CN114585028A - Network switching method and related equipment - Google Patents

Abstract

The embodiment of the present application provides a network switching method and related equipment, the method includes: the first wireless routing device detects that the signal strength when the electronic device communicates with the first wireless routing device is less than the signal strength threshold, and sends a first wireless routing device to the controller. information; the controller sends the first instruction to the first wireless routing device according to the first information, and the first wireless routing device sends the first data frame to the electronic device according to the first instruction; the controller sends the at least one second wireless router according to the first information The device sends a second instruction, and the second wireless routing device obtains the signal strength of the first reply frame of the electronic device according to the second instruction and sends it to the controller; the controller determines the third wireless route from the second wireless routing device according to the signal strength device, the electronic device switches the communication connection with the first wireless routing device to the communication connection with the third wireless routing device. The method can switch the wireless router of the electronic device and improve the quality of network communication.

Description

Network switching method and related equipment

technical field

The present application relates to the field of communication technologies, and in particular, to a network switching method and related equipment.

Background technique

With the continuous development of wireless communication technology, wireless local area networks (wireless local area networks, WLAN) have been widely used. In shopping malls, office buildings and other areas, multiple WLAN networks are usually deployed. When users move electronic devices in these areas, they will move from the signal range of one WLAN network to the signal range of another WLAN network. The state needs to be switched between different access points (access points, AP).

According to the IEEE 802.11 standard, the 802.11k, 802.11r and 802.11v protocols included in it allow electronic devices to smoothly switch from one access point to another. However, due to the impact of cost or deployment strategy, or early products, there are still some electronic devices that do not support 802.11k, 802.11r and 802.11v protocols. For such electronic devices to roam in the WLAN network, it is urgent to improve the handover. efficiency.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a network switching method and related equipment, which have good compatibility and stability, and improve the communication quality of electronic equipment.

In a first aspect, an embodiment of the present application provides a network switching system, including a controller, a first wireless routing device, at least one second wireless routing device, and an electronic device, the first wireless routing device wirelessly communicates with the electronic device communication connection; the first wireless routing device detects the signal strength when the electronic device communicates with the first wireless routing device, and when the signal strength is less than a preset signal strength threshold, the first wireless routing device sends the first information to the controller; the controller sends a first instruction to the first wireless routing device according to the first information, where the first instruction is used to instruct the first wireless routing device to send the first instruction to the electronic device data frame; the first wireless routing device sends a first data frame to the electronic device according to the first instruction, so that the electronic device can reply to the first reply frame according to the first data frame; the controller The first information sends a second instruction to at least one of the second wireless routing devices, where the second instruction is used to instruct the second wireless routing device to monitor the first reply frame and report the information of the first reply frame. Signal strength; the second wireless routing device monitors the first reply frame replied by the electronic device according to the second instruction, obtains the signal strength of the first reply frame, and converts the signal of the first reply frame The strength is sent to the controller; the controller determines a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, so that the electronic device will communicate with all the wireless routing devices. The communication connection of the first wireless routing device is switched to the communication connection with the third wireless routing device.

The first wireless routing device may be a wireless access point AP1, such as a wireless router, that is, a current access point that establishes a communication connection with the electronic device, and the second wireless routing device may be a neighbor access point of the access point AP1, which may There are multiple, the third wireless device can be a target access point AP2 selected from the neighbor access points, that is, the target access point to which the electronic device will switch the communication connection, and the controller can be a control terminal, the control terminal from An access point selected from multiple access points may also be an access point set separately in addition to these multiple access points, or may be a wireless access point controller (AC) or an integrated access point. Control device in the access point. The first information can be a kind of indication information, the first data frame can be an empty data frame, that is, a data frame with an empty data content part, and the first reply frame that the electronic device replies according to the empty data frame can be an acknowledge character (acknowledge character). , ACK).

In the above network switching system, when the signal strength when the electronic device communicates with the first wireless routing device is less than the signal strength threshold, the controller instructs the first wireless routing device to send the first data frame to the electronic device, so that the electronic device has a data frame to send out , to ensure that the second wireless routing device can monitor the signal strength of the electronic device, and then the controller selects a third wireless routing device from at least one second wireless routing device, so that electronic devices that do not support 802.11k, 802.11r and 802.11v protocols The device switches to establish a communication connection with the third wireless routing device, which has good compatibility and stability, and improves the communication quality of the electronic device.

In a possible implementation manner of the first aspect of the embodiment of the present application, the first wireless routing device detects the signal strength when the electronic device communicates with the first wireless routing device, including: the first wireless routing device is in the first wireless routing device. Collect the signal strength when the electronic device communicates with the first wireless routing device within a sampling period; if the first wireless routing device does not collect the signal strength within the first sampling period, send the signal to the The electronic device sends a second data frame; the first wireless routing device obtains the signal strength of the second reply frame sent by the electronic device according to the second data frame.

Optionally, in addition to sending null data frames to the electronic device without collecting the signal strength of the electronic device, the first wireless routing device can also send null data frames to the electronic device according to a preset frequency to ensure that the electronic device has The data frame is sent out for the first wireless routing device to collect. Combining the first aspect and the above implementation manner, the first sampling period may be 1 second/time. If the signal strength of the electronic device is collected within the first sampling period, it is directly judged whether the signal strength is less than the strength threshold; if no signal strength is detected If the signal strength of the electronic device is determined, it will actively send empty data frames to the electronic device to ensure that the electronic device has data frames sent out for detection by the first wireless routing device within the first sampling period, thereby improving the communication quality of the electronic device; in addition, The first wireless routing device sends a null data frame to the electronic device only when the signal strength of the electronic device is not detected, which can reduce the communication power consumption of the first network device.

In a possible implementation manner of the first aspect of the embodiment of the present application, when the signal strength is less than a preset signal strength threshold, the first wireless routing device sends the first information to the controller, The method includes: determining whether the signal strengths of consecutively received preset first number of second reply frames are all less than a first signal strength threshold, and each second reply frame corresponds to a second data frame sent within the first sampling period; If so, send first information to the controller. In the above implementation manner, the preset first number may be 3, and by judging whether the signal strengths of multiple consecutive second reply frames are all less than the first signal strength threshold, the accuracy of the judgment result can be further improved, so as to further improve the electronic equipment. communication quality.

In a possible implementation manner of the first aspect of the embodiment of the present application, after the first wireless routing device acquires the signal strength of the second reply frame sent by the electronic device according to the second data frame, the method includes: when The signal strength of the second reply frame obtained by the first wireless routing device is less than the first signal strength threshold, and the signal strength of the electronic device is collected in a second sampling period, and the second sampling period is smaller than the first sampling period period; if the signal strength of the electronic device is not detected within the second sampling period, send a third data frame to the electronic device; obtain a third reply sent by the electronic device according to the third data frame The signal strength of the frame. Optionally, after acquiring the signal strength of the third reply frame of the electronic device, the first wireless routing device may determine that among the received third reply frames of the second preset number, the signal strength of the third reply frame in a preset proportion is Whether all of them are less than the second signal strength threshold, each third reply frame corresponds to a third data frame sent in the second sampling period; if so, send the first information to the controller.

In the above embodiment, the second sampling period may be 0.2 seconds/time, the second number may be 20, and the preset ratio may be 70%. If the signal strength of the electronic device is collected within the second sampling period, the Determine whether the signal strength is less than the strength threshold; if the signal strength of the electronic device is not detected, it will actively send an empty data frame to the electronic device to ensure that the electronic device has a data frame to send out in the second sampling period for the first wireless routing device Therefore, the communication quality of the electronic device is improved, and the accuracy of the judgment result can be further improved by shortening the sampling period and judging whether the signal strength of multiple times is less than the second signal strength threshold.

In a possible implementation manner of the first aspect of the embodiment of the present application, the second wireless routing device acquires the signal strength of the first reply frame, and sends the signal strength of the first reply frame to the controller, The method includes: acquiring, by the second wireless routing device, the signal strength of the first reply frame, and sending the signal strength of the first reply frame and the available bandwidth of the second wireless routing device to the controller.

In the above embodiment, after receiving the signal strength of the first reply frame and the available bandwidth of the second wireless routing device, the controller can determine the third wireless routing device from the at least one second wireless routing device with a preset calculation model . In the above implementation manner, the controller determines the third wireless routing device (that is, the target access point) by using the available bandwidth of the second wireless routing device and the signal strength of the first reply frame, and optionally selects a third wireless routing device with a better quality. , after the electronic device is switched to communicate with the third wireless routing device, the communication quality of the electronic device can be improved.

In a possible implementation manner of the first aspect of the embodiment of the present application, before the controller determines the third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, further The method includes: the controller sends a third instruction to the first wireless routing device, where the third instruction is used to instruct the first wireless routing device to stop sending the first data frame to the electronic device. In this implementation manner, the controller instructs the first wireless routing device to stop sending the first data frame in time, which can reduce the communication power consumption between the first wireless routing device and the electronic device.

In a possible implementation manner of the first aspect of the embodiment of the present application, after determining the third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, the controller further includes: The controller sends a fourth instruction to the remaining wireless routing devices in the second wireless routing device except the third wireless routing device, where the fourth instruction is used to instruct the remaining wireless routing devices to The electronic device is added to the communication blacklist. On this basis, the electronic device switches the communication connection with the first wireless routing device to the communication connection with the third wireless routing device, including: the controller sends the fifth wireless routing device to the first wireless routing device. instruction, the fifth instruction is used to instruct the first wireless routing device to disconnect the communication connection with the electronic device; the electronic device sends a network access request to the second wireless routing device; the third wireless routing device The wireless routing device receives the network access request and establishes a communication connection with the electronic device.

Among them, after the other wireless routing devices add the electronic device to the communication blacklist, even if the electronic device subsequently sends an access request to the wireless routing device, the communication connection cannot be established, so as to improve the successful establishment of communication between the electronic device and the third wireless routing device. Possibility to connect.

In a second aspect, an embodiment of the present application provides a network switching method. The method is executed by a first wireless routing device, and includes: detecting a signal strength when an electronic device communicates with the first wireless routing device, and when the signal strength When less than a preset signal strength threshold, send first information to the controller, the electronic device is wirelessly connected to the first wireless routing device, and the first information is used to instruct the controller to send the first information to the first wireless router. The wireless routing device sends a first instruction; receives the first instruction sent by the controller, and sends a first data frame to the electronic device according to the first instruction, where the first data frame is used to instruct the electronic device based on The first data frame replies to the first reply frame; and a fifth instruction sent by the controller is received, where the fifth instruction is used to instruct the first wireless routing device to disconnect the communication connection with the electronic device.

In the above network switching method, when the signal strength when the electronic device communicates with the first wireless routing device is less than the signal strength threshold, the first wireless routing device sends the first data frame to the electronic device according to the instruction of the controller, so that the electronic device has a data frame Send out to ensure that the second wireless routing device can monitor the signal strength of the electronic device, and then the controller selects a third wireless routing device from at least one second wireless routing device, so that the 802.11k, 802.11r and 802.11v protocols are not supported The electronic device is switched to establish a communication connection with the third wireless routing device, which has good compatibility and stability, and improves the communication quality of the electronic device.

In a possible implementation manner of the second aspect of the embodiment of the present application, the detecting the signal strength when the electronic device communicates with the first wireless routing device includes: collecting, within a first sampling period, the relationship between the electronic device and the first wireless routing device. The signal strength when the first wireless routing device communicates; if the signal strength of the electronic device is not collected within the first sampling period, a second data frame is sent to the electronic device; The signal strength of the second reply frame sent by the second data frame. Optionally, when it is determined that the signal strengths of the preset first number of consecutively received second reply frames are all less than the first signal strength threshold, first information is sent to the controller, and each second reply frame corresponds to a The second data frame sent in the first sampling period.

In the above embodiment, the first wireless routing device actively sends the first data frame to the electronic device to ensure that the electronic device sends a data frame within the first sampling period for the first wireless routing device to detect, thereby improving the reliability of the electronic device. communication quality.

In a possible implementation manner of the second aspect of the embodiment of the present application, after acquiring the signal strength of the second reply frame sent by the electronic device according to the second data frame, the method further includes: when the first reply frame is acquired The signal strength of the second reply frame is less than the first signal strength threshold, the signal strength of the electronic device is collected in the second sampling period, and the second sampling period is smaller than the first sampling period; if the second sampling period is If the signal strength of the electronic device is not collected, a third data frame is sent to the electronic device; and the signal strength of the third reply frame sent by the electronic device according to the third data frame is acquired. Optionally, after acquiring the signal strength of the third reply frame of the electronic device, the first wireless routing device may determine that among the received third reply frames of the second preset number, the signal strength of the third reply frame in a preset proportion is Whether all of them are less than the second signal strength threshold, each third reply frame corresponds to a third data frame sent in the second sampling period; if so, send the first information to the controller. Therefore, by shortening the sampling period and judging whether the signal strengths of multiple times are all smaller than the second signal strength threshold, the accuracy of the judgment result can be further improved.

In a possible implementation manner of the second aspect of the embodiment of the present application, the method further includes: receiving a third instruction sent by the controller, and stopping sending the first data to the electronic device according to the third instruction frame.

In the above embodiment, after the controller sends the first instruction for a preset period of time (for example, 4 seconds), or after receiving the signal strength settlement results sent by all the second wireless routing devices, the controller can send a stop message to the first wireless routing device. The instruction to construct the first data frame is to reduce the communication power consumption of the first wireless routing device.

In a possible implementation manner of the second aspect of the embodiment of the present application, the first data frame includes a source address, a target address, and data content, and the data content is a null value. The use of null data frames reduces the impact on the performance of the network, electronic equipment and wireless routing equipment, and can also reduce the impact on the network and avoid burdening the network environment.

In a third aspect, an embodiment of the present application provides a network switching method. The method is executed by a controller, and includes: receiving first information sent by a first wireless routing device; sending to the first wireless routing device according to the first information a first instruction, and sending a second instruction to at least one of the second wireless routing devices, where the first instruction is used to instruct the first wireless routing device to send a first data frame to the electronic device, the second The instruction is used to instruct the second wireless routing device to monitor the first reply frame sent by the electronic device and report the signal strength of the first reply frame, and the first reply frame is for the electronic device based on the first reply frame. data frame to reply; according to the signal strength of the first reply frame, determine a third wireless routing device from the at least one second wireless routing device, so that the electronic device will communicate with the first wireless routing device The communication connection is switched to the communication connection with the third wireless routing device.

In the above network switching method, when the signal strength when the electronic device communicates with the first wireless routing device is less than the signal strength threshold, the controller instructs the first wireless routing device to send the first data frame to the electronic device, so that the electronic device has a data frame to send out , to ensure that the second wireless routing device can monitor the signal strength of the electronic device, and then the controller selects a third wireless routing device from at least one second wireless routing device, so that electronic devices that do not support 802.11k, 802.11r and 802.11v protocols The device switches to establish a communication connection with the third wireless routing device, which has good compatibility and stability, and improves the communication quality of the electronic device.

In a possible implementation manner of the third aspect of the embodiment of the present application, determining a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame includes: obtaining the first wireless routing device. The signal strength of a reply frame and the available bandwidth of the second wireless routing device; according to the signal strength of the first reply frame, the available bandwidth of the second wireless routing device, and a preset calculation model, from at least one A third wireless routing device is determined in the second wireless routing device.

In the above embodiment, the controller determines the third wireless routing device (that is, the target access point) by using the available bandwidth of the second wireless routing device and the signal strength of the first reply frame, and selects a better third wireless routing device. , after the electronic device is switched to communicate with the third wireless routing device, the communication quality of the electronic device can be improved.

In a possible implementation manner of the third aspect of the embodiment of the present application, before determining a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, The method further includes: sending a third instruction to the first wireless routing device, where the third instruction is used to instruct the first wireless routing device to stop sending the first data frame to the electronic device.

In the above embodiment, the controller may send an instruction to stop constructing the first data frame to the first wireless routing device, so as to reduce the communication power consumption of the first wireless routing device.

In a possible implementation manner of the third aspect of the embodiment of the present application, after the third wireless routing device is determined from the at least one second wireless routing device according to the signal strength of the first reply frame, The method further includes: sending a fourth instruction to the remaining wireless routing devices in the second wireless routing device except the third wireless routing device, where the fourth instruction is used to instruct the remaining wireless routing devices to The electronic device is added to the communication blacklist.

In the above embodiment, by setting the communication blacklist for the remaining wireless routing devices, the electronic devices cannot establish communication connections with the remaining wireless routing devices, so that the electronic devices can be accurately connected to the third wireless routing device, which further improves the reliability of the electronic devices. communication quality.

In a possible implementation manner of the third aspect of the embodiment of the present application, the electronic device is caused to switch the communication connection with the first wireless routing device to the communication connection with the third wireless routing device, The method includes: sending a fifth instruction to the first wireless routing device, where the fifth instruction is used to instruct the first wireless routing device to disconnect the communication connection with the electronic device.

In the above embodiment, during the process of switching the network connection of the electronic device, the controller actively instructs the first wireless routing device to disconnect the communication connection with the electronic device, so as to facilitate the subsequent process of establishing a communication connection between the electronic device and the third wireless routing device, and further The communication quality of electronic equipment is improved.

In a possible implementation manner of the third aspect of the embodiment of the present application, the method further includes: receiving second information sent by the third wireless routing device, where the second information represents the third wireless routing device Communication connection information with the electronic device.

In the above embodiment, the third wireless routing device sends the communication connection information with the electronic device to the controller, so that when the electronic device continues to leave the signal range of the third wireless routing device, the above process is repeated to further improve the performance of the electronic device. communication quality.

In a possible implementation manner of the third aspect of the embodiment of the present application, the first data frame includes a source address, a target address, and data content, and the data content is a null value. The use of null data frames reduces the impact on the performance of the network, electronic equipment and wireless routing equipment, and can also reduce the impact on the network and avoid burdening the network environment.

In a fourth aspect, an embodiment of the present application provides an apparatus, the apparatus is included in a wireless routing device, and the apparatus has the function of implementing the behavior of the wireless routing device in the above-mentioned first aspect and possible implementations of the above-mentioned first aspect, or is included in the wireless routing device. In the controller, the functions of the controller behavior in the second aspect and possible implementation manners of the above-mentioned second aspect are implemented. The functions can be implemented by hardware, or by executing corresponding software by hardware. The hardware or software includes one or more modules or units corresponding to the above functions. For example, a receiving module or unit, a processing module or unit, and the like.

In a fifth aspect, an embodiment of the present application provides a wireless routing device, including a processor and a memory; the processor and the memory are coupled, and the memory stores program instructions, when the program instructions stored in the memory are processed by the processor During execution, any one of the methods in the technical solutions described in the first aspect is executed.

In a sixth aspect, an embodiment of the present application provides a controller, including a processor and a memory; the processor and the memory are coupled, and the memory stores program instructions, and when the program instructions stored in the memory are executed by the processor When executing any one of the technical solutions described in the second aspect.

In a seventh aspect, an embodiment of the present application provides a chip, including a processor. The processor is used to read and execute the computer program stored in the memory to perform the method in the first aspect and any possible implementations thereof, or the second aspect and any possible implementations thereof.

Optionally, the chip further includes a memory, and the memory is connected to the processor through a circuit or a wire.

Further optionally, the chip further includes a communication interface.

In an eighth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and the computer program includes program instructions that, when executed by a processor, cause all The processor executes the technical solution described in the first aspect, or any one of the technical solutions described in the second aspect.

In a ninth aspect, an embodiment of the present application provides a computer program product, the computer program product comprising: computer program code, the computer program code, when executed by a processor, causes the processor to execute the execution of the first aspect The technical solution, or any one of the technical solutions described in the second aspect.

Description of drawings

FIG. 1 is an application scenario diagram of an example of a network switching method provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an example of a network device provided by an embodiment of the present application;

3 is a schematic flowchart of an example of a network switching method provided by an embodiment of the present application;

4 is a schematic flowchart of another example of a network switching method provided by an embodiment of the present application;

FIG. 5 is a schematic flowchart of another example of a network switching method provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the embodiments of the present application, unless otherwise stated, “/” means or means, for example, A/B can mean A or B; “and/or” in this document is only a description of the associated object The association relationship of , indicates that there can be three kinds of relationships, for example, A and/or B, can indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" refers to two or more than two.

Hereinafter, the terms "first", "second" and "third" are only used for descriptive purposes, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first", "second", "third" may expressly or implicitly include one or more of that feature.

In the IEEE 802.11 standard, the 802.11k protocol defines a radio resource management (RRM) mechanism, which enables electronic devices that support 802.11k to better understand the radio frequency environment where the wireless client is located, so that the electronic devices can better roam. Handover; for electronic devices that do not support the 802.11k protocol, the measurement of the surrounding wireless environment cannot be performed through standard protocols, which has an important impact on the selection of the target access point during the movement process, resulting in the electronic device scanning at multiple radio frequencies. Therefore, more switching time is consumed. The 802.11r protocol focuses on reducing the time required for authentication while roaming and helps support real-time responses such as voice. The protocol allows electronic devices to establish a secure and quality-of-service relationship with a new access point before handoff. of service, QoS), which can minimize connection loss and call interruption, and improve the switching process of electronic devices when moving between access points; for electronic devices that do not support the 802.11r protocol, they cannot pass the standard The protocol interacts with the access point, making it impossible to quickly switch to the new access point. The 802.11v protocol provides an important and efficient mechanism to simplify network deployment and management. The protocol will specify the wireless infrastructure to control key parameters on wireless terminal adapters, such as determining which access point to connect to, etc.; most support for 802.11v can be found in It can be implemented in software, products, and upgrading existing electronic equipment. Electronic equipment control, network selection, network optimization, and statistical data acquisition and detection can all be implemented through the 802.11 protocol. However, for electronic devices that do not support 802.11k, 802.11r and 802.11v protocols, how to improve network switching efficiency has become an urgent problem to be solved.

In the traditional technology, when the current access point detects that the signal strength of the electronic device is less than the threshold, it considers that the electronic device is about to leave the signal range of the current access point, and then sends a scan request to the neighbor access point of the current access point. After scanning response messages from all neighbor access points, select one neighbor access point as the target access point, and then make the electronic device switch to the target access point. However, during the switching process, if the electronic device has no data to send, or the data transmission period is long, or the amount of data sent is small, the signal strength information of the electronic device cannot be effectively detected, which may cause network switching failure and affect the electronic device. communication quality.

The network switching method provided in this embodiment of the present application may be applied to the scenario shown in FIG. 1 . Fig. 1 shows a wireless communication networking consisting of multiple network devices, wherein the network devices may include wireless routing devices (including access points AP1, AP2, AP3) and a control terminal 4, and the access points are used for electronic devices 21 is connected to the wireless communication network, and the control terminal 4, as the control core of the wireless communication networking, is responsible for managing each access point; it should be noted that the embodiment of this application does not limit the number of access points, and the control terminal 4 can It is an access point selected from multiple access points, or an access point set separately in addition to these multiple access points, or a wireless controller AC or integrated in the access point. control device. Assuming that the electronic device 21 is currently connected to the network through AP1, during the movement of the electronic device 21 (such as moving from point A to point B), AP1 determines whether the electronic device 21 is about to leave AP1 through the received signal strength of the electronic device 21. The signal range, if so, is reported to the control terminal 4; the control terminal 4 determines a target access point (such as AP2) from the neighboring access points of AP1, thereby enabling the electronic device 21 to establish a communication connection with AP2. In order to improve the accuracy of the result of judging whether the electronic device 21 is about to leave the signal range of the AP1, a sampling period may be set in this embodiment of the present application. If the signal strength of the electronic device 21 cannot be detected within the sampling period, the AP1 will actively send the electronic 21 sends a data frame (such as a null data frame), and triggers the electronic device 21 to reply with an ACK response frame, so as to ensure that the signal strength of the electronic device 21 can be detected within the sampling period, thereby improving the communication quality of the electronic device.

Optionally, the above-mentioned multiple network devices may be connected by wire or wirelessly. In a possible implementation manner, the above-mentioned wireless communication network is a home local area network, an enterprise local area network, or other wireless local area networks in larger households. In some embodiments, the above-mentioned wireless routing device is a wireless switch used in a wireless communication network, a WiFi wireless router, an optical network terminal, a WiFi wireless repeater or a customer premise equipment (CPE) terminal, a portable terminal hotspot Wait. The above electronic equipment includes equipment connected to a wireless network through WIFI, such as wireless routers, mobile phones, tablet computers, notebooks, large-screen TVs, smart home items, personal digital assistants (personal digital assistants, PDAs), point of sales terminals (point of sales) , POS), car computer, etc.

FIG. 2 shows a structural example diagram of a network device. The network device includes structures such as a processor 110 , a memory 111 , a communication module 112 , and a power management module 113 .

The processor may include one or more of processors such as a central processing unit, an application processor, and a baseband processor. The processor can be the nerve center and command center of the wireless router. The processor can generate an operation control signal according to the instruction operation code and timing signal, and complete the control of fetching and executing instructions. The memory may be used to store computer-executable program code, which includes instructions. The processor executes various functional applications and data processing of the network device by executing the instructions stored in the memory. The memory may include a storage program area and a storage data area, such as storing data of a sound signal to be played, and the like. For example, the memory may be a double-rate synchronous dynamic random access memory (DDR) or a flash memory or the like.

The communication module can provide applications on network equipment including wireless local area network (such as WIFI network), Bluetooth, Zigbee, mobile communication network, global navigation satellite system (GNSS), frequency modulation (frequency modulation, FM), short distance Wireless communication technology (near fieldcommunication, NFC), infrared technology (infrared, IR) and other communication solutions. The communication module may be one or more devices integrating at least one communication processing module. The communication module may include an antenna, and the antenna may have only one array element, or may be an antenna array including multiple array elements. The communication module can receive electromagnetic waves through the antenna, frequency modulate and filter the electromagnetic wave signals, and send the processed signals to the processor. The communication module can also receive the signal to be sent from the processor, perform frequency modulation and amplification on it, and convert it into electromagnetic waves for radiation through the antenna.

The power management module can receive input from the battery and/or charger to supply power to the processor, memory and communication modules, etc.

It should be noted that the above-mentioned FIG. 2 does not constitute a limitation on the structure of the network device, and may include more or less components than those shown in the figure, or combine some components, or different components, for example, the network device may also include a display screen , indicator lights, motors, controls (such as buttons), gyroscope sensors, acceleration sensors, etc.

FIG. 3 is a schematic flowchart of an example of a network switching method provided by an embodiment of the present application, and the method includes:

S101 , the AP1 detects the signal strength of the electronic device for which the communication connection is established, and the signal strength of the electronic device is not detected within a preset sampling period.

Specifically, after the electronic device establishes a communication connection with an access point AP1, AP1 communicates with the electronic device on the same channel, and the access point (which can be understood as the current access point of the electronic device) can start the communication to the electronic device. The signal strength detection process, such as detecting the signal strength of the data frame sent by the electronic device. In this embodiment, a sampling period may be set to detect the signal strength of the data frame of the electronic device in the sampling period, and by detecting the signal strength of the electronic device, it can be inferred whether the communication state between the electronic device and the AP1 is good. Optionally, the AP1 may perform detection by collecting signal strength indication (received signal strength indication, RSSI) of the data frame of the electronic device.

Optionally, the AP1 can also perform signal strength detection according to the priority of the electronic device, and only when the priority of the electronic device is higher than the preset level, the AP1 detects it, so as to reduce the working power consumption of the AP1.

S102, the AP1 sends a null data frame to the electronic device.

Specifically, if AP1 does not receive a data frame sent by the electronic device within the above sampling period, it may be because the electronic device itself does not send a data frame within the sampling period, so AP1 may have errors in judging the state of the electronic device. Therefore, in this case, AP1 can actively send a null data frame (null data) to the electronic device to ensure that the electronic device can reply to a response frame after receiving the null data frame, that is, to ensure that the electronic device has a data frame to send out within the sampling period . Optionally, the structure of the above-mentioned empty data frame includes fields such as a source address, a target address, and data content, wherein the data content part is a null value.

Optionally, the above sampling period may be 1 second/time, 0.5 second/time, or 0.2 second/time, etc., which can be set according to actual needs.

S103, the electronic device replies an ACK frame to the AP1 according to the empty data frame.

Specifically, after receiving the null data frame sent by the AP1, the electronic device needs to reply to the AP1 with an ACK frame.

S104, the AP1 detects the RSSI of the ACK frame, and determines that the signal strength of the ACK frame is less than a preset signal strength threshold.

S105, AP1 sends first information to the control terminal, where the first information may carry the AP1 identification (APid), the electronic device identification (staid) and the channel identification (channelid); the first information may also include the signal strength of the communication between the AP1 and the electronic device or A communication state identifier, wherein the communication state identifier can indicate that the communication state between the electronic device and the AP1 is poor; the channel identifier (channelid) is the identifier of the channel that communicates after the electronic device establishes a communication connection with the AP1, and the channel corresponds to The working frequency of the electronic device communicating with AP1.

Specifically, in this embodiment, a signal strength threshold (such as -80 decibel milliwatts (dBm)) may be set. If AP1 determines that the signal strength of the received ACK frame is less than the signal strength threshold, it can be determined that the electronic device communicates with AP1 If the state is not good, the AP1 can report the state of the electronic device to the control terminal, so that the control terminal can determine a new access point for the electronic device as the target access point.

In another implementation manner, if AP1 detects the signal strength of the electronic device within the preset sampling period, it does not need to send an empty data frame to the electronic device, and can directly determine whether it is less than the signal strength threshold according to the detected signal strength , if it is less than the value, send the first information to the control terminal.

In the above network switching method, the current access point actively sends empty data frames to the electronic device to ensure that the electronic device sends out data frames within the sampling period, so that the current access point can collect the signal strength of the electronic device, which improves the current access point. The accuracy of the judgment result of the communication state between the electronic device determined by the access point and the current access point is improved, thereby improving the efficiency of network switching by the electronic device.

In an achievable embodiment, in order to improve the accuracy of the judgment result of the communication state between the electronic device and the AP1, the process of judging the communication state between the AP1 and the electronic device may include: the AP1 may periodically collect the RSSI of the data frame of the electronic device , if the RSSI of the data frame of the electronic device is not collected within the first sampling period (for example, 1 second/time), the empty data frame will be sent to the electronic device; if the RSSI of the data frame of the electronic device is collected within the first sampling period, the Determine whether the RSSI is less than the first signal strength threshold. Optionally, a quantity threshold (such as 3) can also be set. If the RSSIs of the 3 consecutively received response frames are all smaller than the first signal strength threshold, it can be determined that the communication state between AP1 and the electronic device is poor.

In another embodiment, regarding the process of judging the communication state between AP1 and the electronic device, reference may also be made to the schematic diagram shown in FIG. 4 , and the process may include:

S201, the AP1 collects the RSSI of the data frame of the electronic device in a first sampling period, specifically, the first sampling period may be 1 second/time.

S202, it is judged whether the RSSI of the data frame of the electronic device is collected, and if so, S205 is executed, and if not, S203 is executed.

S203 , the RSSI of the data frame of the electronic device is not collected in the first sampling period, and the AP1 sends an empty data frame to the electronic device.

S204, when the electronic device receives the empty data frame, it returns an ACK frame to the AP1, and the AP1 collects the RSSI of the ACK frame replied by the electronic device according to the empty data frame.

S205, if the RSSI of the electronic device data frame is collected in the first sampling period, determine whether M consecutive RSSIs (eg, 3) are smaller than the first signal strength threshold; if so, go to S206; if not, go to S201.

S206, the AP1 collects the RSSI of the data frame of the electronic device in the second sampling period. Specifically, the second sampling period may be 0.2 seconds/time.

S207, it is judged whether the RSSI of the data frame of the electronic device is collected, if it is, execute S210, and if not, execute S208.

S208 , the RSSI of the data frame of the electronic device is not collected in the second sampling period, and the AP1 sends an empty data frame to the electronic device.

In an implementation manner, the AP1 may also not collect the RSSI of the data frame of the electronic device in the second sampling period, but directly send the empty data frame to the electronic device at the frequency of the sampling period.

S209, when the electronic device receives the empty data frame, it will reply to the AP1 with an ACK frame, and the AP1 collects the RSSI of the ACK frame replied by the electronic device according to the empty data frame.

S210, if the RSSI of the data frame of the electronic device is collected in the second sampling period, determine whether the RSSI of the preset ratio (eg 70%) of the N (eg 20) RSSIs are all smaller than the second signal strength threshold; if so, execute S211 ; if not, execute S206.

S211, it is determined that the communication state between the AP1 and the electronic device is not good.

In another implementation manner, if the electronic device has its own communication data frame to send out in the process of sending the empty data frame to the electronic device, the AP1 can detect the signal strength of the communication data frame and the ACK frame respectively. Signal strength, AP1 can select the detected signal strength later in time for judgment.

In another implementation manner, if in step S210, after multiple rounds (such as 3 rounds) of judgment, among the RSSIs received by the AP1, the RSSIs of the preset ratio are not less than the second signal strength threshold, then the execution can be returned to the execution again. S201. Continue to collect RSSI of the data frame of the electronic device in the first sampling period, so as to reduce the working power consumption of the AP1.

In another implementation manner, if AP1 can detect the signal strength of the electronic device in the first sampling period or the second sampling period, it does not need to send an empty data frame to the electronic device, and can directly determine the signal strength based on the detected signal strength. Is it less than the signal strength threshold.

The above network switching method, by dynamically adjusting the sampling period and judging the magnitude of the signal strength multiple times, can further improve the accuracy of the judgment result of the communication state with the electronic device determined by the current access point, so as to realize a more stable and reliable network switching process.

In order to facilitate the understanding of the entire process of the above network switching method, the method is described again with an embodiment below. Wherein, as shown in Figure 5, the above method may include:

S301 , the AP1 detects the signal strength of the electronic device for which the communication connection is established, and the signal strength of the electronic device is not detected within a preset sampling period.

S302, the AP1 sends a null data frame to the electronic device.

S303, the electronic device replies an ACK frame to the AP1 according to the empty data frame.

S304, the AP1 detects the RSSI of the ACK frame, and determines that the signal strength of the ACK frame is less than a preset signal strength threshold.

S305, the AP1 sends the first information to the control terminal.

Wherein, S301-S305 are similar to S101-S105 in the foregoing embodiment, and reference may be made to the foregoing description, which will not be repeated here.

S306, the control terminal searches for the neighbor access point of AP1.

After AP1 reports the status of the electronic device to the control terminal, the control terminal can search for the neighbor access points of AP1, and determine the target access point (referred to as AP2) from the neighbor access points, so that the electronic device will communicate with AP1. The connection switches to the communication connection with AP2.

Specifically, searching for a neighbor access point depends on the network neighbor relationship of AP1: if the access points are connected by wire, the corresponding neighbor access point can be determined according to the geographical location of the access point, and the access point's The geographic location can be recorded in the form of parameters when deploying access points; if the access points are wireless mesh networking, the neighbor access points can be determined according to the connection relationship of each access point and channel detection. As an example and not a limitation, the control terminal may send an instruction instruction to all access points, instructing all access points to periodically broadcast a message with the maximum transmit power, the message at least includes its own ID and location, then the AP1 can The received broadcast message is the broadcast message sent by its neighbor access point, whereby the neighbor access point of AP1 can be determined.

In an achievable embodiment, after finding the neighbor access points of AP1, the control terminal may first query the load status of each neighbor access point. If the load of a neighbor access point is already full, it will not Consider the possibility of it being a target access point, i.e. it can be culled from neighbor access points.

S307, the control terminal sends a first instruction to the AP1, instructing the AP1 to send an empty data frame to the electronic device, and the first instruction carries the electronic device identification (staid).

The control terminal may instruct the AP1 to send a null data frame to the electronic device at a fixed frequency.

S308, the control terminal sends a second instruction to each neighbor access point, instructing the neighbor access point to monitor the signal strength of the electronic device data frame, and the second instruction carries the electronic device identifier (staid) and channel identifier (channelid).

Specifically, the control terminal unicasts the second instruction to each neighbor access point. Assuming that the channel when the electronic device communicates with AP1 is channelA, then the neighbor access point needs to switch the channel it is working on to this channelA to monitor Therefore, the second instruction may further instruct the working channel of the neighbor access point to switch to the channel where the electronic device is located, so as to monitor the signal strength of the electronic device.

In another implementation manner, if there are multiple electronic devices communicating with AP1 on the same channel, the neighbor access point may also monitor the signal strength of other electronic devices, then the neighbor access point can to identify the electronic device to be monitored.

S309, the AP1 sends a null data frame to the electronic device at a fixed frequency.

S310, the electronic device replies an ACK frame to the AP1, and the neighbor access point monitors the signal strength of the ACK frame returned by the electronic device.

Specifically, after receiving the null data frame sent by AP1, the electronic device can reply to AP1 with an ACK frame. Since the communication channel of the neighbor access point is also switched to the communication channel where the electronic device is located, the neighbor access point The point can also monitor the ACK frame, and can obtain the signal strength of the ACK frame.

Exemplarily, if each access point AP is connected to the control terminal by wire, communication between the access points and the control terminal can be carried out through wired channels, and each AP can be connected to the connected terminal on different wireless channels. For example, the channel through which AP1 communicates with the electronic device may be wireless channel 2, and the channel through which the neighbor access point AP2 communicates with the access device may be wireless channel 3; if each access point AP and the control terminal are connected wirelessly , then the communication channel between the control terminal and each access point AP is the same channel (it can be wireless channel 1), each AP can communicate with its connected devices on different wireless channels, and AP1 communicates with the above electronic The channel through which the device communicates may be wireless channel 2, and the channel through which the neighbor access point communicates with the access device may be wireless channel 3.

In this embodiment, after the neighbor access point receives the second instruction from the control terminal, it can use the time-sharing mode to communicate with the access device on channel 3 during the first period, and switch to channel 2 for monitoring during the second period. The signal strength of the above electronic device is then switched to channel 3 to communicate with the access device in the next period, and so on. Optionally, when the neighbor access point switches channels, it may affect the network status of the access device that has access to the neighbor access point. To reduce this impact, you can also use the auxiliary chip installed in the neighbor access point. To monitor the signal strength of the electronic device, that is, the auxiliary chip is monitoring on channel 2, while the neighbor access point itself is still working on the original channel 3.

Optionally, the neighbor access point can stop the above-mentioned time-sharing working mode after monitoring the signal strength of the ACK frame of the electronic device, or stop the working mode after monitoring the signal strength of a certain number of ACKs, or stop after a certain period of time. This working mode restores the continuous working state on channel 3.

Optionally, if the electronic device has its own communication data frame to send out during the process of sending the empty data frame to the electronic device, the neighbor access point can also monitor the signal strength of the communication data frame and the ACK frame respectively. Signal strength, the neighbor access point can select the signal strength that is later in the monitored time for calculation.

S311, the neighbor access point sends the available bandwidth and the signal strength of the ACK frame of the electronic device to the control terminal.

Among them, after the neighbor access point receives the second instruction, it can set a detection time period (for example, 4 seconds), and each neighbor access point collects the signal strength of multiple data frames of the electronic device within the detection time period. The intensity is calculated and sent to the control. As an example but not a limitation, if the neighbor access point APx collects the signal strengths of n ACK frames, the signal strengths reported to the control terminal may be:

Among them, RSSI _i (1≤i≤n) is the signal strength of the i-th ACK frame collected by APx, RSSI _min is the minimum signal strength of n ACK frames, and m is an empirical value that can be adjusted according to actual needs.

The available bandwidth reported by APx to the controller can be:

Wherein, BAND _i (1≤i≤n) is the available bandwidth when APx collects the i-th ACK frame, and BAND _max is the maximum bandwidth of APx. In this step, the current access point sends empty data frames to ensure that the neighbor access points can detect the signal strength of the data frames of the electronic equipment, and report the detection results to the control terminal, so that the control terminal can determine a better target access point .

S312, the control end sends a third instruction to stop constructing an empty data frame to the AP1, where the third instruction carries an electronic device identifier (staid).

Specifically, after receiving the available bandwidth and signal strength results reported by each neighbor access point, the controller may send a third instruction to AP1 to make AP1 stop sending empty data frames to the electronic device.

S313, the control terminal determines AP2 according to the information reported by each neighbor access point.

Specifically, after receiving the signal strength and available bandwidth reported by each neighbor access point, the control terminal can calculate the weight of each neighbor access point by the following formula:

Then, the control terminal can select the access point with the largest weight as the target access point AP2.

Optionally, the execution order of S312 and S312 may be replaced, that is, after the control terminal determines the target access point AP2, it sends a third instruction to AP1.

S314, the control terminal sends a fourth instruction to add the electronic device to the communication blacklist to the other neighbor access points except AP2, where the fourth instruction carries the electronic device identification (staid).

S315, the other neighbor access points add the electronic device to the communication blacklist.

Among them, after the other neighbor access points add the electronic device to the communication blacklist, even if the electronic device searches for the signals of the other neighbor access points, it cannot establish a communication connection with these neighbor access points.

S316, the control terminal sends a fifth instruction to the AP1 to disconnect the communication connection with the electronic device, where the fifth instruction carries the electronic device identification (staid).

S317, the AP1 disconnects the communication connection with the electronic device.

The fifth instruction may also instruct the AP1 to add the electronic device to the communication blacklist after disconnecting the communication connection with the electronic device, so as to avoid the possibility of the subsequent electronic device establishing a communication connection with the AP1.

S318, the electronic device sends an access request to the searched access point, where the access request carries an electronic device identifier (staid).

After the electronic device is disconnected from the AP1, it can continue to search for the access point signal, and when a certain access point signal is found, it can send an access request to the access point. Among them, these access points may include AP2, and may also include other neighbor access points except AP2, but because the other neighbor access points have added the electronic device to the communication blacklist, even if the electronic device sends an access request , and cannot establish a communication connection with these neighbor access points. Therefore, the final electronic device can only establish a communication connection with AP2.

S319, the AP2 establishes a communication connection with the electronic device.

S320, AP2 sends second information to the control terminal, where the second information represents communication connection information between AP2 and the electronic device, and the second information carries an access point identifier (APid) and an electronic device identifier (staid).

Optionally, the time period for the control terminal to notify other neighbor access points to add the electronic device to the communication blacklist can be preset (for example, set to 2 seconds), and after the timeout, the remaining neighbor access points can remove the electronic device from the communication blacklist. Or, when AP2 reports the information that the connection with the electronic device has been established to the control terminal, the control terminal sends the blacklist removal instruction to the remaining neighbor access points, so that the other neighbor access points remove the electronic device from the communication blacklist. removed in. In this embodiment, by setting the communication blacklist, the electronic device can be accurately connected to the target access point, which further improves the efficiency of network switching by the electronic device.

In another embodiment, the above steps of S307-S313 can also be implemented in the following manner, and other steps are similar to the above embodiment: after finding each neighbor access point, the control terminal can query the load status of each neighbor access point, The neighbor access point with the least load is directly used as the target access point AP2.

In another embodiment, the above-mentioned first instruction can also instruct AP1 to send the empty data frame only once, then S309 can also be replaced with: AP1 sends the empty data frame to the electronic device once; then the step of S313 can also be implemented in the following manner: Other steps are similar to the above-mentioned embodiments: the control terminal selects the neighbor access point corresponding to the maximum signal strength as the target access point AP2 according to the received signal strengths.

In another embodiment, the above steps S311-S313 can also be implemented in the following manner, and other steps are similar to the above embodiment: after each neighbor access point detects the signal strength of the electronic device, it can immediately calculate the signal strength and The available bandwidth at this time is reported to the control terminal; the control terminal can set a detection duration, it only receives the signal strength and available bandwidth sent by the neighbor access point within the detection duration, and if it exceeds the detection duration, it will send to AP1 to stop constructing empty data The third instruction of the frame; then the control terminal uses the calculation formula in the above S311 to calculate the RSSI _APx and BAND _APx of each neighbor access point, and then uses the formula in S313 to calculate the weight of each neighbor access point, and then selects the largest weight value The access point is used as the target access point AP2.

For the implementation process of each step in FIG. 5 , reference may be made to the description of the foregoing embodiment, and the implementation principle and technical effect thereof are similar, and are not repeated here.

Examples of the network switching method provided by the embodiments of the present application are described in detail above. It can be understood that, in order to implement the above-mentioned functions, the network device includes corresponding hardware and/or software modules for executing each function. Those skilled in the art should easily realize that the present application can be implemented in hardware or a combination of hardware and computer software with the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functionality for each particular application in conjunction with the embodiments, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the network device may be divided into functional modules according to the above example of the network switching method. For example, each function may be divided into each functional module, such as a storage unit, a processing unit, a communication unit, etc., or two or two More than one function is integrated in one module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

The network device provided in this embodiment is used to execute the above-mentioned network switching method, and thus can achieve the same effect as the above-mentioned implementation method.

In the case of an integrated unit, the network device may also include a processing module, a storage module and a communication module. The processing module may be used to control and manage the actions of the network device. The storage module can be used to support the network device to execute stored program codes and data, and the like. The communication module can be used to support the communication between the network device and other devices.

The processing module may be a processor or a controller. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination comprising one or more microprocessors, a combination of digital signal processing (DSP) and a microprocessor, and the like. The storage module may be a memory. The communication module may specifically be a device that interacts with other electronic devices, such as a radio frequency circuit, a Bluetooth chip, and a Wi-Fi chip.

In one embodiment, when the processing module is a processor and the storage module is a memory, the network device involved in this embodiment may be a device having the structure shown in FIG. 2 .

Embodiments of the present application further provide a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the processor is made to execute the description in any of the foregoing embodiments. network switching method.

Embodiments of the present application further provide a computer program product, which, when the computer program product runs on a computer, causes the computer to execute the above-mentioned relevant steps, so as to implement the network switching method in the above-mentioned embodiment.

In addition, the embodiments of the present application also provide an apparatus, which may specifically be a chip, a component or a module, and the apparatus may include a connected processor and a memory; wherein, the memory is used for storing computer execution instructions, and when the apparatus is running, The processor can execute the computer-executed instructions stored in the memory, so that the chip executes the network device method in each of the foregoing method embodiments.

Wherein, the network device, computer-readable storage medium, computer program product or chip provided in this embodiment are all used to execute the corresponding method provided above, therefore, the beneficial effects that can be achieved may refer to the above-provided method. The beneficial effects in the corresponding method will not be repeated here.

From the description of the above embodiments, those skilled in the art can understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated by different The function module is completed, that is, the internal structure of the device is divided into different function modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or May be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may be one physical unit or multiple physical units, that is, may be located in one place, or may be distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, which are stored in a storage medium , including several instructions to make a device (which may be a single chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk and other media that can store program codes.

The above content is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (19)

1. A network switching system is characterized by comprising a controller, a first wireless routing device, at least one second wireless routing device and an electronic device, wherein the first wireless routing device is in wireless communication connection with the electronic device;

the first wireless slave device detects the signal intensity when the electronic device communicates with the first wireless slave device, and when the signal intensity is smaller than a preset signal intensity threshold value, the first wireless slave device sends first information to the controller;

the controller sends a first instruction to a first wireless device according to the first information, wherein the first instruction is used for instructing the first wireless device to send a first data frame to the electronic device;

the first wireless device sends a first data frame to the electronic device according to the first instruction, and the first data frame is used for replying a first reply frame by the electronic device according to the first data frame;

the controller sends a second instruction to at least one second wireless routing device according to the first information, wherein the second instruction is used for instructing the second wireless routing device to monitor the first reply frame and report the signal strength of the first reply frame;

the second wireless routing equipment monitors the first reply frame replied by the electronic equipment according to the second instruction, acquires the signal intensity of the first reply frame, and sends the signal intensity of the first reply frame to the controller;

the controller determines a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, so that the electronic device switches the communication connection with the first wireless routing device to the communication connection with the third wireless routing device.

2. The system of claim 1, wherein the first wireless device detects a signal strength of the electronic device when communicating with the first wireless device, comprising:

the first wireless device collects signal strength of the electronic device when communicating with the first wireless device in a first sampling period;

if the first wireless routing device does not acquire the signal strength in the first sampling period, sending a second data frame to the electronic device;

and the first wireless equipment acquires the signal strength of a second reply frame sent by the electronic equipment according to the second data frame.

3. The system of claim 2, wherein the first wireless device, after acquiring the signal strength of the second reply frame sent by the electronic device according to the second data frame, comprises:

when the signal intensity of a second reply frame acquired by the first wireless device is smaller than a first signal intensity threshold value, acquiring the signal intensity of the electronic device in a second sampling period, wherein the second sampling period is smaller than the first sampling period;

if the signal intensity of the electronic equipment is not acquired in the second sampling period, sending a third data frame to the electronic equipment;

and acquiring the signal intensity of a third reply frame sent by the electronic equipment according to the third data frame.

4. The system according to any of claims 1-3, wherein the second wireless routing device obtaining the signal strength of the first reply frame and sending the signal strength of the first reply frame to the controller comprises:

and the second wireless routing equipment acquires the signal strength of the first return frame and sends the signal strength of the first return frame and the available bandwidth of the second wireless routing equipment to the controller.

5. The system of claim 1, wherein the electronic device switching the communication connection with the first wireless routing device to the communication connection with the third wireless routing device comprises:

the controller sends fourth instructions to the rest of the second wireless routing devices except the third wireless routing device, wherein the fourth instructions are used for instructing the rest of the wireless routing devices to add the electronic device to a communication blacklist;

the controller sends a fifth instruction to the first wireless controlled device, wherein the fifth instruction is used for instructing the first wireless controlled device to disconnect the communication connection with the electronic device;

the electronic equipment sends a network access request to the second wireless routing equipment;

and the third wireless routing equipment receives the network access request and establishes communication connection with the electronic equipment.

6. A network handover method performed by a first wireless device, comprising:

detecting signal strength when an electronic device communicates with the first wireless slave device, and sending first information to a controller when the signal strength is smaller than a preset signal strength threshold, wherein the electronic device is in wireless communication connection with the first wireless slave device, and the first information is used for instructing the controller to send a first instruction to the first wireless slave device;

receiving a first instruction sent by the controller, and sending a first data frame to the electronic device according to the first instruction, wherein the first data frame is used for instructing the electronic device to reply a first reply frame based on the first data frame;

receiving a fifth instruction sent by the controller, wherein the fifth instruction is used for instructing the first wireless device to disconnect the communication connection with the electronic device.

7. The method of claim 6, wherein detecting the signal strength of the electronic device when communicating with the first wireless device comprises:

acquiring signal strength of the electronic equipment and the first wireless device during communication within a first sampling period;

if the signal intensity of the electronic equipment is not acquired in the first sampling period, sending a second data frame to the electronic equipment;

and acquiring the signal intensity of a second reply frame sent by the electronic equipment according to the second data frame.

8. The method of claim 7, wherein after obtaining the signal strength of the second reply frame sent by the electronic device according to the second data frame, the method further comprises:

when the signal intensity of the acquired second reply frame is smaller than a first signal intensity threshold value, acquiring the signal intensity of the electronic equipment in a second sampling period, wherein the second sampling period is smaller than the first sampling period;

if the signal intensity of the electronic equipment is not acquired in the second sampling period, sending a third data frame to the electronic equipment;

and acquiring the signal intensity of a third reply frame sent by the electronic equipment according to the third data frame.

9. The method of claim 6, further comprising:

and receiving a third instruction sent by the controller, and stopping sending a first data frame to the electronic equipment according to the third instruction.

10. The method of any of claims 6-9, wherein the first data frame includes a source address, a destination address, and a data content, the data content being a null value.

11. A network handover method, performed by a controller, comprising:

receiving first information sent by a first wireless device;

sending a first instruction to the first wireless routing device according to the first information, and sending a second instruction to at least one second wireless routing device, where the first instruction is used to instruct the first wireless routing device to send a first data frame to an electronic device, the second instruction is used to instruct the second wireless routing device to monitor a first reply frame sent by the electronic device and report the signal strength of the first reply frame, and the first reply frame replies to the electronic device based on the first data frame;

and determining a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame, so that the electronic device switches the communication connection with the first wireless routing device to the communication connection with the third wireless routing device.

12. The method of claim 11, wherein determining a third wireless routing device from the at least one second wireless routing device according to the signal strength of the first reply frame comprises:

acquiring the signal strength of a first reply frame and the available bandwidth of the second wireless routing device;

and determining a third wireless routing device from at least one second wireless routing device according to the signal strength of the first reply frame, the available bandwidth of the second wireless routing device and a preset calculation model.

13. The method of claim 11 or 12, wherein prior to said determining a third wireless routing device from the at least one second wireless routing device based on the signal strength of the first reply frame, the method further comprises:

sending a third instruction to the first wireless device, the third instruction being used to instruct the first wireless device to stop sending the first data frame to the electronic device.

14. The method of claim 11 or 12, wherein after said determining a third wireless routing device from the at least one second wireless routing device based on the signal strength of the first reply frame, the method further comprises:

and sending fourth instructions to the rest of the second wireless routing devices except the third wireless routing device, wherein the fourth instructions are used for instructing the rest of the wireless routing devices to add the electronic device to a communication blacklist.

15. The method of claim 14, wherein causing the electronic device to switch the communication connection with the first wireless routing device to the communication connection with the third wireless routing device comprises:

sending a fifth instruction to the first wireless controlled device, the fifth instruction being for instructing the first wireless controlled device to disconnect communication with the electronic device.

16. The method of claim 11, wherein the first data frame comprises a source address, a destination address, and a data content, and wherein the data content is null.

17. A wireless routing device, comprising: a processor and a memory; coupled to the processor and a memory storing program instructions that, when executed by the processor, perform the method of any of claims 6 to 10.

18. A controller, comprising: a processor and a memory; coupled to the processor and a memory storing program instructions that, when executed by the processor, perform the method of any of claims 11 to 16.

19. A computer-readable storage medium, in which a computer program is stored, the computer program comprising program instructions which, when executed by a processor, cause the processor to carry out the method of any one of claims 6 to 10, or cause the processor to carry out the method of any one of claims 11 to 16.

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