CN114615704A - UWB wireless channel interference avoidance algorithm - Google Patents

Abstract

The present invention provides a UWB wireless channel interference avoidance algorithm. There is UWB signal interference between the UWB positioning base station and the base station, the base station and the tag, and the base station and the tag have built-in PA (power amplifier) and LNA (low power amplifier) Noise amplifier), the UWB signal interference is related to channel, PRF (pulse repetition frequency) and Preamble Codes (preamble code). There are two types of PRF, 16MHz or 64MHz, respectively. The channel range supported in the standard includes 3.5GHz to 6.5GHz, which is divided into 6 channels (channels), of which the bandwidth of channel 4 is 1331.2MHz, the bandwidth of channel 7 is 1081.6MHz, and the rest of the bandwidth is 499.2MHz Can effectively avoid interference.

Description

A UWB Wireless Channel Interference Avoidance Algorithm

technical field

The present invention relates to the field of UWB wireless communication, in particular to a UWB wireless channel interference avoidance algorithm.

Background technique

Ultra-wideband UWB technology has been used in more and more applications, including warehousing, logistics and mines, to achieve personnel positioning, vehicle tracking and navigation. UWB is a carrier-free communication technology that uses nanosecond or even picosecond non-orthodox narrow-band pulses to transmit data. UWB has a wide frequency band, so it has strong multipath resolution and can distinguish and eliminate most of the multipath interference. At the same time, the transmit power of UWB is low, which can well shield other types of signals and environmental noise.

The surrounding environment of the roadway in the mine is complex, the multipath phenomenon of the UWB signal is more obvious in the roadway, and the signal transmission travels farther than the ground. At the same time, in order to locate UWB tags in real time, seamless handover between positioning base stations is also required, and packet loss needs to be avoided or reduced. Therefore, the coverage areas between adjacent base stations generally have overlapping areas of tens of meters. Here In the region, channel interference is more likely to occur. Once the overlapping area appears, it will cause interference to the base station and the tag, resulting in a large number of wrong UWB signals, causing the UWB chip to not decode the pulse normally, which will affect the UWB communication between the base station and the tag, and affect personnel positioning. Many errors will also cause energy loss to label-type low-power devices and reduce battery life. Therefore, we improve this and propose a UWB wireless channel interference avoidance algorithm.

SUMMARY OF THE INVENTION

The purpose of the present invention is: in view of the problems raised by the existing background technology, in order to achieve the above purpose of the present invention, a UWB wireless channel interference avoidance algorithm, including a UWB positioning base station, is characterized in that the UWB positioning base station and the base station, the There is UWB signal interference between the base station and the tag. The base station and the tag have built-in PA (power amplifier) and LNA (low noise amplifier), and the UWB signal interference is related to channel, PRF (pulse repetition frequency) and Preamble Codes (preamble). Code) correlation, PRF has two kinds of 16MHz or 64MHz, the value of Preamble Code is related to channel, the channel range supported in the IEEE802.15.4 standard includes 3.5GHz to 6.5GHz, which is divided into 6 channels (channels), The bandwidth of channel 4 is 1331.2MHz, the bandwidth of channel 7 is 1081.6MHz, and the rest of the bandwidth is 499.2MHz.

As a preferred technical solution of this application, the tag is only communicating with B1 in the overlapping area, and B2 should not participate. Base station B2 can cover this area, and base station B2 is also sending data, so the tag T can receive the signal from B1. The interference of base station B2, the signal received by base station B1 from tag T can also be interfered by base station B2. The interference affects the decoding of the signal by the UWB chip. If the decoding fails, the message frame will not be restored correctly. The communication between the base station and the tag is as follows: fail.

As a preferred technical solution of the present application, different channels, PRFs and Preamble Codes are configured between the adjacent base stations, and three channel modes are used to divide them into:

C1: channel 1, PRF64 and Preamble Codes 9;

C2: channel 2, PRF16 and Preamble Codes 3;

C3: channel 3, PRF64 and Preamble Codes 12.

As a preferred technical solution of this application, the C2 channel mode works in PRF16, which is more susceptible to signal interference than PRF64, and the interference between different PRFs will be smaller. The PRF of C1 and C3 is 64, which makes it more susceptible to interference. Small. During base station deployment, the three base stations are one-dimensionally deployed as base station B2 with B1 on the left and B2 on the right.

As a preferred technical solution of the present application, the channel mode of the base station is configured in the following two ways:

Mode 1. B1 is configured as C1, B2 is configured as C2, and B3 is configured as C3;

Mode 2. B1 is configured as C1, B2 is configured as C3, and B3 is configured as C1;

The base station and the tag work in one of the three modes described above. The tag changes dynamically according to the judgment of the base station or itself. The base station configuration mode is divided into manual configuration and automatic configuration. The manual configuration is based on To implement the entire actual base station network layout, it is necessary to select one of the three channel modes for configuration to ensure that the current configuration is not the same as the adjacent base station. Make dynamic adjustments.

As a preferred technical solution of the present application, the base station sets an initial channel mode C2, and works in the channel mode C2, the base station starts to pass the message of the Beacon frame, and periodically announces that its configuration message includes the base station ID information, and the surrounding The other base stations received the Beacon frame, and the two base stations work in the same channel mode. The base station that receives the Beacon frame will compare the base station ID1 of the Beacon frame with its own base station ID2. The ID is unique and cannot be the same. The base station determines who needs to switch the channel mode according to the base station ID. The judgment between the sending base station ID1 and the receiving base station ID2 is as follows: If ID1<ID2, the base station receiving the Beacon frame switches the channel mode, and randomly selects the Different channel modes of the current channel, if ID1>ID2, the base station receiving the Beacon frame does not make any changes.

As a preferred technical solution of the present application, the label will dynamically adjust the channel mode configuration according to the following steps, the configuration flowchart,

S1. When the label is initialized, the channel mode is set to C2;

S2. Monitor the Beacon frame sent by the base station. If the Beacon frame is received, continue to work in the current mode; otherwise, if the Beacon frame is not received twice in a row, jump to step S5;

S3. The tag receives the channel switching instruction sent by the base station, records the channel mode specified by the base station, and jumps to step 5;

S4, without receiving any frame from the base station for two consecutive Beacon cycles, jump to step S5;

S5. Switch the channel mode according to the current mode or the channel mode specified in step S3, and jump to step S2 and step S5. There are two modes for mode switching in step S5, sequential switching and base station designation.

As a preferred technical solution of the present application, the sequence switching label selects the next mode according to the current channel mode, and the channel mode in which the label works is C2, and there are two switching sequences A and B: A.C2->C3->C1 ;B.C2->C1->C3, only need to use one label switching order.

As a preferred technical solution of the present application, the base station selects a mode different from its own mode according to the configuration during deployment, and issues the channel switching instruction in step 3 to the tag, so that the tag can quickly switch to the accurate channel mode , to avoid switching to a certain channel without using the base station to work on this channel, thus avoiding wasting switching time due to multiple monitoring of Beacon frames, and also significantly reducing the power consumption of the tag.

As a preferred technical solution of the present application, the label switches to the specified channel mode and continues to process according to the normal business process. When the Beacon frame of the base station is not monitored on the specified channel mode, the label will adjust the switching order. The current label The channel mode is C2, the switching sequence is A, and the channel designated by the base station is C1, then according to the sequence of switching A, the next switching channel should be C2. Obviously, this will switch back to the previous channel mode. Therefore, this It will not switch according to A, but will change and switch directly to C3. If it fails at this time, switch according to the order of A.

Compared with the prior art, the beneficial effects of the present invention:

In the scheme of this application:

1. There is UWB signal interference between the base station and the base station, the base station and the tag through the UWB positioning, the base station and the tag have built-in PA (power amplifier) and LNA (low noise amplifier), the UWB signal interference and Channel, PRF (pulse repetition frequency) and Preamble Codes (preamble) are related. There are two types of PRF, 16MHz or 64MHz. The value of Preamble Code is related to channel. The supported channel range in the IEEE802.15.4 standard includes 3.5GHz to 64MHz. 6.5GHz;

2. Working in PRF16 through the C2 channel mode, PRF16 is more susceptible to signal interference than PRF64, and the interference between different PRFs will be smaller. The PRF of C1 and C3 is 64, making it less interference;

3. Working through one of the three modes described above by the base station and the label, the label is dynamically changed according to the judgment of the base station or itself. The base station configuration mode is divided into manual configuration and automatic configuration. The manual configuration The configuration is implemented according to the entire actual base station network layout. It is necessary to select one of the three channel modes to configure to ensure that the current configuration is not the same as the adjacent base station. The automatic configuration requires the base station to monitor the surrounding UWB signals to make. judgment for dynamic adjustment;

4. Set an initial channel mode C2 through the base station. When working in the channel mode C2, the base station starts to periodically announce its configuration message including the base station ID information through the message of the Beacon frame, and other surrounding base stations have received it. In the Beacon frame, the two base stations work in the same channel mode. The base station that receives the Beacon frame will compare the base station ID1 of the Beacon frame with its own base station ID2. The IDs of the two base stations in the system are unique and cannot be used. In the same way, the base station determines who needs to switch the channel mode according to the base station ID. The judgment between the sending base station ID1 and the receiving base station ID2 is as follows: If ID1<ID2, the base station receiving the Beacon frame switches the channel mode, and randomly selects a channel different from the current channel. mode, if ID1>ID2, the base station receiving the Beacon frame does not make any changes.

Description of drawings:

Fig. 1 is the flow chart that this application provides;

FIG. 2 is a diagram of a signal overlapping area of a base station provided by the present application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiment is a specific implementation of the present invention and is not limited to all the embodiments.

Accordingly, the following detailed descriptions of embodiments of the present invention are not intended to limit the scope of the claimed invention, but merely represent some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the embodiments of the present invention and the features and technical solutions of the embodiments are combined with each other unless there is a conflict.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

As shown in Figure 1-2, a UWB wireless channel interference avoidance algorithm includes UWB positioning base station, UWB positioning base station and base station, UWB signal interference between base station and tag, base station and tag built-in PA (power amplifier) and LNA (low noise amplifier) ), UWB signal interference is related to channel, PRF (pulse repetition frequency) and Preamble Codes (preamble code). There are two types of PRF, 16MHz or 64MHz, respectively. The value of Preamble Code is related to channel, which is supported in the IEEE802.15.4 standard. The channel range includes 3.5GHz to 6.5GHz, which is divided into 6 channels (channels), of which channel 4 has a bandwidth of 1331.2MHz, channel 7 has a bandwidth of 1081.6MHz, and the rest of the bandwidth is 499.2MHz.

As a preferred embodiment, on the basis of the above method, further, the tag is only communicating with B1 in the overlapping area, and B2 should not participate, the base station B2 can cover this area, the base station B2 is also sending data, and the tag T receives The signal of B1 can be interfered by the base station B2, and the signal received by the base station B1 of the tag T can also be interfered by the base station B2. The interference affects the decoding of the signal by the UWB chip. If the decoding fails, the message frame will not be restored correctly. Communication between tags failed.

As a preferred embodiment, on the basis of the above method, further, different channels, PRFs and Preamble Codes are configured between adjacent base stations, and three channel modes are used to divide into:

C1: channel 1, PRF64 and Preamble Codes 9;

C2: channel 2, PRF16 and Preamble Codes 3;

C3: channel 3, PRF64 and Preamble Codes 12.

As a preferred embodiment, on the basis of the above method, further, C2 channel mode works in PRF16, PRF16 is more susceptible to signal interference than PRF64, and the interference between different PRFs will be smaller, the PRF of C1 and C3 is 64, make it less disturbed. During base station deployment, the three base stations are one-dimensionally deployed as base station B2 with B1 on the left and B2 on the right.

As a preferred embodiment, on the basis of the above-mentioned manner, further, the channel mode of the base station is configured in the following two manners:

Mode 1. B1 is configured as C1, B2 is configured as C2, and B3 is configured as C3;

Mode 2. B1 is configured as C1, B2 is configured as C3, and B3 is configured as C1;

Base station and tag work One of the three modes described above. The tag changes dynamically according to the base station or its own judgment. The base station configuration mode is divided into manual configuration and automatic configuration. Manual configuration is implemented according to the entire actual base station network layout. , you need to choose one of the three channel modes to configure, to ensure that the current configuration is not the same as the adjacent base station, and automatic configuration requires the base station to monitor the surrounding UWB signals to make judgments for dynamic adjustment.

As a preferred embodiment, on the basis of the above method, further, the base station sets an initial channel mode C2, works in the channel mode C2, the base station starts to pass the message of the Beacon frame, and periodically announces that its configuration message includes the base station ID information, other base stations around have received the Beacon frame, and the two base stations work in the same channel mode. The base station that receives the Beacon frame will compare the base station ID1 of the Beacon frame with its own base station ID2. The IDs of the two base stations in the system are The only one cannot be the same. The base station determines who needs to switch the channel mode according to the base station ID. The judgment between the sending base station ID1 and the receiving base station ID2 is as follows: If ID1<ID2, the base station receiving the Beacon frame switches the channel mode, and randomly selects the same channel as the current channel. For different channel modes, if ID1>ID2, the base station receiving the Beacon frame does not make any changes.

As a preferred embodiment, on the basis of the above method, further, the label will dynamically adjust the channel mode configuration according to the following steps, the configuration flowchart,

S1. When the label is initialized, the channel mode is set to C2;

S2. Monitor the Beacon frame sent by the base station. If the Beacon frame is received, continue to work in the current mode; otherwise, if the Beacon frame is not received twice in a row, jump to step S5;

S3. The tag receives the channel switching instruction sent by the base station, records the channel mode specified by the base station, and jumps to step 5;

S4, without receiving any frame from the base station for two consecutive Beacon cycles, jump to step S5;

S5. Switch the channel mode according to the current mode or the channel mode specified in step S3, and jump to step S2 and step S5. There are two modes for mode switching in step S5, sequential switching and base station designation.

As a preferred embodiment, on the basis of the above method, further, the sequence switching label selects the next mode according to the current channel mode, the channel mode of the label operation is C2, and there are two switching sequences A and B: A.C2 ->C3->C1; B.C2->C1->C3, only one label switching order needs to be used.

As a preferred embodiment, on the basis of the above method, further, the base station selects a mode different from its own mode according to the configuration during deployment, and issues the channel switching instruction in step 3 to the tag, so that the tag can quickly Switch to the correct channel mode to avoid switching to a channel without using the base station to work on the channel, thus avoiding wasting switching time due to multiple monitoring of Beacon frames, and also significantly reducing the power consumption of the tag.

As a preferred embodiment, on the basis of the above method, further, when the label switches to the designated channel mode, it will continue to process according to the normal business process. When the Beacon frame of the base station is not monitored on the designated channel mode, the label will respond The order of switching is adjusted. The channel mode of the current label is C2, the switching sequence is A, and the channel designated by the base station is C1, then according to the sequence of switching A, the next switching channel should be C2. Obviously, this will switch back to The previous channel mode, therefore, will not be switched according to A at this time, but will be changed and switched directly to C3. If it fails at this time, it will be switched in the way of sequence A.

Working principle: In the process of using the present invention, there is UWB signal interference between the UWB positioning base station and the base station, the base station and the tag, the base station and the tag have built-in PA (power amplifier) and LNA (low noise amplifier), UWB signal interference and channel, PRF (pulse repetition frequency) is related to Preamble Codes (preamble). There are two types of PRF, 16MHz or 64MHz. The value of Preamble Code is related to the channel. The supported channel range in the IEEE802.15.4 standard includes 3.5GHz to 6.5GHz , which is divided into 6 channels (channels), of which the bandwidth of channel 4 is 1331.2MHz, the bandwidth of channel 7 is 1081.6MHz, and the rest of the bandwidths are 499.2MHz.

The tag is only communicating with B1 in the overlapping area, and B2 should not participate. Base station B2 can cover this area, and base station B2 is also sending data. The tag T receives the signal of B1 and can be interfered by base station B2, and base station B1 receives the tag. The signal of T can also be interfered by the base station B2. The interference affects the decoding of the signal by the UWB chip. If the decoding fails, the message frame will not be correctly restored, and the communication between the base station and the tag will fail.

Different channel, PRF and Preamble Codes are configured between adjacent base stations, and three channel modes are used:

C1: channel 1, PRF64 and Preamble Codes 9;

C2: channel 2, PRF16 and Preamble Codes 3;

C3: channel 3, PRF64 and Preamble Codes 12.

C2 channel mode works at PRF16, PRF16 is more susceptible to signal interference than PRF64, and the interference between different PRFs will be smaller. The PRF of C1 and C3 is 64, making it less interference. During base station deployment, the three base stations are one-dimensionally deployed as base station B2 with B1 on the left and B2 on the right.

The channel mode of the base station is configured in the following two ways:

Mode 1. B1 is configured as C1, B2 is configured as C2, and B3 is configured as C3;

Mode 2. B1 is configured as C1, B2 is configured as C3, and B3 is configured as C1;

Base station and tag work One of the three modes described above. The tag changes dynamically according to the base station or its own judgment. The base station configuration mode is divided into manual configuration and automatic configuration. Manual configuration is implemented according to the entire actual base station network layout. , you need to choose one of the three channel modes to configure, to ensure that the current configuration is not the same as the adjacent base station, and automatic configuration requires the base station to monitor the surrounding UWB signals to make judgments for dynamic adjustment.

The base station sets an initial channel mode C2, and works in the channel mode C2. The base station starts to pass the Beacon frame message, and periodically announces its configuration message including the base station ID information. The other surrounding base stations receive the Beacon frame, and the two base stations work In the same channel mode, the base station that receives the Beacon frame will compare the base station ID1 of the Beacon frame with its own base station ID2. The IDs of the two base stations in the system are unique and cannot be the same. The base station determines who needs to switch the channel mode according to the base station ID. , the judgment between the sending base station ID1 and the receiving base station ID2 is as follows: if ID1<ID2, the base station receiving the Beacon frame switches the channel mode, and randomly selects a channel mode different from the current channel; if ID1>ID2, the base station receiving the Beacon frame does not make any changes.

The label will dynamically adjust the channel mode configuration according to the following steps, the configuration flowchart,

S1. When the label is initialized, the channel mode is set to C2;

S2. Monitor the Beacon frame sent by the base station. If the Beacon frame is received, continue to work in the current mode; otherwise, if the Beacon frame is not received twice in a row, jump to step S5;

S3. The tag receives the channel switching instruction sent by the base station, records the channel mode specified by the base station, and jumps to step 5;

S4, without receiving any frame from the base station for two consecutive Beacon cycles, jump to step S5;

S5. Switch the channel mode according to the current mode or the channel mode specified in step S3, and jump to step S2 and step S5. There are two modes for mode switching in step S5, sequential switching and base station designation.

Sequentially switch labels according to the current channel mode, select the next mode, the channel mode of label work is C2, there are two switching sequences A and B: A.C2->C3->C1; B.C2->C1->C3 , the switching order of the tabs only needs one.

According to the configuration during deployment, the base station selects a mode different from its own mode, and sends it to the tag through the channel switching command in step 3, so that the tag can quickly switch to the correct channel mode, avoiding switching to a certain channel without Use the base station to work on this channel, so as to avoid wasting switching time due to multiple monitoring of Beacon frames, and also significantly reduce the power consumption of the tag.

When the tag switches to the specified channel mode, it will continue to process according to the normal business process. When the Beacon frame of the base station is not monitored on the specified channel mode, the tag will adjust the switching sequence. The current channel mode of the tag is C2, and the switching sequence For A, the channel designated by the base station is C1, then according to the sequence of switching A, the next switching channel should be C2, obviously, this will switch back to the previous channel mode, so at this time, it will not be switched according to A, Instead, it will change and switch directly to C3. If it fails at this time, it will switch in the way of sequence A.

The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although the present specification has been described in detail with reference to the above-mentioned embodiments, the present invention is not limited to the above-mentioned specific embodiments. Therefore, Any modification or replacement of the present invention; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention are all included in the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a UWB wireless channel interference avoids algorithm, includes UWB location base station, its characterized in that, UWB location base station and base station, there is UWB signal interference between base station and the label, the base station with built-in PA (power amplifier) of label and LNA (low noise amplifier), UWB signal interference is relevant with channel, PRF (pulse repetition frequency) and Preamble, PRF has two kinds to be 16MHz or 64MHz respectively, the value of Preamble Code is relevant with channel, the channel range that supports in the IEEE802.15.4 standard includes 3.5GHz to 6.5GHz, wherein divide into 6 channel (passageway), wherein channel 4's bandwidth is 1331.2MHz, channel 7's bandwidth is 1081.6MHz, remaining bandwidth all is 499.2 MHz.

2. The UWB wireless channel interference avoidance algorithm of claim 1 wherein the tag is only in communication with B1 in the overlapping area, B2 should not participate, B2 can cover the area, B2 is also sending data, tag T can be interfered by B2 if it receives B1 signal, B1 can be interfered by B2 if it receives T signal, the UWB chip decode the signal, the decode fails, the message frame is not restored correctly, and the communication between the tag and the base station is failed.

3. The UWB wireless channel interference avoidance algorithm according to claim 1, wherein different channel, PRF and Preamble Codes are configured between the adjacent base stations, and three channel modes are used:

c1 channel 1, PRF64 and Preamble Codes 9;

c2 channel 2, PRF16 and Preamble Codes 3;

c3 channel 3, PRF64 and Preamble Codes 12.

4. The UWB wireless channel interference avoidance algorithm of claim 3 wherein the C2 channel mode operates at PRF16, PRF16 is more susceptible to signal interference than PRF64, interference between different PRFs is less, and PRFs of C1 and C3 are 64, so that interference is less. In base station deployment, the three base stations are one-dimensional deployments with base station B2B 1 to the left and B2 to the right.

5. The UWB wireless channel interference avoidance algorithm of claim 1, wherein the channel mode of the base station is configured in two ways:

mode 1.B1, B2, and B3 were C1, C2, and C3, respectively;

mode 2.B1 is configured as C1, B2 is configured as C3, B3 is configured as C1;

the base station and the tag work in one of the three modes described above, the tag dynamically changes according to the base station or the self judgment, the base station configuration mode is divided into manual configuration and automatic configuration, the manual configuration is implemented according to the whole actual base station network layout, one of the three channel modes needs to be selected for configuration, the current configuration is not the same as that of the adjacent base station, and the automatic configuration needs the base station to monitor the surrounding UWB signals to make judgment so as to perform dynamic adjustment.

6. The UWB wireless channel interference avoidance algorithm of claim 5 wherein. The base station sets up an initial channel mode C2 the operation of channel mode C2, the base station begins the message through the Beacon frame, its configuration message of periodic notice includes base station ID information, other base stations around have received the Beacon frame, two base stations work in same channel mode, the base station that receives the Beacon frame will the base station ID1 of Beacon frame compares with self base station ID2, wherein the ID of two base stations in the system is unique can not be the same, the base station determines who needs to switch channel mode according to the base station ID, send base station ID1, and accept the judgement between base station ID2 as follows: if ID1< ID2, the base station receiving the Beacon frame switches channel mode, randomly selects channel mode different from the current channel, and if ID1> ID2, the base station receiving the Beacon frame does not make any change.

7. The UWB wireless channel interference avoidance algorithm of claim 1 wherein the tag dynamically adjusts the channel mode configuration, the configuration flow chart,

s1, setting the channel mode to be C2 during label initialization;

s2, monitoring a Beacon frame sent by the base station, if the Beacon frame is received, continuing to work in the current mode, otherwise, if the Beacon frame is not received for two times, jumping to the step S5;

s3, the label receives the channel switching instruction sent by the base station, records the channel mode appointed by the base station, and jumps to step 5;

s4, skipping to step S5 when no frame of the base station is received in two consecutive Beacon periods;

s5, channel mode is switched according to the current mode or the channel mode designated in step S3, and there are two ways of jumping to the mode switching in step S2 and step S5, sequential switching and base station designation.

8. The UWB wireless channel interference avoidance algorithm of claim 7 wherein the sequential switching tag selects the next mode based on the current channel mode, the channel mode of tag operation is C2, there are two switching sequences a and B: a.c2- > C3- > C1; c2- > C1- > C3, the switching order of the tags needs only one.

9. The UWB wireless channel interference avoidance algorithm of claim 1 wherein the base station selects a mode different from its own mode according to the configuration at the time of deployment, and issues to the tag through the channel switching instruction in step 3, so that the tag switches to the accurate channel mode quickly, avoiding switching to a certain channel without using the base station to work on the channel, thereby avoiding wasting switching time by monitoring Beacon frames for multiple times and significantly reducing the power consumption of the tag.

10. The UWB wireless channel interference avoidance algorithm of claim 1 wherein the tag switches to the designated channel mode and continues to process according to normal traffic flow, when no Beacon frame of the base station is heard on the designated channel mode, the tag adjusts the switching sequence, the current tag channel mode is C2, the switching sequence is A, the base station designated channel is C1, then according to the A in the sequence switching, the next switching channel should be C2, obviously, this switches back to the previous channel mode, therefore, at this time, the switching according to A will not be done, but will be changed, switch directly to C3, if this time fails, then switch according to the sequence A.

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