CN2697958Y

CN2697958Y - Control device for output power of wireless network access point

Info

Publication number: CN2697958Y
Application number: CN 200320123740
Authority: CN
Inventors: 杨志祥
Original assignee: Mitac International Corp
Current assignee: Mitac International Corp
Priority date: 2003-11-28
Filing date: 2003-11-28
Publication date: 2005-05-04
Anticipated expiration: 2013-11-28

Abstract

A control device of wireless network Access Point output power is configured in an Access Point applied in a wireless area network, and is used for controlling the power of an output electric wave of the Access Point, namely when the external magnetic field interference is too large to influence the transmission of a wireless signal, the power of the output electric wave is increased through the output power control device, otherwise, when the Access Point detects that the intensity of the received wireless signal is large enough, the output power control device is informed to maintain the power of the output electric wave, so as to achieve the purpose of saving power supply.

Description

The control device of wireless network access point power output

[technical field]

The present invention is a kind of control device of wireless network access point power output, particularly a kind of control device of adjusting the radiofrequency signal power output.

[background technology]

Known, radio area network becomes the main flow of network service gradually, the framework of radio area network mainly is after plugging wireless network card on the PC, by the contiguous access point (Access Point) of this wireless network card search, after waiting to search access point, can carry out the transmission of wireless signal with access point, be connected to wired Local Area Network (LAN) by this access point again, thereby reach the purpose of radio area network (WLAN).

Yet, when PC and access point carry out radio communication, usually because outside magnetic interference, or because all factors such as hypertelorism of PC and access point, and the not enough problem of the radio-frequency (RF) signal strength that causes access point to launch.

Thus, devices such as power amplifier just occurred in access point, installing additional, be used for amplifying the power output of radiofrequency signal, thereby solve above-mentioned defective.

, because the power output of access point is fixed, when PC is positioned at the range of signal of a plurality of access points, the problem of phase mutual interference just often occurs, present way normally installs an oriented antenna additional and improves this problem.

But, thus, not only increased cost and because no matter access point all can increase the power of output signal under which kind of situation, not less than the power supply of having wasted access point.

[summary of the invention]

Main purpose of the present invention is the control device that a kind of wireless network access point power output is provided, by this control device when radio-frequency (RF) signal strength is too small, increase the power output of radiofrequency signal, and when radio-frequency (RF) signal strength is excessive, reduce the power output of radiofrequency signal.

In order to achieve the above object, the control device of wireless network access point power output of the present invention, be to be configured in one to be applied in the access point (Access Point) of radio area network, it includes a control unit, a transceiver, one first radio-frequency (RF) switch, one first power amplifier, one second radio-frequency (RF) switch, one second power amplifier, a duplexer and an antenna and forms.

Desire emitting radio frequency signal to outside or when receiving outside radiofrequency signal when the radio area network access point, promptly output control signals to duplexer, and order this duplexer control antenna to open start by control unit.

If the intensity that access point detects radiofrequency signal is during less than a preset value, control unit promptly outputs control signals to first radio-frequency (RF) switch and second radio-frequency (RF) switch, then control unit is after transceiver transmitting radio frequency signal to the first radio-frequency (RF) switch, by first radio-frequency (RF) switch with radio signal transmission to the first power amplifier, then export second radio-frequency (RF) switch to after the power amplification of first power amplifier with radiofrequency signal, second radio-frequency (RF) switch again with the input radio signal transmission to duplexer, by duplexer radiofrequency signal is emitted to the outside through antenna at last.

If access point detects the intensity of radiofrequency signal and has arrived a preset value, control unit promptly outputs control signals to first radio-frequency (RF) switch and second radio-frequency (RF) switch, then from controlling the unit after transceiver transmits radiofrequency signal to the first radio-frequency (RF) switch, by first radio-frequency (RF) switch radiofrequency signal is directly transferred to second radio-frequency (RF) switch, again by second radio-frequency (RF) switch with radio signal transmission to duplexer, by duplexer radiofrequency signal is emitted to the outside through antenna at last.

And after antenna receives outside radiofrequency signal, with radio signal transmission to duplexer, again by duplexer with radio signal transmission to the second power amplifier, then second power amplifier with the input the radiofrequency signal amplifying power after export transceiver to, at last by transceiver with radio signal transmission to control unit.

[description of drawings]

For making purpose of the present invention, structural feature and function thereof there are further understanding, cooperate diagram to be described in detail as follows below:

Fig. 1 is a circuit box schematic diagram of the present invention.

[embodiment]

Please refer to shown in Figure 1, be circuit box schematic diagram of the present invention, as shown in the figure: the control device of this wireless network access point power output, be in the access point (Access Point) that is disposed at a radio area network, power in order to control access point (not shown) output radiofrequency signal, just disturb excessive and when having influence on radio signal transmission when the external magnetic field, promptly increase the power of output signal by output power control device of the present invention, otherwise, if when access point detection radio-frequency (RF) signal strength is enough big, the power of promptly notifying output power control device to keep output signal is to reach the purpose of saving power supply.

The control device of wireless network access point power output of the present invention is to include a control unit 11, a transceiver 12, one first radio-frequency (RF) switch 13, one first power amplifier 14, one second radio-frequency (RF) switch 15, one second power amplifier 16, a duplexer 17 and an antenna 18 to form.

This control unit 11 is the single-chips that include fundamental frequency processor (baseband processor) and medium access controller (Medium Access Controller) for.

This transceiver 12 is to be connected to control unit 11, in order to receive and emitting radio frequency signal.

This first radio-frequency (RF) switch 13 is to be connected to transceiver 12 and control unit 11, in order to the circulation of control radiofrequency signal.

This first power amplifier 14 is to be connected to first radio-frequency (RF) switch 13, in order to exporting behind the radiofrequency signal amplifying power of first radio-frequency (RF) switch, 13 inputs.

This second radio-frequency (RF) switch 15 is to be connected to first power amplifier 14 and control unit 11, in order to the circulation of control radiofrequency signal.

This duplexer 17 is to be connected to second radio-frequency (RF) switch 15 and control unit 11, in order to the unlatching start of control antenna 18.

This antenna 18 is to be connected to duplexer 17, the extremely outside and outside radiofrequency signal of reception in order to emitting radio frequency signal.

This second power amplifier 16 is to be connected to duplexer 17, in order to exporting transceiver 12 to behind the radiofrequency signal amplifying power that antenna 18 receives.

When the radio area network access point is desired emitting radio frequency signal to the outside, promptly output control signals to duplexer 17, and order this duplexer 17 control antennas 18 to open starts by control unit 11.

At this moment, if access point detects that radiofrequency signal is interfered or signal strength signal intensity when too small, control unit 11 promptly outputs control signals to first radio-frequency (RF) switch 13 and second radio-frequency (RF) switch 15, then control the radiofrequency signal of unit 11 outputs certainly after transceiver 12 transfers to first radio-frequency (RF) switch 13, again by first radio-frequency (RF) switch 13 with radio signal transmission to the first power amplifier 14, then export second radio-frequency (RF) switch 15 to after first power amplification of power amplifier 14 with radiofrequency signal, second radio-frequency (RF) switch 15 with the input radio signal transmission to duplexer 17, by duplexer 17 radiofrequency signal is emitted to the outside through antenna 18 again.

Otherwise, if access point detects the intensity of radiofrequency signal and has arrived a preset value, control unit 11 promptly outputs control signals to first radio-frequency (RF) switch 13 and second radio-frequency (RF) switch 15, then control the radiofrequency signal of unit 11 outputs certainly after transceiver 12 is sent to first radio-frequency (RF) switch 13, by first radio-frequency (RF) switch 13 radiofrequency signal is directly transferred to second radio-frequency (RF) switch 15, again by second radio-frequency (RF) switch 15 with radio signal transmission to duplexer 17, by duplexer 17 radiofrequency signal is emitted to the outside through antenna 18 at last.

In addition, when radio area network access point desire receives outside radiofrequency signal, promptly output control signals to duplexer 17, and order these duplexer 17 control antennas 18 to open start by control unit 11.

At this moment, after the outside radiofrequency signal of antenna 18 receptions, with radio signal transmission to duplexer 17, again by duplexer 17 with radio signal transmission to the second power amplifier 16, then second power amplifier 16 with the input the radiofrequency signal amplifying power after export transceiver 12 to, at last by transceiver 12 with radio signal transmission to control unit 11.

Though the present invention discloses as above with aforesaid preferred embodiment; so it is not in order to limit practical range of the present invention; be not to be used for limiting practical range of the present invention; any personnel that are familiar with this technical field; similar variation and the modification in not breaking away from spirit of the present invention and claims scope, done; therefore be all claim of the present invention and contain, scope of patent protection of the present invention must be looked these claims scope person of defining and is as the criterion.

Claims

1. A control device for wireless network access point output power, which is arranged on a wireless network access point, in order to control the power of the access point output radio frequency signal, it is characterized in that, comprising:

a control unit, which is used to send a control signal to control the output power of the radio frequency signal;

a transceiver connected to the control unit for transmitting and receiving radio frequency signals;

a first radio frequency switch, connected to the control unit and the transceiver, for receiving the control signal sent by the control unit to control the flow of radio frequency signals;

A first power amplifier, connected to the first radio frequency switch, for amplifying the power of the input radio frequency signal and outputting it;

a second radio frequency switch, connected to the control unit and the first power amplifier, for receiving the control signal sent by the control unit to control the flow of radio frequency signals; and

An antenna, connected to the second radio frequency switch, is used for transmitting radio frequency signals to the outside and receiving external radio frequency signals.

2. The device for controlling output power of a wireless network access point according to claim 1, wherein when the access point detects that the strength of the radio frequency signal reaches a preset value, the control unit outputs a control signal to For the first radio frequency switch and the second radio frequency switch, after the control unit transmits radio frequency signals to the first radio frequency switch through the transceiver, the radio frequency signals are directly transmitted to the second radio frequency switch through the first radio frequency switch, and then The radio frequency signal is transmitted to the antenna by the second radio frequency switch, and finally the radio frequency signal is transmitted to the outside by the antenna.

3. The device for controlling output power of a wireless network access point according to claim 1, wherein when the access point detects that the strength of the radio frequency signal is lower than a preset value, the control unit outputs a control signal to the first radio frequency switch and the second radio frequency switch, then the control unit transmits the radio frequency signal to the first radio frequency switch through the transceiver, and then transmits the radio frequency signal to the first power amplifier through the first radio frequency switch, the The first power amplifier amplifies the input radio frequency signal and outputs it to the second radio frequency switch, then the second radio frequency switch transmits the radio frequency signal to the antenna, and finally the antenna transmits the radio frequency signal to the outside.

4. The device for controlling output power of a wireless network access point according to claim 1, wherein the control unit is a single chip including a baseband processor and a media access controller.

5. The control device of the wireless network access point output power according to claim 1, further comprising an antenna switch, the antenna switch being connected to the control unit and the second radio frequency switch for controlling the antenna opening action.

6. The device for controlling the output power of a wireless network access point according to claim 5, wherein when the access point intends to transmit a radio frequency signal to the outside or receive an external radio frequency signal, the control unit outputs the control signal to the antenna switch, and command the antenna switch to control the antenna to turn on.

7. The control device of the wireless network access point output power according to claim 1, further comprising a second power amplifier, the second power amplifier is connected to the antenna, and receives external radio frequency through the antenna After receiving the signal, the radio frequency signal is transmitted to the second power amplifier, and then the second power amplifier amplifies the power of the input radio frequency signal and outputs it to the transceiver, and finally transmits the radio frequency signal to the control unit through the transceiver.