CN108737053B - Communication method and device of wireless local area network, station equipment and access point equipment - Google Patents

Communication method and device of wireless local area network, station equipment and access point equipment Download PDF

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CN108737053B
CN108737053B CN201710288756.4A CN201710288756A CN108737053B CN 108737053 B CN108737053 B CN 108737053B CN 201710288756 A CN201710288756 A CN 201710288756A CN 108737053 B CN108737053 B CN 108737053B
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change
bss color
color value
access point
management message
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CN108737053A (en
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董贤东
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Meizu Technology Co Ltd
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Meizu Technology Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • 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]

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Abstract

The invention provides a communication method, a communication device, site equipment and access point equipment of a wireless local area network, wherein the communication method comprises the following steps: receiving a plurality of change management message frames, wherein the change management message frames contain BSS color value change information, and the BSS color value change information contains changed BSS color values; if it is determined that the BSS color value change information of at least two change management message frames in the plurality of change management message frames is the same; and generating and sending a change stop frame to instruct the access point equipment to stop changing the BSS color value, or generating and sending a change request frame to instruct the access point equipment to change the BSS color value again. By the technical scheme of the invention, the occurrence of communication conflict is reduced, and the frequency spectrum utilization rate and the throughput of the basic service set are improved.

Description

Communication method and device of wireless local area network, station equipment and access point equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a communication method of a wireless local area network, a communication apparatus of a wireless local area network, a station device, and an access point device.
Background
In 2013, IEEE (Institute of Electrical and Electronics Engineers) 802.11 established a research group HEW (High efficiency Wireless local area network) of the next generation Wi-Fi (Wireless Fidelity, Wireless local area network based on IEEE802.11 b standard) technology, i.e., IEEE802.11ax, and the main research points are to improve the throughput of the existing Wi-Fi technology, improve the effective utilization efficiency of the spectrum, improve the user experience and the quality of service e (quality of qos) and achieve a more intensive communication environment than the existing Wi-Fi technology.
The denser communication environment refers to that there are more OBSSs (Overlapping basic Service Set) in the communication process, if there are more OBSSs, this means that there are more communication conflicts in the communication process, and in order to reduce the occurrence of communication conflicts, the following solutions are mainly adopted at present:
in the standard establishing process, a Color mechanism defined in the IEEE802.11 ah standard is adopted, that is, in the communication process of an AP (Access Point), a BSS (basic Service Set) Color value is Set and indicated as an identifier of a basic Service Set, which is used for enabling a Station device to better distinguish data of the BSS from data frames of other BSSs, and if in the associating process, as shown in fig. 1, it is assumed that A, B, C respectively represent different APs, and an STA (Station device) in an OBSS detects that multiple BSS Color values are the same, the STA will report a request frame for changing the BSS Color value like an associated AP.
However, each STA in the OBSS reports the request frame and triggers the AP to change the BSS color value, which at least results in the following technical defects:
(1) after the AP changes the BSS color value, the same BSS color value still exists;
(2) causing excessive power consumption loss of the AP for changing the BSS color value;
(3) the change efficiency of the BSS color value is reduced, communication conflict is caused, and the communication quality is also seriously influenced.
Disclosure of Invention
The invention provides a communication technical scheme of a wireless local area network based on at least one of the problems, and the invention optimizes the change mechanism of the BSS color value by determining that the BSS color value change information of at least two change management message frames in a plurality of change management message frames is the same, generating and sending a change stop frame to indicate the access point equipment to stop changing the BSS color value or generating and sending a change request frame to indicate the access point equipment to change the BSS color value again, thereby being particularly suitable for site equipment in an OBSS, improving the reliability and efficiency of the change of the BSS color value, reducing the occurrence of communication conflict and improving the frequency spectrum utilization rate and the throughput of a basic service set.
In view of this, according to an embodiment of the first aspect of the present invention, a communication method of a wireless local area network is provided, including: receiving a plurality of change management message frames, wherein the change management message frames contain BSS color value change information, and the BSS color value change information contains changed BSS color values; if it is determined that the BSS color value change information of at least two change management message frames in the plurality of change management message frames is the same; and generating and sending a change stop frame to instruct the access point equipment to stop changing the BSS color value, or generating and sending a change request frame to instruct the access point equipment to change the BSS color value again.
The BSS color value is an identifier of the BSS, wherein if the BSS values are different, the BSS coverage is different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the BSS color value change information of at least two change management message frames in a plurality of change management message frames is determined to be the same, a change stop frame is generated and sent to indicate the access point equipment to stop changing the BSS color value, or a change request frame is generated and sent to indicate the access point equipment to change the BSS color value again, so that a change mechanism of the BSS color value is optimized, the change mechanism is particularly suitable for the station equipment in the OBSS, the reliability and the efficiency of change of the BSS color value are improved, the occurrence of communication conflicts is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
For example, an AP may form different BSSs (i.e., OBSS) when transmitting different data, form BSS1 when transmitting single-user Extended Range data frames (i.e., Extended Range SU PPDU), and form BSS0 when transmitting other data frames. And communications of BSS1 may interfere with communications of BSS2, while communications of BSS0 may not interfere with communications of BSS 2. In order to reduce communication conflicts between different BSSs, it is necessary to request the access point device to change the same BSS color value, so that the station device determines the CCA value according to the BSS color value, that is, adjusts the transmit-receive power of the receiver.
Wherein, the variation of CCA (Clear Channel Assessment) value means that the receiver of the communication device changes the sensitivity of the receiver, for example, the receiver sensitivity is reduced from-72 dBm to-68 dBm, that is, the signal energy that the receiver can sense is changed from-72 dBm to-68 dBm, and when the signal with the minimum energy of-72 dBm is transmitted, the receiver cannot sense, that is, the receiver determines that the Channel is idle.
It should be noted that the basic service set proposed by the present invention refers to a network formed by access point devices (associated or not) and site devices, and may set a frame header of a change management message frame to carry BSS color value change information, and the communication method makes the communication device in the OBSS more suitable for the application scenario of ieee802.11ax, and improves the throughput of the area.
In the technical solution, preferably, the BSS color value change information further includes a BSS color value change countdown value, and the change stop frame is used to instruct to stop the countdown of the BSS color value change countdown value, so as to stop changing the BSS color value.
In the technical solution, when the countdown for changing the value of the countdown counter from the BSS color value to 0 indicates that the BSS color value has changed, the BSS color value change information carried by the change management message frame is as shown in the following table 1:
TABLE 1
Element ID Length Element ID extension Color switch countdown BSS color
Wherein, the value of CCA may be encapsulated in a change management message frame in the form of an Information Element (IE) and transmitted, where "Color switch count down" corresponds to the BSS Color value change countdown value, and "BSS Color" corresponds to the BSS Color value.
Specifically, for example, the "Color switch count" field in the first change management message frame generated and sent by the access point device is "7", the "Color switch count" field in the second change management message frame generated and sent is decremented to "6" in the countdown process, and the "Color switch count" field in the eighth change management message frame is decremented to "0", which indicates that the BSS Color value of the station device is changed to the "BSS Color" carried by the eighth change management message frame.
In the technical solution, preferably, the method further includes: if it is detected that the BSS color values of at least two change management message frames in the plurality of change management message frames are the same, determining a plurality of access point devices with the same BSS color value; according to the BSS Color value change countdown counter value of the multiple access point devices, determining the access point device which completes the BSS Color value change firstly in the multiple access point devices as a first access point device, and simultaneously determining the access point device which does not complete the BSS Color value change in the multiple access point devices as a second access point device; and generating and sending a change stop frame to the second access point equipment to indicate the second access point equipment to stop changing the BSS color value.
In the technical scheme, the access point equipment which firstly completes the change of the BSS color value in the plurality of access point equipment is determined as first access point equipment and the access point equipment which does not complete the change of the BSS color value in the plurality of access point equipment is determined as second access point equipment by determining the plurality of access point equipment with the same BSS color value and changing the value of the reciprocal counter according to the BSS color value of the plurality of access point equipment.
In the technical solution, preferably, the method further includes: and if detecting that at least two pieces of BSS color value change information in the plurality of change management message frames are the same, generating and sending a change request frame to indicate the access point equipment to change the BSS color value again, wherein the BSS color value change information is the same and indicates that the BSS color value is equal to the BSS color value change countdown counter value.
In the technical scheme, if it is detected that at least two pieces of BSS color value change information in a plurality of change management message frames are the same, that is, the BSS color value to be changed and the BSS color value change countdown counter value are both equal, the BSS color values changed by a plurality of access point devices are still the same, and therefore, a change request frame is generated and sent to indicate the access point devices to change the BSS color value again, it is not necessary to wait for the BSS color value change countdown counter value to be 0, it is determined that the BSS color values are the same and need to be changed again, and the efficiency of BSS color value change is further improved.
According to an embodiment of the second aspect of the present invention, a communication method of a wireless local area network is provided, including: and receiving a change stop frame or a change request frame, wherein the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, and the change request frame is used for indicating to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the change stop frame or the change request frame is received, the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, the change request frame is used for indicating to change the BSS color value again, a change mechanism of the BSS color value is optimized, and the change mechanism is particularly suitable for station equipment in an OBSS (on-board service system), so that the reliability and the efficiency of the change of the BSS color value are improved, the occurrence of communication conflict is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
In the technical solution, preferably, the method further includes: generating a change management message frame, wherein the change management message frame contains BSS color value change information; and sending a change management message frame, wherein the BSS color value change information comprises a BSS color value change countdown counter value and a BSS color value.
In the technical scheme, the change management message frame is generated and sent, and contains the BSS color value change information, so that communication conflicts among different BSSs are reduced, the station equipment determines the CCA value in time according to the BSS color value, and the receiving and transmitting power of the receiver is also adjusted.
In the technical solution, preferably, the method further includes: and when the change management message frame is unicast, multicast or broadcast, setting the BSS color value change information written in the change management message frame not to be encrypted.
In the technical scheme, because the basic service set provided by the invention is suitable for the associated communication scene and the non-associated communication scene, when the change management message frame is unicast or multicast or broadcast, the BSS color value change information written in the change management message frame is set to be not encrypted, so that all access point devices in the OBSS can analyze the BSS color value change information, the occurrence of communication conflicts in the OBSS is reduced to the greatest extent, and the spectrum utilization rate and the throughput of the basic service set are improved.
In the technical solution, preferably, the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
In this technical solution, the change management message frame is one of a Beacon frame (i.e., Beacon), a Probe response frame (i.e., Probe response), and an association response frame (i.e., (re) association response).
According to an embodiment of the third aspect of the present invention, a communication apparatus of a wireless local area network is provided, including: a receiving unit, configured to receive multiple change management message frames, where BSS color value change information is set in the change management message frames, and the BSS color value change information includes a changed BSS color value; a determining unit, configured to determine that the BSS color value change information of at least two change management message frames of the plurality of change management message frames is the same; and the sending unit is used for generating and sending a change stop frame to instruct the access point equipment to stop changing the BSS color value, or generating and sending a change request frame to instruct the access point equipment to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the BSS color value change information of at least two change management message frames in a plurality of change management message frames is determined to be the same, a change stop frame is generated and sent to indicate the access point equipment to stop changing the BSS color value, or a change request frame is generated and sent to indicate the access point equipment to change the BSS color value again, so that a change mechanism of the BSS color value is optimized, the change mechanism is particularly suitable for the station equipment in the OBSS, the reliability and the efficiency of change of the BSS color value are improved, the occurrence of communication conflicts is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
For example, an AP may form different BSSs (i.e., OBSS) when transmitting different data, form BSS1 when transmitting single-user Extended Range data frames (i.e., Extended Range SU PPDU), and form BSS0 when transmitting other data frames. And communications of BSS1 may interfere with communications of BSS2, while communications of BSS0 may not interfere with communications of BSS 2. In order to reduce communication conflicts between different BSSs, it is necessary to request the access point device to change the same BSS color value, so that the station device determines the CCA value according to the BSS color value, that is, adjusts the transmit-receive power of the receiver.
Wherein, the variation of CCA (Clear Channel Assessment) value means that the receiver of the communication device changes the sensitivity of the receiver, for example, the receiver sensitivity is reduced from-72 dBm to-68 dBm, that is, the signal energy that the receiver can sense is changed from-72 dBm to-68 dBm, and when the signal with the minimum energy of-72 dBm is transmitted, the receiver cannot sense, that is, the receiver determines that the Channel is idle.
It should be noted that the basic service set proposed by the present invention refers to a network formed by access point devices (associated or not) and site devices, and may set a frame header of a change management message frame to carry BSS color value change information, and the communication method makes the communication device in the OBSS more suitable for the application scenario of ieee802.11ax, and improves the throughput of the area.
In the technical solution, preferably, the BSS color value change information further includes a BSS color value change countdown value, and the change stop frame is used to instruct to stop the countdown of the BSS color value change countdown value, so as to stop changing the BSS color value.
In the technical solution, when the countdown for changing the value of the countdown counter from the BSS color value to 0 indicates that the BSS color value has changed, the BSS color value change information carried by the change management message frame is as shown in the following table 2:
TABLE 2
Element ID Length Element ID extension Color switch countdown BSS color
Wherein, the value of CCA may be encapsulated in a change management message frame in the form of an Information Element (IE) and transmitted, where "Color switch count down" corresponds to the BSS Color value change countdown value, and "BSS Color" corresponds to the BSS Color value.
Specifically, for example, the "Color switch count" field in the first change management message frame generated and sent by the access point device is "7", the "Color switch count" field in the second change management message frame generated and sent is decremented to "6" in the countdown process, and the "Color switch count" field in the eighth change management message frame is decremented to "0", which indicates that the BSS Color value of the station device is changed to the "BSS Color" carried by the eighth change management message frame.
In the technical solution, preferably, the determining unit is further configured to: if it is detected that the BSS color values of at least two change management message frames in the plurality of change management message frames are the same, determining a plurality of access point devices with the same BSS color value; the determination unit is further configured to: according to the BSS Color value change countdown counter value of the multiple access point devices, determining the access point device which completes the BSS Color value change firstly in the multiple access point devices as a first access point device, and simultaneously determining the access point device which does not complete the BSS Color value change in the multiple access point devices as a second access point device; the sending unit is further configured to: and generating and sending a change stop frame to the second access point equipment to indicate the second access point equipment to stop changing the BSS color value.
In the technical scheme, the access point equipment which firstly completes the change of the BSS color value in the plurality of access point equipment is determined as first access point equipment and the access point equipment which does not complete the change of the BSS color value in the plurality of access point equipment is determined as second access point equipment by determining the plurality of access point equipment with the same BSS color value and changing the value of the reciprocal counter according to the BSS color value of the plurality of access point equipment.
In the technical solution, preferably, the determining unit is further configured to: and if detecting that at least two pieces of BSS color value change information in the plurality of change management message frames are the same, generating and sending a change request frame to indicate the access point equipment to change the BSS color value again, wherein the BSS color value change information is the same and indicates that the BSS color value is equal to the BSS color value change countdown counter value.
In the technical scheme, if it is detected that at least two pieces of BSS color value change information in a plurality of change management message frames are the same, that is, the BSS color value to be changed and the BSS color value change countdown counter value are both equal, the BSS color values changed by a plurality of access point devices are still the same, and therefore, a change request frame is generated and sent to indicate the access point devices to change the BSS color value again, it is not necessary to wait for the BSS color value change countdown counter value to be 0, it is determined that the BSS color values are the same and need to be changed again, and the efficiency of BSS color value change is further improved.
According to an embodiment of the fourth aspect of the present invention, a communication apparatus of a wireless local area network is provided, including: and a receiving unit, configured to receive a change stop frame or a change request frame, where the change stop frame is used to instruct to stop the countdown of the BSS color value to the countdown counter value so as to stop changing the BSS color value, and the change request frame is used to instruct to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the change stop frame or the change request frame is received, the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, the change request frame is used for indicating to change the BSS color value again, a change mechanism of the BSS color value is optimized, and the change mechanism is particularly suitable for station equipment in an OBSS (on-board service system), so that the reliability and the efficiency of the change of the BSS color value are improved, the occurrence of communication conflict is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
In the technical solution, preferably, the method further includes: a generating unit, configured to generate a change management message frame, where the change management message frame includes BSS color value change information; and a sending unit, configured to send a change management message frame, where the BSS color value change information includes a BSS color value change countdown counter value and a BSS color value.
In the technical scheme, the change management message frame is generated and sent, and contains the BSS color value change information, so that communication conflicts among different BSSs are reduced, the station equipment determines the CCA value in time according to the BSS color value, and the receiving and transmitting power of the receiver is also adjusted.
In the technical solution, preferably, the method further includes: and a writing unit, configured to set the BSS color value change information written in the change management message frame to be unencrypted when the change management message frame is unicast, multicast, or broadcast.
In the technical scheme, because the basic service set provided by the invention is suitable for the associated communication scene and the non-associated communication scene, when the change management message frame is unicast or multicast or broadcast, the BSS color value change information written in the change management message frame is set to be not encrypted, so that all access point devices in the OBSS can analyze the BSS color value change information, the occurrence of communication conflicts in the OBSS is reduced to the greatest extent, and the spectrum utilization rate and the throughput of the basic service set are improved.
In the technical solution, preferably, the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
In this technical solution, the change management message frame is one of a Beacon frame (i.e., Beacon), a Probe response frame (i.e., Probe response), and an association response frame (i.e., (re) association response).
According to an embodiment of the fifth aspect of the present invention, a station apparatus is provided, which includes the communication device of the wireless local area network according to any one of the third aspects, and therefore has all the technical effects of the communication device of the wireless local area network.
According to an embodiment of the sixth aspect of the present invention, an access point device is provided, which includes the communication apparatus of the wireless lan according to any one of the aspects of the fourth aspect, and therefore has all the technical effects of the communication apparatus of the wireless lan.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention and/or additional aspects and advantages will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic diagram of an OBSS architecture in the related art;
fig. 2 shows a schematic flow diagram of a communication method of a wireless local area network according to an embodiment of the invention;
fig. 3 shows a schematic flow chart of a communication method of a wireless local area network according to a further embodiment of the invention;
fig. 4 shows a schematic block diagram of a communication device of a wireless local area network according to an embodiment of the present invention;
fig. 5 shows a schematic block diagram of a communication device of a wireless local area network according to a further embodiment of the present invention;
FIG. 6 shows a schematic block diagram of a station apparatus according to one embodiment of the present invention;
fig. 7 shows a schematic block diagram of an access point device according to an embodiment of the invention.
Detailed Description
So that the objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof that are illustrated in 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 shows a schematic flow diagram of a communication method of a wireless local area network according to one embodiment of the invention.
As shown in fig. 2, a communication method of a wireless local area network according to an embodiment of the present invention includes: step S202, receiving a plurality of change management message frames, wherein the change management message frames contain BSS color value change information, and the BSS color value change information contains changed BSS color values; step S204, if it is determined that the BSS color value change information of at least two change management message frames in the plurality of change management message frames is the same; step S206, generating and sending a change stop frame to instruct the access point device to stop changing the BSS color value, or generating and sending a change request frame to instruct the access point device to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the BSS color value change information of at least two change management message frames in a plurality of change management message frames is determined to be the same, a change stop frame is generated and sent to indicate the access point equipment to stop changing the BSS color value, or a change request frame is generated and sent to indicate the access point equipment to change the BSS color value again, so that a change mechanism of the BSS color value is optimized, the change mechanism is particularly suitable for the station equipment in the OBSS, the reliability and the efficiency of change of the BSS color value are improved, the occurrence of communication conflicts is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
For example, an AP may form different BSSs (i.e., OBSS) when transmitting different data, form BSS1 when transmitting single-user Extended Range data frames (i.e., Extended Range SU PPDU), and form BSS0 when transmitting other data frames. And communications of BSS1 may interfere with communications of BSS2, while communications of BSS0 may not interfere with communications of BSS 2. In order to reduce communication conflicts between different BSSs, it is necessary to request the access point device to change the same BSS color value, so that the station device determines the CCA value according to the BSS color value, that is, adjusts the transmit-receive power of the receiver.
Wherein, the variation of CCA (Clear Channel Assessment) value means that the receiver of the communication device changes the sensitivity of the receiver, for example, the receiver sensitivity is reduced from-72 dBm to-68 dBm, that is, the signal energy that the receiver can sense is changed from-72 dBm to-68 dBm, and when the signal with the minimum energy of-72 dBm is transmitted, the receiver cannot sense, that is, the receiver determines that the Channel is idle.
It should be noted that the basic service set proposed by the present invention refers to a network formed by access point devices (associated or non-associated) and site devices, and may set a frame header of a change management message frame to carry BSS color value change information, and the communication method makes the communication device in the OBSS better adapted to the application scenario of IEEE802.11ax, thereby improving the area throughput.
In the technical solution, preferably, the BSS color value change information further includes a BSS color value change countdown value, and the change stop frame is used to instruct to stop the countdown of the BSS color value change countdown value, so as to stop changing the BSS color value.
In the technical solution, when the countdown for changing the value of the countdown counter from the BSS color value to 0 indicates that the BSS color value has changed, the BSS color value change information carried by the change management message frame is as shown in the following table 3:
TABLE 3
Element ID Length Element ID extension Color switch countdown BSS color
Wherein, the value of CCA may be encapsulated in a change management message frame in the form of an Information Element (IE) and transmitted, where "Color switch count down" corresponds to the BSS Color value change countdown value, and "BSS Color" corresponds to the BSS Color value.
Specifically, for example, the "Color switch count" field in the first change management message frame generated and sent by the access point device is "7", the "Color switch count" field in the second change management message frame generated and sent is decremented to "6" in the countdown process, and the "Color switch count" field in the eighth change management message frame is decremented to "0", which indicates that the BSS Color value of the station device is changed to the "BSS Color" carried by the eighth change management message frame.
In the technical solution, preferably, the method further includes: if it is detected that the BSS color values of at least two change management message frames in the plurality of change management message frames are the same, determining a plurality of access point devices with the same BSS color value; according to the BSS Color value change countdown counter value of the multiple access point devices, determining the access point device which completes the BSS Color value change firstly in the multiple access point devices as a first access point device, and simultaneously determining the access point device which does not complete the BSS Color value change in the multiple access point devices as a second access point device; and generating and sending a change stop frame to the second access point equipment to indicate the second access point equipment to stop changing the BSS color value.
In the technical scheme, the access point equipment which firstly completes the change of the BSS color value in the plurality of access point equipment is determined as first access point equipment and the access point equipment which does not complete the change of the BSS color value in the plurality of access point equipment is determined as second access point equipment by determining the plurality of access point equipment with the same BSS color value and changing the value of the reciprocal counter according to the BSS color value of the plurality of access point equipment.
In the technical solution, preferably, the method further includes: and if detecting that at least two pieces of BSS color value change information in the plurality of change management message frames are the same, generating and sending a change request frame to indicate the access point equipment to change the BSS color value again, wherein the BSS color value change information is the same and indicates that the BSS color value is equal to the BSS color value change countdown counter value.
In the technical scheme, if it is detected that at least two pieces of BSS color value change information in a plurality of change management message frames are the same, that is, the BSS color value to be changed and the BSS color value change countdown counter value are both equal, the BSS color values changed by a plurality of access point devices are still the same, and therefore, a change request frame is generated and sent to indicate the access point devices to change the BSS color value again, it is not necessary to wait for the BSS color value change countdown counter value to be 0, it is determined that the BSS color values are the same and need to be changed again, and the efficiency of BSS color value change is further improved.
Fig. 3 shows a schematic flow chart of a communication method of a wireless local area network according to yet another embodiment of the present invention.
As shown in fig. 3, a communication method of a wireless local area network according to still another embodiment of the present invention includes: step 302, receiving a change stop frame or a change request frame, where the change stop frame is used to instruct to stop the countdown of the BSS color value change to the countdown counter value so as to stop changing the BSS color value, and the change request frame is used to instruct to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
In the technical scheme, the change stop frame or the change request frame is received, the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, the change request frame is used for indicating to change the BSS color value again, a change mechanism of the BSS color value is optimized, and the change mechanism is particularly suitable for station equipment in an OBSS (on-board service system), so that the reliability and the efficiency of the change of the BSS color value are improved, the occurrence of communication conflict is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
In the technical solution, preferably, the method further includes: generating a change management message frame, wherein the change management message frame contains BSS color value change information; and sending a change management message frame, wherein the BSS color value change information comprises a BSS color value change countdown counter value and a BSS color value.
In the technical scheme, the change management message frame is generated and sent, and contains the BSS color value change information, so that communication conflicts among different BSSs are reduced, the station equipment determines the CCA value in time according to the BSS color value, and the receiving and transmitting power of the receiver is also adjusted.
In the technical solution, preferably, the method further includes: and when the change management message frame is unicast, multicast or broadcast, setting the BSS color value change information written in the change management message frame not to be encrypted.
In the technical scheme, because the basic service set provided by the invention is suitable for the associated communication scene and the non-associated communication scene, when the change management message frame is unicast or multicast or broadcast, the BSS color value change information written in the change management message frame is set to be not encrypted, so that all access point devices in the OBSS can analyze the BSS color value change information, the occurrence of communication conflicts in the OBSS is reduced to the greatest extent, and the spectrum utilization rate and the throughput of the basic service set are improved.
In the technical solution, preferably, the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
In this technical solution, the change management message frame is one of a Beacon frame (i.e., Beacon), a Probe response frame (i.e., Probe response), and an association response frame (i.e., (re) association response).
Fig. 4 shows a schematic block diagram of a communication device of a wireless local area network according to an embodiment of the present invention
As shown in fig. 4, a communication apparatus 400 of a wireless local area network according to an embodiment of the present invention includes: a receiving unit 402, configured to receive multiple change management message frames, where BSS color value change information is set in the change management message frames, and the BSS color value change information includes a changed BSS color value; a determining unit 404, configured to determine that the BSS color value change information of at least two change management message frames in the plurality of change management message frames is the same; a sending unit 406, configured to generate and send a change stop frame to instruct the access point device to stop changing the BSS color value, or generate and send a change request frame to instruct the access point device to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
It is to be noted that the communication apparatus may be compatible with or integrated with a mobile phone, a tablet computer, a music playing apparatus, a navigation apparatus, and other station devices having a Wi-Fi communication module, the receiving unit 402 may be a master transceiver and/or a slave transceiver (such as an antenna and a carrier modulation module) of the communication apparatus, the determining unit 404 may be a processor (CPU), a controller (MCU), an embedded micro-control chip, a baseband processor, and the like of the communication apparatus, and the transmitting unit 406 may be a master transceiver and/or a slave transceiver (such as an antenna and a carrier modulation module) of the communication apparatus.
In the technical scheme, the BSS color value change information of at least two change management message frames in a plurality of change management message frames is determined to be the same, a change stop frame is generated and sent to indicate the access point equipment to stop changing the BSS color value, or a change request frame is generated and sent to indicate the access point equipment to change the BSS color value again, so that a change mechanism of the BSS color value is optimized, the change mechanism is particularly suitable for the station equipment in the OBSS, the reliability and the efficiency of change of the BSS color value are improved, the occurrence of communication conflicts is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
For example, an AP may form different BSSs (i.e., OBSS) when transmitting different data, form BSS1 when transmitting single-user Extended Range data frames (i.e., Extended Range SU PPDU), and form BSS0 when transmitting other data frames. And communications of BSS1 may interfere with communications of BSS2, while communications of BSS0 may not interfere with communications of BSS 2. In order to reduce communication conflicts between different BSSs, it is necessary to request the access point device to change the same BSS color value, so that the station device determines the CCA value according to the BSS color value, that is, adjusts the transmit-receive power of the receiver.
Wherein, the variation of CCA (Clear Channel Assessment) value means that the receiver of the communication device changes the sensitivity of the receiver, for example, the receiver sensitivity is reduced from-72 dBm to-68 dBm, that is, the signal energy that the receiver can sense is changed from-72 dBm to-68 dBm, and when the signal with the minimum energy of-72 dBm is transmitted, the receiver cannot sense, that is, the receiver determines that the Channel is idle.
It should be noted that the basic service set proposed by the present invention refers to a network formed by access point devices (associated or not) and site devices, and may set a frame header of a change management message frame to carry BSS color value change information, and the communication method makes the communication device in the OBSS more suitable for the application scenario of ieee802.11ax, and improves the throughput of the area.
In the technical solution, preferably, the BSS color value change information further includes a BSS color value change countdown value, and the change stop frame is used to instruct to stop the countdown of the BSS color value change countdown value, so as to stop changing the BSS color value.
In the technical solution, when the countdown for changing the value of the countdown counter from the BSS color value to 0 indicates that the BSS color value has changed, the BSS color value change information carried by the change management message frame is as shown in the following table 4:
TABLE 4
Element ID Length Element ID extension Color switch countdown BSS color
Wherein, the value of CCA may be encapsulated in a change management message frame in the form of an Information Element (IE) and transmitted, where "Color switch count down" corresponds to the BSS Color value change countdown value, and "BSS Color" corresponds to the BSS Color value.
Specifically, for example, the "Color switch count" field in the first change management message frame generated and sent by the access point device is "7", the "Color switch count" field in the second change management message frame generated and sent is decremented to "6" in the countdown process, and the "Color switch count" field in the eighth change management message frame is decremented to "0", which indicates that the BSS Color value of the station device is changed to the "BSS Color" carried by the eighth change management message frame.
In this embodiment, preferably, the determining unit 404 is further configured to: if it is detected that the BSS color values of at least two change management message frames in the plurality of change management message frames are the same, determining a plurality of access point devices with the same BSS color value; the determining unit 404 is further configured to: according to the BSS Color value change countdown counter value of the multiple access point devices, determining the access point device which completes the BSS Color value change firstly in the multiple access point devices as a first access point device, and simultaneously determining the access point device which does not complete the BSS Color value change in the multiple access point devices as a second access point device; the sending unit 406 is further configured to: and generating and sending a change stop frame to the second access point equipment to indicate the second access point equipment to stop changing the BSS color value.
In the technical scheme, the access point equipment which firstly completes the change of the BSS color value in the plurality of access point equipment is determined as first access point equipment and the access point equipment which does not complete the change of the BSS color value in the plurality of access point equipment is determined as second access point equipment by determining the plurality of access point equipment with the same BSS color value and changing the value of the reciprocal counter according to the BSS color value of the plurality of access point equipment.
In this embodiment, preferably, the determining unit 404 is further configured to: and if detecting that at least two pieces of BSS color value change information in the plurality of change management message frames are the same, generating and sending a change request frame to indicate the access point equipment to change the BSS color value again, wherein the BSS color value change information is the same and indicates that the BSS color value is equal to the BSS color value change countdown counter value.
In the technical scheme, if it is detected that at least two pieces of BSS color value change information in a plurality of change management message frames are the same, that is, the BSS color value to be changed and the BSS color value change countdown counter value are both equal, the BSS color values changed by a plurality of access point devices are still the same, and therefore, a change request frame is generated and sent to indicate the access point devices to change the BSS color value again, it is not necessary to wait for the BSS color value change countdown counter value to be 0, it is determined that the BSS color values are the same and need to be changed again, and the efficiency of BSS color value change is further improved.
Fig. 5 shows a schematic block diagram of a communication device of a wireless local area network according to a further embodiment of the present invention.
As shown in fig. 5, a communication apparatus 500 of a wireless local area network according to another embodiment of the present invention includes: a receiving unit 502, configured to receive a change stop frame or a change request frame, where the change stop frame is used to instruct to stop the countdown for changing the BSS color value to the countdown counter value, so as to stop changing the BSS color value, and the change request frame is used to instruct to change the BSS color value again.
Wherein, the BSS color value is an identifier of the BSS, and if the BSS values are different, the coverage of the BSS is also different.
In addition, the access point device comprises a Wi-Fi router device, and/or a server device provided with a Wi-Fi communication module, and/or an access node device provided with a Wi-Fi communication module.
It is to be noted that the above-mentioned communication apparatus may be compatible with or integrated with an access point device having a Wi-Fi communication module, and the receiving unit 502 may be a master transceiver device and/or a slave transceiver device (such as an antenna and a carrier modulation module, etc.) of the above-mentioned communication apparatus.
In the technical scheme, the change stop frame or the change request frame is received, the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, the change request frame is used for indicating to change the BSS color value again, a change mechanism of the BSS color value is optimized, and the change mechanism is particularly suitable for station equipment in an OBSS (on-board service system), so that the reliability and the efficiency of the change of the BSS color value are improved, the occurrence of communication conflict is reduced, and the frequency spectrum utilization rate and the throughput of a basic service set are improved.
In the technical solution, preferably, the method further includes: a generating unit 504, configured to generate a change management message frame, where the change management message frame includes BSS color value change information; a sending unit 506, configured to send a change management message frame, where the BSS color value change information includes a BSS color value change countdown value and a BSS color value.
In the technical scheme, the change management message frame is generated and sent, and contains the BSS color value change information, so that communication conflicts among different BSSs are reduced, the station equipment determines the CCA value in time according to the BSS color value, and the receiving and transmitting power of the receiver is also adjusted.
The generating unit 504 may be a processor (CPU), a controller (MCU), an embedded micro-control chip, a baseband processor, and the like of the communication apparatus, and the transmitting unit 506 may be a master transceiver and/or a slave transceiver (such as an antenna and a carrier modulation module, and the like) of the communication apparatus.
In the technical solution, preferably, the method further includes: a writing unit 508, configured to set the BSS color value change information written in the change management message frame to be unencrypted when the change management message frame is unicast, multicast, or broadcast.
In the technical scheme, because the basic service set provided by the invention is suitable for the associated communication scene and the non-associated communication scene, when the change management message frame is unicast or multicast or broadcast, the BSS color value change information written in the change management message frame is set to be not encrypted, so that all access point devices in the OBSS can analyze the BSS color value change information, the occurrence of communication conflicts in the OBSS is reduced to the greatest extent, and the spectrum utilization rate and the throughput of the basic service set are improved.
The writing unit 508 may be a parser, a processor (CPU), a controller (MCU), an embedded micro-controller chip, a baseband processor, etc. of the communication device.
In the technical solution, preferably, the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
In this technical solution, the change management message frame is one of a Beacon frame (i.e., Beacon), a Probe response frame (i.e., Probe response), and an association response frame (i.e., (re) association response).
It is to be noted that the communication apparatus may be compatible with or integrated with a mobile phone, a tablet computer, a music playing apparatus, a navigation apparatus, and other station devices having a Wi-Fi communication module, the receiving unit 402 may be a master transceiver and/or a slave transceiver (such as an antenna and a carrier modulation module) of the communication apparatus, the determining unit 404 may be a processor (CPU), a controller (MCU), an embedded micro-control chip, a baseband processor, and the like of the communication apparatus, and the transmitting unit 406 may be a master transceiver and/or a slave transceiver (such as an antenna and a carrier modulation module) of the communication apparatus.
Fig. 6 shows a schematic block diagram of a station device according to an embodiment of the invention.
As shown in fig. 6, the station apparatus 600 according to an embodiment of the present invention includes the communication device 400 of the wireless lan proposed in any one of the technical solutions of fig. 4, and therefore has all the technical effects of the communication device 400 of the wireless lan.
Fig. 7 shows a schematic block diagram of an access point device according to an embodiment of the invention.
As shown in fig. 7, an access point device 700 according to an embodiment of the present invention includes a communication apparatus 500 of a wireless lan according to any one of the technical solutions of fig. 5, and therefore has all the technical effects of the communication apparatus 500 of the wireless lan.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The units in the terminal of the embodiment of the invention can be merged, divided and deleted according to actual needs.
It will be understood by those of ordinary skill in the art that all or part of the steps of the various methods of the embodiments may be implemented by instructions associated with hardware, which may be stored in a computer-readable storage medium, such as Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc-Read Only Memory (CD-ROM), or other Memory, magnetic disk, magnetic tape, or magnetic tape, Or any other medium which can be used to carry or store data and which can be read by a computer.
The technical scheme of the present invention is described in detail above with reference to the accompanying drawings, and in view of the technical problem of BSS color value change in a wireless local area network proposed in the related art, the present invention proposes a communication scheme of a wireless local area network, wherein a change stop frame is generated and transmitted to instruct an access point device to stop changing a BSS color value or a change request frame is generated and transmitted to instruct the access point device to change the BSS color value again by determining that BSS color value change information of at least two change management message frames in a plurality of change management message frames is the same, so as to optimize a change mechanism of a BSS color value, and the communication scheme is particularly suitable for a station device in an OBSS, thereby improving reliability and efficiency of changing the BSS color value, reducing occurrence of communication conflicts, and improving a spectrum utilization rate and throughput of a basic service set.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to 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 (16)

1. A communication method of a wireless local area network is applicable to station equipment, and is characterized in that the communication method of the wireless local area network comprises the following steps:
receiving a plurality of change management message frames, wherein the change management message frames contain BSS color value change information, and the BSS color value change information contains changed BSS color values;
if it is determined that the BSS color value change information of at least two change management message frames in the plurality of change management message frames is the same;
generating and transmitting a change stop frame to instruct the access point device to stop changing the BSS color value, or generating and transmitting a change request frame to instruct the access point device to change the BSS color value again;
the BSS color value change information further comprises a BSS color value change countdown counter value, and the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value.
2. The communication method of the wireless local area network according to claim 1, further comprising:
if it is detected that the BSS color values of at least two change management message frames in the change management message frames are the same, determining a plurality of access point devices with the same BSS color value;
determining an access point device which completes the BSS Color value change firstly in the plurality of access point devices as a first access point device according to the BSS Color value change countdown counter value of the plurality of access point devices, and determining an access point device which does not complete the BSS Color value change in the plurality of access point devices as a second access point device;
and generating and sending the change stop frame to the second access point device to indicate the second access point device to stop changing the BSS color value.
3. The communication method of the wireless local area network according to claim 1, further comprising:
if detecting that at least two BSS color value change information in the plurality of change management message frames are the same, generating and sending the change request frame to instruct the access point equipment to change the BSS color value again,
and the BSS color value change information indicates that the BSS color value is equal to the BSS color value change countdown counter value.
4. A communication method of a wireless local area network is applicable to an access point device, and is characterized in that the communication method of the wireless local area network comprises the following steps:
and receiving a change stop frame or a change request frame, wherein the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, and the change request frame is used for indicating to change the BSS color value again.
5. The communication method of the wireless local area network according to claim 4, further comprising:
generating a change management message frame, wherein the change management message frame contains BSS color value change information;
the change management message frame is transmitted,
wherein the BSS color value change information includes the BSS color value change countdown value and a BSS color value.
6. The communication method of the wireless local area network according to claim 5, further comprising:
and when the change management message frame is unicast or multicast or broadcast, setting the BSS color value change information written in the change management message frame not to be encrypted.
7. The communication method of the wireless local area network according to any one of claims 1 to 6,
the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
8. A communication apparatus of a wireless local area network, adapted to a station device, the communication apparatus of the wireless local area network comprising:
a receiving unit, configured to receive multiple change management message frames, where BSS color value change information is set in the change management message frames, and the BSS color value change information includes a changed BSS color value;
a determining unit, configured to determine that the BSS color value change information of at least two change management message frames of the plurality of change management message frames is the same;
a sending unit, configured to generate and send a change stop frame to instruct an access point device to stop changing the BSS color value, or generate and send a change request frame to instruct the access point device to change the BSS color value again;
the BSS color value change information further comprises a BSS color value change countdown counter value, and the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value.
9. The communication device of the wireless local area network according to claim 8,
the determination unit is further configured to: if it is detected that the BSS color values of at least two change management message frames in the change management message frames are the same, determining a plurality of access point devices with the same BSS color value;
the determination unit is further configured to: determining an access point device which completes the BSS Color value change firstly in the plurality of access point devices as a first access point device according to the BSS Color value change countdown counter value of the plurality of access point devices, and determining an access point device which does not complete the BSS Color value change in the plurality of access point devices as a second access point device;
the sending unit is further configured to: and generating and sending the change stop frame to the second access point device to indicate the second access point device to stop changing the BSS color value.
10. The communication device of the wireless local area network according to claim 8,
the determination unit is further configured to: if detecting that at least two BSS color value change information in the plurality of change management message frames are the same, generating and sending the change request frame to instruct the access point equipment to change the BSS color value again,
and the BSS color value change information indicates that the BSS color value is equal to the BSS color value change countdown counter value.
11. A communication apparatus of a wireless local area network, adapted to an access point device, the communication apparatus of the wireless local area network comprising:
and the receiving unit is used for receiving a change stop frame or a change request frame, the change stop frame is used for indicating to stop the countdown of the BSS color value change countdown counter value so as to stop changing the BSS color value, and the change request frame is used for indicating to change the BSS color value again.
12. The communications apparatus of wireless local area network according to claim 11, further comprising:
a generating unit, configured to generate a change management message frame, where the change management message frame includes BSS color value change information;
a transmitting unit for transmitting the change management message frame,
wherein the BSS color value change information includes the BSS color value change countdown value and a BSS color value.
13. The communications apparatus of wireless local area network according to claim 12, further comprising:
and the writing unit is used for setting the BSS color value change information written in the change management message frame not to be encrypted when the change management message frame is unicast, multicast or broadcast.
14. The communication apparatus of a wireless local area network according to any one of claims 8 to 13,
the change management message frame is one of a beacon frame, a probe response frame, and an association response frame.
15. A station apparatus, comprising:
communication device of a wireless local area network according to any of claims 8 to 10.
16. An access point device, comprising:
communication device of a wireless local area network according to any of claims 11 to 13.
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