CN115226219A - Method and system for enhancing same-frequency anti-interference capability - Google Patents
Method and system for enhancing same-frequency anti-interference capability Download PDFInfo
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Abstract
The application discloses a method and a device for enhancing same-frequency anti-interference capability, which relate to the technical field of wireless communication, and comprise the steps of judging whether working channels of a WIFI module and a ZigBee module are overlapped or not when the working channels of the ZigBee module are not in a preset recommended channel list, and if so, allocating the working channels by adopting a collaborative coexistence scheme; if not, the working channel is distributed by adopting an optimized arbitration strategy. Optimizing the arbitration policy includes authorizing both modules to use their respective working channels when both modules are receiving; when a transceiving request of either of the two modules is transmission, the module having a high priority is granted use of its operating channel. According to the method and the device, mutual interference of WIFI and ZigBee in the same network equipment can be avoided, and the transmission rate of the network equipment is improved.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a method and a system for enhancing the same-frequency anti-interference capability.
Background
When WIFI and ZigBee air interfaces are used on the same network device, because the WIFI and ZigBee both use 2.4G frequency bands, when the size of the network device cannot meet the design requirement of antenna isolation, mutual interference can be caused between the WIFI and the ZigBee.
The existing solution of same-frequency anti-interference mainly adopts a non-cooperative coexistence scheme and a cooperative coexistence scheme.
The uncooperative coexistence scheme is that the WIFI and the ZigBee adopt a frequency division method, and mutual interference between the WIFI and the ZigBee is avoided by using separated channels. For example, the recommended channel list of ZigBee is a channel that does not overlap with WIFI, and is actually a frequency separation method.
However, if the frequency division multiplexing is simply adopted, since the occupation situation of the surrounding wireless channels is dynamically changed, theoretically, the channels in the recommended channel list are not occupied by the WIFI of the same network device, but may be occupied by other surrounding network devices (such as other ZigBee devices), the ZigBee may have to use channels other than the recommended channel list, that is, in the same network device, and the ZigBee may have to use channels that the WIFI may occupy. At this time, the WIFI and the ZigBee on the same device have a risk of mutual interference. The use of frequency division multiplexing alone is not possible.
A coordinated coexistence scheme, that is, a PTA (Packet transport Arbitration) mechanism, which essentially adopts a TDM (time-division multiplexing) mode, where only one of a WIFI transceiver and a ZigBee transceiver operates in the same time period, for example, when the WIFI is transmitting and receiving a Packet, the ZigBee cannot transmit and receive, and vice versa.
By adopting a time division multiplexing mode of a PTA mechanism, the processing of PTA regards the frequency overlapping channel scene and the frequency non-overlapping channel scene as equal as the mutual interference of WIFI and ZigBee. Although the mutual interference can be reduced, the time division multiplexing of the WIFI and the ZigBee limits the throughput of each interface and increases the delay of message transmission. Once the PTA mechanism is enabled, the same set of arbitration rules cannot be adapted to different service priority requirements and application scenarios, and certain flexibility is lacking.
Disclosure of Invention
Aiming at the defects in the prior art, the application aims to provide a method and a device for enhancing the same-frequency anti-interference capability, which can avoid mutual interference of WIFI and ZigBee in the same network equipment and improve the transmission rate of the network equipment.
In order to achieve the above purposes, the technical scheme is as follows:
the first aspect of the application provides a method for enhancing the same-frequency anti-interference capability, which is suitable for network equipment, wherein the network equipment comprises a WIFI module and a ZigBee module; the method comprises the following steps:
acquiring working channels and receiving and sending requests of the WIFI module and the ZigBee module;
when the working channel of the ZigBee module is not in the preset recommended channel list, judging whether the working channels of the WIFI module and the ZigBee module are overlapped, if so, adopting a cooperative coexistence scheme to allocate the working channel; if not, the working channel is distributed by adopting an optimized arbitration strategy;
the optimized arbitration policy includes: when the receiving and sending requests of the WIFI module and the ZigBee module are received, authorizing the two modules to simultaneously use respective working channels; and when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending, authorizing one of the two modules with high priority to use the working channel.
In some embodiments, the optimizing arbitration policy further comprises: when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module is in low priority, authorizing the WIFI module to use a working channel of the WIFI module;
and when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module has high priority, authorizing the ZigBee module to use the working channel of the ZigBee module.
In some embodiments, the channels in the recommended channel list are channels without WIFI interference.
In some embodiments, the method further comprises:
a recommended channel list is pre-configured in a ZigBee module;
when networking the ZigBee module, scanning working channels in the recommended channel list, judging whether the channels in the recommended channel list are occupied, if so, continuously scanning other channels and selecting unoccupied channels as the working channels; if not, selecting an unoccupied channel from the recommended channel list as a working channel.
In some embodiments, the method further comprises:
and when the working channel of the ZigBee module is in a preset recommended channel list, allocating the working channel by adopting a non-cooperative coexistence scheme.
In some embodiments, the method further comprises:
the ZigBee module carries out CCA detection before transmitting through the working channel every time, when the number of times of continuous detection failure reaches a preset threshold value, the ZigBee module modifies the priority transmitted in the receiving and transmitting request from low priority to high priority, and until CCA detection is successful, the ZigBee module modifies the priority transmitted in the receiving and transmitting request from high priority to low priority.
The second aspect of the application provides a system for enhancing the same-frequency anti-interference capability, which comprises network equipment, wherein the network equipment comprises a WIFI module and a ZigBee module; the system further comprises:
the host control module is connected with the WIFI module and the ZigBee module and used for acquiring working channels and receiving and sending requests of the WIFI module and the ZigBee module;
the host control module is also used for judging whether the working channels of the WIFI module and the ZigBee module are overlapped when the working channel of the ZigBee module is not in the preset recommended channel list, and if so, adopting a collaborative coexistence scheme to allocate the working channels for the WIFI module and the ZigBee module; if not, an optimized arbitration strategy is adopted to distribute working channels for the WIFI module and the ZigBee module;
the optimizing arbitration strategy comprises the steps that when the host control module judges that the receiving and sending requests of the WIFI module and the ZigBee module are received, the two modules are authorized to use respective working channels respectively; when the host control module judges that the receiving and sending request of any one of the WIFI module and the ZigBee module is sending, one of the two modules with high priority is authorized to use the working channel.
In some embodiments, the channels in the recommended channel list are channels without WIFI interference;
the host control module is also used for pre-configuring a recommended channel list in the ZigBee module according to the user input;
the host control module is also used for controlling the ZigBee module to scan working channels in the recommended channel list when the ZigBee module is in networking, judging whether the channels in the recommended channel list are all occupied, and if so, controlling the ZigBee module to continuously scan other channels and selecting the unoccupied channels from the channels as the working channels; if not, the ZigBee module is controlled to select an unoccupied channel from the recommended channel list as a working channel.
In some embodiments, the host control module is further configured to allocate a working channel to the WIFI module and the ZigBee module by using a non-cooperative coexistence scheme when the working channel of the ZigBee module is in a preset recommended channel list.
In some embodiments, the ZigBee module further comprises:
and the CCA detection unit is used for performing CCA detection before the ZigBee module transmits the information through the working channel every time, when the number of times of continuous detection failure reaches a preset threshold value, the CCA detection unit modifies the priority transmitted in the receiving and transmitting request from low priority to high priority, and until the CCA detection is successful, the CCA detection unit modifies the priority transmitted in the receiving and transmitting request from high priority to low priority.
The beneficial effect that technical scheme that this application provided brought includes:
through the combination of channel isolation and PTA anti-interference, the same-frequency anti-interference capability of WIFI and ZigBee on the same network equipment is improved, and the adaptability of the network equipment in different use environments is enhanced.
On the non-overlapping channel, the WIFI and the ZigBee simultaneously enable the receiving request, asynchronous messages sent by the sub-equipment can be processed timely, the transmission rate of the network equipment is improved, the retransmission times of the equipment are reduced, and the service life of a battery of the sub-equipment is prolonged.
Drawings
Fig. 1 is a flowchart of a method for enhancing the anti-interference capability of the same frequency in the embodiment of the present invention.
Fig. 2 is a flowchart of step A3.
Fig. 3 is a second flowchart of a method for enhancing the anti-interference capability of the same frequency in the embodiment of the present invention.
Fig. 4 is a schematic functional block diagram of a system for enhancing the same-frequency anti-interference capability in the embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1 and 4, an embodiment of the present invention provides a method for enhancing co-frequency anti-interference capability, which is applicable to a network device, where the network device includes a WIFI module 3 and a ZigBee module 1, and the method includes determining whether working channels of the WIFI module 3 and the ZigBee module 1 overlap, if the working channels of the WIFI module 3 and the ZigBee module 1 overlap, allocating working channels to the WIFI module 3 and the ZigBee module 1 by using a collaborative coexistence scheme, i.e., by using a time division multiplexing method, and if the working channels of the WIFI module 3 and the ZigBee module 1 do not overlap, allocating working channels to the WIFI module 3 and the ZigBee module 1 by using an anti-interference method based on an optimized arbitration policy.
The optimized arbitration strategy determines an arbitration result through respective receiving and sending request contents and receiving and sending request priorities of the WIFI module 3 and the ZigBee module 1, wherein the receiving and sending requests are sending requests or receiving requests, and the receiving and sending request priorities are sending high priority, sending low priority, receiving high priority and receiving low priority. When only the receiving and sending requests of the WIFI module 3 and the ZigBee module 1 are received, the WIFI module 3 and the ZigBee module 1 are authorized to receive messages by adopting the respective reported working channels, at the moment, the WIFI module 3 and the ZigBee module 1 are in a simultaneous working state, and when any one of the receiving and sending requests of the WIFI module 3 and the ZigBee module 1 is not received, only the module with the priority of the receiving and sending request being the high priority is authorized to receive or send the messages by adopting the reported working channel.
In this embodiment, when the ZigBee module 1 uses a channel that is not in the recommended channel list, the WIFI module 3 and the ZigBee module 1 may interfere with each other. Further judging, if the ZigBee module 1 and the WIFI module 3 have channel overlapping, a cooperative coexistence scheme is adopted, only one module is authorized to use the selected working channel at the same time by a PTA anti-interference method, and if the ZigBee module 1 and the WIFI module 3 have no channel overlapping, an optimized non-cooperative coexistence scheme is adopted, and channel authorization is performed on the WIFI module 3 and/or the ZigBee module 1 by optimizing an arbitration policy. When the ZigBee has to adopt channels except the recommended channel list due to the interference of other surrounding network equipment, the co-frequency anti-interference capability of the WIFI and the ZigBee on the same network equipment is improved through the combination of PTA anti-interference and channel isolation, and the adaptability of the network equipment in different use environments is enhanced.
Further, the influence of WIFI and ZigBee is asymmetrical. ZigBee is narrow-band interference relative to WIFI, interference influence of ZigBee on WIFI is small, and main interference is interference of WIFI on ZigBee. Therefore, according to the optimized arbitration strategy, when the ZigBee module 1 adopts a channel not in the recommended channel list, the WIFI module 3 and the ZigBee module 1 do not have channel overlapping, and the receiving and sending requests of the WIFI module 3 and the ZigBee module 1 are all received, the WIFI module 3 and the ZigBee module 1 are authorized to receive messages by using their respective selected working channels. On a non-overlapping channel (a common working environment), the WIFI module 3 and the ZigBee module 1 simultaneously enable receiving requests, asynchronous messages sent by the sub-equipment can be processed in time, the transmission rate of the network equipment is improved, the retransmission times of the equipment are reduced, and the service life of a battery of the sub-equipment is prolonged.
With continued reference to fig. 1, an embodiment of a method for enhancing co-frequency interference rejection is provided, the method comprising:
step A1, judging whether working channels of the WIFI module 3 and the ZigBee module 1 are overlapped or not:
if yes, go to step A2.
If not, go to step A3.
And A2, distributing working channels for the WIFI module 3 and the ZigBee module 1 by adopting a collaborative coexistence scheme.
And step A3, distributing working channels to the WIFI module 3 and the ZigBee module 1 by adopting an optimized arbitration strategy.
Further, the optimizing arbitration policy further includes: and when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module is in low priority, authorizing the WIFI module to use the working channel of the WIFI module. And when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module has high priority, authorizing the ZigBee module to use the working channel of the ZigBee module.
The optimized arbitration strategy adopts the following arbitration table to carry out authorization arbitration:
TABLE 1 arbitration Table
Because the ZigBee module 1 is used for a few times, and the transmitting and receiving time of the ZigBee module 1 is only a few seconds each time, the ZigBee module 1 is firstly authorized to use the channel to transmit when the transmitting and receiving request of the ZigBee module 1 has high priority, and the arbitration table adopted at this time is the configuration situation under the optimal scene, which is only a configuration example under the optimal scene. In other application scenarios, except that the arbitration result is only one received by the WIFI module 3 and the ZigBee module 1, the arbitration result can be configured by the user according to the application scenario when any one of the received requests of the WIFI module 3 and the ZigBee module is a transmission request, that is, in other application scenarios, the arbitration result of the arbitration table can be configured by the user according to the actual need.
Based on the foregoing embodiment, as shown in fig. 2, the step A3 is described by a specific embodiment by using the foregoing arbitration table, and includes:
step A31, judging whether the received requests of the WIFI module 3 and the ZigBee module 1 are both received:
if yes, go to step A32.
If not, go to step A33.
Step A32, the authorized WIFI module 3 and the ZigBee module 1 respectively use corresponding working channels to receive messages.
Step a33, judging whether the priority of the receiving and sending requests of the WIFI module 3 is greater than the priority of the receiving and sending requests of the ZigBee module 1:
if yes, go to step A34.
If not, go to step A35.
Step a34, authorizing the WIFI module 3 to use the selected working channel to perform message sending or message receiving.
And step A35, authorizing the ZigBee module 1 to use the selected working channel to transmit or receive the message.
In this embodiment, the interference of WIFI to ZigBee can be detailed as: the interference of WIFI transmission on ZigBee and the influence of WIFI reception on ZigBee reception are avoided. Therefore, the interference characteristics of two kinds of radio can be utilized, the problem of co-channel interference is solved, the throughput of the interface is improved, and the reliability and the performance of the equipment are improved.
In some other embodiments, the channels in the recommended channel list are channels without WIFI interference.
In the embodiment, the ZigBee alliance recommends ZigBee to preferentially use 14/15/19/20 channels, because WIFI uses 1/6/11 channels domestically, zigBee has 16 channels, the ZigBee channel overlapped with WIFI channel 1 is 11,12,13,14, the ZigBee channel overlapped with channel 6 is 16,17,18,19, the ZigBee channel overlapped with channel 11 is 21,22,23,24, the non-overlapped channel is 15,20,25,26, and the channel 14,19 is less interfered. The recommended channel list may employ channels 14/15/19/20.
In specific application, the recommended channel list may also be configured according to actual network conditions, and channels in the recommended channel list need to satisfy the condition that the channels are not occupied by the WIFI module 3.
As shown in fig. 3, an embodiment of a method for enhancing the anti-interference capability of the same frequency is provided, and the method includes:
and S1, pre-configuring a recommended channel list in the ZigBee module 1.
Step S2, the WIFI module 3 and the ZigBee module 1 are respectively networked, the ZigBee module 1 scans working channels in the recommended channel list during networking, and whether the channels in the recommended channel list are occupied or not is judged:
if yes, go to step S3.
If not, go to step S4.
And S3, the ZigBee module 1 continuously scans other channels and selects an unoccupied channel as a working channel.
And S4, the ZigBee module 1 selects an unoccupied channel from the recommended channel list as a working channel.
And S5, acquiring working channels and receiving and sending requests of the WIFI module 3 and the ZigBee module 1.
S6, judging whether the working channel of the ZigBee module 1 is in a preset recommended channel list or not:
if yes, go to step S7.
If not, go to step S8.
And S7, distributing working channels for the WIFI module 3 and the ZigBee module 1 by adopting a non-cooperative coexistence scheme.
Step S8, judging whether working channels of the WIFI module 3 and the ZigBee module 1 are overlapped or not:
if yes, go to step S9.
If not, go to step S10.
And S9, distributing working channels for the WIFI module 3 and the ZigBee module 1 by adopting a cooperative coexistence scheme.
And S10, distributing working channels to the WIFI module 3 and the ZigBee module 1 by adopting an optimized arbitration strategy.
In this embodiment, when the ZigBee module 1 establishes the ZigBee network, it preferentially scans a recommended channel list that is not occupied by WIFI, and if all the recommended channel lists are occupied, scans an optimal channel that is not occupied currently, and reports a selected channel. And the WIFI interface reports the selected channels when determining the working channel of the WIFI interface, and finally performs channel allocation according to the channels reported by the WIFI module 3 and the ZigBee module 1 respectively.
When the WIFI and ZigBee air interfaces are used on the same network device, firstly, whether a working channel of the ZigBee module 1 is in a preset recommended channel list is judged, if not, whether working channels of the WIFI module 3 and the ZigBee module 1 are overlapped is continuously judged, if the working channels of the WIFI module and the ZigBee module are overlapped, a cooperative coexistence scheme is adopted, namely, the working channels are distributed to the WIFI module 3 and the ZigBee module 1 through a time division multiplexing method, and if the working channels of the WIFI module and the ZigBee module are not overlapped, an anti-interference method based on an optimized arbitration strategy is adopted to distribute the working channels to the WIFI module 3 and the ZigBee module 1.
In some other embodiments, the method further includes performing CCA (Clear Channel Assessment) detection before the ZigBee module 1 transmits the CCA through the working Channel, when the number of consecutive detection failures reaches a preset threshold, the ZigBee module 1 changes the priority transmitted in the transceiving request from low priority to high priority, and until the CCA is successfully detected, the ZigBee module 1 changes the priority transmitted in the transceiving request from high priority to low priority
In this embodiment, when the PTA mechanism is enabled, considering that the ZigBee is sent with a MAC layer retransmission and response mechanism, the sending priority of the ZigBee module 1 is usually set to be the lowest, and when the WIFI is in a busy state, the sending of the ZigBee interface is easily blocked, so that the sending priority of the ZigBee interface needs to be improved based on a certain rule.
The ZigBee physical layer carries out CCA detection before sending, if CCA detection fails for n times continuously, the sending priority is improved, until the high priority is kept until one time of successful sending and ACK message receiving, and then the original low priority is recovered. If the retransmission fails or key information (such as a beacon frame) needs to be retransmitted, the ZigBee message can be preferentially transmitted by improving the transmission priority of the ZigBee module 1.
On a non-overlapping channel (in a common working environment), two wireless interference characteristics and a ZigBee retransmission mechanism can be utilized, the WIFI and the ZigBee can simultaneously enable the WIFI and the ZigBee to receive requests, asynchronous messages sent by the sub-equipment can be processed timely, the transmission rate of the network equipment is improved, the retransmission times of the equipment are reduced, and the service life of a battery of the sub-equipment is prolonged.
As shown in fig. 4, an embodiment of the present invention further provides a system for enhancing co-frequency anti-interference capability, where the system includes a network device, the network device includes a WIFI module 3 and a ZigBee module 1, and the system further includes a host control module 4 connected to the WIFI module 3 and the ZigBee module 1.
The host control module 4 is used for acquiring working channels and receiving and sending requests of the WIFI module 3 and the ZigBee module 1, and then the host control module 4 is also used for judging whether the working channels of the WIFI module 3 and the ZigBee module 1 are overlapped when the working channel of the ZigBee module 1 is not in a preset recommended channel list, and if so, a cooperative coexistence scheme is adopted to allocate the working channels to the WIFI module 3 and the ZigBee module 1; if not, an optimized arbitration strategy is adopted to allocate working channels for the WIFI module 3 and the ZigBee module 1.
The optimizing arbitration strategy comprises the steps that when the host control module 4 judges that the receiving and sending requests of the WIFI module 3 and the ZigBee module 1 are received, the two modules are authorized to use respective working channels respectively; when the host control module 4 judges that the transceiving request of any one of the WIFI module 3 and the ZigBee module 1 is transmission, one of the two modules with high priority is authorized to use its working channel.
Further, the optimizing arbitration policy further includes: and when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module is in low priority, authorizing the WIFI module to use the working channel of the WIFI module. And when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module has high priority, authorizing the ZigBee module to use the working channel of the ZigBee module.
In this embodiment, the host control module 4 improves the same-frequency anti-interference capability of WIFI and ZigBee on the same network device by combining channel isolation and PTA anti-interference, and enhances the adaptability of the network device in different use environments.
On a non-overlapping channel (a common working environment), the host control module 4 can enable the WIFI and the ZigBee to receive the request at the same time, and can process the asynchronous message sent by the sub-device in time, thereby improving the transmission rate of the network device, reducing the retransmission times of the device, and improving the battery life of the sub-device.
In a preferred embodiment, the channels in the recommended channel list are channels without WIFI interference.
In a preferred embodiment, the host control module 4 is further configured to pre-configure a recommended channel list in the ZigBee module 1 according to a user input.
The host control module 4 is further configured to control the ZigBee module 1 to scan a working channel in the recommended channel list and judge whether channels in the recommended channel list are occupied by the WIFI module 3 when the ZigBee module 1 is networked, and if so, control the ZigBee module 1 to continue scanning other channels and select a working channel from the channels; if not, the ZigBee module 1 is controlled to select a working channel from the recommended channel list.
In a preferred embodiment, the host control module 4 is further configured to allocate working channels to the WIFI module 3 and the ZigBee module 1 by using a non-cooperative coexistence scheme when the working channel of the ZigBee module 1 is in a preset recommended channel list.
In a preferred embodiment, the ZigBee module 1 further includes a CCA detection unit 2 connected to the WIFI module 3 and the ZigBee module 1, and configured to perform CCA detection before the ZigBee module 1 transmits through a working channel each time, when the number of times of continuous detection failure reaches a preset threshold, the CCA detection unit 2 changes the priority transmitted in the transceiving request from a low priority to a high priority, and until the CCA detection succeeds, the CCA detection unit 2 changes the priority transmitted in the transceiving request from the high priority to the low priority.
The present application is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present application, and such modifications and improvements are also considered to be within the scope of the present application.
Claims (10)
1. A method for enhancing same-frequency anti-interference capability is suitable for network equipment, wherein the network equipment comprises a WIFI module and a ZigBee module; characterized in that the method comprises:
acquiring working channels and receiving and sending requests of the WIFI module and the ZigBee module;
when the working channel of the ZigBee module is not in the preset recommended channel list, judging whether the working channels of the WIFI module and the ZigBee module are overlapped or not, and if so, allocating the working channel by adopting a cooperative coexistence scheme; if not, adopting an optimized arbitration strategy to distribute working channels;
the optimized arbitration policy includes: when the receiving and sending requests of the WIFI module and the ZigBee module are received, authorizing the two modules to simultaneously use respective working channels; and when the receiving and sending request of any one of the WIFI module and the ZigBee module is a sending request, authorizing one of the two modules with high priority to use the working channel.
2. The method for enhancing co-frequency interference rejection capability of claim 1, wherein the optimizing the arbitration policy further comprises: when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module is in low priority, authorizing the WIFI module to use a working channel of the WIFI module;
and when the receiving and sending request of any one of the WIFI module and the ZigBee module is sending and the ZigBee module has high priority, authorizing the ZigBee module to use the working channel of the ZigBee module.
3. The method for enhancing co-frequency anti-interference capability according to claim 1, wherein the channel in the recommended channel list is a channel without WIFI interference.
4. The method for enhancing co-frequency anti-interference capability according to claim 1, further comprising:
a recommended channel list is pre-configured in a ZigBee module;
when networking the ZigBee module, scanning working channels in the recommended channel list, judging whether the channels in the recommended channel list are occupied, if so, continuously scanning other channels and selecting unoccupied channels as the working channels; if not, selecting an unoccupied channel from the recommended channel list as a working channel.
5. The method for enhancing co-frequency anti-interference capability according to claim 1, further comprising:
and when the working channel of the ZigBee module is in a preset recommended channel list, allocating the working channel by adopting a non-cooperative coexistence scheme.
6. The method for enhancing co-frequency anti-interference capability according to claim 1, further comprising:
the ZigBee module carries out CCA detection before transmitting through the working channel every time, when the number of times of continuous detection failure reaches a preset threshold value, the ZigBee module modifies the priority transmitted in the receiving and transmitting request from low priority to high priority, and until CCA detection is successful, the ZigBee module modifies the priority transmitted in the receiving and transmitting request from high priority to low priority.
7. A system for enhancing the same-frequency anti-interference capability comprises network equipment, wherein the network equipment comprises a WIFI module and a ZigBee module; characterized in that the system further comprises:
the host control module is connected with the WIFI module and the ZigBee module and used for acquiring working channels and receiving and sending requests of the WIFI module and the ZigBee module;
the host control module is also used for judging whether the working channels of the WIFI module and the ZigBee module are overlapped when the working channel of the ZigBee module is not in the preset recommended channel list, and if so, adopting a collaborative coexistence scheme to allocate the working channels for the WIFI module and the ZigBee module; if not, an optimized arbitration strategy is adopted to distribute working channels for the WIFI module and the ZigBee module;
the optimizing arbitration strategy comprises the steps that when the host control module judges that the receiving and sending requests of the WIFI module and the ZigBee module are received, the two modules are authorized to use respective working channels respectively; when the host control module judges that the receiving and sending request of any one of the WIFI module and the ZigBee module is sending, one of the two modules with high priority is authorized to use the working channel.
8. The system for enhancing same-frequency anti-interference capability according to claim 7, wherein the channels in the recommended channel list are channels without WIFI interference;
the host control module is also used for pre-configuring a recommended channel list in the ZigBee module according to the user input;
the host control module is also used for controlling the ZigBee module to scan working channels in the recommended channel list when the ZigBee module is in networking, judging whether the channels in the recommended channel list are all occupied, and if so, controlling the ZigBee module to continuously scan other channels and selecting the unoccupied channels from the channels as the working channels; if not, the ZigBee module is controlled to select an unoccupied channel from the recommended channel list as a working channel.
9. The system for enhancing the same-frequency anti-interference capability according to claim 7, wherein the host control module is further configured to allocate a working channel to the WIFI module and the ZigBee module by using a non-cooperative coexistence scheme when the working channel of the ZigBee module is in a preset recommended channel list.
10. The system for enhancing the same-frequency anti-interference capability according to claim 7, wherein the ZigBee module further comprises:
and the CCA detection unit is used for performing CCA detection before the ZigBee module transmits the information through the working channel every time, when the number of times of continuous detection failure reaches a preset threshold value, the CCA detection unit modifies the priority transmitted in the receiving and transmitting request from low priority to high priority, and until the CCA detection is successful, the CCA detection unit modifies the priority transmitted in the receiving and transmitting request from high priority to low priority.
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