CN111246500A - Bluetooth channel evaluation method and device for identifying wifi interference and storage medium - Google Patents
Bluetooth channel evaluation method and device for identifying wifi interference and storage medium Download PDFInfo
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- CN111246500A CN111246500A CN201811445839.0A CN201811445839A CN111246500A CN 111246500 A CN111246500 A CN 111246500A CN 201811445839 A CN201811445839 A CN 201811445839A CN 111246500 A CN111246500 A CN 111246500A
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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Abstract
The invention discloses a Bluetooth channel evaluation method, a Bluetooth channel evaluation device and a Bluetooth channel evaluation storage medium for identifying wifi interference, which are used for solving the technical problem that a Bluetooth channel interfered by wifi cannot be evaluated quickly and comprehensively in the prior art. The method comprises the following steps: calculating the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period; selecting wifi interference channels with wifi interference from all wifi channels based on the relationship between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of a single wifi channel and the interference characteristic value of a corresponding adjacent wifi channel; and removing the specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set.
Description
Technical Field
The invention relates to the field of communication, in particular to a Bluetooth channel evaluation method and device for identifying wifi interference and a storage medium.
Background
With the rapid development of the mobile internet technology, Bluetooth and Wi-Fi become visible everywhere and cannot be divided in people's life. Since the frequency Band used by bluetooth is the same as that used by Wi-Fi, and is 2.4G ISM Band (ISM Band), the mutual interference between bluetooth and Wi-Fi is becoming more and more prominent.
In order to effectively reduce and avoid interference, the bluetooth adopts the adaptive frequency hopping technology to select different transmission channels when data transmission is carried out each time, so as to avoid using the transmission channel with stronger signal interference. Although the rules of the adaptive frequency hopping technique have been elaborated in the bluetooth core specification, the rules for evaluating the interference channel are not described or defined at all, but are designed entirely by the manufacturers of the respective terminal bluetooth technology.
Currently, in the process of performing bluetooth communication, manufacturers generally perform statistics on interference characteristic values of each bluetooth channel within a period of time, for example, may determine corresponding interference characteristic values according to a receiving condition on the bluetooth channel, and integrate information such as whether synchronization is performed, whether Header Error Check (HEC) error occurs, whether Cyclic Redundancy Check (CRC) error occurs, RSSI (Received Signal Strength Indication), and the like; then, a channel estimation process is performed on the bluetooth channel during this time. Firstly, filtering and smoothing the characteristic value of each Bluetooth channel, then comparing the processed interference characteristic value of each Bluetooth channel with a set threshold value, and determining whether the Bluetooth channel corresponding to each interference characteristic value is available according to the comparison result.
However, this approach has a disadvantage that only the interference of the bluetooth channel used during the counting period can be avoided at a time, and the bluetooth channel not used during the counting period is likely to be not avoided if there is wifi interference. In addition, because wifi interference does not exist constantly, if wifi interference is just absent at the moment when a certain bluetooth channel works, the final evaluation result can be influenced.
In view of this, how to quickly and comprehensively evaluate the wifi interfered bluetooth channel in the evaluation period becomes a technical problem to be solved urgently.
Disclosure of Invention
The invention provides a method, a device and a storage medium for evaluating a Bluetooth channel for identifying wifi interference, which are used for solving the technical problem that the Bluetooth channel interfered by wifi cannot be evaluated quickly and comprehensively in the prior art.
In a first aspect, to solve the above technical problem, a technical solution of a bluetooth channel estimation method for identifying wifi interference provided in an embodiment of the present invention is as follows:
calculating the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period;
selecting a wifi interference channel with wifi interference from all wifi channels based on the relationship between a preset wifi interference threshold value and an interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of the single wifi channel and an interference characteristic value of a corresponding adjacent wifi channel;
and removing a specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set.
Calculating the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period; selecting wifi interference channels with wifi interference from all wifi channels according to the relationship between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of a single wifi channel and the interference characteristic value of a corresponding adjacent wifi channel; and then, removing a specific Bluetooth channel from part or all of wifi interference channels to obtain an alternative Bluetooth channel set. Therefore, in the current interference evaluation period, the situation that each Bluetooth channel is interfered by wifi can be evaluated quickly and comprehensively, the Bluetooth channel interfered by wifi or the Bluetooth channel with stronger interference by wifi is selected, and the rest Bluetooth channels are used as alternative Bluetooth channels to be selected by the Bluetooth equipment.
Optionally, in the current interference evaluation period, before calculating the interference characteristic value of each wifi channel in all wifi channels, the method further includes:
acquiring wifi interference historical channels with wifi interference in a last evaluation period based on the interference identification of each wifi channel in the last evaluation period;
in the current interference evaluation period, if the interference characteristic value of any Bluetooth channel with the updated interference characteristic value exceeds a Bluetooth interference threshold value in the bandwidth coverage range of one wifi interference historical channel, determining that the wifi interference of the wifi interference historical channel still exists;
if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of the wifi interference historical channel; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of the wifi interference historical channel.
Before evaluating the Bluetooth channel interfered by the wifi in the current interference evaluation period, channel recovery is carried out on the existing wifi interference historical channel not interfered by the wifi or the wifi interference historical channel which is interfered by the wifi and is small, and the accuracy of evaluating the Bluetooth channel interfered by the wifi in the current evaluation period can be effectively ensured.
Optionally, the calculating the interference characteristic value of each wifi channel in all wifi channels includes:
and carrying out sum operation on the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, or carrying out sum operation after weighting the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, so as to obtain the interference characteristic values of all the wifi channels in all the wifi channels.
Optionally, before selecting the wifi interference channel with wifi interference from all the wifi channels, the method further includes:
and sequencing the interference characteristic values of all the wifi channels, and selecting the wifi interference channels with wifi interference from all the wifi channels in sequence.
Optionally, the selecting wifi interference channels with wifi interference from all wifi channels includes:
according to the wifi interference threshold value, determining a wifi interference channel to be determined from all wifi channels;
and based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
Optionally, according to the wifi interference threshold, determining a wifi interference channel to be determined from all wifi channels, including:
if the interference characteristic values are in direct proportion to the wifi interference strength, determining a wifi channel with the interference characteristic value larger than the wifi interference threshold value as a wifi interference channel to be determined; or the like, or, alternatively,
and if the interference characteristic value is inversely proportional to the wifi interference intensity, determining the wifi channel with the interference characteristic value smaller than the wifi interference threshold value as the wifi interference channel to be determined.
Optionally, the selecting the wifi interference channel from all wifi interference channels to be determined includes:
if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
Optionally, the step of removing a specific bluetooth channel from part or all of the wifi interference channels to obtain an alternative bluetooth channel set includes:
removing the Bluetooth channels corresponding to adjacent frequency points from the central frequency point of one wifi interference channel to two sides, and counting the number of the Bluetooth channels which are not removed in all the wifi channels; and when the number of the Bluetooth channels which are not rejected in all the wifi channels reaches a second preset threshold value, or all the wifi interference channels reject the specified number of the Bluetooth channels, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi channels into the alternative Bluetooth channel set.
Optionally, the bluetooth channels corresponding to adjacent frequency points are rejected to both sides from the central frequency point of a wifi interference channel, including:
if the number of the Bluetooth channels which are not removed in the wifi interference channel reaches a third preset threshold value, stopping removing the Bluetooth channels from the wifi interference channel; and the third preset threshold is a non-zero natural number.
In a second aspect, an embodiment of the present invention provides an apparatus for bluetooth channel assessment for wifi interference identification, including:
the computing unit is used for computing the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period;
the selecting unit is used for selecting the wifi interference channel with wifi interference from all the wifi channels based on the relation between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relation between the interference characteristic value of the single wifi channel and the interference characteristic value of the corresponding adjacent wifi channel;
the rejection unit is used for rejecting a specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set; wherein one sub-band within the bandwidth coverage of each wifi channel is multiplexed by one bluetooth channel.
Optionally, the computing unit is further configured to:
acquiring wifi interference historical channels with wifi interference in a last evaluation period based on the interference identification of each wifi channel in the last evaluation period;
in the current interference evaluation period, if the interference characteristic value of any Bluetooth channel with the updated interference characteristic value exceeds a Bluetooth interference threshold value in the bandwidth coverage range of one wifi interference historical channel, determining that the wifi interference of the wifi interference historical channel still exists;
if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of the wifi interference historical channel; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of the wifi interference historical channel.
Optionally, the computing unit is specifically configured to:
and carrying out sum operation on the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, or carrying out sum operation after weighting the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, so as to obtain the interference characteristic values of all the wifi channels in all the wifi channels.
Optionally, the selecting unit is further configured to:
and sequencing the interference characteristic values of all the wifi channels, and selecting the wifi interference channels with wifi interference from all the wifi channels in sequence.
Optionally, the selecting unit is specifically configured to:
according to the wifi interference threshold value, determining a wifi interference channel to be determined from all wifi channels;
and based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
Optionally, the selecting unit is further configured to:
if the interference characteristic values are in direct proportion to the wifi interference strength, determining a wifi channel with the interference characteristic value larger than the wifi interference threshold value as a wifi interference channel to be determined; or the like, or, alternatively,
and if the interference characteristic value is inversely proportional to the wifi interference intensity, determining the wifi channel with the interference characteristic value smaller than the wifi interference threshold value as the wifi interference channel to be determined.
Optionally, the selecting unit is further configured to:
if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
Optionally, the removing unit is specifically configured to:
removing the Bluetooth channels corresponding to adjacent frequency points from the central frequency point of one wifi interference channel to two sides, and counting the number of the Bluetooth channels which are not removed in all the wifi channels; and when the number of the Bluetooth channels which are not rejected in all the wifi channels reaches a second preset threshold value, or all the wifi interference channels reject the specified number of the Bluetooth channels, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi channels into the alternative Bluetooth channel set.
Optionally, the removing unit is further configured to:
if the number of the Bluetooth channels which are not removed in the wifi interference channel reaches a third preset threshold value, stopping removing the Bluetooth channels from the wifi interference channel; wherein the third preset threshold is a natural number. In a third aspect, an embodiment of the present invention further provides an apparatus for bluetooth channel estimation for identifying wifi interference, including:
at least one processor, and
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, and the at least one processor performs the method according to the first aspect by executing the instructions stored by the memory.
In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, including:
the computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the method of the first aspect as described above.
Through the technical solutions in one or more of the above embodiments of the present invention, the embodiments of the present invention have at least the following technical effects:
in the embodiment provided by the invention, the interference characteristic value of each wifi channel in all wifi channels is calculated in the current interference evaluation period; selecting wifi interference channels with wifi interference from all wifi channels according to the relationship between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of a single wifi channel and the interference characteristic value of a corresponding adjacent wifi channel; and then, removing a specific Bluetooth channel from part or all of wifi interference channels to obtain an alternative Bluetooth channel set. Therefore, the situation that each Bluetooth channel is interfered by wifi can be evaluated quickly and comprehensively in the current interference evaluation period, the specific Bluetooth channel interfered by wifi is removed, and the rest Bluetooth channels are used as alternative Bluetooth channels for the Bluetooth equipment to select.
Drawings
Fig. 1 is a flowchart of a bluetooth channel estimation method for recognizing wifi interference according to an embodiment of the present invention;
fig. 2 is a schematic diagram of removing a bluetooth channel from a wifi interference channel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a bluetooth channel assessment apparatus for identifying wifi interference according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method, a device and a storage medium for evaluating a Bluetooth channel for identifying wifi interference, which aim to solve the technical problem that the Bluetooth channel interfered by wifi cannot be evaluated quickly and comprehensively in the prior art. In order to solve the technical problems, the general idea of the embodiment of the present application is as follows:
a method for Bluetooth channel assessment for identifying wifi interference is provided, which comprises the following steps: calculating the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period; selecting wifi interference channels with wifi interference from all wifi channels based on the relationship between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of a single wifi channel and the interference characteristic value of a corresponding adjacent wifi channel; and removing the specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set. In the scheme, the interference characteristic value of each wifi channel in all wifi channels is calculated in the current interference evaluation period; selecting wifi interference channels with wifi interference from all wifi channels according to the relationship between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of a single wifi channel and the interference characteristic value of a corresponding adjacent wifi channel; and then, removing a specific Bluetooth channel from part or all of wifi interference channels to obtain an alternative Bluetooth channel set. Therefore, in the current interference evaluation period, the situation that each Bluetooth channel is interfered by wifi can be evaluated quickly and comprehensively, the Bluetooth channels interfered by wifi or the Bluetooth channels with strong interference by wifi are removed, and the rest Bluetooth channels are used as alternative Bluetooth channels for the Bluetooth equipment to select.
In order to better understand the technical solutions of the present invention, the following detailed descriptions of the technical solutions of the present invention are provided with the accompanying drawings and the specific embodiments, and it should be understood that the specific features in the embodiments and the examples of the present invention are the detailed descriptions of the technical solutions of the present invention, and are not limitations of the technical solutions of the present invention, and the technical features in the embodiments and the examples of the present invention may be combined with each other without conflict. It should be noted that, in the existing bluetooth technology and wifi technology, one sub-band within the bandwidth coverage of each wifi channel is multiplexed by one bluetooth channel.
Referring to fig. 1, an embodiment of the invention provides a method for bluetooth channel estimation to identify wifi interference, and the processing procedure of the method is as follows.
Step 101: and in the current interference evaluation period, calculating the interference characteristic value of each wifi channel in all wifi channels.
Before calculating the interference characteristic values of all wifi channels, channel recovery needs to be performed on the wifi channels, specifically: firstly, acquiring a wifi interference historical channel with wifi interference in a last evaluation period based on an interference identifier of each wifi channel in the last evaluation period; in the current interference evaluation period, if the interference characteristic value of any Bluetooth channel with the updated interference characteristic value exceeds a Bluetooth interference threshold value in the bandwidth coverage range of a wifi interference historical channel, determining that wifi interference of the wifi interference historical channel still exists; if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of one wifi interference historical channel, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of one wifi interference historical channel; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of one wifi interference historical channel.
Before evaluating the Bluetooth channel interfered by the wifi in the current interference evaluation period, channel recovery is carried out on the existing wifi interference historical channel not interfered by the wifi or the wifi interference historical channel which is interfered by the wifi and is small, and the accuracy of evaluating the Bluetooth channel interfered by the wifi in the current evaluation period can be effectively ensured.
For example, in the last interference evaluation period, wifi interference exists in 6 wifi channels of 13 wifi channels, and before the current interference evaluation period starts, the 6 wifi channels are found out from the 13 wifi channels as 6 wifi interference history channels according to the identifier of each wifi channel (assuming that the variable a is recorded in the variable a and is identified as 1, and then wifi identifiers exist in the corresponding wifi channels). And the specific channel recovery process of performing channel recovery on the wifi interference historical channel which is not interfered by wifi or the wifi interference historical channel which is interfered by wifi less in the 6 wifi interference historical channels is (taking one wifi interference historical channel M in the 6 wifi interference historical channels as an example), in the current interference evaluation period, if the interference characteristic value of any bluetooth channel which updates the interference characteristic value exceeds the bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel M, determining that the wifi interference of the wifi interference historical channel M still exists; if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel M, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of the wifi interference historical channel M; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of the wifi interference historical channel M. The other 5 wifi interference historical channels have the same channel recovery mode as the wifi interference historical channel M, and are not described again.
It should be noted that, according to the specification of the bluetooth specification, 2402-2480 MHz frequency bands are used by the bluetooth, each bluetooth channel occupies a frequency band of 1MHz, and 79 bluetooth channels are counted, wifi also occupies this frequency band, the center frequency point of each corresponding wifi channel is 2412-2472 MHz, 13 wifi channels are counted, and each wifi channel occupies a bandwidth of 22 MHz.
In the last interference evaluation period, after the wifi channel with wifi interference is subjected to channel recovery, the interference characteristic value of each wifi channel in the current interference evaluation period can be calculated.
Calculating the interference characteristic values of all wifi channels, and acquiring the interference characteristic value of each bluetooth channel in a current interference evaluation period; the interference characteristic value of each Bluetooth channel is determined according to the data receiving condition of the corresponding Bluetooth channel in the current evaluation period; and then, performing sum operation on the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, or performing sum operation after weighting the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, so as to obtain the interference characteristic values of all the wifi channels in all the wifi channels.
For example, the interference characteristic value of each bluetooth channel may be obtained by integrating information such as whether to synchronize, whether to generate an HEC error, whether to generate a CRC error, and RSSI according to the data receiving condition on the corresponding bluetooth channel.
After the interference characteristic value of each Bluetooth channel is obtained, the interference characteristic value of each wifi channel can be calculated. Taking the calculation of the interference characteristic value (denoted as W [0]) of the wifi channel (the frequency band covered is 2402-2432 MHz) with the center frequency point of 2412 as an example, assuming that the interference characteristic values of 22 bluetooth channels in the frequency band of 2402-2432 MHz are denoted as G [0] and G [1] … G [21] in sequence, W [0] ═ G [0] + G [1] + … + G [21 ].
Of course, if the priority of each bluetooth channel is required, each bluetooth channel may be weighted, and then the interference eigenvalue of the corresponding wifi channel is calculated, so that the wifi interference eigenvalue W [0] + 60% G [1] + 80% G [2] + 100% G [3] +. + 100% G [18] + 80% G [19] + 60% G [20] + 50% G [21 ]. Wherein, 50%, 60%, 80%, 100% are weighted values corresponding to bluetooth channels.
By using the method, the interference characteristic values of other 12 wifi channels can be calculated, when the interference characteristic values of the wifi channels or the bluetooth channels are calculated, registers can be allocated for each wifi channel and each bluetooth channel for temporarily storing the respective current interference characteristic values, and when the interference characteristic values are updated, the corresponding identification bits of each wifi channel and each bluetooth channel are used for identifying whether the corresponding interference characteristic values are updated or not.
After the interference eigenvalues of the wifi channels are calculated, step 102 may be executed.
Step 102: and selecting the wifi interference channel with wifi interference from all wifi channels based on the relationship between the preset wifi interference threshold value and the interference characteristic value of the single wifi channel and/or the relationship between the interference characteristic value of the single wifi channel and the interference characteristic value of the corresponding adjacent wifi channel.
Preferably, before the wifi interference channels with wifi interference are selected from all the wifi channels, the interference characteristic values of all the wifi channels are sequenced, and the wifi interference channels with wifi interference are selected from all the wifi channels in sequence.
Through ordering the wifi channels according to the interference characteristic values of the wifi channels, the wifi interference channels with strong interference caused by the wifi can be preferentially processed, judgment on whether wifi interference exists on each wifi channel can be avoided, and the wifi interference channels can be selected more quickly.
Specifically, a wifi interference channel with wifi interference is selected from all wifi channels, and a wifi interference channel to be determined can be determined from all wifi channels according to a wifi interference threshold value; and then based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
Wherein, confirm the wifi interference channel of treating the affirmation from all wifi channels, can adopt following mode: if the interference characteristic values are in direct proportion to the wifi interference strength, determining a wifi channel with the interference characteristic value larger than a wifi interference threshold value as a wifi interference channel to be determined; or if the interference characteristic values are inversely proportional to the wifi interference strength, determining the wifi channel with the interference characteristic value smaller than the wifi interference threshold value as the wifi interference channel to be determined.
For example, there are 13 wifi channels, their interference eigenvalues are W [0] to W [12] in sequence, and assuming that the larger the interference eigenvalue is, the stronger the interference intensity of the corresponding wifi channel is (that is, the interference eigenvalue is proportional to the wifi interference intensity), and the wifi interference threshold value is L, after sorting the interference eigenvalues of these 13 wifi channels, the result is:
w [5] > W [4] > W [6] > W [3] > W [7] > W [2] > W [8] > W [1] > W [9] > W [0] > W [10] > W [11] > W [12], if W [8] > L, W [1] < L, when W [1] < L is judged, the size of the following W [0], W [9] -W [12] and L can be judged no longer, W [2] -W [8] can be directly determined to be the wifi interference channel to be determined, then based on the wifi interference channel to be determined and the interference characteristic value of the corresponding adjacent wifi channel, the wifi interference channel is selected from all the wifi interference channels to be determined, and certainly, after each judgment that the wifi interference channel is to be determined, whether the wifi interference channel is further judged.
If the interference characteristic value is assumed to be larger, the interference intensity of the corresponding wifi channel is weaker (namely the interference characteristic value is inversely proportional to the wifi interference intensity), the wifi interference threshold value is L, and after the interference characteristic values of the 13 wifi channels are sequenced, the result is:
w [5] > W [4] > W [6] > W [3] > W [7] > W [2] > W [8] > W [1] > W [9] > W [0] > W [10] > W [11] > W [12], if W [8] > L, W [1] < L, when W [1] < L is judged, the sizes of the following W [0], W [9] -W [12] and L can be not judged any more, W [0], W [9] -W [12] can be directly determined as wifi interference channels to be determined, and then based on the wifi interference channels to be determined and the interference characteristic values of the corresponding adjacent wifi channels, the wifi interference channels are selected from all the wifi interference channels to be determined.
It should be noted that the wifi interference strength is the interference strength of the wifi signal to the bluetooth signal, and in the embodiment provided by the present invention, the wifi interference strength is quantified by the interference characteristic value of the wifi channel.
Specifically, the selecting of the wifi interference channel from all wifi interference channels to be determined includes: if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
The first preset threshold is set to indicate the influence level of a certain wifi channel with interference on an adjacent wifi channel without interference. According to the calculation method of the characteristic values of different Bluetooth channels or different hardware platforms, the first preset threshold values to be used may be different, and need to be obtained according to the identification accuracy of the wifi interference channel in actual testing and debugging.
If the adjacent wifi channel of the wifi interference channel to be determined does not have the wifi interference channel, the wifi interference channel to be determined is considered to have wifi interference.
The wifi interference channel is comprehensively selected by utilizing the relation between the preset wifi interference threshold value and the interference characteristic value of the single wifi channel and the relation between the interference characteristic value of the single wifi channel and the interference characteristic value of the corresponding adjacent wifi channel, and compared with the method that the effect is selected by utilizing the single relation, the method is better.
For example, assuming that the adjacent channels of the wifi interference channel 1 to be determined corresponding to the interference characteristic value W [1] are a wifi interference channel 0 (interference characteristic value W [0]) and a wifi interference channel 2 (interference characteristic value W [2]), calculating a difference value (i.e. W [0] -W [1], or W [2] -W [1]) between the interference characteristic value W [0] or W [2] of the adjacent channel and the interference characteristic value W [1] of the wifi interference channel 1 to be determined, and if W [0] -W [1] is greater than or equal to a first preset threshold value or W [2] -W [1] is greater than or equal to a first preset threshold value, determining that the wifi interference channel 1 to be determined does not have wifi interference, i.e. the wifi interference channel 1 to be determined is not a wifi interference channel; in other situations except the above situation, it is determined that wifi interference exists in the wifi interference channel 1 to be determined, that is, the wifi interference channel 1 to be determined is a wifi interference channel. In the same way, it can be determined whether the other wifi interference channel to be determined is a wifi interference channel.
After the wifi interference channel with wifi interference is selected from all wifi channels, the bluetooth channel can be removed from the interference channel, and certainly, the bluetooth channel can also be removed from the wifi interference channel while determining the wifi interference channel, and in detail, how to remove the bluetooth channel can be referred to step 103.
Step 103: and removing the specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set.
Wherein one sub-band within the bandwidth coverage of each wifi channel is multiplexed by one bluetooth channel. Further, "rejecting particular bluetooth channels" includes rejecting some or all of the bluetooth channels deemed to be subject to wifi interference. Specific Bluetooth channels are removed from each wifi interference channel, and how to remove the Bluetooth channels can be set according to different requirements.
Specifically, the bluetooth channels corresponding to adjacent frequency points can be removed from the central frequency point of one wifi interference channel to both sides, and the number of the bluetooth channels which are not removed in all the wifi channels is counted; and when the number of the Bluetooth channels which are not rejected in all the wifi channels reaches a second preset threshold value, or all the wifi interference channels reject the specified number of the Bluetooth channels, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi channels into an alternative Bluetooth channel set.
And if not, continuously removing the specific Bluetooth channel from the wifi interference channel, namely continuously removing the Bluetooth channel from the wifi interference channel or removing the Bluetooth channel from other wifi interference channels.
The second preset threshold is set to ensure that the number of the bluetooth channels that are not rejected meets the bluetooth protocol specification, for example, is not lower than the minimum value specified by the bluetooth protocol. The "specified number" is that the specified number of bluetooth channels is rejected because part of the bluetooth channels may be reserved as required in each wifi interference channel from which the bluetooth channels are rejected.
For example, assume that a wifi channel with a central frequency point of 2412 (a frequency band covered by 2402-2432 MHz) is taken as an example of a wifi interference channel in a wifi interference channel set, a part of bluetooth channels with wifi interference are removed from the wifi interference channel, and a process of removing a part of bluetooth channels with wifi interference from other wifi interference channels is similar to this, and is not repeated.
Referring to fig. 2, the frequency points adjacent to the 2412MHz center frequency point of the wifi interference channel are 2411MHz and 2413MHz, the bluetooth channels corresponding to the adjacent frequency points (2411MHz and 2413MHz) on both sides of the 2412MHz center frequency point are removed for the first time, the number of the remaining bluetooth channels is counted, the bluetooth channels in other wifi interference channels in the wifi interference channel set are removed by the same method, and the number of the remaining bluetooth channels is counted. If the number of the Bluetooth channels which are not rejected in all the wifi channels is larger than a second preset threshold value, continuing to reject the next round, rejecting the Bluetooth channels corresponding to the adjacent frequency points (2410MHz and 2414MHz) on two sides of the central frequency point 2412MHz, rejecting the Bluetooth channels in other wifi interference channels in the wifi interference channel set by adopting the same method, counting the number of the residual Bluetooth channels, if the number of the Bluetooth channels which are not rejected in all the wifi channels reaches the second preset threshold value or all the wifi interference channels reject the Bluetooth channels with the specified number, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi interference channels into an alternative Bluetooth channel set for the Bluetooth equipment to select.
It should be understood that in the above embodiment, the number of remaining bluetooth channels may be counted, for example, every time a bluetooth channel is removed, or other ways may be used.
Further, when the Bluetooth channels corresponding to adjacent frequency points are removed from the center frequency point of one wifi interference channel to the two sides, if the number of the Bluetooth channels which are not removed in one wifi interference channel reaches a third preset threshold value, the Bluetooth channels are stopped being removed from the wifi interference channel; wherein the third preset threshold is a non-zero natural number.
It should be noted that, in this embodiment, the third preset threshold is set to be a situation where a part of the bluetooth channels may be reserved, and the purpose of reserving a part (at least one) of the bluetooth channels in the wifi interference channel is to perform a recovery operation on the bluetooth channels in the next evaluation period, which is also possible if not reserved, but the recovery manner is different.
Based on the same inventive concept, an embodiment of the present invention provides a device for bluetooth channel estimation for identifying wifi interference, where a specific implementation manner of a bluetooth channel estimation method for identifying wifi interference of the device may refer to the description of the method embodiment, and repeated details are not repeated, please refer to fig. 3, and the device includes:
the calculating unit 301 is configured to calculate an interference characteristic value of each wifi signal in all wifi channels in a current interference evaluation period;
the selecting unit 302 is configured to select a wifi interference channel with wifi interference from all wifi channels based on a relationship between a preset wifi interference threshold value and an interference characteristic value of a single wifi channel and/or a relationship between the interference characteristic value of the single wifi channel and an interference characteristic value of a corresponding adjacent wifi channel;
and the removing unit 303 is configured to remove a specific bluetooth channel from part or all of the wifi interference channels to obtain an alternative bluetooth channel set.
Optionally, the calculating unit 301 is further configured to:
acquiring wifi interference historical channels with wifi interference in a last evaluation period based on the interference identification of each wifi channel in the last evaluation period;
in the current interference evaluation period, if the interference characteristic value of any Bluetooth channel with the updated interference characteristic value exceeds a Bluetooth interference threshold value in the bandwidth coverage range of one wifi interference historical channel, determining that the wifi interference of the wifi interference historical channel still exists;
if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of the wifi interference historical channel; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of the wifi interference historical channel.
Optionally, the calculating unit 301 is specifically configured to:
and carrying out sum operation on the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, or carrying out sum operation after weighting the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, so as to obtain the interference characteristic values of all the wifi channels in all the wifi channels.
Optionally, the selecting unit 302 is further configured to:
and sequencing the interference characteristic values of all the wifi channels, and selecting the wifi interference channels with wifi interference from all the wifi channels in sequence.
Optionally, the selecting unit 302 is specifically configured to:
according to the wifi interference threshold value, determining a wifi interference channel to be determined from all wifi channels;
and based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
Optionally, the selecting unit 302 is further configured to:
if the interference characteristic values are in direct proportion to the wifi interference strength, determining a wifi channel with the interference characteristic value larger than the wifi interference threshold value as a wifi interference channel to be determined; or the like, or, alternatively,
and if the interference characteristic value is inversely proportional to the wifi interference intensity, determining the wifi channel with the interference characteristic value smaller than the wifi interference threshold value as the wifi interference channel to be determined.
Optionally, the selecting unit 302 is further configured to:
if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
Optionally, the removing unit 303 is specifically configured to:
removing the Bluetooth channels corresponding to adjacent frequency points from the central frequency point of one wifi interference channel to two sides, and counting the number of the Bluetooth channels which are not removed in all the wifi channels; and when the number of the Bluetooth channels which are not rejected in all the wifi channels reaches a second preset threshold value, or all the wifi interference channels reject the specified number of the Bluetooth channels, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi channels into the alternative Bluetooth channel set.
Optionally, the rejecting unit 303 is further configured to:
if the number of the Bluetooth channels which are not removed in the wifi interference channel reaches a third preset threshold value, stopping removing the Bluetooth channels from the wifi interference channel; and the third preset threshold is a non-zero natural number.
Based on the same inventive concept, an embodiment of the present invention provides a device for bluetooth channel assessment for wifi interference identification, including: at least one processor, and
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, and the at least one processor performs the above-described wifi interference recognizing bluetooth channel assessment method by executing the instructions stored by the memory.
Based on the same inventive concept, an embodiment of the present invention further provides a computer-readable storage medium, including:
the computer readable storage medium stores computer instructions which, when executed on a computer, cause the computer to perform the wifi interference identifying bluetooth channel assessment method as described above.
In the embodiment provided by the invention, the interference characteristic values of all wifi channels are calculated in the current interference evaluation period; selecting wifi channels with wifi interference from all wifi channels according to the magnitude relation between a preset wifi interference threshold value and the interference characteristic value of each wifi channel in all wifi channels and/or the magnitude relation between the interference characteristic value of each wifi channel and the interference characteristic value of the corresponding adjacent wifi channel, and obtaining a wifi interference channel set; then, specific Bluetooth channels interfered by wifi are removed from part or all wifi interference channels in the wifi interference channel set to obtain an alternative Bluetooth channel set; wherein one sub-band within the bandwidth coverage of each wifi channel is multiplexed by one bluetooth channel. Therefore, the situation that each Bluetooth channel is interfered by wifi can be comprehensively evaluated in the current interference evaluation period, and the Bluetooth channel which is interfered by wifi weakly or is not interfered by wifi is selected as the alternative Bluetooth channel.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A method for Bluetooth channel assessment for wifi interference identification, comprising:
calculating the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period;
selecting a wifi interference channel with wifi interference from all wifi channels based on the relationship between a wifi interference threshold value and an interference characteristic value of a single wifi channel and/or the relationship between the interference characteristic value of the single wifi channel and an interference characteristic value of a corresponding adjacent wifi channel;
and removing a specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set.
2. The method of claim 1, wherein before calculating the interference eigenvalue of each of all wifi channels in the current interference evaluation period, further comprising:
acquiring wifi interference historical channels with wifi interference in a last evaluation period based on the interference identification of each wifi channel in the last evaluation period;
in the current interference evaluation period, if the interference characteristic value of any Bluetooth channel with the updated interference characteristic value exceeds a Bluetooth interference threshold value in the bandwidth coverage range of one wifi interference historical channel, determining that the wifi interference of the wifi interference historical channel still exists;
if the interference characteristic values of the Bluetooth channels with updated interference characteristic values do not exceed the Bluetooth interference threshold value in the bandwidth coverage range of the wifi interference historical channel, reducing or resetting the interference characteristic values of all the Bluetooth channels in the bandwidth coverage range of the wifi interference historical channel; or reducing or resetting the interference characteristic value of the Bluetooth channel of which the interference characteristic value is not updated in the bandwidth coverage range of the wifi interference historical channel.
3. The method of claim 1, wherein the calculating the interference eigenvalues for each of all wifi channels comprises:
and carrying out sum operation on the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, or carrying out sum operation after weighting the interference characteristic values of all the Bluetooth channels in the bandwidth covered by each wifi channel, so as to obtain the interference characteristic values of all the wifi channels in all the wifi channels.
4. The method of claim 1, wherein before selecting the wifi interference channel with wifi interference from all wifi channels, further comprising:
and sequencing the interference characteristic values of all the wifi channels, and selecting the wifi interference channels with wifi interference from all the wifi channels in sequence.
5. The method of any one of claims 1-4, wherein selecting wifi interference channels with wifi interference from all wifi channels comprises:
according to the wifi interference threshold value, determining a wifi interference channel to be determined from all wifi channels;
and based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
6. The method of claim 5, wherein determining a wifi interference channel to be determined from the all wifi channels according to the wifi interference threshold comprises:
if the interference characteristic values are in direct proportion to the wifi interference strength, determining a wifi channel with the interference characteristic value larger than the wifi interference threshold value as a wifi interference channel to be determined; or the like, or, alternatively,
and if the interference characteristic value is inversely proportional to the wifi interference intensity, determining the wifi channel with the interference characteristic value smaller than the wifi interference threshold value as the wifi interference channel to be determined.
7. The method of claim 5, wherein the selecting the wifi interference channel from all wifi interference channels to be determined comprises:
if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
8. The method according to any of claims 1-4, wherein removing certain Bluetooth channels from some or all of the wifi interference channels to obtain a set of alternative Bluetooth channels comprises:
removing the Bluetooth channels corresponding to adjacent frequency points from the central frequency point of one wifi interference channel to two sides, and counting the number of the Bluetooth channels which are not removed in all the wifi channels; and when the number of the Bluetooth channels which are not rejected in all the wifi channels reaches a second preset threshold value, or all the wifi interference channels reject the specified number of the Bluetooth channels, stopping rejecting the Bluetooth channels, and constructing the Bluetooth channels which are not rejected in all the wifi channels into the alternative Bluetooth channel set.
9. The method of claim 8, wherein the step of removing the bluetooth channels corresponding to the adjacent frequency points from the center frequency point of one wifi interference channel to both sides comprises:
if the number of the Bluetooth channels which are not removed in the wifi interference channel reaches a third preset threshold value, stopping removing the Bluetooth channels from the wifi interference channel; and the third preset threshold is a non-zero natural number.
10. An apparatus for bluetooth channel assessment that identifies wifi interference, comprising:
the computing unit is used for computing the interference characteristic value of each wifi channel in all wifi channels in the current interference evaluation period;
the selecting unit is used for selecting the wifi interference channel with wifi interference from all the wifi channels based on the relation between a preset wifi interference threshold value and the interference characteristic value of a single wifi channel and/or the relation between the interference characteristic value of the single wifi channel and the interference characteristic value of the corresponding adjacent wifi channel;
the rejection unit is used for rejecting a specific Bluetooth channel from part or all of the wifi interference channels to obtain an alternative Bluetooth channel set; wherein one sub-band within the bandwidth coverage of the single wifi channel is multiplexed by one bluetooth channel.
11. The apparatus of claim 10, wherein the choosing unit is to:
according to the wifi interference threshold value, determining a wifi interference channel to be determined from all wifi channels;
and based on the wifi interference channel to be determined and the interference characteristic value corresponding to the adjacent wifi channel, selecting the wifi interference channel from all the wifi interference channels to be determined.
12. The apparatus of claim 11, wherein the choosing unit is further configured to:
if at least one of the adjacent wifi channels of the wifi interference channel to be determined is the wifi interference channel, and the difference value between the wifi interference intensity of one of the adjacent wifi channels of the wifi interference channel to be determined and the wifi interference intensity of the wifi interference channel to be determined is larger than a first preset threshold value, determining that the wifi interference channel to be determined does not have wifi interference, otherwise, determining that the wifi interference channel to be determined has wifi interference.
13. An apparatus for bluetooth channel assessment that identifies wifi interference, comprising:
at least one processor, and
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor performing the method of any one of claims 1-9 by executing the instructions stored by the memory.
14. A computer-readable storage medium characterized by:
the computer readable storage medium stores computer instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-9.
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