WO2023051268A1

WO2023051268A1 - Terminal control method, apparatus and system

Info

Publication number: WO2023051268A1
Application number: PCT/CN2022/119089
Authority: WO
Inventors: 李苗; 司小书; 陈云曼
Original assignee: 华为技术有限公司
Priority date: 2021-09-29
Filing date: 2022-09-15
Publication date: 2023-04-06
Also published as: CN115884098A

Abstract

Disclosed are a terminal control method, an apparatus and a system, belonging to the field of communication technology. The method is applied to a first AP in a single BSSID system, and the single BSSID system includes: a terminal and a plurality of APs, where the first AP is any one of the plurality of APs; the method includes: when it is determined that the first AP is not the serving AP for providing service to the terminal, the first AP broadcasts a first energy-saving indication, and the first energy-saving indication is used to indicate that the terminal is prohibited from entering an energy-saving mode. When the terminal has not entered an energy-saving mode, if a first energy-saving indication corresponding to the terminal and broadcast by the non-serving AP is received, because the first energy-saving indication is used to indicate that the terminal is prohibited from entering the energy-saving mode, the terminal thus does not enter the energy-saving mode under the indication of the non-serving AP thereof, thereby avoiding packet loss by the terminal. The present application is used for controlling a terminal.

Description

Terminal control method, device and system

This application claims the priority of the Chinese patent application with the application number 202111152353.X and the application name "terminal control method, device and system" filed on September 29, 2021, the entire content of which is incorporated in this application by reference.

technical field

The present application relates to the technical field of communications, and in particular to a terminal control method, device and system.

Background technique

A single basic service set identifier (BSSID) system is a communication system, and a single BSSID system includes a terminal and multiple access points (access points, APs), and these APs have the same BSSID. Among these APs, there are serving APs for providing services for terminals, and non-serving APs except serving APs. The services provided by the serving AP to the terminal include, for example, the AP sends information to the terminal, and the AP receives information sent by the terminal.

At present, each AP in the single-BSSID system can broadcast the energy-saving indication corresponding to the terminal in the single-BSSID system, and the energy-saving indication corresponding to the terminal is used to indicate whether the terminal enters the energy-saving mode. The terminal is aligned with the time stamp of its serving AP, so that the terminal can receive the energy-saving instruction broadcast by its serving AP corresponding to the terminal, and enter the energy-saving mode according to the energy-saving instruction, or not enter the energy-saving mode. Wherein, for each AP in the single BSSID system, when the unicast frame to be sent to the terminal is buffered in the AP, the energy-saving instruction corresponding to the terminal broadcast by the AP is used to instruct the terminal to prohibit entering the energy-saving mode, so that the AP Sending a unicast frame to the terminal; when the unicast frame is not buffered in the AP, the energy saving indication corresponding to the terminal broadcast by the AP is used to instruct the terminal to enter the energy saving mode.

However, when the terminal does not enter the energy saving mode, it may receive an energy saving instruction corresponding to the terminal broadcast by its non-serving AP. Since the energy-saving indication is used to instruct the terminal to enter the energy-saving mode, the terminal enters the energy-saving mode according to the energy-saving indication. After the terminal enters the energy-saving mode, it will no longer receive information. At this time, the terminal may not be able to receive the energy-saving instruction broadcast by the serving AP corresponding to the terminal. As a result, the terminal cannot receive the unicast frame sent by the serving AP, and the terminal may lose packets.

Contents of the invention

This application provides a terminal control method, device and system, which can solve the problem of terminal packet loss. The technical solution is as follows:

In the first aspect, a terminal control method is provided, the method is used for a first AP in a single BSSID system, the single BSSID system includes: the terminal and multiple APs, the first AP is the multiple Any one of the APs; the method includes: when the first AP determines that the first AP is not a serving AP for providing services to the terminal, the first AP broadcasts a first energy-saving indication, The first energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode.

When the terminal does not enter the energy-saving mode, if it receives the first energy-saving indication corresponding to the terminal broadcast by the non-serving AP, since the first energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode, the terminal will not Enter the energy saving mode under the direction of the AP. When the serving AP of the terminal broadcasts the second energy-saving instruction next time, the terminal can always receive the second energy-saving instruction, so that the terminal can always be synchronized with its serving AP timestamp, preventing the terminal from being unable to receive the unicast frame sent by the serving AP, Avoid terminal packet loss.

Moreover, when the serving AP of the terminal is handed over, it is assumed that the terminal is synchronized with the time stamp of the serving AP before the handover, and the terminal is not synchronized with the time stamp of the serving AP after the handover. Since the serving AP before the handover becomes the non-serving AP after the handover, the energy-saving indication corresponding to the terminal broadcast by the non-serving AP after the handover is used to instruct the terminal to prohibit entering the energy-saving mode. The terminal can be prohibited from entering the energy-saving mode according to the energy-saving instruction until the terminal receives the energy-saving instruction corresponding to the terminal broadcast by the switched serving AP, so as to realize the time stamp synchronization between the terminal and the switched serving AP, and avoid terminal packet loss.

Optionally, the first AP needs to determine the first energy saving indication before broadcasting the first energy saving indication. There are various manners for the first AP to determine the first energy saving indication. In an optional manner in which the first AP determines the first energy saving indication, the first AP may also obtain the second energy saving indication before broadcasting the first energy saving indication. The second energy saving indication is an energy saving indication broadcast by the serving AP. When the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode; or, when the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the The second energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode.

There are various ways for the first AP to obtain the second energy saving indication. For example, the first AP may receive the second energy saving indication sent by the current serving AP, so as to obtain the second energy saving indication. Alternatively, the current serving AP may send the second energy saving instruction that it needs to broadcast to the controller, and then the controller sends the second energy saving instruction to the first AP, so that the first AP obtains the second energy saving instruction.

After receiving the second energy saving indication sent by the serving AP of the terminal, the controller may send the second energy saving indication (for example, the PVB field carrying the second energy saving indication) to other APs in the single BSSID system except AP2 (The non-serving AP of the terminal, such as the first AP). Optionally, the controller may also send the second energy saving instruction to the serving AP of the terminal. At this time, when the controller sends the second energy saving instruction, it is not necessary to distinguish the serving AP and the non-serving AP of the terminal, but the second The energy saving instruction is sent to all APs in the single BSSID system, which simplifies the logic for the controller to send the second energy saving instruction. It can be seen that the controller may send the second energy saving instruction to at least some APs in the single BSSID system, and the at least some APs include non-serving APs of the terminal, and further, the at least some APs may also include serving APs of the terminal.

There are various manners for the first AP to broadcast the first energy saving indication.

In an optional manner in which the first AP broadcasts the first energy saving indication, the first AP may directly broadcast the first energy saving indication.

In another optional manner in which the first AP broadcasts the first energy saving indication, the first AP may broadcast the first energy saving indication by broadcasting a first beacon frame, where the first beacon frame includes the first energy saving indication.

Optionally, the first energy saving indication may be carried by a PVB field in the first beacon frame. For example, the PVB field includes bits corresponding to the AID of the terminal, and the bits may be used to carry the first energy saving indication.

Optionally, before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the first AP may receive a service indication sent by the controller, and the service indication is used to indicate whether the first AP is a serving AP ; When determining whether the first AP is the serving AP, the first AP may determine whether the first AP is the serving AP according to the service indication. Of course, the first AP may not determine whether the first AP is the serving AP based on the service indication. For example, the staff can configure information on whether the first AP is the serving AP on the first AP, and the first AP can determine the Whether the first AP is a serving AP.

Optionally, when the first AP determines that the first AP is a serving AP, the first AP may send an energy saving indication to the controller (similar to the serving AP sending the second energy saving indication to the controller); - Whether the AP requires the terminal to enter the energy-saving mode.

In a second aspect, a terminal control method is provided, the method is used for a controller in a single BSSID system, and the single BSSID system further includes: the terminal and multiple access points AP; the method includes: the After receiving the energy saving instruction sent by the serving AP, the controller sends the energy saving instruction to at least some of the multiple APs. Wherein, the serving AP is an AP used to provide services to the terminal among the plurality of APs, and the energy saving indication is used to indicate whether the serving AP requires the terminal to enter an energy saving mode; the at least some APs include APs in the plurality of APs other than the serving AP.

Optionally, the at least some APs further include the serving AP. At this time, when the controller sends the energy-saving instruction, it does not need to distinguish the serving AP and the non-serving AP of the terminal, but sends the energy-saving instruction to all APs in the single BSSID system, which simplifies the logic for the controller to send the second energy-saving instruction.

In a third aspect, a terminal control system is provided, the system includes: a terminal and multiple access points AP; the system includes: a first AP, and the first AP is any one of the multiple APs AP. The first AP is configured to broadcast a first energy-saving indication when it is determined that the first AP is not a serving AP for providing services to the terminal, and the first energy-saving indication is used to instruct the terminal to prohibit entering an energy-saving mode ; The terminal is configured to enter the energy-saving mode or not enter the energy-saving mode according to the received energy-saving instruction.

Before broadcasting the first energy saving indication, the first AP needs to determine the first energy saving indication. There are various manners for the first AP to determine the first energy saving indication. In an optional manner for the first AP to determine the first energy saving indication, the serving AP among the plurality of APs is used to broadcast the second energy saving indication, and the first AP is also used to broadcast the second energy saving indication when the first AP is not serving During the AP, before broadcasting the first energy saving indication, acquire the second energy saving indication. When the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode; or, when the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the The second energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode.

There are various ways for the first AP to obtain the second energy saving indication. For example, the current serving AP is further configured to send the second energy saving indication to the first AP, so that the first AP obtains the second energy saving indication. Alternatively, the current serving AP is further configured to send the second energy-saving indication that it needs to broadcast to the controller; the controller is configured to send the second energy-saving indication to the first AP, so that the first AP obtains the second energy-saving indication.

In an optional manner in which the first AP broadcasts the first energy saving indication, the first AP is used to directly broadcast the first energy saving indication.

In another optional manner in which the first AP broadcasts the first energy saving indication, the first AP broadcasts the first energy saving indication by broadcasting a first beacon frame, where the first beacon frame includes the first energy saving indication.

Optionally, before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the first AP is further configured to receive a service indication sent by the controller, where the service indication is used to indicate whether the first AP is Serving AP; the first AP may be used to determine whether the first AP is a serving AP according to the service indication. Of course, the first AP may not determine whether the first AP is the serving AP based on the service indication. For example, the staff can configure information on whether the first AP is the serving AP on the first AP, and the first AP can determine the Whether the first AP is a serving AP.

Optionally, the first AP is further configured to send an energy saving indication to the controller when it is determined that the first AP is a serving AP (similar to the serving AP sending the second energy saving indication to the controller); the energy saving indication is used to indicate the first Whether the AP requires the terminal to enter the energy-saving mode.

In a fourth aspect, a first AP is provided, the first AP belongs to a single BSSID system, the single BSSID system includes: the terminal and multiple APs, the first AP is one of the multiple APs Any AP; the first AP includes: a determination module and a broadcast module. Wherein, the determining module is used to determine whether the first AP is a serving AP for providing services to the terminal; the broadcasting module is used to broadcast a first energy saving indication when the first AP is not a serving AP, and the first AP An energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode.

Before broadcasting the first energy saving indication, the first AP needs to determine the first energy saving indication. There are various manners for the first AP to determine the first energy saving indication. In an optional manner in which the first AP determines the first energy saving indication, the first AP further includes: an acquisition module configured to broadcast the first energy saving indication on the first AP when the first AP is not a serving AP. Before the energy-saving indication, obtain a second energy-saving indication; the second energy-saving indication is an energy-saving indication broadcast by the serving AP; the second energy-saving indication is used to instruct the terminal to enter an energy-saving mode; or, the second energy-saving indication It is used to instruct the terminal to prohibit entering the energy-saving mode.

There are various ways for the obtaining module to obtain the second energy saving indication. For example, the first AP may receive the second energy saving indication sent by the current serving AP, so that the acquiring module acquires the second energy saving indication. Alternatively, the current serving AP may send the second energy-saving instruction that it needs to broadcast to the controller, and then the controller sends the second energy-saving instruction to the first AP, so that the obtaining module acquires the second energy-saving instruction.

There are various ways for the broadcast module to broadcast the first energy-saving instruction.

In an optional manner in which the broadcast module broadcasts the first energy saving instruction, the broadcast module may directly broadcast the first energy saving instruction.

In another optional manner in which the broadcast module broadcasts the first energy-saving indication, the broadcast module may broadcast the first energy-saving indication by broadcasting a first beacon frame, where the first beacon frame includes the first energy-saving indication.

Optionally, the single BSSID system further includes a controller, and the first AP further includes: a receiving module. a receiving module, configured to receive a service indication sent by the controller before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the service indication is used to indicate the Whether the first AP is a serving AP; the determining module is configured to determine whether the first AP is a serving AP according to the service indication. Of course, the first AP may not determine whether the first AP is the serving AP based on the service indication. For example, the staff can configure information on whether the first AP is the serving AP on the first AP, and the first AP can determine the Whether the first AP is a serving AP.

Optionally, the single-BSSID system further includes a controller, and the first AP further includes: a sending module, configured to send an energy-saving indication to the controller when the first AP is a serving AP (similar to the above-mentioned service The AP sends the second energy saving indication to the controller); the energy saving indication is used to indicate whether the first AP requires the terminal to enter the energy saving mode.

In a fifth aspect, a controller is provided, the controller belongs to a single BSSID system, and the single BSSID system further includes: the terminal and multiple access points AP; the controller includes: a receiving module and a sending module . A receiving module, configured to receive an energy saving indication sent by a serving AP, where the serving AP is an AP providing services to the terminal among the plurality of APs, and the energy saving indication is used to indicate whether the serving AP requires the The terminal enters an energy-saving mode; a sending module, configured to send the energy-saving indication to at least some APs in the multiple APs, and the at least some APs include APs in the multiple APs except the serving AP.

Optionally, the at least some APs further include the serving AP.

In a sixth aspect, a first AP is provided, and the first AP includes: a processor and a memory; the processor is used to execute a program stored in the memory, so as to implement any design described in the first aspect. Terminal control method.

In a seventh aspect, there is provided a controller, the controller includes: a processor and a memory; the processor is used to execute the program stored in the memory, so as to realize the terminal control described in any design in the second aspect method.

In an eighth aspect, a computer-readable storage medium is provided. Instructions are stored in the computer-readable storage medium. When the instructions are run on a computer, the computer executes any one of the first aspect or the second aspect. Design the terminal control method.

In a ninth aspect, a computer program product containing instructions is provided, and when the computer program product is run on a computer, the computer is made to execute the terminal control method according to any design of the first aspect or the second aspect.

For the technical effect brought by any one of the design methods from the second aspect to the ninth aspect, please refer to the technical effect brought by the corresponding design method in the first aspect, and details will not be repeated here.

Description of drawings

FIG. 1 is a schematic diagram of a single BSSID system provided by an embodiment of the present application;

FIG. 2 is a schematic diagram of another single BSSID system provided by the embodiment of the present application;

FIG. 3 is a schematic diagram of a beacon frame provided by an embodiment of the present application;

FIG. 4 is a schematic diagram of a bitmap control field and a PVB field provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of an energy-saving indication provided by an embodiment of the present application;

FIG. 6 is a schematic diagram of another energy-saving indication provided by an embodiment of the present application;

FIG. 7 is a flow chart of a terminal control method provided in an embodiment of the present application;

FIG. 8 is a schematic diagram of another energy-saving indication provided by an embodiment of the present application;

FIG. 9 is a flowchart of another terminal control method provided in an embodiment of the present application;

FIG. 10 is a schematic diagram of another energy-saving indication provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of another energy-saving indication provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of another energy-saving indication provided by an embodiment of the present application;

FIG. 13 is a block diagram of a first AP provided in an embodiment of the present application;

FIG. 14 is a block diagram of a controller provided by an embodiment of the present application;

FIG. 15 is a schematic structural diagram of a terminal control device provided by an embodiment of the present application.

Detailed ways

In order to make the principles and technical solutions of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

The single-BSSID system is also called single-BSSID networking. The single-BSSID system is an important network architecture in the communication standard Wi-Fi 7, and it is also the networking architecture used in the Wi-Fi zero roaming technology. A single BSSID system includes: one or more terminals, and multiple APs, and these APs have the same BSSID. The terminal is also called a station (station, STA), and the terminal can be a mobile phone, a computer, a tablet computer, and other devices; an AP can be a router, a gateway, and other devices. Exemplarily, Fig. 1 and Fig. 2 are both schematic structural diagrams of a single BSSID system provided by an embodiment of the present application. As shown in Fig. 1, the single BSSID system includes multiple APs and multiple terminals. As shown in Fig. 2, the single BSSID system The BSSID system includes terminals, AP1 and AP2.

An AP can provide services to terminals within its service area (as shown in FIG. 1 ). For each terminal in the single-BSSID system, the multiple APs include the terminal's serving AP and non-serving APs other than the serving AP. Wherein, the serving AP is used to provide services to the terminal, and the non-serving AP is not used to provide services to the terminal. Here, the service provided by the AP to the terminal means that the terminal accesses the AP, and the AP performs data interaction with the terminal, for example, the AP sends information to the terminal, and/or the AP receives information sent by the terminal.

In addition, for each terminal in the single BSSID system, the serving AP of the terminal can also be switched between the above-mentioned multiple APs (also called roaming of the terminal), and the terminal has no perception during the process of switching the serving AP, realizing terminal Seamless switching of data streams.

For example, the terminal and the serving AP can communicate through the same BSSID configured by each AP in the single-BSSID system. The terminal provides services. When the serving AP of the terminal is switched between multiple APs, the serving AP before switching does not need to receive the data frames sent by the terminal, and does not need to provide services to the terminal; while the serving AP after switching needs to receive the data frames sent by the terminal to realize the switching The subsequent service AP provides services to the terminal. In this way, during this process, the terminal only needs to communicate with the serving AP through the BSSID, so the terminal has no perception of the switching of the serving AP.

Further, the terminal in the single BSSID system can also enter the energy saving mode according to the instruction of the AP, so as to realize the energy saving of the terminal.

For example, the AP in the single BSSID system may periodically broadcast the energy saving indication, and the periods for different APs to broadcast the energy saving indication may be the same or different. For the energy-saving indication corresponding to a terminal, the energy-saving indication is used to instruct the terminal to enter the energy-saving mode, or to prohibit entering the energy-saving mode. The terminal may enter the energy saving mode or not enter the energy saving mode according to the received energy saving instruction corresponding to the terminal. Moreover, when the terminal does not enter the energy-saving mode, the terminal will send and receive information; after entering the energy-saving mode, the terminal will no longer send and receive information.

Regardless of whether the serving AP of the terminal is switched, the terminal has a serving AP and a non-serving AP at any time.

For the terminal's serving AP, when the serving AP buffers unicast frames that need to be sent to the terminal, the serving AP broadcasts an energy-saving indication corresponding to the terminal to instruct the terminal to prohibit entering the energy-saving mode. The terminal will not enter the energy saving mode according to the energy saving indication. After the serving AP broadcasts the energy-saving instruction, it will send the above-mentioned unicast frame to the terminal, and the terminal will receive the unicast frame at this time.

When there is no unicast frame buffered in the serving AP that needs to be sent to the terminal, the energy saving indication corresponding to the terminal broadcast by the serving AP is used to instruct the terminal to enter the energy saving mode. The terminal will enter the energy saving mode according to the energy saving indication.

For the non-serving AP of the terminal, since the non-serving AP does not need to communicate with the terminal, the energy-saving indication corresponding to the terminal broadcast by the non-serving AP is used to instruct the terminal to enter the energy-saving mode. The terminal will enter the energy saving mode according to the energy saving indication.

It can be seen that for each AP, the AP will broadcast the corresponding energy-saving indication of the terminal. If the AP is the serving AP of the terminal, then the corresponding energy-saving indication of the terminal and whether there is a unicast message that needs to be sent to the terminal is buffered in the serving AP. Frame correlation; if the AP is a non-serving AP of the terminal, then the energy saving indication corresponding to the terminal is used to instruct the terminal to enter the energy saving mode.

Exemplarily, taking the single BSSID system shown in FIG. 2 as an example, it is assumed that the serving AP of the terminal is AP2, and at this time, AP1 is the non-serving AP of the terminal. When AP2 caches unicast frames that need to be sent to the terminal, the energy-saving indication corresponding to the terminal broadcast by AP2 is used to instruct the terminal to prohibit entering the energy-saving mode; when AP2 does not cache unicast frames that need to be sent to the terminal frame time, the energy-saving indication corresponding to the terminal broadcast by AP2 is used to instruct the terminal to enter the energy-saving mode; the energy-saving indication corresponding to the terminal broadcast by AP1 is used to instruct the terminal to enter the energy-saving mode.

Further, the AP may broadcast the energy saving indication corresponding to the terminal in a manner of broadcasting a beacon (beacon) frame, where the beacon frame carries the energy saving indication corresponding to the terminal.

Exemplarily, the structure of the beacon frame is shown in Figure 3, the beacon frame includes a unit identifier (element ID) field, a length (length) field, and a delivery traffic indication message count (delivery traffic indication message count, DTIM count) field, delivery traffic indication message period (DTIM period) field, bitmap control (bitmap control) field and partial virtual bitmap (partial virtual bitmap, PVB) field. Among them, the unit identifier field, the length field, the transmission flow indication message quantity field, the transmission flow indication message period field and the bitmap control field all include 1 byte, and the PVB field includes 1 to 251 bytes.

Referring to FIG. 4 , one byte of the bitmap control field may include 8 bits B, and each byte of 1-251 bytes in the PVB field also includes 8 bits B. Wherein, the first bit B of the bitmap control field is used to indicate whether there is an AP buffering a unicast frame that needs to be sent to the terminal in the single BSSID system. The 2nd to 7th bits B of the bitmap control field are used to indicate the association identifier (association identifier, AID) corresponding to the first bit B in the PVB field. It should be noted that each bit B in the PVB field has a corresponding AID, and different bits B correspond to different AIDs. The AID is used to identify a terminal in the single-BSSID system, and the bit B corresponding to the AID used to identify a terminal in the PVB field is used to carry the energy-saving indication corresponding to the terminal. For example, for a terminal, if the bit B corresponding to the AID used to identify the terminal in the PVB field is 0, it means that the energy saving indication corresponding to the terminal in the PVB field is used to instruct the terminal to enter the energy saving mode; if the PVB field If the bit B corresponding to the AID used to identify the terminal is 1, it means that the energy-saving indication corresponding to the terminal in the PVB field is used to indicate that the terminal is prohibited from entering the energy-saving mode.

For a terminal in a single-BSSID system, the terminal is usually synchronized with its serving AP timestamp, so that the terminal can receive the energy-saving indication broadcast by its serving AP corresponding to the terminal, and then enter the energy-saving mode according to the energy-saving indication, or not enter the energy-saving mode. After one cycle of the serving AP broadcasting the energy saving indication, the terminal will receive the corresponding energy saving indication broadcast by the serving AP again, and will enter the energy saving mode again according to the energy saving indication, or not enter the energy saving mode. And so on and on.

However, the current terminal has the following two problems:

Question 1: When the terminal does not enter the energy-saving mode under the instruction of the corresponding energy-saving instruction broadcast by its serving AP, the terminal may first receive the next energy-saving instruction corresponding to the terminal broadcast by its serving AP. The energy saving instruction corresponding to the terminal broadcast by its non-serving AP. Since the energy-saving instruction corresponding to the terminal broadcast by the non-serving AP of the terminal is used to instruct the terminal to enter the energy-saving mode, the terminal will enter the energy-saving mode according to the energy-saving instruction. However, after the terminal enters the energy-saving mode, it will no longer receive information. At this time, the terminal may not be able to receive the next energy-saving instruction corresponding to the terminal broadcast by its serving AP, resulting in the terminal being unable to synchronize with the time stamp of its serving AP, so that the terminal cannot receive The unicast frame sent by the service AP, the terminal loses packets.

For example, please refer to FIG. 5 , still taking the single BSSID system shown in FIG. 2 as an example, assuming that the serving AP of the terminal is AP2, and at this time, AP1 is the non-serving AP of the terminal.

In phase 1 in FIG. 5 , the terminal is synchronized with the AP2 time stamp, and the energy-saving instruction broadcast by AP2 corresponding to the terminal is used to instruct the terminal to enter the energy-saving mode, and the terminal enters the energy-saving mode.

However, in stage 2 in FIG. 5 , the energy-saving instruction broadcast by AP2 corresponding to the terminal is used to instruct the terminal to prohibit entering the energy-saving mode, and the terminal does not enter the energy-saving mode under the energy-saving instruction. At this time, the terminal receives an energy-saving instruction broadcast by AP1 corresponding to the terminal, and the energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, and the terminal enters the energy-saving mode according to the energy-saving instruction.

In this way, since the terminal enters the energy saving mode in phase 2 according to the energy saving indication broadcast by AP1 corresponding to the terminal, the terminal will miss the energy saving indication corresponding to the terminal broadcast by AP2 in phase 3 in FIG. 5 . If the corresponding energy-saving instruction broadcast by AP2 in phase 3 is used to instruct the terminal to prohibit entering the energy-saving mode, then the terminal cannot exit the energy-saving mode at this time. The broadcast frame cannot be received by the terminal, causing the terminal to lose packets.

Question 2: When the serving AP of the terminal is switched between multiple APs, if the terminal is in the energy-saving mode, after the serving AP is switched, the terminal is still synchronized with the serving AP timestamp before the switch. In this way, the terminal may not be able to synchronize with the time stamp of the serving AP after switching, so that the terminal may miss the energy-saving instruction corresponding to the terminal broadcast by the serving AP after switching, resulting in terminal packet loss.

For example, please refer to FIG. 6 , still taking the single BSSID system shown in FIG. 2 as an example, assuming that the serving AP of the terminal is AP2, and at this time, AP1 is the non-serving AP of the terminal.

In phase 1 in FIG. 6 , the terminal is synchronized with the AP2 time stamp, and the energy-saving instruction broadcast by AP2 corresponding to the terminal is used to instruct the terminal to enter the energy-saving mode, and the terminal enters the energy-saving mode.

However, in stage 2 in FIG. 6 , when the terminal prohibits the energy-saving mode under the energy-saving instruction broadcast by AP2 corresponding to the terminal, the serving AP of the terminal is switched from AP2 to AP1. At this time, since the terminal is synchronized with the time stamp of AP2, the terminal will receive the energy saving instruction corresponding to the terminal broadcast by AP2, but will not receive the energy saving instruction corresponding to the terminal broadcast by the switched serving AP (AP1).

In stage 3 after the serving AP is switched in Figure 6, the terminal enters the energy-saving mode according to the energy-saving instruction corresponding to the terminal broadcast by AP2. If the serving AP (AP1) at this time broadcasts the energy-saving instruction corresponding to the terminal, the terminal cannot receive The energy saving indicator. If the energy-saving indication broadcast by AP1 to the terminal in phase 3 is used to instruct the terminal to prohibit entering the energy-saving mode, then the terminal cannot exit the energy-saving mode at this time. Therefore, the unicast frame sent to the terminal after AP1 broadcasts the energy-saving indication in phase 3 will not Received by the terminal, causing the terminal to lose packets.

Based on the above problems, several solutions are currently proposed:

Method 1: Configure different BSSIDs for different terminals in the single BSSID system. No matter before or after the switching of the serving AP, for each terminal, the beacon frame broadcast by the serving AP of the terminal not only contains the energy saving indication corresponding to the terminal , including the BSSID of the terminal. In this way, the terminal only processes beacon frames that include the BSSID of the terminal, and does not process beacon frames that do not include the BSSID of the terminal, thereby preventing the terminal from processing beacon frames broadcast by non-serving APs and preventing the terminal from processing the beacon frames broadcast by the non-serving AP. The energy-saving indication corresponding to the terminal in the broadcast beacon frame enters into an energy-saving mode, thereby solving the above two problems.

However, in method 1, a BSSID needs to be configured for each terminal, and the management method for terminals is relatively complicated. Moreover, the beacon frame needs to carry the BSSID, which results in a large overhead of the beacon frame. In addition, since the number of different BSSIDs is limited, the number of terminals that can be accommodated in a single BSSID system is also limited.

Method 2: When the serving AP is switched, the serving AP before the switch sends a unicast beacon frame to the terminal, which is used to indicate the moment when the switched serving AP next broadcasts a beacon frame, so that the terminal Then, according to the unicast beacon frame, the beacon frame can be received at the time of the beacon frame broadcast by the serving AP after switching, so as to obtain the corresponding energy saving indication of the terminal in the beacon frame, so as to solve the above problem 2.

However, method 2 cannot solve the above-mentioned problem 1. In addition, the serving AP before the handover needs to determine the time when the serving AP after the handover broadcasts the beacon frame, which requires high accuracy of the time determined by the serving AP before the handover. Moreover, the serving AP after switching may be affected by data transmission, and may not broadcast the beacon frame on time, so that the terminal still misses the beacon frame broadcast by the serving AP.

Based on the above-mentioned problem 1 and problem 2, the embodiment of the present application provides a terminal control method, which can solve the above-mentioned problem 1 and problem 2, and this method does not have the problems existing in the above-mentioned method 1 and method 2.

Exemplarily, FIG. 7 is a terminal control method provided by an embodiment of the present application, and the method can be used in the single BSSID system shown in FIG. 2 . Optionally, the single BSSID system shown in FIG. 2 may further include a controller (not shown in FIG. 2 ), and the controller is communicatively connected with each AP. In the method shown in FIG. 7 , take AP1 as a terminal non-serving AP and AP2 as a terminal serving AP as an example. As shown in Figure 7, the method may include:

S101. The controller sends a first service indication to AP1, where the first service indication is used to indicate that AP1 is a non-serving AP for a terminal.

S102. The controller sends a second service indication to AP2, where the second service indication is used to indicate that AP2 is a serving AP of the terminal.

The controller may determine a serving AP for serving the terminal in a single BSSID system, and a non-serving AP not for serving the terminal. For example, the controller can jointly determine the serving AP and non-serving AP of the terminal with each AP. The serving AP and non-serving AP jointly determined by the controller and each AP are determined according to the terminal's signal strength, load, channel environment and other information. of.

The controller may also send a service indication (also called an identifier) to each AP in the single-BSSID system to indicate whether the AP is the serving AP of the terminal. For example, the controller sends a first service indication to the non-serving AP (AP1) to indicate that AP1 is the non-serving AP of the terminal; the controller also sends a second service indication to the serving AP (AP2) to indicate that AP2 is the serving AP of the terminal .

S103. According to the first service indication, AP1 determines that AP1 is a non-serving AP of the terminal.

S104, AP2 determines that AP2 is the serving AP of the terminal according to the second service indication.

After each AP in the single-BSSID system receives the service indication sent by the controller, it can determine whether it is the serving AP of the terminal according to the service indication. For example, the AP may store the received service indication in a certain register, and read the register to determine whether the AP is a serving AP or a non-serving AP of the terminal.

S105. The AP2 broadcasts a second energy-saving instruction, where the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, or to prohibit the terminal from entering the energy-saving mode.

AP2 is the serving AP of the terminal, and AP2 can detect whether it buffers unicast frames that need to be sent to the terminal. When AP2 caches unicast frames that need to be sent to the terminal, AP2 determines that the terminal needs to enter the energy-saving mode at this time, so AP2 can broadcast the second energy-saving instruction for instructing the terminal to prohibit entering the energy-saving mode. When AP2 does not cache unicast frames that need to be sent to the terminal, AP2 determines that the terminal is not required to enter the energy-saving mode at this time, so AP2 may broadcast the second energy-saving instruction for instructing the terminal to enter the energy-saving mode.

AP2 may periodically broadcast the second energy-saving indication, and before each broadcast of the second energy-saving indication, check whether it buffers a unicast frame that needs to be sent to the terminal, and then broadcast the second energy-saving indication according to the detection result.

There are various ways for AP2 to broadcast the second energy saving indication.

In an optional manner in which AP2 broadcasts the second energy saving indication, AP2 may directly broadcast the second energy saving indication.

In another optional manner in which AP2 broadcasts the second energy saving indication, AP2 may broadcast the second energy saving indication in a manner of broadcasting a second beacon frame, where the second beacon frame includes the second energy saving indication.

Optionally, the second energy saving indication may be carried by a PVB field in the second beacon frame. For example, the PVB field includes bits corresponding to the AID of the terminal, and the bits may be used to bear the second energy saving indication.

For example, when the value of the bit is 1, it is used to indicate that the second energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode; when the value of the bit is 0, it is used to indicate that the second energy-saving indication is used to indicate The terminal enters the energy saving mode.

Or, when the value of the bit is 0, it is used to indicate that the second energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode; when the value of the bit is 1, it is used to indicate that the second energy-saving indication is used to indicate The terminal enters the energy saving mode.

S106. The AP1 broadcasts a first energy-saving indication, where the first energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode.

Before broadcasting the first energy saving indication, AP1 needs to determine the first energy saving indication. There are various ways for AP1 to determine the first energy saving indication.

In an optional manner for AP1 to determine the first energy-saving indication, AP1 may not need to pay attention to whether the second energy-saving indication broadcast by AP2 indicates that the terminal enters the energy-saving mode, but defaults that the first energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode.

In another optional manner in which AP2 determines the first energy saving indication, before broadcasting the first energy saving indication, AP1 may further obtain a second energy saving indication, and determine the first energy saving indication according to the second energy saving indication.

For example, when the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, AP1 may determine the first energy-saving instruction used to instruct the terminal to prohibit entering the energy-saving mode; when the second energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, AP1 may A first energy-saving indication for instructing the terminal to prohibit entering the energy-saving mode is determined.

There are various ways for AP1 to obtain the second energy-saving instruction. For example, AP1 may receive the second energy saving indication sent by AP2, so as to obtain the second energy saving indication. Alternatively, AP2 may send the second energy saving instruction that it needs to broadcast to the controller, and then the controller sends the second energy saving instruction to AP1, so that AP1 acquires the second energy saving instruction.

After the controller receives the second energy-saving indication sent by the serving AP (AP2) of the terminal, it can send the second energy-saving indication (for example, the PVB field that will carry the second energy-saving indication) to the single BSSID system except AP2. other APs (non-serving APs for terminals, such as AP1). Optionally, the controller may also send the second energy saving instruction to the serving AP of the terminal. At this time, when the controller sends the second energy saving instruction, it is not necessary to distinguish the serving AP and the non-serving AP of the terminal, but the second The energy saving instruction is sent to all APs in the single BSSID system, which simplifies the logic for the controller to send the second energy saving instruction. It can be seen that the controller may send the second energy saving instruction to at least some APs in the single BSSID system, and the at least some APs include non-serving APs of the terminal, and further, the at least some APs may also include serving APs of the terminal.

Optionally, AP1 may broadcast the first energy saving indication, or broadcast the first energy saving indication by broadcasting a first beacon frame, where the first beacon frame includes the first energy saving indication. Exemplarily, the first energy saving indication may be carried by a PVB field in the first beacon frame. For example, the PVB field includes bits corresponding to the AID of the terminal, and the bits may be used to carry the first energy saving indication. The AID of the terminal corresponding to the bit bearing the first energy saving indication may be the same as the AID of the terminal corresponding to the bit bearing the second energy saving indication.

S107. The terminal enters the energy saving mode or does not enter the energy saving mode according to the received energy saving instruction.

After receiving the energy-saving instruction (such as the second energy-saving instruction and/or the first energy-saving instruction), the terminal will analyze the received energy-saving instruction, and enter the energy-saving mode or not enter the energy-saving mode according to the energy-saving instruction.

Optionally, if the AP sends the energy saving indication to the terminal by sending a beacon frame, the terminal may first parse the beacon frame to obtain the energy saving indication, and then parse the energy saving indication. For example, when the energy saving indication is carried in the PVB field in the beacon frame, the terminal can parse the beacon frame to obtain the PVB field, then parse the PVB field to obtain the energy saving indication carried in the PVB field, and then parse the energy saving indication.

During the running process, the terminal will continuously receive the energy-saving instruction, and each time the terminal receives an energy-saving instruction, it can enter the energy-saving mode or not enter the energy-saving mode according to the energy-saving instruction.

For example, the terminal is synchronized with the time stamp of its serving AP (AP2), and the terminal can receive the second energy saving instruction corresponding to the terminal broadcast by AP2. When the second energy saving indication is used to instruct the terminal to enter the energy saving mode, the terminal enters the energy saving mode. When the second energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode, the terminal does not enter the energy-saving mode.

During this process, it is assumed that the above-mentioned problem 1 occurs, that is, when the terminal does not enter the energy-saving mode, it receives the first energy-saving instruction corresponding to the terminal broadcast by AP1. Since the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the terminal will not enter the energy-saving mode under the instruction of its non-serving AP (AP1). When the serving AP (AP2) of the terminal broadcasts the second energy-saving instruction next time, the terminal can always receive the second energy-saving instruction, so that the terminal can always synchronize with its serving AP time stamp and avoid packet loss of the terminal.

For example, please refer to FIG. 8. In Phase 1 in FIG. 8, the terminal is synchronized with the AP2 time stamp, and the second energy-saving indication broadcast by the terminal corresponding to the terminal is used to instruct the terminal to enter the energy-saving mode. At this time, the terminal according to the second energy-saving indication Enter energy saving mode.

If the above-mentioned problem 1 occurs in stage 2 in Figure 8, when the terminal does not enter the energy-saving mode under the instruction of the second energy-saving instruction broadcast by AP2, the terminal receives the first energy-saving instruction corresponding to the terminal broadcast by AP1. However, since the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, at this time, the terminal will not enter the energy-saving mode according to the energy-saving instruction.

In this way, since the terminal does not enter the energy saving mode according to the second energy saving instruction broadcast by AP1 in phase 2, the terminal will not miss the energy saving instruction of the terminal broadcast by AP2 in phase 3 in FIG. 8 . At this time, if the second energy-saving indication corresponding to the terminal broadcast by AP2 in phase 3 is used to instruct the terminal to prohibit entering the energy-saving mode, then the terminal can be prohibited from entering the energy-saving mode according to the second energy-saving indication. Therefore, AP2 broadcasts in phase 3 The unicast frame sent to the terminal after the second energy-saving indication will be received by the terminal, which avoids packet loss at the terminal, thereby solving the above problem 1.

In addition, when the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, the terminal will enter the energy-saving mode according to the second energy-saving instruction, so as to realize energy-saving of the terminal and ensure energy-saving efficiency. Moreover, since the terminal will not receive information after entering the energy-saving mode, even if the non-serving AP (AP1) of the terminal broadcasts the first energy-saving instruction corresponding to the terminal, and the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, The terminal will not receive the first energy-saving instruction, and will not exit the energy-saving mode under the instruction of the first energy-saving instruction.

Further, when the serving AP of the terminal is switched, and the serving AP is switched from the aforementioned AP2 to AP1, as shown in FIG. 9 , the terminal control method provided in this embodiment of the present application further includes:

S201. The controller sends a first service indication to AP2, where the first service indication is used to indicate that AP2 is a non-serving AP for a terminal.

For S201, reference may be made to the foregoing S101, and details are not described here in this embodiment of the present application.

S202. The controller sends a second service indication to AP1, where the second service indication is used to indicate that AP1 is a serving AP of the terminal.

For S202, reference may be made to the foregoing S102, and details are not described here in this embodiment of the present application.

S203, AP2 determines that AP2 is a non-serving AP of the terminal according to the first service indication.

For S203, reference may be made to the foregoing S103, and details are not described here in this embodiment of the present application.

S204, AP1 determines that AP1 is the serving AP of the terminal according to the second service indication.

For S204, reference may be made to the foregoing S104, and details are not described here in this embodiment of the present application.

S205. The AP1 broadcasts a second energy-saving instruction, where the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, or to prohibit the terminal from entering the energy-saving mode.

For S205, reference may be made to the foregoing S105, and details are not described here in this embodiment of the present application.

S206. The AP2 broadcasts a first energy-saving indication, where the first energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode.

For S206, reference may be made to the foregoing S106, and details are not described here in this embodiment of the present application.

S207. The terminal enters the energy saving mode or does not enter the energy saving mode according to the received energy saving instruction.

For S207, reference may be made to the foregoing S107, and details are not described here in this embodiment of the present application.

According to the embodiment shown in FIG. 9, it can be seen that when the serving AP of the terminal is switched from AP2 to AP1, AP1 serves as the serving AP of the terminal, and AP2 serves as the non-serving AP of the terminal. At this time, the operation of AP1 serving as the terminal can refer to the operation of AP2 serving as the terminal serving AP in Figure 7, and the operation of AP2 serving as the terminal non-serving AP can refer to the operation of AP1 serving as the terminal non-serving AP in Figure 7 operation. Since the embodiment shown in FIG. 7 can solve the above-mentioned problem 1 when the serving AP of the terminal is not switched, the embodiment shown in FIG. 9 can also solve the above-mentioned problem 1 after the serving AP of the terminal is switched.

Moreover, when the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode, the terminal will enter the energy-saving mode according to the second energy-saving instruction, so as to realize energy-saving of the terminal and ensure energy-saving efficiency. Moreover, since the terminal will not receive information after entering the energy-saving mode, even if the non-serving AP (AP2) of the terminal broadcasts the first energy-saving instruction corresponding to the terminal, and the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, The terminal will not receive the first energy-saving instruction, and will not exit the energy-saving mode under the instruction of the first energy-saving instruction.

In addition, for the above problem 2, when the serving AP of the terminal is handed over, it is assumed that the terminal is synchronized with the time stamp of the serving AP before the handover, and the terminal is not synchronized with the time stamp of the serving AP after the handover. Since the serving AP before the handover becomes the non-serving AP after the handover, the energy-saving indication corresponding to the terminal broadcast by the non-serving AP after the handover is used to instruct the terminal to prohibit entering the energy-saving mode. The terminal can be prohibited from entering the energy-saving mode according to the energy-saving instruction until the terminal receives the energy-saving instruction corresponding to the terminal broadcast by the switched serving AP, so as to realize the time stamp synchronization between the terminal and the switched serving AP, and avoid terminal Packet loss, solves problem 2 above.

For example, please refer to Figure 10. In Phase 1 in Figure 10, the terminal is synchronized with the AP2 time stamp, and the second energy-saving indication broadcast by AP2 is used to instruct the terminal to enter the energy-saving mode, and the terminal will enter the energy-saving mode according to the second energy-saving indication. Energy saving mode.

If in phase 2 in FIG. 10 , the terminal does not enter the energy saving mode under the energy saving instruction broadcast by AP2 corresponding to the terminal, the serving AP of the terminal is switched from AP2 to AP1. At this time, if the terminal is synchronized with the time stamp of AP2, the terminal will receive the first energy-saving indication broadcast by AP2. Since AP2 is the non-serving AP of the terminal at this time, the first energy-saving indication broadcast by AP2 is used to instruct the terminal to prohibit entering the energy-saving mode. Therefore, the terminal is prohibited from entering the energy-saving mode according to the first energy-saving instruction until the terminal receives the second energy-saving instruction broadcast by AP1.

At this time, if the second energy-saving indication corresponding to the terminal broadcast by AP1 in phase 3 is used to instruct the terminal to prohibit entering the energy-saving mode, then the terminal can be prohibited from entering the energy-saving mode according to the second energy-saving indication. Therefore, AP1 broadcasts in phase 3 The unicast frame sent to the terminal after the second energy-saving indication will be received by the terminal, which avoids packet loss at the terminal, thereby solving the above problem 2.

It can be seen that even if the serving AP of the terminal is switched, the terminal can always receive the energy-saving indication broadcast by the serving AP of the terminal, so that the terminal and its serving AP time stamp are synchronized to avoid terminal packet loss.

In the embodiments shown in FIG. 7 and FIG. 9 , no matter whether the second energy saving instruction is used to instruct the terminal to enter the energy saving mode or to prohibit the terminal from entering the energy saving mode, the first energy saving instruction is used to instruct the terminal to prohibit entering the energy saving mode as an example. Optionally, the above-mentioned first energy-saving indication may also be consistent with the second energy-saving indication.

For example, when the second energy saving instruction is used to instruct the terminal to enter the energy saving mode, the first energy saving instruction is used to instruct the terminal to enter the energy saving mode; when the second energy saving instruction is used to instruct the terminal to prohibit entering the energy saving mode, the first energy saving instruction is used to indicate The terminal is prohibited from entering the energy-saving mode.

In this case, before the non-serving AP (such as AP1 in FIG. 7 or AP2 in FIG. 8 ) broadcasts the first energy saving instruction, it needs to obtain the above-mentioned second energy saving instruction, and determine the first energy saving instruction according to the second energy saving instruction. Energy saving indicator. For the manner in which the non-serving AP acquires the second energy-saving indication, reference may be made to the manner in which AP1 acquires the second energy-saving indication in S106 above, and details are not described in this embodiment of the present application.

When the first energy-saving instruction is consistent with the second energy-saving instruction, the above problems 1 and 2 can also be solved, and the analysis is as follows:

For question 1:

Assume that problem 1 occurs, that is, when the terminal does not enter the energy-saving mode, it receives the first energy-saving indication broadcast by the non-serving AP of the terminal. Since the first energy-saving instruction is consistent with the second energy-saving instruction broadcast by the serving AP, the first energy-saving instruction currently also instructs the terminal to prohibit entering the energy-saving mode, and the terminal will not enter the energy-saving mode under the instruction of the first energy-saving instruction. When the serving AP of the terminal broadcasts the second energy saving instruction next time, the terminal can always receive the second energy saving instruction, so that the terminal can always synchronize with the time stamp of the serving AP and avoid packet loss of the terminal.

For example, please refer to Figure 11. In Phase 1 in Figure 11, the terminal is synchronized with the time stamp of AP2 (the serving AP of the terminal), and the second energy-saving instruction broadcast by AP2 corresponding to the terminal is used to instruct the terminal to enter the energy-saving mode. The second energy-saving instruction enters into an energy-saving mode.

If the above-mentioned problem 1 occurs in stage 2 in FIG. 11 , and the terminal does not enter the energy-saving mode under the instruction of the second energy-saving instruction broadcast by AP2, the terminal receives the first energy-saving instruction corresponding to the terminal broadcast by AP1. However, since the first energy-saving instruction is also used to instruct the terminal to prohibit entering the energy-saving mode, at this time, the terminal will not enter the energy-saving mode according to the energy-saving instruction.

In this way, since the terminal does not enter the energy saving mode in phase 2 according to the first energy saving indication broadcast by AP1, the terminal will not miss the second energy saving indication broadcast by AP2 in phase 3 in FIG. 11 . At this time, if the second energy-saving indication broadcast by AP2 in phase 3 is used to instruct the terminal to prohibit entering the energy-saving mode, then the terminal can be prohibited from entering the energy-saving mode according to the second energy-saving indication. Therefore, AP2 broadcasts the second energy-saving mode in phase 3. The unicast frame sent to the terminal after the instruction will be received by the terminal, which avoids packet loss at the terminal, thereby solving the above problem 1.

In addition, when the second energy saving instruction is used to instruct the terminal to enter the energy saving mode, the terminal will enter the energy saving mode according to the second energy saving instruction, so as to realize energy saving of the terminal and ensure energy saving efficiency. Since the terminal will not receive information after entering the energy-saving mode, no matter whether the first energy-saving indication broadcast by the non-serving AP is used to instruct the terminal to enter the energy-saving mode, the terminal will not receive the first energy-saving indication, and will not The indication of the first energy-saving indication is to enter or not to enter the energy-saving mode.

For question 2:

Assume that problem 2 occurs, that is, when the serving AP of the terminal is switched, the terminal is synchronized with the time stamp of the serving AP before the handover, and the terminal is not synchronized with the time stamp of the serving AP after the handover. Since the first energy-saving instruction broadcast by the non-serving AP is consistent with the second energy-saving instruction broadcast by the serving AP, if the second energy-saving instruction broadcast by the serving AP after switching is used to instruct the terminal to prohibit entering the energy-saving mode, then the non-serving AP after switching The first energy-saving indication broadcast by the serving AP is also used to instruct the terminal to prohibit entering the energy-saving mode. At this time, the terminal can prohibit entering the energy-saving mode according to the first energy-saving instruction until the terminal receives the second energy-saving instruction corresponding to the terminal broadcast by the switched serving AP, so as to realize the time stamp synchronization between the terminal and the switched serving AP, and avoid In order to avoid terminal packet loss when the serving AP is switched, the above-mentioned problem 2 is solved.

For example, please refer to FIG. 12. In Phase 1 in FIG. 12, the terminal is synchronized with the AP2 time stamp, and the second energy-saving indication corresponding to the terminal broadcast by AP2 is used to instruct the terminal to enter the energy-saving mode, and the terminal enters the energy-saving mode according to the second energy-saving indication. model.

If in phase 2 in FIG. 12 , the terminal does not enter the energy saving mode under the energy saving instruction broadcast by AP2 corresponding to the terminal, the serving AP of the terminal is switched from AP2 to AP1. At this time, if the terminal is synchronized with the AP2 time stamp, the terminal will receive the first energy-saving indication broadcast by AP2. The broadcasted second energy-saving indication remains consistent. When the second energy-saving instruction broadcast by AP1 is used to instruct the terminal to prohibit entering the energy-saving mode, the first energy-saving instruction broadcast by AP2 is also used to instruct the terminal to prohibit entering the energy-saving mode. Therefore, the terminal will prohibit entering the energy-saving mode according to the first energy-saving instruction. Until the terminal receives the second energy saving indication broadcast by AP1.

In addition, when the second energy saving instruction broadcast by the switched serving AP is used to instruct the terminal to enter the energy saving mode, the first energy saving mode broadcast by the switched non-serving AP is also used to instruct the terminal to enter the energy saving mode. Even if the terminal is synchronized with the time stamp of the non-serving AP after switching, the terminal receives the first energy-saving indication broadcast by the non-serving AP for instructing the terminal to enter the energy-saving mode, and the terminal can enter the energy-saving mode according to the first energy-saving indication, so as to realize the energy saving mode of the terminal. Energy-saving, to ensure energy-saving efficiency.

According to the above content, in the terminal control method provided by the embodiment of the present application, for any AP (referred to as the first AP) in the single BSSID system, the first AP can determine whether the first AP is used to provide services to the terminal the serving AP; when the first AP is not the serving AP, the first AP broadcasts the first energy-saving instruction. When the first AP is not the serving AP, the serving AP broadcasts the second energy saving indication.

In one case, no matter whether the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode or to prohibit the terminal from entering the energy-saving mode, the first energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode.

In another case, when the second energy saving indication is used to instruct the terminal to enter the energy saving mode, the first energy saving indication is also used to instruct the terminal to enter the energy saving mode. When the second energy-saving instruction is used to instruct the terminal to prohibit entering the energy-saving mode, the first energy-saving instruction is also used to instruct the terminal to prohibit entering the energy-saving mode.

It can be seen that the first energy-saving instruction can instruct the terminal to prohibit entering the energy-saving mode, and at this time the second energy-saving instruction is used to instruct the terminal to enter the energy-saving mode or prohibit entering the energy-saving mode.

Optionally, when the first AP is not the serving AP, before the first AP broadcasts the first energy saving instruction, the first AP may also acquire the above-mentioned second energy saving instruction. At this time, the first AP may determine the first energy saving instruction according to the second energy saving instruction, and broadcast the first energy saving instruction.

Optionally, the first AP may directly receive the second energy saving indication sent by the second AP, so as to obtain the second energy saving indication. Alternatively, the first AP may also receive the second energy saving instruction sent by the controller, so as to obtain the second energy saving instruction.

Optionally, when the first AP broadcasts the first energy saving indication, it may only broadcast the first energy saving indication, or may broadcast the first beacon frame including the first energy saving indication. For example, in the first beacon frame, the first energy saving indication may be carried by the PVB field in the first beacon frame.

Optionally, before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the first AP may receive a service indication sent by the controller, and the service indication is used to indicate whether the first AP is a serving AP ; When determining whether the first AP is the serving AP, the first AP may determine whether the first AP is the serving AP according to the service indication. Of course, the first AP may not determine whether the first AP is the serving AP based on the service indication. For example, the staff can configure information on whether the first AP is the serving AP on the first AP, and the first AP can determine the Whether the first AP is a serving AP. If the first AP does not need to determine whether the first AP is the serving AP of the terminal according to the service indication sent by the controller, and the first AP does not need to receive the second energy saving indication sent by the controller, then the BSSID provided in the embodiment of the present application may not include controller.

Optionally, when the first AP determines that the first AP is a serving AP, the first AP may send an energy-saving indication to the controller (similar to the second energy-saving indication that AP2 sends to the controller in the embodiment shown in FIG. 7); the energy-saving The indication is used to indicate whether the first AP requires the terminal to enter the energy saving mode.

It can be seen that the terminal control method provided in the embodiment of the present application can not only solve the above problems 1 and 2.

Moreover, compared with the above method 1, since the terminal control method provided by the embodiment of the present application does not need to configure different BSSIDs for different terminals, the management method of the terminal in the embodiment of the present application is relatively simple, and the beacon frame does not need to carry the BSSID , the overhead of beacon frames is small. In addition, since there is no need to configure different BSSIDs for different terminals, the number of terminals that can be accommodated in a single BSSID system is not limited.

Compared with method 2, the terminal control method provided in the embodiment of the present application can solve the above-mentioned problems 1 and 2. In addition, the serving AP before the handover does not need to determine the moment when the serving AP after the handover broadcasts the beacon frame. Therefore, the terminal control method provided in the embodiment of the present application has relatively low requirements on the AP.

According to the terminal control method provided in the embodiment of the present application, it can be seen that the embodiment of the present application also provides a terminal control system, the terminal control system is a single BSSID system, and the terminal control system includes: a terminal and multiple access points AP; The terminal control system includes:

A first AP, where the first AP is any one of the multiple APs. The first AP is configured to broadcast a first energy-saving indication when it is determined that the first AP is not a serving AP for providing services to the terminal, and the first energy-saving indication is used to instruct the terminal to prohibit entering an energy-saving mode ; The terminal is configured to enter the energy-saving mode or not enter the energy-saving mode according to the received energy-saving instruction.

Optionally, the first AP is also configured to send an energy-saving indication to the controller when it is determined that the first AP is a serving AP (similar to the second energy-saving indication sent by AP2 to the controller in the embodiment shown in FIG. 7); the energy-saving indication It is used to indicate whether the first AP requires the terminal to enter the energy-saving mode.

The terminal control method provided by this application has been described in detail above with reference to FIG. 1 to FIG. 12 . It can be understood that, in order to realize the functions described in the above-mentioned methods, the first AP and the controller need to include corresponding functions for executing each function. hardware and/or software modules. In combination with the execution process of each method described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software drives hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different ways to implement the described functions in combination with the embodiments for each specific application, but such implementation should not be regarded as exceeding the scope of the present application.

In this embodiment, the functional modules of the first AP and the controller can be divided according to the above method embodiment. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. . The above integrated modules may be implemented in the form of hardware.

When the functional module division method is adopted, the terminal control device (such as the above-mentioned first AP and controller) provided by the present application will be described below with reference to FIG. 13 , FIG. 14 and FIG. 15 .

FIG. 13 is a block diagram of a first AP provided by an embodiment of the present application. As shown in FIG. 13 , the first AP includes: a determination module 1301 and a broadcast module 1302 .

The determination module 1301 is used to determine whether the first AP is a serving AP for providing services to the terminal; the operations performed by the determination module 1301 can refer to the content related to AP1 in S103 above, or refer to the content related to AP2 in S203 relevant content.

The broadcast module 1302 is configured to broadcast a first energy-saving indication when the first AP is not a serving AP, and the first energy-saving indication is used to instruct the terminal to prohibit entering into an energy-saving mode. For the operation performed by the broadcast module 1302, refer to the content related to AP1 in S106 above, or refer to the content related to AP2 in S206.

Optionally, the first AP needs to determine the first energy saving indication before broadcasting the first energy saving indication. There are various manners for the first AP to determine the first energy saving indication. In an optional manner in which the first AP determines the first energy-saving indication, the first AP further includes: an obtaining module (not shown in FIG. 13 ), configured to, when the first AP is not a serving AP, Before the first AP broadcasts the first energy-saving indication, obtain a second energy-saving indication; the second energy-saving indication is an energy-saving indication broadcast by the serving AP; the second energy-saving indication is used to instruct the terminal to enter an energy-saving mode; Alternatively, the second energy saving indication is used to instruct the terminal to prohibit entering the energy saving mode. For operations performed by the obtaining module, reference may be made to the content related to the non-serving AP obtaining the second energy-saving knowledge broadcast by the serving AP in the embodiments shown in FIG. 7 and FIG. 8 .

Optionally, the single BSSID system further includes a controller, and the first AP further includes: a receiving module (not shown in FIG. 13 ). a receiving module, configured to receive a service indication sent by the controller before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the service indication is used to indicate the Whether the first AP is a serving AP; the determining module is configured to determine whether the first AP is a serving AP according to the service indication. Of course, the first AP may not determine whether the first AP is the serving AP according to the service indication. Whether the first AP is a serving AP. For the operations performed by the receiving module, refer to the content related to AP1 in S101 above, or refer to the content related to AP2 in S201.

Optionally, the single BSSID system further includes a controller, and the first AP further includes: a sending module (not shown in FIG. 13 ), configured to, when the first AP is a serving AP, send The controller sends an energy-saving indication (similar to the serving AP sending the second energy-saving indication to the controller); the energy-saving indication is used to indicate whether the first AP requires the terminal to enter an energy-saving mode. For operations performed by the sending module, reference may be made to content related to the serving AP sending the energy saving indication to the controller in the embodiments shown in FIG. 7 and FIG. 8 .

Fig. 14 is a block diagram of a controller provided by an embodiment of the present application. As shown in FIG. 14 , the controller includes: a receiving module 1401 and a sending module 1402 .

The receiving module 1401 is configured to receive an energy-saving instruction sent by a serving AP, the serving AP is an AP among the plurality of APs used to provide services to the terminal, and the energy-saving instruction is used to indicate whether the serving AP requires the required The terminal enters the energy-saving mode; the operations performed by the receiving module 1401 can refer to the content related to the controller receiving the energy-saving indication sent by the serving AP in the embodiments shown in FIG. 7 and FIG. 8 .

The sending module 1402 is configured to send the energy saving indication to at least some APs in the multiple APs, and the at least some APs include APs in the multiple APs except the serving AP. For operations performed by the sending module 1402, reference may be made to content related to the controller in S101, S102, S201, and S202 above.

Optionally, the at least some APs further include the serving AP.

In the case of using an integrated unit, both the controller and the first AP provided in the present application may be called a terminal control device, and the terminal control device may include a processing module, a storage module, and a communication module. Wherein, the processing module may be used to control and manage the actions of the terminal control device, for example, may be used to support the terminal control device to perform the actions performed by the controller or any AP in S101 to S106 above. The storage module can be used to support the terminal control device to execute stored program codes and data. The communication module can be used for communication between the terminal control device and other devices.

Wherein, the processing module may be a processor or a controller. It can implement or execute the various illustrative logical blocks, modules and circuits described in connection with the present disclosure. The processor can also be a combination of computing functions, such as a combination of one or more microprocessors, a combination of digital signal processing (digital signal processing, DSP) and a microprocessor, and the like. The storage module may be a memory. The communication module can be a radio frequency circuit, a bluetooth chip, a Wi-Fi chip, and other devices that interact with other devices.

In one embodiment, when the processing module is a processor, the storage module is a memory, and the communication module is a communication interface, the terminal control device involved in this embodiment may include: a processor; the processor is used to couple with the memory and read After the instruction in the memory, the method executed by the terminal control device as described in the embodiment of the present application is executed according to the instruction. In an implementation manner, the above-mentioned modules and the like included in the terminal control device may be computer programs stored in a memory, and invoked by a processor to implement corresponding execution functions of each module.

In the terminal control device, the number of processors can be multiple, and the memory coupled with the processor can be independent of the processor or the terminal control device, or can be inside the processor or the terminal control device . The storage can be a physically independent unit, or it can be a storage space on a cloud server or a network hard disk. Optionally, there may be one or more memories. When there are multiple memories, they can be located at the same or different locations, and can be used independently or in conjunction.

Exemplarily, when the memory is located inside the terminal control device, please refer to FIG. 15 , the terminal control device 200 includes: a processor 202 and a memory 201, wherein the memory 201 is used to store programs, and the processor 202 is used to call the program stored in the memory 201. stored program, so that the terminal control device executes a corresponding method or function. Optionally, as shown in FIG. 15 , the terminal control device 200 may further include at least one communication interface 203 and at least one communication bus 204 . The memory 201 , the processor 202 and the communication interface 203 are communicatively connected through a communication bus 204 . Wherein, the communication interface 203 is used for communicating with other devices under the control of the processor 202 , and the processor 202 can call the program stored in the memory 201 through the communication bus 204 .

An embodiment of the present application provides a computer storage medium, and a computer program is stored in the storage medium; when the computer program is run on a computer, the computer executes any one of the terminal control methods provided in the embodiments of the present application by the first A method performed by an AP or controller.

The embodiment of the present application also provides a computer program product containing instructions. When the computer program product is run on the computer, it causes the computer to execute any one of the terminal control methods provided in the embodiment of the present application by the first AP or the controller. Methods.

In the above embodiments, all or part of them may be implemented by software, hardware, firmware or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product comprising one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part. The computer may be a general purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data The center transmits to another website site, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media. The available medium may be a magnetic medium (for example, a floppy disk, a hard disk, or a magnetic tape), an optical medium, or a semiconductor medium (for example, a solid-state hard disk).

In the present application, the terms "first" and "second" etc. are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. The term "at least one" means one or more, and "plurality" means two or more, unless otherwise clearly defined.

Different types of embodiments such as method embodiments, device embodiments, and system embodiments provided in the embodiments of the present application may refer to each other, which is not limited in the embodiments of the present application. The sequence of operations in the method embodiments provided in the embodiments of this application can be appropriately adjusted, and the operations can also be increased or decreased according to the situation. Any person familiar with the technical field can easily think of changes within the technical scope disclosed in this application. Methods should be covered within the scope of protection of the present application, so they will not be repeated here.

In the corresponding embodiments provided in the present application, it should be understood that the disclosed systems and devices may be implemented in other configurations. For example, the device embodiments described above are only illustrative. For example, the division of modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules can be combined or integrated into another A system, or some feature, can be ignored, or not implemented. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be in electrical or other forms.

A unit described as a separate component may or may not be physically separated, and a component described as a unit may or may not be a physical unit, and may be located in one place or distributed over multiple devices. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

The above is only an optional implementation mode of the application, but the protection scope of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the application. The modifications or replacements should be covered by the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

The above are only optional embodiments of the application, and are not intended to limit the application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the application shall be included in the protection of the application. within range.

Claims

A terminal control method, characterized in that the method is used for a first access point AP in a single basic service set identifier (BSSID) system, and the single BSSID system includes: the terminal and multiple APs, the first An AP is any AP in the plurality of APs; the method includes:

The first AP determines whether the first AP is a serving AP for providing services to the terminal;

When the first AP is not a serving AP, the first AP broadcasts a first energy saving indication, where the first energy saving indication is used to instruct the terminal to prohibit entering into an energy saving mode.
The method according to claim 1, wherein when the first AP is not a serving AP, before the first AP broadcasts the first energy saving indication, the method further comprises:

The first AP obtains a second energy-saving indication; the second energy-saving indication is an energy-saving indication broadcast by the serving AP, and the second energy-saving indication is used to instruct the terminal to enter an energy-saving mode.
The method according to claim 1, wherein when the first AP is not a serving AP, before the first AP broadcasts the first energy saving indication, the method further comprises:

The first AP acquires a second energy-saving indication; the second energy-saving indication is an energy-saving indication broadcast by the serving AP, and the second energy-saving indication is used to instruct the terminal to prohibit entering an energy-saving mode.
The method according to claim 2 or 3, wherein the single-BSSID system further includes a controller, and the first AP obtains the second energy-saving instruction, including:

The first AP receives the second energy saving instruction sent by the controller.
The method according to any one of claims 1 to 4, wherein the first AP broadcasts a first energy saving indication, comprising:

The first AP broadcasts a first beacon frame, where the first beacon frame includes the first energy saving indication.
The method according to claim 5, wherein the first energy saving indication is carried by a partial virtual bitmap PVB field in the first beacon frame.
The method according to any one of claims 1 to 6, wherein the single BSSID system further comprises a controller, which determines whether the first AP is used to provide services to the terminal at the first AP. Before serving the AP, the method also includes:

The first AP receives a service indication sent by the controller, where the service indication is used to indicate whether the first AP is a serving AP;

The determining by the first AP whether the first AP is a serving AP for providing services to the terminal includes:

The first AP determines whether the first AP is a serving AP according to the service indication.
The method according to any one of claims 1 to 7, wherein the single BSSID system further comprises a controller, and the method further comprises:

When the first AP is a serving AP, the first AP sends an energy saving indication to the controller; the energy saving indication is used to indicate whether the first AP requires the terminal to enter an energy saving mode.
A terminal control method, characterized in that the method is used for a controller in a basic service set identifier single BSSID system, and the single BSSID system also includes: the terminal and multiple access points AP; the method include:

The controller receives an energy-saving indication sent by a serving AP, where the serving AP is an AP among the plurality of APs used to provide services to the terminal, and the energy-saving indication is used to indicate whether the serving AP requires the terminal to Enter energy saving mode;

The controller sends the energy saving indication to at least some APs in the multiple APs, and the at least some APs include APs in the multiple APs except the serving AP.
The method according to claim 9, wherein the at least some APs further include the serving AP.
A terminal control system, characterized in that the system includes: a terminal and multiple access points AP; the system includes:

a first AP, configured to determine whether the first AP is a serving AP for providing services to the terminal, where the first AP is any one of the plurality of APs;

The first AP is further configured to broadcast a first energy-saving indication when the first AP is not a serving AP, and the first energy-saving indication is used to instruct the terminal to prohibit entering an energy-saving mode;

The terminal is configured to enter the energy saving mode or not enter the energy saving mode according to the received energy saving instruction.
The terminal control system according to claim 11, wherein:

The serving AP among the plurality of APs is used to broadcast a second energy-saving indication, and the second energy-saving indication is used to instruct the terminal to enter an energy-saving mode;

The first AP is further configured to acquire the second energy saving indication before broadcasting the first energy saving indication when the first AP is not a serving AP.
The terminal control system according to claim 11, wherein:

The serving AP among the plurality of APs is used to broadcast a second energy-saving indication, and the second energy-saving indication is used to instruct the terminal to prohibit entering the energy-saving mode;

The first AP is further configured to acquire the second energy saving indication before broadcasting the first energy saving indication when the first AP is not a serving AP.
The terminal control system according to claim 12 or 13, wherein the terminal control system further comprises a controller;

The serving AP among the plurality of APs is further configured to send the second energy saving instruction to the controller;

The first AP is further configured to receive the second energy saving instruction sent by the controller.
The terminal control system according to any one of claims 11 to 14, wherein the terminal control system further comprises a controller;

The first AP is further configured to send an energy saving indication to the controller when the first AP is a serving AP; the energy saving indication is used to indicate whether the first AP requires the terminal to enter an energy saving mode;

The controller is configured to send the energy saving indication to at least some APs in the multiple APs, and the at least some APs include APs in the multiple APs except the first AP.
A first access point AP, characterized in that the first AP belongs to a basic service set identifier single BSSID system, the single BSSID system includes: the terminal and multiple APs, the first AP is the Any one of the multiple APs; the first AP includes:

a determining module, configured to determine whether the first AP is a serving AP for providing services to the terminal;

A broadcast module, configured to broadcast a first energy-saving indication when the first AP is not a serving AP, and the first energy-saving indication is used to instruct the terminal to prohibit entering into an energy-saving mode.
The first AP according to claim 16, further comprising:

An acquisition module, configured to acquire a second energy-saving indication before the first AP broadcasts a first energy-saving indication when the first AP is not a serving AP; the second energy-saving indication is an energy-saving indication broadcast by the serving AP , the second energy saving indication is used to instruct the terminal to enter an energy saving mode.
The first AP according to claim 16, further comprising:

An acquisition module, configured to acquire a second energy-saving indication before the first AP broadcasts a first energy-saving indication when the first AP is not a serving AP; the second energy-saving indication is an energy-saving indication broadcast by the serving AP , the second energy saving indication is used to instruct the terminal to prohibit entering the energy saving mode.
The first AP according to claim 17 or 18, wherein the single-BSSID system further includes a controller, and the obtaining module is configured to: receive the second energy-saving instruction sent by the controller.
The first AP according to any one of claims 16 to 19, wherein the broadcast module is used for:

broadcasting a first beacon frame, the first beacon frame including the first power saving indication.
The first AP according to claim 20, wherein the first energy saving indication is carried by a partial virtual bitmap PVB field in the first beacon frame.
The first AP according to any one of claims 16 to 21, wherein the single BSSID system further includes a controller, and the first AP further includes:

a receiving module, configured to receive a service indication sent by the controller before the first AP determines whether the first AP is a serving AP for providing services to the terminal, the service indication is used to indicate the Whether the first AP is a serving AP;

The determining module is configured to determine whether the first AP is a serving AP according to the service indication.
The first AP according to any one of claims 16 to 22, wherein the single BSSID system further includes a controller, and the first AP further includes:

A sending module, configured to send an energy-saving indication to the controller when the first AP is a serving AP; the energy-saving indication is used to indicate whether the first AP requires the terminal to enter an energy-saving mode.
A controller, characterized in that the controller belongs to a basic service set identifier single BSSID system, and the single BSSID system further includes: the terminal and multiple access points AP; the controller includes:

A receiving module, configured to receive an energy saving indication sent by a serving AP, where the serving AP is an AP providing services to the terminal among the plurality of APs, and the energy saving indication is used to indicate whether the serving AP requires the The terminal enters the energy-saving mode;

A sending module, configured to send the energy saving indication to at least some APs in the multiple APs, the at least some APs include APs in the multiple APs except the serving AP.
The controller according to claim 24, wherein the at least some APs further include the serving AP.