Wireless communication system and wireless communication method

Abstract

The embodiment of the invention provides a wireless communication system which is applied to the field of wireless communication. A wireless communication system includes a plurality of access points (APs). The plurality of APs includes a first AP, a second AP, and a third AP. The plurality of APs includes the same basic service set identifier (BSSID). A first communication link is established between the first AP and the station STA. And the access controller AC managing the plurality of APs is used for sending the second management and control instruction to the second AP. The second management and control instruction comprises related information of the STA. The second AP is used for not replying the wireless signal of the STA according to the second control instruction. And after determining that the STA needs to communicate with the third AP, the AC is also used for sending the connection information of the STA to the third AP. And the third AP is used for establishing a third communication link with the STA according to the connection information of the STA. In the technical scheme provided by the invention, the plurality of APs are divided into the plurality of AP groups, so that other AP groups do not perform communication management and control on the STAs, thereby improving the number of the STAs connected with the wireless communication system.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and in particular, to a wireless communication system and a wireless communication method. Background Art

[0002] In a wireless communication system, in order to achieve seamless roaming, multiple APs use the same basic service set identifier (BSSID). A station (STA) cannot distinguish different access points (APs). At this time, communication between the STA and the AP may be chaotic. For example, the STA is associated with AP1, and the STA sends an uplink packet to AP1. Both AP1 and AP2 can receive the uplink packet. Because the BSSIDs are the same, both AP1 and AP2 think that they are the recipients of this data packet. After successful reception, both AP1 and AP2 will reply to the STA with an ACK. The two ACKs will cause a radio interface conflict. After the STA fails to parse the ACK, it will resend the uplink packet. Therefore, the wireless communication system needs to control the communication between AP2 and the STA. Specifically, AP2 obtains the connection information of the STA and creates a virtual user corresponding to the STA according to the connection information of the STA. AP2 does not reply to the uplink packets of the virtual user, thereby avoiding communication chaos. The virtual user will occupy corresponding resources. Before communication control is performed through the virtual user, the number of STAs that the wireless communication system can access is the product of N and M. Where N is the number of APs in the wireless communication system, and M is the maximum number of STAs that a single AP can access. After communication control is performed, the number of STAs that the wireless communication system can access is M.

[0003] Therefore, communication control will reduce the carrying capacity of the wireless communication system. Summary of the Invention

[0004] This application provides a wireless communication system and a wireless communication method. By dividing multiple APs into multiple AP groups, other AP groups can be made not to perform communication control on the STA, thereby increasing the number of STAs connected to the wireless communication system.

[0005] The first aspect of the present application provides a wireless communication system. The wireless communication system includes multiple access points AP. The multiple APs include a first AP, a second AP, and a third AP. The multiple APs have the same BSSID. A first communication link is established between the first AP and the STA. The AC that manages the multiple APs is used to send a second control instruction to the second AP. The second control instruction includes relevant information of the STA. The second AP is used to not reply to the wireless signal of the STA according to the second control instruction. After determining that the STA needs to communicate with the third AP, the AC is further used to send the connection information of the STA to the third AP. The third AP is used to establish a third communication link with the STA according to the connection information of the STA.

[0006] In the present application, the number of STAs that the wireless communication system can access is equal to K×M. Wherein, K is the number of AP groups, and M is the number of STAs that a single AP can access. Therefore, the embodiments of the present application can increase the number of STAs connected to the wireless communication system.

[0007] In an optional manner of the first aspect, the frequencies of the first communication link and the third communication link are the same. The AC is further used to send a first control instruction to the first AP. The first control instruction includes the identifier of the STA. The first AP is used to disconnect the first communication link according to the first control instruction. By disconnecting the first communication link, communication chaos can be avoided, thereby improving the reliability of wireless communication.

[0008] In an optional manner of the first aspect, the first AP is further used to not reply to the wireless signal of the STA according to the first control instruction. By controlling the wireless signal of the STA by the first AP, the possibility of communication chaos can be reduced.

[0009] In an optional manner of the first aspect, the multiple APs include a first AP group and a second AP group. The first AP group includes the first AP and the second AP. The second AP group includes the third AP. The wireless communication frequencies of the first AP group and the second AP group are different. The wireless communication frequencies of the APs in the same AP group are the same. The wireless communication frequencies of the first AP and the second AP are the same. The wireless communication frequencies of the first AP and the third AP are different. By dividing the AP groups by wireless communication frequencies, it is possible to prevent the same wireless signal of the STA from being received by the APs in two AP groups, thereby reducing the possibility of communication chaos.

[0010] In an alternative manner of the first aspect, before establishing a third communication link between the third AP and the STA, the third AP is further configured to delete the relevant information of another STA. Before deleting the relevant information of another STA, the third AP does not reply to the wireless signals from another STA, that is, the third AP controls the wireless signals of another STA. By deleting the relevant information of another STA, the number of STAs establishing non-virtual links with the third AP can be increased. Therefore, the present application can increase the number of STAs connected to the wireless communication system.

[0011] In an alternative manner of the first aspect, the multiple APs further include a fourth AP. After the third AP and the STA establish a third communication link, if the signal strength between the STA and the fourth AP is greater than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP. The fourth control instruction includes the relevant information of the STA. The fourth AP is configured not to reply to the wireless signals of the STA according to the fourth control instruction. By dividing the APs into groups according to the signal strength, the possibility of communication chaos can be reduced.

[0012] In an alternative manner of the first aspect, after the third AP and the STA establish a third communication link, if the number of STAs controlled by the fourth AP is less than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP. The fourth control instruction includes the relevant information of the STA. The fourth AP is configured not to reply to the wireless signals of the STA according to the fourth control instruction. By determining whether to reply to the wireless signals of the STA based on the number of STAs controlled, the efficiency of the STA roaming to the fourth AP can be increased. Therefore, the present application can improve the roaming efficiency of the STA.

[0013] In an alternative manner of the first aspect, the relevant information of the STA is the media access control (MAC) address of the STA. The AC is further configured to send an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes the connection information of the STA. The fourth AP is further configured to establish a fourth communication link with the STA according to the connection information of the STA. The AC is further configured to send a third control instruction to the third AP. The third control instruction includes the identifier of the STA. The third AP is further configured to disconnect the third communication link according to the third control instruction and not reply to the wireless signals of the STA. By controlling the wireless signals of the STA through the MAC address of the STA, the control efficiency can be improved and the resources used by the AP can be reduced.

[0014] In an alternative manner of the first aspect, the relevant information of the STA is the connection information of the STA. The AC is further configured to send an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes the identifier of the STA. The fourth AP is further configured to reply to the wireless signal of the STA according to the intra-group roaming instruction. The AC is further configured to send a third control instruction to the third AP. The third control instruction includes the identifier of the STA. The third AP is further configured to disconnect the third communication link according to the third control instruction and not reply to the wireless signal of the STA. By controlling the wireless signal of the STA through the connection information of the STA, that is, by means of virtual users or virtual links, the efficiency of the STA roaming to the third AP can be improved.

[0015] A second aspect of the present application provides a wireless communication method. The wireless communication method includes the following steps: The AC sends a second control instruction to the second AP among multiple APs. The second control instruction includes the relevant information of the STA. The multiple APs include a first AP, a second AP, and a third AP. A first communication link is established between the first AP and the STA. The second control instruction is used for the second AP not to reply to the wireless signal of the STA according to the second control instruction. After determining that the STA needs to communicate with the third AP, the AC sends the connection information of the STA to the third AP. The connection information of the STA is used for the third AP to establish a third communication link with the STA according to the connection information of the STA.

[0016] In an alternative manner of the second aspect, the wireless communication method further includes the following steps: The AC sends a first control instruction to the first AP. The first control instruction includes the identifier of the STA. The first control instruction is used for the first AP to disconnect the first communication link according to the first control instruction.

[0017] In an alternative manner of the second aspect, the first control instruction is further used for the first AP not to reply to the wireless signal of the STA.

[0018] In an alternative manner of the second aspect, the multiple APs include a first AP group and a second AP group. The first AP group includes the first AP and the second AP. The second AP group includes the third AP. The wireless communication frequencies of the first AP group and the second AP group are different. The wireless communication frequencies of the APs in the same AP group are the same.

[0019] In an alternative manner of the second aspect, the multiple APs further include a fourth AP. The wireless communication method further includes the following steps: After the third AP establishes a third communication link with the STA, if the signal strength between the STA and the fourth AP is greater than a threshold, the AC sends a fourth control instruction to the fourth AP. The fourth control instruction includes the relevant information of the STA. The fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

[0020] In an alternative manner of the second aspect, the wireless communication method further includes the following steps: after a third communication link is established between the third AP and the STA, if the number of STAs controlled by the fourth AP is less than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP, the fourth control instruction includes relevant information of the STA, and the fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

[0021] In an alternative manner of the second aspect, the relevant information of the STA is the MAC address of the STA, and the wireless communication method further includes the following steps: the AC sends an intra-group roaming instruction to the fourth AP, the intra-group roaming instruction includes connection information of the STA, and the intra-group roaming instruction is used for the fourth AP to establish a fourth communication link with the STA according to the connection information of the STA; the AC sends a third control instruction to the third AP, the third control instruction includes an identifier of the STA, and the third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not to reply to the wireless signal of the STA.

[0022] In an alternative manner of the second aspect, the relevant information of the STA is the connection information of the STA, and the wireless communication method further includes the following steps: the AC sends an intra-group roaming instruction to the fourth AP, the intra-group roaming instruction includes an identifier of the STA, and the intra-group roaming instruction is used for the fourth AP to reply to the wireless signal of the STA according to the intra-group roaming instruction; the AC sends a third control instruction to the third AP, the third control instruction includes an identifier of the STA, and the third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not to reply to the wireless signal of the STA.

[0023] A third aspect of the present application provides an AC. The AC includes a first sending unit and a second sending unit. The first sending unit is configured to send a second control instruction to a second AP among multiple APs, the second control instruction includes relevant information of the STA, the multiple APs include a first AP, a second AP, and a third AP, a first communication link is established between the first AP and the STA, and the second control instruction is used for the second AP not to reply to the wireless signal of the STA according to the second control instruction; after it is determined that the STA needs to communicate with the third AP, the second sending unit is configured to send connection information of the STA to the third AP, and the connection information of the STA is used for the third AP to establish a third communication link with the STA according to the connection information of the STA.

[0024] In an alternative manner of the third aspect, the first sending unit is further configured to send a first control instruction to the first AP, the first control instruction includes an identifier of the STA, and the first control instruction is used for the first AP to disconnect the first communication link according to the first control instruction.

[0025] In an alternative manner of the third aspect, the first control instruction is further used for the first AP not to reply to the wireless signal of the STA.

[0026] In an alternative manner of the third aspect, the multiple APs include a first AP group and a second AP group. The first AP group includes a first AP and a second AP, and the second AP group includes a third AP. The wireless communication frequencies of the first AP group and the second AP group are different. The wireless communication frequencies of the APs in the same AP group are the same.

[0027] In an alternative manner of the third aspect, the multiple APs further include a fourth AP. After the third AP establishes a third communication link with the STA, if the signal strength between the STA and the fourth AP is greater than a threshold, the first sending unit is further configured to send a fourth control instruction to the fourth AP. The fourth control instruction includes relevant information of the STA, and the fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

[0028] In an alternative manner of the third aspect, after the third AP establishes a third communication link with the STA, if the number of STAs controlled by the fourth AP is less than a threshold, the first sending unit is further configured to send a fourth control instruction to the fourth AP. The fourth control instruction includes relevant information of the STA, and the fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

[0029] In an alternative manner of the third aspect, the relevant information of the STA is the MAC address of the STA. The first sending unit is further configured to send an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes the connection information of the STA. The intra-group roaming instruction is used for the fourth AP to establish a fourth communication link with the STA according to the connection information of the STA. The first sending unit is further configured to send a third control instruction to the third AP. The third control instruction includes the identifier of the STA. The third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not to reply to the wireless signal of the STA.

[0030] In an alternative manner of the third aspect, the relevant information of the STA is the connection information of the STA. The first sending unit is further configured to send an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes the identifier of the STA. The intra-group roaming instruction is used for the fourth AP to reply to the wireless signal of the STA according to the intra-group roaming instruction. The first sending unit is further configured to send a third control instruction to the third AP. The third control instruction includes the identifier of the STA. The third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not to reply to the wireless signal of the STA.

[0031] A fourth aspect of the present application provides an AC. The AC includes a processor and a transceiver. The processor is configured to obtain the connection information of the STA and control the transceiver to execute the method in the second aspect or any one of the alternative manners in the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The first structural diagram of the wireless communication system provided by the embodiment of the present application;

[0033] Figure 2 The first flowchart of the wireless communication method provided by the embodiment of the present application;

[0034] Figure 3 The second flowchart of the wireless communication method provided by the embodiment of the present application;

[0035] Figure 4 The second structural diagram of the wireless communication system provided by the embodiment of the present application;

[0036] Figure 5 The third structural diagram of the wireless communication method provided by the embodiment of the present application;

[0037] Figure 6 The third structural diagram of the wireless communication system provided by the embodiment of the present application;

[0038] Figure 7 The fourth structural diagram of the wireless communication method provided by the embodiment of the present application;

[0039] Figure 8 The first structural diagram of the AC provided by the embodiment of the present application;

[0040] Figure 9 The second structural diagram of the AC provided by the embodiment of the present application. Detailed implementation manners

[0041] The present application provides a wireless communication system and a wireless communication method. By dividing multiple APs into multiple AP groups, it can be ensured that other AP groups do not perform communication control on STAs, thereby increasing the number of STAs that the wireless communication system can connect. It should be understood that the "first", "second", etc. used in the present application are only for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying an order. Additionally, for the sake of conciseness and clarity, repeated reference numerals and / or letters are used in multiple drawings of the present application. The repetition does not indicate a strict limiting relationship between various embodiments and / or configurations.

[0042] The wireless communication system in this application is applied to the field of wireless communication. In the field of wireless communication, in order to improve the coverage of wireless signals, a wireless communication system can be composed of multiple APs and an AC that manages multiple APs. In the wireless communication system, multiple APs include the same BSSID. The STA cannot distinguish different APs. The communication between the STA and the AP may be chaotic. For this reason, when AP1 among multiple APs is associated with the STA, other APs among multiple APs need to establish virtual users corresponding to the STA. Other APs manage the wireless signals of the STA through the virtual users corresponding to the STA. The virtual users will occupy corresponding resources, thus reducing the carrying capacity of the wireless communication system.

[0043] For this reason, this application provides a wireless communication system. Figure 1 It is the first structural schematic diagram of the wireless communication system provided by the embodiment of this application. As Figure 1 shown, the wireless communication system includes an AC 101 and multiple APs. The multiple APs include a first AP, a second AP, and a third AP. The AC 101 is connected to the multiple APs. The connection method can be optical fiber, electrical signal line, or wireless. For example, the wireless communication system is a passive optical network (PON) system, the AC 101 is an optical line terminal (OLT) in the PON system, and the multiple APs are optical network units (ONUs) in the PON system. Another example is that the AC 101 is a main (fiber to the room, FTTR) device. The multiple APs are slave FTTR devices. Another example is that the AC 101 is the main router in a mesh network. The multiple APs are sub-routers in the mesh network. The multiple APs include the same BSSID. In practical applications, each AP can include multiple VAPs. Each VAP corresponds to a different BSSID. Therefore, each AP can include multiple BSSIDs. When an AP includes multiple BSSIDs, the multiple APs including the same BSSID means that the multiple APs include at least one same BSSID. The first AP and the second AP belong to the first AP group. The third AP belongs to the second AP group. There is an overlapping area between the signal coverage ranges of the first AP and the second AP. There is an overlapping area between the signal coverage ranges of the second AP and the third AP.

[0044] It should be understood that Figure 1This is just an example of the wireless communication system provided by the embodiments of this application. In practical applications, those skilled in the art can make adaptive modifications to the wireless communication system according to requirements. For example, the first AP serves as an AC that manages multiple APs. Another example is that the second AP group further includes a fourth AP. Another example is that the wireless communication system further includes a fifth AP. The fifth AP belongs to the third AP group. Below, taking the wireless communication system in Figure 1 as an example, the functions of the AC 101 and multiple APs in the wireless communication system will be described. Figure 2 This is the first process schematic diagram of the wireless communication method provided by the embodiments of this application. As Figure 2 shown, the wireless communication method includes the following steps.

[0045] In step 201, the AC receives the connection information of the STA from the first AP.

[0046] A first communication link is established between the first AP and the STA, that is, the first AP and the STA are associated. The STA is a non-virtual user of the first AP. The first communication link is a wireless communication link. The STA connects to the network through the first AP, that is, the STA transmits an uplink signal through the first AP and receives a downlink signal from the first AP. The APs in the multiple APs can also be associated with other STAs. In the embodiments of this application, a wireless communication method is described by taking one STA associated with the first AP as an example. During the process of establishing the first communication link between the first AP and the STA, the first AP can obtain the connection information of the STA from the STA. The connection information of the STA can include the MAC address, capability information, key information, aggregation information, etc. of the STA. Other APs, such as the second AP, can establish a pre-connection with the STA through the connection information of the STA. The STA can roam to the AP with the pre-connection established without awareness. The AC receives the connection information of the STA from the first AP. It should be understood that when the first AP is an AC that manages multiple APs, the wireless communication method may not execute step 201.

[0047] In step 202, the AC sends the relevant information of the STA to the second AP.

[0048] The AC sends an in-group control instruction to all APs in the first AP group except the first AP. The in-group control instruction includes the relevant information of the STA. The relevant information of the STA can be the MAC address of the STA or the connection information of the STA. All APs in the first AP group except the first AP are abbreviated as other in-group APs. In the embodiments of this application, the first AP and the second AP belong to the first AP group. Therefore, other in-group APs include the second AP.

[0049] In step 203, the second AP does not reply to the wireless signal of the STA according to the relevant information of the STA.

[0050] Other APs within the same group do not reply to the wireless signals of the STA according to the in-group control instructions. For example, the relevant information of the STA is the MAC address of the STA. When the source address of the wireless signal received by other APs within the same group is the MAC address of the STA, other APs within the same group discard the wireless signal. Another example is that the relevant information of the STA is the connection information of the STA. Other APs within the same group establish a virtual user corresponding to the STA according to the connection information of the STA, that is, other APs within the same group establish a virtual link with the STA according to the connection information of the STA. A virtual user means that the AP pre-connects with the STA according to the connection information of the STA, that is, the AP simulates the creation of an associated user information, but the AP does not have data interaction with the STA, so it is a virtual user. On the contrary, the one that has real data interaction with the STA is a real user. Other APs within the same group do not reply to the wireless signals of virtual users, that is, other APs within the same group control the wireless signals of the STA by establishing virtual users.

[0051] In step 204, the AC sends the connection information of the STA to the third AP.

[0052] The AC determines whether the STA needs to communicate with the third AP. After the AC determines that the STA needs to communicate with the third AP, the AC sends the connection information of the STA to the third AP. After the AC determines that the STA does not need to communicate with the third AP, the AC does not send the connection information of the STA to the third AP. The embodiments of the present application do not limit the manner in which the AC determines whether the STA needs to communicate with the third AP. Several examples of how the AC determines whether the STA needs to communicate with the third AP are described below.

[0053] In the first example, the wireless communication frequencies of the APs in the first AP group are different from those of the APs in the second AP group. The APs in the first AP group use the first communication frequency. The APs in the second AP group use the second communication frequency. After the STA establishes a first communication link with the first AP, the STA communicates with the first AP through the wireless signal of the first communication frequency. The STA transmits the information that the STA needs to switch to the second communication frequency to the AC through the first AP. After the AC receives this information, the AC determines that the STA needs to communicate with the third AP. When the AC does not receive this information, the AC determines that the STA does not need to communicate with the third AP.

[0054] In the second example, the wireless communication frequencies of the APs in the first AP group are different from those of the APs in the second AP group. The APs in the first AP group use a first communication frequency. The APs in the second AP group use a second communication frequency. After the STA associates with the first AP, the STA communicates with the first AP through the first communication frequency. The AC can obtain the location information of the STA. When the distance between the STA and the first AP is greater than a threshold and the distance between the STA and the third AP is less than the threshold, the AC determines that the STA needs to communicate with the third AP. When the distance between the STA and the third AP is greater than the threshold, the AC determines that the STA does not need to communicate with the third AP. After the AC determines that the STA needs to communicate with the third AP, the AC also sends a notification to the STA to switch the frequency through the first AP.

[0055] In the third example, the wireless communication frequencies of the APs in the first AP group are the same as those of the APs in the second AP group. After the STA associates with the first AP, the location of the STA changes. Before the STA moves, the signal strength between the STA and the third AP is less than the threshold, and the signal strength between the STA and the first AP is greater than the threshold. The AC 101 determines that the STA does not need to communicate with the third AP based on the signal strengths between the STA and the third AP and the first AP. After the STA moves, the signal strength between the STA and the third AP is greater than the threshold, and the signal strength between the STA and the first AP is less than the threshold. The AC 101 determines that the STA needs to communicate with the third AP based on the signal strengths between the STA and the third AP and the first AP.

[0056] In the fourth example, the wireless communication frequencies of the APs in the first AP group are the same as those of the APs in the second AP group. After the STA associates with the first AP, the location of the STA changes. Before the STA moves, the distance between the STA and the third AP is greater than the threshold. When the distance between the STA and the third AP is greater than the threshold, the AC 101 determines that the STA does not need to communicate with the third AP. After the STA moves, the distance between the STA and the third AP is less than the threshold. When the distance between the STA and the third AP is less than the threshold, the AC 101 determines that the STA needs to communicate with the third AP.

[0057] In step 205, the third AP establishes a third communication link with the STA according to the connection information of the STA.

[0058] After the third AP obtains the connection information of the STA from the AC, the third AP establishes a third communication link with the STA through the connection information of the STA, that is, the third AP associates with the STA. The third AP and the first AP include the same BSSID. The STA can roam from the first AP to the third AP without awareness. After the STA roams to the third AP, the STA connects to the network through the third AP, that is, the STA transmits an uplink signal through the third AP and receives a downlink signal from the third AP. Before and after the STA roams, the wireless signal sent by the STA uses the same BSSID as the destination address, that is, the first wireless signal sent by the STA to the first AP and the third wireless signal sent by the STA to the third AP include the same BSSID.

[0059] In the embodiment of the present application, the number of STAs that the wireless communication system can access is equal to K×M. Wherein, K is the number of AP groups. M is the number of STAs that a single AP can access. Therefore, the embodiment of the present application can increase the number of STAs connected to the wireless communication system. In practical applications, an AP can include N VAPs. N is an integer greater than 1. Each VAP among the N VAPs is networked with the VAPs in other APs using the same BSSID. At this time, the number of STAs that the wireless access system can access is equal to K×M×N. Wherein, K is the number of AP groups. M is the number of STAs that a single VAP can access. In the present application, a wireless communication system and a wireless communication method will be described by taking one VAP in an AP or an AP without a VAP as an example.

[0060] According to Figure 1 the description, multiple APs include a first AP group and a second AP group. Next, an exemplary description of the method for dividing AP groups in the embodiment of the present application will be given.

[0061] In the first method, the AC divides multiple APs into multiple AP groups according to the frequencies of the APs. The APs in different AP groups use different wireless communication frequencies, and the APs within the same AP group use the same wireless communication frequency. For example, in Figure 1 wherein, the wireless communication frequency of the first AP is the same as that of the second AP. The wireless communication frequency of the first AP is different from that of the third AP. The APs in the first AP group use the first communication frequency. The APs in the second AP group use the second communication frequency. For example, the first communication frequency is channel 36, and the frequency is 5180 Mega Hertz (MHz); the second communication frequency is channel 149, and the frequency is 5745 MHz. The first communication frequency and the second communication frequency do not interfere with each other.

[0062] In the second method, the AC divides multiple APs into multiple AP groups according to the working time slots of the multiple APs. The working time slots of the APs in the same AP group are the same. The working time slots of the APs in different AP groups are different. For example, in Figure 1 the first AP group has the first time slot as the working time slot of the APs in it. The second AP group has the second time slot as the working time slot of the APs in it. The first time slot and the second time slot are alternately distributed.

[0063] In the third method, the AC divides multiple APs into multiple AP groups according to the signal strength between the STA and the multiple APs. The signal strength between the APs in the first AP group and the STA is greater than the threshold, and the signal strength between the APs in other AP groups and the STA is less than or equal to the threshold. For example, in Figure 1 the example, the first signal strength between the first AP and the STA is greater than the threshold, the second signal strength between the second AP and the STA is greater than the threshold, and the third signal strength between the third AP and the STA is less than the threshold.

[0064] It should be understood that the above has given an exemplary description of the method for dividing AP groups in the embodiments of the present application. The embodiments of the present application do not limit the method for the AC to divide AP groups. For example, in practical applications, the AC can divide AP groups according to the spatial positions of multiple APs, the antenna beam directions of multiple APs, or the protocol isolation content of multiple APs. In order to reduce the possibility of communication chaos, after grouping multiple APs.

[0065] In practical applications, the factors affecting the AC to divide AP groups may change. For example, the wireless communication frequency of a certain AP changes, or the position movement of the STA causes the signal strength between the STA and multiple APs to change. In order to improve the reliability of communication control, the AC can dynamically update the AP groups. Specifically, when the factors affecting the AC to divide AP groups change, the AC re-divides the AP groups. For example, in Figure 1 the example, before the factors affecting the AC to divide AP groups change, the first AP and the second AP use the first communication frequency, and the first AP and the second AP belong to the first AP group. The third AP uses the second communication frequency, and the third AP belongs to the second AP group. After the factors affecting the AC to divide AP groups change, the second AP uses the first communication frequency, and the second AP belongs to the first AP group. The second AP and the third AP use the second communication frequency, and the second AP and the third AP belong to the second AP group.

[0066] In Figure 2 the description, the STA has established a third communication link with the third AP. After the STA establishes a third communication link with the third AP, the AC can disconnect the first communication link. The following describes this. Figure 3 This is the second process schematic diagram of the wireless communication method provided by the embodiments of the present application. As Figure 3As shown, the wireless communication method includes the following steps.

[0067] In step 301, the AC sends a first control instruction to the first AP.

[0068] The first control instruction includes the identifier of the STA. The embodiments of the present application do not limit the specific format and specific content of the first control instruction.

[0069] In step 302, the first AP deletes the connection information of the STA according to the first control instruction.

[0070] In Figure 2 , the first AP and the second AP belong to the first AP group, and the third AP belongs to the second AP group. A third communication link is established between the third AP and the STA. The first AP is also called the source AP, and the third AP is also called the destination AP. The source AP can perform different processing according to the first control instruction. This is described by way of example below.

[0071] In the first method, the source AP disconnects the first communication link according to the first control instruction and deletes the connection information of the STA. Before the STA roams to the third AP, a first communication link is established between the STA and the first AP, and the connection information of the STA is saved. During the process of the STA roaming to the third AP, or after the STA roams to the third AP, the source AP disconnects the first communication link according to the first control instruction and deletes the connection information of the STA. An AP that is not in the same group as the destination AP is called an other out-of-group AP. The first AP is an other out-of-group AP. When the communication frequencies of the first AP and the third AP are the same, after the other out-of-group AP disconnects the first communication link, if the other out-of-group AP receives a wireless signal from the STA, the other out-of-group AP can normally process the wireless signal of the STA. For example, after the other out-of-group AP successfully parses the wireless signal of the STA, the other out-of-group AP sends an ACK frame to the STA.

[0072] In the second method, the source AP determines whether the first AP group includes redundant resources. When the first AP group includes redundant resources, the source AP does not reply to the wireless signals of the STAs according to the first control instruction. When the first AP group does not include redundant resources, the source AP disconnects the first communication link. For example, when the processor resources, storage resources, or radio frequency resources of the first AP group are less than the threshold, the source AP determines that the first AP group includes non-redundant resources. When the processor resources, storage resources, or radio frequency resources of the first AP group are greater than or equal to the threshold, the source AP determines that the first AP group includes redundant resources. Also, for example, when the number of STAs controlled by the first AP group is greater than or equal to the threshold, the source AP determines that the first AP group includes non-redundant resources. The STAs controlled by the first AP group include virtual users and non-virtual users. A non-virtual user refers to an STA that has established a communication link with the AP. The non-virtual user communicates with the AP through the communication link. For example, the first AP has established virtual users corresponding to 8 STAs and non-virtual users corresponding to 2 STAs. The second AP has established virtual users corresponding to 2 STAs and non-virtual users corresponding to 8 STAs. According to the foregoing Figure 2 description, when an STA has established a communication link with the AP, other APs within the group will establish virtual users corresponding to the STA. Therefore, the non-virtual users corresponding to 8 STAs and the virtual users corresponding to 8 STAs are in one-to-one correspondence, and the non-virtual users corresponding to 2 STAs and the virtual users corresponding to 2 STAs are in one-to-one correspondence. At this time, the number of STAs controlled by the first AP group is equal to the sum of the number of virtual users and the number of non-virtual users. When the number of STAs controlled by the first AP group is less than the threshold, the source AP determines that the first AP group includes redundant resources. Similarly, according to Figure 2 it can be known that other APs within the group can control the wireless signals of the STAs through the virtual user method, and other APs within the group can also control the wireless signals of the STAs according to the MAC address of the STA. Therefore, the STAs controlled by the first AP group can include controlled users and non-virtual users. A controlled user refers to an STA whose wireless communication is controlled by the AP according to the MAC address. At this time, the number of STAs controlled by the first AP group is equal to the sum of the number of controlled users and the number of non-virtual users. Among them, the source AP does not reply to the wireless signals of the STA according to the first control instruction means that the source AP controls the wireless signals of the STA according to the first control instruction. For example, the source AP converts the first communication link into a virtual link, and the source AP controls the wireless signals of the STA by establishing virtual users. Also, for example, the source AP controls the wireless signals of the STA according to the MAC address of the STA.

[0073] In the third method, the source AP retains the first communication link. When the frequencies of the first AP group and the second AP group are different, if the STA includes two radio frequency devices with different frequencies, the STA can be associated with the first AP and the third AP simultaneously. If the STA is associated with the third AP by switching frequencies, the STA can be associated with the first AP by switching frequencies again.

[0074] In step 303, the AC sends a second control instruction to the second AP.

[0075] The AC sends a second control instruction to other APs in the AP group where the source AP is located. The second control instruction includes the identifier of the STA. The embodiments of the present application do not limit the specific format and specific content of the second control instruction.

[0076] In step 304, the second AP deletes the connection information of the STA according to the second control instruction.

[0077] Other APs in the AP group where the source AP is located can perform different processes according to the second control instruction. For example, other APs do not control the wireless signal of the STA according to the second control instruction and delete the relevant information of the STA. Another example is that other APs determine whether the first AP group includes redundant resources. When the first AP group includes redundant resources, other APs do not reply to the wireless signal of the STA according to the second control instruction, that is, other APs continue to control the wireless signal of the STA according to the second control instruction. When the first AP group does not include redundant resources, other APs do not control the wireless signal of the STA according to the second control instruction. For the description of redundant resources, reference can be made to the description of whether the source AP determines whether the first AP group includes redundant resources in the foregoing step 302. For the description of other APs controlling the wireless signal of the STA, reference can be made to the description of Figure 2 step 203 above.

[0078] In Figure 3In the example, multiple APs include a first AP group and a second AP group. The APs in the first AP group can determine whether the first AP group includes redundant resources, and determine whether to control the wireless signals of the STAs based on the redundant resources. In practical applications, multiple APs can also include a third AP group. Regarding the description of whether the APs in the third AP group control the wireless signals of the STAs, reference can be made to the description of the APs in the first AP group controlling the wireless signals of the STAs. For example, the APs in the third AP group can determine whether the third AP group includes redundant resources, and determine whether to control the wireless signals of the STAs based on the redundant resources. When the third AP group includes redundant resources, the APs in the third AP group control the wireless signals of the STAs. When the third AP group does not include redundant resources, the APs in the third AP group do not control the wireless signals of the STAs. The control states of the third AP group and the first AP group for the wireless signals of the STAs can be independent of each other. For example, the APs in the first AP group control the wireless signals of the STAs, and the APs in the third AP group do not control the wireless signals of the STAs.

[0079] According to the previous description, the AC can dynamically update the AP groups. After the AC updates the AP groups, the AP groups may change. The change of the AP groups means that the number of AP groups in the wireless communication system and / or the APs included in the AP groups change. Figure 4 This is the second structural schematic diagram of the wireless communication system provided by the embodiment of the present application. As Figure 4 shown. On the basis of Figure 1 , the AC updates the AP groups. After updating the AP groups, the second AP belongs to the first AP group, and the first AP and the third AP belong to the second AP group. After the AC 101 updates the AP groups, since the source AP and the target AP belong to the same AP group, the AC needs the source AP to control the wireless signals of the STAs. Figure 5 This is the third structural schematic diagram of the wireless communication method provided by the embodiment of the present application. As Figure 5 shown, the wireless communication method includes the following steps.

[0080] In step 501, the AC sends an in-group control instruction to the first AP.

[0081] The AC sends an in-group control instruction to other APs in the AP group where the target AP is located. The in-group control instruction includes the identifier of the STA. In the embodiment of the present application, the description is made by taking other APs including the first AP as an example.

[0082] In step 502, the first AP does not reply to the wireless signals of the STA according to the in-group control instruction.

[0083] As described above Figure 2Similar to the description of step 203, other APs in the AP group where the target AP is located do not reply to the wireless signals of the STA according to the in-group control instructions. That the source AP does not reply to the wireless signals of the STA according to the in-group control instructions means that the source AP controls the wireless signals of the STA according to the in-group control instructions. For example, the source AP converts the first communication link into a virtual link, and the source AP controls the wireless signals of the STA by establishing virtual users. Another example is that the source AP controls the wireless signals of the STA according to the MAC address of the STA. For APs in the second AP group other than the source AP and the destination AP, the in-group control instructions sent by the AC 101 can also include relevant information of the STA. APs in the second AP group other than the source AP and the destination AP do not reply to the wireless signals of the STA according to the relevant information of the STA.

[0084] In step 503, the AC sends a second control instruction to the second AP.

[0085] The AC sends a second control instruction to APs in other AP groups. The second control instruction includes the identifier of the STA. In the embodiments of the present application, the description takes the APs in other AP groups including the second AP as an example.

[0086] In step 504, the second AP deletes the relevant signals of the STA according to the second control instruction.

[0087] Regarding the description of step 504, reference can be made to the description of step 304 Figure 3 above.

[0088] In practical applications, in addition to the first AP, the second AP, and the third AP, the wireless communication system can also include other APs. For example, Figure 4 on this basis, the wireless communication system further includes a fourth AP. The fourth AP belongs to the second AP group. Regarding the description of the AC 101 dividing the fourth AP into the second AP group, reference can be made to the foregoing manner in which the AC 101 divides AP groups. For example, at the moment when the third AP establishes a third communication link with the STA, the AC 101 obtains the fourth signal strength between the STA and the fourth AP. If the fourth signal strength is greater than the threshold, the AC 101 determines that the fourth AP belongs to the second AP group. If the fourth signal strength is less than or equal to the threshold, the AC 101 determines that the fourth AP belongs to the first AP group. Another example is that if the fourth AP and the third AP use the same wireless communication frequency, the AC 101 determines that the fourth AP belongs to the second AP group. If the fourth AP and the third AP use different wireless communication frequencies, and the fourth AP and the first AP use the same wireless communication frequency, the AC 101 determines that the fourth AP belongs to the first AP group. Figure 6 This is the third structural schematic diagram of the wireless communication system provided by the embodiments of the present application. As Figure 6 shown, in Figure 4Based on this, the second AP group further includes a fourth AP. Taking the Figure 6 wireless communication system in Figure 7 as an example, the wireless communication method provided in the embodiments of the present application will be described. Figure 7 As shown, the wireless communication method includes the following steps.

[0089] In step 701, the AC sends an in-group control instruction to the fourth AP.

[0090] The AC sends an in-group control instruction to other APs in the AP group where the target AP is located. The in-group control instruction includes relevant information of the STA. In the embodiments of the present application, the case where other APs include the fourth AP is taken as an example for description.

[0091] In step 702, the fourth AP does not reply to the wireless signal of the STA according to the in-group control instruction.

[0092] For the description of step 702, reference can be made to the description of Figure 5 step 502 above.

[0093] In step 703, the AC sends a fourth control instruction to the fourth AP.

[0094] The AC 101 determines whether the STA needs to communicate with the fourth AP. After the AC 101 determines that the STA needs to communicate with the fourth AP, the AC 101 sends a fourth control instruction to the fourth AP. After the AC 101 determines that the STA does not need to communicate with the fourth AP, the AC 101 does not send a fourth control instruction to the fourth AP. For the description of how the AC 101 determines whether the STA needs to communicate with the fourth AP, reference can be made to the description of Figure 2 how the AC determines whether the STA needs to communicate with the third AP above. The fourth control instruction includes the identifier of the STA.

[0095] In step 704, the fourth AP associates with the STA according to the fourth control instruction.

[0096] After the fourth AP obtains the fourth control instruction from the AC 101, the fourth AP establishes a fourth communication link with the STA through the fourth control instruction, that is, the fourth AP associates with the STA. In the aforementioned step 702, the fourth AP does not reply to the wireless signal of the STA according to the relevant information of the STA. The relevant information of the STA can be the MAC address of the STA or the connection information of the STA. When the relevant information of the STA is the connection information of the STA, the fourth AP controls the wireless signal of the STA by creating a virtual user, that is, the fourth AP does not reply to the wireless signal of the STA. After receiving the fourth control instruction, the fourth AP can convert the virtual user corresponding to the STA into a non-virtual user, that is, convert the virtual link corresponding to the STA into a non-virtual link. After the fourth AP receives the wireless signal of the STA, the fourth AP replies to the wireless signal of the STA. When the relevant information of the STA is the MAC address of the STA, the fourth AP establishes a fourth communication link with the STA according to the connection information of the STA.

[0097] The fourth AP and the third AP include the same BSSID. The STA can roam from the third AP to the fourth AP without awareness. After the STA roams to the fourth AP, the STA connects to the network through the fourth AP, that is, the STA transmits the uplink signal through the fourth AP and receives the downlink signal from the fourth AP. Before and after the STA roams, the wireless signals sent by the STA use the same BSSID as the destination address, that is, the third wireless signal sent by the STA to the third AP and the third wireless signal sent by the STA to the fourth AP include the same BSSID.

[0098] In step 705, the AC sends a third control instruction to the third AP.

[0099] In step 706, the third AP does not reply to the wireless signal of the STA according to the third control instruction.

[0100] Regarding the description of step 706, reference can be made to the description of step 502 in the foregoing Figure 5 above.

[0101] In Figure 7 the example, before and after the STA roams from the third AP to the fourth AP, the third AP and the fourth AP belong to the same AP group. At this time, the STA roams from one AP to another AP by means of intra-group roaming. At this time, the fourth control instruction is also called an intra-group roaming instruction. In Figure 2 the example, before and after the STA roams from the first AP to the third AP, the third AP and the first AP belong to different AP groups. At this time, the STA roams from one AP to another AP by means of cross-group roaming. In Figure 1In the example, the first AP and the second AP belong to the same AP group. Therefore, in practical applications, the STA can also roam from the first AP to the second AP through intra-group roaming. The description of the STA roaming from the first AP to the second AP is similar to the description of the STA roaming from the third AP to the fourth AP. Therefore, the description of the STA roaming from the first AP to the second AP can refer to the description of the STA roaming from the third AP to the fourth AP.

[0102] According to Figure 3 the description, except for the AP group where the target AP is located, other AP groups can control the wireless signal of the STA according to whether they include redundant resources. Therefore, in the foregoing Figure 2 , Figure 3 or Figure 5 example, before the STA roams from the first AP to the third AP, the second AP group can also control the wireless signal of the STA according to whether it includes redundant resources. When the second AP group includes redundant resources, the APs in the second AP group control the wireless signal of the STA. When the second AP group does not include redundant resources, the APs in the second AP group do not control the wireless signal of the STA. After the AC determines that the STA needs to communicate with the third AP, if the number of STAs controlled by the second AP group is greater than or equal to the threshold, the APs in the second AP group are also used to delete the relevant information of another STA, that is, to release the control of the wireless signal of another STA. Before deleting the relevant information of another STA, the APs in the second AP group do not reply to the wireless signal from another STA. To avoid communication chaos, another STA is a controlled user or virtual user of all APs in the second AP group.

[0103] The wireless communication system and wireless communication method provided by the embodiments of the present application are described above. Next, the AC provided by the embodiments of the present application is described. Figure 8 This is the first structural schematic diagram of the AC provided by the embodiments of the present application. As Figure 8 shown, the AC 101 includes a first sending unit 801 and a second sending unit 802. The first sending unit 801 is used to send a second control instruction to the second AP among multiple APs. The second control instruction includes the relevant information of the STA. The multiple APs include a first AP, a second AP, and a third AP. A first communication link is established between the first AP and the STA. The second control instruction is used for the second AP not to reply to the wireless signal of the STA according to the second control instruction. After determining that the STA needs to communicate with the third AP. The second sending unit 802 is used to send the connection information of the STA to the third AP. The connection information of the STA is used for the third AP to establish a third communication link with the STA according to the connection information of the STA.

[0104] It should be understood that the description of the AC 101 in Figure 8 and the foregoing Figure 2, Figure 3 , Figure 5 or Figure 7 The description of the wireless communication method in any one of the figures is similar. Therefore, regarding Figure 8 the description of AC 101 in Figure 2 , Figure 3 , Figure 5 or Figure 7 the description of the wireless communication method in any one of the figures can be referred to. For example, the first sending unit is further configured to send a first control instruction to the first AP, the first control instruction includes the identifier of the STA, and the first control instruction is used for the first AP to disconnect the first communication link according to the first control instruction. Another example is that the multiple APs include a first AP group and a second AP group. The first AP group includes the first AP and the second AP, and the second AP group includes the third AP. The wireless communication frequencies of the first AP group and the second AP group are different. The wireless communication frequencies of the APs in the same AP group are the same.

[0105] Figure 9 This is the second structural schematic diagram of the AC provided by the embodiment of the present application. As Figure 9 shown, the AC 101 includes a transceiver 901 and a processor 902. The transceiver 901 is a radio frequency device. The processor 902 can be a central processing unit (CPU), a network processor (NP), a graphics processor, or a combination of a CPU and an NP. The processor 902 can further include a hardware chip or other general-purpose processors. The above hardware chip can be an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The processor 902 is configured to obtain the connection information of the STA, and control the transceiver 901 to send a second control instruction to the second AP among the multiple APs. The second control instruction includes the relevant information of the STA. The multiple APs include the first AP, the second AP, and the third AP. The first AP and the STA have established a first communication link. The second control instruction is used for the second AP not to reply to the wireless signal of the STA according to the second control instruction. After determining that the STA needs to communicate with the third AP, the processor 902 is further configured to control the transceiver 901 to send the connection information of the STA to the third AP, and the connection information of the STA is used for the third AP to establish a third communication link with the STA according to the connection information of the STA.

[0106] It should be understood that the description of AC 101 in Figure 9 and the foregoing Figure 2 , Figure 3 , Figure 5 or Figure 7The descriptions of the wireless communication method in any of the figures are similar. Therefore, regarding Figure 9 the description of the AC 101 in Figure 2 , Figure 3 , Figure 5 or Figure 7 the description of the wireless communication method in any of the figures can be referred to. For example, the processor 902 is further configured to control the transceiver 901 to send a first management instruction to the first AP. The first management instruction includes the identifier of the STA, and the first management instruction is used for the first AP to disconnect the first communication link according to the first management instruction. Another example is that the multiple APs include a first AP group and a second AP group. The first AP group includes the first AP and the second AP, and the second AP group includes the third AP. The wireless communication frequencies of the first AP group and the second AP group are different. The wireless communication frequencies of the APs in the same AP group are the same.

[0107] In other embodiments, the AC 101 may further include a memory. The memory can be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable ROM (PROM), an erasable programmable ROM (EPROM), or a flash memory, etc. The volatile memory can be a random access memory (RAM). The memory 702 can be used to store the connection information of the STA.

[0108] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered within the protection scope of the present application.

Claims

1. A wireless communication system, characterized in that, it includes a plurality of access points AP, wherein: the plurality of APs include a first AP, a second AP, and a third AP, the plurality of APs have the same basic service set identifier BSSID, and a first communication link is established between the first AP and a station STA; an access controller AC for managing the plurality of APs is configured to send a second control instruction to the second AP, and the second control instruction includes relevant information of the STA; the second AP is configured not to reply to the wireless signal of the STA according to the second control instruction; after determining that the STA needs to communicate with the third AP, the AC is further configured to send connection information of the STA to the third AP; the third AP is configured to establish a third communication link with the STA according to the connection information of the STA.

2. The wireless communication system according to claim 1, characterized in that, the first communication link and the third communication link have the same frequency; the AC is further configured to send a first control instruction to the first AP, and the first control instruction includes an identifier of the STA; the first AP is configured to disconnect the first communication link according to the first control instruction.

3. The wireless communication system according to claim 2, characterized in that, the first AP is further configured not to reply to the wireless signal of the STA according to the first control instruction.

4. The wireless communication system according to claim 1, characterized in that, the first AP and the second AP have the same wireless communication frequency, and the first AP and the third AP have different wireless communication frequencies.

5. The wireless communication system according to any one of claims 1 to 4, characterized in that, before the third AP and the STA establish a third communication link, the third AP is further configured to delete relevant information of another STA, and before deleting the relevant information of the another STA, the third AP does not reply to the wireless signal from the another STA.

6. The wireless communication system according to any one of claims 1 to 5, characterized in that, the plurality of APs further include a fourth AP; after the third AP and the STA establish a third communication link, if the signal strength between the STA and the fourth AP is greater than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP, and the fourth control instruction includes relevant information of the STA; the fourth AP is configured not to reply to the wireless signal of the STA according to the fourth control instruction.

7. The wireless communication system according to any one of claims 1 to 5, characterized in that, after the third AP and the STA establish a third communication link, if the number of STAs controlled by the fourth AP is less than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP, and the fourth control instruction includes relevant information of the STA; the fourth AP is configured not to reply to the wireless signal of the STA according to the fourth control instruction.

8. The wireless communication system according to claim 6 or 7, characterized in that, The relevant information of the STA is the media access control (MAC) address of the STA; The AC is further configured to send an intra-group roaming instruction to the fourth AP, where the intra-group roaming instruction includes the connection information of the STA; The fourth AP is further configured to establish a fourth communication link with the STA according to the connection information of the STA; The AC is further configured to send a third control instruction to the third AP, where the third control instruction includes the identifier of the STA; The third AP is further configured to disconnect the third communication link according to the third control instruction and not reply to the wireless signal of the STA.

9. The wireless communication system according to claim 6 or 7, characterized in that the relevant information of the STA is the connection information of the STA; The AC is further configured to send an intra-group roaming instruction to the fourth AP, where the intra-group roaming instruction includes the identifier of the STA; The fourth AP is further configured to reply to the wireless signal of the STA according to the intra-group roaming instruction; The AC is further configured to send a third control instruction to the third AP, where the third control instruction includes the identifier of the STA; The third AP is further configured to disconnect the third communication link according to the third control instruction and not reply to the wireless signal of the STA.

10. A wireless communication method, characterized in that it includes: An access controller (AC) sends a second control instruction to a second access point (AP) among a plurality of APs, where the second control instruction includes the relevant information of a station (STA). The plurality of APs include a first AP, the second AP, and a third AP. A first communication link is established between the first AP and the STA. The second control instruction is used for the second AP not to reply to the wireless signal of the STA according to the second control instruction; After determining that the STA needs to communicate with the third AP, the AC sends the connection information of the STA to the third AP, and the connection information of the STA is used for the third AP to establish a third communication link with the STA according to the connection information of the STA.

11. The wireless communication method according to claim 10, characterized in that the method further includes: The AC sends a first control instruction to the first AP, where the first control instruction includes the identifier of the STA, and the first control instruction is used for the first AP to disconnect the first communication link according to the first control instruction.

12. The wireless communication method according to claim 11, characterized in that the first control instruction is used for the first AP not to reply to the wireless signal of the STA.

13. The wireless communication method according to claim 10, characterized in that the wireless communication frequencies of the first AP and the second AP are the same, and the wireless communication frequencies of the first AP and the third AP are different.

14. The wireless communication method according to any one of claims 10 to 13, characterized in that the plurality of APs further include a fourth AP, and the method further includes: After the third AP establishes a third communication link with the STA, if the signal strength between the STA and the fourth AP is greater than a threshold, the AC sends a fourth control instruction to the fourth AP. The fourth control instruction includes relevant information of the STA, and the fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

15. The wireless communication method according to any one of claims 10 to 13, wherein, the method further includes: After the third AP establishes a third communication link with the STA, if the number of STAs controlled by the fourth AP is less than a threshold, the AC is further configured to send a fourth control instruction to the fourth AP. The fourth control instruction includes relevant information of the STA, and the fourth control instruction is used for the fourth AP not to reply to the wireless signal of the STA according to the fourth control instruction.

16. The wireless communication method according to claim 14 or 15, wherein, the relevant information of the STA is the media access control (MAC) address of the STA, and the method further includes: The AC sends an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes connection information of the STA, and the intra-group roaming instruction is used for the fourth AP to establish a fourth communication link with the STA according to the connection information of the STA; The AC also sends a third control instruction to the third AP. The third control instruction includes an identifier of the STA, and the third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not reply to the wireless signal of the STA.

17. The wireless communication method according to claim 14 or 15, wherein, the relevant information of the STA is the connection information of the STA, and the method further includes: The AC sends an intra-group roaming instruction to the fourth AP. The intra-group roaming instruction includes an identifier of the STA, and the intra-group roaming instruction is used for the fourth AP to reply to the wireless signal of the STA according to the intra-group roaming instruction; The AC also sends a third control instruction to the third AP. The third control instruction includes an identifier of the STA, and the third control instruction is used for the third AP to disconnect the third communication link according to the third control instruction and not reply to the wireless signal of the STA.

18. An access controller (AC), wherein, comprising a processor and a transceiver, the processor is configured to obtain connection information of a STA and control the transceiver to execute the method according to any one of claims 10 to 17.

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