wherein, the twisted-pair feeder transmission be digital baseband signal;
Said arrangement terminal device comprises: be used to connect the connecting elements of said antenna and be used for the signal of the radiofrequency signal of said antenna and twisted-pair feeder transmission is carried out second change-over circuit of bi-directional conversion; And
Radio frequency cable, the connecting elements of wherein said arrangement terminal device is connected to said antenna through said radio frequency cable.
12. wireless local area network (WLAN) system according to claim 11 is characterized in that, described jockey comprises the feedback point or the screwed union of RJ45 joint, welding manner.
13. wireless local area network (WLAN) system according to claim 11 is characterized in that, described interface arrangement comprises USB interface.
14. wireless local area network (WLAN) system according to claim 11 is characterized in that, said connecting elements comprises the feedback point or the screwed union of SMA antenna terminal, welding manner.
15. wireless local area network (WLAN) system according to claim 11 is characterized in that, said arrangement terminal device also comprises power input, is used to be connected to external power source and power supply is provided for said second change-over circuit.
16. wireless local area network (WLAN) system according to claim 11 is characterized in that, said main frame arrangements of terminal also comprises power input, is used to be connected to external power source and power supply is provided for said arrangement terminal device through twisted-pair feeder.
17. wireless local area network (WLAN) system according to claim 11 is characterized in that, said twisted-pair feeder is the Ethernet netting twine.
18. wireless local area network (WLAN) system according to claim 11 is characterized in that, said user access device also comprises support bar, is used to support said arrangement terminal device and said antenna.
19. wireless local area network (WLAN) system according to claim 11 is characterized in that, said jockey is the RJ45 joint, and said interface arrangement is a USB interface, and said main frame arrangements of terminal also comprises:
The RJ45 interface is used to admit the RJ45 joint of said twisted-pair feeder one end and is connected to said first change-over circuit;
The USB extended line, the one of which end connects said USB interface, and the other end is connected to said user terminal;
Power input is used to connect external power source, and supplies power to said arrangement terminal device through twisted-pair feeder.
20. wireless local area network (WLAN) system according to claim 11 is characterized in that, said jockey is the RJ45 joint, and said connecting elements is the SMA antenna terminal, and said arrangement terminal device also comprises:
The RJ45 interface is used to admit the RJ45 joint of said twisted-pair feeder one end and is connected to said second change-over circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100577437A CN101242282B (en) | 2008-02-14 | 2008-02-14 | An user access device and wireless LAN system including this device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100577437A CN101242282B (en) | 2008-02-14 | 2008-02-14 | An user access device and wireless LAN system including this device |
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| CN101242282A CN101242282A (en) | 2008-08-13 |
| CN101242282B true CN101242282B (en) | 2012-01-04 |
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| CN1224549A (en) * | 1996-04-19 | 1999-07-28 | Lgc无线股份有限公司 | Distribution of radio-frequency signals through low bandwidth infrastructure |
| CN2559034Y (en) * | 2002-06-19 | 2003-07-02 | 联想(北京)有限公司 | Radio network card connecting device |
| CN1731702A (en) * | 2005-08-10 | 2006-02-08 | 林志华 | Wimax carrier frequency remote transmission method |
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