CN110858981A - Method and device for reducing mutual interference of WIFI and BLE coexistence - Google Patents
Method and device for reducing mutual interference of WIFI and BLE coexistence Download PDFInfo
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- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
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- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
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Abstract
The invention provides a method and a device for reducing mutual interference of WIFI coexistence and BLE coexistence, wherein the method for reducing mutual interference of WIFI coexistence and BLE coexistence comprises the following steps: the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance, so that the WIFI antenna and the BLE antenna are placed along the edge of the PCB in a separated mode, and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other; when the WIFI and the BLE work simultaneously and the BLE communication state is detected to be deteriorated for the first time, the transmitting power of the WIFI is reduced to a preset value on the basis of ensuring normal communication of the WIFI; and carrying out secondary detection on the BLE communication state, and if the BLE communication state is still deteriorated after secondary detection, starting the WIFI and BLE time-sharing working strategy. According to the method for reducing mutual interference of WIFI coexistence and BLE, measures are respectively taken on the basis of a hardware layer and a software layer, so that the communication distance, the communication delay and the communication performance of BLE are not deteriorated due to the interference of WIFI, the mutual interference of WIFI and BLE is effectively reduced, and the WIFI and BLE can coexist in the same frequency band and still work normally.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for reducing coexistence mutual interference of WIFI and BLE.
Background
Internet controller has WIFI function and Bluetooth function (BLE), and both operating frequency channels all are in on the 2.4GHz frequency channel, therefore, if both during operation simultaneously, WIFI can seriously disturb BLE and receive, leads to BLE reception ability to descend, and BLE is light then communication distance reduces, and communication delay increases, then can't normally work completely heavily.
At present, the solution to the problem that mutual interference exists in WIFI function and bluetooth function simultaneous working is: based on the dual-frequency router, specifically 2.4GH and 5GHz, the WIFI works on the 5GHz frequency band, and the BLE works on the 2.4 GH. But this approach requires the purchase of a dual-frequency router, increasing cost.
Aiming at the problem that mutual interference exists when a WIFI function and a Bluetooth function work simultaneously in the prior art, a solution is always searched by a person skilled in the art.
Disclosure of Invention
The invention aims to provide a method and a device for reducing coexistence mutual interference of WIFI and BLE, and the method and the device are used for solving the problem of mutual interference existing when a WIFI function and a Bluetooth function work simultaneously.
In order to solve the above technical problem, the present invention provides a method for reducing mutual interference between WIFI coexistence and BLE coexistence, where the method for reducing mutual interference between WIFI coexistence and BLE coexistence includes the following steps:
the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance, so that the WIFI antenna and the BLE antenna are placed along the edge of the PCB in a separated mode, and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other;
when the WIFI and the BLE work simultaneously and the BLE communication state is detected to be deteriorated for the first time, the transmitting power of the WIFI is reduced to a preset value on the basis of ensuring normal communication of the WIFI;
and carrying out secondary detection on the BLE communication state, and if the BLE communication state is still deteriorated after secondary detection, starting the WIFI and BLE time-sharing working strategy.
Optionally, in the method for reducing mutual interference between WIFI and BLE coexistence, the WIFI and BLE time-sharing operating strategy includes the following steps:
acquiring the working states of BLE and WIFI;
judging the priority of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, taking the part in the preparation working state as the part with higher priority; if both are in working state, taking BLE as the higher priority side;
the party with high priority is operated firstly, and the party with low priority starts to operate after the operation of the party with high priority is finished.
Optionally, in the method for reducing coexistence mutual interference of WIFI and BLE, the operating states of BLE and WIFI are respectively obtained based on a GPIO line between the WIFI module and the BLE module.
Optionally, in the method for reducing WIFI and BLE coexistence mutual interference, during the process of operating the party with the higher priority, the party with the lower priority suspends transceiving data, and buffers all received or to-be-transmitted data in the buffer.
Optionally, in the method for reducing WIFI and BLE coexistence mutual interference, the basis for determining whether the BLE communication state is degraded is as follows: whether the communication delay increases or the RSSI deteriorates.
The invention also provides a device for reducing mutual interference of WIFI coexistence and BLE coexistence, which comprises:
the pre-adjusting module is used for pre-adjusting the distribution positions of the WIFI antenna and the BLE antenna on the PCB so that the WIFI antenna and the BLE antenna are separately placed along the edge of the PCB and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other;
the detection module is used for detecting a BLE communication state;
the judging module is used for judging whether the BLE communication state detected by the detecting module is deteriorated;
the adjusting module is used for reducing the transmitting power of the WIFI to a preset value on the basis of ensuring normal communication of the WIFI when the BLE communication state is detected to be deteriorated for the first time;
and the time-sharing working strategy module is used for developing a time-sharing working strategy between the WIFI and the BLE when the BLE communication state is detected to be still deteriorated for the second time after the regulation of the regulation module.
Optionally, in the WIFI and BLE coexistence mutual interference reduction device, the time-sharing operation policy module includes:
the working state acquisition module is used for acquiring the working states of BLE and WIFI;
the priority level judging module is used for judging the priority levels of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, the party in the preparation working state is taken as the party with the higher priority level; if both are in working state, taking BLE as the higher priority side;
and the operation module is used for operating the party with the high priority first, and the party with the low priority starts to operate after the operation of the party with the high priority is finished.
Optionally, in the device for reducing the mutual interference between the WIFI module and the BLE module, the WIFI module and the BLE module communicate with each other through two GPIO lines to acquire the working state of the other party.
Optionally, in the WIFI and BLE coexistence mutual interference reduction device, the detection module is an MCU.
In the method and the device for reducing mutual interference between WIFI coexistence and BLE coexistence provided by the invention, the method for reducing mutual interference between WIFI coexistence and BLE coexistence comprises the following steps: the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance, so that the WIFI antenna and the BLE antenna are placed along the edge of the PCB in a separated mode, and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other; when the WIFI and the BLE work simultaneously and the BLE communication state is detected to be deteriorated for the first time, the transmitting power of the WIFI is reduced to a preset value on the basis of ensuring normal communication of the WIFI; and carrying out secondary detection on the BLE communication state, and if the BLE communication state is still deteriorated after secondary detection, starting the WIFI and BLE time-sharing working strategy. According to the method for reducing mutual interference of WIFI coexistence and BLE, measures are respectively taken on the basis of a hardware layer and a software layer, so that the communication distance, the communication delay and the communication performance of BLE are not deteriorated due to the interference of WIFI, the mutual interference of WIFI and BLE is effectively reduced, and the WIFI and BLE can coexist in the same frequency band and still work normally.
Drawings
Figure 1 is a flow chart of a method for reducing WIFI and BLE coexistence interference in an embodiment of the present invention;
fig. 2 is a schematic diagram of a PCB board after pre-adjusting distribution positions of the WIFI antenna and the BLE antenna on the PCB board according to an embodiment of the present invention;
figure 3 is a flow chart of the WIFI and BLE time sharing operating strategy in an embodiment of the present invention;
figure 4 is a schematic diagram of the WIFI and BLE time sharing operating strategy in an embodiment of the present invention.
Detailed Description
The method and the device for reducing WIFI and BLE coexistence mutual interference according to the present invention are further described in detail with reference to the accompanying drawings and the specific embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
Certain terms are used throughout the description and claims to refer to particular system components. As one skilled in the art will appreciate, different companies may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the description and claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to …".
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
Furthermore, each of the embodiments described below has one or more technical features, and thus, the use of the technical features of any one embodiment does not necessarily mean that all of the technical features of any one embodiment are implemented at the same time or that only some or all of the technical features of different embodiments are implemented separately. In other words, those skilled in the art can selectively implement some or all of the features of any embodiment or combinations of some or all of the features of multiple embodiments according to the disclosure of the present invention and according to design specifications or implementation requirements, thereby increasing the flexibility in implementing the invention.
The present invention will be described in more detail with reference to the accompanying drawings, in order to make the objects and features of the present invention more comprehensible, embodiments thereof will be described in detail below, but the present invention may be implemented in various forms and should not be construed as being limited to the embodiments described.
Example one
Please refer to fig. 1, which is a flowchart illustrating a method for reducing mutual interference between WIFI coexistence and BLE coexistence according to the present invention. As shown in fig. 1, the method for reducing mutual interference between WIFI and BLE coexistence includes the following steps:
firstly, executing step S1, and pre-adjusting the distribution positions of the WIFI antenna and the BLE antenna on the PCB, so that the WIFI antenna and the BLE antenna are separately placed along the edge of the PCB, and the directions of the WIFI antenna and the BLE antenna are mutually perpendicular;
for better understanding of step S1, please refer to fig. 2, which is a schematic diagram of the PCB after the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance.
In this embodiment, in the pre-adjustment process, not only will make WIFI antenna and BLE antenna trend mutually perpendicular, still need to make the two physical separation keep as far as enough big as possible to guarantee that the two interval is enough big, avoid the interference between the two tentatively. Taking the length of the PCB board as 130mm and the width as 80mm as an example; after the pre-adjustment, the distribution position conditions of the WIFI antenna and the BLE antenna on the PCB are as follows: the distance from the right edge of the WIFI antenna to the right edge of the PCB is 54mm, and the distance from the center of the WIFI antenna to the right edge of the PCB is 63 mm; the distance between the upper edge of BLE antenna and the upper edge of PCB board is 18.6mm, and the distance between the center of BLE antenna and the upper edge of PCB board is 40mm, and is preferred, and the interval is 67mm between WIFI antenna and the BLE antenna.
Then, step S2 is executed, when WIFI and BLE work simultaneously, and the BLE communication state is detected to be deteriorated for the first time, the transmission power of WIFI is reduced to a predetermined value on the basis of ensuring normal communication of WIFI; wherein the basis for determining whether the BLE communication state is degraded is: whether the communication delay increases or the RSSI deteriorates.
Next, step S3 is executed, a second time of BLE communication state detection is performed, and if the BLE communication state is still deteriorated by the second time of BLE communication state detection, the WIFI and BLE time-sharing operation policy is started.
Specifically, please refer to fig. 3 and 4, fig. 3 is a flowchart of the WIFI and BLE time-sharing operating strategy; figure 4 is a schematic diagram of WIFI and BLE time sharing operating strategies. As shown in fig. 3 and 4, the WIFI and BLE time sharing operation strategy includes the following steps:
s30: acquiring the working states of BLE and WIFI;
s31: judging the priority of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, taking the part in the preparation working state as the part with higher priority; if both are in working state, taking BLE as the higher priority side;
furthermore, in the process of operating the party with the higher priority, the party with the lower priority suspends the data receiving and sending, and buffers all the received or to-be-sent data in the buffer.
S32: the party with high priority is operated firstly, and the party with low priority starts to operate after the operation of the party with high priority is finished.
For better understanding of the WIFI and BLE time sharing operation strategies, the following is detailed with an example:
as shown in fig. 4, communication is established between the WIFI module and the BLE module through two GPIO lines, specifically including a GPIO-WIFI-TO-BLE line for acquiring a working state of WIFI and a GPIO-BLE-TO-WIFI line for acquiring a working state of BLE; MCU is used for controlling WIFI's transmitting power, controlling whether communication and the communication state of detection BLE of BLE are whether BLE and WIFI communicate. If the current BLE is acquired to be in a preparation working state (namely, a working state is required), the BLE module informs the working state of the WIFI module based on the GPIO line, the WIFI module is required to pause transceiving, all data are cached in a buffer, when the BLE module does not work, the WIFI module is informed of no work of the BLE module based on the GPIO line, the WIFI can cancel the pause, and data transceiving is started. Otherwise, it is not described herein in detail.
Example two
The present embodiment provides a device for reducing mutual interference between WIFI and BLE coexistence, including: the device comprises a pre-adjusting module, a detecting module, a judging module, an adjusting module and a time-sharing working strategy module, wherein the pre-adjusting module is used for pre-adjusting the distribution positions of the WIFI antenna and the BLE antenna on the PCB so that the WIFI antenna and the BLE antenna are separately placed along the edge of the PCB and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other; the detection module is used for detecting a BLE communication state; the judging module is used for judging whether the BLE communication state detected by the detecting module is deteriorated; the adjusting module is used for reducing the transmitting power of the WIFI to a preset value on the basis of ensuring normal communication of the WIFI when the BLE communication state is detected to be deteriorated for the first time; and the time-sharing working strategy module is used for developing a time-sharing working strategy between the WIFI and the BLE when the BLE communication state is detected to be still deteriorated for the second time after the adjustment of the adjusting module. Preferably, the detection module is an MCU (micro control unit).
Further, the time-sharing working strategy module comprises: the device comprises a working state acquisition module, a priority level judgment module and an operation module, wherein the working state acquisition module is used for acquiring the working states of BLE and WIFI; the priority level judging module is used for judging the priority levels of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, the party in the preparation working state is taken as the party with the higher priority level; if both are in working state, taking BLE as the higher priority side; the operation module is used for operating the party with the high priority first, and the party with the low priority starts to operate after the operation of the party with the high priority is finished.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the method disclosed by the embodiment, the description is relatively simple because the method corresponds to the structure disclosed by the embodiment, and the relevant points can be referred to the structural part for description.
In summary, in the method and the apparatus for reducing mutual interference between WIFI coexistence and BLE coexistence provided by the present invention, the method for reducing mutual interference between WIFI coexistence and BLE coexistence includes: the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance, so that the WIFI antenna and the BLE antenna are placed along the edge of the PCB in a separated mode, and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other; when the WIFI and the BLE work simultaneously and the BLE communication state is detected to be deteriorated for the first time, the transmitting power of the WIFI is reduced to a preset value on the basis of ensuring normal communication of the WIFI; and carrying out secondary detection on the BLE communication state, and if the BLE communication state is still deteriorated after secondary detection, starting the WIFI and BLE time-sharing working strategy. According to the method for reducing the coexistence mutual interference of the WIFI and the BLE, measures are respectively taken on the basis of a hardware layer and a software layer, so that the communication distance, the communication delay and the communication performance of the BLE are not deteriorated due to the interference of the WIFI, the mutual interference of the WIFI and the BLE is effectively reduced, and the WIFI and the BLE can coexist in the same frequency band and still work normally.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any variations and modifications made by those skilled in the art based on the above disclosure are within the scope of the appended claims.
Claims (9)
1. A method for reducing mutual interference of WIFI and BLE coexistence is characterized by comprising the following steps:
the distribution positions of the WIFI antenna and the BLE antenna on the PCB are adjusted in advance, so that the WIFI antenna and the BLE antenna are placed along the edge of the PCB in a separated mode, and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other;
when the WIFI and the BLE work simultaneously and the BLE communication state is detected to be deteriorated for the first time, the transmitting power of the WIFI is reduced to a preset value on the basis of ensuring normal communication of the WIFI;
and carrying out secondary detection on the BLE communication state, and if the BLE communication state is still deteriorated after secondary detection, starting the WIFI and BLE time-sharing working strategy.
2. The method of reducing WIFI and BLE coexistence interference according to claim 1, wherein said WIFI and BLE time sharing operating strategy comprises the steps of:
acquiring the working states of BLE and WIFI;
judging the priority of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, taking the part in the preparation working state as the part with higher priority; if both are in working state, taking BLE as the higher priority side;
the party with high priority is operated firstly, and the party with low priority starts to operate after the operation of the party with high priority is finished.
3. The method of claim 2, wherein the operating states of BLE and WIFI are known based on GPIO lines between the WIFI module and the BLE module.
4. The method of claim 2, wherein during operation of the party with the higher priority, the party with the lower priority suspends transceiving data, and buffers all received or to-be-transmitted data in the buffer.
5. The method of reducing WIFI and BLE coexistence mutual interference according to claim 1, wherein determining whether BLE communication status is degrading is based on: whether the communication delay increases or the RSSI deteriorates.
6. A device for reducing mutual interference between WIFI and BLE coexistence, comprising:
the pre-adjusting module is used for pre-adjusting the distribution positions of the WIFI antenna and the BLE antenna on the PCB so that the WIFI antenna and the BLE antenna are separately placed along the edge of the PCB and the directions of the WIFI antenna and the BLE antenna are perpendicular to each other;
the detection module is used for detecting a BLE communication state;
the judging module is used for judging whether the BLE communication state detected by the detecting module is deteriorated;
the adjusting module is used for reducing the transmitting power of the WIFI to a preset value on the basis of ensuring normal communication of the WIFI when the BLE communication state is detected to be deteriorated for the first time;
and the time-sharing working strategy module is used for developing a time-sharing working strategy between the WIFI and the BLE when the BLE communication state is detected to be still deteriorated for the second time after the regulation of the regulation module.
7. The apparatus of claim 6, wherein the timesharing operating strategy module comprises:
the working state acquisition module is used for acquiring the working states of BLE and WIFI;
the priority level judging module is used for judging the priority levels of the working states of the WIFI and the BLE, and if one of the WIFI and the BLE is in a preparation working state, the party in the preparation working state is taken as the party with the higher priority level; if both are in working state, taking BLE as the higher priority side;
and the operation module is used for operating the party with the high priority first, and the party with the low priority starts to operate after the operation of the party with the high priority is finished.
8. The device of claim 6, wherein the WIFI module and the BLE module communicate with each other through two GPIO lines to obtain the operating status of each other.
9. The apparatus of claim 6, wherein the detection module is an MCU.
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