CN108513340B - Wireless local area network communication method and communication device, station and access point - Google Patents

Wireless local area network communication method and communication device, station and access point Download PDF

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CN108513340B
CN108513340B CN201710103912.5A CN201710103912A CN108513340B CN 108513340 B CN108513340 B CN 108513340B CN 201710103912 A CN201710103912 A CN 201710103912A CN 108513340 B CN108513340 B CN 108513340B
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frame
multicast
message frame
downlink data
communication interface
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CN108513340A (en
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董贤东
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Meizu Technology Co Ltd
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Meizu Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a wireless local area network communication method, a communication device, a station and an access point. The wireless local area network communication method is used for a station and comprises the following steps: receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to the TIM information in the beacon frame of the sender of the multicast/broadcast wakeup message frame to obtain the buffered downlink data frame. Through the technical scheme of the invention, the WUR and the 802.11ax can be better compatible, the requirements of the WUR are met, and the waste of resources is reduced.

Description

Wireless local area network communication method and communication device, station and access point
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a wireless local area network communication method and a wireless local area network communication device, and also to a station and an access point.
Background
In 2016, 7 months, 802.11 establishes a research group WUR (wake Up receiver) of the next generation Wi-Fi technology, and is mainly applied to the aspect of the Internet of things, and the problem of saving the power consumption of equipment to the greatest extent is solved. In the following discussion of sg (study group), it is proposed that the WUR frame is a control signaling frame, and the WUR function needs to be compatible with 802.11ax, considering that OFDMA technology is used in 802.11ax, and a resource allocation message frame is used to allocate uplink resources to each STAs, in order to enable WUR to be better compatible with 802.11ax, there is a document that a process of waking up STAs by the WUR frame under the condition of multiple users is proposed, but no specific specification is made on the format of the WUR control frame.
However, in order to make the WUR better meet the requirements of 802.11ax, the format of the WUR control frame needs to be defined. Therefore, how to define the format of the multicast or broadcast frame of the wake up frame becomes a problem to be solved at present.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art or the related art.
To this end, an object of the present invention is to provide a wireless local area network communication method.
Another object of the present invention is to provide a wireless lan communication apparatus.
It is a further object of the invention to propose a station.
It is a further object of the invention to propose an access point.
In view of this, the present invention provides a wireless local area network communication method, for a station, including: receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (Traffic Indication Map, data pending Indication) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the buffered downlink data frame.
According to the wireless local area network communication method, Stations (STAs) receive multicast or broadcast wakeup message frames and analyze the wakeup message frames, when the condition that a sender of the multicast or broadcast wakeup message frames caches downlink data frames is analyzed, a main communication interface of equipment is awakened so as to receive the cached downlink data frames, and when the main communication interface of the equipment receives the cached downlink data frames, TIM information in beacon frames of the sender of the multicast/broadcast wakeup message frames does not need to be intercepted, so that the TIM and 802.11ax can be better compatible, the requirements of the WUR are met, and the waste of resources is reduced.
In addition, the wireless local area network communication method according to the present invention may further include the following additional technical features:
in the above technical solution, preferably, the method further includes: before a main communication interface of the device receives the cached downlink data frame, a resource allocation message frame sent by a multicast/broadcast wakeup message frame sending party is received, and the resource allocation message frame allocates frequency spectrum resources for the cached downlink data frame.
In the technical scheme, before a main communication interface of the device receives a downlink data frame cached by a multicast or broadcast wakeup message frame sender, a resource allocation message frame sent by the multicast or broadcast wakeup message frame sender is received, and the resource allocation message frame comprises spectrum resources allocated to a plurality of sites, so that the interference among channels is avoided, the possibility of collision is reduced, and the data transmission efficiency is improved.
In any of the above aspects, preferably, the method further comprises: the main communication interface of the device sends a ps (power saving) -Poll power saving polling frame to the sender of the multicast/broadcast wakeup message frame according to the resource allocation message frame so as to obtain the buffered downlink data frame.
In the technical scheme, after the station receives the resource allocation message frame, the main communication interface of the device sends a PS-Poll frame to complete one communication between the station and the sender of the multicast or broadcast wakeup message frame, and notifies the sender of the multicast or broadcast wakeup message frame that the data receiving preparation is ready, so as to obtain the previously buffered downlink data frame from the AP.
The invention also provides a wireless local area network communication method, which is used for the access point and comprises the following steps: generating a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of a receiver device of the multicast/broadcast wakeup message frame, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM (traffic Indication map) message mapped by the buffered downlink data frame of the receiver to "0" in the Beacon (Beacon) frame or does not need to set the corresponding bit in the TIM of the receiver, indicating that the receiver does not have the buffered downlink data frame.
According to the wireless local area network communication method, an Access Point (AP) generates a multicast or broadcast wakeup message frame for waking up a main communication interface of a receiver device of the multicast/broadcast wakeup message frame, so that the main communication interface of the receiver device obtains a cached downlink data frame from the AP, and a sender of the multicast/broadcast wakeup message frame sets a corresponding bit in a TIM message mapped by the cached downlink data frame of the receiver to be '0' in a beacon frame or does not need to set a bit corresponding to the receiver in the TIM, so that the main communication interface of the receiver device does not need to monitor TIM information in the beacon frame when receiving the downlink data frame cached by the AP, and the WUR and 802.11ax can be better compatible, the requirements of the WUR are met, and the waste of resources is reduced.
In addition, the wireless local area network communication method according to the present invention may further include the following additional technical features:
in the above technical solution, preferably, the method further includes: and generating a resource allocation message frame before a main communication interface of the equipment receives the cached downlink data frame, wherein the resource allocation message frame allocates frequency spectrum resources for the cached downlink data frame.
In the technical scheme, before a main communication interface of receiving side equipment receives a downlink data frame cached by a multicast or broadcast wakeup message frame sending side, a resource allocation message frame is generated, and the resource allocation message frame comprises spectrum resources allocated to a plurality of stations, so that the interference among channels is avoided, the possibility of collision is reduced, and the data transmission efficiency is improved.
In any of the above aspects, preferably, the method further comprises: the receiving device main communication interface sends PS (Power saving) -Poll power saving polling frame according to the resource allocation message frame, so as to send the buffered downlink data frame to the receiving party of the multicast/broadcast wake-up message frame.
In the technical scheme, a main communication interface of a receiving party device receiving the multicast/broadcast wakeup message frame by the AP completes one-time communication between the AP and the receiving party of the multicast/broadcast wakeup message frame according to a PS-Poll frame sent by a resource allocation message frame, and the receiving party obtaining the multicast/broadcast wakeup message frame is ready to receive data so as to send the cached downlink data frame to the receiving party of the multicast/broadcast wakeup message frame.
The present invention further provides a wireless local area network communication device, which is used for a station, and includes: a first receiving unit, configured to receive a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (traffic Indication map) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the cached downlink data frame.
According to the data frame sending device, Stations (STAs) receive the multicast or broadcast wakeup message frame and analyze the wakeup message frame, when the sender analyzing the multicast or broadcast wakeup message frame caches the downlink data frame, the main communication interface of the equipment is awakened so as to receive the cached downlink data frame, and when the main communication interface of the equipment receives the cached downlink data frame, the TIM information in the beacon frame of the sender analyzing the multicast/broadcast wakeup message frame is not needed to be intercepted, so that the TIM and 802.11ax can be better compatible, the requirement of the WUR is met, and the waste of resources is reduced.
In addition, the wireless lan communication apparatus according to the present invention may further include the following additional features:
in the above technical solution, preferably, the apparatus further includes: and a second receiving unit, configured to receive a resource allocation message frame sent by a multicast/broadcast wakeup message frame sender before the device main communication interface receives the cached downlink data frame, where the resource allocation message frame allocates a spectrum resource for the cached downlink data frame.
In the technical scheme, before a main communication interface of the device receives a downlink data frame cached by a multicast or broadcast wakeup message frame sender, a resource allocation message frame sent by the multicast or broadcast wakeup message frame sender is received, and the resource allocation message frame comprises spectrum resources allocated to a plurality of sites, so that the interference among channels is avoided, the possibility of collision is reduced, and the data transmission efficiency is improved.
In any of the above aspects, preferably, the apparatus further comprises: a sending unit, configured to send, by the device host communication interface, a ps (power saving) -Poll power saving polling frame to a sender of the multicast/broadcast wakeup message frame according to the resource allocation message frame, so as to obtain the buffered downlink data frame.
In the technical scheme, after the station receives the resource allocation message frame, the main communication interface of the device sends a PS-Poll frame to complete one communication between the station and the sender of the multicast or broadcast wakeup message frame, and notifies the sender of the multicast or broadcast wakeup message frame that the data receiving preparation is ready, so as to obtain the previously buffered downlink data frame from the AP.
The present invention further provides a wireless local area network communication device, for an access point, including: a first generating unit, configured to generate a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM (traffic Indication map) message mapped by the buffered downlink data frame of the receiver to "0" in the Beacon (Beacon) frame or does not need to set the corresponding bit in the TIM of the receiver, indicating that the receiver does not have the buffered downlink data frame.
According to the data frame transmitting device, an Access Point (AP) generates a multicast or broadcast wakeup message frame for waking up a main communication interface of a receiving device of the multicast/broadcast wakeup message frame, so that the main communication interface of the receiving device obtains a cached downlink data frame from the AP, and a transmitting party of the multicast/broadcast wakeup message frame sets a corresponding bit in a TIM message mapped by the cached downlink data frame of the receiving device to be '0' or does not need to set a bit corresponding to the receiving device in the TIM in the beacon frame, so that the main communication interface of the receiving device does not need to monitor TIM information in the beacon frame when receiving the downlink data frame cached by the AP, and the WUR and 802.11ax can be better compatible, the WUR requirement is met, and the waste of resources is reduced.
In addition, the wireless lan communication apparatus according to the present invention may further include the following additional features:
in the above technical solution, preferably, the apparatus further includes: and a second generating unit, configured to generate a resource allocation message frame before the buffered downlink data frame received by the device main communication interface, where the resource allocation message frame allocates a spectrum resource for the buffered downlink data frame.
In the technical scheme, before a main communication interface of receiving side equipment receives a downlink data frame cached by a multicast or broadcast wakeup message frame sending side, a resource allocation message frame is generated, and the resource allocation message frame comprises spectrum resources allocated to a plurality of stations, so that the interference among channels is avoided, the possibility of collision is reduced, and the data transmission efficiency is improved.
In any of the above technical solutions, preferably, the apparatus further includes: a receiving unit, configured to receive a ps (power saving) -Poll power saving polling frame sent by the device main communication interface according to the resource allocation message frame, so as to send the buffered downlink data frame to a receiving side of the multicast/broadcast wakeup message frame.
In the technical scheme, a main communication interface of a receiving party device receiving the multicast/broadcast wakeup message frame by the AP completes one-time communication between the AP and the receiving party of the multicast/broadcast wakeup message frame according to a PS-Poll frame sent by a resource allocation message frame, and the receiving party obtaining the multicast/broadcast wakeup message frame is ready to receive data so as to send the cached downlink data frame to the receiving party of the multicast/broadcast wakeup message frame.
The invention also provides a station, which comprises the wireless local area network communication device for the station in any embodiment. Therefore, the wireless lan communication apparatus for stations in any of the above embodiments has all technical effects, and will not be described herein again.
The invention also provides an access point, which comprises the wireless local area network communication device used for the access point in any embodiment. Therefore, the wireless lan communication apparatus for an access point in any of the above embodiments has all technical effects, which are not described herein again.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1a is a flow chart of a wlan communication method for a station according to an embodiment of the present invention;
fig. 1b is a flow chart of a wireless local area network communication method for a station according to another embodiment of the present invention;
fig. 1c is a flow chart of a wireless local area network communication method for a station according to another embodiment of the present invention;
fig. 2a is a flow chart of a wlan communication method for an access point according to an embodiment of the present invention;
fig. 2b is a flow chart of a wireless local area network communication method for an access point according to another embodiment of the present invention;
fig. 2c is a flow chart of a wireless local area network communication method for an access point according to another embodiment of the present invention;
fig. 3a shows a schematic block diagram of a wireless local area network communication device for a station according to an embodiment of the present invention;
fig. 3b shows a schematic block diagram of a wireless local area network communication device for a station according to another embodiment of the present invention;
fig. 3c shows a schematic block diagram of a wireless local area network communication device for a station according to yet another embodiment of the present invention;
fig. 4a shows a schematic block diagram of a wireless local area network communication device for an access point according to an embodiment of the present invention;
fig. 4b shows a schematic block diagram of a wireless local area network communication device for an access point according to another embodiment of the present invention;
fig. 4c shows a schematic block diagram of a wireless local area network communication device for an access point according to a further embodiment of the present invention;
FIG. 5 shows a schematic block diagram of a site of an embodiment of the invention;
FIG. 6 shows a schematic block diagram of an access point of an embodiment of the present invention;
fig. 7 shows an interaction diagram of a station and an access point 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.
As shown in fig. 1a, a flowchart of a wlan communication method for a station according to an embodiment of the present invention is shown: the method comprises the following steps:
102, receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (Traffic Indication Map, data pending Indication) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the buffered downlink data frame.
In this embodiment, the secondary communication interface of The Station (STAs) receives the multicast or broadcast wakeup message frame, and parses the wakeup message frame, and when the sender of the multicast or broadcast wakeup message frame is parsed to buffer the downlink data frame, the primary communication interface of the device is woken up to receive the buffered downlink data frame, and when the primary communication interface of the device receives the buffered downlink data frame, it is not necessary to listen to the beacon information in the beacon frame of the sender of the multicast/broadcast wakeup message frame, so that the WUR and the TIM 802.11ax can be better compatible, which not only meets the requirements of the WUR, but also reduces the waste of resources.
The secondary communication interface is only used for receiving the wake-up frame, the primary communication interface is used for normal data communication of the device, and the transmission power of the wake-up frame is much lower than that of the normal frame, generally 1mW (milliwatt).
The communication channel for transmitting the wake-up frame and the communication channel for transmitting the normal data frame may be the same, such as a normal 20MHz channel, or may be different, such as the normal data frame is transmitted in a 20MHz channel, and the wake-up frame is transmitted in a channel that does not overlap with the normal data frame.
The secondary communication interface and the primary communication interface may be the same physical entity, but logically separated, or may be different physical entities, for example, they may be a receiver or an antenna.
Wherein the site may be a smartphone, tablet or PDA like device.
As shown in fig. 1b, a flowchart of a wlan communication method for a station according to another embodiment of the present invention is shown: the method comprises the following steps:
102, receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (temporal Indication Map, data to be transmitted Indication) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain a cached downlink data frame;
if the device receives the buffered downlink data frame through the primary communication interface, the buffered downlink data frame does not need to be received by supporting a TIM mechanism, where the TIM mechanism is a TIM information element carried in a Beacon frame broadcast by the AP, and if a bit corresponding to an AID of the TIM information element is set to "1", the TIM mechanism indicates that the device has the buffered downlink data frame and needs to access a channel in a contention period to obtain downlink data in a contention mode.
Step 104, before the main communication interface of the device receives the cached downlink data frame, receiving a resource allocation message frame sent by a multicast/broadcast wakeup message frame sender, where the resource allocation message frame allocates spectrum resources for the cached downlink data frame.
The resource allocation message frame is used for allocating communication resources to multiple STAs, and specifically, the resource allocation message frame is used for allocating spectrum resources for transmitting uplink PS-Poll frames and receiving buffered downlink data to STAs.
In this embodiment, before a main communication interface of a device receives a downlink data frame buffered by a multicast or broadcast wakeup message frame sender, a resource allocation message frame sent by the multicast or broadcast wakeup message frame sender is received, where the resource allocation message frame includes spectrum resources allocated to multiple sites, so as to avoid interference between channels, reduce the possibility of collision, and improve the efficiency of data transmission.
As shown in fig. 1c, a flowchart of a wlan communication method for a station according to another embodiment of the present invention is shown: the method comprises the following steps:
102, receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (temporal Indication Map, data to be transmitted Indication) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain a cached downlink data frame;
step 104, before a main communication interface of the device receives the cached downlink data frame, receiving a resource allocation message frame sent by a multicast/broadcast wakeup message frame sender, wherein the resource allocation message frame allocates spectrum resources for the cached downlink data frame;
step 106, the main communication interface of the device sends a ps (power saving) -Poll power saving polling frame to the sender of the multicast/broadcast wakeup message frame according to the resource allocation message frame so as to obtain the buffered downlink data frame.
In this embodiment, after the station receives the resource allocation message frame, the primary communication interface of the device sends a PS-Poll frame to complete one communication between the station and the sender of the multicast or broadcast wakeup message frame, and notifies the sender of the multicast or broadcast wakeup message frame that the preparation for receiving data is ready, so as to obtain the previously buffered downlink data frame from the AP.
As shown in fig. 2a, a flow chart of a wlan communication method for an access point according to an embodiment of the present invention is shown: the method comprises the following steps:
step 202, generating a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, where the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM (traffic Indication map) message mapped by the buffered downlink data frame of the receiver to "0" in the Beacon (Beacon) frame or does not need to set the corresponding bit in the TIM of the receiver, indicating that the receiver does not have the buffered downlink data frame.
In this embodiment, an Access Point (AP) generates a multicast or broadcast wakeup message frame for waking up a host communication interface of a receiver device of the multicast/broadcast wakeup message frame, so that the host communication interface of the receiver device obtains a buffered downlink data frame from the AP, and a sender of the multicast/broadcast wakeup message frame sets a corresponding bit in a TIM message mapped by the buffered downlink data frame of the receiver to "0" in a beacon frame or does not need to set a bit corresponding to the receiver in the TIM, so that when the host communication interface of the receiver device receives the downlink data frame buffered by the AP, it is not necessary to listen to the TIM information in the beacon frame, so that the WUR can be better compatible with 802.11ax, which not only meets the requirements of the WUR, but also reduces the waste of resources.
The secondary communication interface of the receiving device is only used for receiving the wake-up frame, the primary communication interface is used for normal data communication of the device, and the transmission power of the wake-up frame is much lower than that of the normal frame, generally 1mW (milliwatt).
The communication channel for transmitting the wake-up frame and the communication channel for transmitting the normal data frame may be the same, such as a normal 20MHz channel, or may be different, such as the normal data frame is transmitted in a 20MHz channel, and the wake-up frame is transmitted in a channel that does not overlap with the normal data frame.
Where the access point may be a router or the like.
As shown in fig. 2b, a flowchart of a wlan communication method for an access point according to another embodiment of the present invention is shown: the method comprises the following steps:
step 202, generating a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, where the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wake-up message frame sets the corresponding bit in the TIM message mapped by the buffer downlink data frame of the receiver to '0' in the Beacon (Beacon) frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver has no buffer downlink data frame;
if the receiving-side device receives the buffered downlink data frame through the primary communication interface, the buffered downlink data frame does not need to be received by supporting a TIM mechanism, where the TIM mechanism refers to a TIM information element carried in a Beacon frame broadcast by an AP, and if a bit corresponding to an AID of the TIM information element is set to "1", the TIM mechanism indicates that the receiving-side device has the buffered downlink data frame and needs to access a channel in a contention period to obtain downlink data in a contention mode.
The fact that the access point does not need to set the bit corresponding to the receiver in the TIM means that the bit corresponding to the receiver AID is set to a predetermined reserved value, such as "0", although the reserved value may also be set to "1".
Step 204, before the main communication interface of the device receives the buffered downlink data frame, a resource allocation message frame is generated, and the resource allocation message frame allocates spectrum resources for the buffered downlink data frame.
The resource allocation message frame is used for allocating communication resources to multiple STAs, and specifically, the resource allocation message frame is used for allocating spectrum resources for transmitting uplink PS-Poll frames and receiving buffered downlink data to STAs.
In this embodiment, before the main communication interface of the receiver device receives the downlink data frame buffered by the multicast or broadcast wakeup message frame sender, a resource allocation message frame is generated, where the resource allocation message frame includes spectrum resources allocated to multiple stations, so as to avoid interference between channels, reduce the possibility of collision, and improve the efficiency of data transmission.
As shown in fig. 2c, a flowchart of a wlan communication method for an access point according to another embodiment of the present invention is shown: the method comprises the following steps:
step 202, generating a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, where the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wake-up message frame sets the corresponding bit in the TIM message mapped by the buffer downlink data frame of the receiver to '0' in the Beacon (Beacon) frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver has no buffer downlink data frame;
step 204, before the main communication interface of the device receives the cached downlink data frame, generating a resource allocation message frame, wherein the resource allocation message frame allocates frequency spectrum resources for the cached downlink data frame;
step 206, receiving the ps (power saving) -Poll power saving polling frame sent by the device main communication interface according to the resource allocation message frame, so as to send the buffered downlink data frame to the receiver of the multicast/broadcast wakeup message frame.
In this embodiment, the AP receives a PS-Poll frame sent by a main communication interface of a multicast/broadcast wakeup message frame receiver device according to a resource allocation message frame, completes one communication between the AP and the multicast/broadcast wakeup message frame receiver, and learns that the multicast/broadcast wakeup message frame receiver is ready to receive data, so as to send a buffered downlink data frame to the multicast/broadcast wakeup message frame receiver.
As shown in fig. 3a, a schematic block diagram of a wireless local area network communication device for a station according to an embodiment of the present invention: the device includes:
a first receiving unit 302, configured to receive a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the main communication interface of the device does not listen to TIM (traffic Indication map) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the cached downlink data frame.
In this embodiment, the secondary communication interface of The Station (STAs) receives the multicast or broadcast wakeup message frame, and parses the wakeup message frame, and when the sender of the multicast or broadcast wakeup message frame is parsed to buffer the downlink data frame, the primary communication interface of the device is woken up to receive the buffered downlink data frame, and when the primary communication interface of the device receives the buffered downlink data frame, it is not necessary to listen to the beacon information in the beacon frame of the sender of the multicast/broadcast wakeup message frame, so that the WUR and the TIM 802.11ax can be better compatible, which not only meets the requirements of the WUR, but also reduces the waste of resources.
The secondary communication interface is only used for receiving the wake-up frame, the primary communication interface is used for normal data communication of the device, and the transmission power of the wake-up frame is much lower than that of the normal frame, generally 1mW (milliwatt).
The communication channel for transmitting the wake-up frame and the communication channel for transmitting the normal data frame may be the same, such as a normal 20MHz channel, or may be different, such as the normal data frame is transmitted in a 20MHz channel, and the wake-up frame is transmitted in a channel that does not overlap with the normal data frame.
The secondary communication interface and the primary communication interface may be the same physical entity, but logically separated, or may be different physical entities, for example, they may be a receiver or an antenna.
Wherein the site may be a smartphone, tablet or PDA like device.
As shown in fig. 3b, a schematic block diagram of a wireless local area network communication device for a station according to another embodiment of the present invention: the device includes:
a first receiving unit 302, configured to receive a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; the main communication interface of the device does not monitor TIM (traffic Indication map) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain a cached downlink data frame;
if the device receives the buffered downlink data frame through the primary communication interface, the buffered downlink data frame does not need to be received by supporting a TIM mechanism, where the TIM mechanism is a TIM information element carried in a Beacon frame broadcast by the AP, and if a bit corresponding to an AID of the TIM information element is set to "1", the TIM mechanism indicates that the device has the buffered downlink data frame and needs to access a channel in a contention period to obtain downlink data in a contention mode.
A second receiving unit 304, configured to receive a resource allocation message frame sent by a sender of a multicast/broadcast wakeup message frame before a device primary communication interface receives a cached downlink data frame, where the resource allocation message frame allocates a spectrum resource for the cached downlink data frame.
The resource allocation message frame is used for allocating communication resources to multiple STAs, and specifically, the resource allocation message frame is used for allocating spectrum resources for transmitting uplink PS-Poll frames and receiving buffered downlink data to STAs. In this embodiment, before a main communication interface of a device receives a downlink data frame buffered by a multicast or broadcast wakeup message frame sender, a resource allocation message frame sent by the multicast or broadcast wakeup message frame sender is received, where the resource allocation message frame includes spectrum resources allocated to multiple sites, so as to avoid interference between channels, reduce the possibility of collision, and improve the efficiency of data transmission.
As shown in fig. 3c, a schematic block diagram of a wireless local area network communication device for a station according to another embodiment of the present invention: the device includes:
a first receiving unit 302, configured to receive a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; the main communication interface of the device does not monitor TIM (traffic Indication map) information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain a cached downlink data frame;
a second receiving unit 304, configured to receive a resource allocation message frame sent by a multicast/broadcast wakeup message frame sender before the device primary communication interface receives the cached downlink data frame, where the resource allocation message frame allocates a spectrum resource for the cached downlink data frame;
a sending unit 306, configured to send, by the device host communication interface, a ps (power saving) -Poll power saving polling frame to a sender of the multicast/broadcast wakeup message frame according to the resource allocation message frame, so as to obtain the buffered downlink data frame.
In this embodiment, after the station receives the resource allocation message frame, the primary communication interface of the device sends a PS-Poll frame to complete one communication between the station and the sender of the multicast or broadcast wakeup message frame, and notifies the sender of the multicast or broadcast wakeup message frame that the preparation for receiving data is ready, so as to obtain the previously buffered downlink data frame from the AP.
In a specific implementation, the receiving units 302 and 304 may be receivers or antennas, and the transmitting unit 306 may be a transmitter or an antenna.
As shown in fig. 4a, a schematic block diagram of a wireless local area network communication device for an access point according to another embodiment of the present invention: the device includes:
a first generating unit 402, configured to generate a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM (traffic Indication map) message mapped by the buffered downlink data frame of the receiver to "0" in the Beacon (Beacon) frame or does not need to set the corresponding bit in the TIM of the receiver, indicating that the receiver does not have the buffered downlink data frame.
In this embodiment, an Access Point (AP) generates a multicast or broadcast wakeup message frame for waking up a host communication interface of a receiver device of the multicast/broadcast wakeup message frame, so that the host communication interface of the receiver device obtains a buffered downlink data frame from the AP, and a sender of the multicast/broadcast wakeup message frame sets a corresponding bit in a TIM message mapped by the buffered downlink data frame of the receiver to "0" in a beacon frame or does not need to set a bit corresponding to the receiver in the TIM, so that when the host communication interface of the receiver device receives the downlink data frame buffered by the AP, it is not necessary to listen to the TIM information in the beacon frame, so that the WUR can be better compatible with 802.11ax, which not only meets the requirements of the WUR, but also reduces the waste of resources.
The secondary communication interface of the receiving device is only used for receiving the wake-up frame, the primary communication interface is used for normal data communication of the device, and the transmission power of the wake-up frame is much lower than that of the normal frame, generally 1mW (milliwatt).
The communication channel for transmitting the wake-up frame and the communication channel for transmitting the normal data frame may be the same, such as a normal 20MHz channel, or may be different, such as the normal data frame is transmitted in a 20MHz channel, and the wake-up frame is transmitted in a channel that does not overlap with the normal data frame.
Where the access point may be a router or the like.
As shown in fig. 4b, a schematic block diagram of a wireless local area network communication device for an access point according to another embodiment of the present invention: the device includes:
a first generating unit 402, configured to generate a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wake-up message frame sets the corresponding bit in the TIM message mapped by the buffer downlink data frame of the receiver to '0' in the Beacon (Beacon) frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver has no buffer downlink data frame;
if the receiving-side device receives the buffered downlink data frame through the primary communication interface, the buffered downlink data frame does not need to be received by supporting a TIM mechanism, where the TIM mechanism refers to a TIM information element carried in a Beacon frame broadcast by an AP, and if a bit corresponding to an AID of the TIM information element is set to "1", the TIM mechanism indicates that the receiving-side device has the buffered downlink data frame and needs to access a channel in a contention period to obtain downlink data in a contention mode.
The fact that the access point does not need to set the bit corresponding to the receiver in the TIM means that the bit corresponding to the receiver AID is set to a predetermined reserved value, such as "0", although the reserved value may also be set to "1".
A second generating unit 404, configured to generate a resource allocation message frame before the buffered downlink data frame received by the device primary communication interface, where the resource allocation message frame allocates a spectrum resource for the buffered downlink data frame.
The resource allocation message frame is used for allocating communication resources to multiple STAs, and specifically, the resource allocation message frame is used for allocating spectrum resources for transmitting uplink PS-Poll frames and receiving buffered downlink data to STAs. In this embodiment, before the main communication interface of the receiver device receives the downlink data frame buffered by the multicast or broadcast wakeup message frame sender, a resource allocation message frame is generated, where the resource allocation message frame includes spectrum resources allocated to multiple stations, so as to avoid interference between channels, reduce the possibility of collision, and improve the efficiency of data transmission.
As shown in fig. 4c, a schematic block diagram of a wireless local area network communication device for an access point according to another embodiment of the present invention: the device includes:
a first generating unit 402, configured to generate a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame; and the sender of the multicast/broadcast wake-up message frame sets the corresponding bit in the TIM message mapped by the buffer downlink data frame of the receiver to '0' in the Beacon (Beacon) frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver has no buffer downlink data frame;
a second generating unit 404, configured to generate a resource allocation message frame before the buffered downlink data frame received by the device host communication interface, where the resource allocation message frame allocates spectrum resources for the buffered downlink data frame
A receiving unit 406, configured to receive a ps (power saving) -Poll power saving polling frame sent by the device host communication interface according to the resource allocation message frame, so as to send the buffered downlink data frame to a receiving side of the multicast/broadcast wakeup message frame.
In this embodiment, the AP receives a PS-Poll frame sent by a main communication interface of a multicast/broadcast wakeup message frame receiver device according to a resource allocation message frame, completes one communication between the AP and the multicast/broadcast wakeup message frame receiver, and learns that the multicast/broadcast wakeup message frame receiver is ready to receive data, so as to send a buffered downlink data frame to the multicast/broadcast wakeup message frame receiver.
In a specific implementation, the generating units 402 and 404 may be a signal processor, a central processing unit, or a baseband processor, and the receiving unit 406 may be a receiver or an antenna.
As shown in fig. 5, a schematic block diagram of a station according to an embodiment of the present invention: station 500 includes a wireless local area network communication device 502 for a station in any of the embodiments described above. Therefore, the wireless lan communication apparatus 502 for stations in any of the above embodiments has all the technical effects, and will not be described herein again.
As shown in fig. 6, a schematic block diagram of an access point according to an embodiment of the present invention: the access point 600 comprises a wireless local area network communication device 602 for the access point in any of the embodiments described above. Therefore, the wireless lan communication apparatus 602 for an access point in any of the above embodiments has all technical effects, which are not described herein again.
In the specific embodiment, the wireless lan includes an AP, and a plurality of stations, such as STA1, STA2, STA3, and the like, and defines a multicast format of a wake up frame, so that the multicast format can be better compatible with 802.11ax, as shown in fig. 7:
step 1, the AP sends a Multicast wake up frame (Multicast WUR) to STAs, where in the wake up frame, a corresponding bit in a TIM message mapped by a buffered downlink data frame of a receiver is set to "1", which indicates that the AP has downlink data buffered for the STAs, and in addition, the AP may have a Multicast address for receiving the data frame by the buffered data STAs in the wake up frame;
step 2, the AP sends a resource allocation message frame (trigger frame) to the STAs according to the multicast address in the wake up frame, and notifies the STAs of the resource for sending the Poll frame and receiving the downlink data of the STAs in the resource allocation message frame;
step 3, after the STAs receive the WUR frame, analyzing the WUR frame information, and if the downlink data cached by the AP is analyzed, waking up the main communication equipment;
and 4, the STAs sends a polling frame (WUR-Poll) and receives the Buffered downlink data (Buffered downlink data) according to the received resource allocation message frame.
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 (14)

1. A wireless local area network communication method for a station, comprising:
receiving a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of equipment, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame;
and the main communication interface of the device does not listen to TIM information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the cached downlink data frame.
2. The wireless local area network communication method of claim 1, further comprising:
and before the main communication interface of the equipment receives the cached downlink data frame, receiving a resource allocation message frame sent by the multicast/broadcast wakeup message frame sending party, wherein the resource allocation message frame allocates frequency spectrum resources for the cached downlink data frame.
3. The wireless local area network communication method of claim 2, further comprising:
and the main communication interface of the equipment sends a PS-Poll power-saving polling frame to a sender of the multicast/broadcast wakeup message frame according to the resource allocation message frame so as to obtain the cached downlink data frame.
4. A wireless local area network communication method for an access point, comprising:
generating a multicast/broadcast wakeup message frame, wherein the wakeup message frame is used for waking up a main communication interface of a receiver device of the multicast/broadcast wakeup message frame, and the main communication interface is used for receiving a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame;
and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM message mapped by the buffered downlink data frame of the receiver to be '0' in the beacon frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver does not have the buffered downlink data frame.
5. The wireless local area network communication method of claim 4, further comprising:
generating a resource allocation message frame before the device main communication interface receives the cached downlink data frame, wherein the resource allocation message frame allocates spectrum resources for the cached downlink data frame.
6. The wireless local area network communication method of claim 5, further comprising:
and receiving a PS-Poll power-saving polling frame sent by the main communication interface of the equipment according to the resource allocation message frame so as to send the cached downlink data frame to a receiver of the multicast/broadcast wakeup message frame.
7. A wireless local area network communication apparatus for a station, comprising:
a first receiving unit, configured to receive a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame;
and the main communication interface of the device does not listen to TIM information in a beacon frame of a sender of the multicast/broadcast wakeup message frame to obtain the cached downlink data frame.
8. The wireless local area network communication device of claim 7, further comprising:
a second receiving unit, configured to receive a resource allocation message frame sent by the multicast/broadcast wakeup message frame sender before the device main communication interface receives the cached downlink data frame, where the resource allocation message frame allocates a spectrum resource for the cached downlink data frame.
9. The wireless local area network communication device of claim 8, further comprising:
and the sending unit is used for sending a PS-Poll power-saving polling frame to a sender of the multicast/broadcast wakeup message frame by the equipment main communication interface according to the resource allocation message frame so as to obtain the cached downlink data frame.
10. A wireless local area network communication device for an access point, comprising:
a first generating unit, configured to generate a multicast/broadcast wakeup message frame, where the wakeup message frame is used to wake up a main communication interface of a device of a receiver of the multicast/broadcast wakeup message frame, and the main communication interface is used to receive a downlink data frame cached by a sender of the multicast/broadcast wakeup message frame;
and the sender of the multicast/broadcast wakeup message frame sets the corresponding bit in the TIM message mapped by the buffered downlink data frame of the receiver to be '0' in the beacon frame or does not need to set the corresponding bit of the receiver in the TIM, which indicates that the receiver does not have the buffered downlink data frame.
11. The wireless local area network communication device of claim 10, further comprising:
a second generating unit, configured to generate a resource allocation message frame before the device primary communication interface receives the cached downlink data frame, where the resource allocation message frame allocates spectrum resources for the cached downlink data frame.
12. The wireless local area network communication device of claim 11, further comprising:
and the receiving unit is used for receiving the PS-Poll power-saving polling frame sent by the equipment main communication interface according to the resource allocation message frame so as to send the cached downlink data frame to a receiving party of the multicast/broadcast wakeup message frame.
13. A station, characterized in that it comprises a wireless local area network communication device according to any one of claims 7 to 9.
14. An access point, characterized in that it comprises a wireless local area network communication device according to any one of claims 10 to 12.
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