CN115209353A

CN115209353A - Method and apparatus for wireless communication

Info

Publication number: CN115209353A
Application number: CN202110385394.7A
Authority: CN
Inventors: 阙蕾宇; 邓邱; 鞠宏浩; 周培; 黄磊; 卢刘明; 罗朝明
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-04-09
Filing date: 2021-04-09
Publication date: 2022-10-18
Also published as: WO2022213428A1

Abstract

The embodiment of the application provides a wireless communication method and equipment, which can reduce eBCS service discovery delay, eBCS data authentication delay and eBCS data packet loss rate caused by STA cross-AP switching, so as to optimize STA cross-AP switching. The method of wireless communication comprises: before switching among the APs, the STA equipment acquires eBCS service information of a target AP.

Description

Method and apparatus for wireless communication

Technical Field

The embodiments of the present application relate to the field of communications, and in particular, to a method, a station device, and an access point device for wireless communications.

Background

The 802.11bc standard supports Station (STA) mobility, which may cause a STA to handoff from one Access Point (AP) to another AP due to mobility. However, in the process of switching the AP by the STA, the STA receiving an Enhanced Broadcast Service (eBCS) Service has the problems of long discovery time, prolonged data authentication, high packet loss rate, and the like, and seriously affects the eBCS Service in the process of switching the AP by the STA.

Disclosure of Invention

The embodiment of the application provides a wireless communication method and device, which can optimize eBCS service in the process of switching AP by STA.

In a first aspect, a method of wireless communication is provided, the method comprising:

before a STA switches from a source AP to a target AP, the STA acquires eBCS service information of the target AP from the source AP.

In a second aspect, a method of wireless communication is provided, the method comprising:

before a STA switches from a source AP to a target AP, the source AP sends eBCS service information of the target AP to the STA.

In a third aspect, a method of wireless communication is provided, the method comprising:

the STA acquires eBCS service information of at least one candidate AP from a source AP;

the STA determining a target AP from the at least one candidate AP;

after the STA is switched from the source AP to the target AP, the STA receives eBCS data of the target AP according to the eBCS service information of the target AP.

In a fourth aspect, a method of wireless communication is provided, the method comprising:

the source AP sends the eBCS service information of at least one candidate AP to the STA.

In a fifth aspect, a station device is provided for performing the method of the first aspect.

In particular, the station device comprises functional modules for performing the method of the first aspect described above.

In a sixth aspect, an access point device is provided for performing the method of the second aspect.

In particular, the access point device comprises functional means for performing the method in the second aspect described above.

In a seventh aspect, a station device is provided for executing the method in the third aspect.

In particular, the station device comprises functional modules for performing the method in the third aspect described above.

In an eighth aspect, an access point device is provided for performing the method in the fourth aspect.

In particular, the access point device comprises functional means for performing the method in the fourth aspect described above.

In a ninth aspect, a station apparatus is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the first aspect.

In a tenth aspect, an access point device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the second aspect.

In an eleventh aspect, a station device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the third aspect.

In a twelfth aspect, an access point device is provided that includes a processor and a memory. The memory is used for storing a computer program, and the processor is used for calling and running the computer program stored in the memory to execute the method in the fourth aspect.

In a thirteenth aspect, there is provided an apparatus for implementing the method of any one of the first to fourth aspects above.

Specifically, the apparatus includes: a processor for calling and running the computer program from the memory so that the apparatus on which the apparatus is installed performs the method of any of the first to fourth aspects described above.

In a fourteenth aspect, a computer-readable storage medium is provided for storing a computer program for causing a computer to perform the method of any one of the first to fourth aspects described above.

In a fifteenth aspect, there is provided a computer program product comprising computer program instructions for causing a computer to perform the method of any of the first to fourth aspects described above.

In a sixteenth aspect, there is provided a computer program which, when run on a computer, causes the computer to perform the method of any of the first to fourth aspects described above.

Through the technical solutions of the first aspect and the second aspect, before the STA switches from the source AP to the target AP, the STA may acquire the eBCS service information of the target AP. Therefore, after the STA is switched from the source AP to the target AP, signaling interaction with the target AP is not needed, the STA can receive the eBCS data according to the eBCS service information of the target AP, the time delay of the STA for receiving the eBCS data is reduced, and the data packet loss rate is reduced. And further, the eBCS service in the process of switching the AP by the STA is optimized.

Through the technical solutions of the third and fourth aspects, the STA acquires the eBCS service information of at least one candidate AP from the source AP, determines the target AP from the at least one candidate AP, and receives the eBCS data of the target AP according to the eBCS service information of the target AP after the STA switches from the source AP to the target AP. Therefore, after the STA is switched from the source AP to the target AP, signaling interaction with the target AP is not needed, the STA can receive the eBCS data according to the eBCS service information of the target AP, time delay of the STA for receiving the eBCS data is reduced, and data packet loss rate is reduced. And further, the eBCS service in the process of switching the AP by the STA is optimized.

Drawings

Fig. 1 is a schematic diagram of a communication system architecture to which an embodiment of the present application is applied.

Fig. 2 is a schematic flowchart of an eBCS service handover across APs in an association scenario provided in the present application.

Fig. 3 is a schematic flowchart of an eBCS service handover across APs in an unassociated scenario provided by the present application.

Fig. 4 is a scene diagram of downlink eBCS handover applied in the embodiment of the present application.

Fig. 5 is a schematic flow chart of a method of wireless communication provided according to an embodiment of the application.

Fig. 6 is a schematic diagram of an FT request frame provided according to an embodiment of the present application.

Fig. 7 is a schematic diagram of an FT response frame provided according to an embodiment of the present application.

Fig. 8 is a schematic flowchart of an eBCS service handover across APs in an association scenario provided in an embodiment of the present application.

Fig. 9 is an illustrative diagram of an enhanced broadcast request ANQP element provided in accordance with an embodiment of the present application.

Fig. 10 is an exemplary diagram of another enhanced broadcast request ANQP element provided in accordance with an embodiment of the present application.

Fig. 11 is a schematic diagram of an enhanced broadcast response ANQP element provided in accordance with an embodiment of the present application.

Fig. 12 is a schematic diagram of a response target AP information field according to an embodiment of the present application.

Fig. 13 is a schematic flowchart of an eBCS service handover across APs in an unassociated scenario according to an embodiment of the present application.

Fig. 14 is a schematic flow chart diagram of another method of wireless communication provided in accordance with an embodiment of the present application.

Fig. 15 is an exemplary diagram of yet another enhanced broadcast request ANQP element provided in accordance with an embodiment of the present application.

Fig. 16 is an illustrative diagram of another enhanced broadcast response ANQP element provided in accordance with an embodiment of the present application.

Fig. 17 is a schematic block diagram of a station device provided according to an embodiment of the present application.

Fig. 18 is a schematic block diagram of an access point device provided according to an embodiment of the present application.

Fig. 19 is a schematic block diagram of another station apparatus provided in accordance with an embodiment of the present application.

Fig. 20 is a schematic block diagram of another access point device provided in accordance with an embodiment of the present application.

Fig. 21 is a schematic block diagram of a communication device provided according to an embodiment of the present application.

FIG. 22 is a schematic block diagram of an apparatus provided in accordance with an embodiment of the present application.

Fig. 23 is a schematic block diagram of a communication system provided in accordance with an embodiment of the present application.

Detailed Description

Technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art without making any creative effort with respect to the embodiments in the present application belong to the protection scope of the present application.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: wireless Local Area Networks (WLANs), wireless Fidelity (WiFi), or other communication systems, among others.

For example, a communication system 100 applied in the embodiment of the present application is shown in fig. 1. The communication system 100 may include an Access Point (AP) device 110, and a STATION (STA) device 120 that accesses a network through the Access Point device 110.

In the embodiment of the application, the STA device may be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.).

In this embodiment, the STA device may be a Mobile Phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) device, an Augmented Reality (AR) device, a wireless device in industrial control (industrial control), a wireless device in unmanned driving (self driving), a wireless device in remote medical (remote medical), a wireless device in smart grid (smart grid), a wireless device in transportation safety (transportation safety), a wireless device in smart city (smart city), or a wireless device in home (smart home), and the like.

By way of example and not limitation, in embodiments of the present application, the STA device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. The wearable device may be worn directly on the body or may be a portable device integrated into the user's clothing or accessory. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

Fig. 1 exemplarily shows one AP and two STAs, and optionally, the communication system 100 may include a plurality of APs and include other numbers of STAs, which is not limited in this embodiment of the present invention.

It should be understood that a device having a communication function in a network/system in the embodiments of the present application may be referred to as a communication device. Taking the communication system 100 shown in fig. 1 as an example, the communication device may include an access point 110 and a station 120 having a communication function, and the access point 110 and the station 120 may be the specific devices described above and are not described again here; the communication device may also include other devices in the communication system 100, such as other network entities like a network controller, a gateway, etc., which are not limited in this embodiment.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be understood that "indication" mentioned in the embodiments of the present application may be a direct indication, an indirect indication, or an indication of an association relationship. For example, a indicates B, which may mean that a directly indicates B, e.g., B may be obtained by a; it may also mean that a indicates B indirectly, for example, a indicates C, and B may be obtained by C; it can also mean that there is an association between a and B.

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application. The terms "first," "second," "third," and "fourth," etc. in the description and claims of this application and in the accompanying drawings are used for distinguishing between different elements and not for describing a particular sequential order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, the term "correspond" may indicate that there is a direct correspondence or an indirect correspondence between the two, may also indicate that there is an association between the two, and may also indicate and be indicated, configure and configured, and so on.

In the embodiment of the present application, "predefining" may be implemented by saving a corresponding code, table, or other manners that may be used to indicate related information in advance in a device (for example, including a terminal device and a network device), and the present application is not limited to a specific implementation manner thereof. Such as predefined, may refer to what is defined in the protocol.

In the embodiment of the present application, the "protocol" may refer to a standard protocol in the communication field, and may include, for example, a WiFi protocol and a related protocol applied in a future WiFi communication system, which is not limited in this application.

In order to better understand the embodiment of the present application, the STA receiving the eBCS service across APs related to the present application will be described.

The solution of the 802.11bc protocol for STA cross-AP receiving eBCS service is as follows: after moving from the Current AP (Current AP) to the Target AP (Target AP), eBCS service discovery and data reception are carried out again at the Target AP. The handover scenarios can be classified into the following two categories according to whether the eBCS service needs to be associated:

(1) The service switching scheme of the eBCS that needs to be associated, as shown in fig. 2, may specifically include the following S11 to S18.

S11, the STA monitors Beacon (Beacon) frames sent by surrounding APs to select a Target AP to be connected, and clock synchronization with the Target AP is realized by using the Beacon frames sent by the Target AP;

if Fast BSS Transition (FT) switching is selected, executing S12 and S13;

s12, performing FT Request (Request) frame/FT Response (Response) frame interaction between the STA and the Target AP;

s13, the STA and the Target AP carry out re-association Request (re-association Request) frame/re-association Response (re-association Response) frame interaction, so that re-association of the STA and the Target AP is realized, and FT switching is completed;

if the normal reassociation is selected, executing step S14;

s14, performing Association Request (Association Request) frame/Association Response (Association Response) frame interaction and 4-way handshake (4-way handshake) Association by the STA and the Target AP;

s15, the STA sends an eBCS service request frame to the Target AP to request an eBCS service identified by a Content identification (Content ID);

s16, the target AP sends an eBCS service response frame to the STA to inform the STA of the eBCS service time dimension information;

if the eBCS service is a Public Key Frame Authentication (PKFA) or Hash Chain Frame Authentication (HCFA) Authentication mode, then step S17 is executed;

s17, the STA waits for receiving an information (Info) frame and then receives eBCS data of the Target AP;

if the eBCS service is a high Layer resource Authentication (HLSA) Authentication method, perform step S18;

and S18, the STA receives eBCS data of the Target AP within a specified time.

(2) The service switching scheme of the eBCS that does not need to be associated may specifically include the following S21-S25 as shown in fig. 2.

S21, the STA monitors Beacon frames sent by surrounding APs to select a Target AP to be connected, and realizes clock synchronization with the Target AP by receiving the Beacon frames sent by the Target AP;

s22, an STA sends a General Advertisement Service (GAS) Initial Request (Initial Request) frame carrying an Enhanced Broadcast Request Access Network Query Protocol (ANQP) element (Enhanced Broadcast Request ANQP-element) to Request a Target AP for registering eBCS Service;

s23, returning a GAS Initial Response (Initial Response) frame by the target AP, wherein the GAS Initial Response frame carries an Enhanced Broadcast Service (Enhanced Broadcast Service) ANQP-element and an Enhanced Broadcast Response (Enhanced Broadcast Service) ANQP-element to inform the STA of requesting eBCS Service time dimension information;

if the eBCS service is in a PKFA or HCFA authentication mode, executing a step S24;

s24, the STA waits for receiving the Info frame and then receives eBCS data of the Target AP;

if the eBCS service is in the HLSA authentication mode, step S25 is executed;

and S25, the STA receives eBCS data of the Target AP within a specified time.

(1) When the eBCS service is switched across APs in association, the eBCS service of Target AP must be requested again through an eBCS service request frame/eBCS service response frame, and for the eBCS service authenticated by PKFA, non-instant authenticated HCFA (HCFA with instant authentication), and instant authenticated HCFA with instant authentication, the eBCS data authentication must be completed after waiting for the arrival of the Info frame, and the Info frame interval is large because the Info frame takes the Target Beacon Transmission Time (TBTTs) as the period. For eBCS data authenticated by PKFA and HCFA with instant authentication, the eBCS data authentication information can be obtained only after the arrival of an Info frame, which leads to the increase of eBCS data receiving delay and data authentication delay, while for eBCS data authenticated by HCFA with instant authentication, the received data is lost before the eBCS authentication information in the Info frame is received, which leads to the increase of eBCS data packet loss rate.

(2) When the eBCS service is switched across APs without association, the eBCS service of the Target AP must be requested again through Enhanced Broadcast Request ANQP-element and Enhanced Broadcast Response ANQP-element. Aiming at eBCS services authenticated by PKFA, HCFA with instant authentication and HCFA with instant authentication, eBCS data authentication can be completed only after an Info frame arrives, and the Info frame interval is very large because the Info frame takes TBTTs as a period. For eBCS data authenticated by PKFA and HCFA with instant authentication, the eBCS data authentication information can be obtained only after the arrival of an Info frame, which leads to the increase of eBCS data receiving delay and data authentication delay, while for eBCS data authenticated by HCFA with instant authentication, the received data is lost before the eBCS authentication information in the Info frame is received, which leads to the increase of eBCS data packet loss rate.

The 802.11bc standard explicitly supports STA mobility, which may cause the STA to receive the eBCS service across APs due to mobility, and at this time, the problem of continuous reception of the eBCS service across APs needs to be solved. The 802.11 protocol provides an FT mechanism for realizing fast association when the STA moves across APs, but the FT mechanism design does not consider the eBCS service characteristics at the beginning, and cannot realize fast discovery and data authentication of the eBCS service across APs. In addition, the FT mechanism is only applicable to an association scenario, and in a non-association scenario, there is also a situation where the STA receives the eBCS service across the AP, so that in the non-association scenario, a cross-AP eBCS service rapid discovery and data authentication mechanism needs to be designed, thereby improving the eBCS service experience when the STA switches across APs.

Based on the technical problem, the present application provides a scheme for acquiring the eBCS service information of the target AP, where before the STA switches from the source AP to the target AP, the STA acquires the eBCS service information of the target AP. Therefore, after the STA is switched from the source AP to the target AP, signaling interaction with the target AP is not needed, the STA can receive the eBCS data according to the eBCS service information of the target AP, time delay of the STA for receiving the eBCS data is reduced, and data packet loss rate is reduced. And further, the eBCS service in the process of switching the AP by the STA is optimized.

The application scenario is as follows: under an Extended Service Set (ESS), there are multiple Basic Service Sets (BSSs), where each AP has a limited signal coverage, and a STA connects to a Current AP (Current AP) and receives an eBCS Service. When the STA is about to leave the coverage of the Current AP due to mobility, it needs to implement eBCS service discovery and authentication with the Target AP to ensure eBCS service continuity, as shown in fig. 4.

The technical solution of the present application is detailed below by specific examples.

Fig. 5 is a schematic flow chart of a method 200 of wireless communication according to an embodiment of the present application, and as shown in fig. 5, the method 200 of wireless communication may include at least some of the following:

s210, before the STA is switched from a source AP to a target AP, the source AP sends eBCS service information of the target AP to the STA;

s220, before the STA switches from the source AP to the target AP, the STA acquires the eBCS service information of the target AP from the source AP.

In the embodiment of the present application, due to mobility, the STA needs to be handed over from the source AP to the target AP. The source AP is the AP currently serving the STA, and therefore, the source AP may also be referred to as the current AP, for example, as shown in fig. 4.

In some embodiments, before a STA switches from a source AP to a target AP, the source AP may proactively send the eBCS service information of the target AP to the STA. For example, the source AP actively acquires the eBCS service information of the target AP from the target AP, and sends the eBCS service information of the target AP to the STA.

In some embodiments, prior to a STA switching from a source AP to a target AP, the source AP may send eBCS service information for the target AP to the STA based on the STA's request. For example, the source AP acquires the eBCS service information of the target AP from the target AP based on the request of the STA, and sends the eBCS service information of the target AP to the STA.

In some embodiments, in an association scenario between a STA and an AP, based on the FT mechanism, the structure of the FT request frame and the FT response frame may be modified, so that the fast discovery and data authentication of the eBCS service across APs in the association scenario may be achieved.

Embodiment 1, the STA sends first information to the source AP, where the first information is used to request eBCS service information of the target AP, and the first information at least includes a content identifier of the eBCS of the target AP; and the STA receives second information sent by the source AP, wherein the second information at least comprises eBCS service information of the target AP.

In some implementations of embodiment 1, the first information is sent via a fast basic service set handover, FT, request frame.

In some implementations, the FT request frame includes a first eBCS handover element (ETE), the first ETE is used to store eBCS service handover information, and the first ETE includes a content identifier of an eBCS of the target AP.

In some implementations, the first ETE further includes a first eBCS response control field including a first switch Time information (Transition Time Info) bit and a first switch Authentication information (Transition Authentication Info) bit; wherein, the value of the first switching time information indication bit indicates that the first ETE does not have a switching time information field for indicating the switching time information of the eBCS of the target AP; the value of the first handover authentication information indication bit indicates that the first ETE does not have a handover authentication information field for indicating handover authentication information of the eBCS of the target AP.

Specifically, for example, the first handover time information indication bit is used to indicate whether the first ETE has a handover time information field for indicating handover time information of the eBCS of the target AP. For example, the first switching time information indication bit is 0, indicating that the first ETE does not have a switching time information field for indicating the switching time information of the eBCS of the target AP. For another example, the first handover time information indication bit takes a value of 1, indicating that the first ETE has a handover time information field for indicating the handover time information of the eBCS of the target AP.

Specifically, for example, the first handover authentication information indication bit is used to indicate whether the first ETE has a handover authentication information field for indicating handover authentication information of the eBCS of the target AP. For example, the first handover authentication information indication bit takes a value of 0, which indicates that the first ETE does not have a handover authentication information field for indicating handover authentication information of the eBCS of the target AP. For another example, the first handover authentication information indication bit takes a value of 1, indicating that the first ETE has a handover authentication information field for indicating handover authentication information of the eBCS of the target AP.

Specifically, as shown in fig. 6, the FT request frame (the number of occupied bytes is set according to the requirement) includes a Robust Security Network Element (RSNE) (the number of occupied bytes is set according to the requirement), a Mobile Domain Element (MDE) (the number of occupied bytes is set according to the requirement), a fast handover element (FT element, FTE) (the number of occupied bytes is set according to the requirement), and an ETE (the number of occupied bytes is set according to the requirement). As shown in fig. 6, the ETE includes an Element identifier (Element ID) (occupying 1 byte), a Length (Length) (occupying 1 byte), a Content identifier (Content ID) (occupying 1 byte), and an eBCS response control (occupying 1 byte), and the eBCS response control includes a switching Time information indicator (Transition Time info Present) (occupying 1 bit, such as B0), a switching Authentication information indicator (Transition Authentication info Present) (occupying 1 bit, such as B1), and a reservation (Reserved) (occupying 6 bits, such as B2 to B7).

As shown in fig. 6, the FT request frame may further include information such as category (occupying 1 byte), FT Action (FT Action) (occupying 1 byte), STA address (occupying 6 bytes), target AP address (occupying 6 bytes), and the like.

It should be noted that the content id field in fig. 6 is used to indicate the content id of the eBCS of the target AP. The ETE in fig. 6 corresponds to the first ETE, the eBCS response control field corresponds to the first eBCS response control field, the handover time information indicator bit corresponds to the first handover time information indicator bit, and the handover authentication information indicator bit corresponds to the first handover authentication information indicator bit.

In some implementations of embodiment 1, the second information is sent via an FT response frame.

In some implementations, the FT response frame includes a second ETE, the second ETE is used for storing eBCS service switching information, and the second ETE includes eBCS service information of the target AP.

In some implementations, the second ETE further includes a handover time information field for indicating handover time information of the eBCS of the target AP, a handover authentication information field for indicating handover authentication information of the eBCS of the target AP;

wherein, the eBCS service information of the target AP comprises switching time information and switching authentication information of the eBCS of the target AP.

In some implementations, the second ETE further includes a second eBCS response control field including a second handover time information indication bit and a second handover authentication information indication bit; the value of the second switching time information indication bit indicates that the second ETE has the switching time information field, and the value of the second switching authentication information indication bit indicates that the second ETE has the switching authentication information field.

For example, the second handover time information indication bit is used to indicate whether the second ETE has a handover time information field for indicating handover time information of the eBCS of the target AP. For example, the second eti has a value of 0 indicating that the second eti does not have the switching time information field. For another example, the second eti has a value of 1 to indicate that the second eti has the switching time information field.

For a specific example, the second handover authentication information indication bit is used to indicate whether the second ETE has a handover authentication information field for indicating handover authentication information of the eBCS of the target AP. For example, the second eti indicates that the bit value is 0, indicating that the second eti does not have the handover authentication information field. For another example, the second handover authentication information indication bit value is 1, indicating that the second ETE has the handover authentication information field.

In some implementations, the switching time information field includes at least one of:

a bit for indicating the duration of the Service Period (SP) of the eBCS of the target AP, a bit for indicating the interval of the Service Period of the eBCS of the target AP, and a bit for indicating the next eBCS Service start time.

In some implementations, the handover authentication information field includes a first authentication algorithm bit; wherein, the value of the first authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

In some implementations, in a case that the first authentication algorithm bit takes a first value, the authentication method used by the eBCS service of the target AP is HLSA;

under the condition that the first authentication algorithm bit takes a second value, the authentication mode used by the eBCS service of the target AP is PKFA, and the switching authentication information field further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowed time difference;

under the condition that the first authentication algorithm bit takes a third value, the authentication mode used by the eBCS service of the target AP is HCFA of non-instant authentication, and the switching authentication information field further comprises at least one of a bit for indicating the allowed time difference, a bit for indicating the eBCS information frame interval, a bit for indicating the HCFA key change interval and a bit for indicating the HCFA basic key;

in case that the first authentication algorithm bit takes the fourth value, the authentication mode used by the eBCS service of the target AP is the HCFA of the instant authentication, and the handover authentication information field further includes at least one of a bit indicating the allowable time difference, a bit indicating the number of instant authenticators, a bit indicating the hash distance of the instant authentication, and a bit indicating the instant authenticators.

In some implementations, the authentication algorithm corresponding to the first authentication algorithm bit value can be as shown in table 1 below. That is, the first value corresponds to a value 0 in table 1, the second value corresponds to a value 1 in table 1, the third value corresponds to a value 2 in table 1, and the fourth value corresponds to a value 3 in table 1.

TABLE 1

Value taking	Authentication algorithm
		0	HLSA
1	PKFA
		2	HCFA for non-instant authentication
3	Instant authenticated HCFA
		4-255	Reservation

Specifically, as shown in fig. 7, the FT response frame (the number of occupied bytes is set according to the requirement) includes RSNE (the number of occupied bytes is set according to the requirement), MDE (the number of occupied bytes is set according to the requirement), FTE (the number of occupied bytes is set according to the requirement), and ETE (the number of occupied bytes is set according to the requirement). As shown in fig. 7, the ETE includes an Element identifier (Element ID) (occupying 1 byte), a Length (Length) (occupying 1 byte), a Content identifier (Content ID) (occupying 1 byte), an eBCS response control (occupying 1 byte), switching Time information (Transition Time info) (occupying byte number set according to a requirement), and switching Authentication information (Transition Authentication info) (occupying byte number set according to a requirement).

As shown in fig. 7, the eBCS response control includes a handover Time information indication (Transition Time info Present) (takes 1 bit, e.g., B0), a handover Authentication information indication (Transition Authentication info Present) (takes 1 bit, e.g., B1), and a reservation (Reserved) (takes 6 bits, e.g., B2 to B7).

As shown in fig. 7, the switching time information field includes an eBCS SP duration (occupying 0 or 2 bits), an eBCS SP interval (occupying 0 or 2 bits), and a next eBCS service start time (occupying 0 or 2 bits). The eBCS SP duration bit is used to indicate the duration of the SP of the eBCS of the target AP, the eBCS SP interval bit is used to indicate the interval of the SP of the eBCS of the target AP, and the next eBCS service start time bit is used to indicate the next eBCS service start time.

As shown in fig. 7, the handover authentication information field includes an authentication algorithm (takes 1 bit). In addition, the handover authentication information field further includes some optional parameters, for example, a certificate length (occupying 0 or 2 bits), a certificate (occupying bits are set according to requirements), an allowed time difference (occupying 0 or 2 bits), an HCFA basic key (occupying bits are set according to requirements), an HCFA key change interval (occupying 0 or 1 bit), an eBCS information frame interval (occupying 0 or 1 bit), the number of instant authenticators (occupying 0 or 1 bit), a hash distance of instant authentication (occupying N x 1 bit), and an instant authenticator (occupying N x 32 bits). The authentication algorithm bit is used for indicating an authentication algorithm used by an eBCS service of the target AP, the certificate length bit is used for indicating the certificate length, the certificate bit is used for indicating the certificate, the allowed time difference bit is used for indicating the allowed time difference, the HCFA basic key bit is used for indicating the HCFA basic key, the HCFA key change interval bit is used for indicating the HCFA key change interval, the eBCS information frame interval bit is used for indicating the eBCS information frame interval, the number bit of the instant authenticators is used for indicating the number of the instant authenticators, the hash distance bit of the instant authenticators is used for indicating the hash distance of the instant authenticators, and the instant authenticators bit is used for indicating the instant authenticators.

As shown in fig. 7, the FT response frame may further include information such as category (occupying 1 byte), FT Action (occupying 1 byte), STA address (occupying 6 bytes), target AP address (occupying 6 bytes), status code (occupying 2 bytes), and the like.

Note that, the content id field in fig. 7 is used to indicate the content id of the eBCS of the target AP. The ETE in fig. 7 corresponds to the second ETE, the eBCS response control field corresponds to the second eBCS response control field, the handover time information indicator bit corresponds to the second handover time information indicator bit, and the handover authentication information indicator bit corresponds to the second handover authentication information indicator bit.

In some implementations of embodiment 1, after the STA associates with the target AP, the STA receives the eBCS data of the target AP according to the eBCS service information of the target AP.

In some implementations of embodiment 1, the eBCS service information of the target AP is obtained by the source AP from the target AP.

In some implementations, as shown in fig. 8, in embodiment 1, the STA may specifically implement the handover through S31 to S36.

S31, when the STA decides to switch, the STA sends an FT request frame to a source AP (also called Current AP); wherein, the EBCS Transition Element (ETE) in the FT request frame contains the Content ID of the eBCS service requested by the STA (namely the Content identification of the eBCS of the target AP);

s32, the target AP returns an FT response frame, wherein an EBCS Transition Element (ETE) in the FT response frame comprises a Content ID (namely the Content identification of the eBCS of the target AP), a switching Time information (optional) field and a switching Authentication information (optional) field of the eBCS service;

s33, the STA sends a Reassociation Request (Reassociation Request) frame to the target AP to initiate a Reassociation Request;

s34, the target AP replies a Reassociation Response (Reassociation Response) frame to the STA to respond to the Reassociation request;

s35, the STA receives eBCS data of the target AP at a set time;

if the STA does not receive the information of the transmission Authentication information field, step S36 is executed;

and S36, the STA buffers the received Data (Data) frame and waits for a received information (Info) frame.

It should be noted that, for the description of the FT request frame and the FT response frame, reference may be made to the above related description, and details are not described here again.

In some embodiments, in a non-association scenario of the STA and the AP, the structure of an Enhanced Broadcast Request ANQP-element (Enhanced Broadcast Request ANQP-element) and an Enhanced Broadcast Response ANQP-element (Enhanced Broadcast Response ANQP-element) in a GAS Request frame and a GAS Response frame are modified to support rapid discovery and data authentication of an eBCS service across APs in the non-association scenario.

For example, the GAS request frame may be a GAS initial request frame and the GAS response frame may be a GAS initial response frame.

Embodiment 2, the STA sends a third message to the source AP, where the third message is used to request eBCS Service information of the target AP, and the third message includes a Basic Service Set Identifier (BSSID) of the target AP; and the STA receives fourth information sent by the source AP, wherein the fourth information at least comprises eBCS service information of the target AP.

In some implementations of embodiment 2, the third information is sent via a GAS request frame, wherein the GAS request frame includes an enhanced broadcast request ANQP element that includes a BSSID of the target AP.

In some implementations, the enhanced broadcast request ANQP element includes a first field and a second field; wherein the first field is used to indicate that the enhanced broadcast request ANQP element requests the expiration time of the eBCS service requested by the STA from the source AP, and the second field is used to indicate the BSSID of the target AP.

In some implementations, the enhanced broadcast request ANQP element further includes a first eBCS request control field including a first bit, a second bit, and a third bit; wherein, the first and the second end of the pipe are connected with each other,

a value of the first bit indicates that the enhanced broadcast request ANQP element includes the first field;

the value of the second bit indicates that the enhanced broadcast request ANQP element is used to request authentication information of the source AP;

a value of the third bit indicates that the enhanced broadcast request ANQP element includes the second field.

Specifically, as shown in fig. 9, the enhanced Broadcast request ANQP element (occupying byte number set according To the requirement) in the GAS request frame includes an eBCS request control (occupying 1 byte), a Broadcast Action (Broadcast Action) (occupying 1 byte), a content identifier (occupying 1 byte), a Termination Time (Requested Time To Termination) (occupying 0 or 4 bytes), and a BSSID of the target AP (occupying 0 or 6 bytes). As shown in fig. 9, the eBCS Request control field includes a Requested end Time indication (Requested Time To Termination Present) (1 bit, for example, B0), a Requested Authentication information (Requested Authentication Info) (1 bit, for example, B1), a Requested Target AP information indication (Requested Target AP Info Present) (1 bit, for example, B2), and a reservation (5 bits, for example, B3 To B7).

It should be noted that, the eBCS request control field in fig. 9 corresponds to the first eBCS request control field, the requested expiration time field corresponds to the first field, the BSSID field of the target AP corresponds to the second field, the requested expiration time indication bit corresponds to the first bit, the requested authentication information bit corresponds to the second bit, and the requested target AP information indication bit corresponds to the third bit.

In some implementations, the enhanced broadcast request ANQP element includes a broadcast action field and a field to indicate a BSSID of the target AP; wherein, the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests the eBCS service information of the target AP.

Specifically, as shown in fig. 10, the enhanced Broadcast request ANQP element (occupying byte number set according To requirement) in the GAS request frame includes Broadcast Action (occupying 1 byte), content identifier (occupying 1 byte), termination Time of request (occupied 0 or 4 bytes), and BSSID of target AP (occupying 0 or 6 bytes). Wherein, the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of the target AP.

Specifically, the contents of the broadcast action field may be as shown in table 2 below.

TABLE 2

Value (Value)	Description (Description)
		0-1	Reservation
2	Registered reception of broadcasts
		3	Injecting from receiving broadcasts
4	Registration with a broadcast service identified by a content ID
		5	Deregistering a broadcast service identified by a content ID
6	Registering with a broadcast service identified by a content ID and requesting identity authentication information of a current AP
		7	Registering with a broadcast service identified by a content ID and requesting handover information of a target AP

It should be noted that, in table 2, when the value of the broadcast action field is 6, the enhanced broadcast request ANQP element is used to request the authentication information of the Current AP (i.e., the source AP); when the value of the broadcast action field is 7, the enhanced broadcast request ANQP element is used to request handover information of a Target AP (Target AP). Wherein the BSSID field of the Target AP is added to the enhanced broadcast request ANQP element for storing the BSSID of the Target AP, as shown in fig. 10.

Specifically, the value of the broadcast action field in fig. 10 may be the value 7 in table 2 above, to indicate that the enhanced broadcast request ANQP element requests eBCS service information of the target AP.

In some implementations of embodiment 2, the fourth information is sent via a GAS response frame, wherein the GAS response frame includes an enhanced broadcast response ANQP element that includes the eBCS service information for the target AP.

In some implementations, the enhanced broadcast response ANQP element includes a target AP information field, where the target AP information field is used to indicate eBCS service information for the target AP.

In some implementations, the enhanced broadcast response ANQP element also includes an authentication information field to indicate authentication information used by the eBCS of the source AP.

In some implementations, the enhanced broadcast response ANQP element further includes a third eBCS response control field including a fourth bit and a fifth bit; wherein the content of the first and second substances,

the value of the fourth bit indicates that the enhanced broadcast response ANQP element includes an authentication information field of the source AP;

a value of the fifth bit indicates that the enhanced broadcast response ANQP element includes the target AP information field.

In some implementations, the target AP information field includes at least one of:

a field for indicating the duration of the service period of the eBCS of the target AP, a field for indicating the interval of the service period of the eBCS of the target AP, a field for indicating the next eBCS service start time, and an authentication information field of the target AP for indicating authentication information used by the eBCS of the target AP.

In some implementations, the authentication information field of the target AP includes second authentication algorithm bits; wherein, the value of the second authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

In some implementations, in a case that the bit of the second authentication algorithm takes the fifth value, the authentication manner used by the eBCS service of the target AP is HLSA;

and under the condition that the bit of the second authentication algorithm takes a sixth value, the authentication mode used by the eBCS service of the target AP is PKFA, and the authentication information field of the target AP further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowable time difference.

Specifically, as shown in fig. 11, the enhanced Broadcast Response ANQP element (the number of occupied bytes is set according to the requirement) in the GAS Response frame includes an eBCS Response control (1 byte occupied), a content identifier (1 byte occupied), broadcast Service transmission (Broadcast Service transmission) (1 byte occupied), source AP authentication information (the number of occupied bytes is set according to the requirement), and Response Target AP information (Response Target AP Info) (the number of occupied bytes is set according to the requirement). As shown in fig. 11, the eBCS Response control field includes a Response Authentication information indication (Response Authentication information Present) (1 bit is occupied, e.g., B0), a Response Target AP information indication (Response Target AP Info Present) (1 bit is occupied, e.g., B1), and a reservation (6 bits are occupied, e.g., B2 to B7).

As shown in fig. 12, the response target AP information field includes an eBCS SP duration (occupying 1 byte), an eBCS SP interval (occupying 1 byte), a next eBCS service start time (occupying 1 byte), and target AP authentication information (the number of occupied bytes is set according to the requirement). As shown in fig. 12, the target AP authentication information field includes an authentication algorithm (occupies 1 bit). In addition, the target AP authentication information field also includes some optional parameters, such as the length of the certificate (occupying 0 or 2 bits), the certificate (the number of occupied bits is set according to the requirement), and the allowable time difference (occupying 0 or 2 bits). The bit of the authentication algorithm is used for indicating the authentication algorithm used by the eBCS service of the target AP, the bit of the certificate length is used for indicating the length of the certificate, the bit of the certificate is used for indicating the certificate, and the bit of the allowed time difference is used for indicating the allowed time difference.

As shown in fig. 12, the eBCS SP duration field is used to indicate the duration of the SP of the eBCS of the target AP, the eBCS SP interval field is used to indicate the interval of the SP of the eBCS of the target AP, and the next eBCS service start time field is used to indicate the next eBCS service start time. The target AP authentication information field corresponds to the authentication information field of the target AP for indicating the authentication information used by the eBCS of the target AP.

It should be noted that, the eBCS response control field in fig. 11 corresponds to the third eBCS response control field, the source AP authentication information field corresponds to the authentication information field for indicating the authentication information used by the eBCS of the source AP, the response target AP information field corresponds to the target AP information field, the indication bit of the response authentication information corresponds to the fourth bit, and the indication bit of the response target AP information corresponds to the fifth bit.

In some implementations of embodiment 2, after the STA switches from the source AP to the target AP, the STA receives the eBCS data of the target AP according to the eBCS service information of the target AP.

In some implementations of embodiment 2, the eBCS service information of the target AP is obtained by the source AP from an Advertisement Server (Advertisement Server).

In some implementations, as shown in fig. 13, in embodiment 2, the STA may specifically implement the handover through S41 to S46.

S41, the STA receives a Beacon frame of a source AP (also called Current AP) and simultaneously receives Beacon frames of surrounding APs to determine BSSID of a Target AP (Target AP);

and S42, the STA sends a GAS request frame to the source AP to request the current eBCS service. The Enhanced Broadcast Request ANQP element (Enhanced Broadcast Request ANQP-element) further includes a BSSID of the Target AP, and is used to Request eBCS service information of the Target AP;

s43, the source AP sends the Request information to an Advertisement Server (Advertisement Server) in the form of a Query Request (Query Request);

s44, the advertisement Server returns the inquired information to the source AP in the form of Query Response (Query Response);

s45, the source AP replies a GAS response frame to the STA and returns the current eBCS service information. Meanwhile, the Enhanced Broadcast Response ANQP element (Enhanced Broadcast Response ANQP-element) also comprises a Response Target AP information (Response Target AP Info) field for storing eBCS service information of the Target AP;

and S46, the STA receives eBCS data of the Target AP within a specified time.

It should be noted that the GAS request frame in fig. 13 may also be a GAS initial request frame, and correspondingly, the GAS response frame may also be a GAS initial response frame. For the description of the enhanced broadcast request ANQP element and the enhanced broadcast response ANQP element, reference may be made to the related description above, which is not repeated herein.

Therefore, in the embodiment of the present application, before the STA switches from the source AP to the target AP, the STA may acquire the eBCS service information of the target AP. Therefore, after the STA is switched from the source AP to the target AP, signaling interaction with the target AP is not needed, the STA can receive the eBCS data according to the eBCS service information of the target AP, time delay of the STA for receiving the eBCS data is reduced, and data packet loss rate is reduced. And further, the eBCS service in the process of switching the AP by the STA is optimized.

Fig. 14 is a schematic flow chart of a method 300 of wireless communication according to an embodiment of the present application, and as shown in fig. 14, the method 300 of wireless communication may include at least some of the following:

s310, the source AP sends eBCS service information of at least one candidate AP to the STA;

s320, the STA acquires eBCS service information of the candidate AP from the source AP;

s330, the STA determines a target AP from the at least one candidate AP;

s340, after the STA switches from the source AP to the target AP, the STA receives the eBCS data of the target AP according to the eBCS service information of the target AP.

In the embodiment of the present application, due to mobility, the STA needs to be handed over from the source AP to the target AP. The source AP is the AP currently serving the STA, and therefore, the source AP may also be referred to as the current AP, for example, as shown in fig. 4 above.

In some embodiments, the source AP may proactively send the eBCS service information of the at least one candidate AP to the STA.

In some embodiments, the source AP may send the eBCS service information of the at least one candidate AP to the STA based on the request of the STA.

In some implementations, the STA determines the Target AP by listening to Beacon frames of surrounding APs, or lists all or part of the listened APs as Candidate (Candidate) APs, and then requests and returns information for either.

In some implementations, the eBCS service information for the at least one candidate AP is obtained by the source AP from an advertisement server. In some embodiments, in a scenario that a STA is not associated with an AP, the structure of an Enhanced Broadcast Request ANQP-element (Enhanced Broadcast Request ANQP-element) and an Enhanced Broadcast Response ANQP-element (Enhanced Broadcast Response ANQP-element) in a GAS Request frame and a GAS Response frame is modified to support rapid discovery and data authentication of an eBCS service across APs in a non-associated scenario.

In some embodiments, the STA sends first information to the source AP, the first information being used to request eBCS service information of the at least one candidate AP, the first information including a BSSID of the at least one candidate AP; and the STA receives second information sent by the source AP, wherein the second information at least comprises eBCS service information of the at least one candidate AP.

In some implementations, the first information is sent via a GAS request frame, where the GAS request frame includes an enhanced broadcast request ANQP element that includes a BSSID of the at least one candidate AP.

In some implementations, the enhanced broadcast request ANQP element includes a first field and a second field; wherein the first field is used to indicate that the enhanced broadcast request ANQP element requests the expiration time of the eBCS service requested by the STA from the source AP, and the second field is used to indicate the BSSID of the at least one candidate AP.

In some implementations, the enhanced broadcast request ANQP element further includes an eBCS request control field including a first bit, a second bit, and a third bit; wherein the content of the first and second substances,

Specifically, as shown in fig. 15, the enhanced Broadcast request ANQP element (the number of occupied bytes is set according To the requirement) in the GAS request frame includes an eBCS request control (1 byte occupied), a Broadcast Action (Broadcast Action) (1 byte occupied), a content identifier (1 byte occupied), and a Requested Time To Termination (0 or 4 bytes occupied). The enhanced broadcast request ANQP element also includes some optional parameters such as the BSSID of the target AP (occupying 0 or 6 bytes), the BSSID of candidate AP1 (occupying 0 or 6 bytes), the BSSID of candidate AP2 (occupying 0 or 6 bytes), \ 8230;, the BSSID of candidate AP N (occupying 0 or 6 bytes). As shown in fig. 15, the eBCS Request control field includes a Requested end Time indication (Requested Time To Termination Present) (1 bit, for example, B0), a Requested Authentication information (Requested Authentication Info) (1 bit, for example, B1), a Requested Target AP information indication (Requested Target AP Info Present) (1 bit, for example, B2), a Requested Candidate AP information indication (Requested Candidate AP Info Present) (1 bit, for example, B3), and a reservation (4 bits, for example, B4 To B7).

It should be noted that the BSSID field of the Target AP exists when the Request Target AP Info Present =1, and the BSSID field of the Candidate AP exists when the Request Candidate AP Info Present = 1. In the Present embodiment, the Request Candidate AP Info Present =1, that is, the BSSID field of Candidate AP exists.

It should be noted that, the eBCS request control field in fig. 15 corresponds to the first eBCS request control field, the requested switching time field corresponds to the first field, the BSSID field of the candidate AP corresponds to the second field, the requested end time indication bit corresponds to the first bit, the requested authentication information bit corresponds to the second bit, and the requested candidate AP information indication bit corresponds to the third bit.

In some implementations, the enhanced broadcast request ANQP element includes a broadcast action field and a field indicating a BSSID of the at least one candidate AP; wherein, the value of the broadcast action field is used to indicate that the request of the enhanced broadcast request ANQP element is the eBCS service information of the candidate AP.

In some implementations, the second information is sent via a GAS response frame, where the GAS response frame includes an enhanced broadcast response ANQP element that includes the eBCS service information for the at least one candidate AP.

In some implementations, the enhanced broadcast response ANQP element includes a candidate AP information field, wherein the candidate AP information field is to indicate eBCS service information for the at least one candidate AP.

In some implementations, the enhanced broadcast response ANQP element further includes an eBCS response control field including fourth and fifth bits; wherein, the first and the second end of the pipe are connected with each other,

a value of the fifth bit indicates that the enhanced broadcast response ANQP element includes the candidate AP information field.

In some implementations, the candidate AP information field includes at least one of:

a field for indicating the duration of the service period of the eBCS of each candidate AP, a field for indicating the interval of the service period of the eBCS of each candidate AP, a field for indicating the next eBCS service start time of each candidate AP, a target authentication information field for indicating the authentication information used by the eBCS of each candidate AP.

In some implementations, the authentication information field of the candidate AP includes authentication algorithm bits; the value of the bit of the authentication algorithm is used for indicating the authentication algorithm used by the eBCS service corresponding to the candidate AP.

In some implementations, when the bit of the authentication algorithm takes the first value, the authentication method used by the eBCS service of the corresponding candidate AP is HLSA;

and under the condition that the bit of the authentication algorithm takes a second value, the authentication mode used by the eBCS service of the corresponding candidate AP is PKFA, and the authentication information field of the candidate AP further comprises at least one of a bit for indicating the certificate, a bit for indicating the certificate length and a bit for indicating the allowed time difference.

It should be noted that, the specific structure of the candidate AP information field may be the parameter described above with respect to the response target AP information field in fig. 12, and for brevity, details are not repeated here.

Specifically, as shown in fig. 16, the enhanced Broadcast response ANQP element (the number of occupied bytes is set according to the requirement) in the GAS response frame includes an eBCS response control (1 byte occupied), a content identifier (1 byte occupied), a Broadcast Service transmission (1 byte occupied), and source AP authentication information (the number of occupied bytes is set according to the requirement). The enhanced broadcast response ANQP element also includes some optional parameters, such as Target AP information (Target AP Info) (the number of occupied bytes is set according to the requirement), candidate AP information (Candidate AP Info) (the number of occupied bytes is set according to the requirement). As shown in fig. 16, the eBCS Response control field includes a Response Authentication information indication (Response Authentication information Present) (1 bit, e.g., B0), a Response Target AP information indication (Response Target AP Info Present) (1 bit, e.g., B1), a Response Candidate AP information indication (Response Candidate AP Info Present) (1 bit, e.g., B3), and a reservation (4 bits, e.g., B4 to B7).

It should be noted that when the Response Target AP Info Present =1, the Target AP Info field exists, and when the Response Candidate AP Info Present =1, the Candidate AP Info field exists. In the Present embodiment, response chunk AP Info Present =1, i.e., the chunk AP Info field exists.

In some implementation manners, in this embodiment, the specific STA switching procedure may refer to the procedure shown in fig. 13, which is not described herein again.

Therefore, in the embodiment of the present application, the STA acquires the eBCS service information of at least one candidate AP from the source AP, determines the target AP from the at least one candidate AP, and receives the eBCS data of the target AP according to the eBCS service information of the target AP after the STA switches from the source AP to the target AP. Therefore, after the STA is switched from the source AP to the target AP, signaling interaction with the target AP is not needed, the STA can receive the eBCS data according to the eBCS service information of the target AP, time delay of the STA for receiving the eBCS data is reduced, and data packet loss rate is reduced. And further, the eBCS service in the process of switching the AP by the STA is optimized.

While method embodiments of the present application are described in detail above with reference to fig. 5-16, apparatus embodiments of the present application are described in detail below with reference to fig. 17-20, it being understood that apparatus embodiments correspond to method embodiments and that similar descriptions may be had with reference to method embodiments.

Fig. 17 shows a schematic block diagram of a station apparatus 400 according to an embodiment of the present application. The station apparatus 400 is an STA, and as shown in fig. 17, the station apparatus 400 includes:

a communication unit 410, configured to acquire, from a source access point AP, enhanced broadcast service eBCS service information of a target AP before a station STA switches from the source AP to the target AP.

In some embodiments, the communication unit 410 is specifically configured to:

sending first information to the source AP, wherein the first information is used for requesting eBCS service information of the target AP, and the first information at least comprises a content identification of eBCS of the target AP;

and receiving second information sent by the source AP, wherein the second information at least comprises eBCS service information of the target AP.

In some embodiments, the first information is sent via a fast basic service set handover, FT, request frame.

In some embodiments, the FT request frame includes a first eBCS handover element ETE, the first ETE is used for storing eBCS service handover information, and the first ETE includes a content identifier of an eBCS of the target AP.

In some embodiments, the first ETE further comprises a first eBCS response control field comprising first switching time information indication bits and first switching authentication information indication bits; wherein the content of the first and second substances,

the value of the first switching time information indication bit indicates that the first ETE does not have a switching time information field for indicating the switching time information of the eBCS of the target AP;

the value of the first handover authentication information indication bit indicates that the first ETE does not have a handover authentication information field for indicating handover authentication information of the eBCS of the target AP.

In some embodiments, the second information is sent via an FT response frame.

In some embodiments, the FT response frame includes a second ETE, the second ETE is used for storing eBCS service switching information, and the second ETE includes eBCS service information of the target AP.

In some embodiments, the second ETE further comprises a handover time information field for indicating handover time information of the eBCS of the target AP, a handover authentication information field for indicating handover authentication information of the eBCS of the target AP;

In some embodiments, the second ETE further comprises a second eBCS response control field comprising a second handover time information indication bit and a second handover authentication information indication bit; wherein the content of the first and second substances,

the value of the second switching time information indication bit indicates that the second ETE has the switching time information field, and the value of the second switching authentication information indication bit indicates that the second ETE has the switching authentication information field.

In some embodiments, the switching time information field includes at least one of:

a bit for indicating the duration of the service period of the eBCS of the target AP, a bit for indicating the interval of the service period of the eBCS of the target AP, and a bit for indicating the next eBCS service start time.

In some embodiments, the handover authentication information field includes a first authentication algorithm bit; wherein, the value of the first authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

In some embodiments, when the first authentication algorithm bit takes the first value, the authentication method used by the eBCS service of the target AP is high-level resource authentication HLSA;

under the condition that the first authentication algorithm bit takes a second value, the authentication mode used by the eBCS service of the target AP is public key frame authentication PKFA, and the switching authentication information field further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowed time difference;

under the condition that the bit of the first authentication algorithm takes a third value, the authentication mode used by the eBCS service of the target AP is a hash chain frame authentication HCFA of non-immediate authentication, and the switching authentication information field further comprises at least one of a bit for indicating the allowed time difference, a bit for indicating the eBCS information frame interval, a bit for indicating the HCFA key change interval and a bit for indicating the HCFA basic key;

In some embodiments, after the STA associates with the target AP, the communication unit 410 is further configured to receive eBCS data of the target AP according to eBCS service information of the target AP.

In some embodiments, the communication unit 410 is specifically configured to:

sending third information to the source AP, where the third information is used to request eBCS service information of the target AP, and the third information includes a basic service set identification BSSID of the target AP;

and receiving fourth information sent by the source AP, wherein the fourth information at least comprises eBCS service information of the target AP.

In some embodiments, the third information is sent via a generic broadcast service GAS request frame, wherein the GAS request frame includes an enhanced broadcast request access network query protocol, ANQP, element that includes a BSSID of the target AP.

In some embodiments, the enhanced broadcast request ANQP element includes a first field and a second field; wherein the first field is used for indicating that the enhanced broadcast request ANQP element requests the termination time of the eBCS service requested by the STA from the source AP, and the second field is used for indicating the BSSID of the target AP.

In some embodiments, the enhanced broadcast request ANQP element further includes a first eBCS request control field including a first bit, a second bit, and a third bit; wherein the content of the first and second substances,

the value of the second bit indicates that the enhanced broadcast request ANQP element is used to request the authentication information of the source AP;

In some embodiments, the enhanced broadcast request ANQP element includes a broadcast action field and a field to indicate a BSSID of the target AP; wherein, the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of the target AP.

In some embodiments, the fourth information is sent via a GAS response frame, wherein the GAS response frame includes an enhanced broadcast response ANQP element that includes the eBCS service information for the target AP.

In some embodiments, the enhanced broadcast response ANQP element includes a target AP information field, wherein the target AP information field is to indicate eBCS service information for the target AP.

In some embodiments, the enhanced broadcast response ANQP element further includes an authentication information field to indicate authentication information used by the eBCS of the source AP.

In some embodiments, the enhanced broadcast response ANQP element further includes a third eBCS response control field including fourth and fifth bits; wherein, the first and the second end of the pipe are connected with each other,

In some embodiments, the target AP information field includes at least one of:

In some embodiments, the authentication information field of the target AP includes second authentication algorithm bits; wherein, the value of the second authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

In some embodiments, when the bit of the second authentication algorithm takes the fifth value, the authentication manner used by the eBCS service of the target AP is HLSA;

and under the condition that the bit of the second authentication algorithm takes a sixth value, the authentication mode used by the eBCS service of the target AP is PKFA, and the authentication information field of the target AP further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowed time difference.

In some embodiments, after the STA switches from the source AP to the target AP, the communication unit 410 is further configured to receive eBCS data of the target AP according to eBCS service information of the target AP.

In some embodiments, the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on a chip.

It should be understood that the station device 400 according to the embodiment of the present application may correspond to a station device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the station device 400 are respectively for implementing a corresponding flow of an STA in the method 200 for wireless communication shown in fig. 5, and are not described herein again for brevity.

Fig. 18 shows a schematic block diagram of an access point device 500 according to an embodiment of the application. The access point device 500 is a source AP, and as shown in fig. 18, the access point device 500 includes:

a communication unit 510, configured to send enhanced broadcast service, eBCS, service information of a target AP to a station STA before the STA switches from a source access point AP to the target AP.

In some embodiments, the communication unit 510 is specifically configured to:

receiving first information sent by the STA, wherein the first information is used for requesting eBCS service information of the target AP, and the first information at least comprises a content identifier of the eBCS of the target AP;

and sending second information to the STA, wherein the second information at least comprises eBCS service information of the target AP.

In some embodiments, the first information is sent via a fast basic service set switching, FT, request frame.

In some embodiments, the first ETE further comprises a first eBCS response control field comprising a first switching time information indication bit and a first switching authentication information indication bit; wherein the content of the first and second substances,

In some embodiments, the second information is sent via an FT response frame.

In some embodiments, the second ETE further comprises a second eBCS response control field comprising a second handover time information indication bit and a second handover authentication information indication bit; wherein, the first and the second end of the pipe are connected with each other,

under the condition that the bit of the first authentication algorithm takes a third value, the authentication mode used by the eBCS service of the target AP is a hash chain frame authentication HCFA of non-immediate authentication, and the switching authentication information field further comprises at least one of a bit for indicating an allowed time difference, a bit for indicating an eBCS information frame interval, a bit for indicating an HCFA key change interval and a bit for indicating an HCFA basic key;

in case that the first authentication algorithm bit takes a fourth value, the authentication mode used by the eBCS service of the target AP is an HCFA for instant authentication, and the handover authentication information field further includes at least one of a bit indicating an allowable time difference, a bit indicating the number of instant authenticators, a bit indicating a hash distance for instant authentication, and a bit indicating an instant authenticator.

In some embodiments, the eBCS service information of the target AP is obtained by the source AP from the target AP.

In some embodiments, the communication unit 510 is specifically configured to:

receiving third information sent by the STA, wherein the third information is used for requesting eBCS service information of the target AP, and the third information comprises a Basic Service Set Identification (BSSID) of the target AP;

and sending fourth information to the STA, wherein the fourth information at least comprises eBCS service information of the target AP.

In some embodiments, the enhanced broadcast response ANQP element further comprises a third eBCS response control field comprising a fourth bit and a fifth bit; wherein, the first and the second end of the pipe are connected with each other,

In some embodiments, the target AP information field includes at least one of:

In some embodiments, the authentication information field of the target AP includes second authentication algorithm bits; and the value of the second authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

In some embodiments, in a case that the bit of the second authentication algorithm takes a fifth value, the authentication manner used by the eBCS service of the target AP is HLSA;

In some embodiments, the eBCS service information of the target AP is obtained by the source AP from an advertisement server.

It should be understood that the access point device 500 according to the embodiment of the present application may correspond to an access point device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the access point device 500 are respectively for implementing the corresponding flow of the source AP in the method 200 for wireless communication shown in fig. 5, and are not described herein again for brevity.

Fig. 19 shows a schematic block diagram of a station apparatus 600 according to an embodiment of the present application. The station apparatus 600 is an STA, and as shown in fig. 19, the station apparatus 600 includes:

a communication unit 610, configured to obtain enhanced broadcast service, eBCS, service information of at least one candidate AP from a source access point AP;

a processing unit 620, configured to determine a target AP from the at least one candidate AP;

after the STA is handed over from the source AP to the target AP, the communication unit 610 is further configured to receive eBCS data of the target AP according to the eBCS service information of the target AP.

In some embodiments, the communication unit 610 is specifically configured to:

sending first information to the source AP, wherein the first information is used for requesting eBCS service information of the at least one candidate AP and comprises Basic Service Set Identification (BSSID) of the at least one candidate AP;

and receiving second information sent by the source AP, wherein the second information at least comprises eBCS service information of the at least one candidate AP.

In some embodiments, the first information is sent via a generic broadcast service, GAS, request frame, wherein the GAS request frame includes an enhanced broadcast request access network query protocol, ANQP, element that includes a BSSID of the at least one candidate AP.

In some embodiments, the enhanced broadcast request ANQP element includes a first field and a second field; wherein the first field is used to indicate that the enhanced broadcast request ANQP element requests a termination time of the eBCS service requested by the STA from the source AP, and the second field is used to indicate a BSSID of the at least one candidate AP.

In some embodiments, the enhanced broadcast request ANQP element further includes an eBCS request control field including a first bit, a second bit, and a third bit; wherein, the first and the second end of the pipe are connected with each other,

In some embodiments, the enhanced broadcast request ANQP element includes a broadcast action field and a field indicating a BSSID of the at least one candidate AP; wherein, the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of a candidate AP.

In some embodiments, the second information is sent via a GAS response frame, wherein the GAS response frame includes an enhanced broadcast response ANQP element that includes eBCS service information for the at least one candidate AP.

In some embodiments, the enhanced broadcast response ANQP element includes a candidate AP information field, wherein the candidate AP information field is to indicate eBCS service information for the at least one candidate AP.

In some embodiments, the enhanced broadcast response ANQP element further includes an eBCS response control field including fourth and fifth bits; wherein the content of the first and second substances,

In some embodiments, the candidate AP information field includes at least one of:

a field for indicating the duration of the service period of the eBCS of each candidate AP, a field for indicating the interval of the service period of the eBCS of each candidate AP, a field for indicating the next eBCS service start time of each candidate AP, a target authentication information field for indicating authentication information used by the eBCS of each candidate AP.

In some embodiments, the authentication information field of the candidate AP includes authentication algorithm bits; wherein, the value of the bit of the authentication algorithm is used for indicating the authentication algorithm used by the eBCS service of the corresponding candidate AP.

In some embodiments, when the bit of the authentication algorithm takes the first value, the authentication manner used by the eBCS service of the corresponding candidate AP is HLSA;

It should be understood that the station device 600 according to the embodiment of the present application may correspond to the station device in the embodiment of the present application, and the above and other operations and/or functions of each unit in the station device 600 are respectively for implementing corresponding flows of the STA in the method 300 for wireless communication shown in fig. 14, and are not described herein again for brevity.

Fig. 20 shows a schematic block diagram of an access point device 700 according to an embodiment of the present application. The access point device 700 is a source AP, as shown in fig. 20, the access point device 700 includes:

a communication unit 710, configured to send enhanced broadcast service, eBCS, service information of at least one candidate AP to a station STA.

In some embodiments, the communication unit 710 is specifically configured to:

receiving first information sent by the STA, wherein the first information is used for requesting eBCS service information of the at least one candidate AP, and the first information comprises Basic Service Set Identification (BSSID) of the at least one candidate AP;

and sending second information to the STA, wherein the second information at least comprises eBCS service information of the at least one candidate AP.

In some embodiments, the second information is sent via a GAS response frame, wherein the GAS response frame includes an enhanced broadcast response ANQP element that includes the eBCS service information for the at least one candidate AP.

In some embodiments, the enhanced broadcast response ANQP element further comprises an eBCS response control field comprising a fourth bit and a fifth bit; wherein, the first and the second end of the pipe are connected with each other,

In some embodiments, the eBCS service information of the at least one candidate AP is obtained by the source AP from an advertisement server.

It should be understood that the access point device 700 according to the embodiment of the present application may correspond to an access point device in the method embodiment of the present application, and the above and other operations and/or functions of each unit in the access point device 700 are respectively for implementing the corresponding flow of the source AP in the method 300 for wireless communication shown in fig. 14, and are not described herein again for brevity.

Fig. 21 is a schematic structural diagram of a communication device 800 according to an embodiment of the present application. The communication device 800 shown in fig. 21 comprises a processor 810, and the processor 810 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

In some embodiments, as shown in fig. 21, communication device 800 may also include memory 820. From the memory 820, the processor 810 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 820 may be a separate device from the processor 810 or may be integrated into the processor 810.

In some embodiments, as shown in fig. 21, the communication device 800 may further include a transceiver 830, and the processor 810 may control the transceiver 830 to communicate with other devices, and specifically, may transmit information or data to the other devices or receive information or data transmitted by the other devices.

Transceiver 830 may include a transmitter and a receiver, among other things. The transceiver 830 may further include antennas, and the number of antennas may be one or more.

In some embodiments, the communication device 800 may specifically be an access point device in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the access point device in each method in the embodiment of the present application, which is not described herein again for brevity.

In some embodiments, the communication device 800 may specifically be a station device in the embodiment of the present application, and the communication device 800 may implement a corresponding process implemented by the station device in each method in the embodiment of the present application, which is not described herein again for brevity.

Fig. 22 is a schematic configuration diagram of an apparatus of an embodiment of the present application. The apparatus 900 shown in fig. 22 includes a processor 910, and the processor 910 can call and run a computer program from a memory to implement the method in the embodiment of the present application.

In some embodiments, as shown in fig. 22, the apparatus 900 may further include a memory 920. From the memory 920, the processor 910 can call and run a computer program to implement the method in the embodiment of the present application.

The memory 920 may be a separate device from the processor 910, or may be integrated in the processor 910.

In some embodiments, the apparatus 900 may also include an input interface 930. The processor 910 may control the input interface 930 to communicate with other devices or chips, and in particular, may obtain information or data transmitted by other devices or chips.

In some embodiments, the apparatus 900 may also include an output interface 940. The processor 910 may control the output interface 940 to communicate with other devices or chips, and in particular, may output information or data to the other devices or chips.

In some embodiments, the apparatus may be applied to the access point device in the embodiments of the present application, and the apparatus may implement a corresponding process implemented by the access point device in each method in the embodiments of the present application, and for brevity, details are not described here again.

In some embodiments, the apparatus may be applied to a station device in the embodiments of the present application, and the apparatus may implement a corresponding process implemented by the station device in each method in the embodiments of the present application, and for brevity, details are not described here again.

In some embodiments, the apparatuses mentioned in the embodiments of the present application may also be chips. For example, it may be a system-on-chip, a system-on-chip or a system-on-chip, etc.

Fig. 23 is a schematic block diagram of a communication system 1000 according to an embodiment of the present application. As shown in fig. 23, the communication system 1000 includes a station device 1010 and an access point device 1020.

The station device 1010 may be configured to implement corresponding functions implemented by the station device in the foregoing method, and the access point device 1020 may be configured to implement corresponding functions implemented by the access point device in the foregoing method, which is not described herein again for brevity.

It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or by instructions in the form of software. The Processor may be a general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off the shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and combines hardware thereof to complete the steps of the method.

It will be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), dynamic Random Access Memory (DRAM), synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), enhanced Synchronous SDRAM (ESDRAM), synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It should be understood that the above memories are exemplary but not limiting illustrations, for example, the memories in the embodiments of the present application may also be Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (enhanced SDRAM, ESDRAM), synchronous Link DRAM (SLDRAM), direct Rambus RAM (DR RAM), and the like. That is, the memory in the embodiments of the present application is intended to comprise, without being limited to, these and any other suitable types of memory.

The embodiment of the application also provides a computer readable storage medium for storing the computer program.

In some embodiments, the computer-readable storage medium may be applied to the access point device in the embodiments of the present application, and the computer program enables a computer to execute corresponding processes implemented by the access point device in the methods in the embodiments of the present application, which are not described herein again for brevity.

In some embodiments, the computer-readable storage medium may be applied to the station device in the embodiments of the present application, and the computer program enables a computer to execute corresponding processes implemented by the station device in the methods in the embodiments of the present application, which are not described herein again for brevity.

Embodiments of the present application also provide a computer program product comprising computer program instructions.

In some embodiments, the computer program product may be applied to the access point device in the embodiments of the present application, and the computer program instructions enable the computer to execute corresponding processes implemented by the access point device in the methods in the embodiments of the present application, which are not described herein again for brevity.

In some embodiments, the computer program product may be applied to the station device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the station device in the methods in the embodiments of the present application, which are not described herein again for brevity.

The embodiment of the application also provides a computer program.

In some embodiments, the computer program may be applied to the access point device in the embodiments of the present application, and when the computer program runs on a computer, the computer is enabled to execute corresponding processes implemented by the access point device in the methods in the embodiments of the present application, which is not described herein again for brevity.

In some embodiments, the computer program may be applied to the station device in the embodiments of the present application, and when the computer program runs on a computer, the computer is enabled to execute corresponding processes implemented by the station device in the methods in the embodiments of the present application, which is not described herein again for brevity.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one type of logical functional division, and other divisions may be realized in practice, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions may be stored in a computer-readable storage medium if they are implemented in the form of software functional units and sold or used as separate products. With regard to such understanding, the technical solutions of the present application may be essentially implemented or contributed to by the prior art, or may be implemented in a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of wireless communication, comprising:

before a station STA is switched from a source Access Point (AP) to a target AP, the STA acquires enhanced broadcast service (eBCS) service information of the target AP from the source AP.

2. The method of claim 1, wherein the STA obtaining eBCS service information of the target AP comprises:

the STA sends first information to the source AP, wherein the first information is used for requesting eBCS service information of the target AP, and the first information at least comprises a content identification of eBCS of the target AP;

and the STA receives second information sent by the source AP, wherein the second information at least comprises eBCS service information of the target AP.

3. The method of claim 2, wherein the first information is sent via a fast basic service set handover (FT) request frame.

4. The method of claim 3, wherein the FT request frame includes a first eBCS switching element (ETE) for depositing eBCS service switching information, and the first ETE includes a content identification of an eBCS of the target AP.

5. The method of claim 4,

the first ETE further comprises a first eBCS response control field comprising a first switching time information indication bit and a first switching authentication information indication bit; wherein the content of the first and second substances,

6. The method of any of claims 2 to 5, wherein the second information is sent over an FT response frame.

7. The method of claim 6, wherein the FT response frame comprises a second ETE for depositing eBCS service handover information, and the second ETE comprises eBCS service information for the target AP.

8. The method of claim 7,

the second ETE further comprises a switching time information field for indicating switching time information of the eBCS of the target AP, and a switching authentication information field for indicating switching authentication information of the eBCS of the target AP;

the eBCS service information of the target AP comprises switching time information and switching authentication information of the eBCS of the target AP.

9. The method of claim 8,

the second ETE further comprises a second eBCS response control field comprising a second handover time information indication bit and a second handover authentication information indication bit; wherein the content of the first and second substances,

10. The method of claim 8 or 9, wherein the handover time information field comprises at least one of:

11. The method of claim 8 or 9,

the handover authentication information field comprises a first authentication algorithm bit; wherein the value of the first authentication algorithm bit is used for indicating an authentication algorithm used by the eBCS service of the target AP.

12. The method of claim 11,

under the condition that the bit of the first authentication algorithm takes a first value, the authentication mode used by the eBCS service of the target AP is high-level resource authentication HLSA;

under the condition that the first authentication algorithm bit takes a second value, the authentication mode used by the eBCS service of the target AP is Public Key Frame Authentication (PKFA), and the switching authentication information field further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowed time difference;

under the condition that the first authentication algorithm bit takes a third value, the authentication mode used by the eBCS service of the target AP is a Hash Chain Frame Authentication (HCFA) of non-immediate authentication, and the switching authentication information field further comprises at least one of a bit for indicating an allowed time difference, a bit for indicating an eBCS information frame interval, a bit for indicating an HCFA key change interval and a bit for indicating an HCFA basic key;

under the condition that the bit of the first authentication algorithm takes a fourth value, the authentication mode used by the eBCS service of the target AP is HCFA of instant authentication, and the switching authentication information field further comprises at least one of a bit for indicating the allowable time difference, a bit for indicating the number of instant authenticators, a bit for indicating the hash distance of instant authentication and a bit for indicating instant authenticators.

13. The method of any of claims 2 to 12, further comprising:

after the STA is associated to the target AP, the STA receives eBCS data of the target AP according to eBCS service information of the target AP.

14. The method of claim 1, wherein the STA acquiring the eBCS service information of the target AP comprises:

the STA sends third information to the source AP, wherein the third information is used for requesting eBCS service information of the target AP, and the third information comprises Basic Service Set Identification (BSSID) of the target AP;

and the STA receives fourth information sent by the source AP, wherein the fourth information at least comprises eBCS service information of the target AP.

15. The method of claim 14, wherein the third information is sent via a general broadcast service (GAS) request frame, wherein the GAS request frame includes an enhanced broadcast request Access Network Query Protocol (ANQP) element that includes a BSSID of the target AP.

16. The method of claim 15, wherein the enhanced broadcast request ANQP element comprises a first field and a second field; wherein the first field is used for indicating that the enhanced broadcast request ANQP element requests the termination time of the eBCS service requested by the STA from the source AP, and the second field is used for indicating the BSSID of the target AP.

17. The method of claim 16,

the enhanced broadcast request ANQP element further comprises a first eBCS request control field comprising a first bit, a second bit, and a third bit; wherein, the first and the second end of the pipe are connected with each other,

a value of the first bit indicates that the enhanced broadcast request (ANQP) element includes the first field;

the value of the second bit indicates that the enhanced broadcast request ANQP element is used for requesting the authentication information of the source AP;

18. The method of claim 15, wherein the enhanced broadcast request (ANQP) element comprises a broadcast action field and a field to indicate a BSSID of the target AP; wherein the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of the target AP.

19. The method of any of claims 14 to 18, wherein the fourth information is sent over a GAS response frame, wherein the GAS response frame includes an enhanced broadcast response ANQP element that includes eBCS service information for the target AP.

20. The method of claim 19,

the enhanced broadcast response (ANQP) element includes a target AP information field, wherein the target AP information field is used for indicating eBCS service information of the target AP.

21. The method of claim 20, wherein the enhanced broadcast response ANQP element further comprises an authentication information field to indicate authentication information used by the eBCS of the source AP.

22. The method of claim 21,

the enhanced broadcast response ANQP element further includes a third eBCS response control field including fourth and fifth bits; wherein the content of the first and second substances,

a value of the fourth bit indicates that the enhanced broadcast response ANQP element includes an authentication information field of the source AP;

23. The method of any one of claims 20 to 22,

the target AP information field includes at least one of:

a field for indicating the duration of the service period of the eBCS of the target AP, a field for indicating the interval of the service period of the eBCS of the target AP, a field for indicating the next eBCS service start time, and an authentication information field of the target AP for indicating the authentication information used by the eBCS of the target AP.

24. The method of claim 23,

the authentication information field of the target AP comprises a second authentication algorithm bit; and the value of the second authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the target AP.

25. The method of claim 24,

under the condition that the bit of the second authentication algorithm takes a fifth value, the authentication mode used by the eBCS service of the target AP is HLSA;

26. The method of any one of claims 14 to 25, further comprising:

and after the STA is switched from the source AP to the target AP, the STA receives eBCS data of the target AP according to eBCS service information of the target AP.

27. A method of wireless communication, comprising:

before a station STA is switched from a source Access Point (AP) to a target AP, the source AP sends enhanced broadcast service (eBCS) service information of the target AP to the STA.

28. The method of claim 27, wherein the source AP sending the eBCS service information of the target AP to the STA, comprising:

the source AP receives first information sent by the STA, the first information is used for requesting eBCS service information of the target AP, and the first information at least comprises a content identification of eBCS of the target AP;

and the source AP sends second information to the STA, wherein the second information at least comprises eBCS service information of the target AP.

29. The method of claim 28, wherein the first information is sent via a fast basic service set switching (FT) request frame.

30. The method of claim 29, wherein the FT request frame comprises a first eBCS handover element, ETE, for depositing eBCS service handover information, and the first ETE comprises a content identification of an eBCS of the target AP.

31. The method of claim 30,

32. The method of any of claims 28 to 31, wherein the second information is sent over an FT response frame.

33. The method of claim 32, wherein the FT response frame comprises a second ETE, the second ETE for storing eBCS service handover information, and the second ETE comprising eBCS service information of the target AP.

34. The method of claim 33,

35. The method of claim 34,

the second ETE further comprises a second eBCS response control field comprising a second switching time information indication bit and a second switching authentication information indication bit; wherein the content of the first and second substances,

36. The method of claim 34 or 35, wherein the handover time information field comprises at least one of:

37. The method of claim 34 or 35,

38. The method of claim 37,

under the condition that the first authentication algorithm bit takes a third value, the authentication mode used by the eBCS service of the target AP is a Hash Chain Frame Authentication (HCFA) of non-immediate authentication, and the switching authentication information field further comprises at least one of a bit for indicating the allowed time difference, a bit for indicating the eBCS information frame interval, a bit for indicating the HCFA key change interval and a bit for indicating the HCFA basic key;

and under the condition that the bit of the first authentication algorithm takes a fourth value, the authentication mode used by the eBCS service of the target AP is the HCFA of instant authentication, and the switching authentication information field further comprises at least one of a bit for indicating the allowed time difference, a bit for indicating the number of instant authenticators, a bit for indicating the hash distance of the instant authentication and a bit for indicating the instant authenticators.

39. The method according to any of claims 28 to 38, wherein the eBCS service information of the target AP is obtained by the source AP from the target AP.

40. The method of claim 27, wherein the source AP sending the eBCS service information of the target AP to the STA, comprising:

the source AP receives third information sent by the STA, the third information is used for requesting eBCS service information of the target AP, and the third information comprises Basic Service Set Identification (BSSID) of the target AP;

and the source AP sends fourth information to the STA, wherein the fourth information at least comprises eBCS service information of the target AP.

41. The method of claim 40, wherein the third information is sent via a general broadcast service (GAS) request frame, wherein the GAS request frame includes an enhanced broadcast request Access Network Query Protocol (ANQP) element that includes a BSSID of the target AP.

42. The method of claim 41, wherein the enhanced broadcast request (ANQP) element comprises a first field and a second field; wherein the first field is used for indicating that the enhanced broadcast request ANQP element requests the termination time of the eBCS service requested by the STA from the source AP, and the second field is used for indicating the BSSID of the target AP.

43. The method of claim 42,

the enhanced broadcast request ANQP element further comprises a first eBCS request control field comprising a first bit, a second bit, and a third bit; wherein the content of the first and second substances,

a value of the second bit indicates that the enhanced broadcast request ANQP element is used to request authentication information of the source AP;

44. The method of claim 41, wherein the enhanced broadcast request (ANQP) element includes a broadcast action field and a field to indicate a BSSID of the target AP; wherein the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of the target AP.

45. The method of any one of claims 40 to 44, wherein the fourth information is sent over a GAS response frame, wherein the GAS response frame comprises an enhanced broadcast response (ANQP) element that includes eBCS service information for the target AP.

46. The method of claim 45,

the enhanced broadcast response ANQP element includes a target AP information field, wherein the target AP information field is used to indicate eBCS service information of the target AP.

47. The method of claim 46, wherein the enhanced broadcast response (ANQP) element further comprises an authentication information field to indicate authentication information used by the eBCS of the source AP.

48. The method of claim 47,

the enhanced broadcast response ANQP element further comprises a third eBCS response control field comprising a fourth bit and a fifth bit; wherein, the first and the second end of the pipe are connected with each other,

a value of the fourth bit indicates that the enhanced broadcast response (ANQP) element includes an authentication information field of the source AP;

49. The method of any one of claims 46 to 48,

the target AP information field includes at least one of:

50. The method of claim 49,

51. The method of claim 50,

52. The method according to any of the claims 40 to 51, wherein the eBCS service information of the target AP is obtained by the source AP from an advertisement server.

53. A method of wireless communication, comprising:

a station STA acquires enhanced broadcast service eBCS service information of at least one candidate AP from a source access point AP;

the STA determines a target AP from the at least one candidate AP;

and after the STA is switched from the source AP to the target AP, the STA receives eBCS data of the target AP according to the eBCS service information of the target AP.

54. The method of claim 53, wherein the STA obtains eBCS service information of at least one candidate AP from a source AP, comprising:

the STA sending first information to the source AP, wherein the first information is used for requesting eBCS service information of the at least one candidate AP and comprises a Basic Service Set Identification (BSSID) of the at least one candidate AP;

and the STA receives second information sent by the source AP, wherein the second information at least comprises eBCS service information of the at least one candidate AP.

55. The method of claim 54, wherein the first information is sent via a general broadcast service (GAS) request frame, wherein the GAS request frame comprises an enhanced broadcast request Access Network Query Protocol (ANQP) element comprising a BSSID of the at least one candidate AP.

56. The method of claim 55, wherein the enhanced broadcast request (ANQP) element comprises a first field and a second field; wherein the first field is for indicating that the enhanced broadcast request ANQP element requests a termination time of eBCS service requested by the STA from the source AP, and the second field is for indicating a BSSID of the at least one candidate AP.

57. The method of claim 56,

the enhanced broadcast request ANQP element further includes an eBCS request control field including a first bit, a second bit, and a third bit; wherein the content of the first and second substances,

58. The method of claim 57, wherein the enhanced broadcast request (ANQP) element comprises a broadcast action field and a field for indicating a BSSID of the at least one candidate AP; wherein the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of a candidate AP.

59. The method of any one of claims 54 to 58, wherein the second information is sent via a GAS response frame, wherein the GAS response frame comprises an enhanced broadcast response (ANQP) element that includes eBCS service information for the at least one candidate AP.

60. The method of claim 59,

the enhanced broadcast response ANQP element includes a candidate AP information field, wherein the candidate AP information field is used to indicate eBCS service information for the at least one candidate AP.

61. The method of claim 60 wherein the enhanced broadcast response (ANQP) element further comprises an authentication information field to indicate authentication information used by the eBCS of the source AP.

62. The method of claim 61,

the enhanced broadcast response (ANQP) element further comprises an eBCS response control field, the eBCS response control field comprising a fourth bit and a fifth bit; wherein, the first and the second end of the pipe are connected with each other,

63. The method of any of claims 60 to 62,

the candidate AP information field includes at least one of:

64. The method of claim 63,

the authentication information field of the candidate AP comprises authentication algorithm bits; and the value of the authentication algorithm bit is used for indicating the authentication algorithm used by the eBCS service of the corresponding candidate AP.

65. The method of claim 64,

under the condition that the bit of the authentication algorithm takes a first value, the authentication mode used by the eBCS service of the corresponding candidate AP is HLSA;

66. A method of wireless communication, comprising:

the source access point AP sends enhanced broadcast service (eBCS) service information of at least one candidate AP to the station STA.

67. The method of claim 66, wherein the source AP sends eBCS service information for at least one candidate AP to a STA, comprising:

the source AP receives first information sent by the STA, wherein the first information is used for requesting eBCS service information of the at least one candidate AP and comprises a Basic Service Set Identification (BSSID) of the at least one candidate AP;

and the source AP sends second information to the STA, wherein the second information at least comprises eBCS service information of the at least one candidate AP.

68. The method of claim 67, wherein the first information is sent via a general broadcast service (GAS) request frame, wherein the GAS request frame comprises an enhanced broadcast request Access Network Query Protocol (ANQP) element comprising a BSSID of the at least one candidate AP.

69. The method of claim 68, wherein the enhanced broadcast request (ANQP) element comprises a first field and a second field; wherein the first field is for indicating that the enhanced broadcast request ANQP element requests a termination time of eBCS service requested by the STA from the source AP, and the second field is for indicating a BSSID of the at least one candidate AP.

70. The method of claim 69,

71. The method of claim 70, wherein the enhanced broadcast request (ANQP) element comprises a broadcast action field and a field for indicating a BSSID of the at least one candidate AP; wherein the value of the broadcast action field is used to indicate that the enhanced broadcast request ANQP element requests eBCS service information of a candidate AP.

72. The method of any one of claims 67 to 71, wherein the second information is sent via a GAS response frame, wherein the GAS response frame comprises an enhanced broadcast response (ANQP) element that includes eBCS service information for the at least one candidate AP.

73. The method of claim 72,

74. The method of claim 73, wherein the enhanced broadcast response (ANQP) element further comprises an authentication information field to indicate authentication information used by the eBCS of the source AP.

75. The method of claim 74,

the enhanced broadcast response ANQP element further comprises an eBCS response control field comprising a fourth bit and a fifth bit; wherein the content of the first and second substances,

76. The method of any one of claims 73 to 75,

the candidate AP information field includes at least one of:

77. The method of claim 76,

78. The method of claim 77,

and under the condition that the bit of the authentication algorithm takes a second value, the authentication mode used by the eBCS service of the corresponding candidate AP is PKFA, and the authentication information field of the candidate AP further comprises at least one of a bit for indicating a certificate, a bit for indicating the length of the certificate and a bit for indicating the allowable time difference.

79. The method of any one of claims 66 to 78, wherein the eBCS service information for the at least one candidate AP is obtained by the source AP from an advertisement server.

80. A station device, wherein the station device is an STA, and the station device comprises:

the communication unit is used for acquiring enhanced broadcast service eBCS service information of a target AP from a source AP before a station STA is switched from the source AP to the target AP.

81. An access point device, wherein the access point device is a source AP, the access point device comprising:

the communication unit is used for sending enhanced broadcast service eBCS service information of a target AP to a station STA before the station STA is switched from a source AP to the target AP.

82. A station device, wherein the station device is an STA, and the station device includes:

the communication unit is used for acquiring enhanced broadcast service eBCS service information of at least one candidate AP from a source access point AP;

a processing unit configured to determine a target AP from the at least one candidate AP;

after the STA is switched from the source AP to the target AP, the communication unit is further used for receiving eBCS data of the target AP according to the eBCS service information of the target AP.

83. An access point device, wherein the access point device is a source access point, AP, and wherein the access point device comprises:

a communication unit, configured to send enhanced broadcast service, eBCS, service information of at least one candidate AP to a station STA.

84. A station apparatus, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory, to perform the method of any of claims 1 to 26, or to perform the method of any of claims 53 to 65.

85. An access point device, comprising: a processor and a memory for storing a computer program, the processor being configured to invoke and execute the computer program stored in the memory, to perform the method of any of claims 27 to 52, or to perform the method of any of claims 66 to 79.

86. A chip, comprising: a processor for calling and running a computer program from a memory so that a device on which the chip is installed performs the method of any one of claims 1 to 26, or performs the method of any one of claims 27 to 52, or performs the method of any one of claims 53 to 65, or performs the method of any one of claims 66 to 79.

87. A computer-readable storage medium storing a computer program for causing a computer to perform the method of any one of claims 1 to 26, or the method of any one of claims 27 to 52, or the method of any one of claims 53 to 65, or the method of any one of claims 66 to 79.

88. A computer program product comprising computer program instructions to cause a computer to perform the method of any one of claims 1 to 26, or to perform the method of any one of claims 27 to 52, or to perform the method of any one of claims 53 to 65, or to perform the method of any one of claims 66 to 79.

89. A computer program, characterized in that the computer program causes a computer to perform the method of any one of claims 1 to 26, or to perform the method of any one of claims 27 to 52, or to perform the method of any one of claims 53 to 65, or to perform the method of any one of claims 66 to 79.