CN1581814A - Wireless LAN indoor covering system - Google Patents
Wireless LAN indoor covering system Download PDFInfo
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- CN1581814A CN1581814A CN 03142030 CN03142030A CN1581814A CN 1581814 A CN1581814 A CN 1581814A CN 03142030 CN03142030 CN 03142030 CN 03142030 A CN03142030 A CN 03142030A CN 1581814 A CN1581814 A CN 1581814A
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Abstract
The system includes following parts: access point, through Ethernet is connected to local network or public network; at least more than one antenna, the antenna setup inside room through radio frequency cable is connected to access point; wireless LAN power amplifier setup between the said access point and each antenna for magnifying signal transferred between the access point and each antenna.
Description
Technical field
The present invention relates to the wireless local area network technology field, specifically, relate to a kind of Wireless LAN indoor covering system.
Background technology
WLAN (wireless local area network) (Wireless Local Area Network, WLAN) using the most general standard in the technology is IEEE (Institute of Electrical and Electric Engineers) 802.11 series standards, uses that the relevant ieee standard of 2.4GHz frequency band includes 802.11,802.11b, 802.11b+, 802.11g etc.The application of any local area network (LAN), network operating system or agreement (comprising internet protocol negotiation TCP/IP etc.) can be moved on the net at the wireless local that meets the IEEE802.11 series standard.
Wireless local area network (WLAN) system generally comprises adapter and access point (Access Point, AP) two parts.Adapter is connected with user terminal (for example computer equipment etc.), and access point (device) is connected with local network or public network through Ethernet.In the frequency band of 2.4G,,, thereby realize the wireless access of user terminal and network between adapter and the access point by antenna exchange message separately with time division multiplexing mode.
Present Wireless LAN indoor covering system or method are by IEEE 802.11 series standards, at the indoor access point of arranging everywhere, so that the user terminal that corresponding adapter has been installed inserts local network or public network with wireless mode in the scope that access point signals covers.Above-mentioned this coverage mode is called full access point mode, in this access way, because antenna all is installed on the access point, the overlay area of an access point is limited, therefore, for the blind area not occurring, in the overlay area, need to arrange a large amount of access points, these access points all will carry out line by network equipments such as traditional ethernet line and switch, hubs.Yet a large amount of wirings are very difficult in the building of having fitted up.And, the signal fadeout that complex environments such as indoor partition cause makes access point on average have only (coverage distance at outdoor open field is about 100 meters) about 20 meters at indoor coverage distance, this will cause under the situation of same coverage, the number of access point that indoor covering is required and the quantity of the network equipment increase greatly, have improved construction cost.
In addition, the increase of access point layout density makes frequency planning become complicated more.Also can cause simultaneously the mobile subscriber terminal moving process between each access point overlay area, frequently to switch, influence the mobile effect of user terminal and the stable operation of network.
Therefore, present single access point signals overlay area is the very crux that causes the problems referred to above for a short time.
Summary of the invention
Edge this, the objective of the invention is to, provide a kind of through improved Wireless LAN indoor covering system, this system can enlarge the signal coverage areas of access point effectively, reduces the quantity of access point, thereby reduces the laying and the construction cost of whole system.
As mentioned above, the subject matter of present Wireless LAN indoor covering system is that access point has only one pair of antenna that is arranged on the access point, and therefore, its overlay area is subjected to the restriction of antenna.Therefore, main improvement of the present invention is outside access point, set up antenna, the quantity of setting up can be one pair, also can be to overpay, be connected by radio frequency cable between the antenna of setting up and the access point, between antenna and access point, set up a wireless LAN power amplifier simultaneously, the signal attenuation that causes with the compensation radio frequency cable.After so improving, each access point can dispose the antenna more than at least one pair, has enlarged the overlay area of an access point effectively.
Therefore, according to above-mentioned purpose and above-mentioned design, Wireless LAN indoor covering system provided by the invention comprises:
Access point is connected with local network or public network by Ethernet;
Antenna more than at least one pair, described antenna is arranged on indoor, links to each other with described access point by radio frequency cable; And
Wireless LAN power amplifier is arranged between described access point and the described antenna, is used to amplify the signal that transmits between described access point and the described antenna.
In as above Wireless LAN indoor covering system, described access point comprises:
Radio frequency interface links to each other with described wireless LAN power amplifier by radio frequency cable;
Band pass filter links to each other with described radio frequency interface, and signal is carried out bandpass filtering;
Network interface is connected with described local network or public network by Ethernet;
Network interface controller links to each other with described network interface, is used to control the work of described network interface;
Base band/medium access controller links to each other with described network interface controller, is used to control the reception of access point or the switching of emission state;
Radio-frequency (RF) transceiver links to each other with described base band/medium access controller, carries out the transmitting-receiving of upward signal and downstream signal;
Downlink power amplifier, its input links to each other with described radio-frequency (RF) transceiver, is used to amplify downstream signal, and its output links to each other with described band pass filter, and the downstream signal through amplifying is offered described wireless LAN power amplifier; And
Transceiver toggle switch, the one end links to each other with described band pass filter, the other end has two switching points, link to each other with described downlink power amplifier with described radio-frequency (RF) transceiver respectively, the control end of described transceiver toggle switch links to each other with described base band/medium access controller, to switch the reiving/transmitting state of described access point.
In as above Wireless LAN indoor covering system, described access point also comprises:
The outer transmitting-receiving of band switching driver links to each other with described base band/medium access controller, is used for producing the outer transmitting-receiving of band switching signal; And
The outer transmitting-receiving of band switching interface is received and dispatched switching driver outward with described band and is linked to each other, and provides described band to receive and dispatch switching signal outward;
Described wireless LAN power amplifier comprises:
The access point radio frequency interface links to each other with described access point;
The access point band pass filter links to each other with described access point radio frequency interface;
The antenna radio frequency interface links to each other with described antenna;
The antenna band pass filter links to each other with described antenna radio frequency interface;
Low noise amplifier is connected between described access point band pass filter and the described antenna band pass filter, is used to amplify the upward signal that receives from described antenna;
Power amplifier is connected between described access point band pass filter and the described antenna band pass filter, is used to amplify the downstream signal that sends from described access point; And
The first and second upstream and downstream change over switches, the described first and second upstream and downstream change over switches are connected to described low noise amplifier and described power amplifier two ends, are used to switch described low noise amplifier and power amplifier and work respectively;
The control end of the described first and second upstream and downstream change over switches is received and dispatched switching interface outward with the described band of described access point and is linked to each other, and receives and dispatches switching signal outward according to described band and switches.
In as above Wireless LAN indoor covering system, described band is received and dispatched switching driver outward and is comprised RS422/RS485 STD bus driver.
In as above Wireless LAN indoor covering system, described band is received and dispatched switching driver outward and is comprised: inverter, the photoelectrical coupler that links to each other with described inverter and the RS422/RS485 STD bus driver that links to each other with described photoelectrical coupler.
Description of drawings
Describe specific embodiments of the invention in detail below in conjunction with accompanying drawing, in the accompanying drawing:
Fig. 1 is the structural representation of Wireless LAN indoor covering system of the present invention;
Fig. 2 is the functional-block diagram of access point shown in Figure 1;
Fig. 3 is the circuit diagram that band shown in Figure 2 is received and dispatched switching driver outward;
Fig. 4 is the circuit theory diagrams of wireless LAN power amplifier shown in Figure 1.
Embodiment
As shown in Figure 1, Wireless LAN indoor covering system of the present invention mainly comprises three parts:
Have network interface 1A, radio frequency interface 1B and the outer transmitting-receiving of band switching interface 1C on the access point 1.Network interface 1A is connected (not shown) by Ethernet with local network or public network, radio frequency interface 1B is connected by radio frequency cable 41 and wireless LAN power amplifier 2 (access point radio frequency interface 22), be used to transmit the uplink and downlink signal, the outer transmitting-receiving of band switching interface 1C is connected on the wireless LAN power amplifier 2 by control channel 5, be used to control the work of wireless LAN power amplifier 2, concrete control method will be described in detail below.
There is an antenna radio frequency interface 21 to be connected on the antenna 3 on the wireless LAN power amplifier 2 by radio frequency cable 42.
In Fig. 1, only show a wireless LAN power amplifier and one pair of antenna, but, be to be understood that, the present invention can be provided with plurality of antennas (shown in the dotted line among Fig. 1) as required on a wireless LAN power amplifier 2, connect by distributor 31 between every pair of antenna 3.Also a plurality of wireless LAN power amplifier can be set as required, each local area network (LAN) amplifier can insert one pair or plurality of antennas.These antenna can be laid in indoor different places as required, covers to carry out signal.
Fig. 2 shows the functional-block diagram of the access point among Fig. 1.As shown in Figure 2, access point includes: primary processor 11, base band/medium access controller 12, radio-frequency (RF) transceiver 13, downlink power amplifier 14, band pass filter 15, radio frequency interface 1B, network interface 1A, network interface controller 16 and transceiver toggle switch 17.All the access point with traditional is identical aspect internal structure and annexation for these functional blocks, below its structure and operation principle is done a simply description:
Radio frequency interface 1B links to each other with wireless LAN power amplifier 2 (as shown in Figure 1) by radio frequency cable 41, with and wireless LAN power amplifier 2 between carry out the transmission of signal;
Band pass filter 15 links to each other with radio frequency interface 1B, is used for signal (comprising upward signal and downstream signal) is carried out bandpass filtering;
Network interface 1A is connected with local network or public network by Ethernet;
Network interface controller 16 links to each other with network interface 1A, is used for the work of Control Network interface 1A;
Base band/medium access controller 12 links to each other with network interface controller 16, is used to control the reception of access point or the switching of emission state;
Radio-frequency (RF) transceiver 13 links to each other with base band/medium access controller 12, carries out the transmitting-receiving of upward signal and downstream signal;
Downlink power amplifier 14, its input links to each other with radio-frequency (RF) transceiver 13, is used to amplify downstream signal, and its output links to each other with band pass filter 15, and the downstream signal through amplifying is offered wireless LAN power amplifier;
Base band/medium access controller 12 is the devices that produce the reiving/transmitting state switching signal, and it according to the operating state of the present needs of access point, produces the reiving/transmitting state switching signal under the control of primary processor 11.When access point need enter transmit status (being downstream state), base band/medium access controller 12 produces a signal, digital signal 1 (high level) for example, the switch of control transceiver toggle switch 17 is connected to switching point b, in downlink power amplifier 14 places in circuit, access point enters downstream state; When access point need enter accepting state (being uplink state), base band medium access controller 12 produces another signal, digital signaling zero (low level) for example, the switch of control transceiver toggle switch 17 is connected to switching point a, downlink power amplifier 14 is disconnected, in the place in circuit, access point does not enter uplink state.
Above-mentioned structure and operation principle and traditional access point are basic identical, and Wireless LAN indoor covering system of the present invention has been done following improvement to this access point, have promptly increased a band and have received and dispatched switching driver 18 and the outer transmitting-receiving of band switching interface 1C outward.The outer transmitting-receiving of band switching driver 18 links to each other with base band/medium access controller 12, take out its switch-over control signal, done after the isolation drive, by being with outer transmitting-receiving switching interface 1C transmitting-receiving switching signal outside wireless LAN power amplifier 2 provides band, be used to control the work of wireless LAN power amplifier.
Fig. 3 shows a concrete circuit diagram of the outer transmitting-receiving of band switching driver.As shown in Figure 3, the outer transmitting-receiving of this band switching driver includes inverter A, photoelectrical coupler 18B and RS-422/RS-485 STD bus driver 18C, and these three parts connect with series system.Level was isolated before and after inverter 18A and photoelectrical coupler 18B play a part to get, and RS-422/RS-485 STD bus driver 18C is used to transmit this switching signal.Should be understood that for the lower occasion of ask for something the outer transmitting-receiving of band switching driver 18 also can only be made of RS-422/RS-485 STD bus driver, this STD bus driver also has certain buffer action.
See also Fig. 4, Fig. 4 shows the circuit theory diagrams of wireless LAN power amplifier.As shown in Figure 4, wireless LAN power amplifier comprises:
Access point radio frequency interface 22 links to each other with access point 1 (as shown in Figure 1);
Access point band pass filter 23 links to each other with access point radio frequency interface 22;
Antenna radio frequency interface 21, (referring to Fig. 1) links to each other with antenna 3;
Antenna band pass filter 24 links to each other with antenna radio frequency interface 21;
Low noise amplifier 25 is connected between access point band pass filter 23 and the antenna band pass filter 24, is used to amplify the upward signal that receives from antenna 3;
Power amplifier 26 is connected between access point band pass filter 23 and the antenna band pass filter 24, is used to amplify the downstream signal that sends from access point; And
The first and second upstream and downstream change over switches, 27,28, the first and second upstream and downstream change over switches 27,28 are connected to low noise amplifier 25 and power amplifier 26 two ends, are used to switch low noise amplifier 25 and power amplifier 26 is worked respectively;
The control end of the first and second upstream and downstream change over switches 27,28 is received and dispatched switching interface 1C (referring to Fig. 1) outward with the band of access point 1 and is linked to each other, and switches according to the outer transceiving switch-over control signal of band.
The front has been described access point and how have been produced the outer transceiving switch-over control signal of band, as mentioned above, the outer transceiving switch-over control signal of this band is synchronous with the access point 1 inner switch-over control signal that uses in fact, therefore, can be used for controlling wireless LAN power amplifier synchronouss working with access point.When this control signal is downstream state (transmit status), the first and second upstream and downstream change over switches 27 and 28 are connected in the loop power amplifier 26, wireless LAN power amplifier is obtained the signal that access point sends from access point radio frequency interface 22, be sent to antenna 3 through access point band pass filter 23, the first upstream and downstream diverter switch 27, power amplifier 26, the second upstream and downstream diverter switch 28, antenna band pass filter 24 and antenna radio frequency interface 21, outwards emission; When this control signal is uplink state (accepting state), the first and second upstream and downstream change over switches 27 and 28 are connected in the loop low noise amplifier 25, wireless LAN power amplifier is obtained the signal that receives from antenna point radio frequency interface 21, be sent to access point 1 through antenna band pass filter 24, the second upstream and downstream diverter switch 28, low noise amplifier 25, the first upstream and downstream diverter switch 27, access point band pass filter 23 and access point radio frequency interface 22, after access point is handled, be sent to local network or public network.
Describe specific embodiments of the invention above in detail, the detailed description of doing with reference to accompanying drawing above should be appreciated that is a better embodiment of the present invention, should not be regarded as any limitation of the invention.On the basis of above-mentioned design of the present invention, to various modifications that the present invention did, change in the protection range of the present invention that all should be regarded as determining by appending claims.
Claims (5)
1, a kind of Wireless LAN indoor covering system comprises:
Access point is connected with local network or public network by Ethernet;
Antenna more than at least one pair, described antenna is arranged on indoor, links to each other with described access point by radio frequency cable; And
Wireless LAN power amplifier is arranged between described access point and the described antenna, is used to amplify the signal that transmits between described access point and the described antenna.
2, Wireless LAN indoor covering system as claimed in claim 1 is characterized in that, described access point comprises:
Radio frequency interface links to each other with described wireless LAN power amplifier by radio frequency cable;
Band pass filter links to each other with described radio frequency interface, and signal is carried out bandpass filtering;
Network interface is connected with described local network or public network by Ethernet;
Network interface controller links to each other with described network interface, is used to control the work of described network interface;
Base band/medium access controller links to each other with described network interface controller, is used to control the reception of access point or the switching of emission state;
Radio-frequency (RF) transceiver links to each other with described base band/medium access controller, carries out the transmitting-receiving of upward signal and downstream signal;
Downlink power amplifier, its input links to each other with described radio-frequency (RF) transceiver, is used to amplify downstream signal, and its output links to each other with described band pass filter, and the downstream signal through amplifying is offered described wireless LAN power amplifier; And
Transceiver toggle switch, the one end links to each other with described band pass filter, the other end has two switching points, link to each other with described downlink power amplifier with described radio-frequency (RF) transceiver respectively, the control end of described transceiver toggle switch links to each other with described base band/medium access controller, to switch the reiving/transmitting state of described access point.
3, Wireless LAN indoor covering system as claimed in claim 2 is characterized in that, described access point also comprises:
The outer transmitting-receiving of band switching driver links to each other with described base band/medium access controller, is used for producing the outer transmitting-receiving of band switching signal; And
The outer transmitting-receiving of band switching interface is received and dispatched switching driver outward with described band and is linked to each other, and provides described band to receive and dispatch switching signal outward;
Described wireless LAN power amplifier comprises:
The access point radio frequency interface links to each other with described access point;
The access point band pass filter links to each other with described access point radio frequency interface;
The antenna radio frequency interface links to each other with described antenna;
The antenna band pass filter links to each other with described antenna radio frequency interface;
Low noise amplifier is connected between described access point band pass filter and the described antenna band pass filter, is used to amplify the upward signal that receives from described antenna;
Power amplifier is connected between described access point band pass filter and the described antenna band pass filter, is used to amplify the downstream signal that sends from described access point; And
The first and second upstream and downstream change over switches, the described first and second upstream and downstream change over switches are connected to described low noise amplifier and described power amplifier two ends, are used to switch described low noise amplifier and power amplifier and work respectively;
The control end of the described first and second upstream and downstream change over switches is received and dispatched switching interface outward with the described band of described access point and is linked to each other, and receives and dispatches switching signal outward according to described band and switches.
4, Wireless LAN indoor covering system as claimed in claim 3 is characterized in that, described band is received and dispatched switching driver outward and comprised RS422/RS485 STD bus driver.
5, Wireless LAN indoor covering system as claimed in claim 3, it is characterized in that described band is received and dispatched switching driver outward and comprised: inverter, the photoelectrical coupler that links to each other with described inverter and the RS422/RS485 STD bus driver that links to each other with described photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03142030 CN1581814A (en) | 2003-08-01 | 2003-08-01 | Wireless LAN indoor covering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03142030 CN1581814A (en) | 2003-08-01 | 2003-08-01 | Wireless LAN indoor covering system |
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| Publication Number | Publication Date |
|---|---|
| CN1581814A true CN1581814A (en) | 2005-02-16 |
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| CN 03142030 Pending CN1581814A (en) | 2003-08-01 | 2003-08-01 | Wireless LAN indoor covering system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358380C (en) * | 2005-03-11 | 2007-12-26 | 华为技术有限公司 | Indoor base station system |
| CN101663904B (en) * | 2006-12-22 | 2012-12-12 | Lgc无线公司 | System for and method of providing remote coverage area for wireless communications |
| CN103313434A (en) * | 2013-06-18 | 2013-09-18 | 福建星网锐捷网络有限公司 | Wireless access method, wireless access device, wireless access system, wireless access point device and antenna |
| WO2014029212A1 (en) * | 2012-08-20 | 2014-02-27 | 华为技术有限公司 | Antenna system |
| CN108111235A (en) * | 2014-09-28 | 2018-06-01 | 福建三元达网络技术有限公司 | A kind of method of work of multi-functional LTE wireless network cards |
| CN112601336A (en) * | 2020-12-31 | 2021-04-02 | 珠海雷特科技股份有限公司 | Long-distance data transmission method based on data bus and intelligent lamp control method |
| CN112751739A (en) * | 2020-12-31 | 2021-05-04 | 珠海雷特科技股份有限公司 | Long-distance data transmission device based on data bus and intelligent lamp control system |
-
2003
- 2003-08-01 CN CN 03142030 patent/CN1581814A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100358380C (en) * | 2005-03-11 | 2007-12-26 | 华为技术有限公司 | Indoor base station system |
| CN101663904B (en) * | 2006-12-22 | 2012-12-12 | Lgc无线公司 | System for and method of providing remote coverage area for wireless communications |
| WO2014029212A1 (en) * | 2012-08-20 | 2014-02-27 | 华为技术有限公司 | Antenna system |
| CN103633441A (en) * | 2012-08-20 | 2014-03-12 | 华为技术有限公司 | Antenna system |
| CN103633441B (en) * | 2012-08-20 | 2017-08-18 | 华为技术有限公司 | Antenna system |
| CN103313434A (en) * | 2013-06-18 | 2013-09-18 | 福建星网锐捷网络有限公司 | Wireless access method, wireless access device, wireless access system, wireless access point device and antenna |
| CN108111235A (en) * | 2014-09-28 | 2018-06-01 | 福建三元达网络技术有限公司 | A kind of method of work of multi-functional LTE wireless network cards |
| CN108111235B (en) * | 2014-09-28 | 2021-04-09 | 福建三元达网络技术有限公司 | Working method of multifunctional LTE wireless network card |
| CN112601336A (en) * | 2020-12-31 | 2021-04-02 | 珠海雷特科技股份有限公司 | Long-distance data transmission method based on data bus and intelligent lamp control method |
| CN112751739A (en) * | 2020-12-31 | 2021-05-04 | 珠海雷特科技股份有限公司 | Long-distance data transmission device based on data bus and intelligent lamp control system |
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