CN109699061B - Communication method and communication device, access point equipment and station equipment - Google Patents
Communication method and communication device, access point equipment and station equipment Download PDFInfo
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- CN109699061B CN109699061B CN201710985904.8A CN201710985904A CN109699061B CN 109699061 B CN109699061 B CN 109699061B CN 201710985904 A CN201710985904 A CN 201710985904A CN 109699061 B CN109699061 B CN 109699061B
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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
- H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- 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
Abstract
The invention provides a communication method and a communication device of a wireless local area network, access point equipment and station equipment, wherein the communication method of the wireless local area network for the access point equipment comprises the following steps: generating a wake-up message frame, wherein the wake-up message frame comprises a time synchronization field; determining the transmission rate of the wake-up message frame; setting the field length of the time synchronization field according to the transmission rate; and sending a wake-up message frame to the station equipment according to the transmission rate so as to wake up a main communication interface of the station equipment and enable the station equipment to keep time synchronization with the access point equipment according to the field length. By the technical scheme of the invention, the station equipment and the access point equipment can keep time synchronization, and meanwhile, the equipment can save more power and meet the requirements of IEEE802.11 ba.
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, an access point device, and a station device.
Background
In the year 2016, 7, IEEE (Institute of Electrical and Electronics Engineers) 802.11 established a research group WUR (wake Up receiver) of the next generation Wi-Fi (Wireless Fidelity) technology, namely IEEE802.11ba, which is mainly applied in the aspect of internet of things, in order to save the power consumption of devices as much as possible, and most mainly in order to make devices receiving wake-Up frames (wake-Up message frames, namely WUR message frames) save the power consumption of devices as much as possible, wherein the power consumption required by the devices to receive the wake-Up frames is not more than 1 mW.
When the device is in the WUR mode, the primary communication interface of the device is in a sleep state, and the secondary communication interface of the device is in a continuously awake state (i.e., an active state) or a periodic sleep state, where the secondary communication interface is used to receive a WUR message frame sent by an AP (Access Point), so as to wake up the primary communication interface to acquire a downlink data frame cached by the AP for the device.
In order to make the device comply with the requirement of ieee802.11ba and further save power, the requirement on the length of the WUR message frame is very strict, as shown in fig. 1, the WUR message frame mainly includes: LSTF (Legacy Short Training Field), LLTF (Legacy Long Training Field), LSIG (Legacy Signal Field), BPSK Symbol (Binary Phase Shift Keying Symbol) Field, SYNC Field (time synchronization Field), and Data Field. However, when the wake-up message frames are transmitted at different transmission rates, whether the field lengths of the SYNC fields are the same length or different lengths is not specified.
Therefore, how to define the field lengths of the SYNC fields at different transmission rates so that the station device can keep time synchronization with the access point device and the device can save more power is a technical problem to be solved urgently.
Disclosure of Invention
The present invention is based on at least one of the above technical problems, and provides a new communication scheme for a wireless local area network, in which when wakeup message frames are sent at different transmission rates, by setting time synchronization fields contained in the wakeup message frames to have different field lengths, a station device can keep time synchronization with an access point device, and at the same time, the device can save more power, and the requirements of IEEE802.11ba are met.
In view of this, according to a first aspect of the present invention, a communication method of a wireless local area network is provided, where the communication method of the wireless local area network is used for an access point device, and includes: generating a wake-up message frame, wherein the wake-up message frame comprises a time synchronization field; determining the transmission rate of the wake-up message frame; setting the field length of the time synchronization field according to the transmission rate; and sending a wake-up message frame to the station equipment according to the transmission rate so as to wake up a main communication interface of the station equipment and enable the station equipment to keep time synchronization with the access point equipment according to the field length.
In the technical scheme, when a wake-up message frame needs to be sent to the station device to wake up a main communication interface of the station device to receive downlink data buffered by the access point device, in order to enable the station device receiving the wake-up message frame to keep time synchronization with the access device, time synchronization fields included in the wake-up message frame may be set to have different field lengths according to different transmission rates of the wake-up message frame, so that the device can save more power, and the requirement of IEEE802.11ba is met.
In the foregoing technical solution, preferably, the transmission rate includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is greater than a value of the second transmission rate, and the step of setting the field length of the time synchronization field according to the transmission rate specifically includes: and setting the length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than the length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate.
In the technical scheme, the transmission rate for sending the wake-up message frame to the site device generally includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is relatively large, and when the field length of the time synchronization field is set according to the transmission rate of the wake-up message frame, a longer field length is set correspondingly according to the larger transmission rate, so that the site device receiving the wake-up message frame can keep time synchronization with the access device.
Further, in the above technical solution, a length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate may be preferably four times a length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in any of the above technical solutions, the time synchronization field in the wake-up message frame is included in a MAC (Media Access Control) frame header of the wake-up message frame, which is different from the time synchronization field included in the data field portion of the wake-up message frame in the prior art.
In any of the above technical solutions, preferably, the step of setting the field length of the time synchronization field according to the transmission rate further includes: acquiring the working state of a secondary communication interface of the station equipment, wherein the working state comprises the following steps: a continuously awake state and a periodic sleep state; and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic dormant state.
In this solution, in order to further enable the station device to maintain time synchronization with the access device, the field length can be set by comprehensively considering the current working state of the secondary communication interface of the station equipment, then, in the process of setting the field length of the time synchronization field according to the transmission rate of the wake-up message frame, if the wake-up message frame is transmitted at the first transmission rate or the second transmission rate, the field length corresponding to the time synchronization field is shorter when the secondary communication interface of the station device is in the continuously awake state relative to the field length corresponding to the time synchronization field when the secondary communication interface of the station device is in the periodically sleep state, the secondary communication interface of the station equipment is used for receiving the wake-up message frame, the continuous wake-up state indicates that the secondary communication interface of the station equipment is always in the wake-up state, and the periodic sleep state indicates that the secondary communication interface of the station equipment wakes up according to a set period to monitor the wake-up message frame; through the technical scheme, the equipment can further save more electricity, and the requirement of IEEE802.11ba is met.
Further, in the above technical solution, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the working state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which may be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device may add an identifier, such as an identifier with one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
According to the second aspect of the present invention, there is also provided a communication apparatus of a wireless local area network, for an access point device, the communication apparatus of the wireless local area network including: the generation module is used for generating a wake-up message frame, and the wake-up message frame comprises a time synchronization field; the determining module is used for determining the transmission rate of the wake-up message frame; the setting module is used for setting the field length of the time synchronization field according to the transmission rate; and the sending module is used for sending the wake-up message frame to the site equipment according to the transmission rate so as to wake up a main communication interface of the site equipment and enable the site equipment to keep time synchronization with the access point equipment according to the field length.
In the technical scheme, when a wake-up message frame needs to be sent to the station device to wake up a main communication interface of the station device to receive downlink data buffered by the access point device, in order to enable the station device receiving the wake-up message frame to keep time synchronization with the access device, time synchronization fields included in the wake-up message frame may be set to have different field lengths according to different transmission rates of the wake-up message frame, so that the device can save more power, and the requirement of IEEE802.11ba is met.
In the foregoing technical solution, preferably, the transmission rate includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is greater than a value of the second transmission rate, and the setting module is specifically configured to: and setting the length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than the length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate.
In the technical scheme, the transmission rate for sending the wake-up message frame to the site device generally includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is relatively large, and when the field length of the time synchronization field is set according to the transmission rate of the wake-up message frame, a longer field length is set correspondingly according to the larger transmission rate, so that the site device receiving the wake-up message frame can keep time synchronization with the access device.
Further, in the above technical solution, a length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate may be preferably four times a length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in any of the above technical solutions, the time synchronization field in the wake-up message frame is included in the MAC frame header of the wake-up message frame, which is different from the time synchronization field included in the data field part of the wake-up message frame in the prior art.
In any of the above technical solutions, preferably, the communication apparatus of the wireless local area network further includes: the acquisition module is used for acquiring the working state of the secondary communication interface of the site equipment in the process of setting the field length of the time synchronization field according to the transmission rate by the setting module, wherein the working state comprises the following steps: a continuously awake state and a periodic sleep state; and the setting module is specifically configured to: and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic dormant state.
In this technical solution, in order to further enable the station device to maintain time synchronization with the access device, a field length of a secondary communication interface of the station device may be set by comprehensively considering a current operating state of the secondary communication interface, and if the wake-up message frame is sent at a first transmission rate or a second transmission rate in a process of setting a field length of a time synchronization field of the wake-up message frame according to a transmission rate of the wake-up message frame, when the secondary communication interface of the station device is in a continuous wake-up state, the field length corresponding to the time synchronization field is shorter than the field length corresponding to the time synchronization field when the secondary communication interface of the station device is in a periodic sleep state, where the secondary communication interface of the station device is configured to receive the wake-up message frame; through the technical scheme, the equipment can be further more power-saving, and the requirements of IEEE802.11ba are met.
Further, in the above technical solution, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the working state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which may be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device may add an identifier, such as an identifier with one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
According to a third aspect of the present invention, an access point device is further provided, which includes the communication apparatus of the wireless local area network in any one of the above-mentioned technical solutions of the second aspect, so that the access point device has the same technical effects as the communication apparatus of the wireless local area network in any one of the above-mentioned technical solutions of the second aspect, and details are not repeated here.
According to the fourth aspect of the present invention, there is also provided a communication method of a wireless local area network, where the communication method of the wireless local area network is used for a station device, and includes: receiving a wake-up message frame sent by access point equipment, wherein the wake-up message frame comprises a time synchronization field, and the field length of the time synchronization field is set by the access point equipment according to the transmission rate of the wake-up message frame; and awakening the main communication interface of the station equipment according to the awakening message frame, and keeping time synchronization with the access point equipment according to the field length.
In the technical scheme, when the station equipment receives a wake-up message frame sent by the access point equipment, the station equipment can wake up a main communication interface of the station equipment according to the wake-up message frame to acquire downlink data cached by the access point equipment for the access point equipment, and meanwhile, the synchronization on the time is kept between the main communication interface and the access point equipment according to the field length of a time synchronization field contained in the wake-up message frame, wherein the field length of the time synchronization field in the wake-up message frame is set according to the transmission rate adopted by the access point equipment to send the wake-up message frame, so that the station equipment can keep the synchronization on the time with the access point equipment under the conditions of ensuring that the equipment is more power-saving and meeting the requirements of IEEE802.11 ba; the station device receives the wake-up message frame through the second communication interface.
Further, in the above technical solution, the time synchronization field in the wake-up message frame is included in the MAC frame header of the wake-up message frame, which is different from the time synchronization field included in the data field part of the wake-up message frame in the prior art.
Further, in any of the above technical solutions, before the primary communication interface enters the awake mode (i.e., awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which may be divided into two states, that is, the secondary communication interface is always in the awake state (i.e., continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device may add an identifier, such as an identifier with one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
According to the fifth aspect of the present invention, there is further provided a communication apparatus of a wireless local area network, where the communication apparatus of the wireless local area network is used for a station device, and the communication apparatus of the wireless local area network includes: the receiving module is used for receiving a wake-up message frame sent by the access point equipment, wherein the wake-up message frame comprises a time synchronization field, and the field length of the time synchronization field is set by the access point equipment according to the transmission rate of the wake-up message frame; and the processing module is used for awakening the main communication interface of the site equipment according to the awakening message frame and keeping time synchronization with the access point equipment according to the length of the field.
In the technical scheme, when the station equipment receives a wake-up message frame sent by the access point equipment, the station equipment can wake up a main communication interface of the station equipment according to the wake-up message frame to acquire downlink data cached by the access point equipment for the access point equipment, and meanwhile, the synchronization on the time is kept between the main communication interface and the access point equipment according to the field length of a time synchronization field contained in the wake-up message frame, wherein the field length of the time synchronization field in the wake-up message frame is set according to the transmission rate adopted by the access point equipment to send the wake-up message frame, so that the station equipment can keep the synchronization on the time with the access point equipment under the conditions of ensuring that the equipment is more power-saving and meeting the requirements of IEEE802.11 ba; the station device receives the wake-up message frame through the second communication interface.
Further, in the above technical solution, the time synchronization field in the wake-up message frame is included in the MAC frame header of the wake-up message frame, which is different from the time synchronization field included in the data field part of the wake-up message frame in the prior art.
Further, in any of the above technical solutions, before the primary communication interface enters the awake mode (i.e., awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which may be divided into two states, that is, the secondary communication interface is always in the awake state (i.e., continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device may add an identifier, such as an identifier with one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
According to a sixth aspect of the present invention, a station device is further provided, which includes the communication apparatus of the wireless local area network in any one of the above-mentioned technical solutions of the fifth aspect, so that the station device has the same technical effects as the communication apparatus of the wireless local area network in any one of the above-mentioned technical solutions of the fifth aspect, and details thereof are omitted here.
Through the technical scheme of the invention, when the wake-up message frame is sent at different transmission rates, the time synchronization field contained in the wake-up message frame is set to have different field lengths correspondingly, so that the station equipment and the access point equipment can keep time synchronization, the equipment can save more power, and the requirements of IEEE802.11ba are met.
Drawings
Fig. 1 shows a frame format diagram of a wake-up message frame;
fig. 2 is a flowchart illustrating a communication method for a wireless lan of an ap device according to an embodiment of the present invention;
fig. 3 shows a schematic block diagram of a communication apparatus of a wireless local area network for an access point device according to an embodiment of the present invention;
fig. 4 shows a schematic block diagram of an access point device of an embodiment of the invention;
fig. 5 is a flowchart illustrating a communication method for a wireless local area network of a station device according to an embodiment of the present invention;
fig. 6 shows a schematic block diagram of a communication apparatus of a wireless local area network for a station device of an embodiment of the present invention;
fig. 7 shows a schematic block diagram of a station apparatus of 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. 2 is a flowchart illustrating a communication method for a wireless lan of an access point device according to an embodiment of the present invention.
As shown in fig. 2, a communication method of a wireless local area network according to an embodiment of the present invention is used for an access point device, and the communication method of the wireless local area network includes:
And step 208, sending the wake-up message frame to the station equipment according to the transmission rate so as to wake up the main communication interface of the station equipment and enable the station equipment to keep time synchronization with the access point equipment according to the field length.
In this embodiment, when a wake-up message frame needs to be sent to the station device to wake up a main communication interface of the station device to receive downlink data buffered by the access point device, in order to enable the station device that receives the wake-up message frame to keep time synchronization with the access device, specifically, the time synchronization fields included in the wake-up message frame may be set to have different field lengths according to different transmission rates of the wake-up message frame, so that the device can save more power, and the requirement of IEEE802.11ba is met.
Further, in the above embodiment, the transmission rate includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is greater than a value of the second transmission rate, step 206 may specifically be performed as the following steps: and setting the length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than the length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate.
In this embodiment, the transmission rate for sending the wake-up message frame to the station device generally includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is relatively large, and when the field length of the time synchronization field is set according to the transmission rate of the wake-up message frame, a longer field length is set correspondingly according to the larger transmission rate, so that the station device receiving the wake-up message frame can maintain time synchronization with the access device.
Further, in the above embodiment, the first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate may preferably be four times as long as the second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in the above-mentioned embodiment, the time synchronization field in the wake-up message frame is included in the MAC header of the wake-up message frame, which is different from the time synchronization field included in the data field portion of the wake-up message frame in the related art.
Further, in the above embodiment, step 206 further includes: acquiring the working state of a secondary communication interface of the station equipment, wherein the working state comprises the following steps: a continuously awake state and a periodic sleep state; and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic dormant state.
In this embodiment, in order to further enable the station device to maintain time synchronization with the access device, a field length may be set in consideration of a current operating state of a secondary communication interface of the station device, and in a process of setting a field length of a time synchronization field of the station device according to a transmission rate of a wakeup message frame, if the wakeup message frame is sent at a first transmission rate or a second transmission rate, when the secondary communication interface of the station device is in a continuously awake state, the field length corresponding to the time synchronization field is shorter than the field length corresponding to the time synchronization field when the secondary communication interface of the station device is in a periodically sleep state, where the secondary communication interface of the station device is configured to receive the wakeup message frame; through the technical scheme, the equipment can further save more electricity, and the requirement of IEEE802.11ba is met.
Further, in the above embodiment, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which can be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device can identify, for example, by one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
The main execution body of the communication method shown in fig. 2 is an access point device in a network formed by an access point device and a station device, such as a router or a server with a Wi-Fi interface.
Fig. 3 shows a schematic block diagram of a communication apparatus of a wireless local area network for an access point device according to an embodiment of the present invention.
As shown in fig. 3, a communication apparatus 30 of a wireless local area network according to an embodiment of the present invention is used for an access point device, and the communication apparatus 30 of the wireless local area network includes: a generation module 302, a determination module 304, a setup module 306, and a transmission module 308.
The generating module 302 is configured to generate a wakeup message frame, where the wakeup message frame includes a time synchronization field; the determining module 304 is configured to determine a transmission rate of the wake-up message frame; the setting module 306 is configured to set a field length of the time synchronization field according to the transmission rate; the sending module 308 is configured to send a wake-up message frame to the station device according to the transmission rate, so as to wake up the main communication interface of the station device and keep the station device synchronized with the access point device in time according to the field length.
In this embodiment, when a wake-up message frame needs to be sent to the station device to wake up a main communication interface of the station device to receive downlink data buffered by the access point device, in order to enable the station device that receives the wake-up message frame to keep time synchronization with the access device, specifically, the time synchronization fields included in the wake-up message frame may be set to have different field lengths according to different transmission rates of the wake-up message frame, so that the device can save more power, and the requirement of IEEE802.11ba is met.
Further, in the above embodiment, the transmission rate includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is greater than a value of the second transmission rate, and the setting module 306 is specifically configured to: and setting the length of a first field corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than the length of a second field corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate.
In this embodiment, the transmission rate for sending the wake-up message frame to the station device generally includes a first transmission rate and a second transmission rate, where a value of the first transmission rate is relatively large, and when the field length of the time synchronization field is set according to the transmission rate of the wake-up message frame, a longer field length is set correspondingly according to the larger transmission rate, so that the station device receiving the wake-up message frame can maintain time synchronization with the access device.
Further, in the above embodiment, the first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate may preferably be four times as long as the second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in the above-mentioned embodiment, the time synchronization field in the wake-up message frame is included in the MAC header of the wake-up message frame, which is different from the time synchronization field included in the data field portion of the wake-up message frame in the related art.
Further, in the above embodiment, as shown in fig. 3, the communication device 30 of the wireless local area network further includes: an obtaining module 310, configured to obtain, in the process that the setting module 306 sets the field length of the time synchronization field according to the transmission rate, a working state of the secondary communication interface of the station device, where the working state includes: a continuously awake state and a periodic sleep state; and the setting module 306 is specifically configured to: and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic dormant state.
In this embodiment, in order to further enable the station device to maintain time synchronization with the access device, a field length may be set in consideration of a current operating state of a secondary communication interface of the station device, and in a process of setting a field length of a time synchronization field of the station device according to a transmission rate of a wakeup message frame, if the wakeup message frame is sent at a first transmission rate or a second transmission rate, when the secondary communication interface of the station device is in a continuously awake state, the field length corresponding to the time synchronization field is shorter than the field length corresponding to the time synchronization field when the secondary communication interface of the station device is in a periodically sleep state, where the secondary communication interface of the station device is configured to receive the wakeup message frame; through the technical scheme, the equipment can further save more electricity, and the requirement of IEEE802.11ba is met.
Further, in the above embodiment, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which can be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device can identify, for example, by one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
In a specific implementation, the generating module 302, the determining module 304, the setting module 306, and the obtaining module 310 may be a central processor or a baseband processor, etc.; the sending module 308 may be a transmitter or an antenna, etc.
Fig. 4 shows a schematic block diagram of an access point device of an embodiment of the invention.
As shown in fig. 4, the access point device 40 according to the embodiment of the present invention includes the communication apparatus 30 of the wireless lan described in the above embodiment, and therefore, the access point device 40 has the same technical effect as the communication apparatus 30 of the wireless lan described in the above embodiment, and is not described again here.
Fig. 5 is a flowchart illustrating a communication method for a wireless local area network of a station device according to an embodiment of the present invention.
As shown in fig. 5, a communication method of a wireless local area network according to an embodiment of the present invention is used for a station device, and the communication method of the wireless local area network includes the following steps:
And step 504, waking up the main communication interface of the station equipment according to the wake-up message frame, and keeping time synchronization with the access point equipment according to the field length.
In this embodiment, when the station device receives a wake-up message frame sent by the access point device, the station device may wake up a main communication interface of the station device according to the wake-up message frame to obtain downlink data cached by the access point device, and simultaneously maintain time synchronization with the access point device according to a field length of a time synchronization field included in the wake-up message frame, where the field length of the time synchronization field in the wake-up message frame is set according to a transmission rate used by the access point device to send the wake-up message frame, so that the station device can maintain time synchronization with the access point device under the condition that the device is ensured to be more power-saving and the requirement of IEEE802.11ba is met; the station device receives the wake-up message frame through the second communication interface.
Further, in the above embodiment, the transmission rate of the wake-up message frame includes generally a first transmission rate and a second transmission rate, where the value of the first transmission rate is relatively large, and the first field length of the time synchronization field corresponding to the first transmission rate is greater than the first field length of the time synchronization field corresponding to the second transmission rate, specifically, the first field length may be four times as long as the second field length, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in the above embodiment, in the process of setting the field length of the time synchronization field included in the wake-up message frame according to the transmission rate thereof, for the same transmission rate, when the secondary communication interface of the station apparatus is in the continuous wake-up state, the field length corresponding to the time synchronization field is smaller than the field length corresponding to the time synchronization field when the secondary communication interface of the station apparatus is in the periodic sleep state.
Further, in the above-mentioned embodiment, the time synchronization field in the wake-up message frame is included in the MAC header of the wake-up message frame, which is different from the time synchronization field included in the data field portion of the wake-up message frame in the related art.
Further, in the above embodiment, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which can be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device can identify, for example, by one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
The main body of the communication method shown in fig. 5 may be a station device in a network formed by an ap device and a station device, such as a smart phone or a PDA (Personal Digital Assistant).
The interface through which the station device receives the wakeup message frame is a secondary communication interface, and the purpose of receiving the wakeup message frame is to wake up a primary communication interface of the station device to perform communication so as to obtain a downlink data frame buffered by the access point device.
Fig. 6 shows a schematic block diagram of a communication apparatus of a wireless local area network for a station device according to an embodiment of the present invention.
As shown in fig. 6, a communication apparatus 60 of a wireless local area network according to an embodiment of the present invention is used for a station device, and the communication apparatus 60 of the wireless local area network includes: a receiving module 602 and a processing module 604.
The receiving module 602 is configured to receive a wakeup message frame sent by an access point device, where the wakeup message frame includes a time synchronization field, where a field length of the time synchronization field is set by the access point device according to a transmission rate of the wakeup message frame; the processing module 604 is configured to wake up the primary communication interface of the station device according to the wake-up message frame, and maintain time synchronization with the access point device according to the field length.
In this embodiment, when the station device receives a wake-up message frame sent by the access point device, the station device may wake up a main communication interface of the station device according to the wake-up message frame to obtain downlink data cached by the access point device, and simultaneously maintain time synchronization with the access point device according to a field length of a time synchronization field included in the wake-up message frame, where the field length of the time synchronization field in the wake-up message frame is set according to a transmission rate used by the access point device to send the wake-up message frame, so that the station device can maintain time synchronization with the access point device under the condition that the device is ensured to be more power-saving and the requirement of IEEE802.11ba is met; the station device receives the wake-up message frame through the second communication interface.
Further, in the above embodiment, the transmission rate of the wake-up message frame includes generally a first transmission rate and a second transmission rate, where the value of the first transmission rate is relatively large, and the first field length of the time synchronization field corresponding to the first transmission rate is greater than the first field length of the time synchronization field corresponding to the second transmission rate, specifically, the first field length may be four times as long as the second field length, where the first transmission rate may be 250kb/s, and the second transmission rate may be 62.5 kb/s; of course the first field length may also be other multiples of the second field length.
Further, in the above embodiment, in the process of setting the field length of the time synchronization field included in the wake-up message frame according to the transmission rate thereof, for the same transmission rate, when the secondary communication interface of the station apparatus is in the continuous wake-up state, the field length corresponding to the time synchronization field is smaller than the field length corresponding to the time synchronization field when the secondary communication interface of the station apparatus is in the periodic sleep state.
Further, in the above-mentioned embodiment, the time synchronization field in the wake-up message frame is included in the MAC header of the wake-up message frame, which is different from the time synchronization field included in the data field portion of the wake-up message frame in the related art.
Further, in the above embodiment, before the primary communication interface enters the awake mode (i.e. awake state), the station device negotiates with the access point device the operating state of the secondary communication interface in the primary communication channel (channel for receiving buffered downlink data frames), which can be divided into two states, that is, the secondary communication interface is always in the awake state (i.e. continuously awake state) and the secondary communication interface is in the periodic sleep state, and for the two states, the station device can identify, for example, by one bit, in the WUR mode request frame: "0" indicates that the secondary communication interface is in a continuously awake state; a "1" indicates that the secondary communication interface is in a periodic sleep state.
In a specific implementation, the receiving module 602 may be a receiver or an antenna, etc.; the processing module 604 may be a central processor or a baseband processor, etc.
Fig. 7 shows a schematic block diagram of a station apparatus of an embodiment of the present invention.
As shown in fig. 7, the station device 70 according to the embodiment of the present invention includes the communication apparatus 60 of the wireless local area network described in the foregoing embodiment, and therefore, the station device 70 has the same technical effect as the communication apparatus 60 of the wireless local area network described in the foregoing embodiment, and is not described again here.
In the technical solution of the present invention, when the wake-up message frame is sent at different transmission rates, the time synchronization field included in the wake-up message frame is set to have different field lengths, so that the station device can keep time synchronization with the access point device, and meanwhile, the device can save more power, and meet the requirement of IEEE802.11 ba.
In the description of the present specification, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and specific meanings of the above terms in the disclosed embodiments may be understood according to specific situations by those of ordinary skill in the art.
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 (8)
1. A communication method of a wireless local area network, which is used for an access point device, wherein the communication method of the wireless local area network comprises:
generating a wake-up message frame, wherein the wake-up message frame comprises a time synchronization field;
determining a transmission rate of the wake-up message frame;
setting the field length of the time synchronization field according to the transmission rate;
sending the wake-up message frame to the site equipment according to the transmission rate so as to wake up a main communication interface of the site equipment and enable the site equipment to keep time synchronization with the access point equipment according to the field length;
the transmission rates include a first transmission rate and a second transmission rate, wherein a value of the first transmission rate is greater than a value of the second transmission rate, an
The step of setting the field length of the time synchronization field according to the transmission rate specifically includes:
setting a first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than a second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate;
the time synchronization field in the wake-up message frame is contained in a MAC header of the wake-up message frame.
2. The method for communicating in a wireless local area network according to claim 1, wherein the step of setting the field length of the time synchronization field according to the transmission rate further comprises:
acquiring the working state of a secondary communication interface of the station equipment, wherein the working state comprises the following steps: a continuously awake state and a periodic sleep state;
and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic sleep state.
3. A communication method of a wireless local area network, which is used for a station device, and is characterized in that the communication method of the wireless local area network comprises:
receiving a wake-up message frame sent by an access point device, wherein the wake-up message frame comprises a time synchronization field,
the field length of the time synchronization field is set by the access point device according to the transmission rate of the wake-up message frame;
awakening a main communication interface of the site equipment according to the awakening message frame, and keeping time synchronization with the access point equipment according to the field length;
the transmission rate includes a first transmission rate and a second transmission rate, wherein a value of the first transmission rate is greater than a value of the second transmission rate, and the setting module is specifically configured to: setting a first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than a second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate;
the time synchronization field in the wake-up message frame is contained in a MAC header of the wake-up message frame.
4. A communication apparatus of a wireless local area network, configured to be used in an access point device, the communication apparatus of the wireless local area network comprising:
a generating module, configured to generate a wake-up message frame, where the wake-up message frame includes a time synchronization field;
a determining module, configured to determine a transmission rate of the wake-up message frame;
the setting module is used for setting the field length of the time synchronization field according to the transmission rate;
a sending module, configured to send the wake-up message frame to a site device according to the transmission rate, so as to wake up a main communication interface of the site device and keep time synchronization between the site device and the access point device according to the length of the field;
the transmission rates include a first transmission rate and a second transmission rate, wherein a value of the first transmission rate is greater than a value of the second transmission rate, an
The setting module is specifically configured to:
setting a first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than a second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate;
the time synchronization field in the wake-up message frame is contained in a MAC header of the wake-up message frame.
5. The apparatus for communicating in a wireless local area network according to claim 4, further comprising:
an obtaining module, configured to obtain a working state of a secondary communication interface of the station device in a process in which the setting module sets the field length of the time synchronization field according to the transmission rate, where the working state includes: a continuously awake state and a periodic sleep state; and
the setting module is specifically configured to:
and for the same transmission rate, setting the length of a third field corresponding to the time synchronization field when the secondary communication interface is in a continuous awakening state to be smaller than the length of a fourth field corresponding to the time synchronization field when the secondary communication interface is in a periodic sleep state.
6. A communication apparatus of a wireless local area network, for a station device, the communication apparatus of the wireless local area network comprising:
a receiving module, configured to receive a wake-up message frame sent by an access point device, where the wake-up message frame includes a time synchronization field,
the field length of the time synchronization field is set by the access point device according to the transmission rate of the wake-up message frame;
a processing module, configured to wake up a main communication interface of the station device according to the wake-up message frame, and keep time synchronization with the access point device according to the length of the field;
the transmission rate includes a first transmission rate and a second transmission rate, wherein a value of the first transmission rate is greater than a value of the second transmission rate, and the setting module is specifically configured to: setting a first field length corresponding to the time synchronization field when the wake-up message frame is sent according to the first transmission rate to be larger than a second field length corresponding to the time synchronization field when the wake-up message frame is sent according to the second transmission rate;
the time synchronization field in the wake-up message frame is contained in a MAC header of the wake-up message frame.
7. An access point device, comprising: communication device of a wireless local area network according to claim 4 or 5.
8. A station apparatus, comprising: communication device of a wireless local area network according to claim 6.
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