CN107645781B - Communication method, communication device, station and access point of wireless local area network - Google Patents
Communication method, communication device, station and access point of wireless local area network Download PDFInfo
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Abstract
The invention provides a communication method, a communication device, a station and an access point of a wireless local area network, wherein the communication method of the wireless local area network comprises the following steps: generating a message frame, wherein the message frame comprises a capability identifier, and the capability identifier is used for indicating that a station supports an HEW function and indicating that an access point can send cached downlink data through an OFDMA technology; and sending the message frame to an access point. According to the technical scheme, when the station supporting the HEW function is accessed into the basic service set supporting the HEW function, the transmission of the cached downlink data can be carried out between the access point and the station through the OFDMA technology, the utilization efficiency of a frequency spectrum is effectively improved, and the communication requirement of 802.11ax is met.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication method of a wireless local area network, a communication apparatus of a wireless local area network, a station, and an access point.
Background
In 5 months in 2013, 802.11 has established a research group HEW (High efficiency Wireless local area network) of the next generation Wi-Fi (Wireless Fidelity) technology, namely 802.11ax, and the main research points are to improve the throughput of the existing Wi-Fi technology, improve the effective utilization efficiency and the quality of service (quality of service) of the frequency spectrum, and realize a more intensive communication environment than the existing Wi-Fi technology.
In the existing Wi-Fi standard, a station receives downlink cache data through a TIM (Traffic Indication Map) mechanism, which specifically includes: a station in a PS (Power Saving) state determines whether an AP (Access Point) has downlink data buffered by receiving a TIM message in a Beacon frame, and if so, the station sends a PS-Poll (Power Saving round robin frame) to the AP in a Contention mode during a CP (Contention Period) to obtain the downlink data, and the station is in an Awake state during a CFP (Contention-free Period) until receiving the downlink data. As shown in fig. 1, the PS-Poll sent by the station to the AP and the data sent by the AP to the station are both sent in a unicast manner.
Since the OFDMA (Orthogonal Frequency Division Multiple Access) technology is adopted in 802.11ax, the utilization efficiency of the spectrum is improved. Therefore, it is proposed in the related art that for a station supporting the HEW function, an access point may transmit buffered downlink data to multiple stations simultaneously in a multicast manner by using the OFDMA technology. Specifically, as shown in fig. 2, the access point sends a MU-RTS (Multi-User Request to Send) frame, and after the station feeds back a CTS (Clear to Send) frame, the access point sends downlink data in a multicast manner.
In consideration of the backward compatibility problem, a station supporting the HEW function may access to a BSS (basic Service Set) of 802.11ac/n/g/b/a, and a station supporting the HEW function may also switch from the BSS of 802.11ac/n/g/b/a to the BSS supporting the HEW function. For a station supporting the HEW function, when switching from a BSS that does not support the HEW function to a BSS that supports the HEW function or switching from a BSS that supports the HEW function to a BSS that does not support the HEW function, how to receive downlink data buffered by the access point should be specified.
Disclosure of Invention
Based on at least one of the above technical problems, the present invention provides a new communication scheme for a wireless local area network, so that when a station supporting the HEW function accesses a basic service set supporting the HEW function, the transmission of buffered downlink data can be performed between the access point and the station through the OFDMA technology, the utilization efficiency of a frequency spectrum is effectively improved, and the communication requirement of 802.11ax is met.
In view of the above, according to a first aspect of the present invention, a communication method of a wireless local area network is provided, including: generating a message frame, wherein the message frame comprises a capability identifier, and the capability identifier is used for indicating that a station supports an HEW function and indicating that an access point can send cached downlink data through an OFDMA technology; and sending the message frame to an access point.
In the technical scheme, the station supporting the HEW function generates the message frame containing the capability identifier, so that the access point can determine the capability of the station according to the capability identifier contained in the message frame when receiving the message frame, and further, when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax; when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, so as to ensure that the buffered downlink data can be sent normally. Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
The station supporting the HEW function performs the CP period when receiving the buffered downlink data transmitted from the access point. Support for HEW functionality, i.e. support for OFDMA techniques.
In the foregoing technical solution, preferably, the communication method of the wireless local area network further includes: when accessing any basic service set, determining whether the any basic service set supports HEW function.
In the technical scheme, when a station accesses any basic service set, the station can determine which communication mechanism is adopted by the station and an access point in the basic service set by determining whether the basic service set supports the HEW function. Specifically, when the basic service set supports the HEW function, the site and the access point transmit the buffered downlink data by using the OFDMA technique, and when the basic service set does not support the HEW function, the access point and the site transmit the buffered downlink data by using the TIM mechanism.
In any of the above technical solutions, preferably, the message frame includes an information element name field, and the capability identifier is a value of the information element name field. For example, the value of the information element name field may be 133.
In any of the above technical solutions, preferably, the message frame is a probe request frame or an association request frame.
According to the second aspect of the present invention, there is also provided a communication method for a wireless local area network, including: receiving a message frame sent by a station, wherein the message frame comprises a capability identifier, and the capability identifier is used for indicating that the station supports an HEW function and indicating that an access point can send cached downlink data through an OFDMA technology; and when the access point supports the HEW function, simultaneously transmitting the buffered downlink data to a plurality of stations supporting the HEW function through an OFDMA technology.
In the technical scheme, the access point receives the message frame which is sent by the station and contains the capability identification, so that the capability of the station can be determined according to the capability identification contained in the message frame, and when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax.
Here, the access point supporting the HEW function performs the CP period when transmitting the buffered downlink data to the plurality of stations supporting the HEW function.
In addition, when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, thereby ensuring that the buffered downlink data can be sent normally.
Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
According to the third aspect of the present invention, there is further provided a communication apparatus for a wireless local area network, including: a generating unit, configured to generate a message frame, where the message frame includes a capability identifier, where the capability identifier is used to indicate that a station supports an HEW function and indicate that an access point may send cached downlink data through an OFDMA technique; a sending unit, configured to send the message frame to an access point.
In the technical scheme, the station supporting the HEW function generates the message frame containing the capability identifier, so that the access point can determine the capability of the station according to the capability identifier contained in the message frame when receiving the message frame, and further, when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax; when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, so as to ensure that the buffered downlink data can be sent normally. Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
The station supporting the HEW function performs the CP period when receiving the buffered downlink data transmitted from the access point.
In the foregoing technical solution, preferably, the communication apparatus of a wireless local area network further includes: a determining unit, configured to determine whether any basic service set supports HEW functionality when the station accesses into any basic service set.
In the technical scheme, when a station accesses any basic service set, the station can determine which communication mechanism is adopted by the station and an access point in the basic service set by determining whether the basic service set supports the HEW function. Specifically, when the basic service set supports the HEW function, the site and the access point transmit the buffered downlink data by using the OFDMA technique, and when the basic service set does not support the HEW function, the access point and the site transmit the buffered downlink data by using the TIM mechanism.
In any of the above technical solutions, preferably, the message frame includes an information element name field, and the capability identifier is a value of the information element name field. For example, the value of the information element name field may be 133.
In any of the above technical solutions, preferably, the message frame is a probe request frame or an association request frame.
According to the fourth aspect of the present invention, there is also provided a communication apparatus for a wireless local area network, including: a receiving unit, configured to receive a message frame sent by a station, where the message frame includes a capability identifier, where the capability identifier is used to indicate that the station supports an HEW function and indicate that an access point can send cached downlink data through an OFDMA technique; and the sending unit is used for sending the cached downlink data to a plurality of sites supporting the HEW function simultaneously through an OFDMA technology when the access point supports the HEW function.
In the technical scheme, the access point receives the message frame which is sent by the station and contains the capability identification, so that the capability of the station can be determined according to the capability identification contained in the message frame, and when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax.
Here, the access point supporting the HEW function performs the CP period when transmitting the buffered downlink data to the plurality of stations supporting the HEW function.
In addition, when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, thereby ensuring that the buffered downlink data can be sent normally.
Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
According to a fifth aspect of the present invention, there is also provided a station, comprising: the communication device of the wireless local area network according to the third aspect.
According to a sixth aspect of the present invention, there is also provided an access point, comprising: a communication apparatus of a wireless local area network as described in the fourth aspect above.
Through the technical scheme, when the station supporting the HEW function is accessed into the basic service set supporting the HEW function, the transmission of the cached downlink data can be carried out between the access point and the station through the OFDMA technology, the utilization efficiency of the frequency spectrum is effectively improved, and the communication requirement of 802.11ax is met.
Drawings
Fig. 1 is a schematic diagram illustrating a buffered downlink data transmission performed by an AP and a station in a unicast manner in the related art;
fig. 2 is a diagram illustrating a buffered downlink data transmission between an AP and a station by using an OFDMA technique in the related art;
fig. 3 shows a schematic flow chart of a communication method of a wireless local area network according to a first embodiment of the present invention;
fig. 4 shows a schematic block diagram of a communication device of a wireless local area network according to a first embodiment of the present invention;
FIG. 5 shows a schematic block diagram of a station according to an embodiment of the invention;
fig. 6 shows a schematic flow chart of a communication method of a wireless local area network according to a second embodiment of the present invention;
fig. 7 shows a schematic block diagram of a communication device of a wireless local area network according to a second embodiment of the present invention;
fig. 8 shows a schematic block diagram of an access point according to an embodiment of the invention;
fig. 9 shows a diagram in which capability values of stations supporting the HEW function are represented in the form of IEs according to an embodiment of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Fig. 3 shows a schematic flow chart of a communication method of a wireless local area network according to a first embodiment of the present invention.
As shown in fig. 3, a communication method of a wireless local area network according to a first embodiment of the present invention includes:
step S30, generating a message frame, where the message frame includes a capability identifier, and the capability identifier is used to indicate that a station supports the HEW function and indicate that an access point can send buffered downlink data through an OFDMA technique.
Wherein the message frame is a probe request frame or an association request frame.
Step S32, sending the message frame to the access point.
In the technical scheme, the station supporting the HEW function generates the message frame containing the capability identifier, so that the access point can determine the capability of the station according to the capability identifier contained in the message frame when receiving the message frame, and further, when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax; when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, so as to ensure that the buffered downlink data can be sent normally. Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
The station supporting the OFDMA technique receives the buffered downlink data transmitted by the access point during the CP period.
In the foregoing technical solution, preferably, the communication method of the wireless local area network further includes: when accessing any basic service set, determining whether the any basic service set supports HEW function.
In the technical scheme, when a station accesses any basic service set, the station can determine which communication mechanism is adopted by the station and an access point in the basic service set by determining whether the basic service set supports the HEW function. Specifically, when the basic service set supports the HEW function, the site and the access point transmit the buffered downlink data by using the OFDMA technique, and when the basic service set does not support the HEW function, the access point and the site transmit the buffered downlink data by using the TIM mechanism.
In any of the above technical solutions, preferably, the message frame includes an information element name field, and the capability identifier is a value of the information element name field. For example, the value of the information element name field may be 133.
The main body of the communication method shown in fig. 3 may be a mobile phone or a PDA (Personal Digital Assistant), or the like.
Fig. 4 shows a schematic block diagram of a communication device of a wireless local area network according to a first embodiment of the present invention.
As shown in fig. 4, a communication apparatus 400 of a wireless lan according to a first embodiment of the present invention includes: a generating unit 402 and a transmitting unit 404.
The generating unit 402 is configured to generate a message frame, where the message frame includes a capability identifier, and the capability identifier is used to indicate that a station supports an HEW function and indicate that an access point can send cached downlink data through an OFDMA technique; the sending unit 404 is configured to send the message frame to the access point.
In a specific implementation, the generating unit 402 may be a signal processor, a central processing unit, a baseband processor, or the like; the transmitting unit 404 may be a transmitter or an antenna, etc.
In the technical scheme, the station supporting the HEW function generates the message frame containing the capability identifier, so that the access point can determine the capability of the station according to the capability identifier contained in the message frame when receiving the message frame, and further, when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax; when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, so as to ensure that the buffered downlink data can be sent normally. Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
The stations supporting the OFDMA technique perform the reception during the CP period when receiving the buffered downlink data transmitted by the access point.
In the above technical solution, preferably, the communication apparatus 400 of the wireless local area network further includes: a determining unit 406, configured to determine whether any basic service set supports HEW functionality when the station accesses into any basic service set.
In a specific implementation, the determining unit 406 may be a central processing unit or a baseband processor, etc.
In the technical scheme, when a station accesses any basic service set, the station can determine which communication mechanism is adopted by the station and an access point in the basic service set by determining whether the basic service set supports the HEW function. Specifically, when the basic service set supports the HEW function, the site and the access point transmit the buffered downlink data by using the OFDMA technique, and when the basic service set does not support the HEW function, the access point and the site transmit the buffered downlink data by using the TIM mechanism.
In any of the above technical solutions, preferably, the message frame includes an information element name field, and the capability identifier is a value of the information element name field. For example, the value of the information element name field may be 133.
In any of the above technical solutions, preferably, the message frame is a probe request frame or an association request frame.
Fig. 5 shows a schematic block diagram of a station according to an embodiment of the invention.
As shown in fig. 5, a station 500 according to an embodiment of the present invention includes: such as the communication device 400 of the wireless local area network shown in fig. 4.
Fig. 6 shows a schematic flow chart of a communication method of a wireless local area network according to a second embodiment of the present invention.
As shown in fig. 6, a communication method of a wireless local area network according to a second embodiment of the present invention includes:
step S60, receiving a message frame sent by a station, where the message frame includes a capability identifier, and the capability identifier is used to indicate that the station supports the HEW function and indicate that the access point can send the buffered downlink data through the OFDMA technique.
Step S62, when the access point supports the HEW function, the buffered downlink data is simultaneously transmitted to a plurality of stations supporting the HEW function by the OFDMA technique.
Here, the access point supporting the HEW function performs the CP period when transmitting the buffered downlink data to the plurality of stations supporting the HEW function.
In the technical scheme, the access point receives the message frame which is sent by the station and contains the capability identification, so that the capability of the station can be determined according to the capability identification contained in the message frame, and when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax.
In addition, when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, thereby ensuring that the buffered downlink data can be sent normally.
Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
Among them, the execution subject of the communication method shown in fig. 6 may be a router or the like.
Fig. 7 shows a schematic block diagram of a communication device of a wireless local area network according to a second embodiment of the present invention.
As shown in fig. 7, a communication apparatus 700 of a wireless lan according to a second embodiment of the present invention includes: a receiving unit 702 and a transmitting unit 704.
The receiving unit 702 is configured to receive a message frame sent by a station, where the message frame includes a capability identifier, where the capability identifier is used to indicate that the station supports an HEW function and indicate that an access point can send cached downlink data through an OFDMA technique; the transmitting unit 704 is configured to transmit the buffered downlink data to multiple stations supporting the HEW function simultaneously through an OFDMA technique when the access point supports the HEW function.
In the technical scheme, the access point receives the message frame which is sent by the station and contains the capability identification, so that the capability of the station can be determined according to the capability identification contained in the message frame, and when the access point also supports the HEW function, the access point can simultaneously send the cached downlink data to a plurality of stations supporting the HEW function through the OFDMA technology, thereby ensuring that the OFDMA technology is reasonably applied in the transmission process of the cached downlink data, effectively improving the utilization efficiency of frequency spectrum, and meeting the communication requirement of 802.11 ax.
Here, the access point supporting the HEW function performs the CP period when transmitting the buffered downlink data to the plurality of stations supporting the HEW function.
In addition, when the access point does not support the HEW function, the access point may send the buffered downlink data to the station in a unicast manner, thereby ensuring that the buffered downlink data can be sent normally.
Therefore, according to the technical scheme of the invention, when the station supporting the HEW function is switched into the BSS supporting the HEW function from the BSS not supporting the HEW function, the access point can transmit the cached downlink data through the OFDMA technology; when a station supporting the HEW function is switched from a BSS supporting the HEW function to a BSS not supporting the HEW function, the access point may send the buffered downlink data to the station through an original TIM mechanism.
In a specific implementation, the receiving unit 702 may be a receiver or an antenna, etc., and the sending unit 704 may be a transmitter or an antenna, etc.
Fig. 8 shows a schematic block diagram of an access point according to an embodiment of the invention.
As shown in fig. 8, an access point 800 according to an embodiment of the present invention includes: such as communication device 700 of a wireless local area network shown in fig. 7.
In summary, the technical solution of the present invention mainly proposes that a station supporting an HEW function should have a dynamic switching function when receiving a downlink data frame buffered by an access point, and when connecting to a BSS that does not support the HEW function, the station supports the existing TIM mechanism; when the access point switches to the BSS supporting the HEW function, the access point may perform transmission of buffered downlink data through an OFDMA mechanism.
The method comprises the following specific steps:
1. and in the process of accessing the BSS, the station supporting the HEW function judges whether the BSS supports the HEW function or does not support the HEW function. Meanwhile, the station sends the capability value of supporting the HEW function to the AP. Specifically, the station may transmit its capability information value supporting the HEW function to the AP through a probe request frame or an association request frame.
The capability value supporting the HEW function may be in the form of IE (Information Element), and a specific format of the capability value is shown in fig. 9, where an Element ID may be 133 to indicate that a station supports the HEW function, and a value in an Information field indicates that the station supports OFDMA technology, MU MIMO (Multiple-Input Multiple-Output) and a mechanism for receiving and buffering downlink data thereof may be dynamically changed.
2. When the BSS accessed by the station supporting the HEW function also supports the HEW function, the access point and the station may transmit the buffered downlink data through an OFDMA mechanism.
Specifically, during the CP, the AP broadcasts TIM/DTIM information in a beacon frame, and groups stations that buffer downlink data and support OFDMA functions as needed to receive the number of the stations, and broadcasts the grouped information in the beacon frame.
The TIM/DTIM message is used to indicate to a plurality of stations supporting the OFDMA function that the access point has buffered downlink data to transmit within a specified time. Specifically, when the indication information is TIM information, the access point may separately indicate, in time, buffered downlink data for a station supporting the OFDMA function and a station not supporting the OFDMA function, for example, TIM information in a beacon frame generated by the access point at a first time point is used to indicate to the multiple stations that the access point has buffered downlink data to be transmitted in the first time period, and TIM information in a beacon frame generated at a second time point is used to indicate to the station not supporting the OFDMA function that the access point has buffered downlink data to be transmitted in the second time period; when the indication information is DTIM information, the access point may indicate, through the DTIM information, to a plurality of stations supporting the OFDMA function that the access point has downlink data to be sent, which is cached in the access point, within a specified time.
And then the AP sends an MU-RTS frame, the MU-RTS frame comprises resource block information distributed by the AP, and the station replies a CTS frame according to the resource block information distributed by the access point after receiving the MU-RTS frame. And after receiving the CTS frame replied by the station, the AP sends the cached downlink data to the station, and then the station replies a confirmation message frame to the AP through the resource block information distributed by the access point.
3. When the BSS accessed by the station supporting the HEW function does not support the HEW function, the access point and the station may transmit the buffered downlink data through the original TIM mechanism.
Specifically, the method comprises the following steps: the station in the PS state determines whether the AP has buffered downlink data by receiving a TIM message in a beacon frame, and if so, the station sends a PS-Poll to the AP in a contention manner during the CP period to obtain the downlink data, and the station is in the Awake state until receiving the downlink data during the CFP period.
The technical scheme of the present invention is described in detail above with reference to the accompanying drawings, and the present invention provides a new communication scheme for a wireless local area network, so that when a station supporting an HEW function accesses a basic service set supporting the HEW function, transmission of buffered downlink data can be performed between the access point and the station through an OFDMA technique, thereby effectively improving the utilization efficiency of a frequency spectrum and meeting the communication requirement of 802.11 ax.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A communication method for a wireless local area network, comprising:
generating a message frame, wherein the message frame comprises a capability identifier, and the capability identifier is used for indicating that a station supports an HEW function and indicating that an access point can send cached downlink data through an OFDMA technology;
transmitting the message frame to an access point;
the station is configured to perform the processing during a CP period when receiving the buffered downlink data sent by the access point.
2. The communication method of the wireless local area network according to claim 1, further comprising:
when accessing any basic service set, determining whether the any basic service set supports HEW function.
3. The method according to claim 1, wherein the message frame includes an information element name field, and the capability identifier is a value of the information element name field.
4. The communication method of the wireless local area network according to any one of claims 1 to 3, wherein the message frame is a probe request frame or an association request frame.
5. A communication method for a wireless local area network, comprising:
receiving a message frame sent by a station, wherein the message frame comprises a capability identifier, and the capability identifier is used for indicating that the station supports an HEW function and indicating that an access point can send cached downlink data through an OFDMA technology;
when the access point supports the HEW function, the cached downlink data is simultaneously sent to a plurality of sites supporting the HEW function through an OFDMA technology;
the station is configured to perform the processing during a CP period when receiving the buffered downlink data sent by the access point.
6. A communication apparatus of a wireless local area network, comprising:
a generating unit, configured to generate a message frame, where the message frame includes a capability identifier, where the capability identifier is used to indicate that a station supports an HEW function and indicate that an access point may send cached downlink data through an OFDMA technique;
a sending unit, configured to send the message frame to an access point;
the station is configured to perform the processing during a CP period when receiving the buffered downlink data sent by the access point.
7. The apparatus for communicating in a wireless local area network according to claim 6, further comprising:
a determining unit, configured to determine whether any basic service set supports HEW functionality when the station accesses into any basic service set.
8. A communication apparatus of a wireless local area network according to claim 6, wherein an information element name field is included in the message frame, and the capability identifier is a value of the information element name field.
9. Communication device of a wireless local area network according to any of claims 6 to 8, wherein the message frame is a probe request frame or an association request frame.
10. A communication apparatus of a wireless local area network, comprising:
a receiving unit, configured to receive a message frame sent by a station, where the message frame includes a capability identifier, where the capability identifier is used to indicate that the station supports an HEW function and indicate that an access point can send cached downlink data through an OFDMA technique;
a sending unit, configured to send the cached downlink data to multiple sites supporting the HEW function simultaneously through an OFDMA technique when the access point supports the HEW function;
the station is configured to perform the processing during a CP period when receiving the buffered downlink data sent by the access point.
11. A station, comprising: communication device of a wireless local area network according to any of claims 6 to 9.
12. An access point, comprising: communication device of a wireless local area network according to claim 10.
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| WO2023065360A1 (en) * | 2021-10-22 | 2023-04-27 | 北京小米移动软件有限公司 | Communication method and communication apparatus |
| WO2023077520A1 (en) * | 2021-11-08 | 2023-05-11 | 北京小米移动软件有限公司 | Wireless communication method and apparatus, device, and storage medium |
| CN114189502A (en) * | 2021-11-30 | 2022-03-15 | 中国电信股份有限公司 | Information sending method, device, storage medium and equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104185217A (en) * | 2014-05-09 | 2014-12-03 | 中兴通讯股份有限公司 | Parallel data transmission processing method and device |
| WO2015070439A1 (en) * | 2013-11-15 | 2015-05-21 | 华为技术有限公司 | Station access management device and method for wireless local area network |
| CN111030957A (en) * | 2014-05-09 | 2020-04-17 | 华为技术有限公司 | System and method for orthogonal frequency division multiple access communication |
-
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015070439A1 (en) * | 2013-11-15 | 2015-05-21 | 华为技术有限公司 | Station access management device and method for wireless local area network |
| CN104185217A (en) * | 2014-05-09 | 2014-12-03 | 中兴通讯股份有限公司 | Parallel data transmission processing method and device |
| CN111030957A (en) * | 2014-05-09 | 2020-04-17 | 华为技术有限公司 | System and method for orthogonal frequency division multiple access communication |
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