CN112087760A - Channel determination method and device and storage medium - Google Patents
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The invention provides a channel determination method, a channel determination device and a storage medium. The channel determining method comprises the steps of obtaining a channel of a first signal, determining an isolation bandwidth of the first signal, and determining a channel of a second signal according to the channel of the first signal and the isolation bandwidth so as to reduce channel mutual interference. The first signal and the second signal are signals with interference in the same frequency band. The method is used for solving the problem that the mutual interference of channels in the same frequency band wireless technology is not prevented in the prior art.
Description
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, and a computer-readable storage medium for channel determination.
Background
The short-distance wireless transmission technology 2.4GHz is a wireless frequency band which is publicly and commonly used all over the world, and has a phenomenon of coexistence of a plurality of technologies, and the most important wireless technology comprises the following steps: wireless local area networks (Wi-Fi), ZigBee (ZigBee), and bluetooth (bluetooth).
ZigBee and Wi-Fi are interfered with each other in 2.4G, which is a common problem in the industry, but some terminal products need to integrate ZigBee and Wi-Fi into one device at present, and both ZigBee and Wi-Fi need to work simultaneously, which can cause very serious coexistence interference of Wi-Fi and ZigBee.
At present, the working frequency bands of 802.11b and 802.11g are distributed in the frequency band of 2.4GHz, 11 channels are shared by 2.412 to 2.462GHz in North America, 13 channels are shared by 2.412 to 2.472GHz in Europe and China, and 14 channels are shared by 2.412 to 2.484GHz in Japan. Therefore, the manufacturer selects the default configuration of the channels 1, 6 and 11 to achieve the maximum benefit of using the 2.4G frequency resource. With the rise of the internet of things technology, ZigBee is widely applied to the internet of things technology as a short-distance connection technology with low complexity and low power consumption. ZigBee and Wi-Fi coexist, and work at the same time more and more. But since both are mainly in the ISM band of 2.4GHZ, they inevitably generate mutual interference. The market has higher and higher rate for Wi-Fi, and when a Wi-Fi hotspot establishes a channel and generates traffic for use, other 2.4GHz devices on the channel can hardly occupy resources again, such as in a limited space, if a ZigBee device and Wi-Fi are in the vicinity of the channel. When Wi-Fi big data is transmitted, ZigBee transmission can be influenced to a certain extent. Particularly, when the product is provided with a Wi-Fi module and a ZigBee module, and when the Wi-Fi module runs at a high speed, the ZigBee cannot effectively finish data transmission due to the fact that a channel is occupied, so that ZigBee data delay and even loss are caused, and various hidden dangers are brought.
At present, the method for solving the problems is mainly aimed at the problem of channel optimization of a ZigBee product, the product is provided with a Wi-Fi module and a ZigBee module, the Wi-Fi module is mainly used for searching the use condition of Wi-Fi channels in a search range, and the last channel used by the ZigBee is judged according to the obtained information, so that the coexistence of the ZigBee product and the Wi-Fi outside is realized. The scheme only aims at a mode of avoiding coexistence of a product with ZigBee on an external Wi-Fi channel, and cannot solve the problem of mutual interference of product channels of Wi-Fi and ZigBee integrated in the same equipment. In addition, after the Wi-Fi channels nearby are detected at regular time, the ZigBee channels perform corresponding switching work according to information, but the ZigBee nodes cannot use the ZigBee sensors when the ZigBee channels are changed due to the fact that the ZigBee products have a sleep function.
Therefore, the related art cannot effectively solve the problem that the terminals with Wi-Fi and ZigBee interfere with each other.
Disclosure of Invention
The invention provides a method and a device for determining a channel, which are used for solving the problem that the mutual interference of channels in the same-frequency-band wireless technology is not prevented in the prior art.
In order to solve the above technical problem, in one aspect, the present invention provides a method for determining a channel, including acquiring a channel of a first signal, determining an isolation bandwidth of the first signal, and determining a channel of a second signal according to the channel of the first signal and the isolation bandwidth. Wherein the transmission rate of the first signal is less than the second signal.
Further, the step of fixing the channel of the first signal is further included after the step of acquiring the channel of the first signal and the channel of the second signal.
Further, after determining the isolation bandwidth of the first signal, the method further includes: and judging the bandwidth information of the second signal.
Further, adjusting a channel of a second signal according to the channel of the first signal and the isolation bandwidth, further comprising: and adjusting the channel of the second signal according to the isolation bandwidth and the bandwidth information of the second signal.
Further, the bandwidth information of the second signal includes at least one of: standard bandwidth, extended bandwidth.
In another aspect, the present invention further provides an apparatus for channel determination, including:
the device comprises an acquisition module, a processing module and a processing module, wherein the acquisition module is used for acquiring a channel of a first signal; a bandwidth determination module for determining an isolation bandwidth of the first signal; and the channel determining module is used for adjusting the channel of the second signal according to the channel of the first signal and the isolation bandwidth so as to reduce channel mutual interference.
Further, the acquiring module is further configured to fix the channel of the first signal after acquiring the channel of the first signal.
Further, the channel determination module further comprises: a judging unit for judging the bandwidth information of the second signal in the current state, and an adjusting unit for adjusting the channel of the second signal.
Further, the bandwidth information of the second signal that the segment determining unit can determine includes at least one of the following: standard bandwidth, extended bandwidth.
The method for determining the channel of the second signal through the channel of the first signal and the isolation bandwidth of the first signal enables the second signal to effectively avoid the first signal, reduces mutual interference among signals in the same frequency band, enhances the stability of signal transmission and improves the transmission rate of equipment.
Drawings
FIG. 1 is a flow chart of a method for preventing channel cross talk in an embodiment of the present invention;
fig. 2 is a block diagram of an apparatus for preventing channel crosstalk according to an embodiment of the present invention; c. C
FIG. 3 is a system block diagram of an apparatus in a first preferred embodiment of the present invention;
FIG. 4 is a flowchart illustrating a method for preventing interference between ZigBee and Wi-Fi channels according to a first preferred embodiment of the present invention;
fig. 5 is a schematic diagram of implementing avoidance of WiFi 20M bandwidth when ZigBee operates on 11 channels in a second preferred embodiment of the present invention;
fig. 6 is a schematic diagram of implementing avoidance of WiFi 40M bandwidth when ZigBee operates on 11 channels in a second preferred embodiment of the present invention;
Detailed Description
In order to solve the problem of preventing the mutual interference of channels in the same-frequency-band wireless technology, which is not provided in the prior art, the present invention provides a method and an apparatus for determining a channel, and the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
At present, the problem of channel interference of radio technologies in the same frequency band is often encountered. In view of the above problem, an embodiment of the present invention provides a method for determining a channel, where the flow of the method is shown in fig. 1, and the method includes steps S101 to S103.
Step S101, acquiring a channel of a first signal;
step S102, determining the isolation bandwidth of the first signal;
step S103, determining a channel of a second signal according to the channel of the first signal and the isolation bandwidth.
In an alternative embodiment, the channel of the first signal is fixed after the channel of the first signal is acquired. c, fixing the first signal is used for preventing the equipment connected with the first signal from being disconnected after the channel of the first channel is switched. This scheme can be implemented if not fixed to the channel, and is only ineffective in terms of signal transmission rate.
Setting the isolation bandwidth of the first signal and the second signal further comprises determining the isolation bandwidth of the first signal and the second signal according to the bandwidth information of the second signal.
Adjusting the channel of the second signal according to the isolation bandwidth further comprises judging the bandwidth information of the second signal and determining the channel of the second signal according to the bandwidth of the second signal and the isolation bandwidth of the first signal and the second signal. Wherein the bandwidth information of the second signal comprises at least one of: standard bandwidth, extended bandwidth.
The first signal and the second signal are very wide in variety, the common-frequency-band signals which are most easily seen at present are ZigBee and Wi-Fi, and of course, other signals with similar common-frequency-bands exist. E.g., ZieBee and bluetooth, bluetooth and Wi-Fi, etc.
The Wi-Fi transmitting power is usually between 12 and 18dBm, but can also be as high as 30dBm, and is higher than the wireless output power of ZigBee, and the Wi-Fi operating in the 2.4GHz ISM frequency band can be an interference source of ZigBee; compared with Wi-Fi, ZigBee has lower output power, duty ratio and signal frequency bandwidth, so that the operation of a Wi-Fi system is less influenced. Interference of ZigBee to Wi-Fi can be ignored, and interference of Wi-Fi to ZigBee is large, so that interference to a ZigBee working channel is relieved by adjusting a Wi-Fi working channel. The following describes a method for mutual interference between ZigBee and Wi-Fi channels, where the first signal is ZigBee and the second signal is Wi-Fi, the method including:
and acquiring a channel where the ZigBee is positioned, fixing the channel, then acquiring a Wi-Fi channel, and determining whether interference exists in the ZigBee channel and the Wi-Fi channel. Under the condition that interference exists between a ZigBee channel and a Wi-Fi channel, in order to not seriously affect the channel selection function of the Wi-Fi and ensure that the ZigBee channel can realize maximum isolation from a Wi-Fi working channel, the coverage ranges of ZigBee and Wi-Fi signals are determined, and the isolation bandwidth is determined according to the coverage ranges. And further judging the Wi-Fi bandwidth, and adjusting the Wi-Fi working channel according to the isolation bandwidth and the Wi-Fi bandwidth.
When the working channel of the Wi-Fi is adjusted, different adjustments can be performed according to the obtained Wi-Fi bandwidth information. Wherein the Wi-Fi bandwidth information comprises at least one of: standard bandwidth, extended bandwidth. Wherein the standard bandwidth is 20MHz and the extended bandwidth is 40MHz or even higher 80 MHz.
The embodiment of the present invention further provides a device for preventing mutual interference of channels, where the device, as shown in fig. 2, includes an obtaining module 10, configured to obtain a channel of a first signal; a bandwidth determining module 20, coupled to the obtaining module 10, for determining an isolation bandwidth of the first signal; a channel determining module 30, coupled to the bandwidth determining module 20, for determining a channel of the second signal according to the channel of the first signal and the isolation bandwidth.
The obtaining module 10 is further configured to fix a channel of a first signal after obtaining the channel of the first signal.
The channel determination module 30 further includes: a segment determining unit 301, and an adjusting unit 302 coupled to the determining unit 301. The segment determining unit 301 determines a plurality of types of bandwidth information, and the adjusting unit 302 may adjust the channel of the second signal according to the difference of the bandwidth information determined by the segment determining unit 301. The bandwidth information of the second signal that can be determined by the segment determining unit 301 at least includes one of the following: standard bandwidth, extended bandwidth. Wherein the standard bandwidth is 20MHz and the extended bandwidth is 40MHz or even higher 80 MHz.
When the determining unit 301 determines the bandwidth information of the current second signal, the adjusting unit 302 is configured to reallocate the working channel of the second signal according to the bandwidth information of the second signal and the isolation bandwidth determined by the determining module 20.
The first signal in the preferred embodiment is a ZigBee signal and the second signal is a Wi-Fi signal. The method for determining the channel is provided to solve the problem of channel mutual interference of the ZigBee signal and the Wi-Fi signal in the same frequency band.
Fig. 3 shows a system diagram of the preferred embodiment, wherein 301Wi-Fi represents a device with a Wi-Fi device, 302ZigBee represents a device with a ZigBee coordinator, the device comprises both Wi-Fi and ZigBee coordinator, 303ZigBee represents a ZigBee sensor, such as a ZigBee alarm, ZigBee water-proof, ZigBee lamp, etc., with a ZigBee protocol, and the 302ZigBee coordinator in the device forms a ZigBee network.
Under the system, Wi-Fi and ZigBee operate simultaneously, after a Wi-Fi channel is occupied, ZigBee cannot effectively transmit data, partial sensors are in a dormant state after ZigBee networking is carried out, if ZigBee working channels are adjusted, the partial sensors are disconnected, and therefore coexistence of Wi-Fi and ZigBee cannot be achieved by switching ZigBee working channels. Interference to the ZigBee channel can only be mitigated by adjusting the Wi-Fi working channel.
Fig. 4 shows a workflow diagram of a method of preventing ZigBee and Wi-Fi channel mutual interference, the workflow comprising the steps of:
step S401, starting networking by the equipment and transmitting data;
step S402, acquiring working channels of Wi-Fi and ZigBee, recording and fixing channels used by ZigBee;
step S403, determining the isolation bandwidth of Wi-Fi and ZigBee signals;
the larger the Wi-Fi and ZigBee working channel interval is, the smaller the interference is, and the isolation frequency, such as 15MHZ isolation, is determined.
Step S404, judging Wi-Fi bandwidth information;
the Wi-Fi bandwidth information is divided into a standard bandwidth and an extended bandwidth, wherein the standard bandwidth is 20MHz, and the extended bandwidth is 40MHz or even higher 80 MHz.
Step S405, calculating a channel available for Wi-Fi according to the ZigBee working channel, the isolation bandwidth and the Wi-Fi bandwidth information; and adjusting the Wi-Fi working channel according to the calculated channel.
And step S406, after the adjustment is finished, judging whether the equipment has a mutual interference state. If the mutual interference state does not exist, executing step S407; and if the interference still exists, returning to the step S403, and re-determining the isolated bandwidths of the Wi-Fi and the ZigBee signals. The above process is repeatedly executed until the Wi-Fi signal does not interfere the ZigBee signal.
In step S407, the flow ends.
Preferred embodiment two
In the preferred embodiment, after the ZigBee is started, the working channel of the ZigBee is fixed to an 11 channel, the central frequency band of the ZigBee is 2405MHz, and the coverage of the central frequency band is 2402.5MHz to 2407.5 MHz.
FIG. 5 is a schematic diagram showing that Wi-Fi is 20M bandwidth when ZigBee works on 11 channels
The determining module determines that the isolation bandwidth is 15M and the Wi-Fi channel coverage after isolation is X;
2402.5MHz +15MHz X2407.5 MHz +15MHz 2417.5MHz X2422.5 MHz
When the judgment unit judges that the Wi-Fi bandwidth information is the standard bandwidth 20MHz, the 20M bandwidth nearest to 2425MHz is a channel 5, the channel 5 to 13 which can be selected by Wi-Fi is calculated, the adjustment module adjusts the Wi-Fi signal to any channel between the channel 5 and the channel 13, and the interference of the Wi-Fi on the ZigBee is greatly reduced after adjustment as shown in figure 5.
FIG. 6 is a schematic diagram showing that Wi-Fi is 40M bandwidth when ZigBee works on 11 channels
The determining module determines that the isolation bandwidth is 15M and the Wi-Fi channel coverage after isolation is X;
2402.5MHz +15MHz X2407.5 MHz +15MHz 2417.5MHz X2422.5 MHz
When the judgment unit judges that the Wi-Fi bandwidth information is the extended bandwidth 40MHz, the 40M bandwidth nearest to 2425MHz is a channel 7, the channel 7 to 11 which can be selected by Wi-Fi is calculated, the adjustment module adjusts the Wi-Fi signal to any channel between the channel 7 and the channel 11, and the interference of the Wi-Fi on the ZigBee is greatly reduced after adjustment as shown in FIG. 6.
It can be understood by those skilled in the art that when the Zigbee selects 11 channels, the Wi-Fi channels are arranged at the right end of the Zigbee channels because the Wi-Fi channel covers the lowest end, and if the Zigbee channels select other channels, the Wi-Fi channels are arranged at the left and right sides of the Zigbee channels according to the above method.
The embodiment of the invention also provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used for executing the method for preventing the mutual interference of the channels.
In this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It will be understood by those of ordinary skill in the art that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed by several physical components in cooperation. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, Digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
Claims (10)
1. A method of channel determination, comprising:
acquiring a channel of a first signal;
determining an isolation bandwidth of the first signal;
and determining a channel of a second signal according to the channel of the first signal and the isolation bandwidth.
Wherein the transmission rate of the first signal is less than the second signal.
2. The method of claim 1, wherein after acquiring the channel of the first signal, the method further comprises:
the channel of the first signal is fixed.
3. The method of claim 1, wherein determining the bandwidth of isolation of the first signal and the second signal comprises:
and judging the bandwidth information of the second signal.
4. The method of claim 3, wherein determining the channel for the second signal based on the channel for the first signal and the isolation bandwidth further comprises:
and determining a channel of the second signal according to the isolation bandwidth and the bandwidth information of the second signal.
5. The method of claim 3 or 4, wherein the bandwidth information of the second signal comprises one of: standard bandwidth, extended bandwidth.
6. An apparatus for channel determination, comprising:
an acquisition module, configured to acquire a channel of a first signal;
a bandwidth determination module for determining an isolation bandwidth of the first signal;
and the channel determining module is used for determining a channel of a second signal according to the channel of the first signal and the isolation bandwidth.
Wherein the transmission rate of the first signal is less than the second signal.
7. The apparatus of claim 6, further comprising:
the acquiring module is further configured to fix the channel of the first signal after acquiring the channel of the first signal.
8. The apparatus of claim 6, wherein the channel determination module further comprises:
the segment judging unit is used for judging the bandwidth information of the second signal in the current state;
and the adjusting unit is used for adjusting the channel of the second signal.
9. The apparatus of claim 8, wherein:
the bandwidth information of the second signal that can be determined by the segment determining unit includes one of: standard bandwidth, extended bandwidth.
10. A computer-readable storage medium storing computer-executable instructions for performing the method for preventing channel crosstalk according to any one of claims 1 to 6.
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| US20190123867A1 (en) * | 2017-10-23 | 2019-04-25 | Mediatek Inc. | Wireless communication method and associated wireless device |
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| CN106304226A (en) * | 2015-06-25 | 2017-01-04 | 深圳市中兴微电子技术有限公司 | A kind of WIFI cut-in method and device |
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