CN112911685A

CN112911685A - Method, terminal and storage medium for wireless local area network scanning and synchronization

Info

Publication number: CN112911685A
Application number: CN202110125882.4A
Authority: CN
Inventors: 吴昊; 王鑫
Original assignee: Chengdu Jimi Technology Co Ltd
Current assignee: Chengdu Jimi Technology Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-06-04
Anticipated expiration: 2041-01-29
Also published as: CN112911685B

Abstract

The application discloses a method, a terminal and a storage medium for scanning and synchronizing a wireless local area network. The scanning method comprises the following steps: the high-level management unit sends a primitive to the low-level management unit and requests the low-level management unit to perform scanning operation; and after receiving the primitive, the low-layer management unit executes scanning operation, and after the scanning is finished, the detected logic AP information is sent to the high-layer management unit through the primitive, wherein the primitive comprises one or more information elements, and when the local parameter indicates that the terminal supports the EHT system capability or indicates that the terminal supports the EHT system capability and enables the local parameter, and the terminal reads corresponding information in the scanned beacon message or probe response message of the logic AP, the information elements comprise corresponding parameters. The method and the device enable the terminal to obtain the relevant information of the multilink through the configuration of the scanning request, and the relevant information is used for the terminal to subsequently select and join the multilink access equipment to obtain the data transmission service with higher speed and lower delay.

Description

Method, terminal and storage medium for wireless local area network scanning and synchronization

Technical Field

The present application relates to the field of wireless communications, and in particular, to a method, a terminal, and a storage medium for scanning and synchronizing a wireless local area network.

Background

In the 802.11 system, an access device (AP STA) and a terminal (Non-AP STA) are both internally deployed with a MAC layer and a PHY layer, wherein the main functions of the MAC layer include channel management, connection management, quality of service management, power control, time synchronization, and the like, and the main functions of the PHY layer include modulation, coding, transmission, and the like.

Both the MAC layer and the PHY layer conceptually include management units referred to as a MAC layer management unit mlme (MAC sublayer management entity) and a physical layer management unit plme (PHY sublayer management entity), respectively. These elements provide low-level management service interfaces through which low-level management functions can be invoked.

In order to provide correct MAC operation, each STA (including Non-AP STA and AP STA) has a higher layer management unit, such as SME (device management element), which represents a higher layer management unit above the MAC layer, and is a layer-independent unit, which is located in a separate management plane.

The function of SME: typically, this unit is responsible for functions such as collecting layer-related state from various layer management units (MLME and PLME), which similarly also set layer-specific parameter values. SMEs typically perform such functions on behalf of a general system management entity.

802.11be networks, also known as Extreme High Throughput (EHT) networks, are enhanced by a range of system features and a variety of mechanisms to achieve very High Throughput. As the use of Wireless Local Area Networks (WLANs) continues to grow, it becomes increasingly important to provide wireless data services in many environments, such as homes, businesses, and hot spots. In particular, video traffic will continue to be the dominant type of traffic in many WLAN deployments. With the advent of 4k and 8k video (uncompressed rates of 20 Gbps), the throughput requirements for these applications are constantly evolving. New high throughput, low latency applications such as virtual reality or augmented reality, gaming, remote offices, and cloud computing will proliferate (e.g., latency for real-time gaming is less than 5 milliseconds).

In view of the high throughput and stringent real-time latency requirements of these applications, users expect higher throughput, higher reliability, less latency and jitter, and higher power efficiency when supporting their applications over a WLAN. Users desire improved integration with Time Sensitive Networks (TSNs) to support applications on heterogeneous ethernet and wireless LANs. 802.11be networks aim to ensure the competitiveness of WLANs by further increasing overall throughput and reducing latency, while ensuring backward compatibility and coexistence with legacy technology standards. 802.11 compatible devices operating in the 2.4GHz, 5GHz and 6GHz bands.

Disclosure of Invention

The SME of the terminal can require the MLME to scan the logical APs which are possibly accessed subsequently in advance, so that the terminal can make a decision in advance, and can access other logical APs to transmit data more quickly when the location changes, the network quality decreases, the network needs to perform load balancing and other scenes occur. In a multilink scenario, one physical multilink access device does not only operate one logical AP, and multiple logical APs can simultaneously provide a data transmission service with higher rate and lower delay for a terminal which also supports multilink, however, an existing scanning mechanism cannot support identification and reporting of the multilink access device, so that the terminal cannot obtain a better service. In view of this, embodiments of the present application provide a method, a terminal, and a storage medium for scanning and synchronizing a wireless local area network, so that the terminal can obtain relevant information of multiple links by configuring a scanning request, and the information is used for the terminal to subsequently select and join multiple link access devices to obtain a data transmission service with a higher rate and a lower delay.

A BSS (basic service set) is implemented by deploying one or more APs (access points), and the BSSID of the BSS is usually set to the MAC address of the AP.

In a first aspect, an embodiment of the present application provides a method for wireless local area network scanning, including:

the high-level management unit sends MLME-SCAN request primitives to the low-level management unit, and requests the low-level management unit to perform scanning operation;

after receiving the MLME-SCAN.request primitive, the lower management unit executes scanning operation;

after the low-layer management unit finishes scanning, sending detected logic AP information to a high-layer management unit through an MLME-SCAN.confirm primitive, wherein the MLME-SCAN.confirm primitive comprises a parameter BSSDescriptionSet, the BSSDescriptionSet comprises one or more BSSDescription information elements, and when a local parameter dot11EHTOPTIONImplemented indicates that a terminal supports EHT system capability or indicates that the terminal supports EHT system capability and is enabled, and the terminal reads EHT capabilities information in scanned beacon messages or protocol response messages of the logic AP, the terminal contains an EHT capabilities parameter in the Description, and the EHT capabilities parameter is used for indicating EHT system capability parameters of access equipment; when the local parameter dot11 ehton executed indicates that the terminal supports the EHT system capability or indicates that the terminal supports and enables the EHT system capability, and the terminal reads EHT operation information in the beacon message or the probe response message of the scanned logical AP, the BSSDescription includes an EHT operation parameter, and the EHT operation parameter is used for indicating an EHT system operation parameter of the access device.

In a possible implementation manner, when the local parameter dot11multilink operation implemented indicates that the terminal supports the multilink operation capability or indicates that the terminal supports the multilink operation capability and starts the operation, or when the local parameter dot11 ehtonationimplemented indicates that the terminal supports the EHT system capability or indicates that the terminal supports the EHT system capability and enables the EHT system capability, and the dot11multilink operation implemented indicates that the terminal supports the multilink operation capability or indicates that the terminal supports the multilink operation capability and starts the operation, and the terminal reads ML Elements information in a beacon message or a probe response message of the scanned logical AP, where the BSSDescription further includes a parameter ML Elements used for indicating the multilink parameters of the access device. Optionally, the parameter ML Elements may also be included in the EHT capabilities parameter or the EHT operation parameter. Still further, the parameter ML Elements may be included in the MAC capabilities of the EHT capabilities parameter, and the Multi link support is included in the ML Elements. When the parameters ML Elements are included in the EHT operation parameter, the parameters Align start time of PPDU and Align end time of PPDU in the EHT operation parameter may be included in the ML Elements.

In a second aspect, an embodiment of the present application provides a method for synchronizing a wireless local area network, including:

scanning according to the method for scanning the wireless local area network in the first aspect;

the method comprises the steps that a high-level management unit sends an MLME-JOIN.request primitive to a low-level management unit, wherein the MLME-JOIN.request primitive comprises a parameter SelectedBSS, and the SelectedBSS is used for indicating appointed logic AP information; when the local parameter dot11 EHTOptoPrimeTime indicates that the terminal supports the EHT system capability or indicates that the terminal supports and enables the EHT system capability, the MLME-JOIN.request primitive further comprises a parameter STA-EHT Capabilities, and the STA-EHT Capabilities are used for indicating the EHT system capability parameter of the terminal;

after receiving the MLME-JOIN.request primitive, the lower management unit executes synchronous operation;

and the lower-layer management unit sends an MLME-JOIN.confirm primitive to the higher-layer management unit, wherein the MLME-JOIN.confirm primitive comprises a parameter Resultcode, and the Resultcode is used for indicating a synchronization result.

In a third aspect, an embodiment of the present application provides a terminal, where the terminal includes a higher management unit and a lower management unit, where,

the high-level management unit is used for sending MLME-SCAN request primitives to the low-level management unit and requesting the low-level management unit to perform scanning operation;

a lower management unit, configured to execute a scan operation after receiving the MLME-scan. After scanning is completed, sending detected logic AP information to a high-level management unit through an MLME-SCAN.confirm primitive, wherein the MLME-SCAN.confirm primitive comprises a parameter BSSDescriptionSet, the BSSDescriptionSet comprises one or more BSSDescription information elements, when a local parameter dot11EHT _ ToptionImplemented indicates that a terminal supports EHT system capability or indicates that the terminal supports EHT system capability and is enabled, and the terminal reads EHT capabilities information in scanned beacon messages or protocol response messages of the logic AP, the BSS contains an EHT capabilities parameter which is used for indicating EHT system capability parameters of an access device; when the local parameter dot11 ehton executed indicates that the terminal supports the EHT system capability or indicates that the terminal supports and enables the EHT system capability, and the terminal reads EHT operation information in the beacon message or the probe response message of the scanned logical AP, the BSSDescription includes an EHT operation parameter, and the EHT operation parameter is used for indicating an EHT system operation parameter of the access device.

In a fourth aspect, an embodiment of the present application provides a terminal, where the terminal includes a higher management unit and a lower management unit, and the terminal performs scanning according to the method for scanning a wireless local area network in the first aspect; wherein the content of the first and second substances,

the system comprises a high-level management unit, a low-level management unit and a logical AP management unit, wherein the high-level management unit is used for sending an MLME-JOIN.request primitive to the low-level management unit, the MLME-JOIN.request primitive comprises a parameter SelectedBSS, and the SelectedBSS is used for indicating appointed logical AP information; when the local parameter dot11 EHTOptoPrimeTime indicates that the terminal supports the EHT system capability or indicates that the terminal supports and enables the EHT system capability, the MLME-JOIN.request primitive further comprises a parameter STA-EHT Capabilities, and the STA-EHT Capabilities are used for indicating the EHT system capability parameter of the terminal;

a lower management unit, configured to execute a synchronization operation after receiving the MLME-join request primitive; and sending an MLME-JOIN.confirm primitive to a high-level management unit, wherein the MLME-JOIN.confirm primitive comprises a parameter ResultCode, and the ResultCode is used for indicating a synchronization result.

In a fifth aspect, an embodiment of the present application provides a terminal, where the terminal includes a processor and a memory, where the memory stores at least one program code, and the at least one program code is loaded and executed by the processor to implement the method for scanning a wireless local area network according to the first aspect or the method for synchronizing a wireless local area network according to the second aspect.

In a sixth aspect, an embodiment of the present application provides a storage medium, where at least one program code is stored, and the at least one program code is loaded and executed by a processor to implement the method for wireless local area network scanning according to the first aspect or the method for wireless local area network synchronization according to the second aspect.

It should be noted that the terminal described in the third aspect is configured to execute the method provided in the first aspect, the terminal described in the fourth aspect is configured to execute the method provided in the second aspect, and the terminal described in the fifth aspect and the storage medium described in the sixth aspect are configured to execute the method provided in the first aspect or the second aspect, so that the same beneficial effects as those of the method described in the first aspect or the second aspect can be achieved, and details of the embodiments of the present application are not repeated.

Has the advantages that: when a multilink terminal runs with a plurality of logic STAs, each STA is required to execute scanning and synchronizing processes according to the prior art, and through the implementation of the method and the device, the information of a plurality of links can be acquired through a single STA, so that the signaling delay of the multilink terminal for establishing the multilink connection is reduced, the signaling overhead of the multilink terminal for establishing the connection is reduced, and the throughput of network effective data is improved.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Moreover, while the disclosure herein has been presented in terms of exemplary one or more examples, it is to be understood that each aspect of the disclosure can be utilized independently and separately from other aspects of the disclosure to provide a complete disclosure. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the embodiments of the present application, the words "exemplary," "for example," and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in this application do not denote any order, quantity, or importance, but rather the terms are used merely to distinguish one element from another, and the meanings of the corresponding terms may be the same or different. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items.

In this embodiment, both the terminal device and the access device include a low-level management unit and a high-level management unit, where the low-level management unit is a unit that manages and controls data transmission of the device, such as an MLME and a PLME, and the high-level management unit is a unit that manages a service or an application of the device, such as an equipment management unit SME and an application management unit ame (application management entity).

It should be noted that the multilink device includes a plurality of logic entities, each logic entity performs data transmission through one link, and each logic entity includes an independent data transceiver module. A conventional single-link device has only one logical entity and only one MAC address, while a multi-link device has one MAC address, and each logical entity belonging to the multi-link device has one MAC address, for example, if a multi-link device runs 3 logical entities, there are four MAC addresses on the physical device, one is of the multi-link device, and each of the three logical entities has one MAC address. In the embodiment of the present application, the logical AP is a logical entity in the access device, and the logical STA is a logical entity in the terminal.

In the embodiment of the application, the method for scanning and synchronizing the wireless local area network comprises the following processes:

1. if the current device supports the EHT system capability and is enabled, the value of the current device is set to true when the parameter dot11 EHTOPTIONPLENED is set locally, and if the device supports the EHT system capability and is not enabled, the value of the current device is set to false when the parameter dot11 EHTOPTIONPLENED is set locally.

Or if the current device supports the EHT capability, the parameter dot11EHTOPTIONIMPLEMENTED is set locally, and the value is set to true.

2. If the current equipment supports the capability of an EHT system, has the multilink operation capability and starts the operation, namely when the dot11EHtoptionimplemented is true, the parameter dot11multilink operation implemented is locally set, and the value of the multilink operation implemented is set to true; if the multilink operation capability is provided and the operation is closed, a parameter dot11multilink operation executed is set locally, and the value is set to false;

or the like, or, alternatively,

if the current equipment supports the multilink operation capability, a parameter dot11multilink operation executed is set locally, and the value is set to true.

The SME sends MLME-SCAN.request primitive to the MLME, requests the MLME to carry out scanning operation, the primitive includes the following parameters:

BSS type: the type of basic service set may be set to ibss (independent bss), mbss (mesh bss), pbss (personal bss), or vbss (virtual bss), for example;

BSSID: a designated BSSID or a wildcard of BSSIDs;

SSID: the SSID desired to be scanned or the wildcard of the SSID;

ScanType: active scanning or passive scanning;

probe delay: a delay time for transmitting a probe request frame in the active scan;

channelllist: scanning channels needing to be measured;

MinChannelTime: the minimum time required to scan a channel;

MaxChannelTime: the maximum time required to scan a channel;

RequestInformation: the information acquired is needed.

And 4, after receiving the MLME-SCAN request primitive, starting to execute scanning by the MLME.

After the MLME scanning is completed, sending the detected logic AP information to the SME through a primitive MLME-SCAN.confirm, wherein the primitive comprises the following parameters:

BSSDescriptionSet: scanning results, including one or more BSSDescription information elements;

the BSSDescription information element includes parameter representations such as table 1 or table 2.

TABLE 1

TABLE 2

When the dot11 ehtopitionfmplemented value is true and the terminal reads EHT Capabilities information in the beacon message or probe response message of the scanned logical AP, the BSSDescription includes EHT Capabilities parameters, and the EHT Capabilities parameter setting representation is shown in table 3, for example.

TABLE 3

MAC Capability

PHY Capability

MAC Capability: MAC layer capabilities of the EHT system;

PHY Capability: physical layer capabilities of the EHT system;

illustratively, the MAC Capability contains one or more of the parameters shown in table 4.

TABLE 4

The PHY Capability contains one or more of the parameters shown in table 5.

TABLE 5

When the value of dot11 ehtoptionimpacted is true and the terminal reads EHT operation information in the beacon message or the probe response message of the scanned logical AP, the BSSDescription includes EHT operation parameters, and the EHT operation parameters include one or more of the parameters shown in table 6.

TABLE 6

When the value of dot11multilink optionnected is true, or when the value of dot11 ehtonationimplementedis true and the value of dot11multilink optionnected is true, and the terminal reads ML Elements information including ML Elements parameters in the scanned beacon message or probe response message of the logical AP, the ML Elements parameters are set as shown in table 7, for example.

TABLE 7

MLD common info

STA info 1

STA info n

MLD common info: indicating a multilink common parameter of the access device;

STA info 1-STA info n: indicating a proprietary parameter of a single logical AP in the access device, 1-n representing that there may be one or more logical APs, parameter n being determined by the number of logical APs actually operated by the access device;

the STA info 1-n parameters may be set as shown in Table 8.

TABLE 8

Link ID

STA Capability

STA operation

Link ID: an identification indicating a link on which the logical AP operates;

STA Capability: indicating a capability parameter specific to the logical AP;

STA operation: indicating the operating parameters specific to the logical AP.

And 6, after receiving the MLME-SCAN.confirm primitive, the SME stores BSSDescription information in the BSSDescriptionSet parameter in a local place.

When the current signal quality is reduced, or the current signal is lost, or the current network load is too heavy, the SME reads the logical AP information matched with the network capability in the BSSDescription stored locally according to the locally stored capability parameter, takes the logical APs capable of meeting the capabilities of all the terminals as candidate logical APs, measures the candidate logical APs, sorts the measurement signals, selects the logical AP with the best signal quality to compare with a preset connection threshold value T1, if the value is higher than the threshold value, sends an MLME-join request primitive to the MLME, if the logical AP with the best signal quality is lower than the connection threshold value T1, takes other logical APs as candidate logical APs, measures the logical APs, sorts the measurement signals, selects the logical AP with the best signal quality to compare with a preset connection threshold value T1, if the value is higher than the threshold value, a MLME-join request primitive is sent to the MLME and the current connection is maintained if the logical AP with the best signal quality is below the connection threshold T1.

The SME sends an MLME-JOIN.request primitive to the MLME, and the MLME-JOIN.request primitive comprises the following parameters:

SelectedBSS: designated logical AP information, the logical AP being selected by the SME from BSSDescription in the received MLME-SCAN.confirm primitive;

JoinFailureTimeout: the maximum time allowed by the process that the terminal joins the logical AP takes beacon sending interval of the logical AP as a unit;

NAVSyncDelay: a delay time allowed for transmission from the sleep state to the awake state;

OperationalRateSet: the data rate that the terminal and logical AP communication can support;

EHT Capabilities: when dot11 ehtopitionfmplemented is true, the parameter is included, the parameter is used for indicating an EHT system capability parameter of the terminal, and the parameter item is the same as the EHT capabilities parameter acquired from the access device in step 4.

After receiving the MLME-join request primitive, the MLME may perform an operation in one of the following ways:

1) performing timing synchronization with a logic AP appointed in a received primitive, setting a parameter ResultCode as SUCCESS after the synchronization is completed, setting the parameter ResultCode as JOIN _ FAILURE _ TIMEOUT if the synchronization is not completed in the JoinFailureTimeout time, and sending an MLME-JOIN.confirm primitive to the SME;

2) if the selectedBSS in the primitive comprises a plurality of logical APs and all the contained logical APs belong to the same multilink access equipment, timing synchronization is carried out on the logical APs appointed in the received primitive, after synchronization is completed, a parameter ResultCode is set to SUCCESS, an MLME-JOIN.confirm primitive is sent to the SME, if the selectedBSS in the primitive comprises a plurality of logical APs and the contained logical APs belong to different multilink access equipment, the parameter ResultCode is set to NOT _ SUPPORTED, and the MLME-JOIN.confirm primitive is sent to the SME;

3) if the parameter SelectedBSS in the MLME-JOIN _ request primitive contains the parameter Basic EHT-MCS and NSS set, and if any terminal unsupported < EHT-MCS, NSS > tuple is contained in the parameter, and the tuple is used for explaining the number of modulation and demodulation strategies and spatial streams SUPPORTED by the STA, the ResultCode parameter value is set to NOT _ SUPPORTED or JOIN _ FAILURE _ timer in the MLME-JOIN _ request primitive.

MLME-join. confirm primitive contains parameters:

resultcode: indicating the result of synchronization, illustratively, a value of SUCCESS indicates that synchronization was successful, a value of JOIN _ FAILURE _ TIMEOUT indicates that synchronization failed, and a value of NOT _ SUPPORTED indicates that the terminal cannot fully support the operating parameters of the access device.

In some embodiments, the parameter ML Elements in the BSSDescription is included in the parameter EHT capabilities or the parameter EHT operation, in the following possible ways:

1) included in the EHT capabilities parameters, EHT capabilities parameter settings are shown in table 9, for example.

TABLE 9

MAC Capability

PHY Capability

ML Elements

2) Included in the MAC Capability, which is a sub-parameter of the EHT capabilities parameter, is an example of the parameters included in the MAC Capability as shown in table 10.

Watch 10

3) The EHT operation parameter is included in the EHT operation parameter, and the EHT operation parameter setting is shown in table 11, for example.

TABLE 11

4) Parameters related to multilink capability in the ML elements are included in the EHT capabilities parameter, and parameters related to multilink operation in the ML elements are included in the EHT operation parameter.

5) Parameters related to multilink Capability in the ML elements are included in the MAC Capability parameter, and parameters related to multilink operation in the ML elements are included in the EHT operation parameter.

The embodiment of the present application further provides a terminal, where the terminal includes a high-level management unit and a low-level management unit, where,

a lower management unit, configured to execute a scan operation after receiving the MLME-scan. After scanning is completed, sending detected BSS information to a high-level management unit through an MLME-SCAN.confirm primitive, wherein the MLME-SCAN.confirm primitive comprises a parameter BSSDescriptionSet, the BSSDescriptionSet comprises one or more BSSDescription information elements, when a local parameter dot11EHTOPTIONImplemented indicates that a terminal supports EHT system capability or indicates that the terminal supports EHT system capability and is enabled, and the terminal reads EHT capabilities information in scanned beacon messages or protocol response messages of a logical AP, the BSS contains an EHT capabilities parameter which is used for indicating EHT system capability parameters of an access device; when the local parameter dot11 ehton executed indicates that the terminal supports the EHT system capability or indicates that the terminal supports and enables the EHT system capability, and the terminal reads EHT operation information in the beacon message or the probe response message of the scanned logical AP, the BSSDescription includes an EHT operation parameter, and the EHT operation parameter is used for indicating an EHT system operation parameter of the access device.

The embodiment of the application also provides a terminal, which comprises a high-level management unit and a low-level management unit, and the terminal performs scanning according to the method for scanning the wireless local area network related to the embodiment; wherein the content of the first and second substances,

The embodiment of the present application further provides a terminal, where the terminal includes a processor and a memory, where at least one program code is stored in the memory, and the at least one program code is loaded and executed by the processor, so as to implement the method for scanning and synchronizing a wireless local area network according to the above embodiment.

The embodiment of the present application further provides a storage medium, where at least one program code is stored in the storage medium, and the at least one program code is loaded and executed by a processor, so as to implement the method for scanning and synchronizing a wireless local area network according to the foregoing embodiment.

It should be understood that, in various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, some or all of the steps may be executed in parallel or executed sequentially, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

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 logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

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 place, or may be distributed on a plurality of 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, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, a network device or a terminal device, etc.) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: u disk, removable hard disk, ROM, RAM) magnetic or optical disk, or the like.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.

The word "if" or "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

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 conceive 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 local area network scanning, comprising:

2. The method of claim 1, wherein the EHT capabilities comprise MAC capabilities and PHY capabilities, and wherein the MAC capabilities comprise one or more of the following parameters:

trigger P2P support for indicating whether to support point-to-point data transmission Triggered by the access device;

a Multi link support for indicating whether a multilink operation is supported;

a Multi AP support for indicating whether a Multi-point cooperative operation is supported;

a 1024-bit BA bitmap support for indicating whether to support bitmap block feedback of a maximum 1024-bit;

an STR support for indicating whether simultaneous independent transmission and reception is supported;

one or more of the following parameters are included in the PHY Capability:

an EHT MU with 4 × LTF +0.8 μ s GI to indicate whether reception of an EHU MU PPDU with 4 × LTF and 0.8 μ s guard interval is supported;

an 80MHz in 160/80+80MHz EHT PPDU for indicating whether Orthogonal Frequency Division Multiplexing Access (OFDMA) is supported using 160MHz or 80MHz +80MHz resource units over an 80MHz bandwidth;

an 80MHz in 320/160+160MHz EHT PPDU for indicating whether OFDMA is supported to be performed using 320MHz or 160MHz +160MHz resource units over an 80MHz bandwidth;

an 80MHz in 240/160+80MHz EHT PPDU for indicating whether OFDMA is supported for execution using 240MHz or 160MHz +80MHz resource units over an 80MHz bandwidth.

3. The method of claim 1, wherein the EHT operation includes one or more of the following parameters:

a Channel Width field for indicating a Channel bandwidth of an operation;

a CCFS field for indicating a channel center frequency band;

the Basic EHT-MCS and NSS set is used for indicating a modulation coding strategy supported by an EHT system corresponding to each group of space stream number in the receiving and transmitting of the EHT PPDU;

an Align start time of PPDU for indicating whether to start sending PPDU on different links at the same time;

an Align end time of PPDU for indicating whether to finish sending PPDU on different links at the same time.

4. The method of claim 1, wherein when the local parameter dot11multilink operation implemented indicates that the terminal supports multilink operation capability or indicates that the terminal supports multilink operation capability and starts the operation, or when the local parameter dot11 ehtonationimplemented indicates that the terminal supports EHT system capability or indicates that the terminal supports EHT system capability and enables, and the dot11multilink operation implemented indicates that the terminal supports multilink operation capability or indicates that the terminal supports multilink operation capability and starts the operation, and the terminal reads ML entries information in a beacon message or a probe response message of the scanned logical AP, the ML entries further including a parameter ML entries indicating multilink parameters of the access device.

5. The method of claim 4, wherein the parameters related to multi-link capability in the ML Elements are included in the EHT capabilities parameters, and the parameters related to multi-link operation in the ML Elements are included in the EHToperration parameters.

6. The method of claim 4, wherein the parameters related to multi-link Capability in the ML Elements are included in the MAC Capability of the EHT capabilities parameters, and the parameters related to multi-link operation in the ML Elements are included in the EHToperration parameters.

7. The method of claim 2, wherein when the local parameter dot11multilink operation implemented indicates that the terminal supports multilink operation capability or indicates that the terminal supports multilink operation capability and starts the operation, or when the local parameter dot11 ehtopitionfirmed indicates that the terminal supports EHT system capability or indicates that the terminal supports EHT system capability and enables, and the dot11multilink operation implemented indicates that the terminal supports multilink operation capability or indicates that the terminal supports multilink operation capability and starts the operation, and the terminal reads the elml Elements information in a beacon message or a probe response message of the scanned logical AP, the elml Elements parameter further includes a parameter elml Elements for indicating multilink parameters of the access device.

8. The method of claim 7, wherein the ML Elements are included in the MAC capabilities of the EHT capabilities parameters and the ML Elements include the Multi link support.

9. The method of claim 3, wherein when the local parameter dot11multilink operation implemented indicates that the terminal supports multilink operation capability or indicates that the terminal supports multilink operation capability and starts the operation, or when the local parameter dot11 ehtopentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfentinfenti.

10. The method of claim 9, wherein the ML Elements comprise the Align start time of PPDU and the Align end time of PPDU.

11. The method of any of claims 4-10, wherein the ML Elements comprise parameters MLD common info and STA info i, the MLD common info is used to indicate the multilink common parameters of the access device, the STA info is used to indicate the proprietary parameters of a single logical AP in the access device, 1 ≦ i ≦ n, and n is determined by the number of logical APs actually operating in the access device.

12. The method of claim 11, wherein the STAinfo i comprises a Link ID, a STA Capability, and a STA operation, wherein the Link ID is used to indicate an identity of a Link operated by the logical AP, the STA Capability is used to indicate a Capability parameter specific to the logical AP, and the STA operation is used to indicate an operation parameter specific to the logical AP.

13. The method of claim 1, further comprising:

after receiving the MLME-SCAN.confirm primitive, the high-level management unit stores BSSDescription information in BSSDescriptionSet parameters in the local;

when the current signal quality is reduced, or the current signal is lost, or the current network load is too heavy, the high-level management unit reads the logic AP information matched with the network capacity in the BSSDescription stored locally according to the capacity parameter stored locally, takes the logic AP which can meet the capacity of all terminals as candidate logic APs, measures the candidate logic APs, sorts the measurement signals, selects the logic AP with the best signal quality to compare with a preset connection threshold value T1, if the logic AP is higher than the connection threshold value T1, sends an MLME-JOIN.request primitive to the low-level management unit, if the logic AP with the best signal quality is lower than the connection threshold value T1, takes other logic APs as candidate logic APs, measures the logic APs, sorts the measurement signals, selects the logic AP with the best signal quality to compare with a preset connection threshold value T1, if the logic AP is higher than the connection threshold value T1, a MLME-join request primitive is sent to the lower management unit and if the logical AP with the best signal quality is lower than the connection threshold value T1, the current connection is maintained.

14. The method of claim 1, wherein the higher layer management unit is an equipment management unit (SME) or an application management unit (AME), and the lower layer management unit is a Media Access Control (MAC) layer management unit (MLME) or a physical layer management unit (PLME).

15. A method of wireless local area network synchronization, comprising:

scanning according to the method of wireless local area network scanning of any of claims 1-14;

16. The method of claim 15, wherein the STA-EHT Capabilities comprise MAC Capabilities and PHY Capabilities, and wherein the MAC Capabilities comprise one or more of the following parameters:

a Multi link support for indicating whether a multilink operation is supported;

one or more of the following parameters are included in the PHY Capability:

17. The method of claim 15, wherein the performing the synchronization operation comprises:

if the parameter SelectedBSS in the MLME-join.request primitive comprises a plurality of logical APs and the included logical APs all belong to the same access device, the access device is a multilink access device, timing synchronization is performed with the received logical AP designated in the MLME-join.request primitive, after synchronization is completed, the parameter ResultCode is set to indicate that synchronization is successful, and if the SelectedBSS in the primitive comprises a plurality of logical APs and the included logical APs belong to different access devices, the access devices are multilink access devices, the parameter ResultCode is set to indicate that the terminal cannot support all the operation parameters of the access devices.

18. The method of claim 15, wherein the performing the synchronization operation comprises:

if the parameter SelectdBSS in the MLME-JOIN.request primitive received by the lower layer management unit contains the parameter Basic EHT-MCS and NSS set, and if any < EHT-MCS, NSS > tuple which is not supported by the terminal is contained in the parameter, the ResultCode parameter value is set to be the operation parameter indicating that the terminal can not support all access devices, or indicating synchronization failure.

19. A terminal comprising a higher level management unit and a lower level management unit,

20. A terminal comprising a higher layer management unit and a lower layer management unit, wherein the terminal performs scanning according to the method of wireless local area network scanning according to any one of claims 1 to 14;

21. A terminal, characterized in that the terminal comprises a processor and a memory, in which at least one program code is stored, which is loaded and executed by the processor to implement the method of wireless local area network scanning according to any of claims 1-14 or the method of wireless local area network synchronization according to any of claims 15-18.

22. A storage medium having stored therein at least one program code, which is loaded and executed by a processor, to implement the method of wireless local area network scanning according to any one of claims 1 to 14 or the method of wireless local area network synchronization according to any one of claims 15 to 18.