WO2017041629A1 - Active scanning processing method and related device and communication system - Google Patents

Abstract

An active scanning processing method and related device and a communication system. The active scanning processing method comprises: an access point sending, at a receiving station of a first available channel, a detection request frame; the access point sending, at one sub-channel of multiple sub-channels of the first available channel, a detection response frame corresponding to the detection request frame; and the access point receiving, at the first available channel, an acknowledgement frame sent by the station with respect to the detection response frame. The technical solution provided by the embodiment of the present invention is beneficial to reducing the number of collisions for competition between the access points, and further reducing competition overhead and communication resource waste, and improving the overall performance of a system.

Description

Active scanning processing method and related device and communication system Technical field

The present invention relates to the field of wireless network technologies, and in particular, to an active scan processing method and related apparatus and a communication system.

Background technique

To become a member of a Wi-Fi wireless network, the STA (STA) needs to scan the Wi-Fi wireless network. Under the existing Wi-Fi standard IEEE 802.11 framework, there are two modes of passive scanning and active scanning for the STA to select to scan the Wi-Fi wireless network.

In the passive scanning mode, the STA needs to scan the beacon frame (Beacon frame) under each channel, and the Beacon frame contains the information of the wireless network for the STA to access. In the active scan mode, the STA actively sends a Probe Request frame. After the access point (AP, Access Point) receives the request from the STA, the AP can agree to the STA request if the condition is met. A probe response (Probe Response) frame is returned to the STA. Specifically, the AP listens to the channel state, and when the duration of the channel remains idle exceeds the duration of the distributed inter-frame space (DIFS), the backoff is started until the channel idle time is greater than the total backoff duration, that is, the backoff timing. By 0, the AP competes for a successful channel. The AP sends a Probe Response frame to the STA, and the STA that receives the Probe Response frame returns an acknowledgement frame (ACK frame) to the AP.

The inventor of the present invention found in the research and practice that the existing Wi-Fi technology uses the carrier sense multiple access (CSMA) mechanism, and the AP needs to compete for the entire channel in the active scan mode. To send a Probe Response frame. However, the number of neighboring APs and STAs is large in a dense deployment scenario. The number of APs participating in the competition may be large. This may increase the number of competitive collisions between APs, which may increase the competition overhead and waste of communication resources. Performance is reduced.

Summary of the invention

The embodiments of the present invention provide an active scanning processing method, a related device, and a communication system, so as to reduce the number of competitive collisions between APs, thereby reducing competition overhead and communication resource waste, thereby improving overall system performance.

A first aspect of the embodiments of the present invention provides an active scanning processing method, including:

The access point receives the probe request frame sent by the station at the first available channel;

The access point sends a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel;

The access point receives an acknowledgement frame sent by the station for the probe response frame on the first available channel.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the access point sends a probe response corresponding to the probe request frame on one of the plurality of subchannels of the first available channel The frame includes: the access point randomly selects one of the plurality of subchannels of the first available channel to send a probe response frame corresponding to the probe request frame.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in the second possible implementation manner of the first aspect, the probe request frame carries a subchannel division indication;

Before the access point sends the probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel, the method further includes: the access point is based on the child The channel division indication divides the first available channel into a plurality of subchannels.

With reference to the first aspect or the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the access point is one of the plurality of subchannels of the first available channel Before the subchannel sends the probe response frame corresponding to the probe request frame, the method further includes: the access point dividing the first available channel into multiple subchannels based on protocol configuration information.

With reference to the first aspect or any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the probe request frame is carried The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

With reference to the fourth possible implementation manner of the first aspect or the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, if the basic service of the probe request frame is The value of the unit color field is set to a specified color value, and the access point is an access point corresponding to the specified color value.

With reference to the first aspect or any one of the first to sixth possible implementation manners of the first aspect, in the seventh possible implementation manner of the first aspect, the access point is Receiving, by the first available channel, the acknowledgement frame sent by the station for the probe response frame includes: the access point receiving the station on the first available channel, and using orthogonal frequency division on the first available channel An acknowledgement frame for the probe response frame sent in multiple access mode or multicast mode or broadcast mode.

In conjunction with the first aspect or any one of the first to seventh possible embodiments of the first aspect, in an eighth possible implementation of the first aspect,

The method further includes:

Receiving, by the access point, the probe request frame sent by the station on a second available channel;

Sending, by the access point, a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the second available channel;

The access point receives an acknowledgement frame sent by the station for the probe response frame on the second available channel.

A second aspect of the embodiments of the present invention provides an active scanning processing method, including:

The station sends a probe request frame on the first available channel;

The station receives, on the first available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the first available channel;

The station transmits an acknowledgement frame for the probe response frame on the first available channel.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving, by the first available channel, the access point is sent by using one of the plurality of subchannels of the first available channel The probe response frame corresponding to the probe request frame includes: corresponding to the probe request frame sent by the first available channel receiving access point, which is randomly selected by one of the plurality of subchannels of the first available channel Probe response frame.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in the second possible implementation manner of the second aspect, the probe request frame carries a subchannel division indication, where the subchannel division The indication is for indicating that the access point divides the first available channel into multiple subchannels.

With reference to the second aspect or the first possible implementation manner of the second aspect, or the second possible implementation manner of the second aspect, in a third possible implementation manner of the second aspect, The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

With reference to the third possible implementation manner of the second aspect or the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner of the second aspect, if the basic service unit color of the probe request frame is The value of the field is set to a specified color value, and the access point is an access point corresponding to the specified color value.

With reference to the second aspect or any one of the first to fifth possible embodiments of the second aspect, in a sixth possible implementation of the second aspect, the An acknowledgment frame for the probe response frame is sent by the available channel, where the station sends the probe response frame in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner on the first available channel. Confirmation frame.

With reference to the second aspect or any one of the first to sixth possible embodiments of the second aspect, in a seventh possible implementation of the second aspect,

The method further includes:

Sending, by the station, the probe request frame on a second available channel; the station receiving, at the second available channel, the probe sent by an access point on one of a plurality of subchannels of the second available channel A probe response frame corresponding to the request frame; the station transmitting an acknowledgement frame for the probe response frame on the second available channel.

A third aspect of the present invention provides an access point, including:

a receiving unit, configured to receive, by the first available channel, a probe request frame sent by the station;

a sending unit, configured to send, according to one of the plurality of subchannels of the first available channel, a probe response frame corresponding to the probe request frame;

The receiving unit is further configured to receive, at the first available channel, the station for the detection The acknowledgement frame that should be sent by the frame.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the sending unit is specifically configured to randomly select one of the plurality of subchannels of the first available channel to send the probe request frame. Corresponding probe response frame.

With reference to the third aspect, or the first possible implementation manner of the third aspect, in the second possible implementation manner of the third aspect, the probe request frame carries a subchannel division indication; the access point further includes And a channel determining unit, configured to divide the first available channel into multiple subchannels according to the subchannel dividing instruction.

With the third aspect or the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the access point further includes a channel determining unit, configured to use the protocol configuration information The first available channel is divided into a plurality of subchannels.

With reference to the third aspect, or any one of the first to third possible implementation manners of the third aspect, in a fourth possible implementation manner of the third aspect, the probe request frame carries The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the fourth possible implementation manner of the third aspect, in a fifth possible implementation manner of the third aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

With reference to the fourth possible implementation manner of the third aspect or the fifth possible implementation manner of the third aspect, in a sixth possible implementation manner of the third aspect, if the basic service unit color of the probe request frame is The value of the field is set to a specified color value, and the access point is an access point corresponding to the specified color value.

With reference to the third aspect or any one of the first to sixth possible implementation manners of the third aspect, in the seventh possible implementation manner of the third aspect, the first available channel And receiving, by the receiving station, an acknowledgment frame sent by the station for the probe response frame, where the receiving unit is configured to: when the first available channel receives the station, use orthogonal frequency division on the first available channel. An acknowledgement frame for the probe response frame sent in the address mode or the multicast mode or the broadcast mode.

Combining any one of the first to seventh possible embodiments of the third aspect or the third aspect In a possible implementation manner of the third aspect, the receiving unit is further configured to receive, by using the second available channel, the probe request frame sent by the station;

The sending unit is configured to send, according to one of the plurality of subchannels of the second available channel, a probe response frame corresponding to the probe request frame;

The receiving unit is further configured to receive, on the second available channel, an acknowledgement frame sent by the station for the probe response frame.

A fourth aspect of the present invention provides a site, including:

a sending unit, configured to send a probe request frame on the first available channel;

a receiving unit, configured to receive, on the first available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the first available channel;

The sending unit is further configured to send an acknowledgement frame for the probe response frame on the first available channel.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving, by the first available channel, the access point is sent by using one of the plurality of subchannels of the first available channel The probe response frame corresponding to the probe request frame includes: corresponding to the probe request frame sent by the first available channel receiving access point, which is randomly selected by one of the plurality of subchannels of the first available channel Probe response frame.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in the second possible implementation manner of the fourth aspect, the probe request frame carries a subchannel division indication, where the subchannel division The indication is for indicating that the access point divides the first available channel into multiple subchannels.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, or the second possible implementation manner of the fourth aspect, in a third possible implementation manner of the fourth aspect, The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the third possible implementation manner of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

Combining a third possible implementation of the fourth aspect or a fourth possible implementation of the fourth aspect The fifth possible implementation manner of the fourth aspect, if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color The access point corresponding to the value.

With reference to the fourth aspect, or any one of the first to fifth possible implementation manners of the fourth aspect, in the sixth possible implementation manner of the fourth aspect, An aspect of the acknowledgement frame for the probe response frame is sent by the available channel: the sending unit is specifically configured to send the probe response in the orthogonal frequency division multiple access mode or the multicast mode or the broadcast mode on the first available channel. The confirmation frame of the frame.

With reference to the fourth aspect, or any one of the first to sixth possible implementation manners of the fourth aspect, in the seventh possible implementation manner of the fourth aspect, the sending unit is further used Transmitting the probe request frame on a second available channel;

The receiving unit is further configured to: receive, on the second available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the second available channel;

The sending unit is further configured to send an acknowledgement frame for the probe response frame on the second available channel.

A fifth aspect of the present invention provides an access point, including:

Processor, memory and antenna;

The processor is configured to perform the following steps by calling an instruction or code stored in the memory:

And detecting, by the antenna, a probe request frame sent by the station on the first available channel; transmitting, by the antenna, a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel; The antenna receives an acknowledgement frame sent by the station for the probe response frame on the first available channel.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the processor is specifically configured to randomly select one of the plurality of subchannels of the first available channel to send the probe request frame Corresponding probe response frame.

In combination with the fifth aspect or the first possible implementation of the fifth aspect, the second aspect of the fifth aspect In a possible implementation manner, the probe request frame carries a subchannel division indication, and the processor is further configured to divide the first available channel into multiple subchannels according to the subchannel division indication.

With reference to the fifth aspect, or the first possible implementation manner of the fifth aspect, in a third possible implementation manner of the fifth aspect, the access point further includes a channel determining unit, configured to use the protocol configuration information The first available channel is divided into a plurality of subchannels.

With reference to the fifth aspect, or any one of the first to third possible implementation manners of the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the probe request frame carries The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the fourth possible implementation manner of the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

With reference to the fourth possible implementation manner of the fifth aspect or the fifth possible implementation manner of the fifth aspect, in a sixth possible implementation manner of the fifth aspect, if the basic service unit color of the probe request frame is The value of the field is set to a specified color value, and the access point is an access point corresponding to the specified color value.

With reference to the fifth aspect or any one of the first to sixth possible implementation manners of the fifth aspect, in the seventh possible implementation manner of the fifth aspect, the processor is specifically used Receiving, by the antenna, the acknowledgement for the probe response frame sent by the station on the first available channel in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner on the first available channel. frame.

With reference to the fifth aspect or any one of the first to seventh possible implementation manners of the fifth aspect, in the eighth possible implementation manner of the fifth aspect, the processor is further used Receiving, by the antenna, the probe request frame sent by the station on a second available channel; transmitting, by using the antenna, the probe request frame corresponding to one of the plurality of subchannels of the second available channel Detecting a response frame; receiving, by the antenna, an acknowledgement frame sent by the station for the probe response frame on the second available channel.

A sixth aspect of the present invention provides a site, including:

Processor, memory and antenna;

Wherein, by invoking an instruction or code stored in the memory, the processor is configured to perform: transmitting, by the antenna, a probe request frame on a first available channel; receiving, by the antenna, on the first available channel And a sounding response frame corresponding to the sounding request frame sent by one of the plurality of subchannels of the first available channel; and transmitting, by the antenna, the probe response frame on the first available channel Confirm the frame.

In conjunction with the sixth aspect, in a first possible implementation manner of the sixth aspect, the processor is configured to receive, by using the antenna, a plurality of subchannels of an access point in the first available channel on the first available channel. a probe response frame corresponding to the probe request frame sent by one of the subchannels that is randomly selected.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in the second possible implementation manner of the sixth aspect, the probe request frame carries a subchannel division indication, where the subchannel division The indication is for indicating that the access point divides the first available channel into multiple subchannels.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, or the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, The value of the basic service unit color field is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate the basic service unit.

With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the basic service unit color field is carried by a high efficiency preamble of the probe request frame Let the -A field or the Efficient Signaling-B field.

With reference to the third possible implementation manner of the sixth aspect, or the fourth possible implementation manner of the sixth aspect, in the fifth possible implementation manner of the sixth aspect, if the basic service unit color of the probe request frame is The value of the field is set to a specified color value, and the access point is an access point corresponding to the specified color value.

With reference to the sixth aspect, or any one of the first to fifth possible implementation manners of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, An acknowledgment frame for the probe response frame transmitted by the antenna on the first available channel in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner.

Combining any one of the first to sixth possible embodiments of the sixth aspect or the sixth aspect In a seventh possible implementation manner of the sixth aspect, the processor is further configured to send, by using the antenna, the probe request frame on a second available channel; Receiving, by the second available channel, a sounding response frame corresponding to the sounding request frame sent by the access point on one of the plurality of subchannels of the second available channel; transmitting, by the antenna, the second available channel An acknowledgement frame of the probe response frame.

A seventh aspect of the present invention provides a communication system, including:

Any one of the access points provided by the embodiment of the present invention further includes any one of the sites provided by the embodiment of the present invention.

An eighth aspect of the invention provides a computer readable medium, a computer readable medium

The computer readable storage medium stores program code for active scanning processing. The program code includes instructions for performing the method of the first aspect or the second aspect.

It can be seen that, in the solution of the embodiment of the present invention, the available channel (such as the first available channel) can be logically divided into multiple subchannels, and after the first available channel receives the Probe Request frame sent by the STA, the AP is in the first available channel. One of the plurality of subchannels transmits a Probe Response frame corresponding to the Probe Request frame, so even if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, Sending a Probe Response frame on different subchannels of the available channel helps to avoid competing collisions of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Mechanism, this mechanism is relative to the traditional symmetric Probe Response frame reply mechanism (in which, in the traditional symmetric Probe Response frame reply mechanism, the AP receives the Probe Request frame on the entire available channel and replies to the corresponding Probe Response frame on the entire available channel. In terms of bandwidth, the transmit and receive frames are symmetrical. This helps reduce the number of competitive collisions between APs, which in turn helps reduce the competition overhead and waste of communication resources, and thus improves the overall performance of the wireless system.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments and the prior art description will be briefly described below. Obviously, the drawings in the following description are merely Some embodiments of the present invention may also be used to obtain other drawings based on these drawings without departing from the prior art.

FIG. 1 is a schematic diagram of a wireless network deployment architecture according to an embodiment of the present invention;

FIG. 1B is a schematic diagram of another wireless network deployment architecture according to an embodiment of the present invention;

FIG. 1 is a schematic diagram of another wireless network deployment architecture according to an embodiment of the present invention;

2 is a schematic flowchart of an active scan processing method according to an embodiment of the present invention;

3 is a schematic flowchart of another active scan processing method according to an embodiment of the present invention;

4A is a schematic flowchart of another active scan processing method according to an embodiment of the present invention;

4B is a schematic structural diagram of a Probe Request frame and a physical layer frame header according to an embodiment of the present invention;

4C is a schematic diagram of a frame interaction according to an embodiment of the present invention;

FIG. 5-A is a schematic flowchart of another active scan processing method according to an embodiment of the present invention;

FIG. 5-B is a schematic diagram of another frame interaction provided by an embodiment of the present invention;

FIG. 5-C is a schematic diagram of another frame interaction provided by an embodiment of the present invention;

FIG. 6 is a schematic flowchart of another active scan processing method according to an embodiment of the present invention; FIG.

FIG. 6-B is a schematic diagram of another frame interaction provided by an embodiment of the present invention; FIG.

FIG. 6-C is a schematic diagram of another frame interaction provided by an embodiment of the present invention; FIG.

FIG. 7 is a schematic diagram of an access point according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of another access point according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a station according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic diagram of another station according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic diagram of a communication system according to an embodiment of the present invention.

detailed description

The embodiments of the present invention provide an active scanning processing method, a related device, and a communication system, so as to reduce the number of competitive collisions between APs, thereby reducing competition overhead and communication resource waste, thereby improving overall system performance.

In order to make the object, the features and the advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It is to be understood that the embodiments described below are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The terms "first", "second", "third" and "fourth" and the like in the specification and claims of the present invention and the above drawings are used to distinguish different objects, and are not intended to describe a specific order. Moreover, the terms "comprises" and "comprising" and "comprising" are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or device that comprises a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units not listed, or, optionally, Other steps or units inherent to these processes, methods, products or equipment.

Referring to FIG. 1A, FIG. 1B, and FIG. 1C, FIG. 1A to FIG. 1C are schematic diagrams of three wireless network deployment architectures provided by an embodiment of the present invention. FIG. 1-A shows that there are multiple STAs in the signal coverage of multiple APs, and there are multiple STAs in the signal coverage of a single AP in FIG. 1-B, and multiple APs are illustrated in FIG. 1-C. There is a single STA in the signal coverage. The technical solution of the embodiment of the present invention may be specifically implemented based on the wireless network deployment architecture or its variant architecture illustrated in FIG. 1-A or FIG. 1-B or FIG.

Wherein, since there are overlapping areas in the signal coverage areas of the plurality of APs in FIG. 1-A and FIG. 1-C, when the STAs in the overlapping area perform active scanning, a competitive collision may occur between the APs. The technical solution of the embodiment of the present invention strives to reduce the number of competitive collisions between APs, thereby reducing competition overhead and waste of communication resources, thereby improving overall system performance.

The following is a description of the scheme from the perspective of the AP.

Referring to FIG. 2, FIG. 2 is a schematic flowchart diagram of an active scan processing method according to an embodiment of the present invention. As shown in FIG. 2, an active scanning processing method provided by an embodiment of the present invention may include:

S201. The AP receives a Probe Request frame sent by the STA on the first available channel.

The product form of the STA mentioned in the embodiments of the present invention may be, for example, a product form of a tablet computer, a notebook computer, a mobile internet device, a palmtop computer, a desktop computer, a mobile phone, or other user terminals.

For example, the STA may send a Probe Request frame on the first available channel, for example, the STA may be in the first A Probe Request frame is sent over the entire bandwidth of the available channel. Correspondingly, the AP may receive a Probe Request frame sent by the STA on the first available channel on the first available channel, for example, the AP may receive the Probe Request frame on the entire bandwidth of the first available channel.

The number of available channels for communication interaction provided to the AP and the STA may be N, and the first available channel is one of N available channels. For example, the available channels for communication interactions provided to the APs and STAs may include only the first available channel, or the available channels for communication interactions provided to the APs and STAs may include the first available channel and the second channel, and the like. Of course, the number of available channels for communication interactions provided to the AP and STA can be more.

The bandwidths of the N available channels may be equal or partially equal or unequal to each other. For example, the bandwidth of the first available channel may be equal to 20M or the like.

Wherein, the N may be an integer greater than or equal to 1.

For example, the N can be, for example, equal to 1, 2, 3, 4, 5, 6, 7, 8, 9, or other values.

S202. The AP sends a Probe Response frame corresponding to the Probe Request frame on one of the plurality of subchannels of the first available channel.

The AP sends the Probe Response frame corresponding to the Probe Request frame on one of the plurality of subchannels of the first available channel, and the AP can be regarded as an OFDM in the orthogonal frequency division multiple access manner on the first available channel. The Probe Response frame corresponding to the Probe Request frame is sent, that is, the AP does not send the Probe Response frame corresponding to the Probe Request frame in the entire bandwidth of the first available channel, but sends the Probe Response frame corresponding to the Probe Request frame in a part of the bandwidth of the first available channel.

Wherein, the available channel (such as the first available channel) can be logically divided into multiple subchannels (which can be represented as K subchannels). The K may be an integer greater than or equal to two. The bandwidths of the K subchannels may be equal or partially equal or unequal to each other, that is, the spacing between the K subchannels may be equal or partially equal or unequal to each other.

For example, one subchannel may be equivalent to one or more resource units.

For example, the K can be equal to 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 29, 36 or other values.

In practical applications, the AP may determine how to divide an available channel (eg, the first available channel) into multiple (K) subchannels based on various ways.

For example, before the one of the first available channels of the first available channel sends the Probe Response frame corresponding to the Probe Request frame, the method may further include: the AP dividing the first available channel according to protocol configuration information. Is a plurality (K) of subchannels, wherein the K is a positive integer greater than or equal to 2. That is, the related protocol may stipulate how to divide the available channels (such as the first available channel) into K subchannels, and the AP may divide the first available channel into multiples (K according to the provisions of the relevant protocol). ) Subchannel.

For example, the Probe Request frame carries a subchannel division indication, and before the AP sends the Probe Response frame corresponding to the Probe Request frame on one of the first available channels, the method may further include: The AP divides the first available channel into a plurality of (K) subchannels based on the subchannel division indication. The subchannel division indication may, for example, indicate the value of K, that is, the subchannel division indication may indicate the number of subchannels that the AP can use, and may even indicate the bandwidth or resource location of each of the K subchannels, and the like.

Optionally, in some possible implementation manners of the disclosure, the subchannel division indication may be carried in an AP configuration information field carried in a Probe Request frame, where the AP Configuration information field may be carried in, for example, the HE-SIG-B ( The Efficient Signaling-B) field is either carried elsewhere in the Probe Request frame.

S203. The AP receives, on the first available channel, an acknowledgement frame sent by the STA for the Probe Response frame.

The STA may send an acknowledgement frame sent for the Probe Response frame on the first available channel, for example, the STA may send an acknowledgement frame sent for the Probe Response frame on the entire bandwidth of the first available channel. Correspondingly, the AP may receive, on the first available channel, an acknowledgement frame sent by the STA on the first available channel for the Probe Response frame, for example, the AP may receive the probe response frame on the entire bandwidth of the first available channel. The confirmation frame sent.

It can be seen that, in the technical solution of the embodiment, since the available channel (such as the first available channel) can be logically divided into multiple subchannels, the AP is available in the first available after receiving the Probe Request frame sent by the STA on the first available channel. One of the plurality of subchannels of the channel transmits a Probe Response frame corresponding to the Probe Request frame. Therefore, if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, Not on the same available channel Sending a Probe Response frame with the same subchannel helps to avoid the competitive collision of the multiple APs. It can be seen that the foregoing solution in this embodiment introduces an innovative mechanism that an AP can reply to a corresponding Probe Response frame in one subchannel of an available channel of a Probe Request frame. This innovative mechanism can be regarded as an asymmetric type (transceiver bandwidth is not Symmetrically) Probe Response frame reply mechanism, which is relative to the traditional symmetric Probe Response frame reply mechanism (in which, in the traditional symmetric Probe Response frame reply mechanism, the AP receives the Probe Request frame over the available channels and is available throughout The channel responds to the corresponding Probe Response frame, and the sending and receiving frames are symmetric in bandwidth. In this case, it helps to reduce the number of competitive collisions between APs, which is beneficial to reduce the competition overhead and waste of communication resources, and thus improve the overall performance of the wireless system.

Optionally, in some possible implementation manners, the sending, by the AP, the Probe Response frame corresponding to the Probe Request frame in one of the multiple subchannels of the first available channel, the AP may include: One of the plurality of subchannels of the first available channel randomly selects one of the subchannels to transmit a Probe Response frame corresponding to the Probe Request frame, or the AP may send the designated subchannel of the plurality of subchannels of the first available channel. a Probe Response frame corresponding to the Probe Request frame, where the designated subchannel that sends the Probe Response frame corresponding to the Probe Request frame may be specified by the STA.

Optionally, in some possible implementation manners of the present invention, a value of a basic service unit (BSS) color field (BSS_color field) of the Probe Request frame may be set to a wildcard (such as a wildcard) or Specify the color value. The BSS_color field is used to indicate a basic service unit. For example, different color values may be used to specify different basic service units. For example, the BSS_color field takes a value of 1 and the BSS_color field takes a value of 2 to indicate that a different BSS is specified.

Therefore, the AP can be used to define the AP. For example, when the value of the BSS_color field is set to the specified color value, it may indicate that the AP that belongs to the BSS specified by the specified color value is required to reply to the corresponding Probe Response frame, for example, when the Probe Request frame is used. The value of the BSS_color field is set to a specified color value, and the AP is an AP corresponding to the specified color value, that is, the AP belongs to the BSS specified by the specified color value. For another example, when the value of the BSS_color field is set to a wildcard, it may indicate a reply to the Probe Response. The BSS to which the AP of the frame belongs is not required, that is, the APs belonging to any BSS have the right to reply to the Probe Response frame corresponding to the Probe Request frame.

Optionally, in some possible implementation manners of the present disclosure, the BSS_color field may be carried in a High Efficiency Preamble High Efficiency Signaling-A (HE-SIG-A) field of a Probe Request frame. In the Efficient Signaling-B (HE-SIG-B) field, for example, the BSS_color field may be carried in a common part field of the HE-SIG-B field. Of course, the BSS_color field may also be carried in other fields of the HE Preamble of the Probe Request frame.

Optionally, in some possible implementation manners of the present disclosure, the receiving, by the AP, the acknowledgement frame sent by the STA for the Probe Response frame on the first available channel includes: the AP receiving the first available channel An acknowledgment frame (ACK frame) for the Probe Response frame transmitted by the STA on the first available channel in a multicast mode or a broadcast mode or an Orthogonal Frequency Division Multiple Access (OFDMA) manner. The acknowledgement frame may be in the form of, for example, a block acknowledgement (BA, Block ACK) / a multi-user block acknowledgment (M-BA).

Optionally, in some possible implementation manners of the present invention, the STA may further declare the capability information of the STA itself in a HE Capability field or other field carried in the MAC payload of the Probe Request frame, where the STA itself The capability information may indicate that the STA is capable of receiving an OFDMA-type data packet. After obtaining the capability information, the AP can learn the capability of the STA that sends the Probe Request frame, and then can respond to the corresponding Probe Response frame in the OFDMA mode. Accordingly, the STA can receive the corresponding Probe Response frame replied by the AP in the OFDMA mode on the first available channel. And an acknowledgement frame (ACK frame) for the Probe Response frame transmitted in the OFDMA mode (or multicast mode or broadcast mode) on the first available channel.

Optionally, in some possible implementation manners of the present invention, the method may further include:

Receiving, by the AP, the Probe Request frame sent by the STA on a second available channel, where the AP sends a Probe Response frame corresponding to the Probe Request frame on one of the plurality of subchannels of the second available channel. The AP receives an acknowledgement frame sent by the STA for the Probe Response frame on the second available channel.

The STA may send the Probe Request frame on the second available channel, and correspondingly, the AP may The Probe Request frame sent by the STA on the second available channel is received on the second available channel. For example, the STA may send the Probe Request frame on the first available channel and the second available channel at the same time or at the same time, and the AP may receive the Probe Request frame sent by the STA on the second available channel and the first available channel, respectively. .

That is, the STA can send the Probe Request frame on multiple available channels, and the AP can respectively reply to the corresponding Probe Response frame for multiple available channels, which is beneficial to improving the success rate of the STA active scanning.

The scenario description is made below from the perspective of the STA.

Referring to FIG. 3, FIG. 3 is a schematic flowchart diagram of another active scan processing method according to another embodiment of the present invention. As shown in FIG. 3, another active scanning processing method provided by another embodiment of the present invention may include:

S301. The STA sends a Probe Request frame on the first available channel.

The product form of the STA mentioned in the embodiments of the present invention may be, for example, a product form of a tablet computer, a notebook computer, a mobile internet device, a palmtop computer, a desktop computer, a mobile phone, or other user terminals.

For example, the STA may send a Probe Request frame over the entire bandwidth of the first available channel. The AP may receive a Probe Request frame sent by the STA on the first available channel on the first available channel, for example, the AP may receive the Probe Request frame on the entire bandwidth of the first available channel.

S302. The STA may receive, in the first available channel, a Probe Response frame corresponding to the Probe Request frame sent by an AP on one of the plurality of subchannels of the first available channel.

The AP sends the Probe Response frame corresponding to the Probe Request frame on one of the plurality of subchannels of the first available channel, and the AP can be regarded as an OFDM in the orthogonal frequency division multiple access manner on the first available channel. The Probe Response frame corresponding to the Probe Request frame is sent, that is, the AP does not send the Probe Response frame corresponding to the Probe Request frame in the entire bandwidth of the first available channel, but sends the Probe Response frame corresponding to the Probe Request frame in a part of the bandwidth of the first available channel. Therefore, the STA is specifically a Probe Response frame corresponding to the Probe Request frame sent by the AP on the first available channel in an orthogonal frequency division multiple access manner on the first available channel.

For example, the STA may receive, in the first available channel, a Probe Response frame corresponding to the Probe Request frame sent by the AP on a randomly selected one of the plurality of subchannels of the first available channel. Alternatively, the STA may receive, in the first available channel, a Probe Response frame corresponding to the Probe Request frame sent by the AP on one of the plurality of subchannels of the first available channel.

S303. The STA sends an acknowledgement frame for the Probe Response frame on the first available channel.

For example, the STA may send an acknowledgment frame sent for the Probe Response frame on the entire bandwidth of the first available channel, or the STA may send an acknowledgment frame sent for the Probe Response frame in the OFDMA of the first available channel. Correspondingly, the AP may receive, on the first available channel, an acknowledgement frame sent by the STA on the first available channel for the Probe Response frame, for example, the AP may receive the probe response frame on the entire bandwidth of the first available channel. The confirmation frame sent.

It can be seen that, in the technical solution of the embodiment, since the available channel (such as the first available channel) can be logically divided into multiple subchannels, the AP is in the first after receiving the Probe Request frame sent by the STA on the first available channel. The Probe Response frame corresponding to the Probe Request frame is sent by one of the plurality of subchannels of the available channel. Therefore, if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, It is to send a Probe Response frame on different subchannels of the same available channel, which is beneficial to avoid the competitive collision of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Mechanism, this mechanism is relative to the traditional symmetric Probe Response frame reply mechanism (wherein, in the traditional symmetric Probe Response frame reply mechanism, the AP responds to the corresponding Probe Response frame by receiving the entire available channel of the Probe Request frame) It is beneficial to reduce the number of competitive collisions between APs, which is beneficial to reduce the competition overhead and waste of communication resources, and thus improve the overall performance of the wireless system.

Optionally, in some possible implementation manners of the present disclosure, the Probe Request frame may carry a subchannel division indication, where the subchannel division indication is used to indicate that the AP divides the first available channel into Multiple (K) subchannels.

Optionally, in some possible implementation manners of the present invention, the value of the basic service unit color field of the Probe Request frame is set to a wildcard or a specified color value.

Optionally, in some possible implementation manners of the present disclosure, the basic service unit color field is carried in an Efficient Signaling-A field or an Efficient Signaling-B field of the high-efficiency preamble carried in the Probe Request frame. .

Optionally, in some possible implementation manners of the present invention, if the value of the basic service unit color field of the Probe Request frame is set to a specified color value, the AP is an AP corresponding to the specified color value. .

Optionally, in some possible implementation manners of the present disclosure, the STA sends an acknowledgement frame for the Probe Response frame on the first available channel, where the STA includes the OFDMA on the first available channel. An acknowledgement frame for the Probe Response frame sent in multicast mode or broadcast mode.

Optionally, in some possible implementation manners of the present invention, the method further includes:

Sending, by the STA, the Probe Request frame on a second available channel; the STA receiving, on the second available channel, the Probe Request frame sent by an AP on one of the plurality of subchannels of the second available channel Corresponding Probe Response frame; the STA sends an acknowledgement frame for the Probe Response frame on the second available channel.

Correspondingly, the AP may receive the Probe Request frame sent by the STA on the second available channel on the second available channel. For example, the STA may send the Probe Request frame on the first available channel and the second available channel at the same time or at the same time, and the AP may receive the Probe Request frame sent by the STA on the second available channel and the first available channel, respectively. .

That is, the STA can send the Probe Request frame on multiple available channels, and the AP can respectively reply to the corresponding Probe Response frame for multiple available channels, which is beneficial to improving the success rate of the STA active scanning.

In order to facilitate a better understanding and implementation of the above technical solutions of the embodiments of the present invention, some application scenarios of the embodiments of the present invention are described in detail below.

Referring to FIG. 4-A, FIG. 4-A is a schematic flowchart diagram of another active scan processing method according to another embodiment of the present invention. The active scanning processing method illustrated in FIG. 4-A can be in FIG. 1-A or FIG. 1-B. Or the specific implementation in the wireless network deployment architecture shown in the example of FIG. 1-C.

As shown in FIG. 4A, another active scanning processing method provided by another embodiment of the present invention may include:

S401, STA#1 sends Probe Request frame #1 on available channel #1.

The structure of a possible Probe Request frame #1 and the physical layer frame header may be exemplified in FIG. 4-B.

For example, as shown in FIG. 4-B, the physical layer frame header carried by the Probe Request frame #1 includes a legacy preamble and a high efficiency preamble. The high-efficiency preamble carried in the Probe Request frame #1 may carry the HE-SIG-A field, and may or may not carry the HE-SIG-B field.

In this embodiment, it is assumed that the value of the BSS_color field carried in the Probe Request frame #1 is set to a specified color value.

Optionally, in some possible implementation manners of the present disclosure, the BSS_color field may be carried in a HE-SIG-A field or a HE-SIG-B field of a High Efficiency Preamble carried in a Probe Request frame, for example. The BSS_color field may be carried in the public part field of the HE-SIG-B field. Of course, the BSS_color field may also be carried in other locations of the HE Preamble carried in the Probe Request frame.

The available channel #1 may have a bandwidth of 20M or other bandwidth.

S402 and AP#1 receive the Probe Request frame #1 sent by STA#1 on the available channel #1, and AP#1 determines whether the AP#1 belongs to the BSS specified by the color value carried in the BSS_color field carried by the Probe Request frame #1.

If yes (indicating that AP#1 has the right to reply to the corresponding Probe Response frame), step S403 is performed.

If no (indicating that AP#1 does not have the right to reply to the corresponding Probe Response frame), AP#1 can ignore the received Probe Request frame #1, that is, AP#1 does not reply to the Probe Response frame corresponding to Probe Request frame #1.

S403 and AP#1 randomly select one subchannel among the plurality of subchannels of the available channel #1 to transmit the Probe Response frame #p1 corresponding to the Probe Request frame #1.

Optionally, in some possible implementation manners of the present invention, if AP#1 is available channel #1 After receiving Probe Request frame #1, AP#1 can be used after the time interval xIFS (xIFS<DIFS (where xIFS value is x, for example, xIFS=SIFS=16us, DIFS=34us, xIFS<DIFS)) The Legacy Preamble and the High Efficiency Preamble are transmitted on the channel #1, and one of the plurality of subchannels (for example, 9 subchannels) of the available channel #1 is randomly selected to transmit the Probe Response frame #p1 corresponding to the Probe Request frame #1.

The AP #1 randomly selects one subchannel among the plurality of subchannels of the available channel #1 to transmit the Probe Response frame #p1 corresponding to the Probe Request frame #1, and can be regarded as the AP#1 in the available channel #1 in the OFDMA mode. Send the Probe Response frame #p1 corresponding to the Probe Request frame #1.

The case where multiple APs send a Probe Response frame in the OFDMA manner on the available channel #1 may be exemplified in FIG. 4-C. The example shown in FIG. 4-C is mainly an example in which a plurality of APs transmit a Probe Response frame on different subchannels of the available channel #1.

S404, STA#1 receives the Probe Response frame #p1 sent by AP#1 on one subchannel randomly selected among the plurality of subchannels of the available channel #1 in the available channel #1, wherein the STA#1 correctly receives the Probe Response frame. #p1, then STA#1 sends an acknowledgement frame #a1 for the Probe Response frame #p1 on the available channel #1. Correspondingly, AP#1 can receive the acknowledgement frame #a1 sent by STA#1 on the available channel #1.

It can be understood that when STA#1 is still in the coverage of the signal coverage of other APs, the interaction mode between other APs and STA#1 can be similar to the interaction mode between AP#1 and STA#1. analogy.

It should be noted that, in the case that the AP#1 sends the Probe Response frame #p1 without a collision with other APs, the Probe Response frame #p1 can normally be correctly received by STA#1, and in AP#1. When the Probe Response frame #p1 is sent and the other AP#1 generates a random collision (a competitive collision occurs, that is, other APs use the same subchannel in the same time period or at the same time, and the Probe Response frame corresponding to the Probe Request frame #1 is also transmitted. ), Probe Response frame #p1 is usually not received correctly by STA#1.

It can be seen that, in the technical solution of the embodiment, since the available channel #1 can be logically divided into multiple subchannels, the AP#1 receives the Probe Request frame after the available channel #1 is sent to the available channel#1. Randomly selecting one subchannel among a plurality of subchannels of 1 to transmit a Probe Request frame corresponding The Probe Response frame, that is, AP#1 can transmit the Probe Response frame corresponding to the Probe Request frame in the OFDMA mode on the available channel #1, so even if there are multiple APs including AP#1 in a certain scenario, they are sent on the same available channel. Probe Response frame, if multiple APs send Probe Response frames on different subchannels of the same available channel in the same time period, it is beneficial to avoid the competition collision between the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can randomly select one subchannel to reply to the corresponding Probe Response frame in multiple subchannels of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric type. Probe Response frame reply mechanism. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism helps to reduce the number of competitive collisions between APs, which is beneficial to reduce the competition overhead and waste of communication resources, and thus improve the overall performance of the wireless system. .

Referring to FIG. 5-A, FIG. 5-A is a schematic flowchart diagram of another active scan processing method according to another embodiment of the present invention. The active scan processing method illustrated in FIG. 5-A can be embodied in the wireless network deployment architecture illustrated in FIG. 1-A or 1-C. As shown in FIG. 5-A, another active scanning processing method provided by another embodiment of the present invention may include:

S501, STA#1 sends Probe Request frame #1 on available channel #1.

The structure of a possible Probe Request frame #1 and the physical layer frame header may be exemplified in FIG. 4-C.

The available channel #1 may have a bandwidth of 20M or other bandwidth.

S502, AP#1 receives the Probe Request frame #1 sent by STA#1 on the available channel #1, and AP#1 randomly selects one subchannel among the plurality of subchannels of the available channel #1 to transmit the corresponding Probe Request frame #1. Probe Response frame #p1.

Optionally, in some possible implementation manners of the present invention, if AP#1 receives Probe Request frame #1 on available channel #1, AP#1 may be after time interval xIFS (xIFS<DIFS(where, xIFS) The value is x, for example, xIFS=SIFS=16us, DIFS=34us, xIFS<DIFS), and the Legacy Preamble and High Efficiency Preamble are transmitted on the available channel #1 above, and multiple subchannels of the available channel #1 (such as 9) One of the subchannels is randomly selected to send a Probe Response frame #p1 corresponding to the Probe Request frame #1. That is to say, AP#1 can transmit the Probe Response frame #p1 corresponding to the Probe Request frame #1 in the OFDMA manner on the available channel #1.

S503, STA#1 receives the Probe Response frame #p1 transmitted by AP#1 on one of the plurality of subchannels of the available channel #1, and the STA#1 transmits the available channel #1 on the available channel #1. Confirmation frame #a1 of Probe Response frame #p1. Correspondingly, AP#1 can receive the acknowledgement frame #a1 sent by STA#1 on the available channel #1.

S504 and AP#2 receive the Probe Request frame #1 sent by STA#1 on the available channel #1, and AP#2 randomly selects one subchannel among the plurality of subchannels of the available channel #1 to transmit the corresponding Probe Request frame #1. Probe Response frame #p2.

Optionally, in some possible implementation manners of the present invention, if AP#2 receives Probe Request frame #1 on available channel #1, AP#2 may be after time interval xIFS (xIFS<DIFS (xIFS value is x, for example, xIFS=SIFS=16us, DIFS=34us, xIFS<DIFS)), transmitting Legacy Preamble and High Efficiency Preamble on the available channel #1 above, and may be on multiple subchannels of available channel #1 (eg, 9 subchannels) Among them, one of the Probe Response frames #p2 corresponding to the one of the Probe Request frame #1 is randomly selected. That is to say, AP#2 can transmit the Probe Response frame #p2 corresponding to the Probe Request frame #1 in the OFDMA manner on the available channel #1.

S505, STA#1 receives the Probe Response frame #p2 transmitted by AP#2 on one of the plurality of subchannels of the available channel #1, and the STA#1 transmits the available channel #1 on the available channel #1. Confirmation frame #a2 of Probe Response frame #p2. Correspondingly, AP#2 can receive the acknowledgement frame #a2 sent by STA#1 on the available channel #1.

It can be understood that if the subchannel used by AP#1 to send Probe Response frame #p1 is different from the subchannel used by AP#2 to send Probe Response frame #p2, then no competing collision occurs between AP#1 and AP#2 (collision) ). On the other hand, if the subchannel used by AP#1 to send Probe Response frame #p1 is the same as the subchannel used by AP#2 to send Probe Response frame #p2, a competing collision occurs between AP#1 and AP#2.

It can be understood that there is no necessary execution sequence between step S502 to step S503 and step S504 to step S505. For example, step S502 to step S503 and step S504 to step S505 can be performed in the same time period.

Of course, in addition to AP#1 and AP#2, there may be other one or more APs that can receive Probe Request frame #1 on available channel #1, and these APs respond to Probe Request frame #1. The method is similar to AP#1 and AP#2.

For example, as shown in Figure 5-B, APs such as AP#1, AP#2, AP#3, AP#4, AP#5, and AP#6 can reply to the corresponding Probe Response frame in a similar manner. In FIG. 5-C, AP#1, AP#2, AP#3, and AP#6 respectively select different subchannels of available channel #1 to transmit corresponding Probe Response frames, and AP#4 and AP#5 are available due to selection. The same subchannel of channel #1 transmits the corresponding Probe Response frame, thus generating a random collision, which causes STA#1 to not correctly receive the corresponding Probe Response frame sent by AP#4 and AP#5.

For example, in a dense scenario, the number of APs that can receive (hear) the Probe Request frame of the STA may be much larger than the number of available subchannels of the available channel. When the AP randomly selects the subchannel to reply to the corresponding Probe Response frame, it is inevitable. There will be some subchannels selected by multiple APs, which in turn will generate a competitive collision of the Probe Response frame. In the case of a competitive collision, when the STA is ready to receive the Probe Response frame on the available channel, the STA can usually detect the signal energy of the corresponding subchannel but cannot correctly interpret it (ie, the corresponding Probe Response frame cannot be correctly received), if most of the subchannels are If there is such a result, the STA can consider that the current scenario is a denser deployment scenario, and the number of APs is relatively large. Therefore, the AP may randomly select a subchannel to transmit a corresponding collision response frame, and the number of APs may be relatively large. It may not be sufficient to complete the full identification of the currently available wireless network. The STA may trigger the Probe Request frame to continuously perform active scanning after replying the ACK frame to the AP, for example, as shown in the example of FIG. 5-C. The AP that has responded to the corresponding Probe Response frame in the previous scan and successfully receives the corresponding ACK frame of the STA reply may no longer participate in the current scan, and only the AP that has not obtained the corresponding ACK frame participates in the random selection of the subchannel and sends in the current scan. The flow of the Probe Response frame.

For example, in the scenario illustrated in FIG. 5-C, during the first active scanning process of the STA, including AP#4, AP#5, AP#6, AP#7, AP#8, and AP#9. When several APs reply to the corresponding Probe Response frame, a competitive collision occurs, and several APs including AP#1, AP#2, AP#3, and AP#10 do not have a competitive collision. The STA finds that there are many times of competitive collisions, so the second active scan is initiated. The AP#1, AP#2, AP#3, and AP#10 successfully identified during the first active scan are not in the second active scanning process. Responding to the corresponding Probe Response frame, in the scenario shown in Figure 5-C, through the second active scanning process, including AP#4, AP#5, AP#6, AP#7, AP#8 Several APs, such as AP#9, were also successfully identified by the STA.

When the second active scan sends a Probe Request frame, the STA can maintain the previous round of related parameter configuration, or reconfigure the new parameters and indicate in the Probe Request frame. For example, the STA can increase the number of subchannels of the available channel. Large to further reduce the probability of random collisions. Of course, if a number of competing collisions exceeding a set threshold occurs during the second active scan, the SAT may initiate an active scan again.

It can be seen that, in the technical solution of the embodiment, since the available channel #1 can be logically divided into multiple subchannels, multiple APs including AP#1 and AP#2 are receiving STA#1 in the available channel# After the probe request frame is sent, one of the plurality of subchannels of the available channel #1 can be randomly selected to send the Probe Response frame corresponding to the Probe Request frame, that is, each AP can send the Probe in the OFDMA mode on the available channel #1. The Probe Response frame corresponding to the Request frame. Therefore, if multiple APs send Probe Response frames on different subchannels of the same available channel in the same time period, it is beneficial to avoid the competition collision between the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can randomly select one subchannel to reply to the corresponding Probe Response frame in multiple subchannels of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric type. Probe Response frame reply mechanism. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism helps to reduce the number of competitive collisions between APs, which is beneficial to reduce the competition overhead and waste of communication resources, and thus improve the overall performance of the wireless system. .

Referring to FIG. 6-A, FIG. 6-A is a schematic flowchart diagram of another active scan processing method according to another embodiment of the present invention. The active scan processing method illustrated in FIG. 6-A can be embodied in the wireless network deployment architecture illustrated in FIG. 1-A or FIG. 1-C. As shown in the example of FIG. 6-A, another active scanning processing method provided by another embodiment of the present invention may include:

S601, STA#1 respectively send Probe Request frame #1 on available channel #1, available channel #2, available channel #3, and available channel #4.

In this embodiment, it is assumed that the value of the BSS_color field carried in the Probe Request frame #1 is set to a wildcard, that is, the BSS to which the AP that replies to the Probe Response frame belongs is not required, that is, belongs to any The APs of the BSS have the right to reply to the Probe Response frame corresponding to the Probe Request frame #1.

For example, the available channel #1 may have a bandwidth of 20M or other bandwidth, and the available channel #2, available channel #3, and available channel #4 may have the same or different bandwidth than the available channel #1. The bandwidths of available channel #1, available channel #2, available channel #3, and available channel #4 may be partially the same or identical or different from each other.

S602 and AP#1 respectively receive the Probe Request frame #1 sent by the STA#1 in the available channel #1 and the available channel #2, and the AP#1 finds the color value wildcard carried in the BSS_color field carried by the Probe Request frame #1, so It is determined that AP#1 has the right to reply to the corresponding Probe Response frame. AP#1 randomly selects one subchannel among the plurality of subchannels of available channel #1 to transmit Probe Response frame #p1 corresponding to the Probe Request frame #1, and AP#1 may also be in multiple subchannels of available channel #2. One of the subchannels is randomly selected to transmit the Probe Response frame #p1 corresponding to the Probe Request frame #1.

S603, STA#1 receives the Probe Response frame #p1 transmitted by the AP#1 randomly selected one of the plurality of subchannels of the available channel #1 in the available channel #1, wherein the STA#1 is the correct slave available channel# 1 Upon receiving the Probe Response frame #p1, STA#1 transmits an acknowledgement frame #a1 for the Probe Response frame #p1 on the available channel #1.

And, STA#1 can receive the Probe Response frame #p1 transmitted by the AP#1 randomly selected one of the plurality of subchannels of the available channel #2 on the available channel #2, wherein the STA#1 if the correct slave channel is available #2 receives the Probe Response frame #p1, then STA#1 transmits the acknowledgement frame #a1 for the Probe Response frame #p1 on the available channel #2.

S604 and AP#2 respectively receive the Probe Request frame #1 sent by the STA#1 in the available channel #1 and the available channel #3, and the AP#2 finds the color value wildcard carried in the BSS_color field carried by the Probe Request frame #1, so It is determined that AP#2 has the right to reply to the corresponding Probe Response frame. AP#2 randomly selects one subchannel among the plurality of subchannels of available channel #1 to transmit Probe Response frame #p2 corresponding to the Probe Request frame #1, and AP#2 may also be in multiple subchannels of available channel #3. One of the subchannels is randomly selected to transmit the Probe Response frame #p2 corresponding to the Probe Request frame #1.

S605, STA#1 receives the Probe Response frame #p2 transmitted by the AP#2 randomly selected one of the plurality of subchannels of the available channel #1 in the available channel #1, wherein the STA#1 is correct. Upon receiving the Probe Response frame #p2 from the available channel #1, STA#1 transmits the acknowledgement frame #a2 for the Probe Response frame #p2 on the available channel #1.

And, STA#1 can receive the Probe Response frame #p2 transmitted by AP#2 on one subchannel randomly selected among the plurality of subchannels of the available channel #3 on the available channel #3, wherein STA#1 if the correct slave channel is available #3 receives the Probe Response frame #p2, then STA#1 transmits the acknowledgement frame #a2 for the Probe Response frame #p2 on the available channel #3.

S606 and AP#3 respectively receive the Probe Request frame #1 sent by STA#1 in the available channel #2 and the available channel #4, and the AP#3 finds the color value wildcard carried in the BSS_color field carried by the Probe Request frame #1, so It is determined that AP#3 has the right to reply to the corresponding Probe Response frame. AP#3 randomly selects one subchannel among the plurality of subchannels of available channel #2 to transmit Probe Response frame #p3 corresponding to the Probe Request frame #1, and AP#3 may also be in multiple subchannels of available channel #4. One of the subchannels is randomly selected to transmit the Probe Response frame #p3 corresponding to the Probe Request frame #1.

S607, STA#1 receives, in available channel #2, Probe Response frame #p3 transmitted by AP#3 randomly selected one of the plurality of subchannels of available channel #2, where STA#1 is the correct slave available channel# 2 Upon receiving the Probe Response frame #p3, STA#1 transmits the acknowledgement frame #a3 for the Probe Response frame #p3 on the available channel #2.

And, STA#1 can receive the Probe Response frame #p3 transmitted by AP#3 on one of the plurality of subchannels of the available channel #4, which is transmitted from the available channel, in the available channel #4, if the correct one is from the available channel. #4 receives the Probe Response frame #p3, then STA#1 transmits the acknowledgement frame #a3 for the Probe Response frame #p3 on the available channel #4.

S608 and AP#4 respectively receive the Probe Request frame #1 sent by STA#1 on the available channel #3 and the available channel #4, and AP#4 finds the color value wildcard carried in the BSS_color field carried by the Probe Request frame #1, so It is determined that AP#4 has the right to reply to the corresponding Probe Response frame. AP#4 randomly selects one subchannel among the plurality of subchannels of available channel #3 to transmit Probe Response frame #p4 corresponding to the Probe Request frame #1, and AP#4 may also be in multiple subchannels of available channel #4. One of the subchannels is randomly selected to transmit the Probe Response frame #p4 corresponding to the Probe Request frame #1.

S609, STA#1 receives the Probe Response frame #p4 transmitted by the AP#4 randomly selected one of the plurality of subchannels of the available channel #3 in the available channel #3, wherein the STA#1 if the correct slave channel # 3 When the Probe Response frame #p4 is received, STA#1 transmits the acknowledgement frame #a4 for the Probe Response frame #p4 on the available channel #3.

And, STA#1 can receive the Probe Response frame #p4 transmitted by the AP#4 randomly selected one of the plurality of subchannels of the available channel #4 on the available channel #4, wherein the STA#1 if the correct slave channel is available #4 receives the Probe Response frame #p4, then STA#1 transmits the acknowledgement frame #a4 for the Probe Response frame #p4 on the available channel #4.

It can be understood that there is no necessary execution sequence between step S602 to step S603, step S604 to step S605, step S606 to step S607, and step S608 to step S609. For example, steps S602 to S603, steps S604 to S605, steps S606 to S607, and steps S608 to S609 may be performed in the same time period.

It can be understood that, as shown in the example of FIG. 6-B, in this embodiment, the STA can simultaneously perform frame transmission and reception on four available channels: the available channel #1, the available channel #2, the available channel #3, and the available channel #4. For example, the STA can also perform frame transmission and reception on a larger or smaller number of available channels at the same time, and the processing manner of the STA and the AP in the corresponding scenario can be deduced by analogy. In this embodiment, the STA can simultaneously perform frame transmission and reception with four APs, such as AP#1, AP#2, AP#3, and AP#4, for example, and STAs can also be more or less simultaneously. The AP performs frame transmission and reception, and the processing methods of the STA and the AP in the corresponding scenario can be deduced by analogy.

A general scenario in which a STA simultaneously performs frame transmission and reception on multiple available channels and multiple APs may be exemplified in FIG. 6-C.

Similarly, the STA can still trigger the active scanning again according to the actual situation of the system, for example, the STA can trigger the active scanning according to the number of competitive collisions of the probe response frames replied by the AP. The main process is similar to the above example process.

It can be seen that, in the technical solution of the embodiment, since the available channel can be logically divided into multiple subchannels, the AP respectively receives the multiple subchannels of the corresponding available channel after the STA sends the Probe Request frame on multiple available channels. Randomly selecting one subchannel to send a Probe Response frame corresponding to a Probe Request frame, so even if there are multiple APs in the same available channel in some scenarios Sending a Probe Response frame, if multiple APs send Probe Response frames on different subchannels of the same available channel in the same time period, it is beneficial to avoid the competitive collision of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can randomly select one subchannel to reply to the corresponding Probe Response frame in multiple subchannels of the available channel of the Probe Request frame, and the innovative mechanism is regarded as an asymmetric asymmetric probe. Response frame reply mechanism, compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism is beneficial to reduce the number of competitive collisions between APs, and is beneficial to reduce competition overhead and waste of communication resources, thereby contributing to improving the overall performance of the wireless system.

In order to facilitate a better understanding and implementation of the above technical solutions of the embodiments of the present invention, related devices for implementing the above solutions are also provided below.

Referring to FIG. 7, an embodiment of the present invention further provides an access point 700, which may include: a receiving unit 710 and a sending unit 720.

The receiving unit 710 is configured to receive, in the first available channel, a probe request frame sent by the station.

The sending unit 720 is configured to send, according to one of the plurality of subchannels of the first available channel, a probe response frame corresponding to the probe request frame.

For example, one subchannel may be equivalent to one or more resource units.

The receiving unit 710 is further configured to receive, on the first available channel, an acknowledgement frame sent by the station for the probe response frame.

Optionally, in some possible implementation manners of the present disclosure, the sending unit is specifically configured to randomly select one of the plurality of subchannels of the first available channel to send a probe response corresponding to the probe request frame. frame.

Optionally, in some possible implementation manners of the present disclosure, the probe request frame carries a subchannel division indication; the access point further includes a channel determination unit 730, configured to determine, according to the subchannel division indication The first available channel is divided into a plurality of subchannels.

Optionally, in some possible implementation manners of the disclosure, the subchannel division indication may be carried in an AP configuration information field carried in a Probe Request frame, where the AP Configuration information field may be carried in, for example, the HE-SIG-B ( The Efficient Signaling-B) field is either carried elsewhere in the Probe Request frame.

Optionally, in some possible implementation manners of the present disclosure, the access point further includes channel determining The unit 730 is configured to divide the first available channel into multiple subchannels based on protocol configuration information.

Optionally, in some possible implementation manners of the present invention, the value of the basic service unit color field carried by the probe request frame is set to a wildcard or a specified color value, where the basic service unit color field is used to indicate basic Service unit.

Optionally, in some possible implementation manners of the present disclosure, the basic service unit color field is carried in an Efficient Signaling-A field or an Efficient Signaling-B field of the high efficiency preamble of the probe request frame. .

Optionally, in some possible implementation manners of the present invention, if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point.

Optionally, in some possible implementation manners of the present invention,

Receiving, by the first available channel, an acknowledgement frame sent by the station for the probe response frame, the receiving unit is specifically configured to receive, at the first available channel, the station in the first available channel An acknowledgement frame for the probe response frame transmitted in an orthogonal frequency division multiple access mode or a multicast mode or a broadcast mode.

Optionally, in some possible implementation manners of the present disclosure, the receiving unit 710 is further configured to receive, by using the second available channel, the probe request frame sent by the station;

The sending unit 720 is further configured to send, according to one of the plurality of subchannels of the second available channel, a probe response frame corresponding to the probe request frame;

The receiving unit 710 is further configured to receive, on the second available channel, an acknowledgement frame sent by the station for the probe response frame.

It is to be understood that the function of the access point 700 in this embodiment may be specifically implemented according to the method in the foregoing method embodiment. For the specific implementation process, refer to the related description of the foregoing method embodiment, and details are not described herein again.

It can be seen that, in the solution of the embodiment of the present invention, since the available channel (such as the first available channel) can be logically divided into multiple subchannels, the AP 700 is available in the first available after receiving the Probe Request frame sent by the STA on the first available channel. One of the plurality of subchannels of the channel transmits a Probe Response frame corresponding to the Probe Request frame, so even if there are multiple APs in the same available channel in a certain scenario, Sending a Probe Response frame, if multiple APs are transmitting Probe Response frames on different subchannels of the same available channel in the same time period, it is advantageous to avoid the competitive collision of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism is beneficial to reduce the number of competitive collisions between APs, thereby reducing the competition overhead and waste of communication resources, and thus improving the overall performance of the wireless system.

Referring to FIG. 8, an embodiment of the present invention further provides an access point 800, including: a processor 810, a memory 820, and an antenna 830.

The processor 810 is configured to perform the following steps by calling an instruction or a code stored in the memory 820:

And detecting, by the antenna 830, a probe request frame sent by the station on the first available channel; transmitting, by the antenna, a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel; Receiving, by the antenna, an acknowledgement frame sent by the station for the probe response frame on the first available channel.

For example, one subchannel may be equivalent to one or more resource units.

Optionally, in some possible implementation manners of the present invention, the processor is specifically configured to randomly select one of the plurality of subchannels of the first available channel to send a probe response corresponding to the probe request frame. frame.

Optionally, in some possible implementation manners of the present disclosure, the probe request frame carries a subchannel division indication, and the processor is further configured to divide the first available channel into Multiple subchannels.

Optionally, in some possible implementation manners of the present disclosure, the access point further includes a channel determining unit, configured to divide the first available channel into multiple subchannels based on protocol configuration information.

Optionally, in some possible implementation manners of the present invention, the value of the basic service unit color field carried by the probe request frame is set to a wildcard or a specified color value, where the basic service unit color field is used to indicate basic Service unit.

Optionally, in some possible implementation manners of the present disclosure, the basic service unit color word The segment is carried in the Efficient Signaling-A field or the Efficient Signaling-B field of the high efficiency preamble of the probe request frame.

Optionally, in some possible implementation manners of the present invention, if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point.

Optionally, in some possible implementation manners of the present invention, the processor is specifically configured to: receive, by using the antenna, the orthogonal available frequency on the first available channel by using the antenna on the first available channel. An acknowledgment frame for the probe response frame transmitted in a multiple access mode or a multicast mode or a broadcast mode.

Optionally, in some possible implementation manners of the present invention, the processor is further configured to receive, by using the antenna, the probe request frame sent by the station on a second available channel; Sending, by one of the plurality of subchannels of the second available channel, a sounding response frame corresponding to the sounding request frame; receiving, by the antenna, the acknowledgement frame sent by the station for the sounding response frame on the second available channel .

It is to be understood that the function of the access point 800 in this embodiment may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, and details are not described herein again.

It can be seen that, in the solution of the embodiment of the present invention, since the available channel (such as the first available channel) can be logically divided into multiple subchannels, the AP 800 is available in the first available after receiving the Probe Request frame sent by the STA on the first available channel. One of the plurality of subchannels of the channel transmits a Probe Response frame corresponding to the Probe Request frame, so even if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, Sending a Probe Response frame on different subchannels of the same available channel is beneficial to avoid competing collisions of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism is beneficial to reduce the number of competitive collisions between APs, thereby reducing the competition overhead and waste of communication resources, and thus improving the overall performance of the wireless system.

Referring to FIG. 9, an embodiment of the present invention further provides a site 900, including:

The sending unit 910 is configured to send a probe request frame on the first available channel.

The receiving unit 920 is configured to receive, on the first available channel, a probe response frame corresponding to the probe request frame sent by the access point on one of the plurality of subchannels of the first available channel;

The sending unit 930 is further configured to send an acknowledgement frame for the probe response frame on the first available channel.

Optionally, in some possible implementation manners of the present disclosure, the detecting, by the first available channel, the probe request sent by an access point on one of the plurality of subchannels of the first available channel The probe response frame corresponding to the frame includes: a probe response frame corresponding to the probe request frame sent by the first available channel receiving access point on one of the plurality of subchannels of the first available channel.

Optionally, in some possible implementation manners of the present disclosure, the probe request frame carries a subchannel division indication, where the subchannel division indication is used to indicate that the access point is to use the first available channel. Divided into multiple subchannels. For example, one subchannel may be equivalent to one or more resource units.

Optionally, in some possible implementation manners of the present invention, the value of the basic service unit color field carried by the probe request frame is set to a wildcard or a specified color value, where the basic service unit color field is used to indicate basic Service unit.

Optionally, in some possible implementation manners of the present disclosure, the basic service unit color field is carried in an Efficient Signaling-A field or an Efficient Signaling-B field of the high efficiency preamble of the probe request frame. .

Optionally, in some possible implementation manners of the present invention, if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point.

Optionally, in some possible implementation manners of the present disclosure, the sending, by the first available channel, an acknowledgement frame for the probe response frame: the sending unit is specifically configured to be used on the first available channel An acknowledgment frame for the probe response frame transmitted in an orthogonal frequency division multiple access mode or a multicast mode or a broadcast mode.

Optionally, in some possible implementation manners of the present disclosure, the sending unit is further configured to send the probe request frame on a second available channel;

The receiving unit is further configured to receive, on the second available channel, a probe response frame corresponding to the probe request frame sent by the access point on one of the plurality of subchannels of the second available channel. The sending unit is further configured to send an acknowledgement frame for the probe response frame on the second available channel.

It can be understood that the product form of the site 900 of the embodiment may be, for example, a product form of a tablet computer, a notebook computer, a mobile internet device, a palmtop computer, a desktop computer, a mobile phone, or other user terminals.

It is to be understood that the function of the station 900 in this embodiment may be specifically implemented according to the method in the foregoing method embodiment. For the specific implementation process, reference may be made to the related description of the foregoing method embodiment, and details are not described herein again.

It can be seen that, in the solution of the embodiment of the present invention, the available channel (such as the first available channel) can be logically divided into multiple subchannels, and after the first available channel receives the Probe Request frame sent by the STA 900, the AP is in the first available channel. One of the plurality of subchannels transmits a Probe Response frame corresponding to the Probe Request frame, so even if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, Sending a Probe Response frame on different subchannels of the available channel helps to avoid competing collisions of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism is beneficial to reduce the number of competitive collisions between APs, thereby reducing the competition overhead and waste of communication resources, and thus improving the overall performance of the wireless system.

Referring to FIG. 10, an embodiment of the present invention further provides a site site 1000, including:

Processor 1010, memory 1020, and antenna 1030.

The processor 1010 is configured to: send, by using the antenna 1030, a probe request frame on a first available channel by using the instruction or the code stored in the memory 1020; Receiving, by the available channel, a probe response frame corresponding to the probe request frame sent by the access point on one of the plurality of subchannels of the first available channel; transmitting, by the antenna, on the first available channel for the The confirmation frame of the probe response frame.

Optionally, in some possible implementation manners of the present invention, the processor is configured to receive, by using the antenna, the access point on the first available channel, randomly selected among multiple subchannels of the first available channel. A probe response frame corresponding to the probe request frame transmitted by one subchannel.

For example, one subchannel may be equivalent to one or more resource units.

Optionally, in some possible implementation manners of the present disclosure, the probe request frame carries a subchannel division indication, where the subchannel division indication is used to indicate that the access point is to use the first available channel. Divided into multiple subchannels.

Optionally, in some possible implementation manners of the present invention, the value of the basic service unit color field carried by the probe request frame is set to a wildcard or a specified color value, where the basic service unit color field is used to indicate basic Service unit.

Optionally, in some possible implementation manners of the present disclosure, the basic service unit color field is carried in an Efficient Signaling-A field or an Efficient Signaling-B field of the high efficiency preamble of the probe request frame. .

Optionally, in some possible implementation manners of the present invention, if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point.

Optionally, in some possible implementation manners of the present disclosure, the processor is configured to send, by using, the antenna, in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner on the first available channel by using the antenna. The acknowledgment frame of the probe response frame.

Optionally, in some possible implementation manners of the present invention, the processor is further configured to send, by using the antenna, the probe request frame on a second available channel, and receive, by the antenna, on the second available channel. a probe response frame corresponding to the probe request frame sent by the access point on one of the plurality of subchannels of the second available channel; and the probe response frame is sent by the antenna on the second available channel Confirmation frame.

It can be understood that the product form of the site 1000 of the embodiment may be, for example, a product form of a tablet computer, a notebook computer, a mobile internet device, a palmtop computer, a desktop computer, a mobile phone, or other user terminals. It can be understood that the function of the site 1000 in this embodiment may be specifically implemented according to the method in the foregoing method embodiment, and the specific implementation process may refer to the related description of the foregoing method embodiment, where No longer.

It can be seen that, in the solution of the embodiment of the present invention, since the available channel (such as the first available channel) can be logically divided into multiple subchannels, the AP is available in the first available after receiving the Probe Request frame sent by the STA 1000 on the first available channel. One of the plurality of subchannels of the channel transmits a Probe Response frame corresponding to the Probe Request frame, so even if multiple APs in a certain scenario send a Probe Response frame on the same available channel, if multiple APs are in the same time period, Sending a Probe Response frame on different subchannels of the same available channel is beneficial to avoid competing collisions of the multiple APs. It can be seen that the foregoing solution in the embodiment introduces an innovative mechanism that the AP can reply to the corresponding Probe Response frame in one subchannel of the available channel of the Probe Request frame, and the innovative mechanism can be regarded as an asymmetric asymmetric Probe Response frame reply. Compared with the traditional symmetric Probe Response frame reply mechanism, this mechanism is beneficial to reduce the number of competitive collisions between APs, thereby reducing the competition overhead and waste of communication resources, and thus improving the overall performance of the wireless system.

Referring to FIG. 11, an embodiment of the present invention further provides a communication system, including:

Access point 1110 and site 1120. The access point 1110 can be any access point provided by the embodiment of the present invention. The site 1120 can be any one of the sites provided by the embodiment of the present invention.

The embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of any one of the active scanning processing methods described in the foregoing method embodiments.

In the above embodiments, the descriptions of the various embodiments are different, and the details that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence. Because certain steps may be performed in other sequences or concurrently in accordance with the present invention. In addition, those skilled in the art should also understand that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the several embodiments provided herein, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the device embodiments described above are merely illustrative, such as the above single The division of elements is only a logical function division. In actual implementation, there may be another division manner. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical or otherwise.

The units described above as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The above-described integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. The instructions include a plurality of instructions for causing a computer device (which may be a personal computer, server or network device, etc., and in particular a processor in a computer device) to perform all or part of the steps of the above-described methods of various embodiments of the present invention. The foregoing storage medium may include: a U disk, a mobile hard disk, a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM), and the like. The medium of the code.

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims (52)

An active scanning processing method, comprising: The access point receives the probe request frame sent by the station at the first available channel; The access point sends a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel; The access point receives an acknowledgement frame sent by the station for the probe response frame on the first available channel. The method according to claim 1, wherein the detecting, by the access point, the probe response frame corresponding to the probe request frame sent by one of the plurality of subchannels of the first available channel comprises: The in-point randomly selects one of the plurality of subchannels of the first available channel to transmit a probe response frame corresponding to the probe request frame. The method according to claim 1 or 2, wherein the probe request frame carries a subchannel division indication; Before the access point sends the probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel, the method further includes: the access point is based on the child The channel division indication divides the first available channel into a plurality of subchannels. The method according to claim 1 or 2, wherein the access point before the one of the plurality of subchannels of the first available channel transmits the probe response frame corresponding to the probe request frame, The method further includes the access point dividing the first available channel into a plurality of subchannels based on protocol configuration information. The method according to any one of claims 1 to 4, wherein the value of the basic service unit color field carried in the probe request frame is set to a wildcard or a specified color value, and the basic service unit color field is used. Mark the basic service unit. The method according to claim 5, wherein the basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of the high efficiency preamble of the sounding request frame. The method according to claim 5 or 6, wherein if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is Specifies the access point corresponding to the color value. The method according to any one of claims 1 to 7, wherein the receiving, by the access point, the acknowledgement frame sent by the station to the probe response frame on the first available channel comprises: the access And determining, at the first available channel, an acknowledgement frame for the probe response frame sent by the station on the first available channel in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner. A method according to any one of claims 1 to 8, wherein The method further includes: Receiving, by the access point, the probe request frame sent by the station on a second available channel; Sending, by the access point, a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the second available channel; The access point receives an acknowledgement frame sent by the station for the probe response frame on the second available channel. An active scanning processing method, comprising: The station sends a probe request frame on the first available channel; The station receives, on the first available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the first available channel; The station transmits an acknowledgement frame for the probe response frame on the first available channel. The method according to claim 10, wherein said detecting request frame transmitted by said first available channel receiving access point on one of said plurality of subchannels of said first available channel corresponds to said probe request frame The probe response frame includes: a probe response frame corresponding to the probe request frame sent by the first available channel receiving access point on a randomly selected one of the plurality of subchannels of the first available channel. The method according to claim 10 or 11, wherein the probe request frame carries a subchannel division indication, wherein the subchannel division indication is used to indicate that the access point is to use the first available channel Divided into multiple subchannels. The method according to any one of claims 10 to 12, wherein the value of the basic service unit color field carried by the probe request frame is set to a wildcard or a specified color value, and the basic service unit color field is used for Mark the basic service unit. The method according to claim 13, wherein the basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of the high efficiency preamble of the sounding request frame. The method according to claim 13 or 14, wherein if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point. The method according to any one of claims 10 to 15, wherein the station transmits an acknowledgement frame for the probe response frame on the first available channel, including: the site is available at the first An acknowledgement frame for the probe response frame transmitted in the orthogonal frequency division multiple access mode or the multicast mode or the broadcast mode on the channel. A method according to any one of claims 10 to 16, wherein The method further includes: Sending, by the station, the probe request frame on a second available channel; the station receiving, at the second available channel, the probe sent by an access point on one of a plurality of subchannels of the second available channel A probe response frame corresponding to the request frame; the station transmitting an acknowledgement frame for the probe response frame on the second available channel. An access point, comprising: a receiving unit, configured to receive, by the first available channel, a probe request frame sent by the station; a sending unit, configured to send, according to one of the plurality of subchannels of the first available channel, a probe response frame corresponding to the probe request frame; The receiving unit is further configured to receive, on the first available channel, an acknowledgement frame sent by the station for the probe response frame. The access point according to claim 18, wherein the sending unit is configured to randomly select one of the plurality of subchannels of the first available channel to send a probe response corresponding to the probe request frame. frame. The access point according to claim 18 or 19, wherein the probe request frame carries a subchannel division indication; the access point further comprises a channel determination unit, configured to indicate based on the subchannel division indication The first available channel is divided into a plurality of subchannels. An access point according to claim 18 or 19, characterized in that The access point further includes a channel determining unit configured to divide the first available channel into a plurality of subchannels based on protocol configuration information. An access point according to any one of claims 18 to 21, characterized in that The value of the basic service unit color field carried in the probe request frame is set to a wildcard or a specified color value, and the basic service unit color field is used to indicate a basic service unit. The access point according to claim 22, wherein said basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of a high efficiency preamble of said sounding request frame . The access point according to claim 22 or 23, wherein if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is The access point corresponding to the color value. An access point according to any one of claims 18 to 24, characterized in that Receiving, by the first available channel, an acknowledgement frame sent by the station for the probe response frame, the receiving unit is specifically configured to receive, at the first available channel, the station in the first available channel An acknowledgement frame for the probe response frame transmitted in an orthogonal frequency division multiple access mode or a multicast mode or a broadcast mode. The access point according to any one of claims 18 to 25, wherein the receiving unit is further configured to receive the probe request frame sent by the station on a second available channel; The sending unit is configured to send, according to one of the plurality of subchannels of the second available channel, a probe response frame corresponding to the probe request frame; The receiving unit is further configured to receive, on the second available channel, an acknowledgement frame sent by the station for the probe response frame. A site characterized by comprising: a sending unit, configured to send a probe request frame on the first available channel; a receiving unit, configured to receive, on the first available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the first available channel; The sending unit is further configured to: send, on the first available channel, the frame for the probe response Frame recognition. The station according to claim 27, wherein said probe request frame transmitted by said first available channel receiving access point on one of said plurality of subchannels of said first available channel corresponds to said probe request frame The probe response frame includes: a probe response frame corresponding to the probe request frame sent by the first available channel receiving access point on a randomly selected one of the plurality of subchannels of the first available channel. The station according to claim 27 or 28, wherein the probe request frame carries a subchannel division indication, wherein the subchannel division indication is used to indicate that the access point will use the first available channel Divided into multiple subchannels. The station according to any one of claims 27 to 29, wherein the value of the basic service unit color field carried in the probe request frame is set to a wildcard or a specified color value, and the basic service unit color field is used. Mark the basic service unit. The station according to claim 30, wherein the basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of the high efficiency preamble of the sounding request frame. The station according to claim 30 or 31, wherein if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is the specified color value. Corresponding access point. The station according to any one of claims 27 to 32, wherein said aspect of transmitting an acknowledgement frame for said probe response frame on said first available channel: transmitting unit is specifically for said first An acknowledgment frame for the probe response frame transmitted on the available channel in an orthogonal frequency division multiple access manner or a multicast manner or a broadcast manner. The station according to any one of claims 27 to 33, wherein the sending unit is further configured to send the probe request frame on a second available channel; The receiving unit is further configured to: receive, on the second available channel, a probe response frame corresponding to the probe request frame sent by an access point on one of the plurality of subchannels of the second available channel; The sending unit is further configured to send, on the second available channel, the frame for the probe response Frame recognition. An access point, comprising: Processor, memory and antenna; The processor is configured to perform the following steps by calling an instruction or code stored in the memory: And detecting, by the antenna, a probe request frame sent by the station on the first available channel; transmitting, by the antenna, a probe response frame corresponding to the probe request frame on one of the plurality of subchannels of the first available channel; The antenna receives an acknowledgement frame sent by the station for the probe response frame on the first available channel. The access point according to claim 35, wherein the processor is specifically configured to randomly select one of the plurality of subchannels of the first available channel to send a probe response corresponding to the probe request frame. frame. The access point according to claim 35 or 36, wherein the probe request frame carries a subchannel division indication; the processor is further configured to: according to the subchannel division indication, the first available channel Divided into multiple subchannels. An access point according to claim 35 or 36, characterized in that The access point further includes a channel determining unit configured to divide the first available channel into a plurality of subchannels based on protocol configuration information. The access point according to any one of claims 35 to 38, wherein the value of the basic service unit color field carried in the probe request frame is set to a wildcard or a specified color value, the basic service unit color The field is used to indicate the basic service unit. The access point according to claim 39, wherein said basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of a high efficiency preamble of said sounding request frame . The access point according to claim 39 or 40, wherein if the value of the basic service unit color field of the probe request frame is set to a specified color value, the access point is The access point corresponding to the color value. An access point according to any one of claims 35 to 41, characterized in that The processor is specifically configured to receive, by using the antenna, the first available channel on the first available channel, where the station is sent by using an orthogonal frequency division multiple access method, a multicast mode, or a broadcast manner on the first available channel. An acknowledgement frame of the probe response frame. An access point according to any one of claims 35 to 42, wherein The processor is further configured to receive, by using the antenna, the probe request frame sent by the station on a second available channel; and send, by the antenna, one of the plurality of subchannels of the second available channel Determining a response response frame corresponding to the probe request frame; receiving, by the antenna, the acknowledgement frame sent by the station for the probe response frame on the second available channel. A site characterized by comprising: Processor, memory and antenna; Wherein, by invoking an instruction or code stored in the memory, the processor is configured to perform: transmitting, by the antenna, a probe request frame on a first available channel; receiving, by the antenna, on the first available channel And a sounding response frame corresponding to the sounding request frame sent by one of the plurality of subchannels of the first available channel; and transmitting, by the antenna, the probe response frame on the first available channel Confirm the frame. The station according to claim 44, wherein said processor is configured to receive, by said antenna, a randomly selected one of a plurality of subchannels of said first available channel of said access point on said first available channel The probe response frame corresponding to the probe request frame sent by the channel. The station according to claim 44 or 45, wherein the probe request frame carries a subchannel division indication, wherein the subchannel division indication is used to indicate that the access point is to use the first available channel Divided into multiple subchannels. The station according to any one of claims 44 to 46, wherein the value of the basic service unit color field carried in the probe request frame is set to a wildcard or a specified color value, and the basic service unit color field is used. Mark the basic service unit. The station according to claim 47, wherein said basic service unit color field is carried in an efficient signaling-A field or an efficient signaling-B field of a high efficiency preamble of said sounding request frame. A station according to claim 47 or 48, wherein said probe request frame The value of the basic service unit color field is set to a specified color value, and the access point is an access point corresponding to the specified color value. The station according to any one of claims 44 to 49, wherein the processor is configured to use an orthogonal frequency division multiple access method or a multicast mode or a broadcast mode on the first available channel by using the antenna. An acknowledgment frame sent for the probe response frame. The station according to any one of claims 44 to 50, wherein the processor is further configured to send the probe request frame on a second available channel by using the antenna; Receiving, by the available channel, a sounding response frame corresponding to the sounding request frame sent by the access point on one of the plurality of subchannels of the second available channel; transmitting, by the antenna, the second available channel for the The confirmation frame of the probe response frame. A communication system, comprising: The access point according to any one of claims 18 to 26 or 35 to 43, further comprising the station according to any one of claims 27 to 34 or 44 to 51.

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