CN108123747B - W L AN base station signal coverage method based on sector switching - Google Patents

Abstract

The invention provides a W L AN base station radio frequency realization method based on multiple sectors, wherein a W L AN base station adopts a multiple sector switching mechanism, each sector corresponds to a group of 3 × 3 MIMO, a sector network card chip is mainly used as a receiver and corresponds to a sector and is responsible for receiving corresponding sector data, a main network card is used as a transmitting chip and transmits management frames and data frames to the sector, and simultaneously any link data can be received, the multiple sectors are covered, the multi-channel receiving and transmitting are carried out, the time division multiplexing is more sufficient, the number of concurrent users is greatly increased, because the sector network card is mainly used as the receiver, the receiving of each sector is not interfered with each other, the anti-interference capability of the base station is improved, when different sector users collide, only one sector is transmitted, the collision of the base station users is relieved, and the multiple sector multiple transceiver mechanism can effectively select AN optimal path, increase the signal processing capability and increase the.

Description

W L AN base station signal coverage method based on sector switching

The scheme is a divisional application of a parent application, wherein the patent application is named as 'a multi-sector based W L AN base station radio frequency implementation method', the application date of which is 2014.09.16, the application number of which is 201410471006.7.

Technical Field

The invention relates to the technical field of communication equipment, in particular to a W L AN base station radio frequency implementation method based on multiple sectors.

Background

The W L AN base station utilizes electromagnetic waves to send and receive data in the air, effectively solves the problem of network channel connection which is difficult to realize in a wired mode, and because the W L AN has the advantages of high mobility, low price, easiness in expansion, high transmission rate and the like, the W L AN technology is widely applied to the field of wireless extension at present.

However, the rural areas are wide, the terrain environment is complex and diverse, the residence is dispersed and other factors, which require that the W L AN main networking equipment, namely the wireless Access Point (AP), meets the requirements of multiple users in a dense area and large interference, and simultaneously meets the requirement of a large coverage area.

The traditional AP mainly achieves the purposes of interference resistance and coverage increase by increasing the power of the device and increasing the gain of the antenna. Because the traditional AP generally uses a 2.4G frequency band as a coverage, and the transceiver module used as the coverage generally consists of a single wireless communication module and a single radio frequency unit, when the AP is interfered in a certain direction, the performance of the whole device may be affected, and the anti-interference capability is weak; due to the characteristics of the network card chip, the capacity of the traditional AP is limited, and for a user-dense area, in order to meet the coverage requirement, more equipment is needed, which causes the deterioration of networking environment and increases networking difficulty; the traditional AP improves the anti-interference capability by increasing the power of equipment, which is difficult to realize in actual networking, the high power can cause the deterioration of the whole networking environment, and meanwhile, because the transmitter power of the terminal equipment is weaker, the problem of unequal power of a transmitting link and a receiving link can be caused by increasing the transmitting power of the AP, and the coverage range can not be effectively increased.

The prior art discloses an antenna switching method, an antenna switching device and a wireless access point, and the publication number is as follows: 102882567A, published as: 2013-01-16, the antenna switching method comprises: monitoring a message sending signal and a channel idle signal of the AP; if the AP is determined to be receiving the message, obtaining a first sampling value of the receiving power of the omnidirectional antenna; if the first sampling value is higher than the second sampling value of the saved receiving power of the omnidirectional antenna by a preset threshold value, switching the antennas in at least one high-gain antenna of the AP, sampling the receiving power of the currently switched high-gain antenna every time the switching is carried out, and obtaining and saving the sampling power of the currently switched high-gain antenna; and after the at least one high-gain antenna is completely switched, selecting the high-gain antenna with the highest sampling power as a receiving antenna. The method can improve the accuracy of antenna switching judgment, enhance the uplink power from the station to the AP, and further meet the requirement of large-scale coverage.

The prior art also discloses an intelligent control method of a WiFi antenna array, which is disclosed as follows: 102665228A, published as: 2012-09-12, in the WiFi AP, it is detected whether broadcast information is being sent, and if so, the switch array is controlled to make the switching mode of the switch array form the switch setting state of the omnidirectional beam according to the antenna; otherwise, the switch array is controlled to enable the antenna to form a directional beam, and the switch setting state in the switch array corresponding to the directional beam with the best signal quality is locked. The intelligent control method of the WiFi antenna array enhances the anti-interference capability of electromagnetic waves, increases the coverage area of a single WiFi product and improves the transmission quality of the radio waves.

Above two patents all utilize antenna switching method to improve the interference killing feature of WIFI product, and this application file improves the interference killing feature of WIFI product through utilizing switch array control multisector communication module's receiving and dispatching. Both of the above two patents have only a single radio frequency module, but the present application document uses a multi-sector switching mechanism, each sector receives independently, and spatial information can be received simultaneously among multiple sectors.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a multi-sector based W L AN base station radio frequency implementation method, which improves the anti-interference capability of the base station, relieves the collision of base station users, and can effectively select AN optimal path, increase the signal processing capability and increase the coverage area by a multi-sector multi-transceiver mechanism.

The invention is realized in such a way that a W L AN base station radio frequency realization method based on multiple sectors provides a CPU data processing module, a CP L D logic control module, a 3-path transmitting and 3-path receiving module, a multi-beam antenna, a combiner array, a switch array and a main network card chip, wherein the 3-path transmitting and 3-path receiving module comprises a plurality of sector modules, and the structures of the sector modules are the same, and the method specifically comprises the following steps:

step 1, after a multi-beam antenna of the W L AN base station receives AN association request signal of a network card of a terminal;

step 2, the sector network card chip of each sector module controls the switch and the antenna switch in the sector module, and sends the data received by different sector modules to the corresponding sector network card chip;

step 2, the sector network card chip of each sector module processes the radio frequency signals received by the 3-path transmitting and 3-path receiving modules;

step 3, the CPU data processing module judges the optimal sector direction of the user according to the switching signal and RSSI strong and weak information sent back after the processing of each sector network card chip;

step 4, adjusting switches and antenna switches in the sector modules by the sector network card chips according to information returned by the CPU data processing module;

and step 5, the CP L D logic control module controls the radio frequency links of the 3-path transmitting module and the 3-path receiving module according to the information returned by the CPU data processing module, and the main network card chip selects the optimal sector direction and sends the data to the multi-beam antenna.

Furthermore, the method comprises a power module which supplies power to the CPU data processing module, the CP L D logic control module and the 3-way transmitting and 3-way receiving module.

The sector modules are identical in structure and comprise sector network card chips, switches, attenuator chips ATT, combiners, low-noise amplifiers, power amplifiers and antenna switches, the attenuator chips ATT, the power amplifiers, the antenna switches and the multi-beam antennas are sequentially connected, the combiners, the low-noise amplifiers and the antenna switches are sequentially connected, the switches and the combiners are both connected with the sector network card chips, the sector network card chips of the sector modules are all connected with the CPU data processing module, the sector network card chips of the sector modules are all connected with the CP L D logic control module, the CPU data processing module is connected with the CP L D logic control module, the switches of the sector modules are connected with the main network card chip through the combiner array, and the combiners of the sector modules are connected with the main network card chip through the switch array.

Further, after the optimal sector direction is obtained in the step 3, the optimal sector direction is recorded into an association list; when the base station receives or transmits next time, the main network card chip firstly finds out the optimal sector transmitting or receiving direction from the association list; cannot be found and then re-judgment is carried out.

Further, in step 5, the main network card chip selects the optimal sector direction, specifically, when the W L AN base station transmits, the main network card chip sends management frames to all sector modules and sends data frames to the designated sector modules, when the W L AN base station receives, each sector network card chip can simultaneously receive corresponding sector signals through the switch array, the main network card chip receives any radio frequency link signal, and selects the optimal data transmission path, namely the sector direction, according to the switch signals of each sector network card chip and the strength information of each sector RSSI.

Further, the sector network card chip of each sector module controls the switch and the antenna switch in the sector module, specifically, when the W L AN base station receives, the antenna switch is switched to the receiving link, the signal obtained by the multi-beam antenna is amplified by the low noise amplifier, and is sent to the sector network card chip through the combiner, so that the sector network card chip can receive the signal of each sector.

And further, the network card chip of each sector adjusts the switch and the antenna switch in each sector module according to the information returned by the CPU data processing module, specifically, when the W L AN base station transmits, the switch and the antenna switch are switched to a transmitting state, the signal is adjusted by the attenuator chip ATT after passing through the switch, and is transmitted to the multi-beam antenna through the antenna switch after being amplified by the power amplifier, and the attenuator chip ATT realizes gain adjustment of each sector module through the control of the CP L D logic control module, so that the transmitting power of the W L AN base station is automatically adjusted.

The invention has the following advantages: the invention covers through many sectors, receive and dispatch in the multipath, the time sharing is multiplexed more fully, increase the concurrent user quantity greatly; because the sector network card is mainly used as a receiver, the receiving of each sector is not interfered with each other, and the anti-interference capability of the base station is improved; when users in different sectors collide, only one sector is sent, so that the collision of users in a base station is relieved; the multi-sector multi-transceiver mechanism can effectively select the optimal path, increase the signal processing capacity and increase the coverage. The transmitting power of the multiple sectors is independently controlled, the transmitting power of each sector can be independently controlled according to the requirements of the actual networking environment, the signal coverage requirements are better met, and the influence on the networking environment is reduced.

Drawings

FIG. 1 is a schematic block diagram of the method of the present invention.

Fig. 2 is a schematic structural diagram of a 4-sector module connection according to an embodiment of the present invention.

Detailed Description

Referring to fig. 1 and 2, a method for implementing a multi-sector based radio frequency of a W L AN base station according to the present invention provides a CPU data processing module, a CP L D logic control module, a 3-way transmitting and 3-way receiving module, a multi-beam antenna, a combiner array, a switch array, and a main network card chip, where the 3-way transmitting and 3-way receiving module includes a plurality of sector modules, and each sector module has the same structure, and the method specifically includes the following steps:

step 1, after a multi-beam antenna of the W L AN base station receives AN association request signal of a network card of a terminal;

step 2, the sector network card chip of each sector module controls the switch and the antenna switch in the sector module, and sends the data received by different sector modules to the corresponding sector network card chip;

step 2, the sector network card chip of each sector module processes the radio frequency signals received by the 3-path transmitting and 3-path receiving modules;

step 3, the CPU data processing module judges the optimal sector direction of the user according to the switching signal and RSSI strong and weak information sent back after the processing of each sector network card chip; after the optimal sector direction is obtained through judgment in the step 3, recording the optimal sector direction into an association list; when the base station receives or transmits next time, the main network card chip firstly finds out the optimal sector transmitting or receiving direction from the association list; cannot be found and then re-judgment is carried out.

Step 4, adjusting switches and antenna switches in the sector modules by the sector network card chips according to information returned by the CPU data processing module;

and step 5, the CP L D logic control module controls the radio frequency links of the 3-path transmitting module and the 3-path receiving module according to the information returned by the CPU data processing module, and the main network card chip selects the optimal sector direction and sends the data to the multi-beam antenna.

The method comprises a power module which provides power for a CPU data processing module, a CP L D logic control module and a 3-path transmitting and 3-path receiving module.

As shown in fig. 2, in an embodiment of the present invention, the sector modules are 4 modules (not limited to 4 modules in practical application), each of the sector modules has the same structure, each of the sector modules includes a sector network card chip, a switch, an attenuator chip ATT, a combiner, a low noise amplifier, a power amplifier, and an antenna switch, the attenuator chip ATT, the power amplifier, the antenna switch, and a multi-beam antenna are sequentially connected, the combiner, the low noise amplifier, and the antenna switch are sequentially connected, the switch and the combiner are all connected to the sector network card chip, the sector network card chip of each sector module is connected to the CPU data processing module, the sector network card chip of each sector module is connected to the CP L D logic control module, the CPU data processing module is connected to the CP L D logic control module, the switch of each sector module is connected to the main network card chip through a combiner array, and the combiner of each sector module is connected to the main network card chip through the switch array.

In addition, the main network card chip selects the optimal sector direction in step 5, specifically, when the W L AN base station transmits, the main network card chip sends management frames to all sector modules and sends data frames to the designated sector modules, when the W L AN base station receives, each sector network card chip can simultaneously receive corresponding sector signals through the switch array, the main network card chip receives any radio frequency link Signal, and selects the optimal data transmission path, namely the sector direction, according to the switch Signal of each sector network card chip and the strength information of each sector RSSI (Received Signal strength indication).

The sector network card chip of each sector module controls the switch and the antenna switch in the sector module, and particularly, when a W L AN base station receives, the antenna switch is switched to a receiving link, a signal obtained by a multi-beam antenna is amplified by a low noise amplifier and is sent to the sector network card chip through a combiner, so that the sector network card chip can receive the signal of each sector, in order to reduce the influence of a main network card chip transmitter on a sector network card chip receiver, another switch can be added behind the position of the combiner to increase the isolation of the link, meanwhile, a switch array can increase the isolation of a main network card chip receiving link, and reduce the interference of a radio frequency signal transmitted by the sector network card chip on the main network card chip receiver.

The network card chip of each sector adjusts the switch and the antenna switch in each sector module according to the information returned by the CPU data processing module, and specifically, when the W L AN base station transmits, the switch and the antenna switch are switched to a transmitting state, the signal passes through the switch, is adjusted by the attenuator chip ATT, is amplified by the power amplifier, and is sent to the multi-beam antenna through the antenna switch, and the attenuator chip ATT realizes the gain adjustment of each sector module through the control of the CP L D logic control module, so that the transmitting power of the W L AN base station is automatically adjusted, the network card chip is suitable for different application scenes, the interference to the networking environment is reduced, the problem caused by unequal receiving and transmitting link powers is reduced, and the coverage range is improved.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims (6)

1. A W L AN base station signal coverage method based on sector switching is characterized in that the method provides a CPU data processing module, a CP L D logic control module, a 3-path transmitting and 3-path receiving module, a multi-beam antenna and a main network card chip, wherein the 3-path transmitting and 3-path receiving module comprises a plurality of sector modules, the structures of the sector modules are the same, and the method specifically comprises the following steps:

step 1, after a multi-beam antenna of the W L AN base station receives AN association request signal of a network card of a terminal;

step 2, the sector network card chip of each sector module controls the switch and the antenna switch in the sector module, and sends the data received by different sector modules to the corresponding sector network card chip;

step 3, the CPU data processing module judges the optimal sector direction of the user according to the switching signal and RSSI strong and weak information sent back after the processing of each sector network card chip; after the optimal sector direction is obtained through judgment, recording the optimal sector direction into an association list; when the base station receives or transmits next time, the main network card chip firstly finds out the optimal sector transmitting or receiving direction from the association list; the user can not find the target and then carries out re-judgment;

step 4, adjusting switches and antenna switches in the sector modules by the sector network card chips according to information returned by the CPU data processing module;

and step 5, the CP L D logic control module controls the radio frequency links of the 3-path transmitting module and the 3-path receiving module according to the information returned by the CPU data processing module, and the main network card chip selects the optimal sector direction and sends the data to the multi-beam antenna.

2. The method of claim 1, wherein a power module is provided for the CPU data processing module, the CP L D logic control module, the 3-way transmitting module and the 3-way receiving module.

3. The method for covering the W L AN base station signal based on sector switching according to claim 1, wherein the number of the sector modules is 4, the structures of the sector modules are the same, each sector module comprises a sector network card chip, a switch, AN attenuator chip ATT, a combiner, a low noise amplifier, a power amplifier and AN antenna switch, the switches, the attenuator chip ATT, the power amplifier, the antenna switch and a multi-beam antenna are sequentially connected, the combiner, the low noise amplifier and the antenna switch are sequentially connected, the switches and the combiners are both connected with the sector network card chip, the sector network card chip of each sector module is connected with the CPU data processing module, the sector network card chip of each sector module is connected with the CP L D logic control module, the CPU data processing module is connected with the CP L D logic control module, the switches of each sector module are connected with a main network card chip through a combiner array, and the combiners of each sector module are connected with the main network card chip through a switch array.

4. The method of claim 1, wherein the method for coverage of W L AN base station signals based on sector switching comprises:

the main network card chip selects the optimal sector direction in step 5, specifically, when a W L AN base station transmits, the main network card chip sends management frames to all sector modules and sends data frames to the designated sector modules, when the W L AN base station receives, each sector network card chip can simultaneously receive corresponding sector signals through a switch array, the main network card chip receives any radio frequency link signal, and selects the optimal data transmission path, namely the sector direction, according to the switch signals of each sector network card chip and the RSSI strong and weak information of each sector.

5. The method for covering W L AN base station signals based on sector switching according to claim 3, wherein the sector network card chip of each sector module controls the switch and antenna switch in the sector module, specifically, when the W L AN base station receives, the antenna switch is switched to the receiving link, the signals obtained by the multi-beam antenna are amplified by the low noise amplifier, and then sent to the sector network card chip through the combiner, so that the sector network card chip can receive the signals of each sector.

6. The method for covering W L AN base station signals based on sector switching according to claim 3, wherein each sector network card chip adjusts the switch and antenna switch in each sector module according to the information returned by the CPU data processing module, specifically, when the W L AN base station transmits, the switch and antenna switch are switched to a transmitting state, the signals are adjusted by the attenuator chip ATT after passing through the switch, and then are amplified by the power amplifier and sent to the multi-beam antenna through the antenna switch, and the attenuator chip ATT realizes the gain adjustment of each sector module through the control of the CP L D logic control module, so that the transmitting power of the W L AN base station is automatically adjusted.

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