CN108076466B - Communication method, communication device and communication equipment of wireless local area network - Google Patents
Communication method, communication device and communication equipment of wireless local area network Download PDFInfo
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- CN108076466B CN108076466B CN201611020971.8A CN201611020971A CN108076466B CN 108076466 B CN108076466 B CN 108076466B CN 201611020971 A CN201611020971 A CN 201611020971A CN 108076466 B CN108076466 B CN 108076466B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
Abstract
The invention provides a communication method, a communication device and communication equipment of a wireless local area network, wherein the communication method of the wireless local area network comprises the following steps: generating a wake-up frame for waking up a data frame receiver of a device into a wake-up state to receive a data frame; determining the frequency spectrum resource for sending the wake-up frame, wherein the frequency spectrum resource for sending the wake-up frame is not overlapped with the frequency spectrum resource occupied by a main communication channel, and the bandwidth of the frequency spectrum resource for sending the wake-up frame is smaller than the bandwidth of the main communication channel; transmitting the wake-up frame based on the determined spectrum resources. The technical scheme of the invention ensures that the transmission of the wake-up frame does not cause interference to the main communication channel, thereby avoiding the occurrence of communication conflict, being beneficial to improving the frequency spectrum efficiency and meeting the requirements of WUR.
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, and a communication device.
Background
In 2016, 7 months, 802.11 has established a research group wur (wake Up receiver) of a next-generation Wi-Fi (Wireless Fidelity) technology, which is mainly applied to the aspect of internet of things and aims to save the power consumption of equipment as much as possible.
In the WUR research group, a Wake-up frame is defined, wherein a data frame receiver of a device may be in a sleep state, and when the Wake-up frame receiver of the device receives the Wake-up frame, the Wake-up frame receiver of the device wakes up the data frame receiver to perform normal communication (such as IEEE802.11 data communication or other signaling communication), and thus, the purpose of defining the Wake-up frame is to facilitate the device to save power consumption.
In the existing Wi-Fi application scenario, there is a lot of management information, such as beacon frames, and if the wake up frame is transmitted in the same channel as the beacon frame or in a channel overlapping with the spectrum resource occupied by the transmission channel of the beacon frame, the originally busy channel is more congested, and further information collision may be caused, resulting in waste of resources.
Disclosure of Invention
Based on at least one of the above technical problems, the present invention provides a new communication scheme for a wireless local area network, so that the sending of the wakeup frame does not interfere with the main communication channel, thereby avoiding the occurrence of communication collision, facilitating the improvement of spectrum efficiency, and satisfying the requirements of WUR.
In view of the above, according to a first aspect of the present invention, a communication method of a wireless local area network is provided, including: generating a wake-up frame for waking up a data frame receiver of a device into a wake-up state to receive a data frame; determining the frequency spectrum resource for sending the wake-up frame, wherein the frequency spectrum resource for sending the wake-up frame is not overlapped with the frequency spectrum resource occupied by a main communication channel, and the bandwidth of the frequency spectrum resource for sending the wake-up frame is smaller than the bandwidth of the main communication channel; transmitting the wake-up frame based on the determined spectrum resources.
In the technical scheme, the awakening frame is sent by adopting the frequency spectrum resource which is not overlapped with the frequency spectrum resource occupied by the main communication channel, and the bandwidth of the frequency spectrum resource for sending the awakening frame is smaller than that of the main communication channel, so that the sending of the awakening frame cannot cause interference to the main communication channel, further, the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirement of WUR is met. The data frame is an IEEE802.11 data frame, the wakeup frame is a wake up frame, the transmission power of the wake up frame is much lower than that of the IEEE802.11 data frame, and the wake up frame may be a management frame.
The overlapping of the spectrum resources indicates that the spectrum resources transmitted by the data frame and the WUR frame are partially overlapped or completely overlapped, and the non-overlapping indicates that the two situations can not occur.
Meanwhile, the receiver for receiving the wake-up frame and the data frame can be the same physical entity, is only logically separated, and controls the working state of the receiver by using different internal operation instructions; in addition, the receiver for receiving the wake-up frame and the data frame may also be two physical entities, and a communication interface exists between the wake-up frame receiver and the data frame receiver, and after the wake-up frame receiver receives the wake-up frame, the wake-up frame receiver sends a wake-up instruction to the data frame receiver through the communication interface to wake up the data frame receiver for communication.
The primary communication channel is a channel for performing IEEE802.11 data communication or other signaling communication, and may be a communication channel for transmitting a beacon frame, a probe response frame, or the like.
In the above technical solution, preferably, the step of determining the frequency spectrum resource for sending the wakeup frame specifically includes:
detecting whether the basic service sets are overlapped;
if the mobile terminal is not in the overlapped basic service set, selecting to send the frequency spectrum resource of the wake-up frame out of the frequency spectrum resources occupied by the main communication channel in the current basic service set;
and if the frequency spectrum resources are in the overlapped basic service set, selecting the frequency spectrum resources for sending the wake-up frame out of the frequency spectrum resources occupied by the main communication channels of the plurality of basic service sets forming the overlapped basic service set.
In the technical scheme, the overlapped basic Service set is an obss (overlapping base Service set), and when a sender of the wakeup frame is not in the overlapped basic Service set, the frequency spectrum resource occupied by the main communication channel in the current basic Service set can be considered only when selecting the frequency spectrum resource for sending the wakeup frame; when the sender of the wake-up frame is in the OBSS, spectrum resources occupied by main communication channels of a plurality of basic service sets forming the OBSS need to be considered, so as to ensure that the main communication channels of the plurality of basic service sets are not interfered when the wake-up frame is sent through the selected spectrum resources.
Further, whether the communication frame is in the overlapped basic service set or not is determined according to the value of the BSS color carried in the physical frame header of the received communication frame.
Wherein, the value of the BSS color indicates the identity of the base station, and the function is to distinguish the data of the BSS from the data of other BSSs.
In any of the above technical solutions, preferably, the communication method of the wireless local area network further includes: and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
In the technical solution, a communication process exists between a sender of an awake frame and a receiver of the awake frame before sending the awake frame, for example, an AP (Access Point) has communicated with an STA (Station ) before sending the awake frame to the STA (Station) (including sending a beacon frame, receiving a probe request frame, sending a probe response frame, and the like), and this communication process is completed through a main communication channel, so that a spectrum resource occupied by a main communication channel can be determined according to a historical communication situation between the sender of the awake frame and the receiver of the awake frame.
According to the second aspect of the present invention, there is also provided a communication method for a wireless local area network, including: receiving a wake-up frame, wherein the wake-up frame is used for waking up a data frame receiver of a device to enter a wake-up state to receive the data frame, a frequency spectrum resource occupied by the wake-up frame during transmission is not overlapped with a frequency spectrum resource occupied by a main communication channel, and a bandwidth of the frequency spectrum resource occupied by the wake-up frame during transmission is smaller than a bandwidth of the main communication channel; and after receiving the wake-up frame, waking up the data frame receiver to enter a wake-up state.
In the technical scheme, the frequency spectrum resources occupied by the wakeup frame during transmission are not overlapped with the frequency spectrum resources occupied by the main communication channel, and the bandwidth of the frequency spectrum resources occupied by the wakeup frame during transmission is smaller than that of the main communication channel, so that the wakeup frame does not interfere with the main communication channel during transmission, further the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of WUR are met.
According to the third aspect of the present invention, there is further provided a communication apparatus for a wireless local area network, including: a generating unit, configured to generate a wake-up frame, where the wake-up frame is used to wake up a data frame receiver of a device to enter a wake-up state to receive a data frame; the processing unit is used for determining the frequency spectrum resource for sending the wake-up frame, wherein the frequency spectrum resource for sending the wake-up frame is not overlapped with the frequency spectrum resource occupied by a main communication channel, and the bandwidth of the frequency spectrum resource for sending the wake-up frame is smaller than that of the main communication channel; a sending unit, configured to send the wakeup frame based on the spectrum resource determined by the processing unit.
In the technical scheme, the awakening frame is sent by adopting the frequency spectrum resource which is not overlapped with the frequency spectrum resource occupied by the main communication channel, and the bandwidth of the frequency spectrum resource for sending the awakening frame is smaller than that of the main communication channel, so that the sending of the awakening frame cannot cause interference to the main communication channel, further, the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirement of WUR is met. The data frame is an IEEE802.11 data frame, the wakeup frame is a wake up frame, and the transmission power of the wake up frame is much lower than that of the IEEE802.11 data frame.
Meanwhile, the receiver for receiving the wake-up frame and the data frame can be the same physical entity, is only logically separated, and controls the working state of the receiver by using different internal operation instructions; in addition, the receiver for receiving the wake-up frame and the data frame may also be two physical entities, and a communication interface exists between the wake-up frame receiver and the data frame receiver, and after the wake-up frame receiver receives the wake-up frame, the wake-up frame receiver sends a wake-up instruction to the data frame receiver through the communication interface to wake up the data frame receiver for communication.
The primary communication channel is a channel for performing IEEE802.11 data communication or other signaling communication, and may be a communication channel for transmitting a beacon frame, a probe response frame, or the like.
In the above technical solution, preferably, the processing unit includes: a detecting unit, configured to detect whether a sender of the wakeup frame is in an overlapped basic service set;
a selecting unit, configured to select, when the detecting unit detects that the sender is not in an overlapped basic service set, a spectrum resource for sending the wakeup frame outside a spectrum resource occupied by a main communication channel in the basic service set where the sender is currently located, an
And when the detection unit detects that the sender is in an overlapped basic service set, selecting the frequency spectrum resource for sending the wake-up frame out of the frequency spectrum resources occupied by the main communication channels of a plurality of basic service sets forming the overlapped basic service set.
In the technical scheme, the overlapped basic service set is the OBSS, and when a sender of the wake-up frame is not in the overlapped basic service set, the frequency spectrum resource used for sending the wake-up frame can be selected only by considering the frequency spectrum resource occupied by the main communication channel in the current basic service set; when the sender of the wake-up frame is in the OBSS, spectrum resources occupied by main communication channels of a plurality of basic service sets forming the OBSS need to be considered, so as to ensure that the main communication channels of the plurality of basic service sets are not interfered when the wake-up frame is sent through the selected spectrum resources.
Further, the detection unit is specifically configured to: and determining whether the communication frame is in an overlapped basic service set or not according to the value of the BSS color carried in the physical frame header of the received communication frame.
Wherein, the value of the BSS color indicates the identity of the base station, and the function is to distinguish the data of the BSS from the data of other BSSs.
In any of the above technical solutions, preferably, the processing unit is further configured to: and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
In the technical scheme, a communication process exists between a sender of an awake frame and a receiver of the awake frame before sending the awake frame, for example, an AP has already communicated with an STA (including sending of a beacon frame, receiving of a probe request frame, sending of a probe response frame, and the like) before sending the awake frame to the STA, and the communication process is completed through a main communication channel, so that a spectrum resource occupied by the main communication channel can be determined according to a historical communication situation between the sender of the awake frame and the receiver of the awake frame.
According to the fourth aspect of the present invention, there is also provided a communication apparatus for a wireless local area network, including: a receiving unit, configured to receive a wakeup frame, where the wakeup frame is used to wake up a data frame receiver of a device to enter a wakeup state to receive a data frame, where a spectrum resource occupied by the wakeup frame during transmission is not overlapped with a spectrum resource occupied by a main communication channel, and a bandwidth of the spectrum resource occupied by the wakeup frame during transmission is smaller than a bandwidth of the main communication channel; and the processing unit is used for awakening the data frame receiver to enter an awakening state after the receiving unit receives the awakening frame.
In the technical scheme, the frequency spectrum resources occupied by the wakeup frame during transmission are not overlapped with the frequency spectrum resources occupied by the main communication channel, and the bandwidth of the frequency spectrum resources occupied by the wakeup frame during transmission is smaller than that of the main communication channel, so that the wakeup frame does not interfere with the main communication channel during transmission, further the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of WUR are met.
According to a fifth aspect of the present invention, there is also provided a communication device, comprising: communication means of a wireless local area network as described in the third aspect above; and/or a communication device of a wireless local area network as described in the fourth aspect above.
Through the technical scheme, the transmission of the wake-up frame cannot cause interference to a main communication channel, so that the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of the WUR are met.
Drawings
Fig. 1 is a flowchart illustrating a communication method of a wireless local area network according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a communication apparatus of a wireless local area network according to a first embodiment of the present invention;
fig. 3 is a flowchart illustrating a communication method of a wireless lan according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a communication apparatus of a wireless local area network according to a second embodiment of the present invention;
fig. 5 shows a schematic diagram of a channel occupancy according to a first embodiment of the present invention;
fig. 6 shows a schematic diagram of a channel occupation situation according to a second 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. 1 is a flowchart illustrating a communication method of a wireless local area network according to a first embodiment of the present invention.
As shown in fig. 1, a communication method of a wireless local area network according to a first embodiment of the present invention includes the following steps:
step S10, a wake-up frame is generated, where the wake-up frame is used to wake up a data frame receiver of the device to enter an awake state to receive a data frame.
The data frame is an IEEE802.11 data frame, the wakeup frame is a wake up frame, and the transmission power of the wake up frame is much lower than that of the IEEE802.11 data frame.
Meanwhile, the receiver for receiving the wake-up frame and the data frame can be the same physical entity, is only logically separated, and controls the working state of the receiver by using different internal operation instructions; in addition, the receiver for receiving the wake-up frame and the data frame may also be two physical entities, and a communication interface exists between the wake-up frame receiver and the data frame receiver, and after the wake-up frame receiver receives the wake-up frame, the wake-up frame receiver sends a wake-up instruction to the data frame receiver through the communication interface to wake up the data frame receiver for communication.
Step S12, determining a spectrum resource for sending the wakeup frame, where the spectrum resource for sending the wakeup frame is not overlapped with a spectrum resource occupied by a main communication channel, and a bandwidth of the spectrum resource for sending the wakeup frame is smaller than a bandwidth of the main communication channel. Such as: the bandwidth of the spectrum resource for transmitting the wakeup frame is 5MHz, and the bandwidth of the main communication channel (such as the channel for transmitting the data frame) is 20 MHz.
The primary communication channel refers to a channel for performing IEEE802.11 data communication or other signaling communication, and may be a communication channel for transmitting a beacon frame, a probe response frame, and the like. The overlapping of the spectrum resources means that the spectrum resources of the main communication channel and the transmitted wake-up frame are partially or completely overlapped, and the non-overlapping means that neither of the above two cases occurs. Such as: when the bandwidth of the frequency spectrum resource for sending the wakeup frame is 5MHz and the bandwidth of the main communication channel is 20MHz, the partial overlapping of the two indicates that the 5MHz frequency spectrum resource and the 20MHz frequency spectrum resource are partially overlapped; when the two are all overlapped, it means that the spectrum resource of 5MHz is in the spectrum resource range of 20 MHz.
Step S14, sending the wake-up frame based on the determined spectrum resource.
In the technical scheme shown in fig. 1, the wakeup frame is sent by using the frequency spectrum resource which is not overlapped with the frequency spectrum resource occupied by the main communication channel, and the bandwidth of the frequency spectrum resource for sending the wakeup frame is smaller than that of the main communication channel, so that the sending of the wakeup frame does not cause interference to the main communication channel, and further, the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of WUR can be met.
In an embodiment of the present invention, step S12 specifically includes:
detecting whether the basic service sets are overlapped;
if the mobile terminal is not in the overlapped basic service set, selecting to send the frequency spectrum resource of the wake-up frame out of the frequency spectrum resources occupied by the main communication channel in the current basic service set;
and if the frequency spectrum resources are in the overlapped basic service set, selecting the frequency spectrum resources for sending the wake-up frame out of the frequency spectrum resources occupied by the main communication channels of the plurality of basic service sets forming the overlapped basic service set.
In this embodiment, the overlapped basic service set is an OBSS, and when a sender of the wakeup frame is not in the overlapped basic service set, the spectrum resource occupied by the main communication channel in the current basic service set may only be considered when selecting the spectrum resource for sending the wakeup frame; when the sender of the wake-up frame is in the OBSS, spectrum resources occupied by main communication channels of a plurality of basic service sets forming the OBSS need to be considered, so as to ensure that the main communication channels of the plurality of basic service sets are not interfered when the wake-up frame is sent through the selected spectrum resources.
Further, whether the communication frame is in the overlapped basic service set or not is determined according to the value of the BSS color carried in the physical frame header of the received communication frame.
Wherein, the value of the BSS color indicates the identity of the base station, and the function is to distinguish the data of the BSS from the data of other BSSs. For example, when BSS color1 and BSS color2 carried in the physical frame header of the received communication frame are 1 and 6, the presence of OBSS is indicated, and the transmission spectrum resource of the wake up frame is to select a spectrum resource outside the coverage of the main communication channel of both.
In an embodiment of the present invention, the communication method of the wireless local area network further includes: and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
In the technical scheme, a communication process exists between a sender of an awake frame and a receiver of the awake frame before sending the awake frame, for example, an AP has already communicated with an STA (including sending of a beacon frame, receiving of a probe request frame, sending of a probe response frame, and the like) before sending the awake frame to the STA, and the communication process is completed through a main communication channel, so that a spectrum resource occupied by the main communication channel can be determined according to a historical communication situation between the sender of the awake frame and the receiver of the awake frame.
The main body of the communication method shown in fig. 1 may be an access point device in a network formed by an access point and a station, or may be a master station device in a peer-to-peer network formed by stations.
Fig. 2 is a schematic structural diagram of a communication apparatus of a wireless local area network according to a first embodiment of the present invention.
As shown in fig. 2, a communication apparatus 200 of a wireless local area network according to a first embodiment of the present invention includes: a generating unit 202, a processing unit 204 and a transmitting unit 206.
The generating unit 202 is configured to generate a wake-up frame, where the wake-up frame is used to wake up a data frame receiver of a device to enter a wake-up state to receive a data frame; the processing unit 204 is configured to determine a frequency spectrum resource for sending the wakeup frame, where the frequency spectrum resource for sending the wakeup frame is not overlapped with a frequency spectrum resource occupied by a main communication channel, and a bandwidth of the frequency spectrum resource for sending the wakeup frame is smaller than a bandwidth of the main communication channel; the sending unit 206 is configured to send the wake-up frame based on the spectrum resource determined by the processing unit.
In a specific implementation, the generating unit 202 may be a signal processor, a central processing unit, a baseband processor, or the like; the processing unit 204 may be a central processing unit or a baseband processor, etc.; the transmitting unit 206 may be a transmitter or an antenna, etc.
In the technical scheme, the awakening frame is sent by adopting the frequency spectrum resource which is not overlapped with the frequency spectrum resource occupied by the main communication channel, and the bandwidth of the frequency spectrum resource for sending the awakening frame is smaller than that of the main communication channel, so that the sending of the awakening frame cannot cause interference to the main communication channel, further, the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirement of WUR is met. The data frame is an IEEE802.11 data frame, the wakeup frame is a wake up frame, and the transmission power of the wake up frame is much lower than that of the IEEE802.11 data frame.
Meanwhile, the receiver for receiving the wake-up frame and the data frame can be the same physical entity, is only logically separated, and controls the working state of the receiver by using different internal operation instructions; in addition, the receiver for receiving the wake-up frame and the data frame may also be two physical entities, and a communication interface exists between the wake-up frame receiver and the data frame receiver, and after the wake-up frame receiver receives the wake-up frame, the wake-up frame receiver sends a wake-up instruction to the data frame receiver through the communication interface to wake up the data frame receiver for communication.
The primary communication channel is a channel for performing IEEE802.11 data communication or other signaling communication, and may be a communication channel for transmitting a beacon frame, a probe response frame, or the like. The overlapping of the spectrum resources means that the spectrum resources of the main communication channel and the transmitted wake-up frame are partially or completely overlapped, and the non-overlapping means that neither of the above two cases occurs. Such as: when the bandwidth of the frequency spectrum resource for sending the wakeup frame is 5MHz and the bandwidth of the main communication channel is 20MHz, the partial overlapping of the two indicates that the 5MHz frequency spectrum resource and the 20MHz frequency spectrum resource are partially overlapped; when the two are all overlapped, it means that the spectrum resource of 5MHz is in the spectrum resource range of 20 MHz.
In the above technical solution, preferably, the processing unit 204 includes: a detecting unit 2042, configured to detect whether a sender of the wake-up frame is in an overlapped basic service set;
a selecting unit 2044, configured to select, when the detecting unit 2042 detects that the sender is not in an overlapped basic service set, a spectrum resource for sending the wakeup frame outside a spectrum resource occupied by a main communication channel in the basic service set where the sender is currently located, and
when the detecting unit 2042 detects that the sender is in an overlapped basic service set, the spectrum resource for sending the wakeup frame is selected from the spectrum resources occupied by the main communication channels of a plurality of basic service sets forming the overlapped basic service set.
In the technical scheme, the overlapped basic service set is the OBSS, and when a sender of the wake-up frame is not in the overlapped basic service set, the frequency spectrum resource used for sending the wake-up frame can be selected only by considering the frequency spectrum resource occupied by the main communication channel in the current basic service set; when the sender of the wake-up frame is in the OBSS, spectrum resources occupied by main communication channels of a plurality of basic service sets forming the OBSS need to be considered, so as to ensure that the main communication channels of the plurality of basic service sets are not interfered when the wake-up frame is sent through the selected spectrum resources.
Further, the detecting unit 2042 is specifically configured to: and determining whether the communication frame is in an overlapped basic service set or not according to the value of the BSS color carried in the physical frame header of the received communication frame.
Wherein, the value of the BSS color indicates the identity of the base station, and the function is to distinguish the data of the BSS from the data of other BSSs. For example, when BSS color1 and BSS color2 carried in the physical frame header of the received communication frame are 1 and 6, the presence of OBSS is indicated, and the transmission spectrum resource of the wake up frame is to select a spectrum resource outside the coverage of the main communication channel of both.
In any of the above technical solutions, preferably, the processing unit 204 is further configured to: and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
In the technical scheme, a communication process exists between a sender of an awake frame and a receiver of the awake frame before sending the awake frame, for example, an AP has already communicated with an STA (including sending of a beacon frame, receiving of a probe request frame, sending of a probe response frame, and the like) before sending the awake frame to the STA, and the communication process is completed through a main communication channel, so that a spectrum resource occupied by the main communication channel can be determined according to a historical communication situation between the sender of the awake frame and the receiver of the awake frame.
Fig. 3 is a flowchart illustrating a communication method of a wireless lan according to a second embodiment of the present invention.
As shown in fig. 3, a communication method of a wireless local area network according to a second embodiment of the present invention includes the following steps:
step S30, receiving a wake-up frame, where the wake-up frame is used to wake up a data frame receiver of a device to enter a wake-up state to receive a data frame, where a spectrum resource occupied by the wake-up frame during transmission is not overlapped with a spectrum resource occupied by a main communication channel, and a bandwidth of the spectrum resource occupied by the wake-up frame during transmission is smaller than a bandwidth of the main communication channel;
step S32, after receiving the wake-up frame, waking up the data frame receiver to enter a wake-up state.
In the technical scheme shown in fig. 3, because the frequency spectrum resources occupied by the wakeup frame during transmission are not overlapped with the frequency spectrum resources occupied by the main communication channel, and the bandwidth of the frequency spectrum resources occupied by the wakeup frame during transmission is smaller than the bandwidth of the main communication channel, the wakeup frame does not interfere with the main communication channel during transmission, so that the occurrence of communication collision can be avoided, the frequency spectrum efficiency can be improved, and the WUR requirements can be met.
The main body of the communication method shown in fig. 3 may be a mobile phone or a PDA (Personal Digital Assistant).
Fig. 4 is a schematic structural diagram of a communication apparatus of a wireless lan according to a second embodiment of the present invention.
As shown in fig. 4, a communication apparatus 400 of a wireless lan according to a second embodiment of the present invention includes: a receiving unit 402 and a processing unit 404.
The receiving unit 402 is configured to receive a wakeup frame, where the wakeup frame is used to wake up a data frame receiver of a device to enter an awake state to receive a data frame, where a spectrum resource occupied by the wakeup frame during transmission is not overlapped with a spectrum resource occupied by a main communication channel, and a bandwidth of the spectrum resource occupied by the wakeup frame during transmission is smaller than a bandwidth of the main communication channel; the processing unit 404 is configured to wake up the data frame receiver to enter a wake-up state after the receiving unit 402 receives the wake-up frame.
In a specific implementation, the receiving unit 402 may be a receiver or an antenna, etc.; the processing unit 404 may be a central processing unit or a baseband processor, etc.
In the technical scheme, the frequency spectrum resources occupied by the wakeup frame during transmission are not overlapped with the frequency spectrum resources occupied by the main communication channel, and the bandwidth of the frequency spectrum resources occupied by the wakeup frame during transmission is smaller than that of the main communication channel, so that the wakeup frame does not interfere with the main communication channel during transmission, further the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of WUR are met.
The present invention also provides a communication device, comprising: a communication apparatus 200 of a wireless local area network as shown in fig. 2; and/or a communication device 400 of a wireless local area network as shown in fig. 4.
In summary, the technical solution of the present invention mainly uses a spectrum resource different from that of the main communication channel to transmit the wake up frame, thereby reducing interference to the main communication channel.
The specific scheme is as follows:
1. before sending the wake up frame, the device needs to detect whether there is an OBSS, and specifically, may determine whether the OBSS is in the OBSS according to a BSS color value carried in a physical frame header of the received communication frame.
2. And if the current BSS is not in the OBSS, determining a main communication channel of the current BSS, and further selecting a spectrum resource except the spectrum resource occupied by the main communication channel to send a wake up frame.
Specifically, the central frequency point of the BSS where the current BSS is located may be determined, and then the spectrum resource occupied by the main communication channel is determined according to the channel division rule in the existing Wi-Fi standard.
When determining the central frequency point of the BSS where the BSS is currently located, the central frequency point may be determined according to a communication situation before a receiver of the wake up frame.
As shown in fig. 5, assuming that the main communication channel of the BSS1 is channel 1 and there is no OBSS, when selecting the spectrum resource for transmitting the wake up frame, the devices in the BSS1 may select the spectrum resource from the spectrum resources covered by channel 1, and the bandwidth of the spectrum resource for transmitting the wake up frame should be smaller than the bandwidth of channel 1.
3. And if the mobile terminal is in the OBSS, determining main communication channels of a plurality of BSSs forming the OBSS, and further selecting frequency spectrum resources except the frequency spectrum resources occupied by the main communication channels of the plurality of BSSs to send wake up frames.
Specifically, the center frequency point of the OBSS may be determined, and then the spectrum resource occupied by the main communication channel is determined according to the channel division rule in the existing Wi-Fi standard. When determining the central frequency point of the OBSS, the central frequency point may be determined according to a communication situation before a receiver of the wake up frame.
As shown in fig. 6, assuming that the main communication channel of BSS1 is channel 1 and the main communication channel of BSS2 is channel 4, both of which form OBSS, when selecting the spectrum resource for transmitting the wake up frame, the spectrum resource can be selected from spectrum resources other than the spectrum resources covered by channel 1 and channel 4, and the bandwidth of the spectrum resource for transmitting the wake up frame should be smaller than the bandwidth of channel 1 and channel 4.
The technical scheme of the invention is described in detail in the above with reference to the accompanying drawings, and the invention provides a new communication scheme of a wireless local area network, so that the sending of the wakeup frame does not cause interference to a main communication channel, further the occurrence of communication conflict can be avoided, the frequency spectrum efficiency can be improved, and the requirements of WUR can be met.
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 (5)
1. A communication method for a wireless local area network, comprising:
generating a wake-up frame for waking up a data frame receiver of a device into a wake-up state to receive a data frame;
determining the frequency spectrum resource for sending the wake-up frame, wherein the frequency spectrum resource for sending the wake-up frame is not overlapped with the frequency spectrum resource occupied by a main communication channel, and the bandwidth of the frequency spectrum resource for sending the wake-up frame is smaller than the bandwidth of the main communication channel;
the step of determining the frequency spectrum resource for sending the wakeup frame specifically includes:
detecting whether the basic service sets are overlapped;
if the mobile terminal is not in the overlapped basic service set, selecting to send the frequency spectrum resource of the wake-up frame out of the frequency spectrum resources occupied by the main communication channel in the current basic service set;
if the mobile terminal is in the overlapped basic service set, selecting the frequency spectrum resource for sending the wake-up frame out of the frequency spectrum resources occupied by the main communication channels of the multiple basic service sets forming the overlapped basic service set;
transmitting the wakeup frame based on the determined spectrum resources;
and determining whether the communication frame is in an overlapped basic service set or not according to the value of the BSS color carried in the physical frame header of the received communication frame.
2. The communication method of the wireless local area network according to claim 1, further comprising:
and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
3. A communication apparatus of a wireless local area network, comprising:
a generating unit, configured to generate a wake-up frame, where the wake-up frame is used to wake up a data frame receiver of a device to enter a wake-up state to receive a data frame;
the processing unit is used for determining the frequency spectrum resource for sending the wake-up frame, wherein the frequency spectrum resource for sending the wake-up frame is not overlapped with the frequency spectrum resource occupied by a main communication channel, and the bandwidth of the frequency spectrum resource for sending the wake-up frame is smaller than that of the main communication channel;
the processing unit includes:
a detecting unit, configured to detect whether a sender of the wakeup frame is in an overlapped basic service set;
a selecting unit, configured to select, when the detecting unit detects that the sender is not in an overlapped basic service set, a spectrum resource for sending the wakeup frame outside a spectrum resource occupied by a main communication channel in the basic service set where the sender is currently located, an
When the detecting unit detects that the sender is in an overlapped basic service set, selecting a frequency spectrum resource for sending the wake-up frame out of frequency spectrum resources occupied by main communication channels of a plurality of basic service sets forming the overlapped basic service set;
a sending unit, configured to send the wakeup frame based on the spectrum resource determined by the processing unit;
the detection unit is specifically configured to:
and determining whether the communication frame is in an overlapped basic service set or not according to the value of the BSS color carried in the physical frame header of the received communication frame.
4. The communications apparatus of claim 3, wherein the processing unit is further configured to:
and determining the frequency spectrum resources occupied by the main communication channel according to the historical communication condition between the main communication channel and the receiver of the wake-up frame.
5. A communication device, comprising:
communication device of a wireless local area network according to claim 3 or 4.
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