CN110267236B

CN110267236B - Wireless network power control method and system based on Internet of things

Info

Publication number: CN110267236B
Application number: CN201910548510.5A
Authority: CN
Inventors: 邵起明; 郑明吉; 赵来源; 王庆磊; 王乃千; 阴子阳
Original assignee: New Singularity International Technical Development Co ltd
Current assignee: New Singularity International Technical Development Co ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2023-02-28
Anticipated expiration: 2039-06-24
Also published as: CN110267236A

Abstract

The embodiment of the application provides a wireless network power control method and system based on the Internet of things. The STA receives power control information broadcasted by the AP in an IoT channel, wherein the power control information is broadcasted and sent by the AP in the IoT channel according to the configuration of the network management module; and the STA adjusts the transmitting power of the wireless signal according to the power control information and a preset power control decision. When the STA moves among different power level areas, the STA receives power control information broadcast by the APs located in the different power level areas on an IoT channel, therefore, the STA can judge whether the STA is located at the center position or the edge position of the power level area according to the received power control information, and before the STA is accessed to the AP of a certain power level area, the emission power of a wireless signal is adjusted, electromagnetic interference on equipment in the power level area is avoided, the electromagnetic compatibility requirement of the equipment is met, and the running stability of the equipment is ensured.

Description

Wireless network power control method and system based on Internet of things

Technical Field

The application relates to the technical field of industrial internet, in particular to a wireless network power control method and system based on the internet of things.

Background

The industrial internet connects people, data, machines and the like through a network, so that mutual control and data sharing between people and machines and between machines are realized. In an industrial internet built by wireless networks such as Wi-Fi and the like, in order to adapt to the characteristics of industrial control, the wireless network is generally required to have the characteristics of all weather, high bandwidth, wide coverage and low delay.

The industrial internet can be deployed in areas such as power stations and factories, the areas are large, a large number of wireless Access Points (APs) are needed to meet the requirement of wide coverage, and when a terminal STA (such as a mobile phone, a PC, a tablet computer and other electronic devices capable of accessing the AP) moves in coverage areas of different APs, the terminal needs to access different APs through roaming, so that switching of the access APs is realized. In an actual application scenario, a deployment area of the industrial internet may contain a large number of precision industrial devices, some of the devices are very sensitive to interference of electromagnetic waves, and when a strong electromagnetic wave signal exists in the area of the device, the stability of the operation of the device may be affected. In the prior art, although the wireless transmission power of an AP may be limited to reduce the influence on a device, an STA cannot acquire a relevant configuration for limiting the wireless transmission power from the AP before accessing to a certain AP, so that the wireless transmission power of the STA may exceed the electromagnetic bearing capacity of the device, which may affect the operation of the device.

It can be seen that, in an industrial internet scene, the wireless network power control means in the prior art cannot meet the electromagnetic compatibility requirement of industrial equipment, and the running stability of the equipment is affected.

Disclosure of Invention

The embodiment of the application provides a wireless network power control method and system based on the Internet of things, and aims to solve the problem that the wireless network power control means in the prior art cannot meet the electromagnetic compatibility requirement of industrial equipment.

In a first aspect, an embodiment of the present application provides a wireless network power control method based on the internet of things. The method is applied to a terminal STA, the STA comprises a wireless hotspot Wi-Fi module and an Internet of things (IoT) module, the STA communicates with a wireless Access Point (AP) on a Wi-Fi channel through the Wi-Fi module, and the STA communicates with the AP on an IoT channel through the IoT module; the AP has a plurality of APs distributed in different power level areas, each power level area is covered by at least one AP signal, the method comprises: the STA receives power control information broadcasted by the AP on an IoT channel, the power control information is broadcasted and sent by the AP on the IoT channel according to the configuration of a network management module, and the network management module configures different power control information for different power class areas respectively; and the STA adjusts the transmitting power of the wireless signal according to the power control information and a preset power control decision.

In a second aspect, an embodiment of the present application provides a wireless network power control system based on the internet of things. The system comprises: the system comprises a network management module, a wireless Access Point (AP) and a terminal STA; the AP and the STA both comprise a wireless local area network Wi-Fi module and an Internet of things (IoT) module, the Wi-Fi module is used for the AP and the STA to communicate on a Wi-Fi channel, and the IoT module is used for the AP and the STA to communicate on an IoT channel; the AP is provided with a plurality of APs which are distributed in different power level areas, and each power level area is covered by at least one AP; the network management module is used for respectively configuring different power control information for different power grade areas; the AP is used for broadcasting the power control information on the IoT channel according to the configuration of the network management module; the STA to receive the power control information at the IoT channel; and the STA is also used for adjusting the transmitting power of the wireless signal according to the power control information and a preset power control decision.

According to the technical scheme, the embodiment of the application provides a wireless network power control method and system based on the Internet of things. The STA receives power control information broadcasted by the AP in an IoT channel, the power control information is broadcasted and sent by the AP in the IoT channel according to the configuration of the network management module, and the network management module configures different power control information for areas with different power levels respectively; and the STA adjusts the transmitting power of the wireless signal according to the power control information and a preset power control decision. According to the technical scheme provided by the embodiment of the application, when the STA moves among different power class areas, the STA can receive power control information broadcasted by the APs located in the different power class areas on an IoT channel, therefore, the STA can judge whether the STA is located at the center position or the edge position of the power class area according to the received power control information, and before the STA is accessed to the AP of a certain power class area, the wireless signal transmitting power is adjusted in advance, so that the electromagnetic interference on equipment in the power class area is avoided, the electromagnetic compatibility requirement of the equipment is met, and the running stability of the equipment is ensured.

Drawings

In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a wireless terminal STA according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a wireless access point AP according to an embodiment of the present disclosure;

fig. 3 is a flowchart of a wireless network power control method based on the internet of things according to an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating an embodiment of adjusting the transmission power of a wireless signal;

fig. 5 is a schematic diagram illustrating an embodiment of adjusting the transmission power of a wireless signal;

FIG. 6 is a flow chart illustrating an embodiment of adjusting the transmit power of a wireless signal;

FIG. 7 is a schematic diagram illustrating an embodiment of adjusting the transmit power of a wireless signal;

fig. 8 is a flowchart illustrating an embodiment of adjusting the transmission power of a wireless signal;

fig. 9 is a schematic structural diagram of a wireless network power control system based on the internet of things according to an embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The industrial internet can be deployed in areas such as power stations and factories, the areas are large, a large number of wireless Access Points (AP) are needed to meet the requirement of wide coverage, and when a terminal STA moves in coverage areas of different APs, the terminal needs to be accessed to the different APs through roaming, so that switching of access APs is realized. In an actual application scenario, a deployment area of an industrial internet of things may contain a large number of precise industrial devices, some devices are very sensitive to interference of electromagnetic waves, and when a strong electromagnetic wave signal exists in an area where the regional devices are located, the stability of the operation of the devices is affected. In the prior art, although the wireless transmission power of the AP may be limited to reduce the influence on the device, the STA can acquire the relevant configuration for limiting the wireless transmission power from the AP only after entering the electromagnetic sensitive area and accessing the AP in the area, and before that, if the STA operates at a higher wireless transmission power, the generated electromagnetic waves may affect the device in the electromagnetic sensitive area.

In order to solve the above problem, the embodiment of the application provides a wireless network power control method and system based on the internet of things.

The embodiment of the method provides a wireless network power control method based on the Internet of things. The method can be applied to a wireless terminal (Station, STA). The STA may be, for example, a mobile phone, a PC, a tablet computer, an industrial instrument with wireless access capability, or the like.

Fig. 1 is a schematic structural diagram of a wireless terminal STA according to an embodiment of the present disclosure. As shown in fig. 1, the STA includes a wireless local area network Wi-Fi module 101 and an internet of things IoT module 102, and at least one antenna 103 for transceiving wireless signals. The Wi-Fi module 101 is coupled with at least one antenna 103, receives electromagnetic wave signals on a Wi-Fi channel through the antenna 103, and performs filtering, demodulation and other processing on the received signals; in addition, the Wi-Fi module 101 modulates and amplifies a signal to be transmitted, and transmits the signal on a Wi-Fi channel through at least one antenna 103; thereby enabling the STA to communicate with the AP over the Wi-Fi channel. The IoT module 102 is coupled to at least one antenna 103, receives the electromagnetic wave signal on the IoT channel via the antenna 103, and performs filtering, demodulation and other processing on the received signal; in addition, the IoT module 102 modulates and amplifies a signal to be transmitted, and transmits the signal on an IoT channel through at least one antenna 103; thereby enabling the STA to communicate with the AP over the IoT channel. Thus, the STA of embodiments of the present application may communicate with one or more APs at the same time on the Wi-Fi channel and/or the IoT channel.

In one embodiment, when a STA has multiple antennas 103, each antenna 103 may be used to cover a single or multiple communication bands. The different antennas 103 may be respectively coupled with the Wi-Fi module or the IoT module, or may be simultaneously coupled with the Wi-Fi module or the IoT module, and provide signal transceiving capability for the Wi-Fi module and the IoT module in a frequency division multiplexing or time division multiplexing manner.

Fig. 2 is a schematic structural diagram of a wireless access point AP according to an embodiment of the present application. As shown in fig. 2, the access point AP includes a wireless local area network Wi-Fi module 201 and an internet of things IoT module 202, and at least one antenna 203 for transceiving wireless signals. The Wi-Fi module 201 is coupled to the at least one antenna 203, receives electromagnetic wave signals on a Wi-Fi channel via the antenna 203, and transmits electromagnetic wave signals on the Wi-Fi channel through the at least one antenna 203, so that the AP has the capability of communicating with the STA on the Wi-Fi channel. The IoT module 202 is coupled to the at least one antenna 203, receives the electromagnetic wave signal on the IoT channel via the antenna 203, and transmits the electromagnetic wave signal on the IoT channel through the at least one antenna 203, so that the AP has the capability of communicating with the STA on the IoT channel. Thus, the AP of embodiments of the present application may communicate with one or more STAs on the Wi-Fi channel and/or the IoT channel simultaneously.

In an actual application scenario, a deployment area of the industrial internet of things is divided into a plurality of different power level areas, and each power level area makes different limits on the transmitting power of an AP (access point) and an STA (station) so as to protect equipment in the area from electromagnetic interference and damage. Correspondingly, the APs in the embodiment of the present application are distributed in different power class areas, and each power class area is covered by at least one AP, so as to ensure that the STA in the area can perform blind-corner-free communication with the AP.

Fig. 3 is a flowchart of a wireless network power control method based on the internet of things according to an embodiment of the present disclosure.

As shown in fig. 3, the method specifically includes the following steps:

in step 301, the sta receives power control information broadcast by the AP on the IoT channel.

The power control information is broadcasted and sent by the AP on the IoT channel according to the configuration of the network management module, and the network management module configures different power control information for different power class areas respectively.

The network management module in the embodiment of the application can be a computer device with an AP management authority, the network management module establishes connection with all APs in an industrial Internet of things deployment area in a wired or wireless mode, and after power control information of each power level area is generated, corresponding power control information is pushed to each AP according to the power level area where each AP is located.

After receiving the power control information from the network management module, each AP broadcasts the rate control information on the IoT channel, so that as long as an STA enters a signal coverage area of a certain AP, the STA can receive the power control information broadcasted by the AP on the IoT channel.

In the embodiment of the application, the STA and the IoT modules of the APs all operate in a low power consumption mode, so that on an IoT channel, broadcasting of the AP and other data transmission between the STA and the AP are performed at a low wireless transmission power, so as to meet the electromagnetic compatibility requirement of industrial equipment.

In one embodiment, the AP may broadcast the power control information periodically, and the AP may also broadcast a periodic configuration of broadcasting the power control information itself on the IoT channel, so that the STA synchronizes with the AP and periodically turns on the IoT module to receive the power control information, so as to reduce power consumption of the AP and the STA.

In one embodiment, the deployment area of the industrial internet of things can be divided into 3 different power class areas according to different power control requirements: a power unlimited region, a power limited region, and a power control region.

The power unrestricted region does not limit the transmission power of the STA, the STA can transmit wireless signals at full power, and the power unrestricted region may be, for example, an office area, a leisure area, a living area, and the like of a factory where devices having high requirements on electromagnetic compatibility are not deployed. The power-limited zone requires that the STA must turn off the wireless signal transmission function in all frequency bands, and only allows the STA to receive wireless signals. The power control region performs threshold control on the wireless transmission power of the STA, and requires that the wireless transmission power of the STA be maintained below a maximum value.

Step S302, the STA adjusts the transmitting power of the wireless signal according to the power control information and the preset power control decision.

In the embodiment of the present application, the adjusting, by the STA, the wireless signal transmission power includes: the STA adjusts the wireless signal transmission power of the wireless hotspot Wi-Fi channel according to the power control information, and/or the STA adjusts the wireless signal transmission power of the IoT channel according to the power control information.

When the STA moves in a wireless signal coverage area of the industrial Internet, the power control information broadcasted by one or more APs can be received. Since the APs are distributed in different power class areas, the STA may receive one or several kinds of power control information at the same time. The embodiment of the application can specify different power control decisions for different power level areas, so that when the STA enters a certain power level area or leaves the certain power level area, the transmitting power of the wireless signal can be adjusted in time.

In one embodiment, the power control decision may specifically determine whether to adjust the wireless signal transmission power and how to adjust the wireless signal transmission power according to the power class region where the STA is currently located, the current wireless signal transmission power, the type, time and signal strength of the received power control information.

In one embodiment, in view of the higher requirement of the power limiting region on the control level of power, the region switching decision must be completed in a short time when performing the power level region switching, and the switching logic for different power level regions is as follows: switching into a power restricted zone: the method comprises the steps that as long as an STA detects a power limitation area broadcast packet (even a packet) with the signal strength larger than a specified switching threshold (such as-63 dbm) in an IoT channel of the Internet of things, the STA is directly switched to the power limitation area, the wireless signal transmitting power is adjusted according to a power control decision corresponding to the area, and even if a broadcast packet with the signal strength stronger than that of the power limitation area exists in the current position, the STA cannot be switched to other areas.

Switching out of the power-limited zone: the STA cannot currently receive a broadcast packet in a power-limited area with a signal strength greater than a specified switching threshold (e.g., -63 dbm), and in the next N (N is a positive integer greater than or equal to 1, e.g., 3) consecutive broadcast periods, each period receives a broadcast packet in another power class area (and in the same area), e.g., a power-unlimited area, the STA switches to the area, and adjusts the transmission power of the wireless signal according to a power control decision corresponding to the area.

When the STA enters the power control area, the STA needs to transmit a wireless signal according to a power value set in the received power control information, the power control information not only performs power control on the radio frequency of the IoT channel, but also performs power control on the radio frequency of the Wi-Fi channel, and if the individual radio frequency cannot perform power control according to requirements, the radio frequency is directly turned off, that is, the STA does not transmit a wireless signal any more.

According to the technical scheme, the embodiment of the application provides a wireless network power control method based on the Internet of things. The method comprises the following steps: the STA receives power control information broadcasted by the AP on an IoT channel, the power control information is broadcasted and sent by the AP on the IoT channel according to the configuration of a network management module, and the network management module configures different power control information for areas with different power levels respectively; and the STA adjusts the transmitting power of the wireless signal according to the power control information and a preset power control decision. According to the method provided by the embodiment of the application, when the STA moves among different power class areas, the STA can receive the power control information broadcasted by the APs located in the different power class areas on an IoT channel, therefore, the STA can judge whether the STA is located at the center position or the edge position of the power class area according to the received power control information, and adjust the transmitting power of the wireless signal in advance before accessing the AP of a certain power class area, so that the electromagnetic interference on equipment in the power class area is avoided, the electromagnetic compatibility requirement of the equipment is met, and the running stability of the equipment is ensured.

In one embodiment, the network management module configures the power control information of the power unrestricted region to a first value indicating that the STA may adjust the wireless signal transmission power to a maximum power.

For example, if the value range of the power control information is set to 0 to 100, the first value may take the maximum value of 100 of the value range. Therefore, the AP located in the power unrestricted region broadcasts 100 pieces of power control information on the IoT channel, which is used to instruct the STA to transmit a wireless signal with the maximum power when entering the power unrestricted region.

In one embodiment, the network management module configures the power control information of the power restricted zone to a second value, the second value being used to instruct the STA to turn off the wireless signal transmission function.

For example, if the value range of the power control information is set to 0 to 100, the second value may take the minimum value 0 of the value range. Therefore, the power control information broadcast on the IoT channel by the AP located in the power restricted area is 0, which is used to instruct the STA to operate in a "receive-only and no-transmit" mode when entering the power restricted area, i.e., not to allow transmitting wireless signals, but only to allow receiving wireless signals.

In one embodiment, the network management module configures the power control information in the power control region to a third value, the third value being between a first threshold and a second threshold, the first threshold being less than the second threshold; the second value is used to instruct the STA to adjust the wireless signal transmit power to a product of the maximum power and a third numerical percentage.

For example, if the value range of the power control information is set to 0 to 100, the first threshold may be set to 1 (larger than the second value), the second threshold may be set to 99 (smaller than the first threshold), and the value range of the third threshold is 1 to 99.

Illustratively, when the maximum value of the wireless signal transmission power of the STA is 100mW, if the third value is 20, the second value indicates that the wireless signal transmission power of the STA should not exceed 100mW × 20% =20mW.

In some embodiments, the STA may pre-store a list containing power values and power value indices, such as table 1:

table 1 power values and power value indices

Thus, the AP may directly broadcast one index value as power control information on the IoT channel. When the STA receives the index value of 100, it knows that it is power control information from the power unlimited region by looking up a table, and instructs the STA to transmit wireless signals with a maximum power of 500mW in the power unlimited region. When the STA receives the index value 0, it knows that it is power control information from the power limitation area through table lookup, and indicates that the STA cannot transmit wireless signals in the power limitation area and can only receive wireless signals. When the STA receives the index value between 1-99, the STA knows that the index value is power control information from the power control area through table lookup, and instructs the STA to allow the power value corresponding to the index value to be used as the maximum allowed transmission power to transmit wireless signals in the power control area.

Fig. 4 is a schematic diagram illustrating an embodiment of adjusting the transmission power of a wireless signal.

In one embodiment, as shown in fig. 4, when the STA moves within a power class area, if the STA receives only power control information of one power class area, it indicates that the STA is currently located at a position relatively close to the center of a certain power class area, and therefore, it does not involve moving between two different power class areas across zones, and therefore, the STA may directly adjust the transmission power of the wireless signal according to the received power control information, and if the transmission power of the wireless signal has been adjusted, the transmission power is kept unchanged.

Since industrial equipment in the power-limited zone is sensitive to electromagnetic interference, the power-limited zone needs to have a high level requirement for controlling the wireless signal transmission power of the STA, that is: when the STA enters the power limiting region, the adjustment of the wireless signal transmitting power can be completed in a short time, so that the influence on industrial equipment is avoided. In order to meet the above requirements, embodiments of the present application provide a wireless signal transmission power adjustment procedure in which the STA enters the power restricted area from another power class area, and a wireless signal transmission power adjustment procedure in which the STA leaves the power restricted area.

Fig. 5 is a schematic diagram illustrating an embodiment of adjusting the transmission power of a wireless signal.

Fig. 6 is a flowchart illustrating an embodiment of adjusting the transmission power of a wireless signal.

In one embodiment, as shown in fig. 5 and 6, when the STA enters the power limitation zone from the other power class zone, the STA adjusting the wireless signal transmission power includes the following steps:

step S401, when the STA moves in the power class area, if the STA receives the power control information of the power restricted area, the STA determines whether the signal reception strength of the power control information of the power restricted area is greater than a third threshold.

Step S402, when the signal receiving strength of the power control information of the power limiting area is larger than a third threshold, the STA adjusts the transmitting power of the wireless signal according to the power control information of the power limiting area.

When the STA moves close to the power limit area from other power class areas, the STA experiences the following steps: the power control information of the power limitation area can be received, and the signal strength of the received power control information of the power limitation area is gradually increased. In this process, the STA continuously monitors the signal strength of the received power control information of the power restricted zones, and if the monitored signal strength is greater than the third threshold (even if the strength of the broadcast packet of only one power restricted zone is monitored to be greater than the third threshold), the STA immediately adjusts the wireless signal transmission power according to the received power control information of the power restricted zones, for example: and turning off the wireless signal transmitting function of the STA.

Fig. 7 is a schematic diagram illustrating an embodiment of adjusting the transmission power of a wireless signal.

Fig. 8 is a flowchart illustrating an embodiment of adjusting the transmission power of a wireless signal.

In one embodiment, as shown in fig. 7 and 8, when the STA leaves the power limitation zone, the STA adjusting the wireless signal transmission power includes the following steps:

step S501, when the STA moves within the power class area, if the STA does not receive the power control information of the power restricted area at the time T0, or the signal reception strength of the power control information of the power restricted area received by the STA at the time T0 is smaller than the third threshold, the STA determines, from the time T0, whether to receive only the power control information of the power unrestricted area within N consecutive AP broadcast periods, or whether to receive only the power control information of the power controlled area within N consecutive AP broadcast periods.

When the STA leaves the power limitation area and enters other power class areas, the STA experiences the following steps: a process of receiving power control information of a power restriction region whose signal strength is gradually decreased, and a process of not receiving the power control information of the power restriction region. In this process, the STA continuously monitors the signal strength of the received power control information of the power restricted area, and if the STA does not receive the power control information of the power restricted area at a certain time node T0, or the signal strength of the received power control information of the power restricted area is smaller than a third threshold, it indicates that the STA leaves the power restricted area.

Next, in order to determine which power class region the STA enters, the STA starts to determine whether to receive only the power control information of the power unrestricted region in N consecutive AP broadcast periods or whether to receive only the power control information of the power controlled region in N consecutive AP broadcast periods at time T0.

Step S502, when the STA receives only the power control information of the power unrestricted region in N consecutive AP broadcast periods, it indicates that the STA has entered the power unrestricted region from the power restricted region, and therefore, the STA adjusts the wireless signal transmission power according to the power control information of the power unrestricted region, for example: the wireless signal transmission power of the STA is adjusted to the maximum power.

Step S503, when the STA receives only the power control information of the power control area in the consecutive N AP broadcast periods, it indicates that the STA has entered the power control area from the power restricted area, and therefore, the STA adjusts the transmission power of the wireless signal according to the power control information of the power control area, for example: and determining the maximum power of the wireless signal transmitted by the STA according to the value of the power control information, and transmitting the wireless signal at the maximum power.

The embodiment of the application also provides a wireless network power control system based on the Internet of things. Fig. 9 is a schematic structural diagram of the system, which includes:

a network management module 601, a wireless access point AP 602 and a terminal STA 603; the AP 602 and the STA 603 both comprise a wireless local area network Wi-Fi module and an Internet of things (IoT) module, wherein the Wi-Fi module is used for the AP 602 and the STA 603 to communicate on a Wi-Fi channel, and the IoT module is used for the AP 602 and the STA 603 to communicate on an IoT channel; a plurality of APs 602 are distributed in different power level areas, and each power level area is covered by at least one AP 602;

a network management module 601, configured to configure different power control information for different power class areas respectively;

an AP 602 configured to broadcast power control information on an IoT channel according to the configuration of the network management module 601;

STA 603 to receive power control information on an IoT channel;

the STA 603 is further configured to adjust a transmission power of the wireless signal according to the power control information and a preset power control decision.

STA 603 and AP 602 in the embodiment of the present application have structures shown in fig. 1 and fig. 2, respectively, where the network management module 601 may be a computer device having an AP 602 management authority, and the network management module 601 establishes a connection with all APs 602 in an industrial internet of things deployment area in a wired or wireless manner, and after generating power control information of each power class area, pushes corresponding power control information to each AP 602 according to the power class area where each AP 602 is located.

After receiving the power control information from the network management module 601, each AP 602 broadcasts the rate control information on the IoT channel, so that the STA 603 can receive the power control information broadcast by the AP 602 on the IoT channel as long as it enters the signal coverage area of the AP 602.

In the embodiment of the present application, the STA 603 and the IoT modules of each AP 602 operate in a low power consumption mode, so that on the IoT channel, broadcasting of the AP 602 and other data transmission between the STA 603 and the AP 602 are performed at a lower wireless transmission power, so as to meet the electromagnetic compatibility requirement of the industrial device.

As can be seen from the above technical solutions, in the system provided in the embodiment of the present application, the STA receives the power control information broadcasted by the AP in the IoT channel, where the power control information is broadcasted by the AP in the IoT channel according to the configuration of the network management module, and the network management module configures different power control information for different power class areas respectively; and the STA adjusts the transmitting power of the wireless signal according to the power control information and a preset power control decision. According to the system provided by the embodiment of the application, when the STA moves among different power class areas, the STA can receive power control information broadcasted by the APs located in the different power class areas on an IoT channel, therefore, the STA can judge whether the STA is located at the center position or the edge position of the power class area according to the received power control information, and before the STA is accessed to the AP of a certain power class area, the wireless signal transmitting power is adjusted in advance, so that the electromagnetic interference on equipment in the power class area is avoided, the electromagnetic compatibility requirement of the equipment is met, and the running stability of the equipment is ensured.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims

1. The wireless network power control method based on the Internet of things is applied to a terminal STA (station), wherein the STA comprises a wireless hotspot Wi-Fi module and an Internet of things IoT module, the STA communicates with a wireless Access Point (AP) on a Wi-Fi channel through the Wi-Fi module, and the STA communicates with the AP on an IoT channel through the IoT module; the AP is distributed in different power class areas, each power class area is covered by at least one AP, and the AP is configured to broadcast power control information on an IoT channel according to configuration of a network management module and to transmit data with the accessed STA on a Wi-Fi channel, where the network management module configures different power control information for different power class areas, respectively, and the method includes:

the STA receiving power control information broadcast by the AP on an IoT channel;

when the STA enters a power level area corresponding to the received power control information, adjusting the wireless signal transmitting power of the STA in a Wi-Fi channel according to the received power control information and a preset power control decision;

wherein:

the power level area comprises a power unlimited area, a power limited area and a power control area;

the STA can receive power control information broadcasted by the APs located in different power class areas on an IoT channel, the STA judges whether the STA is located in the center position or the edge position of the power class area according to the received power control information, and when the STA moves close to a power limiting area from other power class areas, the STA can experience the following steps: the method comprises the steps that power control information of a power limiting area cannot be received, the power control information of the power limiting area can be received, and the signal strength of the received power control information of the power limiting area is gradually increased.

2. The method of claim 1, wherein the network management module configures the power control information of the power unrestricted region to a first value, and wherein the first value is used to instruct the STA to adjust the wireless signal transmission power to a maximum power.

3. The method of claim 1, wherein the network management module configures the power control information of the power restricted zone to a second value, and wherein the second value is used to instruct the STA to turn off wireless signal transmission functions.

4. The method of claim 1, wherein the network management module configures the power control information in the power control region to a third value, the third value being between a first threshold and a second threshold, the first threshold being less than the second threshold; the second value is used to instruct the STA to adjust the wireless signal transmit power to a product of the maximum power and the third numerical percentage.

5. The method of claim 1, wherein the STA adjusts wireless signal transmit power based on the power control information and a predetermined power control decision, comprising:

when the STA moves in the power level area, if the STA only receives one type of power control information of the power level area, the STA adjusts the transmitting power of wireless signals according to the received power control information.

6. The method of claim 1, wherein the STA adjusting the wireless signal transmission power according to the power control information and a preset power control decision comprises:

when the STA moves in the power class region, when the STA leaves the power limitation region and enters another power class region, the STA may successively experience: a process in which the signal strength of the received power control information of the power restricted area becomes gradually smaller and the power control information of the power restricted area is not received; during this process, the STA continuously monitors the signal strength of the received power control information of the power restricted zone;

if the STA does not receive the power control information of the power restricted area at the time T0, or the signal reception strength of the power control information of the power restricted area received by the STA at the time T0 is smaller than a third threshold, it indicates that the STA leaves the power restricted area;

starting from the time T0, the STA judges whether to receive the power control information of the power non-limiting area only in N continuous AP broadcast periods or not, or whether to receive the power control information of the power control area only in N continuous AP broadcast periods;

further comprising: when the STA only receives the power control information of the power non-limiting area in continuous N AP broadcast periods, the STA adjusts the transmitting power of a wireless signal according to the power control information of the power non-limiting area;

further comprising: and when the STA only receives the power control information of the power control area in N continuous AP broadcast periods, the STA adjusts the transmitting power of the wireless signal according to the power control information of the power control area.

7. The method of any of claims 1-6, further comprising:

and when the STA enters a power level region corresponding to the power control information received by the STA, adjusting the wireless signal transmitting power of the STA on an IoT channel according to the power control information received by the STA and a preset power control decision.

8. A wireless network power control system based on the Internet of things is characterized by comprising:

the system comprises a network management module, a wireless Access Point (AP) and a terminal STA; the AP and the STA both comprise a wireless local area network Wi-Fi module and an Internet of things (IoT) module, the Wi-Fi module is used for the AP and the STA to communicate on a Wi-Fi channel, and the IoT module is used for the AP and the STA to communicate on an IoT channel; the AP is distributed in different power level areas, and each power level area is covered by at least one AP;

the network management module is used for configuring different power control information for different power grade areas respectively;

the AP is used for broadcasting power control information on an IoT channel according to the configuration of the network management module and transmitting data with the accessed STA on a Wi-Fi channel;

the STA to receive the power control information at the IoT channel;

the STA is also used for adjusting the wireless signal transmitting power of the STA in a Wi-Fi channel according to the received power control information and a preset power control decision when entering a power level area corresponding to the power control information received by the STA;