CN111342914A - Communication management method and device - Google Patents
Communication management method and device Download PDFInfo
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- CN111342914A CN111342914A CN201811553605.8A CN201811553605A CN111342914A CN 111342914 A CN111342914 A CN 111342914A CN 201811553605 A CN201811553605 A CN 201811553605A CN 111342914 A CN111342914 A CN 111342914A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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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
- H04L5/0058—Allocation criteria
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a communication management method and device, and belongs to the technical field of wireless communication. The method is applied to the AP, the AP comprises a first network card and a second network card, and the method comprises the following steps: receiving and transmitting service messages on a service channel through a first network card; determining at least one interference channel in other channels based on the channel evaluation information of the other channels acquired by the second network card, wherein the other channels are channels except the service channel; and sending a specified message on the spectrum resource of at least one interference channel through a second network card, wherein the specified message carries a duration field, and the second network card prohibits sending other messages on the spectrum resource of at least one interference channel within the period of time declared by the duration field. According to the AP communication method and the AP communication device, the second network card occupies the interference channel, so that the load of the interference channel is reduced, and the AP communication quality is improved.
Description
Technical Field
The present application relates to the field of wireless communications technologies, and in particular, to a communication management method and apparatus.
Background
Wireless fidelity (wifi) networks employ standards of the Institute of Electrical and Electronics Engineers (IEEE) 802.11 family of standards. The working frequency bands of the wifi network at present include a 2.4GHz (gigahertz) frequency band and a 5GHz frequency band. The channels within the range of 2.4GHz frequency band all have overlapped frequency channels and adjacent frequency channels, and the channels within the range of 5GHz frequency band all have adjacent frequency channels. The overlapped channel of the channel refers to a channel with a spectrum range overlapped with a spectrum range of the channel, and the adjacent channel of the channel refers to a channel with a spectrum range adjacent to the spectrum range of the channel.
At present, collision avoidance of wifi air interfaces (air interface collision refers to packet transmission collision caused by multiple network devices in the same network simultaneously transmitting messages on one channel) is realized by combining a physical carrier monitoring mechanism and a virtual carrier monitoring mechanism. The physical carrier monitoring is implemented by a physical layer based on a Clear Channel Assessment (CCA) algorithm, and is used for detecting whether a current Channel is busy; the virtual carrier sensing is implemented by a Medium Access Control (MAC) layer based on a Network Allocation Vector (NAV), where the NAV declares a time that a channel needs to be occupied in the future in a duration field of a packet, and after an Access Point (AP) receives and parses the packet, the access point establishes a NAV based on the declaration of the duration field and stops sending the packet on a corresponding channel within the duration field, that is, the virtual carrier sensing is used to determine a future busy time of the channel.
However, when the AP transmits the message on the traffic channel, the AP may be interfered by the message transmitted on another channel (e.g., an adjacent channel or an overlapped channel), so that the communication reliability of the AP in the related art is low.
Disclosure of Invention
The embodiment of the application provides a communication management method and device, which can solve the problem of low communication reliability of an AP in the related art. The technical scheme is as follows:
in a first aspect, a communication management method is provided, which is applied to an AP, where the AP includes a first network card and a second network card, and the method includes:
receiving and transmitting service messages on a service channel through a first network card; determining at least one interference channel in other channels based on the channel evaluation information of the other channels acquired by the second network card, wherein the other channels are channels except the service channel; and sending a specified message on the spectrum resource of the at least one interference channel through a second network card, wherein the specified message carries a duration field, and the second network card prohibits sending other messages on the spectrum resource of the at least one interference channel within a period of time declared by the duration field.
It should be noted that, in the present application, the designated message is sent on the spectrum resource of the interference channel through the second network card, so as to occupy the interference channel. Because the interference device keeps silent in the time period declared by the duration field of the designated message based on the virtual carrier monitoring mechanism, and the second network card prohibits sending other messages on the spectrum resource of the interference channel in the time period declared by the duration field of the designated message, the load of the interference channel can be reduced, the interference of the interference channel on the service channel is reduced, and the communication quality of the AP is improved.
In a first possible implementation manner of the first aspect, the method further includes: and periodically scanning the channels of the other channels through the second network card to acquire the channel evaluation information of each channel in the other channels in the scanning period.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the periodically scanning, by the second network card, the channels of other channels includes:
determining the scanning time of each channel in other channels in the current scanning period based on the channel evaluation information of each channel in other channels acquired in the last scanning period; and based on the scanning time of each channel in other channels, scanning each channel in other channels in the current scanning period through the second network card.
With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the channel estimation information includes at least one of the number of APs carried by the channel, a received signal strength indication of each AP carried by the channel, and a channel duty cycle; determining the scanning time of each channel in other channels in the current scanning period based on the channel evaluation information of each channel in other channels acquired in the last scanning period, including:
calculating a channel assessment value of the target channel according to the channel assessment information of the target channel and the number of the target channel from the traffic channel, wherein the channel assessment value is positively correlated with each parameter value in the channel assessment information and negatively correlated with the number of the target channel from the traffic channel, and the target channel is any one of other channels; and determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
It should be noted that, as the load of the target channel is larger, the closer the target channel is to the traffic channel of the AP (for example, the adjacent channel and the overlapped channel of the traffic channel), the higher the interference degree of the target channel to the traffic channel of the AP, so that the scanning time of the target channel is determined based on the channel estimation information of the target channel and the number of channels of the target channel from the traffic channel, and the interference channel that may cause large interference to the traffic channel may be focused, thereby achieving effective monitoring of the interference channel.
With reference to any one of the first to third possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, after the service packet is sent on the service channel through the first network card, the method further includes:
acquiring service state information of a service channel through a first network card; and determining the communication quality of the AP based on the service state information of the service channel.
Sending a designated message on the spectrum resource of at least one interference channel through a second network card, wherein the designated message comprises the following steps:
and when the communication quality of the AP does not reach the communication quality standard, sending a specified message on the frequency spectrum resource of at least one interference channel through the second network card.
With reference to the fourth possible implementation manner of the first aspect, in a fifth possible implementation manner of the first aspect, after determining the communication quality of the AP, the method further includes:
and when the communication quality of the AP reaches the communication quality standard, prohibiting the second network card from sending a specified message on the frequency spectrum resource of at least one interference channel.
With reference to any one of the first to fifth possible implementation manners of the first aspect, in a sixth possible implementation manner of the first aspect, the determining at least one interference channel in other channels based on the channel estimation information of the other channels acquired by the second network card includes:
determining the interference degree of each channel in other channels to the service channel based on the channel evaluation information of other channels;
and acquiring at least one interference channel with the highest interference degree on the traffic channel from other channels.
With reference to any one of the first to sixth possible implementation manners of the first aspect, in a seventh possible implementation manner of the first aspect, the method further includes:
and determining a service channel according to the channel evaluation information of all channels acquired by the second network card in the appointed time period.
With reference to any one of the first to seventh possible implementation manners of the first aspect, in an eighth possible implementation manner of the first aspect, the designated message is a request to send RTS message.
With reference to any one of the first to eighth possible implementation manners of the first aspect, in a ninth possible implementation manner of the first aspect, the service state information includes at least one of a packet loss rate, a queue depth of a packet to be sent, and a service priority.
In a second aspect, a communication management apparatus is provided, which is applied to an access point device AP, where the AP includes a first network card and a second network card, and the apparatus includes:
the receiving and sending module is used for receiving and sending the service message on a service channel through the first network card;
a first determining module, configured to determine at least one interference channel in other channels based on channel estimation information of the other channels acquired by the second network card, where the other channels are channels other than the traffic channel;
a sending module, configured to send a specified packet on the spectrum resource of the at least one interference channel through the second network card, where the specified packet carries a duration field, and the second network card prohibits sending other packets on the spectrum resource of the at least one interference channel within a time period declared by the duration field.
Optionally, the apparatus further comprises:
and the channel scanning module is used for periodically scanning the channels of the other channels through the second network card so as to acquire the channel evaluation information of each channel in the other channels in a scanning period.
Optionally, the channel scanning module is further configured to:
determining the scanning time of each channel in the other channels in the current scanning period based on the channel evaluation information of each channel in the other channels acquired in the last scanning period;
and based on the scanning time of each channel in the other channels, scanning each channel in the other channels in the current scanning period through the second network card.
Optionally, the channel assessment information includes at least one of the number of APs carried by the channel, a received signal strength indication of each AP carried by the channel, and a channel duty cycle;
the channel scanning module is further configured to:
calculating a channel assessment value of a target channel according to channel assessment information of the target channel and the number of the target channel from the traffic channel, wherein the channel assessment value is positively correlated with each parameter value in the channel assessment information and negatively correlated with the number of the target channel from the traffic channel, and the target channel is any one of the other channels;
and determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
Optionally, the apparatus further comprises:
the acquisition module is used for acquiring the service state information of the service channel through the first network card;
a second determining module, configured to determine, based on the traffic state information of the traffic channel, the communication quality of the AP;
the sending module is configured to:
and when the communication quality of the AP does not reach the communication quality standard, sending the specified message on the frequency spectrum resource of the at least one interference channel through the second network card.
Optionally, the sending module is further configured to prohibit the second network card from sending the designated packet on the spectrum resource of the at least one interference channel when the communication quality of the AP reaches the communication quality standard.
Optionally, the first determining module is configured to:
determining the interference degree of each channel in the other channels to the service channel based on the channel evaluation information of the other channels;
and acquiring at least one interference channel with the highest interference degree on the traffic channel from the other channels.
Optionally, the apparatus further comprises:
and the third determining module is used for determining the service channel according to the channel evaluation information of all the channels acquired by the second network card in the specified time period.
Optionally, the specified message is a request to send RTS message.
Optionally, the service state information includes at least one of a packet loss rate, a queue depth of a packet to be sent, and a service priority.
In a third aspect, an AP is provided, where the AP includes a processor and at least two network cards, where the at least two network cards include a first network card and a second network card;
the first network card is used for executing the step of receiving and sending the service message in the method of any one of the first aspect;
the second network card is used for executing the transceiving steps except for transceiving the service message in the method of any one of the first aspect;
the processor is adapted to perform the processing steps of the method of any of the first aspects.
In a fourth aspect, there is provided a computer-readable storage medium having stored thereon instructions which, when executed by a processor, implement the communication management method according to any one of the first aspect.
In a fifth aspect, a chip is provided, the chip comprising programmable logic circuits and/or program instructions, which when run, implement the communication management method according to any of the first aspects.
The beneficial effects that technical scheme that this application embodiment provided brought include:
and the AP receives and transmits the service message on the service channel through the first network card, determines an interference channel based on the channel evaluation information of other channels acquired through the second network card, and transmits a specified message on the frequency spectrum resource of the interference channel through the second network card to occupy the interference channel. Because the interference device keeps silent in the time period declared by the duration field of the specified message based on the virtual carrier monitoring mechanism, and the second network card prohibits sending other messages on the spectrum resource of the interference channel in the time period declared by the duration field of the specified message, the load of the interference channel can be reduced, the interference of the interference channel on the service channel is reduced, the communication quality of the AP is improved, and the communication reliability of the AP is ensured.
Drawings
Fig. 1 is a schematic structural diagram of an implementation environment to which a communication management method provided in an embodiment of the present application is applied;
FIG. 2 is a schematic diagram of channel division in the 2.4GHz band;
fig. 3 is a schematic structural diagram of an AP provided in an embodiment of the present application;
fig. 4 is a flowchart of a communication management method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a communication management apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another communication management apparatus provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of another communication management apparatus provided in an embodiment of the present application;
fig. 8 is a schematic structural diagram of another communication management apparatus according to an embodiment of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an implementation environment to which the communication management method provided in the embodiment of the present application is applied, and as shown in fig. 1, the implementation environment includes an AP10, at least one interfering device 20, and at least one Station (STA) 30. The implementation environment shown in fig. 1 is illustrated as including an interfering device 20 and a STA 30.
Alternatively, the interfering device 20 may be another AP. In the embodiment of the present application, the AP may be a terminal device or a network device with a wireless network card (also referred to as a wifi chip), for example, the AP may be a wifi repeater, a router, a switch, a network bridge, or a smart phone. STA30 may be a computer or a cell phone, etc. AP10 is used to provide network traffic services to STA30, i.e., AP10 is used to transmit traffic packets to STA30 via a traffic channel.
It should be noted that the traffic channel of the AP10 is different from the traffic channel of the interfering device 20, that is, the spectrum range of the traffic channel of the AP10 is different from the spectrum range of the traffic channel of the interfering device 20.
For example, assume that both AP10 and interfering device 20 operate in the 2.4GHz band. Fig. 2 is a schematic diagram of channel division in a 2.4GHz band, as shown in fig. 2, the 2.4GHz band ranges from 2400MHz to 2497MHz, and includes 14 channels (1 to 14), a frequency bandwidth of each channel is 22MHz, each channel has a superimposed channel and an adjacent channel, for example, channel 2, channel 3, channel 4, and channel 5 are superimposed channels of channel 1, and channel 6 is an adjacent channel of channel 1. The traffic channel of AP10 may be any one of the 14 channels, for example, if the traffic channel of AP10 is channel 1, the traffic channel of interfering device 20 may be any one of channels 2 to 14. When the interfering device transmits a message on its traffic channel, which interferes with the message transmission of the AP10, the traffic channel of the interfering device 20 is an interfering channel for the AP 10.
Fig. 3 is a schematic structural diagram of an AP provided in an embodiment of the present application, and as shown in fig. 3, the AP10 includes a processor 101 and at least two network cards, where the at least two network cards include a first network card 102 and a second network card 103. The first network card 102 is used for executing the steps of receiving and sending the service message in the receiving and sending steps that the AP needs to execute. The second network card 103 is configured to perform transceiving steps, other than transceiving service messages, of the transceiving steps that the AP needs to perform, for example, the second network card 103 is configured to perform channel scanning to obtain channel state information of each channel; for another example, the second network card 103 may also be used to send a designated message on the interference channel to compete with the interfering device 20 for the interference channel. The processor 101 is configured to execute processing steps required to be executed by the AP. The present application describes in detail the steps performed by each structure in the AP in the following method embodiments.
Optionally, the network cards in the AP10 may all be dual-frequency network cards, and all the network cards in the AP10 may simultaneously operate in a 2.4GHz band or a 5GHz band, which is not limited in this embodiment of the present application.
Fig. 4 is a flowchart of a communication management method provided in an embodiment of the present application, and is applied to the AP10 in the implementation environment shown in fig. 1, where as shown in fig. 4, the method includes:
Optionally, the receiving and sending of the service packet by the first network card on the service channel includes: the first network card receives the service message on the service channel, and/or the first network card sends the service message on the service channel.
Optionally, the AP periodically acquires the service state information of the service channel through the first network card, for example, a timer may be set in the AP, and the timer periodically triggers the AP to acquire the service state information of the service channel at the current time. Or, when receiving the decision instruction, the AP acquires the service state information of the service channel through the first network card, where the decision instruction may be triggered by the user. The embodiment of the present application does not limit the triggering manner for the AP to acquire the service state information of the service channel.
Optionally, the service state information includes at least one of a packet loss rate, a queue depth of a packet to be sent, and a service priority. The packet loss rate refers to a ratio of a loss number of the service messages sent by the AP in a certain period to a total service message number, and a higher packet loss rate indicates a worse service state of the AP, whereas a lower packet loss rate indicates a better service state of the AP. The depth of the message queue to be sent represents the number of messages to be sent at the current moment, and the depth of the message queue to be sent is used for reflecting whether queue blockage occurs or not, for example, when the depth of the message queue to be sent is greater than a specified depth threshold, the AP determines that the current queue is blocked. The service priority represents the priority of the service message transmitted on the current service channel, and the higher the service priority, the higher the transmission reliability requirement for the service message is, for example, the service priority of the game data is higher. The service state information may also include other information that can reflect the service status of the AP, for example, packet loss delay and the like.
Optionally, the communication quality of the AP may be determined based on at least one of a packet loss rate of a traffic channel, a queue depth of a packet to be sent, and a traffic priority.
For example, the communication quality of the AP may be hierarchically divided based on the service priority, and then the communication quality hierarchy to which the current AP belongs is determined based on the packet loss rate of the service channel and the depth of the queue of the packet to be sent, so as to determine the communication quality of the AP. For example, the first packet loss rate threshold d1 and the second packet loss rate threshold d2, and the first depth threshold s1 and the second depth threshold s2, d1< d2, s1< s2 may be set based on the traffic priority. Determining the communication quality of the AP based on the packet loss rate d of the service channel and the queue depth s of the message to be sent, wherein the method comprises the following steps: determining that the communication quality of the current AP is superior when d < d1 and s < s 1; when d > d2 or s > s2, determining that the communication quality of the current AP is poor; otherwise, determining the communication quality of the current AP to be medium. The communication quality hierarchy division standards corresponding to different service priorities are different, and the higher the service priority is, the higher the requirement on the transmission reliability of the service packet is, so the set packet loss rate threshold and the depth threshold should be smaller.
Optionally, when the AP periodically acquires the service state information of the service channel through the first network card, the AP may determine the communication quality of the AP in the communication period based on the service state information in the communication period.
Optionally, the channel estimation information includes at least one of the number of APs carried by the channel, a Received Signal Strength Indication (RSSI) of each AP carried by the channel, and a duty cycle of the channel. The channel estimation information may further include other parameters capable of reflecting the channel load condition, and the parameters included in the channel estimation information are not limited in this embodiment. Wherein the duration of the scanning period may be greater than the duration of the communication period mentioned in step 403.
Optionally, a scanning timer may be set in the AP, and the scanning timer periodically triggers the second network card to perform channel scanning on each channel, so as to update the channel estimation information acquired by the AP.
In an optional embodiment of the present application, the implementation process of step 404 described above includes: determining the scanning time of each channel in other channels in the current scanning period based on the channel evaluation information of each channel in other channels acquired in the last scanning period; and based on the scanning time of each channel in other channels, scanning each channel in other channels in the current scanning period through the second network card.
Optionally, the implementation process of determining the scanning time of each of the other channels in the current scanning period based on the channel estimation information of each of the other channels acquired in the previous scanning period includes:
s41, calculating the channel estimation value of the target channel according to the channel estimation information of the target channel and the number of the target channel from the traffic channel, wherein the target channel is any one of other channels.
The number of the target channel from the traffic channel is positively correlated with the interference degree of the target channel to the traffic channel. For example, the number of adjacent channels or superimposed channels of the traffic channel from the traffic channel is small, and the interference to the traffic channel is large.
And S42, determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
The channel estimation value is positively correlated with each parameter value in the channel estimation information, and is negatively correlated with the number of channels of the target channel from the service channel. That is, the more the number of APs carried by the target channel, the higher the RSSI of each AP carried by the target channel, the larger the duty cycle of the target channel, and the smaller the number of channels between the target channel and the traffic channel, the larger the channel estimation value of the target channel.
For example, assuming that the channel evaluation value of the target channel is I, the sum of the channel evaluation values of channels other than the traffic channel of the AP (including the target channel) is IallIf the scanning time corresponding to the target channel occupies the time percentage in the scanning period as I/IallWhen the total duration of the scanning period is T, the scanning time of the second network card to the target channel in the scanning period is T × I/Iall. In this embodiment of the present application, a maximum time percentage and a minimum time percentage of the scanning time of each channel in the scanning period may be set, and when it is determined that the time percentage of the scanning time of the target channel in the scanning period is greater than the maximum time percentage, the time percentage of the scanning time of the target channel in the scanning period is set to the maximum time percentage; setting the time percentage of the scanning time of the target channel in the scanning period as the maximum when the time percentage of the scanning time of the target channel in the scanning period is determined to be less than the minimum time percentageA small percentage of time to ensure that the second network card can effectively channel scan each of the other channels.
Optionally, in the embodiment of the present application, the channels may be classified in a fuzzy manner according to the size of the channel estimation value, the scanning times corresponding to different classes are different, the scanning time corresponding to each class may be preset, or may be determined according to an actual channel state, which is not limited in the embodiment of the present application. For example, the channels may be classified into four categories, A, B, C and D, according to the size of the channel estimation value, and after the channel estimation value of the target channel is calculated, the category to which the target channel belongs may be determined based on the channel estimation value of the target channel, and then the corresponding scanning time may be acquired.
It should be noted that, when the channel load is larger, the distance between the channel and the traffic channel of the AP is closer (for example, an adjacent channel and an overlapped channel of the traffic channel), the degree of interference of the channel to the traffic channel of the AP is higher, and the scanning time of the channel in the scanning period is determined based on the channel estimation value, so that an attention can be paid to an interference channel which may cause large interference to the traffic channel, and further, effective channel monitoring on other channels is achieved.
In another alternative embodiment of the present application, the implementation of step 404 includes: in each scanning period, the second network card performs isochronous scanning on each channel in the other channels, that is, the scanning time of the second network card on each channel in the other channels is the same, which is not limited in this embodiment of the present application.
In the embodiment of the application, the first network card is used for receiving and sending the service message on the service channel, and the second network card is used for scanning the channel.
Optionally, based on the channel estimation information of each channel continuously acquired by the second network card in a specified time period, load information of each channel at different times may be acquired. For the home network, the load information of each channel at different times has reference value for the AP to select a traffic channel, for example, the load of a certain channel is low in the daytime, and the load of the channel is high at night, so that the AP can select the channel as the traffic channel in the daytime and select other channels with relatively low loads as the traffic channels at night when selecting the traffic channel, so as to avoid the high-load channel and ensure the communication quality of the AP in different periods.
Optionally, the AP may determine the traffic channel according to the channel estimation information of all channels acquired by the second network card in the specified time period.
It should be noted that the channel estimation information obtained by the AP may be used to mine the user requirement. For example, when the channel estimation information reflects that the communication quality of the 5GHz band is better than that of the 2.4GHz band, the user may be recommended to use the device with the working band at 5 GHz. The channel assessment information acquired by the AP may also be used for channel health assessment, algorithm package upgrade assessment, and the like, and the application range of the channel assessment information is not limited in the embodiments of the present application.
Optionally, the second network card may be a dual-frequency network card, and the second network card may monitor channels in a 2.4GHz frequency band and a 5GHz frequency band; the second network card may also be a single-frequency network card, which is not limited in this application embodiment.
Optionally, the AP may determine, based on the channel estimation information of the other channels, an interference degree of each channel in the other channels to the traffic channel; and acquiring at least one interference channel with the highest interference degree on the traffic channel from other channels. For example, the interference channel may be an adjacent channel or a superimposed channel of the traffic channel.
Alternatively, the channel estimation value of each channel may be calculated based on the channel estimation information of each channel, and at least one interference channel having the highest degree of interference with the target channel may be determined from the channel estimation values. The determining manner of the channel estimation value may refer to step 404, which is not described herein again in this embodiment of the present application.
Optionally, when the communication quality of the AP does not reach the communication quality standard, the specified packet is sent on the spectrum resource of the at least one interference channel through the second network card. And when the communication quality of the AP reaches the communication quality standard, prohibiting the second network card from sending the specified message on the frequency spectrum resource of at least one interference channel. The designated message may be a management message, such as a Request To Send (RTS) message, or a data message, and the message type of the designated message is not limited.
For example, when the packet loss rate of the traffic channel of the AP reaches a certain packet loss rate threshold, and/or the depth of the queue of the packet to be sent in the AP reaches a certain depth threshold, it is determined that the communication quality of the AP does not reach the communication quality standard. Referring to the example in step 403, when the current service priority is higher, if the communication quality of the AP does not reach the optimal level, it may be determined that the communication quality of the AP does not reach the communication quality standard; when the current service priority is low, if the communication quality of the AP does not reach the optimum or the medium, it may be determined that the communication quality of the AP does not reach the communication quality standard. In the embodiment of the present application, a communication quality standard may be formulated according to an actual service condition, which is not limited.
Optionally, the process of sending, by the AP, the specified packet on the spectrum resource of the at least one interference channel through the second network card includes: the second network card detects the energy of the interference channel based on CCA to determine whether the interference channel is busy currently; and when the interference channel is determined not to be busy at present, entering a packet sending competition window, and sending a specified message on the frequency spectrum resource of the interference channel, wherein the specified message is used for declaring to occupy the channel, and the duration (duration) field of the specified message carries the time for occupying the channel.
It should be noted that, the second network card sends the specified packet on the spectrum resource of the interference channel, and since the specified packet is declared to occupy the interference channel in the specified period in the future, the interference device keeps silent in the period declared by the duration field of the specified packet based on the virtual carrier monitoring mechanism, or the interference device can switch the traffic channel, so that the load of the interference channel can be reduced, the interference of the interference channel on the traffic channel of the AP is reduced, and the communication quality of the AP is improved.
The communication management method provided by the embodiment of the application can play a good anti-interference role on the service channel, and can be widely applied to services with high requirements on reliability and real-time performance. For example, the communication management method can be applied to services such as audio and video, games, and Virtual Reality (VR). By reducing the load of the interference channel, the message transmitted on the service channel is protected, the reliability and retransmission real-time performance of the wifi link can be improved, the phenomena of screen splash and blocking of the video are reduced, and the user experience is greatly improved.
It should be noted that, the order of the steps of the communication management method provided in the embodiment of the present application may be appropriately adjusted, for example, step 404 and step 405 may also be executed before step 403, and the steps may also be increased or decreased according to the situation, for example, step 403 may also not be executed. Any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application is covered by the protection scope of the present application, and thus the detailed description thereof is omitted.
To sum up, in the communication management method provided in this embodiment of the present application, the AP receives and sends a service packet on a service channel through the first network card, determines an interference channel based on channel estimation information of other channels acquired through the second network card, and sends a specified packet on a spectrum resource of the interference channel through the second network card to occupy the interference channel. Because the interference device keeps silent in the time period declared by the duration field of the specified message based on the virtual carrier monitoring mechanism, and the second network card prohibits sending other messages on the spectrum resource of the interference channel in the time period declared by the duration field of the specified message, the load of the interference channel can be reduced, the interference of the interference channel on the service channel is reduced, the communication quality of the AP is improved, and the communication reliability of the AP is ensured.
In addition, the embodiment of the present application further provides a new channel scanning mechanism, because the larger the load of the target channel is, the closer the distance between the target channel and the service channel of the AP is (for example, an adjacent channel and a superimposed channel of the service channel), the higher the interference degree of the target channel on the service channel of the AP is, so that the scanning time of the target channel is determined based on the channel estimation information of the target channel and the number of channels of the target channel from the service channel, and the interference channel that may cause large interference on the service channel can be focused, thereby implementing effective monitoring on the interference channel.
Fig. 5 is a schematic structural diagram of a communication management apparatus according to an embodiment of the present application, which is applied to the AP10 in the implementation environment shown in fig. 1, where the AP includes a first network card and a second network card, and as shown in fig. 5, the apparatus 50 includes:
the transceiving module 501 is configured to transceive a service packet on a service channel through a first network card.
The first determining module 502 is configured to determine at least one interference channel in other channels based on the channel estimation information of the other channels acquired by the second network card, where the other channels are channels other than the traffic channel.
A sending module 503, configured to send a specified message on the spectrum resource of the at least one interference channel through the second network card, where the specified message carries a duration field, and the second network card prohibits sending other messages on the spectrum resource of the at least one interference channel within a time period declared by the duration field.
To sum up, in the communication management apparatus provided in this embodiment of the present application, the transceiver module transmits and receives a service packet on a service channel through the first network card, the first determining module determines an interference channel based on channel estimation information of other channels acquired through the second network card, and the sending module sends a specified packet on a spectrum resource of the interference channel through the second network card to occupy the interference channel. Because the interference device keeps silent in the time period declared by the duration field of the specified message based on the virtual carrier monitoring mechanism, and the second network card prohibits sending other messages on the spectrum resource of the interference channel in the time period declared by the duration field of the specified message, the load of the interference channel can be reduced, the interference of the interference channel on the service channel is reduced, the communication quality of the AP is improved, and the communication reliability of the AP is ensured.
Optionally, as shown in fig. 6, the apparatus 50 further includes:
the channel scanning module 504 is configured to periodically perform channel scanning on other channels through the second network card to obtain channel estimation information of each of the other channels in a scanning period.
Optionally, the channel scanning module is further configured to:
determining the scanning time of each channel in other channels in the current scanning period based on the channel evaluation information of each channel in other channels acquired in the last scanning period;
and based on the scanning time of each channel in other channels, scanning each channel in other channels in the current scanning period through the second network card.
Optionally, the channel assessment information includes at least one of the number of APs carried by the channel, a received signal strength indication of each AP carried by the channel, and a channel duty cycle;
a channel scanning module further configured to:
calculating a channel assessment value of the target channel according to the channel assessment information of the target channel and the number of the target channel from the service channel, wherein the channel assessment value is positively correlated with each parameter value in the channel assessment information and negatively correlated with the number of the target channel from the service channel, and the target channel is any one of other channels;
and determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
Optionally, as shown in fig. 7, the apparatus 50 further includes:
an obtaining module 505, configured to obtain service state information of a service channel through a first network card;
a second determining module 506, configured to determine the communication quality of the AP based on the traffic state information of the traffic channel.
Correspondingly, the sending module is configured to:
and when the communication quality of the AP does not reach the communication quality standard, sending a specified message on the frequency spectrum resource of at least one interference channel through the second network card.
Optionally, the sending module is further configured to prohibit the second network card from sending the specified packet on the spectrum resource of the at least one interference channel when the communication quality of the AP reaches the communication quality standard.
Optionally, the first determining module is configured to:
determining the interference degree of each channel in other channels to the service channel based on the channel evaluation information of other channels;
and acquiring at least one interference channel with the highest interference degree on the traffic channel from other channels.
Optionally, as shown in fig. 8, the apparatus 50 further comprises:
the third determining module 507 is configured to determine a traffic channel according to the channel assessment information of all channels acquired by the second network card in the specified time period.
Optionally, the designated message is a request to send RTS message.
Optionally, the service state information includes at least one of a packet loss rate, a queue depth of a packet to be sent, and a service priority.
To sum up, in the communication management apparatus provided in this embodiment of the present application, the transceiver module transmits and receives a service packet on a service channel through the first network card, the first determining module determines an interference channel based on channel estimation information of other channels acquired through the second network card, and the sending module sends a specified packet on a spectrum resource of the interference channel through the second network card to occupy the interference channel. Because the interference device keeps silent in the time period declared by the duration field of the specified message based on the virtual carrier monitoring mechanism, and the second network card prohibits sending other messages on the spectrum resource of the interference channel in the time period declared by the duration field of the specified message, the load of the interference channel can be reduced, the interference of the interference channel on the service channel is reduced, the communication quality of the AP is improved, and the communication reliability of the AP is ensured.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
An embodiment of the present application provides a computer-readable storage medium, which stores instructions that, when executed by a processor, implement the communication management method shown in fig. 4.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The above description is only exemplary of the present application and should not be taken as limiting, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (22)
1. A communication management method is applied to an Access Point (AP) device, wherein the AP device comprises a first network card and a second network card, and the method comprises the following steps:
receiving and transmitting service messages on a service channel through the first network card;
determining at least one interference channel in other channels based on channel evaluation information of the other channels acquired by the second network card, wherein the other channels are channels except the service channel;
and sending a specified message on the spectrum resource of the at least one interference channel through the second network card, wherein the specified message carries a duration field, and the second network card prohibits sending other messages on the spectrum resource of the at least one interference channel within a period of time declared by the duration field.
2. The method of claim 1, further comprising:
and periodically scanning the channels of the other channels through the second network card to acquire channel evaluation information of each channel in the other channels in a scanning period.
3. The method of claim 2, wherein the periodically scanning the channels for the other channels via the second network card comprises:
determining the scanning time of each channel in the other channels in the current scanning period based on the channel evaluation information of each channel in the other channels acquired in the last scanning period;
and based on the scanning time of each channel in the other channels, scanning each channel in the other channels in the current scanning period through the second network card.
4. The method of claim 3, wherein the channel assessment information comprises at least one of a number of APs carried on a channel, a received signal strength indication of each AP carried on a channel, and a channel duty cycle;
determining, based on the channel estimation information of each of the other channels acquired in the last scanning period, the scanning time of each of the other channels in the current scanning period, including:
calculating a channel assessment value of a target channel according to channel assessment information of the target channel and the number of the target channel from the traffic channel, wherein the channel assessment value is positively correlated with each parameter value in the channel assessment information and negatively correlated with the number of the target channel from the traffic channel, and the target channel is any one of the other channels;
and determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
5. The method according to any one of claims 1 to 4, wherein after said sending a traffic message on a traffic channel via said first network card, said method further comprises:
acquiring the service state information of the service channel through the first network card;
determining the communication quality of the AP based on the service state information of the service channel;
the sending of the designated message on the spectrum resource of the at least one interference channel through the second network card includes:
and when the communication quality of the AP does not reach the communication quality standard, sending the specified message on the frequency spectrum resource of the at least one interference channel through the second network card.
6. The method of claim 5, wherein after the determining the communication quality of the AP, the method further comprises:
and when the communication quality of the AP reaches the communication quality standard, prohibiting the second network card from sending the specified message on the frequency spectrum resource of the at least one interference channel.
7. The method according to any one of claims 1 to 6, wherein the determining at least one interference channel among the other channels based on the channel estimation information of the other channels acquired by the second network card comprises:
determining the interference degree of each channel in the other channels to the service channel based on the channel evaluation information of the other channels;
and acquiring at least one interference channel with the highest interference degree on the traffic channel from the other channels.
8. The method of any of claims 1 to 7, further comprising:
and determining the service channel according to the channel evaluation information of all channels acquired by the second network card in a specified time period.
9. The method according to any of claims 1 to 8, wherein the specified message is a request to send RTS message.
10. The method according to any one of claims 1 to 9,
the service state information includes at least one of packet loss rate, queue depth of a message to be sent, and service priority.
11. A communication management device is applied to an Access Point (AP), wherein the AP comprises a first network card and a second network card, and the device comprises:
the receiving and sending module is used for receiving and sending the service message on a service channel through the first network card;
a first determining module, configured to determine at least one interference channel in other channels based on channel estimation information of the other channels acquired by the second network card, where the other channels are channels other than the traffic channel;
a sending module, configured to send a specified packet on the spectrum resource of the at least one interference channel through the second network card, where the specified packet carries a duration field, and the second network card prohibits sending other packets on the spectrum resource of the at least one interference channel within a time period declared by the duration field.
12. The apparatus of claim 11, further comprising:
and the channel scanning module is used for periodically scanning the channels of the other channels through the second network card so as to acquire the channel evaluation information of each channel in the other channels in a scanning period.
13. The apparatus of claim 12, wherein the channel scanning module is further configured to:
determining the scanning time of each channel in the other channels in the current scanning period based on the channel evaluation information of each channel in the other channels acquired in the last scanning period;
and based on the scanning time of each channel in the other channels, scanning each channel in the other channels in the current scanning period through the second network card.
14. The apparatus of claim 13, wherein the channel assessment information comprises at least one of a number of APs carried by the channel, a received signal strength indication of each AP carried by the channel, and a channel duty cycle;
the channel scanning module is further configured to:
calculating a channel assessment value of a target channel according to channel assessment information of the target channel and the number of the target channel from the traffic channel, wherein the channel assessment value is positively correlated with each parameter value in the channel assessment information and negatively correlated with the number of the target channel from the traffic channel, and the target channel is any one of the other channels;
and determining the time percentage of the scanning time corresponding to the target channel in the scanning period according to the channel evaluation value of each of the other channels.
15. The apparatus of any of claims 11 to 14, further comprising:
the acquisition module is used for acquiring the service state information of the service channel through the first network card;
a second determining module, configured to determine, based on the traffic state information of the traffic channel, the communication quality of the AP;
the sending module is configured to:
and when the communication quality of the AP does not reach the communication quality standard, sending the specified message on the frequency spectrum resource of the at least one interference channel through the second network card.
16. The apparatus of claim 15,
the sending module is further configured to prohibit the second network card from sending the designated packet on the spectrum resource of the at least one interference channel when the communication quality of the AP reaches the communication quality standard.
17. The apparatus of any one of claims 11 to 16, wherein the first determining module is configured to:
determining the interference degree of each channel in the other channels to the service channel based on the channel evaluation information of the other channels;
and acquiring at least one interference channel with the highest interference degree on the traffic channel from the other channels.
18. The apparatus of any one of claims 11 to 17, further comprising:
and the third determining module is used for determining the service channel according to the channel evaluation information of all the channels acquired by the second network card in the specified time period.
19. The apparatus according to any of claims 11 to 18, wherein the specific message is a request to send RTS message.
20. The apparatus of any one of claims 11 to 19,
the service state information includes at least one of packet loss rate, queue depth of a message to be sent, and service priority.
21. An Access Point (AP) device is characterized in that the AP device comprises a processor and at least two network cards, wherein the at least two network cards comprise a first network card and a second network card;
the first network card is used for executing the steps of receiving and sending the service message in the method of any one of claims 1 to 10;
the second network card is used for executing the transceiving steps except for transceiving the service message in the method of any one of claims 1 to 10;
the processor is configured to perform the processing steps of the method of any one of claims 1 to 10.
22. A computer-readable storage medium having stored thereon instructions which, when executed by a processor, carry out a communication management method according to any one of claims 1 to 10.
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