WO2018120900A1 - Network access method and device, and system - Google Patents

Abstract

A network access method comprises: a station transmitting, on channels in a first channel set, one or more wake-up messages, the wake-up messages being used to wake up one or more access points, the wake-up messages carrying indication information, the indication information indicating a need of the station to execute network access; the station receiving information returned by the access points according to the indication information; and the station executing network access according to the returned information.

Description

Network access method, device and system Technical field

The present application relates to, but is not limited to, the field of wireless communication technologies, and in particular, to a network access method, apparatus, and system.

Background technique

At present, the Internet of Things industry is developing rapidly. A large number of IoT devices are connected to the network and connected to each other through wired or wireless means, including intelligent transportation, environmental protection, government work, public safety, safe home, intelligent fire protection, industrial monitoring, and elderly care. Personal health, water monitoring, food traceability and many other areas. The number of IoT devices involved in IoT applications is huge and can be called massive terminals. Most of these terminals work on battery power. In most application scenarios, such as water quality monitoring, environmental monitoring and industrial monitoring, the installation location of the equipment is not easy to detect and repair at any time, and to replace the battery; in other scenarios, such as intelligent transportation, electricity meter reading, service providers It is also hoped that once the device is installed, it can be replaced for several months or even years without replacing the battery, which requires the IoT device to have a high-performance power-saving mechanism.

Among the various power-saving mechanisms, one of the methods is to add a power-saving module to the IoT device with wireless communication capability. The working principle of the power-saving module is as follows: When the power-saving module is turned on, the device can shut down other modules. For example, the sensor module, the microprocessor module, the memory module, the wireless communication module, etc., only retains the operation of the power saving module, and the working state of the device is hereinafter referred to as the power saving state. The power-saving module consumes very little power during operation, generally at the microwatt level. The power-saving module needs to monitor whether there is a wake-up signal sent to itself. Once received, it triggers other modules to work according to the request of the wake-up signal, such as turning on the micro-processing module, turning on the wireless communication module, etc., hereinafter referred to as a wake-up process. .

The above-mentioned working methods are described by taking the common devices in the wireless network: an Access Point (AP) and a non-AP STA (STA). An AP establishes a Basic Service Set (BSS). The STA is a wireless device associated with the AP. If the STA adds a power-saving module to the STA, the STA can retain only the power-saving module if there is no service. Work to receive wake-up signals. After a while, the AP needs to send to the STA. After sending the downlink data, the AP first sends a wake-up signal to the STA. The STA's power-saving module receives the wake-up signal and confirms that the wake-up signal is sent to itself. According to the content of the wake-up signal, other modules are enabled to perform related operations, such as receiving. Downstream data from the AP. In another application scenario, the AP can also add a power-saving module. When the STA associated with the AP does not provide uplink data to the AP, the AP can only save the power-saving module. If a STA needs to send data to the AP, The wake-up signal is first sent to the AP, and the AP receives the wake-up signal, turns on other modules, and performs related operations, such as receiving uplink data from the STA.

When a STA wants to access the network, it first needs to perform network scanning. Currently, there are two types of network scanning methods: passive scanning and active scanning. Passive scanning means that the STA listens on each channel for a certain length of time according to the channel list to receive the Beacon frame and discover the BSS existing on the channel. Active scanning refers to a Probe Request frame that the STA actively sends a broadcast address on each channel according to the channel list, which carries the SSID (Service Set Identifier), the SSID list, or the BSSID (which is desired to be accessed). The basic service set identifier) collects the Probe Response frame received on each channel to discover the BSS existing on the channel.

When the AP enters the power-saving state, if a STA wants to access the AP, the scanning process starts, but when the AP is in the power-saving state, only the power-saving module is in the listening state, so when the STA performs active or passive scanning on the channel, The Beacon frame or the Probe Response frame from the AP may not be received within the length of the system. The STA may jump to other channels to scan the target AP, thus extending the duration of the STA accessing the network.

Summary of invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

In a first aspect, an embodiment of the present application provides a network access method, including:

The station sends one or more wake-up messages on a channel in the first set of channels, wherein the wake-up message is used to wake up one or more access points, the wake-up message carrying indication information, the indication information is used for Instructing the site to perform network access;

The station receives information returned by the access point according to the indication information;

The station performs network access based on the returned information.

In a second aspect, the embodiment of the present application provides a network access method, including:

The access point receives the awake message sent by the station on the channel in the first channel set, where the awake message carries the indication information, where the indication information is used to indicate that the site needs to perform network access;

When the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, the information is returned to the site according to the indication information in the wakeup message.

In a third aspect, an embodiment of the present application provides a network access apparatus, including:

a first sending module, configured to send one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries indication information, The indication information is used to indicate that the site needs to perform network access;

a first receiving module, configured to receive information returned by the access point according to the indication information;

And a processing module configured to perform network access according to the returned information.

In a fourth aspect, an embodiment of the present application provides a site, including the network access device of the foregoing third aspect.

In a fifth aspect, the embodiment of the present application provides a network access apparatus, including:

a second receiving module, configured to receive, by using a channel in the first channel set, a wake-up message sent by the station, where the wake-up message carries indication information, where the indication information is used to indicate that the site needs to perform network access;

The second sending module is configured to: when it is determined that the wakeup identifier in the wakeup message matches the self wakeup identifier, return information to the site according to the indication information in the wakeup message.

In a sixth aspect, an embodiment of the present application provides an access point, including the network access apparatus of the foregoing fifth aspect.

In a seventh aspect, the embodiment of the present application provides a network access system, including: a site and an access point;

The station includes: a first sending module configured to send one or more wake-up messages on a channel in the first channel set, wherein the wake-up message is used to wake up one or more access points, in the wake-up message Carrying indication information, the indication information is used to indicate that the site needs to perform network connection The first receiving module is configured to receive information returned by the access point according to the indication information, and the processing module is configured to perform network access according to the returned information;

The access point includes: a second receiving module, configured to receive, on a channel in the first channel set, a wake-up message sent by the first sending module of the station, where the wake-up message carries indication information, where the indication information is used Instructing the station to perform network access; the second sending module is configured to: when it is determined that the wake-up identifier and the self-awake identifier in the wake-up message match, return information to the first receiving of the station according to the indication information in the wake-up message Module.

In an eighth aspect, the embodiment of the present application provides a network access method, including:

The station sends one or more wake-up messages on a channel in the first set of channels, wherein the wake-up message is used to wake up one or more access points, the wake-up message carrying indication information, the indication information is used for Instructing the site to perform network access;

The access point receives the wake-up message sent by the station on the channel in the first channel set;

When the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, the information is returned to the site according to the indication information in the wakeup message;

The station receives information returned by the access point according to the indication information;

The station performs network access based on the returned information.

In addition, the embodiment of the present application further provides a computer readable medium, where a network access program is stored, and when the network access program is executed by the processor, the network access method provided by the first aspect or the second aspect is implemented. step.

The above solution realizes that when the wireless communication access point is in the power saving state, when the station needs to access the network, the waking message is sent to the access point, and the network access is performed according to the information fed back by the access point, so that the station can be quickly Discovering the network existing on the channel and performing network access effectively reduces the network access delay caused by the access point being in a power-saving state.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a flowchart of a network access method according to an embodiment of the present application;

2 is a flowchart of a network access method according to an embodiment of the present application;

FIG. 3 is a schematic structural diagram of a network access apparatus according to an embodiment of the present application;

4 is a schematic structural diagram of a network access apparatus according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a network access system according to an embodiment of the present application;

FIG. 6 is a flowchart of a network access method according to an embodiment of the present application;

7 is a schematic diagram of a working channel bandwidth of an AP in an application example of the present application;

FIG. 8 is a schematic structural diagram of a power saving module configured in an AP in an application example of the present application.

Detailed

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a flowchart of a network access method according to an embodiment of the present application. As shown in FIG. 1 , the network access method provided in this embodiment is applied to a station, and a method for performing network access by a station when a wireless communication access point is in a power saving state is given. The method includes the following steps:

Step 101: The station sends one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries indication information, the indication The information is used to indicate that the site needs to perform network access;

Step 102: The station receives information returned by the access point according to the indication information.

Step 103: The station performs network access according to the returned information.

The first channel set may refer to a channel set in which the one or more access points monitor wake-up messages.

The information returned by the access point may be a beacon frame or a probe response frame.

Exemplarily, the receiving address of the wake-up message may be a unicast address, or a multicast address, or a broadcast address.

Exemplarily, the wakeup identifier of the one or more access points may be carried in the wakeup message.

Exemplarily, the wakeup identifier may be at least one of: an SSID of an access point, an operationd value of the SSID, a BSSID of the access point, a calculated value of the BSSID, a wildcard SSID, Wildcard BSSID.

Exemplarily, the value obtained by the operation of the SSID may be: a partial byte of the SSID or an SSID obtained by a compression algorithm; the calculated value of the BSSID may be: a partial byte of the BSSID, or a compression algorithm The resulting BSSID.

In this embodiment, in step 101, sending one or more wake-up messages on a channel in the first channel set may include: sequentially transmitting one or more wake-up messages on one channel in the first channel set, or One or more wake-up messages are sequentially transmitted on each of the plurality of channels in the first set of channels, or a plurality of wake-up messages are transmitted in parallel on each of the plurality of channels in the first set of channels.

As an exemplary implementation manner of this embodiment, the indication information in step 101 may indicate that the scanning type performed by the site is active scanning or passive scanning.

As another exemplary embodiment of this embodiment, the indication information in step 101 may indicate that the type of the wake-up message is a wake-up message for waking up an access point and performing network access, and the site will One of the following scan types is performed by default: active scan, passive scan.

Embodiments of passive scanning and active scanning will be described below through various embodiments.

Passive scan implementation mode 1:

In this embodiment, the site scan type is passive scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the site needs to perform network access;

In step 102, the station receives a beacon frame on a channel in the second channel set;

Illustratively, the second set of channels refers to a set of working channels for which the one or more access points perform data and signaling;

As an exemplary implementation manner of this embodiment, the receiving, by the station, a beacon frame on a channel in the second channel set may be: for each channel, listening for a first predetermined duration, and receiving at a first predetermined duration The received beacon frame, when the first predetermined duration arrives, jumps to the next channel until it jumps to the last channel of the second channel set;

In step 103, the station performs network access according to the returned information, and may include:

After the site obtains the beacon frame, the access point is selected to perform network access.

In this embodiment, when the station scan type is passive scanning, the station scans one or more channels of the second channel set one by one, all channels are scanned, the scan result is processed, if the access point that wants to access is found, or The access point suitable for access performs subsequent access operations.

Passive Scan Implementation 2:

In this embodiment, the site scan type is passive scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the station needs to perform network access, and the wakeup message further includes a designated channel in the second channel set.

In step 102, the station listens to the second predetermined duration on the designated channel, and receives a response frame that is sent by the access point to the user within the second predetermined duration; the response frame carries the connection a working channel of an ingress; the station receives a beacon frame on the working channel;

In step 103, after the station acquires the beacon frame, the access point is selected to perform network access.

Illustratively, the station receiving a beacon frame on the working channel may include: listening to a first predetermined duration for each channel of the working channel, and receiving a beacon frame received within a first predetermined duration When the first predetermined duration arrives, it jumps to the next channel until it jumps to the last channel of the working channel.

In this embodiment, when the site scan type is passive scanning, the access point sends a working channel notification on the site designated channel, and the station then performs passive scanning on one or more working channels. After all the channels are scanned, the scanning result is processed. If the access point that you want to access or the access point that is suitable for access is found, the subsequent access operation is performed. In this embodiment, the station carries a designated channel while waking up the access point, and the access point wakes up and responds to the response frame on the designated channel, indicating that it has woken up and carrying its own working channel in the response frame. In order to achieve the purpose of quickly notifying the station of the working channel of the access point, thereby further reducing the number of station scanning channels.

Illustratively, the response frame carries, in addition to the working channel of the access point, necessary information for performing network access; the station according to at least one of necessary information content and signal reception strength of the response frame Performing an access point selection and transmitting a radio frame to the selected one or more access points on the designated channel; the station receiving a message on a working channel of the selected one or more access points Frame the frame and perform subsequent access operations. When the wireless frame sent by the station to itself is not received, Or when the wireless frame is received but the receiving address is not itself, the awakened access point returns to the power saving state.

In this embodiment, the access point further carries the necessary information of the network access in the response frame, and the site can select a plurality of suitable access points in this step, and then the site works at the access point that is deemed to be suitable. Network scanning is performed on the channel, the target access point is selected, and network access is completed, which further reduces the number of site scanning channels. The unselected access point can return to the power saving state in time, further reducing the power consumption of the access point.

Passive scan implementation three:

In this embodiment, the site scan type is passive scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the site needs to perform network access;

In step 102, the station monitors a second predetermined duration on a predefined channel, and receives a response frame sent by the access point; the response frame carries a working channel of the access point; the predefined channel is the site Transmitting a channel in a first channel set of the wake-up message, or a channel in a second channel set; the station receiving a beacon frame on the working channel;

In step 103, after the station acquires the beacon frame, the access point is selected to perform network access.

Illustratively, the station receiving a beacon frame on the working channel may include: listening to a first predetermined duration for each channel of the working channel, and receiving a beacon frame received within a first predetermined duration When the first predetermined duration arrives, it jumps to the next channel until it jumps to the last channel of the working channel.

In this embodiment, when the station scan type is passive scanning, the access point sends the working channel notification on a predefined channel, and the station then performs passive scanning on the working channel notified by the access point, and all channels are scanned. The scan result is processed, and if an access point that is desired to be accessed, or an access point suitable for access is found, a subsequent access operation is performed. In this embodiment, the station can directly listen to the wake-up message on the predefined channel and the response frame of the working channel carrying the access point, thereby avoiding carrying the channel information in the wake-up message and reducing the signaling overhead.

Illustratively, the response frame carries, in addition to the working channel of the access point, necessary information for performing network access; the station according to at least one of necessary information content and signal reception strength of the response frame. Performing an access point selection and transmitting a radio frame to the selected one or more access points on the designated channel; the station is working at the selected one or more access points A beacon frame is received on the channel to perform subsequent access operations. When the wireless frame sent by the station to itself is not received, or the wireless frame is received but the receiving address is not itself, the awakened access point returns to the power saving state.

In this embodiment, the access point further carries the necessary information of the network access in the response frame, and the site can select a plurality of suitable access points in this step, and then the site works at the access point that is deemed to be suitable. Network scanning is performed on the channel, the target access point is selected, and network access is completed, which further reduces the number of site scanning channels. The unselected access point can return to the power saving state in time, further reducing the power consumption of the access point.

Active scanning implementation method 1:

In this embodiment, the site scanning type is active scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the site needs to perform network access;

In step 102, the station sends a probe request frame on each channel in the second channel set, or a probe request frame that does not include a MAC (Medium Access Control) layer load, and is not received within the third predetermined duration. Any response frame, jump to the next channel; if at least one response frame is received, the current channel listens to the first predetermined time period, receives the probe response frame sent by the access point, and jumps to the next channel until the jump To the last channel of the second channel set;

In step 103, after obtaining the probe response frame, the station selects the access point to perform network access.

In this embodiment, when the station scan type is active scanning, the station scans one or more channels of the second channel set one by one, all channels are scanned, the scan result is processed, if the access point that wants to access is found, or The access point suitable for access performs subsequent access operations.

Active scanning implementation method 2:

In this embodiment, the site scanning type is active scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the station needs to perform network access, and the wake-up message carries a designated channel in the second channel set.

In step 102, the station listens to the second predetermined duration on the designated channel, and receives a response frame sent by the access point received within the second predetermined duration; the response frame carries the working channel of the access point;

The station sends a probe request frame on each channel in the working channel, or a probe request frame that does not include a MAC layer load, and does not receive any response frame within a third predetermined duration, and jumps to the next a channel; if at least one response frame is received, the current channel is monitored to reach a first predetermined duration, and the probe response frame sent by the access point is received, and the next channel is jumped to the last channel of the working channel;

In step 103, after obtaining the probe response frame, the station selects the access point to perform network access.

In this embodiment, when the site scan type is active scanning, the access point sends a working channel notification on the site designated channel, and the station then performs active scanning on one or more working channels. After all the channels are scanned, the scanning result is processed. If the access point that you want to access or the access point that is suitable for access is found, the subsequent access operation is performed. In this embodiment, the station carries a designated channel while waking up the access point, and the access point wakes up and responds to the response frame on the designated channel, indicating that it has woken up and carrying its own working channel in the response frame. In order to achieve the purpose of quickly notifying the station of the working channel of the access point, thereby further reducing the number of station scanning channels.

Illustratively, the response frame carries, in addition to the working channel of the access point, necessary information for performing network access; the station according to at least one of necessary information content and signal reception strength of the response frame. Performing an access point selection and transmitting a radio frame to the selected one or more access points on a designated channel; the station transmitting a probe request on a working channel of the selected one or more access points Frame, perform subsequent access operations. When the wireless frame sent by the station to itself is not received, or the wireless frame is received but the receiving address is not itself, the awake access point returns to the power saving state.

In this embodiment, the access point further carries the necessary information of the network access in the response frame, and the site can select a plurality of suitable access points in this step, and then the site works at the access point that is deemed to be suitable. Network scanning is performed on the channel, the target access point is selected, and network access is completed, which further reduces the number of site scanning channels. The unselected access point can return to the power saving state in time, further reducing the power consumption of the access point.

Active Scan Implementation Mode 3:

In this embodiment, the site scanning type is active scanning, and the following embodiments are provided in this embodiment:

In step 101, the indication information indicates that the site needs to perform network access;

In step 102, the station monitors a second predetermined duration on a predefined channel, and receives a response frame sent by the access point; the response frame carries a working channel of the access point; the predefined channel is Sending, by the station, a channel in a first channel set of a wake-up message, or a channel in a second channel set;

The station sends a probe request frame on each channel of the working channel, or a probe request frame that does not include a MAC layer load, and does not receive any response frame within a third predetermined duration, and jumps to the next channel; Receiving at least one response frame, when the current channel is monitored to a first predetermined duration, receiving a probe response frame sent by the access point, and jumping to the next channel until jumping to the last channel of the working channel;

Step 103: After obtaining the probe response frame, the station selects the access point to perform network access.

In this embodiment, when the station scan type is active scanning, the access point sends the working channel notification on a predefined channel, and the station then performs active scanning on the working channel notified by the access point, and all channels are scanned. The scan result is processed, and if an access point that is desired to be accessed, or an access point suitable for access is found, a subsequent access operation is performed. In this embodiment, the station can directly listen to the wake-up message on the predefined channel and the response frame of the working channel carrying the access point, thereby avoiding carrying the channel information in the wake-up message and reducing the signaling overhead.

Illustratively, the response frame carries, in addition to the working channel of the access point, necessary information for performing network access; the station according to at least one of necessary information content and signal reception strength of the response frame. Performing an access point selection and transmitting a radio frame to the selected one or more access points on a designated channel; the station transmitting a probe request on a working channel of the selected one or more access points Frame, perform subsequent access operations. When the wireless frame sent by the station to itself is not received, or the wireless frame is received but the receiving address is not itself, the awake access point returns to the power saving state.

In this embodiment, the access point further carries the necessary information of the network access in the response frame, and the site can select a plurality of suitable access points in this step, and then the site works at the access point that is deemed to be suitable. Network scanning is performed on the channel, the target access point is selected, and network access is completed, which further reduces the number of site scanning channels. The unselected access point can return to the power saving state in time, further reducing the power consumption of the access point.

In the above various embodiments, the values of the first predetermined duration, the second predetermined duration, and the third predetermined duration may be the same or different.

In the above various embodiments, the first channel set and the second channel set may be located in the same or different frequency bands.

FIG. 2 is a flowchart of another network access method according to an embodiment of the present application. As shown in FIG. 2, the network access method provided in this embodiment is applied to an access point, and a method for performing network access by a station when a wireless communication access point is in a power saving state is given. The method includes the following steps:

Step 201: The access point receives the awake message sent by the station on the channel in the first channel set, where the awake message carries the indication information, where the indication information is used to indicate that the site needs to perform network access.

Step 202: When the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, the information is returned to the site according to the indication information in the wakeup message.

The matching of the wakeup identifier and the self wakeup identifier may refer to:

When the wake-up identifier includes one or more combinations of the following identifiers, the same as the self-awake identifier: the SSID of the access point, the value obtained by the operation of the SSID, the BSSID of the access point, the value obtained by the BSSID, and the wildcard SSID, wildcard BSSID;

The value obtained by the operation of the SSID includes: a partial byte of the SSID or an SSID obtained by a compression algorithm; and the calculated value of the BSSID includes: a partial byte of the BSSID, or a BSSID obtained by a compression algorithm.

Exemplarily, the indication information in the wakeup message may indicate that the scan type performed by the site is an active scan or a passive scan.

Exemplarily, the indication information in the wake-up message may indicate that the type of the wake-up message is a wake-up message for waking up an access point and performing network access, and the station will perform one of the following scan types by default: Active scanning, passive scanning.

In an exemplary embodiment, in step 201, the indication information indicates that the station performs network access;

In step 202, the access point sends a beacon frame on its own working channel. If the probe request frame sent by the station is received, or the probe request frame does not include the MAC layer load, the access point sends a probe response to the station. frame.

In an exemplary embodiment, in step 201, the indication information indicates that the station performs network access, and the wake-up message carries a designated channel in the second channel set;

In step 202, the access point sends a response frame to the station on the designated channel.

The response frame carries a working channel of the access point;

The access point sends a beacon frame on the working channel, and if receiving a probe request frame sent by the station or a probe request frame that does not include a MAC layer load, the access point sends a probe response frame to the station. .

In the exemplary embodiment, the method in this embodiment may further include:

Step 203: After the access point switches to the working channel, the frame from the station is not received within the fourth predetermined duration, and the access point returns to the power saving state.

In this exemplary embodiment, in step 202, the access point sends a response frame to the station on the designated channel; the response frame carries the working channel of the access point, and also carries the site to perform network access. Necessary information;

Receiving, by the access point, the radio frame sent by the station after sending the response frame, where the access point sends a beacon frame on the working channel; if the probe request frame is received, or does not include a MAC layer A probe request frame of the load, the access point transmitting a probe response frame to the station.

The access point does not receive the radio frame sent by the station after transmitting the response frame, or receives the radio frame sent by the station to itself, and returns to the power saving state when the receiving address is not itself.

In an exemplary embodiment, in step 201, the indication information indicates that the site performs passive scanning;

In step 202, the access point sends a response frame to the station on a predefined channel, where the response frame carries the working channel of the access point; the predefined channel is that the station sends a wake-up message. a channel in the first channel set, or a channel in the second channel set;

The access point sends a beacon frame on the working channel; if a probe request frame is received, or a probe request frame that does not include a MAC layer load, the access point sends a probe response frame to the station.

In this exemplary embodiment, the method may further include:

Step 203: After the access point switches to the working channel, the frame from the station is not received within the fourth predetermined duration, and the access point returns to the power saving state.

In this exemplary embodiment, in step 202, the access point sends a response frame to the station on the designated channel; the response frame carries a working channel of the access point, and also carries a site execution network connection. Necessary information entered; the access point receives the response from the station after sending the response frame a radio frame, the access point transmitting a beacon frame on the working channel, and if receiving a probe request frame or a probe request frame that does not include a MAC layer load, the access point sends a probe response to the station frame.

The access point does not receive the radio frame sent by the station after transmitting the response frame, or receives the radio frame sent by the station to itself, and returns to the power saving state when the receiving address is not itself.

FIG. 3 is a schematic structural diagram of a network access apparatus according to an embodiment of the present application. As shown in FIG. 3, the network access device provided in this embodiment is applied to a site, and when the wireless communication access point is in a power-saving state, the site performs a network access operation. The network access device includes:

The first sending module 301 is configured to send one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries the indication information The indication information is used to indicate that the site needs to perform network access;

The first receiving module 302 is configured to receive information returned by the access point according to the indication information;

The processing module 303 is configured to perform network access according to the returned information.

Illustratively, the first sending module 301 can be configured to send one or more wake-up messages on a channel in the first set of channels by transmitting one or more on a set of channels on which the access point listens for wake-up messages Multiple wakeup messages.

Exemplarily, the first sending module 301 can be configured to send one or more wake-up messages by sending a wake-up message whose receiving address is a unicast address or a multicast or broadcast address.

Exemplarily, the first sending module 301 can be configured to send one or more wake-up messages by sending a wake-up message carrying a wake-up identifier of the one or more access points.

Exemplarily, the first sending module 301 can be configured to send a wake-up message carrying the wake-up identifier of the one or more access points by sending a wake-up message carrying a wake-up identifier of at least one of the following identifiers:

SSID of the access point, the value obtained by the operation of the SSID, the BSSID of the access point, the value obtained by the BSSID, the wildcard SSID, the wildcard BSSID;

The value obtained by the operation of the SSID is: a partial byte of the SSID, or an SSID obtained by a compression algorithm, and the calculated value of the BSSID is: a partial byte of the BSSID, or a BSSID obtained by a compression algorithm.

Illustratively, the first transmitting module 301 can be configured to transmit one or more wake-up messages on a channel in the first set of channels by sequentially transmitting one or more wake-up messages on one channel, or at most One or more wake-up messages are sequentially transmitted on each channel of the channel, or multiple wake-up messages are transmitted in parallel on multiple channels.

Illustratively, the indication information carried in the awake message sent by the first sending module 301 may indicate that the scanning type performed by the station is active scanning or passive scanning; or the indication information may indicate the waking The type of message is a wake-up message for waking up the access point and performing network access, and the station will by default perform one of the following scan types: active scanning, passive scanning.

Illustratively, the first receiving module 302 can be configured to receive a beacon frame on a channel in the second set of channels;

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.

Illustratively, the first receiving module 302 can be configured to receive beacon frames on channels in the second set of channels by: working channels for data and signaling at the one or more access points A beacon frame is received on a channel in the set.

Illustratively, the first receiving module 302 can be configured to receive a beacon frame on a channel in the second channel set by: for each channel, listening for a first predetermined duration, and receiving the first predetermined duration The arriving beacon frame, when the first predetermined duration arrives, jumps to the next channel until it jumps to the last channel of the second channel set.

Illustratively, when the awake message sent by the first sending module 301 further includes a designated channel in the second channel set, the first receiving module 302 may be configured to receive the access point according to the indication information by: Returning information: on the designated channel, listening for a second predetermined duration, receiving a response frame sent by the access point that is received within the second predetermined duration to the user, the response frame carrying the access point a working channel; receiving a beacon frame on the working channel;

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.

Illustratively, the first receiving module 302 can be configured to work on the working channel in the following manner Receiving a beacon frame: for each channel of the working channel, listening for a first predetermined duration, receiving a beacon frame received within a first predetermined duration, and when the first predetermined duration arrives, jumping to the next channel until jumping Go to the last channel of the working channel.

Exemplarily, the first receiving module 302 may be configured to receive information returned by the access point according to the indication information by:

Listening to a second predetermined duration on a predefined channel, receiving a response frame sent by the access point, the response frame carrying a working channel of the access point; receiving a beacon frame on the working channel; the predefined Channel is a channel in a first channel set in which the station sends a wake-up message, or a channel in a second channel set;

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.

Illustratively, the first receiving module 302 can be configured to receive a beacon frame on the working channel by listening to a first predetermined duration for each channel of the working channel, and receiving the first predetermined duration The arriving beacon frame, when the first predetermined duration arrives, jumps to the next channel until it jumps to the last channel of the working channel.

Exemplarily, the first sending module 301 may be further configured to send a probe request frame on each channel in the second channel set, or a probe request frame that does not include a MAC layer load;

The first receiving module 302 may be configured to not receive any response frame within a third predetermined duration, and jump to the next channel; if at least one response frame is received, the current channel is monitored until the first predetermined time arrives, and the receiving The probe response frame sent by the access point jumps to the next channel until it jumps to the last channel of the second channel set;

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.

Exemplarily, when the awake message further carries a specified channel in the second channel set, the first receiving module 302 may be configured to receive information returned by the access point according to the indication information by:

Receiving, on the designated channel, a second predetermined duration, receiving a response frame sent by the access point received within the second predetermined duration; the response frame carrying the working channel of the access point;

The first sending module 301 may be further configured to send a probe request frame on each channel of the working channel, or a probe request frame that does not include a MAC layer load;

The first receiving module 302 may be configured to not receive any response frame within a third predetermined duration, and jump to the next channel; if at least one response frame is received, the current channel is monitored until the first predetermined time arrives, and the receiving The probe response frame sent by the access point jumps to the next channel until it jumps to the last channel of the working channel;

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.

Exemplarily, the first receiving module 302 may be configured to receive information returned by the access point according to the indication information by:

Listening to a second predetermined duration on a predefined channel, receiving a response frame sent by the access point; the predefined channel is a channel in a first channel set in which the station sends a wake-up message, or is in a second channel set Channel; the response frame carries a working channel of the access point;

The first sending module 302 may be further configured to send a probe request frame on each channel of the working channel, or a probe request frame that does not include a MAC layer load;

The first receiving module 302 may be configured to not receive any response frame within a third predetermined duration, and jump to the next channel; if at least one response frame is received, the current channel is monitored to reach the first predetermined duration, and the receiving access is received. The probe response frame sent by the point jumps to the next channel until it jumps to the last channel of the working channel; correspondingly,

The processing module 303 can be configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.

Illustratively, the first set of channels and the second set of channels may be in the same or different frequency bands.

This embodiment also provides a site, including the network access device provided by the embodiment shown in FIG.

FIG. 4 is a schematic structural diagram of another network access apparatus according to an embodiment of the present application. As shown in FIG. 4, the network access device provided in this embodiment is applied to an access point, and when the wireless communication access point is in a power-saving state, the site performs a network access operation. The network access device includes:

The second receiving module 401 is configured to receive the sending by the station on the channel in the first channel set a wake-up message, where the wake-up message carries indication information, where the indication information is used to indicate that the station needs to perform network access;

The second sending module 402 is configured to: when it is determined that the wakeup identifier in the wakeup message matches the self wakeup identifier, return information to the site according to the indication information in the wakeup message.

Exemplarily, the second sending module 402 may be configured to determine that the wakeup identifier and the self wakeup identifier in the wakeup message match by:

When the wake-up identifier includes one or more combinations of the following identifiers, the same as the self-awake identifier: the SSID of the access point, the value obtained by the operation of the SSID, the BSSID of the access point, the value obtained by the BSSID, and the wildcard SSID, a wildcard BSSID; wherein the value obtained by the operation of the SSID includes: a partial byte of the SSID, or an SSID obtained by a compression algorithm; the calculated value of the BSSID includes: a partial byte of the BSSID, or is compressed The BSSID obtained by the algorithm.

Illustratively, the indication information carried in the awake message may indicate that the scanning type performed by the station is an active scanning or a passive scanning; or the indication information may indicate that the type of the awake message is used for waking up Incoming and performing a wake-up message for network access, and the site will by default perform one of the following scan types: active scan, passive scan.

Exemplarily, the second sending module 402 may be configured to return information to the station according to the indication information in the wakeup message by sending a beacon frame on the working channel of the access point itself, if the probe request frame is received, or A probe request frame that does not contain a MAC layer load, and sends a probe response frame to the station.

Illustratively, when the awake message received by the second receiving module 401 further carries a specified channel in the second channel set, the second sending module 402 may be configured to return information according to the indication information in the awake message by: Giving a station: transmitting a response frame to the station on the designated channel, the response frame carrying a working channel of the access point; transmitting a beacon frame on the working channel, if receiving a probe request frame, or A probe request frame that does not contain a MAC layer load, and sends a probe response frame to the station.

Exemplarily, the second sending module 402 can be configured to return information to the site according to the indication information in the wakeup message by:

Sending a response frame to the station on a predefined channel, where the response frame carries the access a working channel of a point; the predefined channel is a channel in a first channel set in which the station sends a wake-up message, or a channel in a second channel set; transmitting a beacon frame on the working channel, if A probe response frame is sent to the station to the probe request frame or a probe request frame that does not include a MAC layer load.

This embodiment further provides an access point, including the network access apparatus provided in the embodiment shown in FIG.

FIG. 5 is a schematic structural diagram of a network access system according to an embodiment of the present application. As shown in FIG. 5, the network access system includes: a site and an access point;

Sites, including:

a first sending module, configured to send one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries indication information, The indication information is used to indicate that a site needs to perform network access;

a first receiving module, configured to receive information returned by the access point according to the indication information;

a processing module, configured to perform network access according to the returned information;

Access points, including:

a second receiving module, configured to receive, on a channel in the first channel set, a wake-up message sent by the first sending module of the station, where the wake-up message carries indication information, where the indication information is used to indicate that a site needs to perform a network Access

The second sending module is configured to: when it is determined that the wakeup identifier in the wakeup message matches the self wakeup identifier, return the information to the first receiving module of the site according to the indication information in the wakeup message.

For the other content of the site and the access point, refer to the embodiment shown in FIG. 3 and the detailed description of the embodiment shown in FIG. 4, and details are not described herein again.

FIG. 6 is a flowchart of a network access method according to an embodiment of the present application. As shown in FIG. 6, the network access method includes:

Step 601: The station sends one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries indication information, where the indication The information is used to indicate that there is a site that needs to perform network access;

Step 602: The access point receives the wakeup message sent by the station on the channel in the first channel set.

Step 603: When the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, the information is returned to the site according to the indication information in the wakeup message.

Step 604: The station receives information returned by the access point according to the indication information.

Step 605: The station performs network access according to the returned information.

For the rest of the method, refer to the embodiment shown in FIG. 1 and the detailed description of the embodiment shown in FIG. 2, and details are not described herein again.

The technical solutions of the present application are exemplarily described below through application examples.

Application example 1

According to the spectrum planning of different countries and regions, the unlicensed frequency band used by WLAN (Wireless Local Area Network) is pre-divided into multiple channels, each channel is numbered, and the start of each channel is given. Frequency, channel spacing, bandwidth size and other parameters. Taking 2.4 GHz (GHz) and 5 GHz as an example, the bandwidth of each channel defaults to 20 MHz (megahertz). An AP selects a 20MHz channel as the primary channel to establish a BSS. Multiple 20MHz channels can be used simultaneously. The working channel bandwidth can be 20MHz or 40MHz or 80MHz or 160MHz or 80+80MHz (two 80MHz discontinuities).

Referring to FIG. 7, if the AP's working channel bandwidth is 80 MHz, the AP transmits a beacon frame on the primary 20 MHz channel, and the station exchanges other management frames; the AP can support transmission of 20 MHz or 40 MHz or 80 MHz data frames, so Transceiver data frames and control frames with stations on a 20 MHz or 40 MHz or 80 MHz channel. The control frame is an ACK (Acknowledgement) frame, a BA (Block Acknowledgement) frame, an RTS (Request To Send) frame, and a CTS (Clear To Send) frame.

In this example, the AP is configured with a power-saving module. As shown in Figure 8, when the AP does not have uplink and downlink services, the AP can only save the power-saving module and enter the power-saving state. The power saving module of the AP only needs to continuously or non-continuously listen to the wake-up signal from the station on a specific channel. The channel of the AP's power-saving module listening for the wake-up signal is pre-configured by the system. Among them, there are several possible configurations:

Manner 1: The center frequency of the channel pre-configured by the AP to monitor the wake-up signal is located inside the 20 MHz channel of the system, and the bandwidth is the default value. A simple implementation manner is: the channel bandwidth of the default listening wake-up signal is 4 MHz, and multiple such channels are configured, and each channel is used for monitoring by one or more APs, and the center frequency of all channels falls within the system partition. One or more internal channels of 20 MHz; the working channel of the AP is in the same frequency band as the channel for monitoring the wake-up signal, for example, both in the 2.4 GHz band, or both in the 5 GHz band, and may overlap with it;

Manner 2: The center frequency of the channel for pre-configuring the AP to listen for the wake-up signal is located in the middle of the two 20 MHz channels divided by the system, for example, at 2.4 GHz, the channel numbers are 1 and 6, and a certain spare frequency band is left between 6 and 11. The frequency band is divided into one or more channels for one or more APs to listen to wake-up signals;

Mode 3: Similar to mode 1, but the difference is that the pre-configured channel for monitoring the wake-up signal is located in a different frequency band from the working channel of the AP. For example, the pre-configured channel for listening for wake-up signals is at 2.4 GHz, while the AP's working channel is at 5 GHz, or below 1 GHz, or in the 45 GHz or 60 GHz band.

The site that wakes up the AP may have data to send to the AP, or it may want to access the AP in the power-saving state. This example is mainly for the latter case. When a site wants to access an AP but does not receive the AP signal after active scanning or passive scanning, or does not find an AP after active scanning or passive scanning, if it wants to detect whether an AP exists, the site is in the pre-configured AP. The awake message needs to carry a wake-up identifier in the wake-up message to achieve the purpose of waking up the AP. The wake-up message is sent to the awake message on one or more channels in the channel set of the wake-up signal. Or, the site wants to perform network access. Considering that there may be an AP in the power-saving state in the network, the site first sends a wake-up message to wake up the AP. The AP that is already in normal working state can ignore the message. After the site sends the wake-up message, it performs network scanning to complete network access.

The value of the wake-up flag may be the following:

At least one of an SSID and a BSSID of the target access point;

At least one of a partial byte of the SSID of the target access point and a partial byte of the BSSID;

The SSID and the BSSID of the target access point are at least one of values obtained by the compression algorithm, for example, the compression algorithm is a hash algorithm;

At least one of a wildcard SSID and a wildcard BSSID.

Based on the above situations, the wake-up signal has the following transmission methods:

The receiving address is a unicast address, and carries one or a combination of two or more of the following identifiers of the AP that is desired to be accessed: the SSID, the BSSID, the value obtained by calculating the SSID, and the calculated value obtained by the BSSID;

The receiving address is a multicast address or a broadcast address, and carries one or a combination of two or more of the following identifiers of the APs that are desired to be accessed: the SSID, the BSSID, the value obtained by calculating the SSID, and the calculated value obtained by the BSSID. ;

The receiving address is a multicast address or a broadcast address, and carries one or a combination of two or more of the following identifiers of the APs that are desired to be accessed: the SSID, the BSSID, the value obtained by calculating the SSID, and the calculated value obtained by the BSSID. Or, at least one of a wildcard SSID and a wildcard BSSID.

If the system is pre-configured with multiple APs listening to the wake-up channel, the station may send one or more wake-up signals on one channel, or send one or more wake-up signals on each channel in turn, or use parallel transmission. At the same time, multiple wake-up signals are sent on multiple channels, and the wake-up identifiers carried in each wake-up signal may be the same or different.

In this embodiment, the wake-up signal sent by the station carries a network scan type indication, indicating its own scan type: active scanning, or passive scanning. A simple implementation manner is: the wake-up message can indicate various operations that the terminal may perform: network scanning, location reporting, data transmission, etc., setting a bitmap in the wake-up message, and each bit of the bitmap indicates whether there is a corresponding The indication bit, 0 means no, 1 means existence. When the bit corresponding to the network scanning operation in the bitmap is 1, it indicates that there is a network scan type indication bit, and another bit of the scan type indication bit is followed by the bitmap, and the value 1 indicates active scanning, and the value is 0. Time indicates passive scanning.

When the power saving module of the AP receives the wakeup message matching the wakeup identifier of the AP, or carries the wildcard SSID or the wakeup message of the wildcard BSSID, the AP changes from the power saving state to the working state, and the transceiver module is opened, and the master of the working channel is activated. A beacon frame is started to be transmitted on the channel. After the station sends the wake-up signal, it goes to the working channel set of the AP. If passive scanning is performed, the station expects to receive one or more Beacon frames. The working channel set of the AP mentioned here is generally stored in the site, and is a channel list, which is sent by the management entity inside the site during scanning. Send to the MAC entity to perform the scan. The channel list includes the working channel of the AP that was accessed by the site last time, or a group of consecutive or non-contiguous channels located in a certain frequency band.

When performing passive scanning, the station continuously receives a certain length of time T1 for each channel in the working channel set. The system pre-defines the time length value. When the time arrives, the station proceeds to the next channel, continues to receive, and all channels are scanned and processed. If the AP that you want to access or the AP that is suitable for access is found, the subsequent access operations are performed.

Another implementation manner of the passive scanning is that the power saving module of the system pre-defined AP monitors the mapping relationship between the channel of the wake-up signal and the AP working channel, for example, the channel 1 that monitors the wake-up signal, corresponding to the working channel number 1, and listens Channel 2 of the wake-up signal corresponds to working channel number 6, and so on. When there is a predefined mapping relationship, if the station sends a wake-up signal on the listening channel 1, the station directly transfers to the working channel 1 to receive the Beacon frame after transmitting the wake-up signal. If the station sends a wake-up signal on multiple listening channels, the station continuously listens to T1 on the working channel corresponding to each listening channel. When the time arrives, it transfers to the next channel, continues to receive, all channels are scanned, and the scanning result is processed. .

Application example 2

The configuration of the channel for listening to the wake-up signal, the value of the wake-up identifier, and the sending method of the wake-up message are the same as those of the application example 1. In the application example, the scan type of the site is active scanning.

After the station sends the wake-up signal, it goes to the working channel set of the AP and performs active scanning for each channel. The probe request frame or the NDP (Null Data Packet) probe request frame is sent on one channel. If no response frame is received within the T3 time, the jump to the next channel starts to send the probe request frame. If any response frame is received, the T1 duration is always monitored. When the T1 duration arrives, the next channel is transmitted and the probe request frame is started.

Another implementation manner of the active scanning is that the power saving module of the pre-defined AP monitors the mapping relationship between the channel of the wake-up signal and the AP working channel, for example, the channel 1 that monitors the wake-up signal, corresponding to the working channel number 1, and listens Channel 2 of the wake-up signal corresponds to working channel number 6, and so on. When there is a predefined mapping relationship, if the station sends a wake-up signal on the listening channel 1, the station directly transfers to the working channel 1 to send the probe request frame after transmitting the wake-up signal. If the station sends a wake-up signal on multiple listening channels, the station corresponds to each listening channel. The probe request frame or the NDP probe request frame is sent on the working channel. If no response frame is received within the T3 time, the jump to the next channel starts to send the probe request frame, and if any response frame is received, the T1 is always monitored. The duration, when the T1 duration arrives, moves to the next channel and starts transmitting the probe request frame.

The power saving module of the AP receives the wake-up message matching the wake-up identifier of the AP, or the wake-up message carrying the wildcard SSID/BSSID, and the wake-up message indicates that the sender is performing network access, and the AP changes from the power-saving state to the working state. The transceiver module is started, and the Beacon frame is sent. If the probe request frame is received, or the probe request frame (hereinafter referred to as the NDP probe request frame) that does not include the MAC layer load, the probe request frame may carry a wildcard SSID or a wildcard BSSID. Or, if the receiving address is the AP, the AP sends a probe response frame to the station.

After the site scans all the channels, the scan result is processed. If the AP that you want to access or the AP that is suitable for access is found, the subsequent access operations are performed.

Application example 3

The configuration of the channel on which the AP listens for the wake-up signal, the value of the wake-up identifier, and the method of transmitting the wake-up message are the same as in the application example 1.

Different from the application example 1, in this example, the station carries a channel information in the wake-up message, and the channel is generally one of the AP working channel sets, and can be used for the channel for normal data transmission and reception of the AP. After the site provides the channel indication information, when the wake-up message is sent, the station will go to the channel for a certain period of time T2, in order to receive a response frame sent by one or more APs that wake up by itself, for example, An acknowledgement frame. The AP indicates the specific identity of its own working channel in the response frame, such as the channel number. The channel information carried by the station in the wake-up message may also be multiple, for example, one channel is assigned to one group of APs, and another channel is designated for another group of APs, and the station can monitor the specified channels in parallel for a length of time T2. Receive the response frame sent by the AP. Alternatively, the station carries a set of channel numbers in the wake-up message, and multiple APs randomly select channels to contend for transmission, and the station monitors the channels in parallel and receives the response frames sent by the AP within the length of T2.

It should be noted that the station can send a wake-up message and try to wake up multiple APs. It is possible that these APs are woken up and start to send response frames on the same designated channel after entering the working state from the power-saving state. In this case, the AP sends a response frame by means of contention transmission. AP It is possible to try to compete for multiple transmissions within T2 time, end the transmission when T2 arrives, or only send once, and then end the transmission.

The AP receives the wake-up message sent to itself, and if the channel information is carried, the AP contends to send a response frame to the station, which carries its own working channel information, after entering the working state from the power-saving state. After the specified channel is sent, the AP switches to its own working channel to start transmitting the beacon frame.

The station receives response frames of several APs in time T2, obtains their working channel information, performs passive scanning on these channels, and operates the passive scanning process of the application example 1.

If the station performs active scanning, the station sends a probe request frame or an NDP probe request frame on its own working channel indicated by the AP in each received response frame, and if no response frame is received within time T3, the station skips. Go to the next channel to start sending the probe request frame. If any response frame is received, it will always listen to the T1 duration. When the T1 duration arrives, it will go to the next channel and start sending the probe request frame.

After the specified channel is sent, the AP switches to its own working channel. If a probe request frame is received, the AP sends a probe response frame to the station.

If the station does not receive any response frame on the channel specified in the wakeup message, the station shall implement active or passive according to the application instance 1 or application instance 2 on each channel in the channel list configured by its own management entity. scanning.

Another implementation manner of this embodiment is that the response frame sent by the AP on the designated channel of the station carries the necessary information for performing network access, in addition to the working channel carrying the AP. The necessary information for performing network access herein may be a subset of the information in the Beacon frame or the probe response frame, such as the BSSID of the AP, the SSID, the beacon frame interval of the AP, the capability parameter of the AP, etc., and may also include the network type. , AP application type and other information required for network selection. The type of the response frame may be a management frame, such as a newly added management frame, or a multiplexed channel conversion management frame.

After receiving one or more response frames in the T2 time, the station may perform AP selection according to at least one of information content and signal reception strength of the response frame, and pre-screen out a plurality of APs that may be further scanned or accessed, and Sending a radio frame to the selected one or more APs on the designated channel, for example, a management frame, or a control frame, the radio frame is an acknowledgement frame for the response frame sent by the AP, to notify the AP that it has been selected. After sending, the site will go to the selected one or On multiple APs' working channels. If only one AP is selected, the AP can be directly associated with the AP. If multiple APs are selected, active scanning or passive scanning can be performed on the channels on which the APs work, and then the system parameters of the APs are obtained. The selected target accesses the AP and completes network access.

If the AP does not receive the radio frame sent by the station to itself, or receives the radio frame, but the receiving address is not itself, the AP does not need to go to the working channel to return to the power saving state. Thereby saving the power of the AP. Here, the radio frame sent to itself includes: the receiving address of the radio frame matches its own MAC address, or the receiving address of the radio frame is a broadcast address, but the radio frame carries its own identification information (wakeup identifier, BSSID, SSID) Wait).

Application example 4

The configuration of the channel on which the AP listens for the wake-up signal, the value of the wake-up identifier, and the method of transmitting the wake-up message are the same as in the application example 1.

In this example, the site does not carry the channel information in the wake-up message. After the AP enters the working state from the power-saving state, the AP sends a response frame to the site by default on the predefined channel, and the response frame carries the working channel of the AP itself. The predefined channel here may be a channel that receives a wake-up message, or a channel in a second set of channels pre-defined by the system. The station will listen to the T2 duration on the channel to receive response frames from one or more APs. The AP may contend to send the response frame one or more times in T2, switch to the working channel when T2 arrives, or switch to the working channel only once.

After the AP switches to the working channel, it starts to send Beacon frames.

The station may receive several response frames within T2, and perform passive scanning or active scanning for each channel on the working channel indicated in these response frames.

It should be noted that, in the above application examples 1 to 4, the values of T1, T2, and T3 may be set to be the same or different.

During active scanning, the station sends a probe request frame or an NDP probe request frame to each channel on the working channel indicated by the response frame. If no response frame is received within time T3, the station jumps to the next channel. Send a probe request frame, if it receives any response frame, it will always listen The T1 duration, when the T1 duration arrives, moves to the next channel and starts transmitting the probe request frame.

After the AP transitions to the working channel, it receives a probe request frame response probe response frame sent to itself.

After the AP switches to the working channel, if any frame sent by the station is not received within the duration T4, the power saving state is re-entered.

Another implementation manner of this embodiment is that the response frame sent by the AP on the designated channel of the station carries the necessary information for performing network access, in addition to the working channel carrying the AP. The necessary information for performing network access herein may be a subset of the information in the Beacon frame or the probe response frame, such as the BSSID of the AP, the SSID, the beacon frame interval of the AP, the capability parameter of the AP, etc., and may also include the network type. , AP application type and other information required for network selection. The type of the response frame may be a management frame, such as a newly added management frame, or a multiplexed channel conversion management frame.

After receiving one or more response frames in the T2 time, the station may perform AP selection according to at least one of information content and signal reception strength of the response frame, and pre-screen out a plurality of APs that may be further scanned or accessed, and Sending a radio frame, such as a management frame, or a control frame, to the selected one or more APs on the designated channel. After the transmission is completed, the site goes to the working channel of the selected one or more APs. If only one AP is selected, the AP can be directly associated with the AP. If multiple APs are selected, active scanning or passive scanning can be performed on the channels on which the APs work, and then the system parameters of the APs are obtained. The selected target accesses the AP and completes network access.

If the AP does not receive the radio frame sent by the station to itself, or receives the radio frame, but the receiving address is not itself, it does not need to go to the working channel, and can directly return to the power saving state, thereby saving the AP's power. Here, the radio frame sent to itself includes: the receiving address of the radio frame matches its own MAC address, or the receiving address of the radio frame is a broadcast address, but the radio frame carries its own identification information (wakeup identifier, BSSID, SSID) Wait).

Application example 5

The configuration of the channel for monitoring the wake-up signal of the AP, the value of the wake-up identifier, and the sending method of the wake-up message are the same as the application example 1. Unlike the application instance 1, in this application example, when the station sends a wake-up message, the wake-up message is received. The message type indication indicates that the wake-up message is a wake-up message for network access, and after receiving the message, the access point parses the message type and determines that the message is performed. The wake-up message of the network access considers that the sending site needs to perform a network scan.

The type of network scan performed by the site can be pre-configured to a default type, such as pre-configured as passive scanning, or active scanning. The access point receives the wake-up message, and by default, the site is about to undergo a passive scan, or is about to perform an active scan.

If the default scan type is passive scanning, the implementation manner is the same as application example 1;

If the default scan type is active scanning, the implementation manner is the same as application example 2;

If the default scan type is passive scanning or active scanning, and the awake message also carries the designated channel, the implementation manner is the same as the application example 3;

If the default scan type is passive scan or active scan, and the specified channel that the AP sends the response frame is a predefined channel, the implementation manner is the same as that of the application example 4.

The embodiment of the present application sends one or more wake-up messages on the channel in the first channel set by the station, where the wake-up message carries indication information, where the indication information is used to indicate that the site needs to perform network access, The wake-up message is used to wake up one or more access points. After the access point wakes up, the information is returned to the station according to the indication information, where the return information includes a Beacon frame or a probe response frame sent by the AP, and the station returns according to the Information performs network access. The embodiment of the present application can implement a fast network access operation.

In addition, the embodiment of the present application further provides a computer readable medium, where a network access program is stored, and the network access program is executed by a processor to implement the steps of any one of the foregoing network access methods.

Those of ordinary skill in the art will appreciate that all or some of the steps, systems, and functional blocks/units of the methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be composed of several physical The components work together. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer readable medium, which may include computer storage media (or non-transitory media) and communication media (or transitory media). As is well known to those of ordinary skill in the art, the term computer storage medium is included for storing information (such as computer readable instructions, data structures, program modules). Volatile and non-volatile, removable and non-removable media implemented in any method or technology, or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridge, magnetic tape, magnetic disk storage or other magnetic storage device, or may Any other medium used to store the desired information and that can be accessed by the computer. Moreover, it is well known to those skilled in the art that communication media typically includes computer readable instructions, data structures, program modules, or other data in a modulated data signal, such as a carrier wave or other transport mechanism, and can include any information delivery media. .

The above description is only an exemplary embodiment of the present application, and is not intended to limit the present application, and various changes and modifications may be made to the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application are intended to be included within the scope of the present application.

Industrial applicability

The embodiment of the present invention provides a network access method, device, and system, where a station can quickly discover a network existing on a channel and perform network access, thereby effectively reducing network connection caused by the access point being in a power-saving state. Enter the delay.

Claims (48)

1. A network access method includes:

   The station transmits one or more wake-up messages (101) on a channel in the first set of channels, wherein the wake-up message is used to wake up one or more access points, the wake-up message carrying indication information, the indication The information is used to indicate that the site needs to perform network access;

   The station receives information returned by the access point according to the indication information (102);

   The station performs network access based on the returned information (103).
2. The method of claim 1 wherein said first set of channels is a set of channels for said one or more access points to listen for wake-up messages.
3. The method of claim 1, wherein the wake-up message carries a wake-up identifier of the one or more access points, the wake-up identifier comprising one or a combination of two or more of the following: access Point service set identifier SSID, SSID calculated value, access point basic service set identifier BSSID, BSSID calculated value, wildcard SSID, wildcard BSSID;

   The calculated value of the SSID includes: a partial byte of the SSID, or an SSID obtained by a compression algorithm; the calculated value of the BSSID includes: a partial byte of the BSSID, or a BSSID obtained by a compression algorithm.
4. The method of claim 1 wherein said station transmits one or more wake-up messages on a channel in the first set of channels, comprising: sequentially transmitting one or more wake-ups on a channel in the first set of channels Message, or sequentially transmitting one or more wake-up messages on each of a plurality of channels in the first set of channels, or transmitting multiple wake-ups in parallel on each of the plurality of channels in the first set of channels Message.
5. The method of claim 1, wherein the indication information carried in the wake-up message indicates that the scan type performed by the station is an active scan or a passive scan; or the indication information indicates a type of the wake-up message. A wake-up message for waking up the access point and performing network access, and the site will by default perform one of the following scan types: active scanning, passive scanning.
6. The method of claim 1, wherein the station receiving information returned by the access point according to the indication information comprises: the station receiving a beacon frame on a channel in the second channel set;

   Performing, by the station, network access according to the returned information, including: the site acquiring a beacon After the frame, select the access point to perform network access.
7. The method of claim 6 wherein said second set of channels is a set of working channels for data and signaling for said one or more access points.
8. The method of claim 7 wherein said station receives a beacon frame on a channel in the second set of channels, comprising: for each channel, listening for a first predetermined duration, the receiving being received within a first predetermined duration The beacon frame, when the first predetermined duration arrives, jumps to the next channel until it jumps to the last channel of the second channel set.
9. The method of claim 1, wherein when the awake message further includes a designated channel in the second channel set, the station receives information returned by the access point according to the indication information, including: the site is Receiving, on the designated channel, a second predetermined duration, receiving a response frame sent by the access point that is received in the second predetermined duration, and the response frame carries a working channel of the access point; The station receives a beacon frame on the working channel;

   The performing network access by the station according to the returned information includes: after the station acquires a beacon frame, selecting an access point to perform network access.
10. The method according to claim 1, wherein the station receives information returned by the access point according to the indication information, comprising: the station listening for a second predetermined duration on a predefined channel, and receiving the sending by the access point. a response frame, the response frame carrying a working channel of the access point; the station receiving a beacon frame on the working channel; the predefined channel being a first channel set in which the station sends a wake-up message Channel, or channel in the second channel set;

    The performing network access by the station according to the returned information includes: after the station acquires a beacon frame, selecting an access point to perform network access.
11. The method of claim 9 or 10, wherein the station receives a beacon frame on the working channel, comprising: listening to a first predetermined duration for each channel of the working channel, receiving within a first predetermined duration The received beacon frame, when the first predetermined duration arrives, jumps to the next channel until it jumps to the last channel of the working channel.
12. The method of claim 9 or 10, wherein the response frame further carries necessary information for performing network access;

    Performing, by the station, network access according to the returned information, including: the site accessing Point selection and transmitting a radio frame to the selected one or more access points on the designated channel; the station receives the beacon frame on the working channel of the selected one or more access points, performing subsequent connections Into the operation.
13. The method of claim 1, wherein the station receiving information returned by the access point according to the indication information comprises: the station transmitting a probe request frame on each channel in the second channel set, or not including The media access control MAC layer load probe request frame does not receive any response frame within the third predetermined duration, and jumps to the next channel; if at least one response frame is received, the current channel listens to the first predetermined duration to arrive. Receiving a probe response frame sent by the access point, and jumping to the next channel until jumping to the last channel of the second channel set;

    The performing network access by the station according to the returned information includes: after the station acquires the probe response frame, selecting the access point to perform network access.
14. The method of claim 1, wherein when the awake message further carries a designated channel in the second channel set, the station receives information returned by the access point according to the indication information, including: the site is Receiving, on the designated channel, a second predetermined duration, receiving a response frame sent by an access point received within a second predetermined duration; the response frame carrying a working channel of the access point; and the station is in the working channel Each channel in the transmission sends a probe request frame, or a probe request frame that does not include a media access control MAC layer load, does not receive any response frame within a third predetermined duration, and jumps to the next channel; if at least one is received The response frame arrives at the first predetermined duration of the current channel, receives the probe response frame sent by the access point, and jumps to the next channel until it jumps to the last channel of the working channel;

    The performing network access by the station according to the returned information includes: after the station acquires the probe response frame, selecting the access point to perform network access.
15. The method according to claim 1, wherein the station receives information returned by the access point according to the indication information, comprising: the station listening for a second predetermined duration on a predefined channel, and receiving the sending by the access point. a response frame; the predefined channel is a channel on a first channel set in which the station sends a wake-up message, or a channel on a second channel set; the response frame carries a working channel of the access point; The station sends a probe request frame on each channel of the working channel, or a probe request frame that does not include a media access control MAC layer load, and does not receive any response frame within the third predetermined duration, and jumps to the next channel; Received at least one response frame, listening on the current channel Arriving until the first predetermined time period, receiving the probe response frame sent by the access point, and jumping to the next channel until jumping to the last channel of the working channel;

    The performing network access by the station according to the returned information includes: after the station acquires the probe response frame, selecting the access point to perform network access.
16. The method of claim 14 or 15, wherein the response frame further carries necessary information for performing network access;

    Performing, by the station, network access according to the returned information, including: the station performs an access point selection, and sends a radio frame to the selected one or more access points on the designated channel; Confirming the response frame; the station sends a probe request frame on the working channel of the selected one or more access points, and performs subsequent access operations.
17. The method of claim 6 wherein said first set of channels and said second set of channels are in the same or different frequency bands.
18. The method of claim 14, wherein the first predetermined duration, the second predetermined duration, and the third predetermined duration are the same or different.
19. A network access method includes:

    The access point receives the awake message (201) sent by the station on the channel in the first channel set, where the awake message carries indication information, where the indication information is used to indicate that the station needs to perform network access;

    When the access point determines that the wake-up identifier in the wake-up message matches the self-awake identifier, the access point returns information to the station according to the indication information in the wake-up message (202).
20. The method of claim 19, wherein the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, and includes: when the wakeup identifier includes one or more of the following identifiers Same as the self-awake identifier: the service set identifier SSID of the access point, the value obtained by the operation of the SSID, the basic service set identifier BSSID of the access point, the calculated value of the BSSID, the wildcard SSID, the wildcard BSSID;

    The value obtained by the operation of the SSID includes: a partial byte of the SSID or an SSID obtained by a compression algorithm; and the calculated value of the BSSID includes: a partial byte of the BSSID, or a BSSID obtained by a compression algorithm.
21. The method of claim 19, wherein the indication information carried in the wake-up message indicates that the scan type performed by the station is an active scan or a passive scan; or the indication information in the wake-up message indicates the The type of wake-up message is a wake-up message for waking up the access point and performing network access, and the station will by default perform one of the following scan types: active scan, passive scan.
22. The method of claim 19, wherein the access point returns information to the station according to the indication information in the wake-up message, comprising: the access point transmitting a beacon frame on its own working channel, if received A probe request frame, or a probe request frame that does not include a media access control MAC layer load, the access point transmitting a probe response frame to the station.
23. The method of claim 19, wherein when the awake message further carries a designated channel in the second channel set, the access point returns information to the station according to the indication information in the awake message, including: The access point sends a response frame to the station on the designated channel; the response frame carries a working channel of the access point; and the access point sends a beacon frame on the working channel, if To the probe request frame, or a probe request frame that does not include a media access control MAC layer load, the access point sends a probe response frame to the station.
24. The method of claim 19, wherein the access point returns information to the site according to the indication information in the wake-up message, including:

    Sending, by the access point, a response frame to the station on a predefined channel, where the response frame carries a working channel of the access point; the predefined channel is the first that the station sends a wake-up message a channel in a set of channels, or a channel in a second set of channels;

    The access point sends a beacon frame on the working channel, and if the probe request frame is received, or a probe request frame that does not include a media access control MAC layer load, the access point sends a probe response to the station. frame.
25. The method of claim 19, wherein the access point returns information to the site according to the indication information in the wake-up message, including:

    The access point sends a response frame to the station on the designated channel; the response frame carries the working channel of the access point, and further carries necessary information for the site to perform network access;

    Receiving, by the access point, the radio frame sent by the station after sending the response frame, the access Point transmitting a beacon frame on the working channel, waiting to receive a probe request frame sent by the station, or a probe request frame not including a media access control MAC layer load; if receiving the probe request frame, the connecting The ingress point sends a probe response frame to the station;

    The access point does not receive the radio frame sent by the station to itself after transmitting the response frame, or receives the radio frame sent by the station, and returns to the power saving state when the receiving address is not itself.
26. The method according to any one of claims 22 to 25, further comprising: after the access point is switched to the working channel, the frame from the station is not received within the fourth predetermined duration, the connection The entry point enters a power saving state (203).
27. A network access device includes:

    The first sending module (301) is configured to send one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message is carried Instructing information, the indication information is used to indicate that the site needs to perform network access;

    The first receiving module (302) is configured to receive information returned by the access point according to the indication information;

    The processing module (303) is configured to perform network access according to the returned information.
28. The network access device of claim 27, wherein the first transmitting module (301) is configured to transmit one or more wake-up messages on a channel in the first set of channels by: listening at the access point One or more wake-up messages are sent on the set of channels of the wake-up message.
29. The network access device of claim 27, wherein the first transmitting module (301) is configured to transmit one or more wake-up messages by transmitting a wake-up identifier carrying one or more access points Message.
30. The network access device of claim 27, wherein the first transmitting module (301) is configured to transmit one or more wake-up messages on a channel in the first set of channels by: ordering on one channel One or more wake-up messages are sent, or one or more wake-up messages are sequentially transmitted on each of a plurality of channels, or multiple wake-up messages are transmitted in parallel on multiple channels.
31. The network access device of claim 27, wherein the indication information carried in the wake-up message sent by the first sending module (301) indicates that the scanning type performed by the station is active scanning or passive scanning; or The indication information indicating that the type of the wakeup message is used for calling Wake up the access point and perform a wake-up message for network access, and the site will by default perform one of the following scan types: active scan, passive scan.
32. The network access device of claim 27, wherein the first receiving module (302) is configured to receive information returned by the access point according to the indication information by: on a channel in the second channel set Receiving a beacon frame;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.
33. The network access device of claim 32, wherein the first receiving module (302) is configured to receive a beacon frame on a channel in the second set of channels by: in the one or more A beacon frame is received on a channel in a set of working channels for data and signaling.
34. The network access device of claim 27, wherein when the wakeup message sent by the first sending module (301) further includes a designated channel in the second channel set, the first receiving module (302) is configured. The information returned by the access point according to the indication information is received by:

    Receiving, on the designated channel, a second predetermined duration, receiving a response frame sent by the access point that is received within the second predetermined duration, to the self, the response frame carrying the working channel of the access point; Receiving a beacon frame on the working channel;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.
35. The network access device of claim 27, wherein the first receiving module (302) is configured to receive information returned by the access point according to the indication information by:

    Listening to a second predetermined duration on a predefined channel, receiving a response frame sent by the access point, the response frame carrying a working channel of the access point; receiving a beacon frame on the working channel; the predefined Channel is a channel in a first channel set in which the station sends a wake-up message, or a channel in a second channel set;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired beacon frame.
36. The network access device of claim 34 or 35, wherein the first receiving module (302) is configured to receive a beacon frame on the working channel by: for a working channel Each channel listens for a first predetermined duration and receives a beacon frame received within a first predetermined duration. When the first predetermined duration arrives, it jumps to the next channel until it jumps to the last channel of the working channel.
37. The network access device of claim 27, wherein the first transmitting module (301) is further configured to transmit a probe request frame for each channel in the second channel set or does not include a media access control MAC Layer request probe request frame;

    The first receiving module (302) is configured to receive information returned by the access point according to the indication information by: receiving no response frame within a third predetermined duration, jumping to the next channel; At least one response frame arrives at the current channel for the first predetermined duration, receives the probe response frame sent by the access point, and jumps to the next channel until the last channel of the second channel set is jumped;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.
38. The network access device of claim 27, wherein when the awake message further carries a designated channel in the second channel set, the first receiving module (302) is configured to receive an access point according to the following manner according to And the information returned by the indication information: monitoring, on the designated channel, a second predetermined duration, and receiving a response frame sent by the access point received within the second predetermined duration; the response frame carrying the access point Working channel

    The first sending module (301) is further configured to send a probe request frame on each channel of the working channel, or a probe request frame that does not include a media access control MAC layer load, and does not have a third predetermined duration Receiving any response frame, jumping to the next channel; if at least one response frame is received, the current channel is monitored until the first predetermined time arrives, and the probe response frame sent by the access point is received, and the next channel is reached. Jump to the last channel of the working channel;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.
39. The network access device of claim 27, wherein the first receiving module (302) is configured to receive information returned by the access point according to the indication information by: listening to the second on a predefined channel Receiving a response frame sent by the access point; the predefined channel is a channel on a first channel set in which the station sends a wake-up message, or a channel on a second channel set; the response frame carries The working channel of the access point;

    The first sending module (301) is further configured to send a probe request frame on each channel of the working channel, or a probe request frame that does not include a media access control MAC layer load;

    The first receiving module (302) is configured to not receive any response frame within a third predetermined duration, and jump to the next channel; if at least one response frame is received, the current channel is monitored until the first predetermined time arrives, Receiving a probe response frame sent by the access point, and jumping to the next channel until jumping to the last channel of the working channel;

    The processing module (303) is configured to perform network access according to the returned information by selecting an access point to perform network access according to the acquired probe response frame.
40. A network access device includes:

    The second receiving module (401) is configured to receive, on a channel in the first channel set, a wake-up message sent by the station, where the wake-up message carries indication information, where the indication information is used to indicate that the site needs to perform a network. Access

    The second sending module (402) is configured to: when it is determined that the wakeup identifier in the wakeup message matches the self wakeup identifier, return information to the site according to the indication information in the wakeup message.
41. The network access device of claim 40, wherein the indication information carried in the wake-up message indicates that the scan type performed by the station is an active scan or a passive scan; or the indication information indicates the The type of wake-up message is a wake-up message for waking up the access point and performing network access, and the station will by default perform one of the following scan types: active scan, passive scan.
42. The network access device of claim 40, wherein the second transmitting module (402) is configured to return information to the site in accordance with the indication information in the wakeup message by:

    A beacon frame is transmitted on the working channel of the access point itself, and if a probe request frame is received, or a probe request frame that does not include a medium access control MAC layer load, a probe response frame is sent to the station.
43. The network access device of claim 40, wherein the waking message received by the second receiving module (401) further carries a designated channel in the second channel set, and the second sending module (402) is configured. Returning information to the station according to the indication information in the wake-up message by sending a response frame to the station on the designated channel, the response frame carrying a working channel of the access point; Send a beacon frame on the channel, if a probe request frame is received, or A probe request frame containing a media access control MAC layer load, and a probe response frame is sent to the station.
44. The network access device of claim 40, wherein the second transmitting module (402) is configured to return information to the site in accordance with the indication information in the wakeup message by:

    Sending a response frame to the station on a predefined channel, where the response frame carries a working channel of the access point; the predefined channel is a channel in a first channel set in which the station sends a wake-up message Or a channel in the second channel set;

    A beacon frame is transmitted on the working channel, and if a probe request frame is received, or a probe request frame that does not include a media access control MAC layer load, a probe response frame is sent to the station.
45. A site comprising the network access device of any one of claims 27 to 39.
46. An access point comprising the network access device of any one of claims 40 to 44.
47. A network access system includes: a station and an access point;

    The site includes:

    a first sending module, configured to send one or more wake-up messages on a channel in the first channel set, where the wake-up message is used to wake up one or more access points, where the wake-up message carries indication information, The indication information is used to indicate that the site needs to perform network access;

    a first receiving module, configured to receive information returned by the access point according to the indication information;

    a processing module, configured to perform network access according to the returned information;

    The access point includes:

    a second receiving module, configured to receive, on a channel in the first channel set, a wake-up message sent by the first sending module of the station, where the wake-up message carries indication information, where the indication information is used to indicate that the site needs to be executed Network access;

    The second sending module is configured to: when it is determined that the wakeup identifier in the wakeup message matches the self wakeup identifier, return information to the first receiving module of the site according to the indication information in the wakeup message.
48. A network access method includes:

    The station transmits one or more wake-up messages (601) on a channel in the first set of channels, wherein the wake-up message is used to wake up one or more access points, the wake-up message carrying indication information, the indication The information is used to indicate that the site needs to perform network access;

    The access point receives the wake-up message sent by the station on a channel in the first channel set (602);

    When the access point determines that the wakeup identifier in the wakeup message matches the self wakeup identifier, the access point returns information to the site according to the indication information in the wakeup message (603);

    Receiving, by the station, the information returned by the access point according to the indication information (604);

    The station performs network access based on the returned information (605).

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