CN111865454B - Anti-electromagnetic wave interference WiFi communication system and communication method - Google Patents
Anti-electromagnetic wave interference WiFi communication system and communication method Download PDFInfo
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- CN111865454B CN111865454B CN202010621717.3A CN202010621717A CN111865454B CN 111865454 B CN111865454 B CN 111865454B CN 202010621717 A CN202010621717 A CN 202010621717A CN 111865454 B CN111865454 B CN 111865454B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/345—Interference values
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B15/00—Suppression or limitation of noise or interference
- H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/12—WLAN [Wireless Local Area Networks]
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Abstract
The invention discloses an anti-electromagnetic wave interference WiFi communication system and a communication method, wherein the WiFi communication system comprises a WiFi communication entity and a WiFi communication opposite terminal; the WiFi communication entity is used for periodically sending the PS-POLL packet to a WiFi communication opposite terminal in the state that the electromagnetic interference exists and the electromagnetic interference strength is lower than a set threshold value; the WiFi communication opposite end can be connected with the WiFi communication entities and used for receiving data sent by each WiFi communication entity and feeding back information to the corresponding WiFi communication entities after receiving the data. The WiFi communication entity is used for sending a PS-POLL packet to the WiFi communication opposite end when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite end under the state without electromagnetic interference. The WiFi communication system and the communication method for resisting electromagnetic wave interference can reduce or even eliminate the interference of electromagnetic interference on WiFi communication, and ensure that WiFi can be continuously communicated when being interfered by interference sources such as a microwave oven and the like.
Description
Technical Field
The invention belongs to the technical field of electronic communication, relates to a communication system, and particularly relates to an anti-electromagnetic wave interference WiFi communication system and a communication method.
Background
WiFi-based network communications are an important component of the internet of things. Many internet of things schemes of household appliances such as microwave ovens also adopt WiFi communication. At present, in a mainstream frequency band adopted by WiFi communication, a frequency band conflicting with a microwave oven exists, such as 2.4G. When the microwave oven works, electromagnetic waves in the frequency bands can be leaked out, so that interference is generated on WiFi on the microwave oven and peripheral WiFi, and communication of the WiFi is further influenced.
In view of the above, there is an urgent need to design a new WiFi communication method to overcome at least some of the above disadvantages of the existing WiFi communication methods.
Disclosure of Invention
The invention provides an anti-electromagnetic wave interference WiFi communication system and a communication method, which can reduce or even eliminate the interference of electromagnetic interference on WiFi communication, and ensure that WiFi can be continuously communicated when being interfered by interference sources such as a microwave oven and the like.
In order to solve the technical problem, according to one aspect of the invention, the following technical scheme is adopted:
a WiFi communication system resistant to electromagnetic wave interference, the WiFi communication system comprising:
the WiFi communication entity is used for periodically sending the PS-POLL packet to a WiFi communication opposite terminal in the first state; the system is also used for sending a PS-POLL packet to the WiFi communication opposite terminal when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite terminal in a second state;
the electromagnetic wave generating device generates electromagnetic waves during operation and forms electromagnetic interference on the WiFi communication entity within a set distance;
the electromagnetic interference detection module is used for detecting whether electromagnetic interference exists in the set area or not, and sensing the intensity of the electromagnetic interference if the electromagnetic interference exists; the first state is a state when the WiFi communication entity is in electromagnetic interference and the electromagnetic interference strength is lower than a set threshold value, and the second state is a state when the WiFi communication entity is not in electromagnetic interference; the electromagnetic interference detection module is connected with a WiFi communication entity and used for sending detected state data to the WiFi communication entity; and
and the WiFi communication opposite terminal can be connected with the WiFi communication entities and is used for receiving the data sent by each WiFi communication entity and feeding back information to the corresponding WiFi communication entity after receiving the data.
According to another aspect of the invention, the following technical scheme is adopted:
a WiFi communication system that resists electromagnetic wave interference, the WiFi communication system comprising:
the WiFi communication entity is used for periodically sending the PS-POLL packet to a WiFi communication opposite terminal in the state that the electromagnetic interference exists and the electromagnetic interference strength is lower than a set threshold value; and
and the WiFi communication opposite terminal can be connected with the WiFi communication entities and is used for receiving the data sent by each WiFi communication entity and feeding back information to the corresponding WiFi communication entity after receiving the data.
As an embodiment of the present invention, the WiFi communication entity is configured to send a PS-POLL packet to the WiFi communication peer only when a corresponding DTIM flag appears in a Beacon packet sent by the WiFi communication peer in a state without electromagnetic interference.
As an embodiment of the present invention, the WiFi communication system further includes an electromagnetic interference detection module, configured to detect whether there is electromagnetic interference in a set area, and if there is electromagnetic interference, induce the intensity of the electromagnetic interference; the electromagnetic interference detection module is connected with the WiFi communication entity and used for sending detected state data to the WiFi communication entity.
As an embodiment of the present invention, the WiFi communication system further comprises an electromagnetic wave generating device, which generates electromagnetic waves to form electromagnetic interference to the WiFi communication entity when it works.
According to another aspect of the invention, the following technical scheme is adopted:
a WiFi communication method resisting electromagnetic wave interference comprises the following steps:
step S1, detecting whether electromagnetic interference exists in the set area, and if so, inducing the intensity of the electromagnetic interference; sending the detected state data to a set WiFi communication entity;
step S2, judging the state of the corresponding WiFi communication entity, if the WiFi communication entity is in the state that electromagnetic interference exists and the electromagnetic interference intensity is lower than the set threshold value, the WiFi communication entity periodically sends a PS-POLL packet to a WiFi communication opposite terminal; if the WiFi communication entity is in a state without electromagnetic interference, the corresponding WiFi communication entity sends a PS-POLL packet to the WiFi communication opposite end when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite end;
and step S3, the WiFi communication opposite terminal receives the data sent by each WiFi communication entity, and feeds back information to the corresponding WiFi communication entity after receiving the data.
According to another aspect of the invention, the following technical scheme is adopted:
a WiFi communication method resisting electromagnetic wave interference comprises the following steps:
and 2, the WiFi communication opposite terminal receives the data sent by each WiFi communication entity and feeds back information to the corresponding WiFi communication entity after receiving the data.
As an embodiment of the present invention, in step 1, when a WiFi communication entity is in a state without electromagnetic interference, and a corresponding DTIM flag appears in a Beacon packet sent by the WiFi communication peer, a PS-POLL packet is sent to the WiFi communication peer.
As an embodiment of the present invention, the WiFi communication method further includes: and detecting whether the electromagnetic interference exists in the set area, and if so, sensing the intensity of the electromagnetic interference.
The invention has the beneficial effects that: the WiFi communication system and the communication method for resisting electromagnetic wave interference can reduce or even eliminate the interference of electromagnetic interference on WiFi communication, and ensure that WiFi can be continuously communicated when being interfered by interference sources such as a microwave oven and the like.
Drawings
Fig. 1 is a schematic diagram illustrating a WiFi communication system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram illustrating a WiFi communication system according to an embodiment of the present invention.
Fig. 3 is a flowchart of a WiFi communication method in an embodiment of the invention.
Fig. 4 is a flowchart of a WiFi communication method in an embodiment of the invention.
Fig. 5 is a flowchart of a WiFi communication method in an embodiment of the invention.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
For a further understanding of the present invention, reference will now be made to the following preferred embodiments of the invention in conjunction with the examples, but it is to be understood that the description is intended to further illustrate the features and advantages of the invention and is not intended to limit the scope of the claims which follow.
The description in this section is for several exemplary embodiments only and the invention is not to be limited in scope by the embodiments described. It is within the scope of the present disclosure and protection that the same or similar prior art means and some features of the embodiments may be interchanged.
The term "connected" in the specification includes both direct connection and indirect connection.
The invention discloses a WiFi communication system resisting electromagnetic wave interference, and FIG. 1 is a schematic composition diagram of the WiFi communication system in one embodiment of the invention; referring to fig. 1, the WiFi communication system includes: at least one WiFi communication entity 1 and a WiFi communication opposite terminal 2. The WiFi communication entity 1 is configured to periodically send PS-POLL packets to a WiFi communication peer in a state of electromagnetic interference and electromagnetic interference strength lower than a set threshold. The WiFi communication opposite end 2 can be connected with the WiFi communication entities 1 and used for receiving data sent by each WiFi communication entity 1 and feeding back information to the corresponding WiFi communication entity 1 after receiving the data.
In an embodiment of the present invention, the WiFi communication entity 1 is configured to send a PS-poll (power Save polling) packet to the WiFi communication peer 2 only when a corresponding DTIM flag appears in a Beacon packet sent by the WiFi communication peer 2 in a state without electromagnetic interference.
FIG. 2 is a schematic diagram of a WiFi communication system according to an embodiment of the present invention; referring to fig. 2, in an embodiment of the present invention, the WiFi communication system further includes an electromagnetic interference detection module 3, configured to detect whether there is electromagnetic interference in the set area, and if there is electromagnetic interference, induce the strength of the electromagnetic interference. The detected states mainly include two states, which are a first state (a state where the electromagnetic interference is present and the electromagnetic interference intensity is lower than a set threshold) and a second state (a state where the electromagnetic interference is absent). The electromagnetic interference detection module 3 may be disposed near the WiFi communication entity 1, may be a part of the WiFi communication entity 1, may also be disposed independently, or may be disposed at a part of the WiFi communication peer 2. In an embodiment, the electromagnetic interference detection module 3 is connected to the WiFi communication entity 1, and configured to send the detected status data to the WiFi communication entity 1.
As shown in fig. 2, in an embodiment of the present invention, the WiFi communication system may further include an electromagnetic wave generating device 4, which generates an electromagnetic wave to generate electromagnetic interference to the WiFi communication entity when it works. In one embodiment, the electromagnetic wave generating device 4 may be an electric appliance capable of generating electromagnetic waves, such as a microwave oven. The electromagnetic interference detection module 3 may be disposed in the electromagnetic wave generating device 4 (which may be disposed near the electromagnetic wave generating device 4, or may be a part of the electromagnetic wave generating device 4), and when the electromagnetic wave generating device 4 works, sends a signal of the electromagnetic wave intensity to the corresponding WiFi communication entity 1.
The invention also discloses a WiFi communication method for resisting electromagnetic wave interference, and FIG. 3 is a flow chart of the WiFi communication method in one embodiment of the invention; referring to fig. 3, the WiFi communication method includes:
and 2, the WiFi communication opposite terminal receives the data sent by each WiFi communication entity and feeds back information to the corresponding WiFi communication entity after receiving the data.
In an embodiment of the present invention, in step 1, when the WiFi communication entity is in a state without electromagnetic interference, and a corresponding DTIM flag appears in a Beacon packet sent by the WiFi communication peer, a PS-POLL packet is sent to the WiFi communication peer.
Fig. 4 and 5 are flow charts of a WiFi communication method in an embodiment of the invention; referring to fig. 4 and 5, in an embodiment of the present invention, the WiFi communication method includes:
step S1, detecting whether electromagnetic interference exists in the set area, and if so, inducing the intensity of the electromagnetic interference; sending the detected state data to a set WiFi communication entity;
step S2, determining a status of the corresponding WiFi communication entity, and if the WiFi communication entity is in a status with electromagnetic interference and the electromagnetic interference strength is lower than a set threshold, the WiFi communication entity periodically sends a PS-POLL packet to a WiFi communication peer; if the WiFi communication entity is in a state without electromagnetic interference, the corresponding WiFi communication entity sends a PS-POLL packet to the WiFi communication opposite end when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite end;
step S3, the WiFi communication peer receives data sent by each WiFi communication entity, and feeds back information to the corresponding WiFi communication entity after receiving the data.
In summary, the WiFi communication system and the communication method for resisting electromagnetic wave interference provided by the invention can reduce or even eliminate the interference of electromagnetic interference on WiFi communication, and ensure that WiFi can continue to complete communication when being interfered by interference sources such as microwave ovens.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The description and applications of the invention herein are illustrative and are not intended to limit the scope of the invention to the embodiments described above. Effects or advantages referred to in the embodiments may not be embodied in the embodiments due to interference of various factors, and the description of the effects or advantages is not intended to limit the embodiments. Variations and modifications of the embodiments disclosed herein are possible, and alternative and equivalent various components of the embodiments will be apparent to those skilled in the art. It will be clear to those skilled in the art that the present invention may be embodied in other forms, structures, arrangements, proportions, and with other components, materials, and parts, without departing from the spirit or essential characteristics thereof. Other variations and modifications of the embodiments disclosed herein may be made without departing from the scope and spirit of the invention.
Claims (9)
1. A WiFi communication system resistant to electromagnetic wave interference, said WiFi communication system comprising:
the WiFi communication entity is used for periodically sending the PS-POLL packet to a WiFi communication opposite terminal in the first state; the system is also used for sending a PS-POLL packet to the WiFi communication opposite terminal when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite terminal in a second state;
the electromagnetic wave generating device generates electromagnetic waves during operation and forms electromagnetic interference on the WiFi communication entity within a set distance;
the electromagnetic interference detection module is used for detecting whether electromagnetic interference exists in the set area or not, and inducing the intensity of the electromagnetic interference if the electromagnetic interference exists; the first state is a state when the WiFi communication entity is in electromagnetic interference and the electromagnetic interference intensity is lower than a set threshold value, and the second state is a state when the WiFi communication entity is not in electromagnetic interference; the electromagnetic interference detection module is connected with a WiFi communication entity and used for sending detected state data to the WiFi communication entity; and
and the WiFi communication opposite terminal can be connected with the WiFi communication entities and is used for receiving the data sent by each WiFi communication entity and feeding back information to the corresponding WiFi communication entity after receiving the data.
2. A WiFi communication system resistant to electromagnetic wave interference, said WiFi communication system comprising:
the WiFi communication entity is used for periodically sending the PS-POLL packet to a WiFi communication opposite terminal in the state that the electromagnetic interference exists and the electromagnetic interference strength is lower than a set threshold value; and
and the WiFi communication opposite terminal can be connected with the WiFi communication entities and is used for receiving the data sent by each WiFi communication entity and feeding back information to the corresponding WiFi communication entity after receiving the data.
3. The WiFi communication system resisting electromagnetic wave interference of claim 2, characterized in that:
the WiFi communication entity is used for sending a PS-POLL packet to the WiFi communication opposite end when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite end under the state without electromagnetic interference.
4. The WiFi communication system resisting electromagnetic wave interference of claim 3, characterized in that:
the WiFi communication system also comprises an electromagnetic interference detection module, a wireless communication module and a wireless communication module, wherein the electromagnetic interference detection module is used for detecting whether electromagnetic interference exists in a set area or not, and inducing the intensity of the electromagnetic interference if the electromagnetic interference exists; the electromagnetic interference detection module is connected with the WiFi communication entity and used for sending detected state data to the WiFi communication entity.
5. The WiFi communication system of claim 2, which resists electromagnetic wave interference, characterized in that:
the WiFi communication system also comprises an electromagnetic wave generating device which generates electromagnetic waves during operation to form electromagnetic interference on the WiFi communication entity.
6. A WiFi communication method resistant to electromagnetic wave interference is characterized by comprising the following steps:
step S1, detecting whether electromagnetic interference exists in the set area, and if so, inducing the intensity of the electromagnetic interference; sending the detected state data to a set WiFi communication entity;
step S2, judging the state of the corresponding WiFi communication entity, if the WiFi communication entity is in the state that electromagnetic interference exists and the electromagnetic interference intensity is lower than the set threshold value, the WiFi communication entity periodically sends a PS-POLL packet to a WiFi communication opposite terminal; if the WiFi communication entity is in a state without electromagnetic interference, the corresponding WiFi communication entity sends a PS-POLL packet to the WiFi communication opposite end when a corresponding DTIM mark appears in a Beacon packet sent by the WiFi communication opposite end;
and step S3, the WiFi communication opposite terminal receives the data sent by each WiFi communication entity, and feeds back information to the corresponding WiFi communication entity after receiving the data.
7. A WiFi communication method resistant to electromagnetic wave interference is characterized by comprising the following steps:
step 1, a WiFi communication entity periodically sends a PS-POLL packet to a WiFi communication opposite terminal in a state that electromagnetic interference exists and the electromagnetic interference intensity is lower than a set threshold value; and
and 2, the WiFi communication opposite terminal receives the data sent by each WiFi communication entity and feeds back information to the corresponding WiFi communication entity after receiving the data.
8. The WiFi communication method of anti-electromagnetic wave interference of claim 7, characterized in that:
in the step 1, when the WiFi communication entity is in a state without electromagnetic interference, and a corresponding DTIM flag appears in a Beacon packet sent by the WiFi communication opposite end, a PS-POLL packet is sent to the WiFi communication opposite end.
9. The WiFi communication method of resisting electromagnetic wave interference of claim 7, characterized in that:
the WiFi communication method further includes: and detecting whether the electromagnetic interference exists in the set area, and if so, sensing the intensity of the electromagnetic interference.
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