CN112188581A

CN112188581A - Wireless access point switching processing method, device, medium and equipment

Info

Publication number: CN112188581A
Application number: CN202010943672.1A
Authority: CN
Inventors: 黄岁世
Original assignee: Ruijie Networks Co Ltd
Current assignee: Ruijie Networks Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-01-05
Anticipated expiration: 2040-09-09
Also published as: CN112188581B

Abstract

The invention relates to a wireless access point switching processing method, a wireless access point switching processing device, a wireless access point switching processing medium and wireless access point switching processing equipment. In the scheme provided by the embodiment of the invention, each wireless access point does not need to report signal strength information, the access controller determines whether the wireless access point needs to be switched, but the signal strength information can be broadcasted through the beacon frame, so that the signal strength information obtained by the first wireless access point associated with the wireless terminal is published, each second wireless access point unassociated with the wireless terminal determines whether the wireless access point accessed by the wireless terminal needs to be switched to the second wireless access point according to the beacon frame broadcast, and the access controller is informed to switch the wireless access point through the switching request message. By realizing the switching decision of the wireless access points by each second wireless access point, the timeliness of the AP switching decision is ensured, more bandwidth of a CAPWAP control channel is not occupied, and the CPU processing load of the AC is not increased.

Description

Wireless access point switching processing method, device, medium and equipment

Technical Field

The present invention relates to the field of wireless technologies, and in particular, to a method, an apparatus, a medium, and a device for processing a handover of a wireless access point.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.

At present, there are two main wireless local area network (wlan) networking schemes, one is a traditional inter-frequency micro-cellular networking scheme, and the other is a co-frequency networking scheme called fourth generation wlan architecture.

The same-frequency networking deploys the network by using a single channel, and zero roaming can be really realized through the same-frequency networking technology. By the deployment of the multilayer independent same-frequency network, high-density deployment can be realized, and the deployment and maintenance are simplified.

According to the realization mode of the existing same-frequency networking, the method can be divided into virtual cellular same-frequency networking and virtual port same-frequency networking.

The main idea of the virtual cellular common-frequency networking is to let a designated wireless Access Point (AP) in the network send out the same Service Set Identifier (SSID) and simultaneously send out the same Basic Service Set Identifier (BSSID). Thus, for a terminal (which may be referred to as a wireless terminal, STA) connected to a wireless network, all physical APs (real APs) in the network that send out the same SSID signal can be regarded as a "virtual AP".

A "virtual AP" may contain hundreds or even thousands of physical APs, thus covering a large area, e.g., a ward, a dormitory, etc. When a STA moves within the coverage area of a "virtual AP", it can be considered that the STA is always associated with the "virtual AP" and there is no roaming behavior. In practice, the STA may operate on a physical AP of a different station.

A schematic diagram of virtual cellular on-channel networking may be as shown in fig. 1. As shown in fig. 1, in the virtual cellular same-frequency networking mode, three APs (which may be respectively denoted as APs 1-3) send out the same BSSID (which may be all a) through the same Channel (which may be denoted as Channel1) to provide a wireless access service to the STA.

In the virtual cellular same-frequency networking mode, because BSSIDs sent by APs are the same, an STA may receive Beacon (Beacon) messages of the same BSSID sent by different APs in a network at the same time, which causes the signal strength of multiple "same" Beacon messages received by a terminal to be inconsistent, thereby causing a series of reactions such as disconnection, re-association, and the like. Therefore, the same-frequency networking mode of the virtual ports is generated.

In the same-frequency networking mode of the virtual port, an individual BSSID is provided for each STA in a network associated with the same-frequency networking, and an individual virtual-port (VP) of a Basic Service Set (BSS) is provided for each STA. Therefore, the problem that multiple APs send Beacon messages with the same BSSID in a virtual cellular same-frequency networking mode is solved.

A schematic diagram of virtual port on-channel networking may be as shown in fig. 2. As shown in fig. 2, in the virtual port co-frequency networking mode, two APs (which may be respectively denoted as APs 1-2) send out different BSSIDs (which may be respectively denoted as BSSIDs 1-3) through the same Channel (which may be denoted as Channel1), and respectively provide wireless access services to different STAs (which may be respectively denoted as STAs 1-3).

Under the same-frequency networking mode of the virtual ports, similar to the same-frequency networking mode of virtual cells, multiple physical APs in the network are virtualized into a large virtual AP. For the STA side, in the process that the STA moves in the coverage area of one "virtual AP", the STA can be considered to be always associated with the same AP without roaming, and the effect of "zero roaming" is achieved.

In the same-frequency networking scheme, no matter in a virtual cellular same-frequency networking mode or a virtual port same-frequency networking mode, an STA is actually associated with which physical AP, and a decision is made by an Access Controller (AC) according to factors such as signal strength (RSSI) of the STA on each physical AP. The RSSI of the STA on each physical AP is determined by each AP and then sent to the AC via a control and configuration protocol (CAPWAP) control path of the wireless access point.

If the frequency of the AP sending the signal strength data is low, the AP switching decision of the STA by the AC is not timely, and the STA continuously loses packets, even drops the line. On the other hand, if the frequency of the AP sending the signal strength data is high, the AP occupies more bandwidth of the CAPWAP control channel, and the CPU processing load of the AC is likely to be large.

Disclosure of Invention

The embodiment of the invention provides a wireless access point switching processing method, a wireless access point switching processing device, a wireless access point switching processing medium and wireless access point switching processing equipment, which are used for solving the problems that an AP switching decision is not timely, or more bandwidths of CAPWAP control channels are occupied, and the CPU processing load of an AC is large.

In a first aspect, the present invention provides a method for processing wireless access point handover, where the method is applied in a first wireless access point, and the first wireless access point is a wireless access point associated with a wireless terminal in a network of a same-frequency networking, and the method includes:

the first wireless access point monitors first signal strength of the wireless terminal;

the first wireless access point carries the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and broadcasts by using the beacon frame;

and when the switching decision is determined to be executed, sending a switching request message to an access controller through a control and configuration protocol control channel of the wireless access point to request the access controller to execute the switching decision, wherein the second wireless access point is a wireless access point which is not associated with the wireless terminal in the network of the same-frequency networking, and the switching decision refers to switching the wireless access point which is associated with the wireless terminal from the first wireless access point to the second wireless access point.

Optionally, the carrying, by the first radio access point, the monitored first signal strength in a beacon frame corresponding to the radio terminal includes:

and the first wireless access point carries the monitored first signal strength in a beacon frame custom information element field corresponding to the wireless terminal.

the first wireless access point carries the monitored first signal strength, the physical address of the wireless terminal and the physical address of the first wireless access point in a beacon frame corresponding to the wireless terminal.

In a second aspect, the present invention further provides a method for processing wireless access point handover, where the method is applied to a second wireless access point, and the second wireless access point is a wireless access point which is not associated with a wireless terminal in a network with same frequency networking, and the method includes:

the second wireless access point receives a beacon frame corresponding to the wireless terminal, wherein the beacon frame is broadcast by a first wireless access point corresponding to the wireless terminal, the first wireless access point is a wireless access point associated with the wireless terminal in the network of the same-frequency networking, and the beacon frame carries a first signal intensity of the wireless terminal monitored by the first wireless access point;

and the second wireless access point determines whether to execute a switching decision according to the determined second signal strength of the wireless terminal and the first signal strength carried in the beacon frame, and sends a switching request message to an access controller through a control and configuration protocol control access of the wireless access point to request the access controller to execute the switching decision when determining to execute the switching decision, wherein the switching decision refers to the fact that the wireless access point associated with the wireless terminal needs to be switched from the first wireless access point to the second wireless access point.

Optionally, the determining, by the second wireless access point, whether to execute a handover decision according to the determined second signal strength of the wireless terminal and the first signal strength carried in the beacon frame includes:

when the second wireless access point determines the second signal strength of the wireless terminal each time, determining whether to execute a switching decision according to the determined second signal strength of the wireless terminal and the first signal strength carried in the beacon frame received last time; and/or;

and when the second wireless access point receives the beacon frame every time, determining whether to execute a switching decision according to the second signal strength of the wireless terminal determined at the latest time and the first signal strength carried in the received beacon frame.

Optionally, the beacon frame further carries a physical address of the wireless terminal and a physical address of the first wireless access point;

the handover request message carries the first signal strength carried in the beacon frame, the physical address of the wireless terminal, the physical address of the first wireless access point, the physical address of the second wireless access point, and the second signal strength of the wireless terminal determined by the second wireless access point, so that the access controller executes the handover decision according to the information carried in the handover request message.

In a third aspect, the present invention further provides a method for processing wireless access point handover, where the method is applied to an access controller in a network of a same-frequency networking, and includes:

receiving a switching request message sent by a second wireless access point corresponding to the wireless terminal through a control and configuration protocol control path of the wireless access point;

executing a switching decision corresponding to the switching request message according to the switching request message;

wherein the handover request message is a beacon frame corresponding to the wireless terminal, which is broadcast by a first wireless access point corresponding to the wireless terminal and received by a second wireless access point, and is sent when a handover decision is determined to be executed or not according to a determined second signal strength of the wireless terminal and a first signal strength carried in the beacon frame, the beacon frame carries the first signal strength of the wireless terminal monitored by the first wireless access point, the handover decision is to handover a wireless access point associated with the wireless terminal from the first wireless access point to the second wireless access point, the second wireless access point is a wireless access point not associated with the wireless terminal in the same-frequency networking network, and the first wireless access point is in the same-frequency networking network, a wireless access point with which the wireless terminal is associated.

Optionally, executing a handover decision corresponding to the handover request message according to the handover request message includes:

and executing a switching decision corresponding to the switching request message according to the switching request message by combining a wireless access point load balancing strategy and/or the number limit of the second wireless access point access wireless terminals corresponding to the switching request message.

In a fourth aspect, the present invention further provides a system for switching and processing wireless access points, where the system includes a first wireless access point corresponding to a wireless terminal in a network with same-frequency networking, at least one second wireless access point corresponding to the wireless terminal, and an access controller, the first wireless access point is a wireless access point associated with the wireless terminal in the network with same-frequency networking, and the second wireless access point is a wireless access point not associated with the wireless terminal in the network with same-frequency networking, where:

the first wireless access point is configured to monitor a first signal strength of the wireless terminal, carry the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and broadcast the beacon frame;

the second wireless access point is configured to determine whether to execute a handover decision according to the determined second signal strength of the wireless terminal and the received first signal strength carried in the beacon frame, and send a handover request packet to the access controller through a control and configuration protocol control channel of the wireless access point when determining to execute the handover decision, where the handover decision refers to that the wireless access point associated with the wireless terminal needs to be handed over from the first wireless access point to the second wireless access point;

and the access controller is used for executing the switching decision corresponding to the switching request message.

In a fifth aspect, the present invention further provides a wireless access point handover processing apparatus, applied in a first wireless access point, the apparatus includes:

the wireless terminal monitoring module is used for monitoring first signal intensity of a wireless terminal, and the first wireless access point is a wireless access point associated with the wireless terminal in a network of same-frequency networking;

the wireless terminal information release module is used for carrying the monitored first signal strength in a beacon frame corresponding to the wireless terminal and broadcasting by using the beacon frame;

In a sixth aspect, the present invention further provides a wireless access point handover processing apparatus, which is applied in a second wireless access point, and the apparatus includes:

a wireless terminal information receiving module, configured to receive a beacon frame corresponding to a wireless terminal broadcast by a first wireless access point, where the second wireless access point is a wireless access point that is not associated with the wireless terminal in a network with the same-frequency networking, the first wireless access point is a wireless access point that is associated with the wireless terminal in the network with the same-frequency networking, and the beacon frame carries a first signal strength of the wireless terminal monitored by the first wireless access point;

the wireless terminal information acquisition module is used for determining the second signal strength of the wireless terminal;

and the wireless access point switching decision module is used for determining whether to execute a switching decision according to the second signal strength of the wireless terminal determined by the wireless terminal information acquisition module and the first signal strength carried in the beacon frame received by the wireless terminal information receiving module, and when the switching decision is determined to be executed, sending a switching request message to an access controller through a control and configuration protocol control channel of the wireless access point to request the access controller to execute the switching decision, wherein the switching decision refers to the need of switching the wireless access point associated with the wireless terminal from the first wireless access point to the second wireless access point.

In a seventh aspect, the present invention further provides a wireless access point handover processing apparatus, which is applied in an access controller, and the apparatus includes:

the message receiving module is used for receiving a switching request message sent by a second wireless access point corresponding to the wireless terminal through a control and configuration protocol control path of the wireless access point;

the wireless access point switching module is used for executing a switching decision corresponding to the switching request message according to the switching request message received by the message receiving module;

In an eighth aspect, the present invention also provides a non-volatile computer storage medium storing an executable program which is executed by a processor to implement the method as described above.

In a ninth aspect, the present invention further provides a wireless access point switching processing device, including a processor, a communication interface, a memory and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus;

the memory is used for storing a computer program;

the processor, when executing the program stored in the memory, is configured to implement the method steps as described above.

According to the scheme provided by the embodiment of the invention, in a network of a same-frequency networking, a wireless access point associated with a wireless terminal (a first wireless access point corresponding to the wireless terminal) broadcasts the monitored signal strength of the wireless terminal in a beacon frame broadcasting manner, if the beacon frame is received by each wireless access point unassociated with the wireless terminal (a second wireless access point corresponding to the wireless terminal), whether the wireless terminal needs to be switched from the first wireless access point to the wireless terminal or not can be determined according to the signal strength of the wireless terminal determined by the wireless access point and the signal strength of the wireless terminal determined by the first wireless access point carried in the beacon frame, if the wireless terminal needs to be switched from the first wireless access point to the wireless terminal, a switching request message can be sent to an access controller, and the request access controller switches and associates the wireless terminal from the first wireless access point to a second wireless access point which sends the switching request message.

In the scheme provided by the embodiment of the invention, each wireless access point does not need to report signal strength information, the access controller determines whether the wireless access point needs to be switched, but the signal strength information can be broadcasted through the beacon frame, so that the signal strength information obtained by the first wireless access point associated with the wireless terminal is published, each second wireless access point unassociated with the wireless terminal determines whether the wireless access point accessed by the wireless terminal needs to be switched to the second wireless access point according to the beacon frame broadcast, and the access controller is informed to switch the wireless access point through the switching request message. By realizing the switching decision of the wireless access points by each second wireless access point, the timeliness of the AP switching decision is ensured, more bandwidth of a CAPWAP control channel is not occupied, and the CPU processing load of the AC is not increased.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of virtual cellular co-frequency networking provided in the prior art;

fig. 2 is a schematic diagram of a virtual port same-frequency networking provided in the prior art;

fig. 3 is a flowchart illustrating a method for handover processing of a wireless access point according to an embodiment of the present invention;

fig. 4 is a flowchart illustrating a method for handover processing of a wireless access point according to an embodiment of the present invention;

fig. 5 is a flowchart illustrating a method for handover processing of a wireless access point according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a wireless access point handover processing apparatus according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a wireless access point handover processing apparatus according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a wireless access point handover processing apparatus according to an embodiment of the present invention;

fig. 9 is a schematic view of a topology of a same-frequency networking network according to an embodiment of the present invention;

fig. 10 is a schematic diagram illustrating a module interaction process between an AP side and an AC side according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a system for processing handover of a wireless access point according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a wireless access point handover processing device according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, the "plurality" or "a plurality" mentioned herein means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

The terms "first," "second," and the like in the description and in the claims, and in the drawings described above, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In a network of the same-frequency networking, for each wireless terminal, a wireless access point accessed by the wireless terminal may be recorded as a wireless access point associated with the wireless terminal, and for convenience of description, may be recorded as a first wireless access point corresponding to the wireless terminal. The wireless access point that the wireless terminal does not access may be regarded as a wireless access point that the wireless terminal does not associate with, and for convenience of description, may be regarded as a second wireless access point that the wireless terminal corresponds to.

In order to solve the problem that in the current network of the same-frequency networking, each wireless access point is required to report the signal intensity of the wireless terminal determined by each wireless access point to an access controller, and the access controller performs the switching decision of the wireless access point of the wireless terminal according to the signal intensity of the wireless terminal reported by each wireless access point: the application provides that each wireless access point does not need to report the determined signal strength of the wireless terminal to an access controller, only a first wireless access point corresponding to the wireless terminal needs to broadcast the monitored signal strength (which can be recorded as a first signal strength) of the wireless terminal through a beacon frame, and a second wireless access point corresponding to each wireless terminal receiving the beacon frame can combine the determined signal strength (which can be recorded as a second signal strength) corresponding to the wireless terminal to make a wireless access point switching decision of the wireless terminal, and when the wireless access point to which the wireless terminal needs to be accessed is determined to be switched to itself, a switching request message is sent to the access controller through the WAP CAPWAP control channel, the wireless access point handover is performed by the access controller.

It should be noted that, for a wireless terminal, at least one second wireless access point corresponding to the wireless terminal may send a handover request message to the access controller at the same time, and when the access controller executes the wireless access point handover, the access controller may access a wireless terminal from a first wireless access point corresponding to the wireless terminal to a second wireless access point corresponding to the wireless terminal according to the received handover request message.

It should be further noted that, when the access controller performs the wireless access point handover, the access controller may further access a wireless terminal from its corresponding first wireless access point to its corresponding second wireless access point in combination with the load balancing policy and/or the limitation of the number of access wireless terminals of the second wireless access point.

Based on the above description, an embodiment of the present invention provides a method for handing over a wireless access point, where the method may be applied to a first wireless access point corresponding to a wireless terminal (assumed to be denoted as STA1), and a flow of steps of the method may be as shown in fig. 3, where the method includes:

step 101, the first wireless access point monitors the signal strength of the wireless terminal.

In this step, since the wireless terminal (STA1) accesses the first wireless access point, the first wireless access point can monitor the signal strength of the accessing wireless terminal (STA1), i.e., can monitor the signal strength of the wireless terminal (STA1) for the first wireless access point. The signal strength of the wireless terminal (STA1) that the first wireless access point listens for may be achieved by any means, which is not limited by the embodiment.

And 102, the first wireless access point carries the monitored signal strength in a beacon frame corresponding to the wireless terminal, and broadcasts by using the beacon frame.

In this step, the first wireless access point may carry the monitored signal strength of the accessed wireless terminal (STA1) in a beacon frame corresponding to the wireless terminal (STA1) and broadcast the beacon frame.

In this way, the second wireless access point corresponding to each wireless terminal (STA1) that receives the beacon frame may determine whether to execute a handover decision according to the signal strength of the wireless terminal (STA1) determined by itself and the signal strength of the wireless terminal (STA1) carried in the beacon frame, where the handover decision refers to that the wireless access point associated with the wireless terminal (STA1) needs to be handed over from the first wireless access point to itself, and when it is determined to execute the handover decision, the second wireless access point sends a handover request message to the access controller through the CAPWAP control channel to request the access controller to execute the handover decision.

In one possible implementation, the first wireless access point may carry the monitored signal strength of the wireless terminal (STA1) in a beacon frame custom Information Element (IE) field corresponding to the wireless terminal (STA 1).

In addition, in a possible implementation manner, the first wireless access point may further carry other information, for example, the physical address of the wireless terminal (STA1) and the physical address of itself, in a beacon frame corresponding to the wireless terminal (STA1), so that the second wireless access point may also obtain other information, for example, the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point, when receiving the beacon frame. Therefore, the STA1 can be carried in a handover request message sent to the access controller, so that the access controller can execute a handover decision according to the information carried in the handover request message, and handover the wireless terminal (STA1) from a first wireless access point to which the STA1 has access to a second wireless access point.

Of course, if the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point are further carried in the beacon frame corresponding to the wireless terminal (STA1), the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point may also be carried in the beacon frame custom Information Element (IE) field.

From a second wireless access point side corresponding to a wireless terminal (assumed to be still STA1), an embodiment of the present invention provides a method for handing over a wireless access point, where a flow of steps of the method may be as shown in fig. 4, and includes:

step 201, the second wireless access point receives a beacon frame corresponding to the wireless terminal broadcast by the first wireless access point corresponding to the wireless terminal.

In this step, the second wireless access point receives the beacon frame corresponding to the wireless terminal (STA1) broadcast by the first wireless access point corresponding to the wireless terminal (STA 1). The beacon frame received by the second wireless access point carries the signal strength of the wireless terminal (STA1) that the first wireless access point hears.

Step 202, the second wireless access point determines whether to execute a handover decision according to the signal strength of the wireless terminal determined by the second wireless access point and the signal strength carried in the beacon frame.

A second wireless access point to which the wireless terminal (STA1) is not accessing may determine the signal strength of the wireless terminal (STA1), i.e., may determine the signal strength of the wireless terminal (STA1) for the second wireless access point. The manner in which the second wireless access point determines the signal strength of the wireless terminal (STA1) is not specifically limited in this embodiment.

In this step, the second wireless access point may determine whether to perform a handover decision according to the signal strength of the wireless terminal (STA1) determined by itself and the signal strength of the wireless terminal (STA1) carried in the received beacon frame. The handoff decision is the need to handoff the wireless terminal (STA1) from the first wireless access point to associate with itself.

The second wireless access point determines whether to execute a handover decision according to the signal strength of the wireless terminal (STA1) determined by the second wireless access point and the signal strength of the wireless terminal (STA1) carried in the received beacon frame, which may be implemented in any manner.

For example, the second wireless access point may determine whether to perform a handoff decision each time the signal strength of the wireless terminal (STA1) is determined, based on the determined signal strength of the wireless terminal (STA1) and the signal strength of the wireless terminal (STA1) carried in the most recently received beacon frame; and/or;

each time the second wireless access point receives a beacon frame, it determines whether to perform a handoff decision based on the signal strength of the wireless terminal (STA1) that was most recently determined and the signal strength of the wireless terminal (STA1) carried in the received beacon frame.

It should be noted that the signal strength of the wireless terminal (STA1) carried in the beacon frame received last time may be obtained from the set wireless terminal information database.

If the first wireless access point also carries the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point in the beacon frame corresponding to the wireless terminal (STA1), in one possible implementation, the signal strength of the wireless terminal (STA1) carried in the beacon frame corresponding to the wireless terminal (STA1) may be stored in a wireless terminal information database based on the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point, and the stored signal strength of the wireless terminal (STA1) may be updated each time the beacon frame corresponding to the wireless terminal (STA1) is received. The signal strength of the wireless terminal (STA1) carried in the beacon frame received the last time can thus be obtained from the wireless terminal information database.

Similarly, the signal strength of the wireless terminal (STA1) that was most recently determined may also be obtained from a database of set wireless terminal information.

If the first wireless access point also carries the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point in the beacon frame corresponding to the wireless terminal (STA1), in one possible implementation, the determined signal strength of the wireless terminal (STA1) may be stored in a wireless terminal information database based on the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point, and the stored signal strength of the wireless terminal (STA1) may be updated each time the signal strength of the wireless terminal (STA1) is determined. The signal strength of the wireless terminal (STA1) that was most recently determined can thus be obtained from the wireless terminal information database.

In one possible implementation, the second wireless access point determines whether to perform the handoff decision based on the signal strength of the wireless terminal (STA1) determined by itself and the signal strength of the wireless terminal (STA1) carried in the received beacon frame, which may be implemented by comparing the signal strength of the wireless terminal (STA1) determined by itself and the signal strength of the wireless terminal (STA1) carried in the received beacon frame. And may determine to perform a handoff decision when it is determined that the signal strength of the wireless terminal (STA1) determined by itself is greater than the signal strength of the wireless terminal (STA1) carried in the received beacon frame.

In this step, the second wireless access point may send a handover request message to the access controller through the CAPWAP control channel when determining to execute the handover decision, and request the access controller to execute the handover decision.

It can be understood that, when determining to execute the handover decision, the second wireless access point may send a handover request message to the access controller through the CAPWAP control channel, and request the access controller to execute the handover decision according to information carried in the handover request message.

In one possible implementation manner, the signal strength of the wireless terminal (STA1) carried in the beacon frame and the signal strength of the wireless terminal (STA1) determined by the second wireless access point may be carried in the handover request message, so that the access controller performs a handover decision according to the information carried in the handover request message.

It can be understood that the access controller may perform operations such as debugging, tracking, positioning, and the like in the wireless access point handover process according to the signal strength information carried in the handover request message.

Further, if the first wireless access point further carries the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point in the beacon frame corresponding to the wireless terminal (STA1), the handover request message may further carry the physical address of the wireless terminal (STA1) and the physical address of the first wireless access point, which are carried in the beacon frame, so that the access controller may further perform a handover decision according to the physical address of the wireless terminal (STA1) and the physical address information of the first wireless access point, which are carried in the handover request message.

It is understood that the access controller may further perform handover of the first wireless access point accessed by the wireless terminal (STA1) according to the physical address of the wireless terminal (STA1) and the physical address information of the first wireless access point, which are carried in the handover request message.

In this embodiment, in a possible implementation manner, the signal strength of the wireless terminal (STA1), the physical address of the wireless terminal (STA1), the physical address of the first wireless access point, the physical address of the second wireless access point, and the signal strength of the wireless terminal (STA1) determined by the second wireless access point, which are carried in the beacon frame, may be carried in the handover request message, so that the access controller performs a handover decision according to the information carried in the handover request message.

From an access controller side in an intra-frequency networking network where a wireless terminal (assumed to be STA1) is located, an embodiment of the present invention provides a method for processing handover of a wireless access point, where a flow of steps of the method may be as shown in fig. 5, and the method includes:

step 301, the access controller receives a switching request message sent by a second wireless access point corresponding to the wireless terminal through a CAPWAP control path.

In this step, the access controller receives a handover request message sent by a second wireless access point corresponding to the wireless terminal (STA1) through a CAPWAP control path.

The handover request message is a beacon frame corresponding to the wireless terminal (STA1) and broadcasted by the first wireless access point corresponding to the wireless terminal (STA1) received by the second wireless access point, and whether a handover decision is to be executed is determined according to the signal strength of the wireless terminal (STA1) determined by the second wireless access point and the signal strength of the wireless terminal (STA1) carried in the beacon frame, wherein the handover decision is sent when the handover decision is determined to be executed, and the handover decision is that the wireless access point associated with the wireless terminal (STA1) needs to be handed over from the first wireless access point to the second wireless access point.

Step 302, the access controller executes a handover decision corresponding to the handover request message according to the received handover request message.

For the wireless terminal (STA1), the access controller may simultaneously receive a handover request message sent by a second wireless access point corresponding to at least one wireless terminal (STA1), and when the access controller performs a handover decision, the access controller may access the wireless terminal (STA1) from its corresponding first wireless access point to its corresponding second wireless access point according to the received handover request message.

That is, the access controller selects a second wireless access point for the wireless terminal (STA1) to access from its corresponding first wireless access point, and sends the handover request message. Of course, selecting a second wireless access point for sending the handover request message to access may also be understood as including not selecting the second wireless access point and not performing the handover of the wireless access point.

In this embodiment, the access controller may select a second wireless access point for sending the handover request message to access in any manner.

For example, a second wireless access point sending the handover request message may be randomly selected for access.

For another example, in a possible implementation manner, the access controller may execute the handover decision corresponding to the handover request message according to a set condition, for example, a wireless access point load balancing policy and/or a limit on the number of second wireless access point access wireless terminals corresponding to the handover request message. That is, the access controller may select a second wireless access point that sends the handover request packet to access according to the wireless access point load balancing policy and/or the number limit of the second wireless access point that accesses the wireless terminal corresponding to the handover request packet.

It should be noted that, in this step, each handover request message may carry the signal strength of the wireless terminal (STA1), the physical address of the wireless terminal (STA1), the physical address of the first wireless access point, the physical address of the second wireless access point that sends the handover request message, and the signal strength of the wireless terminal (STA1) determined by the second wireless access point, which are carried in the beacon frame, in this step, the access controller may execute a handover decision corresponding to the handover request message according to information carried in the handover request message.

That is, after selecting a second wireless access point to be accessed, the access controller may execute the wireless access point switching according to the information carried in the switching request message corresponding to the second wireless access point.

Corresponding to the provided method, the following device is further provided.

An embodiment of the present invention provides a wireless access point handover processing apparatus, which may be integrated in a first wireless access point corresponding to a wireless terminal, and a structure of the apparatus may be as shown in fig. 6, where the apparatus includes:

the wireless terminal monitoring module 11 is configured to monitor a first signal strength of a wireless terminal, where the first wireless access point is a wireless access point associated with the wireless terminal in a network of a same-frequency networking;

the wireless terminal information issuing module 12 is configured to carry the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and broadcast the beacon frame;

In a possible implementation manner, the wireless terminal information issuing module 12 is configured to carry the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and includes: and carrying the monitored first signal strength in a beacon frame custom information element field corresponding to the wireless terminal.

In a possible implementation manner, the wireless terminal information issuing module 12 is configured to carry the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and includes: and carrying the monitored first signal strength, the physical address of the wireless terminal and the physical address of the first wireless access point in a beacon frame corresponding to the wireless terminal.

An embodiment of the present invention provides a wireless access point handover processing apparatus, which may be integrated in a second wireless access point corresponding to a wireless terminal, and a structure of the apparatus may be as shown in fig. 7, where the apparatus includes:

the wireless terminal information receiving module 21 is configured to receive a beacon frame corresponding to a wireless terminal broadcast by a first wireless access point, where the second wireless access point is a wireless access point that is not associated with the wireless terminal in a network with the same-frequency networking, the first wireless access point is a wireless access point that is associated with the wireless terminal in the network with the same-frequency networking, and the beacon frame carries a first signal strength of the wireless terminal monitored by the first wireless access point;

the wireless terminal information acquisition module 22 is configured to determine a second signal strength of the wireless terminal;

the wireless access point switching decision module 23 is configured to determine whether to execute a switching decision according to the second signal strength of the wireless terminal determined by the wireless terminal information acquisition module and the first signal strength carried in the beacon frame received by the wireless terminal information receiving module, and when it is determined to execute the switching decision, send a switching request packet to an access controller through a control and configuration protocol control channel of the wireless access point, and request the access controller to execute the switching decision, where the switching decision is to switch the wireless access point associated with the wireless terminal from the first wireless access point to the second wireless access point.

In a possible implementation manner, the apparatus may further include a wireless terminal information database module 24, configured to store a first signal strength carried in the beacon frame that is received by the wireless terminal information receiving module last time, and store a second signal strength of the wireless terminal that is determined by the wireless terminal information collecting module last time;

the wireless access point switching decision module 23 is configured to determine whether to execute a switching decision according to the second signal strength of the wireless terminal determined by the wireless terminal information acquisition module and the first signal strength carried in the beacon frame received by the wireless terminal information receiving module, and includes:

when the wireless terminal information acquisition module determines the second signal intensity of the wireless terminal each time, determining whether to execute a switching decision according to the determined second signal intensity of the wireless terminal and the first signal intensity carried in the beacon frame received last time by the wireless terminal information receiving module stored in the wireless terminal information database module; and/or;

and when the wireless terminal information receiving module receives the beacon frame every time, determining whether to execute a switching decision according to the second signal strength of the wireless terminal which is determined by the wireless terminal information acquisition module for the last time and is stored in the wireless terminal information database module and the first signal strength carried in the received beacon frame.

In a possible implementation manner, the beacon frame further carries a physical address of the wireless terminal and a physical address of the first wireless access point;

It should be noted that, one wireless access point may serve as both a first wireless access point corresponding to one wireless terminal and a second wireless access point corresponding to one wireless terminal, and therefore, the apparatuses shown in fig. 6 and 7 may be integrated into one wireless access point, so that the one wireless access point may serve as both the first wireless access point and the second wireless access point.

An embodiment of the present invention provides a wireless access point handover processing apparatus, which may be integrated in an access controller in a network with a same-frequency networking, and a structure of the apparatus may be as shown in fig. 8, where the apparatus includes:

the message receiving module 31 is configured to receive a switching request message sent by a second wireless access point corresponding to the wireless terminal through a control and configuration protocol control path of the wireless access point;

the wireless access point switching module 32 is configured to execute a switching decision corresponding to the switching request message according to the switching request message received by the message receiving module;

In a possible implementation manner, the wireless access point switching module 32 is specifically configured to execute, according to the switching request packet, a switching decision corresponding to the switching request packet in combination with a wireless access point load balancing policy and/or a number limit of the second wireless access point access wireless terminals corresponding to the switching request packet.

The functions of the functional units of the apparatuses provided in the above embodiments of the present invention may be implemented by the steps of the corresponding methods, and therefore, detailed working processes and beneficial effects of the functional units in the apparatuses provided in the embodiments of the present invention are not described herein again.

The following describes the scheme provided by the embodiment of the present invention by using a specific example, in combination with the apparatuses provided in fig. 6 to 8.

The topology diagram of the same-frequency networking network may be as shown in fig. 9, and includes an AC and two APs (denoted as AP1 and AP2, respectively), and the AC and the two APs may be connected through a Switch (SW), and the SW may be connected to the Internet (Internet).

Assume that at a certain time, for STA1, the corresponding first wireless access point is AP1 and the corresponding second wireless access point is AP 2. AP1 and AP2 both send out the same BSSID (both may be 16fe. fe01.1001) over the same Channel (which may be denoted as Channel 36) to provide wireless access services to STA 1.

In this embodiment, the STA information issuing module in the AP1 may fill the RSSI of the STA1, the MAC address of the STA1, and the MAC address of the AP1, which are monitored by the STA monitoring module in the AP1, in the Beacon frame corresponding to the STA1, and broadcast the filling information by using the Beacon frame corresponding to the STA 1.

The STA information receiving module in the AP2 may parse the Beacon frame each time it receives the Beacon frame, and update the STA information database module in the AP2 according to the parsed information. In this embodiment, the AP2 may start the wireless access point handover decision module each time the Beacon frame corresponding to the STA1 is received, and determine whether a handover decision may be executed once.

In addition, in this embodiment, the STA information collection module in the AP2 may collect the RSSI of the STA1, and update the STA information database module in the AP2 each time the RSSI of the STA1 is collected. In this embodiment, the AP2 may also start the wireless access point handover decision module each time the RSSI of the STA1 is collected, and determine whether a handover decision can be performed once.

A wireless access point handoff decision module in AP2 determines whether to perform a handoff decision, i.e., whether to need to handoff STA1 from AP1 to AP 2. If the wireless access point handover decision module in AP2 determines to perform a handover decision, a handover request message may be sent to the AC.

When the message receiving module in the AC receives the handover request message, the wireless access point handover module may execute a handover decision corresponding to the handover request message in combination with factors such as a load balancing policy of the wireless access points (AP1, AP2), a number limit of STAs accessed by AP2, and the like, determine whether to perform AP handover, and start an AP handover procedure when determining to perform AP handover.

A schematic diagram of the module interaction process between the AP side and the AC side may be as shown in fig. 10. According to the scheme provided by the embodiment of the invention, the rapidity and timeliness of the AP switching decision can be improved without improving the frequency of reporting the signal intensity of the STA to the AC by the AP, and the problems of continuous packet loss and even disconnection of the STA caused by untimely AP switching decision of the STA are solved.

Based on the same inventive concept, the embodiments of the present invention provide the following systems.

An embodiment of the present invention provides a system for switching and processing wireless access points, where the system includes a first wireless access point 41 corresponding to a wireless terminal in a network with same-frequency networking, at least one second wireless access point 42 corresponding to the wireless terminal, and an access controller 43, the first wireless access point is a wireless access point associated with the wireless terminal in the network with same-frequency networking, and the second wireless access point is a wireless access point not associated with the wireless terminal in the network with same-frequency networking, and a structure of the system may be as shown in fig. 11, and includes:

the first wireless access point 41 is configured to monitor a first signal strength of the wireless terminal, carry the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and broadcast the beacon frame;

the second wireless access point 42 is configured to determine whether to execute a handover decision according to the determined second signal strength of the wireless terminal and the received first signal strength carried in the beacon frame, and send a handover request packet to the access controller through a control and configuration protocol control path of the wireless access point when determining to execute the handover decision, where the handover decision refers to that the wireless access point associated with the wireless terminal needs to be handed over from the first wireless access point to the second wireless access point;

the access controller 43 is configured to execute a handover decision corresponding to the handover request packet.

Based on the same inventive concept, embodiments of the present invention provide the following apparatus and medium.

An embodiment of the present invention provides a block chain data processing device, which may have a structure as shown in fig. 12, and includes a processor 51, a communication interface 52, a memory 53, and a communication bus 54, where the processor 51, the communication interface 52, and the memory 53 complete mutual communication through the communication bus 54;

the memory 53 is used for storing computer programs;

the processor 51 is configured to implement the steps of the above method embodiments of the present invention when executing the program stored in the memory.

Optionally, the processor 51 may specifically include a Central Processing Unit (CPU), an Application Specific Integrated Circuit (ASIC), one or more Integrated circuits for controlling program execution, a hardware Circuit developed by using a Field Programmable Gate Array (FPGA), or a baseband processor.

Optionally, the processor 51 may include at least one processing core.

Alternatively, the Memory 53 may include a Read-Only Memory (ROM), a Random Access Memory (RAM), and a disk Memory. The memory 53 is used for storing data required by the at least one processor 51 during operation. The number of the memory 53 may be one or more.

An embodiment of the present invention further provides a non-volatile computer storage medium, where the computer storage medium stores an executable program, and when the executable program is executed by a processor, the method provided in the foregoing method embodiment of the present invention is implemented.

In particular implementations, computer storage media may include: various storage media capable of storing program codes, such as a Universal Serial Bus Flash Drive (USB), a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

In the embodiments of the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the described unit or division of units is only one division of logical functions, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical or other form.

The functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be an independent physical module.

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 computer readable storage medium. Based on such understanding, all or part of the technical solutions of the embodiments of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device, such as a personal computer, a server, or a network device, or a processor (processor) to execute all or part of the steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a Universal Serial Bus Flash Drive (usb Flash Drive), a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for switching wireless access points is applied to a first wireless access point, wherein the first wireless access point is a wireless access point associated with a wireless terminal in a network of same-frequency networking, and the method comprises the following steps:

2. The method of claim 1, wherein the first wireless access point carries the monitored first signal strength in a beacon frame corresponding to the wireless terminal, comprising:

3. The method of claim 1 or 2, wherein the first wireless access point carries the monitored first signal strength in a beacon frame corresponding to the wireless terminal, and the method comprises:

4. A wireless access point switching processing method is applied to a second wireless access point, wherein the second wireless access point is a wireless access point which is not associated with a wireless terminal in a network of same-frequency networking, and the method comprises the following steps:

5. The method of claim 4, wherein the second wireless access point determining whether to perform a handover decision based on the determined second signal strength of the wireless terminal and the first signal strength carried in the beacon frame comprises:

6. The method according to claim 4 or 5, wherein the beacon frame further carries a physical address of the wireless terminal and a physical address of the first wireless access point;

7. A wireless access point switching processing method is characterized in that the method is applied to an access controller in a network of same-frequency networking, and comprises the following steps:

8. The method of claim 7, wherein performing the handover decision corresponding to the handover request message according to the handover request message comprises:

9. A wireless access point switching processing system is characterized in that the system comprises a first wireless access point corresponding to a wireless terminal in a network of same-frequency networking, at least one second wireless access point corresponding to the wireless terminal and an access controller, the first wireless access point is a wireless access point associated with the wireless terminal in the network of same-frequency networking, the second wireless access point is a wireless access point not associated with the wireless terminal in the network of same-frequency networking, wherein:

10. A wireless access point switching processing device applied to a first wireless access point, the device comprising:

11. A wireless access point switching processing device applied to a second wireless access point, the device comprising:

12. A wireless access point handover processing device, applied to an access controller, the device comprising:

13. A non-transitory computer storage medium storing an executable program for execution by a processor to perform the method of any one of claims 1 to 8.

14. A wireless access point switching processing device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are used for completing mutual communication through the communication bus;

the memory is used for storing a computer program;

the processor, when executing the program stored in the memory, implementing the method steps of any of claims 1-8.