CN116709438A

CN116709438A - Wireless network switching method, related equipment and wireless network

Info

Publication number: CN116709438A
Application number: CN202210182508.2A
Authority: CN
Inventors: 司小书; 李苗; 谌金豆
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2023-09-05
Also published as: WO2023160436A1

Abstract

The embodiment of the application discloses a wireless network switching method, related equipment and a wireless network, which are used for improving the efficiency of frequency band switching and reducing the interruption time of transmitted service. The method of the embodiment of the application comprises the following steps: the first access equipment communicates with the terminal equipment on a first frequency band according to the access information; when the first access device determines that the terminal device needs frequency band switching, the first access device communicates with the terminal device on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

Description

Wireless network switching method, related equipment and wireless network

Technical Field

The present application relates to the field of communications, and in particular, to a method for switching wireless networks, related devices, and a wireless network.

Background

An Access Point (AP) is capable of supporting multiple frequency bands simultaneously. A Station (STA) communicates with a frequency band supported by an AP at the same time.

After the STA and the AP are accessed based on the detection flow, the authentication flow, the association flow, the key interaction flow and other access flows, the STA and the AP communicate on the first frequency band. In the case where the STA and the AP need to switch from the first frequency band to the second frequency band, the STA and the AP need to be on-line in the first frequency band and on-line in the second frequency band again based on the access procedure, so that the AP and the STA can communicate in the second frequency band.

However, since the AP and the STA need to perform the offline and the re-online processes, the processes may cause frequent signaling interaction between the STA and the AP, which reduces the efficiency of frequency band switching. And the AP and the STA perform the processes of the offline and the re-online, the time of the interruption of the traffic transmitted between the AP and the STA may be increased.

Disclosure of Invention

The embodiment of the invention provides a wireless network switching method, related equipment and a wireless network, which can effectively improve the efficiency of frequency band switching and reduce the interruption time of transmitted service.

An embodiment of the present invention provides a method for switching wireless networks, where the method includes: the first access equipment communicates with the terminal equipment on a first frequency band according to the access information; when the first access device determines that the terminal device needs frequency band switching, the first access device communicates with the terminal device on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

According to the method, the first access device and the terminal device communicate with the same access information on the first frequency band and the second frequency band, so that the first access device and the terminal device do not need to execute the offline process of the first frequency band and the access process of the second frequency band in the frequency band switching process, and the frequency band switching efficiency is effectively improved. And the time delay of switching the first access equipment and the terminal equipment from the first frequency band to the second frequency band is effectively reduced, and the interruption time of the service interacted by the first access equipment and the terminal equipment is reduced.

Based on the first aspect, in an optional implementation manner, before the first access device communicates with the terminal device on the first frequency band according to the access information, the method further includes: and the first access device sets the BSSID corresponding to the first frequency band and the BSSID corresponding to the second frequency band as the BSSID.

In the implementation manner, under the condition that the first access device sets the BSSID corresponding to the first frequency band and the BSSID corresponding to the second frequency band to be the same BSSID, the first access device is ensured to communicate with the terminal device on the first frequency band and the second frequency band by using the same access information.

Based on the first aspect, in an optional implementation manner, before the first access device communicates with the terminal device on the second frequency band according to the access information, the method further includes: the first access device sends first switching negotiation information to the terminal device, wherein the first switching negotiation information is used for indicating the terminal device to switch from the first frequency band to the second frequency band; the first access device receives first switching confirmation information from the terminal device, wherein the first switching confirmation information is used for confirming that the terminal device is switched from the first frequency band to the second frequency band.

In the implementation manner, the first access device determines that the terminal device needs to be switched from the first frequency band to the second frequency band, the terminal device and the first access device negotiate through the first switching negotiation information and the first switching confirmation information, the first access device and the terminal device do not need to execute the offline process in the first frequency band and do not need to execute the access process in the second frequency band, and the frequency band switching efficiency is effectively improved.

Based on the first aspect, in an optional implementation manner, before the first access device communicates with the terminal device on the second frequency band according to the access information, the method further includes: the first access device receives second switching negotiation information from the terminal device, wherein the second switching negotiation information is used for requesting to switch from the first frequency band to the second frequency band; and the first access equipment sends second switching confirmation information to the terminal equipment, wherein the second switching confirmation information is used for confirming switching from the first frequency band to the second frequency band.

In the implementation manner, the first access device determines that the terminal device needs to be switched from the first frequency band to the second frequency band, the terminal device and the first access device negotiate through the second switching negotiation information and the second switching confirmation information, the first access device and the terminal device do not need to execute the offline process in the first frequency band and do not need to execute the access process in the second frequency band, and the frequency band switching efficiency is effectively improved.

Based on the first aspect, in an optional implementation manner, before the first access device communicates with the terminal device on the second frequency band according to the access information, the method further includes: the first access device sends first indication information to the terminal device, wherein the first indication information is used for indicating the terminal device to communicate with the first access device on the second frequency band by using the access information.

In the implementation manner, the first access device indicates the terminal device to perform the access procedure on the first frequency band and the second frequency band in the frequency band switching process by sending the first indication information to the terminal device, so that the efficiency of the terminal device in performing the frequency band switching is improved.

Based on the first aspect, in an optional implementation manner, when the first frequency band and the second frequency band meet a first condition, the terminal device needs frequency band switching, where the first condition includes that a target parameter of the first frequency band is smaller than a target parameter of the second frequency band, where the target parameter is at least one of the following:

received signal strength indication, RSSI, channel quality, transmission rate, reference signal received power, RSRP, reference signal received quality, RSRQ, or signal to interference plus noise ratio, SINR;

Alternatively, the first condition includes that the channel load of the first frequency band is greater than the channel load of the second frequency band.

In the implementation manner, under the condition that the first frequency band and the second frequency band meet the first condition, the first access equipment and the terminal equipment are determined to be switched from the first frequency band to the second frequency band, so that the communication quality between the first access equipment and the terminal equipment is ensured.

Based on the first aspect, in an optional implementation manner, when the first frequency band meets a second condition, the terminal device needs to switch the frequency band, where the second condition includes that a target parameter of the first frequency band is less than or equal to a switching threshold, where the target parameter is at least one of the following:

alternatively, the second condition includes that the channel load of the first frequency band is greater than a channel load threshold.

In the implementation manner, when the first frequency band meets the second condition, the first access equipment and the terminal equipment are determined to need to perform frequency band switching so as to ensure the communication quality between the first access equipment and the terminal equipment.

A second aspect of an embodiment of the present invention provides a method for switching a wireless network, where the method includes: the second access equipment acquires access information, wherein the access information is used for the first access equipment to communicate with the terminal equipment on a first frequency band; when the second access device determines that the terminal device needs to communicate with the second access device, the second access device communicates with the terminal device on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

According to the method, the first access device and the second access device communicate with the terminal device through the same access information on the first frequency band and the second frequency band, so that the first access device and the terminal device do not need to execute the offline process on the first frequency band in the frequency band switching process, the second access device and the terminal device do not need to execute the access process on the second frequency band, and the frequency band switching efficiency is effectively improved. And the time delay of switching the terminal equipment from the first frequency band to the second frequency band is effectively reduced, and the interruption time of the service is reduced.

Based on the second aspect, in an optional implementation manner, the communicating, by the second access device, with the terminal device on the second frequency band according to the access information includes: the second access device receives the access information from the first access device before the second access device determines that the terminal device needs to communicate with the second access device; and the second access equipment communicates with the terminal equipment on a second frequency band according to the access information.

In this implementation manner, the first access device may send the access information to the second access device before determining that the terminal device needs to switch the frequency band, so as to ensure that the first frequency band of the first access device and the second frequency band of the second access device use the same access information to communicate with the terminal device.

Based on the second aspect, in an optional implementation manner, the communicating, by the second access device, with the terminal device on the second frequency band according to the access information includes: after the second access device determines that the terminal device needs to communicate with the second access device, the second access device receives the access information from the first access device; and the second access equipment communicates with the terminal equipment on a second frequency band according to the access information.

In this implementation manner, after determining that the terminal device needs to switch the frequency band, the first access device may send the access information to the second access device, so as to ensure that the first frequency band of the first access device and the second frequency band of the second access device use the same access information to communicate with the terminal device.

Based on the second aspect, in an optional implementation manner, before the second access device communicates with the terminal device on the second frequency band according to the access information, the method further includes: the second access device receives communication indication information, where the communication indication information is used to indicate that the terminal device needs to communicate with the second access device on a second frequency band.

In this implementation manner, the second access device determines, based on the communication indication information, that the terminal device needs to be switched to a second frequency band supported by the second access device. To ensure that the second access device communicates with the terminal device on the second frequency band according to the access information.

Based on the second aspect, in an optional implementation manner, before the second access device communicates with the terminal device on the second frequency band according to the access information, the method further includes: the second access device sends second indication information to the terminal device, wherein the second indication information is used for indicating the terminal device to communicate with the second access device on the second frequency band by using the access information.

A third aspect of an embodiment of the present invention provides a method for switching a wireless network, where the method includes: the terminal equipment communicates with the first access equipment on the first frequency band according to the access information; when the terminal equipment determines that the frequency band switching is needed, the terminal equipment communicates with a target access equipment on a second frequency band according to the access information, wherein the target access equipment is the first access equipment or the second access equipment, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

For an explanation of the beneficial effects of this aspect, please refer to the first aspect, and detailed descriptions thereof are omitted.

Based on the third aspect, in an optional implementation manner, the target access device is the first access device, and before the terminal device communicates with the target access device on the second frequency band according to the access information, the method further includes: the terminal equipment receives first switching negotiation information from the first access equipment, wherein the first switching negotiation information is used for indicating the terminal equipment to switch from the first frequency band to the second frequency band; the terminal equipment sends first switching confirmation information to the first access equipment, wherein the first switching confirmation information is used for confirming that the terminal equipment is switched from the first frequency band to the second frequency band.

Based on the third aspect, in an optional implementation manner, the target access device is the first access device, and before the terminal device communicates with the target access device on the second frequency band according to the access information, the method further includes: the terminal equipment sends second switching negotiation information to the first access equipment, wherein the second switching negotiation information is used for the terminal equipment to request switching from the first frequency band to the second frequency band; the terminal equipment receives second switching confirmation information from the first access equipment, wherein the second switching confirmation information is used for confirming that the terminal equipment is switched from the first frequency band to the second frequency band.

Based on the third aspect, in an optional implementation manner, the target access device is the second access device, and before the terminal device communicates with the target access device on the second frequency band according to the access information, the method further includes: the terminal device sends communication indication information to the second access device, wherein the communication indication information is used for indicating that the terminal device which is in communication with the first access device needs to be in communication with the second access device on a second frequency band.

Based on the third aspect, in an optional implementation manner, the target access device is the first access device, and before the terminal device communicates with the target access device on the second frequency band according to the access information, the method further includes: the terminal device receives first indication information from the first access device, wherein the first indication information is used for indicating the terminal device to communicate with the first access device on the second frequency band by using the access information.

Based on the third aspect, in an optional implementation manner, the target access device is the second access device, and before the terminal device communicates with the target access device on the second frequency band according to the access information, the method further includes: the terminal device receives second indication information from the second access device, where the second indication information is used to instruct the terminal device to use the access information to communicate with the second access device on the second frequency band.

A fourth aspect of an embodiment of the present invention provides an access device, the access device including a processor, a memory, and a transceiver; the processor is respectively connected with the memory and the transceiver; the processor is used for controlling the transceiver to communicate with the terminal equipment on the first frequency band according to the access information; when the processor determines that the terminal equipment needs frequency band switching, the processor is used for controlling the transceiver to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID. In this aspect, for a description of a procedure for performing wireless network handover and beneficial effects, please refer to the first aspect, and detailed description is omitted.

A fifth aspect of an embodiment of the present invention provides an access device, the access device including a processor, a memory, and a transceiver; the processor is respectively connected with the memory and the transceiver; the processor is used for acquiring access information, and the access information is used for the communication of another access device with the terminal device on the first frequency band; when the processor determines that the terminal equipment needs to communicate with the access equipment, the processor is used for controlling the transceiver to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID. In this aspect, for a description of the procedure for performing wireless network handover and beneficial effects, please refer to the second aspect, and detailed description is omitted.

A sixth aspect of the embodiment of the present invention provides a terminal device, where the terminal device includes a processor, a memory, and a transceiver; the processor is respectively connected with the memory and the transceiver; the processor is used for controlling the transceiver to communicate with the first access equipment on the first frequency band according to the access information; when the processor determines that the frequency band is required to be switched, the processor controls the transceiver to communicate with a target access device on a second frequency band according to the access information, wherein the target access device is the first access device or the second access device, the first frequency band and the second frequency band both correspond to the same Basic Service Set Identifier (BSSID), and the access information comprises the BSSID. In this aspect, for a description of a procedure for performing wireless network handover and beneficial effects, please refer to the third aspect, and detailed description is omitted.

A seventh aspect of the embodiment of the present invention provides an access device, where the access device includes a transceiver module and a processing module; the processing module is used for controlling the transceiver module to communicate with the terminal equipment on the first frequency band according to the access information; when the processing module determines that the terminal equipment needs frequency band switching, the processing module controls the receiving and transmitting module to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID. In this aspect, for a description of a procedure for performing wireless network handover and beneficial effects, please refer to the first aspect, and detailed description is omitted.

An eighth aspect of the present invention provides an access device, where the access device includes a transceiver module and a processing module; the processing module is used for acquiring access information, wherein the access information is used for the communication of another access device with the terminal device on a first frequency band; when the processing module determines that the terminal equipment needs to communicate with the second access equipment, the processing module controls the transceiver module to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID. In this aspect, for a description of the procedure for performing wireless network handover and beneficial effects, please refer to the second aspect, and detailed description is omitted.

A ninth aspect of the embodiment of the present invention provides a terminal device, where the terminal device includes a transceiver module and a processing module; the processing module is used for controlling the transceiver module to communicate with the first access equipment on the first frequency band according to the access information; when the processing module determines that the frequency band is required to be switched, the processing module controls the receiving-transmitting module to communicate with a target access device on a second frequency band according to the access information, wherein the target access device is the first access device or the second access device, the first frequency band and the second frequency band both correspond to the same Basic Service Set Identifier (BSSID), and the access information comprises the BSSID. In this aspect, for a description of a procedure for performing wireless network handover and beneficial effects, please refer to the third aspect, and detailed description is omitted.

A tenth aspect of an embodiment of the present invention provides a wireless network, where the wireless network includes the first access device according to any one of the first aspect and the terminal device according to any one of the third aspect.

An eleventh aspect of an embodiment of the present invention provides a wireless network, where the wireless network includes a first access device, a second access device as set forth in any one of the second aspect and a terminal device as set forth in any one of the third aspect.

A twelfth aspect of the embodiments of the present application provides a computer readable storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of any one of the first to third aspects above.

Drawings

Fig. 1 is a diagram illustrating a structure of a wireless network according to an embodiment of the present application;

fig. 2 is a flowchart of steps in a method for switching a first wireless network according to an embodiment of the present application;

fig. 3 is a schematic diagram of a first application scenario provided in an embodiment of the present application;

fig. 4 is a flowchart illustrating steps of a second method for switching wireless networks according to an embodiment of the present application;

fig. 5 is a flowchart illustrating steps of a third method for wireless network handover according to an embodiment of the present application;

fig. 6 is an exemplary diagram of a second application scenario provided in an embodiment of the present application;

fig. 7 is a flowchart illustrating steps of a method for switching between wireless networks according to a fourth embodiment of the present application;

fig. 8 is a diagram illustrating a first electronic device according to an embodiment of the present application;

fig. 9 is a diagram illustrating a structure of a second electronic device according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to fall within the scope of the application.

For better understanding of the method for switching wireless networks provided by the present application, first, the structure of a wireless network 100 provided by the present application is described with reference to fig. 1, where fig. 1 is a schematic diagram of the structure of a wireless network provided by an embodiment of the present application.

The wireless network 100 shown in fig. 1 includes a plurality of access devices, for example, a first access device 101 and a second access device 102 shown in fig. 1. The wireless network 100 shown in fig. 1 is illustrated as including two access devices, and in other examples, the wireless network may include any number of access devices. Taking the first access device 101 as an example, the first access device 101 may be an AP in a wireless local area network (wireless local area network, WLAN) or a network device in a fifth generation mobile communication technology (5th generation mobile communication technology,5G) network, for example, the network device may be a transmission point (transmission reception point, TRP), a base station, a small base station device, or the like, which is not limited by the present application.

The wireless network 100 may also include at least one terminal device, such as terminal device 111 and terminal device 112 shown in fig. 1 connected to the first access device 101. A terminal device 113 connected to the second access device 102. The present embodiment is not limited to this, and the description of the number of terminal devices connected to each access device is an optional example. Taking terminal device 111 as an example, first access device 101 communicates with terminal device 111 over a wireless air interface. The terminal device 111 may be referred to as STA, access terminal, user equipment, subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, user apparatus, or the like, and is not particularly limited in the present application. The device type of the terminal device 111 may be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a wireless local loop (wireless local loop, WLL) station, a personal digital assistant (personal digital assistant, PDA), a handheld device with wireless communication functionality, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a user device in a 5G network, etc.

The wireless network 100 shown in this embodiment also includes an access controller (access controller, AC) 120. The main function of the access controller 120 is to manage and control the connected access devices. An access controller 120 shown in fig. 1 is connected to the first access device 101 and the second access device 102, and the access controller 120 is configured to manage and control the first access device 101 and the second access device 102.

Taking the first access device 101 as an example, the first access device 101 provided in this embodiment supports two or more frequency bands. For example, the first access device 101 can support both the 2.4 gigahertz (GHz) frequency band and the 5GHz frequency band. In other examples, the first access device 101 may also support any frequency band such as 6GHz, which is not limited in particular. Although the terminal device 111 can also support a plurality of frequency bands, the terminal device 111 can only access one frequency band supported by the first access device 101 at a time, that is, at the same time, the terminal device 111 can only communicate with one frequency band supported by the first access device 101, due to the volume and cost of the terminal device 111. For example, the terminal device 111 communicates with only the 2.4GHz band supported by the first access device 101 at the same time. In the case where the terminal device is close to the first access device 101, since the 5GHz band can provide a larger bandwidth for the terminal device 111, the terminal device 111 is switched from the 2.4GHz band to the 5GHz band, and the terminal device 111 can communicate with the first access device 101 in the 5GHz band.

Based on the wireless network shown in fig. 1, the method for switching wireless networks provided by the application can effectively improve the efficiency and the success rate of frequency band switching, and the specific implementation process can be shown in fig. 2, wherein fig. 2 is a step flow chart of the first method for switching wireless networks provided by the embodiment of the application.

Step 201, the first access device sets a BSSID corresponding to the first frequency band and a BSSID corresponding to the second frequency band as a target BSSID.

The first access device in this embodiment supports a first frequency band and a second frequency band, where the first frequency band is different from the second frequency band. For example, the first frequency band is the 2.4GHz band and the second frequency band is the 5GHz band. The first access device sets the identifier (basic service set identifier, BSSID) of the first frequency band corresponding to the basic service set and the BSSID corresponding to the second frequency band supported by the first access device to be the same target BSSID in order to improve the frequency band switching efficiency. It is known that the first frequency band and the second frequency band supported by the first access device both correspond to the same target BSSID.

In this embodiment, taking the example that the first access device supports two different frequency bands as an example, in other examples, the first access device may support more than two different frequency bands.

Step 202, the first access device and the terminal device access the first frequency band based on the access procedure.

In this embodiment, in the case where the first access device and the terminal device access the first frequency band, the first access device and the terminal device can communicate on the first frequency band. Specifically, the first access device and the terminal device access the first frequency band based on access procedures such as a detection procedure, an authentication procedure, an association procedure, a key interaction procedure and the like, and the specific procedures can be summarized and described as follows:

based on the probe procedure, the terminal device sends a probe request frame to the first access device. The probe request frame carries a media access control bit address (media access control address, MAC) address of the terminal device. And after receiving the detection request frame from the terminal equipment, the first access equipment returns a detection response frame to the terminal equipment. The probe response frame carries the target BSSID of the first access device and the MAC address of the first access device. Alternatively, the first access device may also directly send a beacon frame to the terminal device without receiving the probe request frame, where the beacon frame also carries the target BSSID and the MAC address of the first access device.

The terminal equipment and the first access equipment can be associated after the terminal equipment and the first access equipment confirm that the other party passes authentication based on the authentication flow. For example, the terminal device and the first access device may perform an authentication procedure based on shared key authentication (shared-key authentication).

Based on the association procedure, the terminal device sends an association request frame to the first access device, which may include various parameters of the terminal device itself, such as a rate supported by the terminal device, a coding mode, a capability of quality of service (quality of service, qoS), and the like. The first access device determines that the terminal device is allowed to associate with the first access device, i.e., the first access device allows communication between the first access device and the terminal device on the first frequency band, and the first access device sends response information to the terminal device to complete the association.

Based on the key interaction flow, the first access device and the terminal device negotiate a key for subsequent secure communication in the first frequency band and the second frequency band. It should be noted that, the description of the access procedure in this embodiment is an optional example, and is not limited, as long as the first access device can communicate with the terminal device on the first frequency band based on the access procedure.

Step 203, the first access device and the terminal device communicate on a first frequency band.

Based on the above access procedure, the terminal device and the first access device are configured to communicate on the first frequency band, and the first access device and the terminal device respectively acquire access information. The first access device and the terminal device communicate on a first frequency band based on the access information. The access information comprises encryption quintuple information, wherein the encryption quintuple information comprises an MAC address of the terminal equipment, an MAC address of first access equipment, a first random number corresponding to the first access equipment, a second random number corresponding to the terminal equipment and a secret key.

The access information shown in this embodiment further includes capability set information of the first access device. For example, the capability set information of the first access device includes at least one of the following:

the rate supported by the first access device, the coding scheme or QoS capabilities of the first access device, etc.

The following description describes a procedure in which a first access device and a terminal device communicate on a first frequency band:

the first access device is capable of acquiring access information based on the access procedure. Wherein the access information includes the encrypted quintuple information shown above.

And under the condition that the first access equipment needs to send the downlink service to the terminal equipment on the first frequency band, the first access equipment encrypts the downlink service and the first random number through a key included in the encryption quintuple to acquire downlink encryption information. And the first access device sends the downlink data frame to the MAC address of the terminal device included in the encrypted quintuple information on the first frequency band. The downstream data frame includes downstream encryption information and the target BSSID.

And after receiving the downlink data frame, the terminal equipment acquires corresponding encryption quintuple information according to the access flow between the terminal equipment and the first access equipment. The encrypted quintuple information acquired by the terminal device includes the target BSSID. And the terminal equipment decrypts the downlink encryption information through a key included in the encryption quintuple information so as to acquire the first random number and the downlink service.

And under the condition that the terminal equipment determines that the first random number contained in the encrypted quintuple information stored by the terminal equipment is the same as the first random number obtained by decrypting the downlink encrypted information, the terminal equipment determines that the first frequency band is safe, and the terminal equipment can decode the downlink service.

For the process of sending the uplink service to the first access device by the terminal device in the first frequency band, please refer to the process of sending the downlink service to the terminal device by the first access device in the first frequency band, which is not described in detail.

Step 204, the first access device sends first indication information to the terminal device.

The first access device determines that the same access information is used for communication between the first access device and the terminal device in both the first frequency band and the second frequency band, and then the first access device sends first indication information to the terminal device, wherein the first indication information is used for indicating the terminal device to use the same access information for communication in both the first frequency band and the second frequency band.

In this embodiment, the execution sequence between the step 204 and the steps 201 to 203 is not limited.

Step 205, the first access device sends first handover negotiation information to the terminal device.

In this embodiment, when determining that the first access device and the terminal device need to be switched from the first frequency band to the second frequency band, the first access device sends the first switching negotiation information to the terminal device, so that the first access device and the terminal device communicate on the second frequency band. The first switching negotiation information is used for indicating the terminal equipment to switch from the first frequency band to the second frequency band. The following illustrates alternative ways for the first access device to determine that the first access device and the terminal device need to switch from the first frequency band to the second frequency band:

Alternative 1

When the first access device detects that the first frequency band and the second frequency band meet the first condition, the first access device determines that the first access device and the terminal device need to be switched from the first frequency band to the second frequency band. The first condition includes that a target parameter of the first frequency band is smaller than a target parameter of the second frequency band, wherein the target parameter is at least one of the following:

received signal strength indication (receiving signal strength indicator, RSSI), channel quality, transmission rate, reference signal received power (reference signal receiving power, RSRP), reference signal received quality (reference signal receiving quality, RSRQ) or signal-to-interference plus noise ratio (signal to interference plus noise ratio, SINR).

It is known that when the first access device determines that the first frequency band and the second frequency band meet the first condition, the first access device determines that the first access device and the terminal device switch to the second frequency band to communicate on the second frequency band. The first access device and the terminal device communicate in the second frequency band to achieve better communication quality than in the first frequency band.

Alternative 2

When the first access device detects that the first frequency band meets the second condition, the first access device determines that the first access device and the terminal device need to be switched from the first frequency band to the second frequency band. The second condition includes that a target parameter of the first frequency band is smaller than or equal to a switching threshold, wherein the target parameter is at least one of the following:

RSSI, channel quality, transmission rate, RSRP, RSRQ, or SINR.

In this embodiment, the size of the switching threshold is not limited, and in the case where the target parameter of the first frequency band is less than or equal to the switching threshold, the communication quality between the first access device and the terminal device cannot be guaranteed in the first frequency band. For this purpose, the first access device determines that the first access device and the terminal device need to be switched from the first frequency band to the second frequency band if the first frequency band satisfies the second condition.

Step 206, the terminal device sends the first handover confirmation information to the first access device.

And under the condition that the terminal equipment receives the first switching negotiation information from the first access equipment, the terminal equipment determines that the first access equipment indicates the terminal equipment and switches from the first frequency band to the second frequency band. And the terminal equipment sends the first switching confirmation information to the first access equipment under the condition that the terminal equipment determines that the terminal equipment supports the second frequency band. The first switching confirmation information is used for confirming that the terminal equipment is switched from the first frequency band to the second frequency band.

Step 207, the first access device and the terminal device communicate over a second frequency band.

And under the condition that the first access equipment and the terminal equipment determine that the first frequency band is required to be switched to the second frequency band, the first access equipment and the terminal equipment map the service to be transmitted to the second frequency band by using the access information shown above for communication. In this embodiment, when the first access device and the terminal device need to switch from the first frequency band to the second frequency band, the first access device and the terminal device do not need to be on-line and off-line in the first frequency band. The first access device and the terminal device do not need to access to the second frequency band based on the access flow. That is, the first access device and the terminal device shown in this embodiment perform the access procedure only once, so that the first access device and the terminal device can communicate on the first frequency band and also can communicate on the second frequency band.

Specifically, on the first access device side, when the first access device receives the first handover confirmation information, the first access device does not need to execute the access procedure again, but obtains the access information of the target BSSID including the second frequency band. The first access device determines access information including a target BSSID for the second frequency band, and is also capable of being used for communication in the second frequency band. On the terminal device side, when the terminal device determines that the terminal device needs to be switched from the first frequency band to the second frequency band, the terminal device does not need to execute the access procedure again, but acquires the access information comprising the target BSSID. The terminal device determines access information including the target BSSID, and is also capable of being used for communication in the second frequency band.

The first access device and the terminal device refer to the process of the first access device and the terminal device communicating on the second frequency band based on the access information, and the process of the first access device and the terminal device communicating on the first frequency band based on the access information is not described in detail.

For better understanding of the method shown in the present embodiment, the following description is made with reference to an example shown in fig. 3, where fig. 3 is a first application scenario example diagram provided in the embodiment of the present application.

In the application scenario shown in fig. 3, if a terminal device enters the coverage area 300 of the first access device 301, the terminal device accesses the first access device 301 to communicate with the first access device 301. The application scenario takes the first frequency band as a 5GHz frequency band and the second frequency band as a 2.4GHz frequency band as an example. For example, when the terminal device is located at the location 311, the location 311 is closer to the first access device 301, and because the 5GHz band has a larger bandwidth, the terminal device located at the location 311 has better communication quality with the first access device in the 5GHz band. Therefore, based on the access procedure, the terminal device located in the position 311 and the first access device 301, the first access device 301 and the terminal device communicate in the 5GHz band, and the specific process is shown in steps 201 to 203, which is not described in detail.

The terminal device located at location 311 moves to location 312. Location 312 is a greater distance from first access device 301 than location 311 is from first access device 301. The 5GHz band may quickly attenuate signals during the process of moving the terminal device to the location 312, so that the 5GHz band may not provide enough bandwidth for the first access device 301 and the terminal device, and the communication quality between the first access device 301 and the terminal device located at the location 312 may not be guaranteed. For this purpose, the first access device 301 determines that the terminal device located at location 312 needs to be switched from the 5GHz band to the 2.4GHz band. The communication quality between the first access device 301 and the terminal device located at the position 312 can be ensured through the 2.4GHz band. The first access device 301 determines that the terminal device located at the position 312 needs to be switched from the 5GHz band to the 2.4GHz band according to the procedure shown in step 204 to step 207, which is not described in detail.

It can be seen that, in this example, in the process of switching the terminal device and the first access device 301 located in the position 312 from the 5GHz band to the 2.4GHz band, the terminal device and the first access device 301 do not need to perform the offline process in the 5GHz band, and do not need to perform the access procedure in the 2.4GHz band. The terminal device and the first access device 301 can communicate directly on the 2.4GHz band according to the access information including the target BSSID.

By adopting the method in this embodiment, the first access device and the terminal device do not need to execute the offline process in the first frequency band and do not need to execute the access process in the second frequency band in the frequency band switching process, so that the efficiency of frequency band switching is effectively improved. In addition, signaling interacted by the first access equipment and the terminal equipment in the frequency band switching process is reduced, the cost of the first access equipment and the terminal equipment is reduced, and the success rate of frequency band switching is improved. Under the condition of improving the frequency band switching efficiency, the time delay of switching the first access equipment and the terminal equipment from the first frequency band to the second frequency band is effectively reduced, and the interruption time of the service interacted by the first access equipment and the terminal equipment is reduced. According to the method, the first access device and the terminal device do not need to be provided with independent hardware systems for the first frequency band and the second frequency band respectively, namely, according to the method, the first access device and the terminal device can communicate with the first frequency band and the second frequency band through the same hardware system respectively, and therefore hardware cost of the first access device and the terminal device is reduced.

In the embodiment shown in fig. 2, the first access device determines whether the first access device and the terminal device need to switch from the first frequency band to the second frequency band for communication. In this embodiment, the terminal device may determine whether the first access device and the terminal device need to switch from the first frequency band to the second frequency band for communication. Fig. 4 is a flowchart of a second method for wireless network handover according to an embodiment of the present application.

In step 401, the first access device sets a BSSID corresponding to the first frequency band and a BSSID corresponding to the second frequency band as a target BSSID.

Step 402, the first access device and the terminal device access the first frequency band based on the access procedure.

Step 403, the first access device and the terminal device communicate on a first frequency band.

Step 404, the first access device sends first indication information to the terminal device.

For the description of the execution process of steps 401 to 404 in this embodiment, please refer to the description of the execution process of steps 201 to 204 corresponding to fig. 2, and detailed description thereof will be omitted.

Step 405, the terminal device sends second handover negotiation information to the first access device.

And the terminal equipment sends the second switching negotiation information to the first access equipment under the condition that the first access equipment and the terminal equipment are determined to need to be switched from the first frequency band to the second frequency band so that the first access equipment and the terminal equipment communicate on the second frequency band. The second handover negotiation information is used to request a handover from the first frequency band to the second frequency band. For a description of the procedure of determining that the terminal device needs to switch from the first frequency band to the second frequency band, please refer to the first access device shown in step 205 corresponding to fig. 2, which is not described in detail.

Step 406, the first access device sends second handover confirmation information to the terminal device.

And under the condition that the first access device receives the second switching negotiation information from the terminal device, the first access device determines that the terminal device indicates the first access device to switch from the first frequency band to the second frequency band. And the first access equipment sends second switching confirmation information to the terminal equipment under the condition that the first access equipment determines that the first access equipment supports the second frequency band. The second switching confirmation information is used for confirming switching from the first frequency band to the second frequency band.

Step 407, the first access device and the terminal device communicate over a second frequency band.

In the execution of step 407 shown in the present embodiment, please refer to step 207 corresponding to fig. 2, and detailed description is omitted.

By adopting the method shown in the embodiment, the terminal equipment is responsible for determining whether the first access equipment and the terminal equipment need to be switched from the first frequency band to the second frequency band, so that the overhead of the first access equipment for determining whether the first access equipment needs to be switched from the first frequency band to the second frequency band is reduced.

The embodiment of the application also provides a method for switching the wireless network as shown in fig. 5. Fig. 5 is a flowchart of steps of a third method for switching wireless networks according to an embodiment of the present application. The embodiment shown in fig. 5 differs from the above-described method embodiment in that the first frequency band and the second frequency band are frequency bands supported by two different access devices.

Step 501, the first access device and the terminal device access the first frequency band based on the access procedure.

In the execution of step 501 shown in this embodiment, please refer to step 202 corresponding to fig. 2, which is not described in detail.

Step 502, the first access device sends a target BSSID to the second access device.

The first access device may send the target BSSID to the second access device via a medium such as an optical fiber, a network cable, or an air interface. Or the access controller acquires the target BSSID from the first access device, and then the access controller sends the target BSSID to the second access device.

The execution timing between step 501 and step 502 is not limited in this embodiment.

In step 503, the second access device sets the BSSID corresponding to the second frequency band as the target BSSID.

It can be known that the BSSID corresponding to the second frequency band of the second access device is the same as the BSSID corresponding to the first frequency band of the first access device, and both are target BSSIDs. And under the condition that the BSSID corresponding to the second frequency band of the second access device is the same as the BSSID corresponding to the first frequency band of the first access device, the access information used by the second access device and the terminal device on the second frequency band is the same as the access information used by the first access device and the terminal device on the first frequency band. The first frequency band shown in the embodiment is different from the second frequency band, and the detailed description is referred to the description of the embodiment corresponding to fig. 2, which is not repeated.

Step 504, the first access device and the terminal device communicate over a first frequency band.

In the execution of step 504 shown in this embodiment, please refer to step 203 corresponding to fig. 2, which is not described in detail.

The execution timing between step 503 and step 504 is not limited in this embodiment.

Step 505, the first access device sends access information to the second access device.

In this embodiment, when the first access device and the terminal device normally communicate on the first frequency band, the first access device sends access information to the second access device. It can be seen that the first access device may send the access information to the second access device before the terminal device switches from the first frequency band of the first access device to the second frequency band of the second access device. For the description of the access information, please refer to the description of step 202 corresponding to fig. 2, which is not repeated.

In this embodiment, the first access device may send the access information directly to the second access device, or the access controller forwards the access information from the first access device to the second access device.

Step 506, the second access device sends the second indication information to the terminal device.

The second access device determines that the same access information is used for communication between the second access device and the terminal device in both the first frequency band and the second frequency band, and then the second access device sends second indication information to the terminal device, wherein the second indication information is used for indicating the terminal device to use the same access information for communication in both the first frequency band and the second frequency band.

It should be clear that, in this embodiment, the first access device may also send the first indication information to the terminal device to indicate that the terminal device uses the same access information to communicate on the first frequency band and the second frequency band, and the process of sending the first indication information to the terminal device by the first access device may be referred to as step 204 corresponding to fig. 2, which is not described in detail.

The execution timing between step 505 and step 506 is not limited in this embodiment.

Step 507, the first access device sends first handover negotiation information to the terminal device.

Step 508, the terminal device sends the first handover confirmation information to the first access device.

For the description of the execution process of steps 507 to 508 in this embodiment, please refer to steps 205 to 206 corresponding to fig. 2, which is not described in detail.

Step 509, the first access device sends communication indication information to the second access device.

In this embodiment, according to the difference of the required frequency band switching conditions, the content indicated by the communication indication information sent by the first access device to the second access device will be different.

For example, the first access device determines, based on option 1, that the terminal device needs to switch from a first frequency band of the first access device to a second frequency band of the second access device for communication. The process of alternative 1 may be shown in step 205 corresponding to fig. 2, and the detailed process will not be described again. The communication indication information shown in this example indicates a second frequency band (e.g., 5GHz band) to the second access device. The second access device determines, based on the communication indication information, that the terminal device switches to a second frequency band supported by the second access device.

For another example, when the first access device determines, based on the alternative 2, that the communication quality of the terminal device cannot be guaranteed in the first frequency band, in order to guarantee the communication quality of the terminal device, the terminal device that has been accessed to the first frequency band needs to perform frequency band switching. The communication instruction information shown in this example is used to instruct the terminal device that the frequency band switching is required. And under the condition that the second access equipment receives the communication indication information, the second frequency band can be determined according to specific conditions. For example, if the second access device determines that the distance between the terminal device and the second access device is relatively close, the second access device may determine that the terminal device switches to the 5GHz band supported by the second access device. If the second access device determines that the distance between the terminal device and the second access device is far, the second access device may determine that the terminal device is switched to the 2.4GHz band supported by the second access device.

In this embodiment, the first access device may directly send the communication indication information to the second access device, or the access controller forwards the communication indication information from the first access device to the second access device.

The present embodiment is exemplified by taking the example that the first access device is responsible for determining whether the terminal device needs to switch the frequency band. In other examples, the access controller may also determine whether the terminal device requires a band switch, and the second access device shown in this example receives communication indication information from the access controller. As another example, the terminal device may also determine whether the terminal device requires a frequency band switch. The second access device shown in this example receives communication instruction information from the terminal device.

Step 510, the second access device and the terminal device communicate over a second frequency band.

The second access device determines, according to the communication indication information, that the terminal device needs to be switched to a second frequency band supported by the second access device, and then the second access device and the terminal device use the above-mentioned access information to communicate in the second frequency band, and a specific communication process can refer to a process of the first access device and the terminal device communicating in the second frequency band, which is shown in step 207 corresponding to fig. 2, and is not described in detail.

For better understanding of the method shown in the present embodiment, the following description is made with reference to an application scenario shown in fig. 6, where fig. 6 is a second exemplary diagram of an application scenario provided in the embodiment of the present application.

In the application scenario shown in fig. 6, if a terminal device enters the coverage area 611 of the first access device 601, the terminal device accesses the first frequency band of the first access device 601 to communicate with the terminal device. The present application scenario takes a first frequency band as a 5GHz frequency band supported by the first access device 601, and a second frequency band as a 2.4GHz frequency band supported by the second access device 602 as an example. When the terminal device is located at location 621, the terminal device communicates with the first access device 601 over the 5GHz band supported by the first access device 601. The specific process is shown in step 501, and details are not described in detail.

The terminal device at location 621 moves to location 622. Location 622 is located within the coverage area 612 of the second access device 602. In order to ensure the communication quality of the terminal device, the terminal device switches from the first frequency band of the first access device 601 to the second frequency band of the second access device 602 for communication, and the specific process is shown in steps 502 to 510.

It can be seen that, when the terminal device leaves the coverage area 611 of the first access device 601 and enters the coverage area 612 of the second access device 602, the terminal device and the second access device 602 can be directly switched to the second frequency band for communication, and the terminal device and the second access device 602 can be ensured to be directly switched to the second frequency band without performing the procedure of connecting to the first frequency band or the procedure of connecting to the second frequency band. The quality of the communication between the terminal device and the second access device 602 is effectively ensured.

By adopting the method in the embodiment, the first access device and the terminal device do not need to execute the offline process in the first frequency band and do not need to execute the access flow of the second access device and the terminal device in the second frequency band in the frequency band switching process, so that the efficiency of frequency band switching between different access devices is effectively improved. And the signaling interacted by the second access equipment and the terminal equipment in the frequency band switching process is reduced, the expenditure of the second access equipment and the terminal equipment is reduced, and the success rate of frequency band switching is improved. Under the condition of improving the frequency band switching efficiency, the time delay of switching the second access equipment and the terminal equipment to the second frequency band is effectively reduced, and the interruption time of the service interacted by the second access equipment and the terminal equipment is reduced.

The embodiment of the application also provides a method for switching the wireless network as shown in fig. 7. Fig. 7 is a flowchart of steps of a fourth method for switching wireless networks according to an embodiment of the present application. The embodiment shown in fig. 7 differs from the embodiment shown in fig. 5 in that the timing at which the second access device acquires the access information is different.

Step 701, the first access device and the terminal device access the first frequency band based on the access procedure.

Step 702, the first access device sends a target BSSID to the second access device.

In step 703, the second access device sets the BSSID corresponding to the second frequency band as the target BSSID.

Step 704, the first access device and the terminal device communicate over a first frequency band.

In the execution of steps 701 to 704 in this embodiment, please refer to steps 501 to 504 corresponding to fig. 5, which are not described in detail.

Step 705, the second access device sends second indication information to the terminal device.

In the execution of step 705 shown in the present embodiment, please refer to step 506 corresponding to fig. 5, and detailed description is omitted.

Step 706, the first access device sends first handover negotiation information to the terminal device.

Step 707, the terminal device sends the first handover confirmation information to the first access device.

Step 708, the first access device sends communication indication information to the second access device.

In the execution of steps 706 to 708 in this embodiment, please refer to steps 507 to 509 corresponding to fig. 5, which are not described in detail.

Step 709, the first access device sends access information to the second access device.

In this embodiment, as shown in steps 705 to 706, the first access device determines that the terminal device needs to communicate with the second access device, and thus, the first access device sends the access information to the second access device.

The execution timing between step 708 and step 709 is not limited in this embodiment.

Step 710, the second access device and the terminal device communicate over a second frequency band.

For a description of the execution process of step 710 in this embodiment, please refer to step 510 corresponding to fig. 5, which is not repeated.

The embodiment of the application provides electronic equipment. The structure of the electronic device may be shown in fig. 8, where fig. 8 is a structural example diagram of a first electronic device according to an embodiment of the present application.

The electronic device 800 shown in this embodiment comprises a processor 801, a memory 802 and a transceiver 803. The processor 801 is connected to the memory 802 and the transceiver 803, respectively. The processor 801 may include at least one of an application processor (application processor, AP), a modem processor, a graphics processor (graphics processingunit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, or a neural network processor (neural-network processing unit, NPU). The transceiver 803 receives electromagnetic waves, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 801. The transceiver 803 may also receive a signal to be transmitted from the processor 801, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation. Memory 802 stores program instructions.

If the electronic device 800 in this embodiment is a first access device, the program instructions stored in the memory 802, when executed by the processor 801, cause the first access device to perform the process of any one of the method embodiments in fig. 2, fig. 4, fig. 5 or fig. 7. If the electronic device 800 in this embodiment is a second access device, the program instructions stored in the memory 802, when executed by the processor 801, cause the second access device to perform the process of any of the method embodiments of fig. 5 or fig. 7. If the electronic device 800 in this embodiment is a terminal device, the program instructions stored in the memory 802, when executed by the processor 801, cause the terminal device to perform the process of any one of the method embodiments in fig. 2, fig. 4, fig. 5 or fig. 7.

The present embodiment also provides an electronic apparatus as shown in fig. 9, and fig. 9 illustrates the structure of the electronic apparatus from the viewpoint of functional modules. Fig. 9 is a schematic diagram of a second electronic device according to an embodiment of the present application.

The electronic device 900 shown in the present embodiment includes a transceiver module 901 and a processing module 902 connected to the transceiver module 901. If the electronic device 900 shown in the present embodiment is a first access device, the transceiver module 901 is configured to perform the steps related to the transceiving performed by the first access device in any of the method embodiments of fig. 2, fig. 4, fig. 5 or fig. 7. The processing module 902 is configured to perform the processing-related steps performed by the first access device in any of the method embodiments of fig. 2, fig. 4, fig. 5, or fig. 7. If the electronic device 900 shown in the present embodiment is a second access device, the transceiver module 901 is configured to perform the steps related to the transceiving performed by the second access device in any of the method embodiments in fig. 5 or fig. 7. The processing module 902 is configured to perform the processing-related steps performed by the second access device in any of the method embodiments of fig. 5 or fig. 7. If the electronic device 900 in this embodiment is a terminal device, the transceiver module 901 is configured to execute steps related to the transceiver performed by the terminal device in any one of the method embodiments in fig. 2, fig. 4, fig. 5 or fig. 7. The processing module 902 is configured to perform the processing-related steps performed by the terminal device in any of the method embodiments of fig. 2, fig. 4, fig. 5 or fig. 7.

Embodiments of the present application also provide a computer readable storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method shown in any of the method embodiments of fig. 2, fig. 4, fig. 5 or fig. 7.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of wireless network handover, the method comprising:

the first access equipment communicates with the terminal equipment on a first frequency band according to the access information;

when the first access device determines that the terminal device needs frequency band switching, the first access device communicates with the terminal device on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

2. The method of claim 1, wherein the first access device is further configured to, prior to communicating with the terminal device on the first frequency band based on the access information:

and the first access device sets the BSSID corresponding to the first frequency band and the BSSID corresponding to the second frequency band as the BSSID.

3. The method according to claim 1 or 2, wherein the first access device is further adapted to:

the first access device sends first switching negotiation information to the terminal device, wherein the first switching negotiation information is used for indicating the terminal device to switch from the first frequency band to the second frequency band;

the first access device receives first switching confirmation information from the terminal device, wherein the first switching confirmation information is used for confirming that the terminal device is switched from the first frequency band to the second frequency band.

4. The method according to claim 1 or 2, wherein the first access device is further adapted to:

The first access device receives second switching negotiation information from the terminal device, wherein the second switching negotiation information is used for requesting to switch from the first frequency band to the second frequency band;

and the first access equipment sends second switching confirmation information to the terminal equipment, wherein the second switching confirmation information is used for confirming switching from the first frequency band to the second frequency band.

5. The method according to any of claims 1 to 4, wherein the first access device is further adapted to:

the first access device sends first indication information to the terminal device, wherein the first indication information is used for indicating the terminal device to communicate with the first access device on the second frequency band by using the access information.

6. The method according to any one of claims 1 to 5, wherein the terminal device needs to switch the frequency band when the first frequency band and the second frequency band meet a first condition, the first condition including that a target parameter of the first frequency band is smaller than a target parameter of the second frequency band, wherein the target parameter is at least one of:

7. The method according to any one of claims 1 to 5, wherein the terminal device needs to switch the frequency band when the first frequency band meets a second condition, where the second condition includes a target parameter of the first frequency band being less than or equal to a switching threshold, where the target parameter is at least one of:

8. A method of wireless network handover, the method comprising:

the second access equipment acquires access information, wherein the access information is used for the first access equipment to communicate with the terminal equipment on a first frequency band;

When the second access device determines that the terminal device needs to communicate with the second access device, the second access device communicates with the terminal device on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

9. The method of claim 8, wherein the second access device communicating with the terminal device on a second frequency band according to the access information comprises:

the second access device receives the access information from the first access device before the second access device determines that the terminal device needs to communicate with the second access device;

and the second access equipment communicates with the terminal equipment on a second frequency band according to the access information.

10. The method of claim 8, wherein the second access device communicating with the terminal device on a second frequency band according to the access information comprises:

after the second access device determines that the terminal device needs to communicate with the second access device, the second access device receives the access information from the first access device;

11. The method according to any of claims 8 to 10, wherein the second access device is further arranged to, prior to communicating with the terminal device on a second frequency band according to the access information:

the second access device receives communication indication information, where the communication indication information is used to indicate that the terminal device needs to communicate with the second access device on a second frequency band.

12. The method according to any of claims 8 to 11, wherein the second access device is further arranged to, prior to communicating with the terminal device on a second frequency band according to the access information:

the second access device sends second indication information to the terminal device, wherein the second indication information is used for indicating the terminal device to communicate with the second access device on the second frequency band by using the access information.

13. A method of wireless network handover, the method comprising:

the terminal equipment communicates with the first access equipment on the first frequency band according to the access information;

When the terminal equipment determines that the frequency band switching is needed, the terminal equipment communicates with a target access equipment on a second frequency band according to the access information, wherein the target access equipment is the first access equipment or the second access equipment, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

14. The method of claim 13, wherein the target access device is the first access device, and wherein the terminal device is configured to, prior to communicating with the target access device on the second frequency band based on the access information, the method further comprising:

the terminal equipment receives first switching negotiation information from the first access equipment, wherein the first switching negotiation information is used for indicating the terminal equipment to switch from the first frequency band to the second frequency band;

the terminal equipment sends first switching confirmation information to the first access equipment, wherein the first switching confirmation information is used for confirming that the terminal equipment is switched from the first frequency band to the second frequency band.

15. The method of claim 13, wherein the target access device is the first access device, and wherein the terminal device is configured to, prior to communicating with the target access device on the second frequency band based on the access information, the method further comprising:

The terminal equipment sends second switching negotiation information to the first access equipment, wherein the second switching negotiation information is used for the terminal equipment to request switching from the first frequency band to the second frequency band;

the terminal equipment receives second switching confirmation information from the first access equipment, wherein the second switching confirmation information is used for confirming that the terminal equipment is switched from the first frequency band to the second frequency band.

16. The method of claim 13, wherein the target access device is the second access device, and wherein the terminal device is configured to, prior to communicating with the target access device on the second frequency band based on the access information, the method further comprises:

the terminal device sends communication indication information to the second access device, wherein the communication indication information is used for indicating that the terminal device which is in communication with the first access device needs to be in communication with the second access device on a second frequency band.

17. The method according to any of claims 13 to 15, wherein the target access device is the first access device, and wherein the terminal device is further configured to:

The terminal device receives first indication information from the first access device, wherein the first indication information is used for indicating the terminal device to communicate with the first access device on the second frequency band by using the access information.

18. The method according to claim 13 or 16, wherein the target access device is the second access device, and wherein the terminal device is further configured to:

the terminal device receives second indication information from the second access device, where the second indication information is used to instruct the terminal device to use the access information to communicate with the second access device on the second frequency band.

19. An access device comprising a processor, a memory, and a transceiver; the processor is respectively connected with the memory and the transceiver;

the processor is used for controlling the transceiver to communicate with the terminal equipment on the first frequency band according to the access information;

when the processor determines that the terminal equipment needs frequency band switching, the processor is used for controlling the transceiver to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

20. An access device comprising a processor, a memory, and a transceiver; the processor is respectively connected with the memory and the transceiver;

the processor is used for acquiring access information, and the access information is used for the communication of another access device with the terminal device on the first frequency band;

when the processor determines that the terminal equipment needs to communicate with the access equipment, the processor is used for controlling the transceiver to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

21. A terminal device comprising a processor, a memory and a transceiver; the processor is respectively connected with the memory and the transceiver;

the processor is used for controlling the transceiver to communicate with the first access equipment on the first frequency band according to the access information;

when the processor determines that the frequency band is required to be switched, the processor controls the transceiver to communicate with a target access device on a second frequency band according to the access information, wherein the target access device is the first access device or the second access device, the first frequency band and the second frequency band both correspond to the same Basic Service Set Identifier (BSSID), and the access information comprises the BSSID.

22. An access device, comprising a transceiver module and a processing module;

the processing module is used for controlling the transceiver module to communicate with the terminal equipment on the first frequency band according to the access information;

when the processing module determines that the terminal equipment needs frequency band switching, the processing module controls the receiving and transmitting module to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

23. An access device, comprising a transceiver module and a processing module;

the processing module is used for acquiring access information, wherein the access information is used for the communication of another access device with the terminal device on a first frequency band;

when the processing module determines that the terminal equipment needs to communicate with the second access equipment, the processing module controls the transceiver module to communicate with the terminal equipment on a second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

24. A terminal device, characterized in that the terminal device comprises a transceiver module and a processing module;

the processing module is used for controlling the transceiver module to communicate with the first access equipment on the first frequency band according to the access information;

when the processing module determines that the frequency band is required to be switched, the processing module controls the receiving-transmitting module to communicate with a target access device on a second frequency band according to the access information, wherein the target access device is the first access device or the second access device, the first frequency band and the second frequency band both correspond to the same Basic Service Set Identifier (BSSID), and the access information comprises the BSSID.

25. A wireless network comprising a first access device and a terminal device;

the first access equipment is used for communicating with the terminal equipment on a first frequency band according to access information;

the terminal equipment is used for communicating with the first access equipment on the first frequency band according to access information;

when the first access device determines that the terminal device needs frequency band switching, the first access device is used for communicating with the terminal device on a second frequency band according to the access information;

When the terminal equipment determines that the frequency band needs to be switched, the terminal equipment is used for communicating with the first access equipment on the second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

26. A wireless network comprising a first access device, a second access device and a terminal device;

the second access device obtains access information, wherein the access information is used for the first access device to communicate with the terminal device on a first frequency band;

the terminal equipment is used for communicating with the first access equipment on the first frequency band according to the access information;

when the second access device determines that the terminal device needs to communicate with the second access device, the second access device communicates with the terminal device on a second frequency band according to the access information;

when the terminal equipment determines that the frequency band needs to be switched, the terminal equipment is used for communicating with the second access equipment on the second frequency band according to the access information, the first frequency band and the second frequency band both correspond to the same basic service set identifier BSSID, and the access information comprises the BSSID.

27. A computer readable storage medium storing a computer program comprising program instructions which, when executed by a processor, cause the processor to perform the method of any one of claims 1 to 18.